CN101582001A - Touch screen, touch module and control method - Google Patents

Abstract

A touch screen comprises a display, at least two touch units and a control unit. The display has a display surface. The touch units are arranged beside the display surface. Each touch unit comprises a light source and an image sensor. The light source is configured beside the display surface and is suitable for emitting a light beam towards a sensing space in front of the display surface. The image sensor is arranged beside the display surface, and the sensing surface of the image sensor faces the sensing space. The image sensor is suitable for capturing a bright spot in the sensing space and generating an image signal. The control unit is electrically connected to the light sources and the image sensors. The control unit is suitable for receiving the image signals from the image sensors and judging the position of the bright point relative to the display surface according to the image signals. A touch module and a control method are also provided.

Description

Translated fromChinese

触控屏幕、触控模块及控制方法Touch screen, touch module and control method

技术领域technical field

本发明是有关于一种触控模块、触控屏幕及触控模块的控制方法，且特别是有关于一种光学式触控模块、触控屏幕及此触控模块的控制方法。The present invention relates to a touch module, a touch screen and a control method of the touch module, and in particular to an optical touch module, a touch screen and a control method of the touch module.

背景技术Background technique

随着光电科技的进步，采用鼠标来控制作业平台及屏幕中的对象的方式已无法满足使用者的需求，因此，比鼠标控制还为人性化的接口便逐渐被发展出来。在这些人性化的接口中，以手指触控的方式最接近于人类一般日常生活中的经验，因此年长者或小孩或许无法操作鼠标，但却能够轻易的采用手指来触控，这点可从一些自动提款机已采用触控屏幕来获得部分的证实。With the advancement of optoelectronic technology, the method of using the mouse to control the objects on the work platform and the screen can no longer meet the needs of users. Therefore, an interface that is more humanized than mouse control has gradually been developed. Among these user-friendly interfaces, finger touch is the closest to the experience of human beings in daily life. Therefore, the elderly or children may not be able to operate the mouse, but they can easily use fingers to touch. Part of the proof is that some ATMs have adopted touch screens.

公知技术中有多种实现触控接口的方式。举例而言，有些公知液晶显示器在面板上贴附一层触控膜，来达成电容式或电阻式触控。或者，亦有公知技术将微小的触控组件作在液晶显示面板内。然而，在面板上贴附一层触控膜或将微小的触控组件作在液晶显示面板内均会影响液晶显示器的光穿透率，导致液晶显示器的光学质量下降。There are many ways to realize the touch interface in the known technology. For example, in some known liquid crystal displays, a layer of touch film is pasted on the panel to achieve capacitive or resistive touch. Alternatively, there is also a known technology to make tiny touch components in the liquid crystal display panel. However, attaching a layer of touch film on the panel or making tiny touch components in the LCD panel will affect the light transmittance of the LCD, resulting in a decrease in the optical quality of the LCD.

另有公知技术采用光学感测的方式来判断手指或触控笔相对于屏幕的位置，但这些公知技术都采用捕捉暗点(即手指或触控笔挡住光所形成的暗点)的方式来判断手指的位置。然而，为了使暗点能够清楚可辨，并降低误判的机率，须提供良好且均匀的光源，以使暗点相对背光源较为明显。这些背光源的产生方式可以在屏幕的显示面的边缘贴附反光条或发光条，但这却会同时增加了机构的复杂度与成本。再者，采用捕捉暗点的方法亦容易受到环境光的影响。具体而言，当环境光照射于手指或触控物体上，并被其反射至影像传感器时，将会造成无法判读到暗点的情形。There are other known technologies that use optical sensing to determine the position of the finger or stylus relative to the screen, but these known technologies all use the method of capturing dark spots (ie, dark spots formed by fingers or stylus blocking light) Determine the position of the finger. However, in order to make the dark spots clearly identifiable and reduce the probability of misjudgment, a good and uniform light source must be provided so that the dark spots are more obvious than the backlight. These backlight sources can be produced by attaching reflective strips or light strips to the edge of the display surface of the screen, but this will increase the complexity and cost of the mechanism at the same time. Furthermore, the method of capturing dark spots is also easily affected by ambient light. Specifically, when ambient light shines on a finger or a touch object and is reflected to the image sensor, dark spots cannot be judged.

发明内容Contents of the invention

本发明的目的在于提供一种触控屏幕、触控模块及控制方法。The purpose of the present invention is to provide a touch screen, a touch module and a control method.

本发明提供的种触控模块，其结构较为简单。The touch module provided by the present invention has a relatively simple structure.

本发明提供的控制方法，其适用于一触控模块，且具有较低的误判率。The control method provided by the present invention is suitable for a touch module and has a lower misjudgment rate.

本发明提供的触控屏幕，其具有较低的触控误判率。The touch screen provided by the present invention has a lower touch misjudgment rate.

为实现上述目的，本发明的一实施例提出一种触控模块，其适用于一显示器，以使显示器具有触控功能。显示器具有一显示面，且触控模块包括一第一影像传感器、一第二影像传感器及一控制单元。第一影像传感器配置于显示面旁的一第一位置上。第二影像传感器配置于显示面旁的一第二位置上。控制单元电性连接至光源、第一影像传感器及第二影像传感器。当至少一触控物体进入显示面前的一感测空间时，第一影像传感器与第二影像传感器会感测到触控物体所反射的光束，且控制单元适于根据第一影像传感器与第二影像传感器所感测到触控物体反射的光束而判断出触控物体相对于显示面的位置。To achieve the above object, an embodiment of the present invention provides a touch module, which is suitable for a display, so that the display has a touch function. The display has a display surface, and the touch module includes a first image sensor, a second image sensor and a control unit. The first image sensor is arranged at a first position beside the display surface. The second image sensor is arranged at a second position beside the display surface. The control unit is electrically connected to the light source, the first image sensor and the second image sensor. When at least one touch object enters a sensing space in front of the display, the first image sensor and the second image sensor will sense the light beams reflected by the touch object, and the control unit is adapted to control according to the first image sensor and the second The image sensor senses the light beam reflected by the touch object to determine the position of the touch object relative to the display surface.

在本发明的一实施例中，触控模块还包括至少一光源，配置于显示面旁，并适于发出进入感测空间的光束。In an embodiment of the present invention, the touch module further includes at least one light source disposed beside the display surface and adapted to emit light beams entering the sensing space.

在本发明的一实施例中，上述光源包括一第一光源及一第二光源，其分别配置于显示面旁的一第三位置及一第四位置。控制单元适于在多个连续的单位时间中持续控制第一光源与第二光源。每一单位时间可包括一第一子单位时间与一第二子单位时间。在第一子单位时间中，控制单元适于使第一光源处于开启状态，并使第二光源处于关闭状态。在第二子单位时间中，控制单元适于使第一光源处于关闭状态，并使第二光源处于开启状态。In an embodiment of the present invention, the above-mentioned light source includes a first light source and a second light source, which are respectively arranged at a third position and a fourth position beside the display surface. The control unit is adapted to continuously control the first light source and the second light source in a plurality of consecutive unit times. Each unit time may include a first sub-unit time and a second sub-unit time. In the first sub-unit time, the control unit is adapted to make the first light source in the on state and make the second light source in the off state. During the second sub-unit time, the control unit is adapted to make the first light source in an off state and make the second light source in an on state.

在本发明的一实施例中，在第一子单位时间中，控制单元适于使第一影像传感器处于开启状态，且使第二影像传感器处于关闭状态。在第二子单位时间中，控制单元适于使第一影像传感器处于关闭状态，且适于使第二影像传感器处于开启状态。In an embodiment of the present invention, during the first sub-unit time, the control unit is adapted to enable the first image sensor to be in an on state and the second image sensor to be in an off state. During the second sub-unit time, the control unit is adapted to make the first image sensor in the off state, and is adapted to make the second image sensor in the on state.

在本发明的一实施例中，每一单位时间还包括一第三子单位时间，在第三子单位时间中，控制单元适于使第一光源与第二光源皆处于关闭状态。控制单元适于将第一影像传感器在每一单位时间的第一子单位时间中所测得的影像亮度减去第一影像传感器在对应的单位时间的第三子单位时间中所测得的影像亮度，以获得一第一触控影像。控制单元适于将第二影像传感器在每一单位时间的第二子单位时间中所测得的影像亮度减去第二影像传感器在对应的单位时间的第三子单位时间中所测得的影像亮度，以获得一第二触控影像。控制单元根据第一触控影像与第二触控影像判断出触控物体相对于显示面的位置。In an embodiment of the present invention, each unit time further includes a third sub-unit time, and in the third sub-unit time, the control unit is adapted to turn off both the first light source and the second light source. The control unit is adapted to subtract the brightness of the image measured by the first image sensor in the first sub-unit time of each unit time from the image measured by the first image sensor in the third sub-unit time of the corresponding unit time brightness to obtain a first touch image. The control unit is adapted to subtract the image brightness measured by the second image sensor in the second sub-unit time of each unit time from the image measured by the second image sensor in the third sub-unit time of the corresponding unit time brightness to obtain a second touch image. The control unit determines the position of the touch object relative to the display surface according to the first touch image and the second touch image.

在本发明的一实施例中，第三位置与第四位置分别落在显示面的相邻的二角落旁。第一位置与第三位置可落在显示面的相同的角落旁，且第二位置与第四位置可落在显示面的相同的角落旁。In an embodiment of the present invention, the third position and the fourth position respectively fall beside two adjacent corners of the display surface. The first position and the third position may fall on the same corner of the display surface, and the second position and the fourth position may fall on the same corner of the display surface.

在本发明的一实施例中，触控模块还包括一第三影像传感器及一第四影像传感器，其分别配置于显示面旁的一第五位置及一第六位置，且第三影像传感器与第四影像传感器的感测面朝向感测空间。光源可还包括一第三光源及一第四光源，其分别配置于显示面旁的一第七位置及一第八位置。每一单位时间还包括一第四子单位时间及一第五子单位时间。在第一子单位时间中，控制单元适于使第三光源与第四光源处于关闭状态。在第二子单位时间中，控制单元适于使第三光源与第四光源处于关闭状态。在第四子单位时间中，控制单元适于使第三光源处于开启状态，并使第一、第二及第四光源处于关闭状态。在第五子单位时间中，控制单元适于使第四光源处于开启状态，并使第一、第二及第三光源处于关闭状态。In an embodiment of the present invention, the touch module further includes a third image sensor and a fourth image sensor, which are respectively arranged at a fifth position and a sixth position next to the display surface, and the third image sensor and The sensing surface of the fourth image sensor faces the sensing space. The light source may further include a third light source and a fourth light source, which are respectively arranged at a seventh position and an eighth position beside the display surface. Each unit time also includes a fourth sub-unit time and a fifth sub-unit time. During the first sub-unit time, the control unit is adapted to make the third light source and the fourth light source in an off state. During the second sub-unit time, the control unit is adapted to make the third light source and the fourth light source in an off state. In the fourth sub-unit time, the control unit is adapted to make the third light source in the on state, and make the first, second and fourth light sources in the off state. In the fifth sub-unit time, the control unit is adapted to make the fourth light source in the on state, and make the first, second and third light sources in the off state.

在本发明的一实施例中，触控物体的数量例如为二个，当这些触控物体在这些单位时间的至少其中之一中同时位于感测空间内时，在此单位时间中，第一、第二、第三及第四影像传感器所感测到的触控影像中会各自有至少一反光点，且第一、第二、第三及第四影像传感器的至少其中二者所感测到的触控影像中会各自有二个反光点。控制单元适于比对这些反光点在这些触控影像中的位置，以剔除这些触控物体所不存在的相对显示面的位置，并决定这些触控物体相对显示面的位置。In an embodiment of the present invention, the number of touch objects is, for example, two. When these touch objects are simultaneously located in the sensing space in at least one of these unit times, in this unit time, the first , the touch images sensed by the second, third and fourth image sensors will each have at least one reflective point, and at least two of the first, second, third and fourth image sensors sensed There will be two reflective points in each touch image. The control unit is adapted to compare the positions of the reflective points in the touch images to eliminate the positions of the touch objects relative to the display surface that do not exist, and determine the positions of the touch objects relative to the display surface.

在本发明的一实施例中，第一影像传感器与第二影像传感器在每一单位时间中的全部时间内皆维持于开启状态。In an embodiment of the present invention, the first image sensor and the second image sensor are kept in an on state during the whole time of each unit time.

在本发明的一实施例中，第一位置与第二位置分别落在显示面的相邻的二角落旁。In an embodiment of the present invention, the first position and the second position respectively fall beside two adjacent corners of the display surface.

在本发明的一实施例中，触控模块还包括至少一吸光条或至少一折光条，其配置于显示面的至少一边上，其中折光条适于将光束往远离显示面的方向反射。In an embodiment of the present invention, the touch module further includes at least one light-absorbing strip or at least one refraction strip disposed on at least one side of the display surface, wherein the refraction strip is suitable for reflecting the light beam away from the display surface.

本发明的另一实施例提出一种触控模块，其适用于一显示器，以使显示器具有触控功能。显示器具有一显示面，且触控模块包括一第一影像传感器、一第二影像传感器、一第一光源、一第二光源及一控制单元。第一影像传感器配置于显示面旁的一第一位置上。第二影像传感器配置于显示面旁的一第二位置上。第一光源配置于显示面旁的一第三位置上，并适于发出进入感测空间的光。第二光源配置于显示面旁的一第四位置上，并适于发出进入感测空间的光。控制单元电性连接至第一光源、第二光源、第一影像传感器及第二影像传感器。控制单元适于在多个连续的单位时间中持续控制第一光源与第二光源，且每一单位时间包括一第一子单位时间与一第二子单位时间。在第一子单位时间中，控制单元适于使第一光源处于开启状态，并使第二光源处于关闭状态。在第二子单位时间中，控制单元适于使第一光源处于关闭状态，并使第二光源处于开启状态。当至少一触控物体进入感测空间时，第一影像传感器与第二影像传感器会感测到触控物体的影像，且控制单元适于根据第一影像传感器与第二影像传感器所感测到的影像而判断出触控物体相对于显示面的位置。Another embodiment of the present invention provides a touch module, which is suitable for a display, so that the display has a touch function. The display has a display surface, and the touch module includes a first image sensor, a second image sensor, a first light source, a second light source and a control unit. The first image sensor is arranged at a first position beside the display surface. The second image sensor is arranged at a second position beside the display surface. The first light source is arranged at a third position beside the display surface, and is suitable for emitting light entering the sensing space. The second light source is arranged at a fourth position beside the display surface, and is suitable for emitting light entering the sensing space. The control unit is electrically connected to the first light source, the second light source, the first image sensor and the second image sensor. The control unit is adapted to continuously control the first light source and the second light source in a plurality of continuous unit times, and each unit time includes a first sub-unit time and a second sub-unit time. In the first sub-unit time, the control unit is adapted to make the first light source in the on state and make the second light source in the off state. During the second sub-unit time, the control unit is adapted to make the first light source in an off state and make the second light source in an on state. When at least one touch object enters the sensing space, the first image sensor and the second image sensor will sense the image of the touch object, and the control unit is adapted to sense the image according to the first image sensor and the second image sensor The image is used to determine the position of the touch object relative to the display surface.

本发明的又一实施例提出一种控制方法，其适于控制一触控模块。触控模块适用于一显示器，且显示器具有一显示面。触控模块包括一第一影像传感器及一第二影像传感器。第一影像传感器与第二影像传感器分别配置于显示面旁的一第一位置与一第二位置。此控制方法包括下列步骤。首先，当至少一触控物体进入显示面前的一感测空间时，使第一影像传感器与第二影像传感器感测到触控物体所反射的光束。接着，根据第一影像传感器与第二影像传感器所感测到触控物体反射的光束而判断出触控物体相对于显示面的位置。Another embodiment of the present invention provides a control method, which is suitable for controlling a touch module. The touch module is suitable for a display, and the display has a display surface. The touch module includes a first image sensor and a second image sensor. The first image sensor and the second image sensor are respectively arranged at a first position and a second position beside the display surface. This control method includes the following steps. Firstly, when at least one touch object enters a sensing space in front of the display, the first image sensor and the second image sensor sense the light beam reflected by the touch object. Next, the position of the touch object relative to the display surface is determined according to the light beams reflected by the touch object sensed by the first image sensor and the second image sensor.

在本发明的一实施例中，触控模块包括一第一光源及一第二光源，其分别配置于显示面旁的一第三位置及一第四位置。此控制方法适于在多个连续的单位时间中持续控制第一光源与第二光源，其中每一单位时间包括一第一子单位时间与一第二子单位时间。控制方法还包括下列步骤：在第一子单位时间中，使第一光源处于开启状态，并使第二光源处于关闭状态。在第二子单位时间中，使第一光源处于关闭状态，并使第二光源处于开启状态。In an embodiment of the present invention, the touch module includes a first light source and a second light source, which are respectively arranged at a third position and a fourth position beside the display surface. The control method is suitable for continuously controlling the first light source and the second light source in a plurality of continuous unit times, wherein each unit time includes a first sub-unit time and a second sub-unit time. The control method further includes the following steps: in the first sub-unit time, the first light source is turned on, and the second light source is turned off. In the second sub-unit time, the first light source is turned off, and the second light source is turned on.

在本发明的一实施例中，控制方法适于在这些连续的单位时间中持续控制第一影像传感器与第二影像传感器，其中控制方法还包括下列步骤：在第一子单位时间中，使第一影像传感器处于开启状态，且使第二影像传感器处于关闭状态。在第二子单位时间中，使第一影像传感器处于关闭状态，且使第二影像传感器处于开启状态。In an embodiment of the present invention, the control method is adapted to continuously control the first image sensor and the second image sensor in these continuous unit times, wherein the control method further includes the following steps: in the first sub-unit time, make the second An image sensor is turned on, and the second image sensor is turned off. In the second sub-unit time, the first image sensor is turned off, and the second image sensor is turned on.

在本发明的一实施例中，每一单位时间还包括一第三子单位时间，且控制方法还包括下列步骤。在第三子单位时间中，使第一光源与第二光源皆处于关闭状态。此外，将第一影像传感器在每一单位时间的第一子单位时间中所测得的影像亮度减去第一影像传感器在对应的单位时间的第三子单位时间中所测得的影像亮度，以获得一第一触控影像。再者，将第二影像传感器在每一单位时间的第二子单位时间中所测得的影像亮度减去第二影像传感器在对应的单位时间的第三子单位时间中所测得的影像亮度，以获得一第二触控影像。之后，根据第一触控影像与第二触控影像判断出触控物体相对于显示面的位置。In an embodiment of the present invention, each unit time further includes a third sub-unit time, and the control method further includes the following steps. In the third sub-unit time, both the first light source and the second light source are turned off. In addition, the image brightness measured by the first image sensor in the first sub-unit time of each unit time is subtracted from the image brightness measured by the first image sensor in the third sub-unit time of the corresponding unit time, to obtain a first touch image. Furthermore, the image brightness measured by the second image sensor in the second sub-unit time of each unit time is subtracted from the image brightness measured by the second image sensor in the third sub-unit time of the corresponding unit time to obtain a second touch image. Afterwards, the position of the touch object relative to the display surface is determined according to the first touch image and the second touch image.

在本发明的一实施例中，触控模块还包括一第三影像传感器及一第四影像传感器，其分别配置于显示面旁的一第五位置及一第六位置。光源可还包括一第三光源及一第四光源，其分别配置于显示面旁的一第七位置及一第八位置。每一单位时间可还包括一第四子单位时间及一第五子单位时间，控制方法适于在这些连续的单位时间中持续控制第三光源、第四光源、第三影像传感器及第四影像传感器，且控制方法还包括下列步骤。在第一子单位时间中，还使第三光源与第四光源处于关闭状态。在第二子单位时间中，还使第三光源与第四光源处于关闭状态。在第四子单位时间中，使第三光源处于开启状态，并使第一、第二及第四光源处于关闭状态。在第五子单位时间中，使第四光源处于开启状态，并使第一、第二及第三光源处于关闭状态。In an embodiment of the present invention, the touch module further includes a third image sensor and a fourth image sensor, which are respectively arranged at a fifth position and a sixth position beside the display surface. The light source may further include a third light source and a fourth light source, which are respectively arranged at a seventh position and an eighth position beside the display surface. Each unit time may further include a fourth sub-unit time and a fifth sub-unit time, and the control method is suitable for continuously controlling the third light source, the fourth light source, the third image sensor and the fourth image during these continuous unit times sensor, and the control method further includes the following steps. In the first sub-unit time, the third light source and the fourth light source are also turned off. In the second sub-unit time, the third light source and the fourth light source are also turned off. In the fourth sub-unit time, the third light source is turned on, and the first, second and fourth light sources are turned off. In the fifth sub-unit time, the fourth light source is turned on, and the first, second and third light sources are turned off.

在本发明的一实施例中，触控物体的数量例如为二个。当这些触控物体在这些单位时间的至少其中之一中同时位于感测空间内时，在单位时间中，第一、第二、第三及第四影像传感器所感测到的触控影像中可各自有至少一反光点，且第一、第二、第三及第四影像传感器的至少其中二者所感测到的触控影像中可各自有二个反光点，而控制方法还包括比对这些反光点在这些触控影像中的位置，以剔除这些触控物体所不存在的相对显示面的位置，并决定这些触控物体相对显示面的位置。In an embodiment of the present invention, the number of touch objects is, for example, two. When these touch objects are simultaneously located in the sensing space during at least one of the unit times, in the unit time, the touch images sensed by the first, second, third and fourth image sensors can be Each has at least one reflective point, and the touch images sensed by at least two of the first, second, third and fourth image sensors may each have two reflective points, and the control method further includes comparing these The positions of the reflective points in the touch images are used to eliminate the positions of the touch objects relative to the display surface that do not exist, and determine the positions of the touch objects relative to the display surface.

在本发明的一实施例中，控制方法还包括使第一影像传感器与第二影像传感器在每一单位时间中的全部时间内皆维持于开启状态。In an embodiment of the present invention, the control method further includes maintaining the first image sensor and the second image sensor in an on state for all time in each unit time.

本发明的再一实施例提出一种控制方法，其适于控制一触控模块。触控模块适用于一显示器，且显示器具有一显示面。触控模块包括一第一光源、一第二光源、一第一影像传感器及一第二影像传感器。第一影像传感器与第二影像传感器分别配置于显示面旁的一第一位置与一第二位置，且第一光源与第二光源分别配置于显示面旁的一第三位置与一第四位置。控制方法适于在多个连续的单位时间中持续控制第一光源与第二光源。每一单位时间包括一第一子单位时间与一第二子单位时间，且控制方法包括下列步骤。在第一子单位时间中，使第一光源处于开启状态，并使第二光源处于关闭状态。在第二子单位时间中，使第一光源处于关闭状态，并使第二光源处于开启状态。当一触控物体进入感测空间时，使第一影像传感器与第二影像传感器感测触控物体的影像。接着，根据第一影像传感器与第二影像传感器所感测到的影像来判断出触控物体相对于显示面的位置。Yet another embodiment of the present invention provides a control method, which is suitable for controlling a touch module. The touch module is suitable for a display, and the display has a display surface. The touch module includes a first light source, a second light source, a first image sensor and a second image sensor. The first image sensor and the second image sensor are respectively disposed at a first position and a second position beside the display surface, and the first light source and the second light source are respectively disposed at a third position and a fourth position beside the display surface . The control method is suitable for continuously controlling the first light source and the second light source in a plurality of continuous unit times. Each unit time includes a first sub-unit time and a second sub-unit time, and the control method includes the following steps. In the first sub-unit time, the first light source is turned on, and the second light source is turned off. In the second sub-unit time, the first light source is turned off, and the second light source is turned on. When a touch object enters the sensing space, the first image sensor and the second image sensor sense the image of the touch object. Next, the position of the touch object relative to the display surface is determined according to the images sensed by the first image sensor and the second image sensor.

本发明的另一实施例提出一种触控屏幕，其包括一显示器、至少二触控单元及一控制单元。显示器具有一显示面。这些触控单元配置于显示面旁，且每一触控单元包括一光源及一影像传感器。光源配置于显示面旁，并适于朝向显示面前的一感测空间发出一光束。影像传感器配置于显示面旁，且影像传感器的感测面朝向感测空间，其中影像传感器适于捕捉感测空间中的亮点，并产生一影像信号。控制单元电性连接至这些光源及这些影像传感器，其中控制单元适于接收来自这些影像传感器的这些影像信号，并根据这些影像信号判断出亮点相对于显示面的位置。Another embodiment of the present invention provides a touch screen, which includes a display, at least two touch units and a control unit. The display has a display surface. The touch units are arranged beside the display surface, and each touch unit includes a light source and an image sensor. The light source is arranged beside the display surface and is suitable for emitting a light beam toward a sensing space in front of the display surface. The image sensor is arranged beside the display surface, and the sensing surface of the image sensor faces the sensing space, wherein the image sensor is suitable for capturing bright spots in the sensing space and generating an image signal. The control unit is electrically connected to the light sources and the image sensors, wherein the control unit is suitable for receiving the image signals from the image sensors, and judging the positions of the bright spots relative to the display surface according to the image signals.

在本发明的一实施例中，控制单元适于轮流驱动这些触控单元中的这些光源。In an embodiment of the present invention, the control unit is adapted to drive the light sources in the touch units in turn.

在本发明的一实施例中，当控制单元在结束驱动这些触控单元之一的光源之后，且在开启驱动这些触控单元的另一的光源之前，控制单元适于使这些触控单元的这些光源保持关闭，且控制单元适于将每一触控单元的影像传感器在触控单元的光源被驱动时所感测到的影像亮度减去在这些光源保持关闭时所感测到的影像亮度，以获得一触控影像，并根据触控影像来判断出亮点的位置。In an embodiment of the present invention, after the control unit finishes driving the light source of one of the touch units and before turning on the other light source of the touch units, the control unit is adapted to make the touch units These light sources are kept off, and the control unit is adapted to subtract the image brightness sensed by the image sensors of each touch unit when the light sources of the touch unit are driven from the sensed image brightness when these light sources are kept off, to obtain Obtain a touch image, and determine the position of the bright spot according to the touch image.

在本发明的一实施例中，控制单元包括至少二信号处理器及一后端处理器。这些信号处理器分别电性连接至这些触控单元的影像传感器，其中每一信号处理器适于根据对应的影像传感器所感测到的影像判断出亮点的位置，并产生一一维坐标信号。后端处理器电性连接至这些信号处理器，其中后端处理器适于接收这些信号处理器所产生的这些一维坐标信号，并根据这些一维坐标信号判断出亮点相对于显示面的位置。In an embodiment of the invention, the control unit includes at least two signal processors and a backend processor. The signal processors are respectively electrically connected to the image sensors of the touch units, and each signal processor is adapted to determine the position of the bright spot according to the image sensed by the corresponding image sensor, and generate a one-dimensional coordinate signal. The back-end processor is electrically connected to these signal processors, wherein the back-end processor is suitable for receiving these one-dimensional coordinate signals generated by these signal processors, and judging the position of the bright spot relative to the display surface according to these one-dimensional coordinate signals .

在本发明的一实施例中，控制单元适于使这些影像传感器反复捕捉感测空间中的亮点，并藉此判断出亮点的位置变化。In an embodiment of the present invention, the control unit is adapted to enable the image sensors to repeatedly capture the bright spot in the sensing space, and thereby determine the position change of the bright spot.

在本发明的实施例的触控屏幕、触控模块及其控制方法中，影像传感器是用以捕捉亮点，即捕捉触控物体的反射光。相较于采用捕捉暗点(即捕捉遮光点)的触控模块，其须由反光条或发光条配置于显示面边缘以形成良好的背光源，本发明的实施例的触控屏幕及触控模块结构可以较为简单，此有助于降低触控屏幕及触控模块的成本，且亦可使触控屏幕较为美观。In the touch screen, the touch module and the control method thereof according to the embodiments of the present invention, the image sensor is used to capture the bright spot, that is, capture the reflected light of the touch object. Compared with the touch module that captures dark spots (that is, captures shading spots), it must be configured with reflective strips or light-emitting strips on the edge of the display surface to form a good backlight. The touch screen and touch panel of the embodiments of the present invention The module structure can be relatively simple, which helps to reduce the cost of the touch screen and the touch module, and also makes the touch screen more beautiful.

此外，在本发明的实施例的触控屏幕、触控模块及其控制方法中，是采用使光源轮流处于开启状态的方法，来避免影像传感器受到不必要的光源所发出的光束的干扰，因此本发明的实施例的触控屏幕、触控模块及其控制方法的误判率较低。In addition, in the touch screen, the touch module and the control method thereof in the embodiment of the present invention, the method of turning on the light source is adopted to prevent the image sensor from being interfered by the light beam emitted by the unnecessary light source, so The misjudgment rate of the touch screen, the touch module and the control method thereof in the embodiments of the present invention is relatively low.

为让本发明的上述特征和优点能还明显易懂，下文特举实施例并配合附图作详细说明。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with accompanying drawings.

附图说明Description of drawings

图1A为本发明的一实施例的触控屏幕及作业平台的主视图。FIG. 1A is a front view of a touch screen and a working platform according to an embodiment of the present invention.

图1B为图1A的触控屏幕沿着I-I线的剖面示意图。FIG. 1B is a schematic cross-sectional view of the touch screen in FIG. 1A along line I-I.

图1C为图1A中的触控单元的放大图。FIG. 1C is an enlarged view of the touch unit in FIG. 1A .

图2A为图1A的控制单元的驱动时间分布图。FIG. 2A is a driving time distribution diagram of the control unit in FIG. 1A .

图2B为图1A的触控模块的控制方法的流程图。FIG. 2B is a flow chart of the control method of the touch module in FIG. 1A .

图3A为本发明的另一实施例的触控屏幕及作业平台的主视图。FIG. 3A is a front view of a touch screen and a working platform according to another embodiment of the present invention.

图3B为图3A的触控屏幕沿着II-II线的剖面示意图。FIG. 3B is a schematic cross-sectional view of the touch screen in FIG. 3A along line II-II.

图4A为图3A的控制单元的驱动时间分布图。FIG. 4A is a driving time distribution diagram of the control unit in FIG. 3A .

图4B为图3A的触控模块的控制方法的流程图。FIG. 4B is a flow chart of the control method of the touch module in FIG. 3A .

图5A为本发明的又一实施例的触控屏幕及作业平台的主视图。FIG. 5A is a front view of a touch screen and a working platform according to another embodiment of the present invention.

图5B为图5A的触控屏幕沿着III-III线的剖面示意图。FIG. 5B is a schematic cross-sectional view of the touch screen in FIG. 5A along line III-III.

图5C绘示图5B的触控屏幕的另一变化。FIG. 5C illustrates another variation of the touch screen shown in FIG. 5B .

图6A为本发明的再一实施例的触控屏幕及作业平台的主视图。FIG. 6A is a front view of a touch screen and a working platform according to another embodiment of the present invention.

图6B为图6A的触控屏幕沿着IV-IV线的剖面示意图。FIG. 6B is a schematic cross-sectional view of the touch screen in FIG. 6A along line IV-IV.

图7为本发明的另一实施例的触控屏幕及作业平台的主视图。FIG. 7 is a front view of a touch screen and a working platform according to another embodiment of the present invention.

图8A为图7的控制单元的驱动时间分布图。FIG. 8A is a driving time distribution diagram of the control unit of FIG. 7 .

图8B为图7的触控模块的控制方法的流程图。FIG. 8B is a flow chart of the control method of the touch module in FIG. 7 .

图9为本发明的又一实施例的触控屏幕及作业平台的主视图。FIG. 9 is a front view of a touch screen and a working platform according to another embodiment of the present invention.

附图主要组件符号说明Explanation of symbols of main components in the drawings

50、50a、50b：触控物体；70：环境光源；72：环境光；90：作业平台；100、101、102、103、104、105：触控屏幕；200、201：显示器；210：显示面；220：边框；222：凹陷；224：前表面；300、302、305：触控模块；310：触控单元；312：光源；312a：第一光源；312b：第二光源；312c：第三光源；312d：第四光源；313：光束；314：影像传感器；314a：第一影像传感器；314b：第二影像传感器；314c：第三影像传感器；314d：第四影像传感器；315：感测面；316：成像组件；318、318a、318b：信号处理器；319：后端处理器；320：控制单元；330：吸光条；330a：折光条；S：感测空间S110、S110’、S110”、S112、S112”、S114、S114”、S116、S116”、S118”、S120、S120’、S120”、S122、S124：步骤；T、T’、T”：单位时间；U1：第一子单位时间；U2：第二子单位时间；U3：第三子单位时间；U4：第四子单位时间；U5：第五子单位时间。50, 50a, 50b: touch object; 70: ambient light source; 72: ambient light; 90: operating platform; 100, 101, 102, 103, 104, 105: touch screen; 200, 201: display; 210: display 220: frame; 222: depression; 224: front surface; 300, 302, 305: touch module; 310: touch unit; 312: light source; 312a: first light source; 312b: second light source; 312c: second light source Three light sources; 312d: fourth light source; 313: light beam; 314: image sensor; 314a: first image sensor; 314b: second image sensor; 314c: third image sensor; 314d: fourth image sensor; 315: sensing surface; 316: imaging component; 318, 318a, 318b: signal processor; 319: back-end processor; 320: control unit; 330: light-absorbing strip; 330a: refractive strip; S: sensing space S110, S110', S110 ", S112, S112", S114, S114", S116, S116", S118", S120, S120', S120", S122, S124: steps; T, T', T": unit time; U1: first child Unit time; U2: second sub-unit time; U3: third sub-unit time; U4: fourth sub-unit time; U5: fifth sub-unit time.

具体实施方式Detailed ways

图1A为本发明的一实施例的触控屏幕及作业平台的主视图，图1B为图1A的触控屏幕沿着I-I线的剖面示意图，而图1C为图1A中的触控单元的放大图。FIG. 1A is a front view of a touch screen and an operating platform according to an embodiment of the present invention, FIG. 1B is a schematic cross-sectional view of the touch screen of FIG. 1A along line I-I, and FIG. 1C is an enlarged view of the touch unit in FIG. 1A picture.

请参照图1A、图1B与图1C，本实施例的触控屏幕100包括一显示器200、至少二触控单元310及一控制单元320。在本实施例中，触控单元310与控制单元320可构成一触控模块300。显示器200具有一显示面210。在本实施例中，这些触控单元310配置于显示面210旁，且每一触控单元310包括至少一光源312(在图1A中是以两个光源312为例)及一影像传感器314。换言之，在本实施例中，触控模块300包括至少一光源312、一第一影像传感器314a、一第二影像传感器314b及控制单元320。Referring to FIG. 1A , FIG. 1B and FIG. 1C , thetouch screen 100 of this embodiment includes adisplay 200 , at least twotouch units 310 and acontrol unit 320 . In this embodiment, thetouch unit 310 and thecontrol unit 320 can constitute atouch module 300 . Thedisplay 200 has adisplay surface 210 . In this embodiment, thetouch units 310 are disposed beside thedisplay surface 210 , and eachtouch unit 310 includes at least one light source 312 (twolight sources 312 are taken as an example in FIG. 1A ) and animage sensor 314 . In other words, in this embodiment, thetouch module 300 includes at least onelight source 312 , afirst image sensor 314 a , asecond image sensor 314 b and acontrol unit 320 .

光源312配置于显示面210旁，并适于发出进入显示面210前的一感测空间S的一光束313。影像传感器314配置于显示面210旁，在本实施例中，影像传感器314的感测面315朝向感测空间S。在本实施例中，光束313的行进方向可大约平行于显示面210，而感测空间S定义为显示面210前光束313所能涵盖且影像传感器314所能感测到的空间，其位置与范围例如为图1A与图1B所绘示的虚框的位置与范围。此外，在本实施例中，第一影像传感器314a配置于显示面210旁的一第一位置上(例如图1A所绘示的位置)，而第二影像传感器314b配置于显示面210旁的一第二位置上(例如图1A所绘示位置)。Thelight source 312 is disposed beside thedisplay surface 210 and is adapted to emit alight beam 313 entering a sensing space S in front of thedisplay surface 210 . Theimage sensor 314 is disposed beside thedisplay surface 210 . In this embodiment, thesensing surface 315 of theimage sensor 314 faces the sensing space S. As shown in FIG. In this embodiment, the traveling direction of thelight beam 313 may be approximately parallel to thedisplay surface 210, and the sensing space S is defined as the space covered by thelight beam 313 and sensed by theimage sensor 314 in front of thedisplay surface 210. The range is, for example, the position and range of the dashed boxes shown in FIG. 1A and FIG. 1B . In addition, in this embodiment, thefirst image sensor 314a is disposed at a first position beside the display surface 210 (such as the position shown in FIG. 1A ), and thesecond image sensor 314b is disposed at a position beside thedisplay surface 210. On the second position (such as the position shown in FIG. 1A ).

在本实施例中，影像传感器314适于捕捉感测空间S中的亮点，并产生一影像信号。具体而言，当至少一触控物体50(在图1A中是以一个手指做为触控物体50为例)进入该感测空间S时，第一影像传感器314a与第二影像传感器314b会感测到触控物体50所反射的光束313，而此物体50成像于影像传感器314上的影像即为一亮点。在本实施例中，影像传感器314前可配置有一成像组件316，以将物体50所反射的光束313成像于影像传感器314上，其中成像组件316例如为透镜或针孔。In this embodiment, theimage sensor 314 is suitable for capturing bright spots in the sensing space S and generating an image signal. Specifically, when at least one touch object 50 (in FIG. 1A, a finger is used as thetouch object 50 as an example) enters the sensing space S, thefirst image sensor 314a and thesecond image sensor 314b will sense Thelight beam 313 reflected by thetouch object 50 is detected, and the image of theobject 50 formed on theimage sensor 314 is a bright spot. In this embodiment, animaging component 316 may be disposed in front of theimage sensor 314 to image thelight beam 313 reflected by theobject 50 on theimage sensor 314 , wherein theimaging component 316 is, for example, a lens or a pinhole.

在本实施例中，控制单元320电性连接至这些光源312及这些影像传感器314，其中控制单元320适于接收来自这些影像传感器314的影像信号，并根据这些影像信号判断出亮点相对于显示面210的位置。换言之，在本实施例中，控制单元320适于根据第一影像传感器314a与第二影像传感器314b所感测到触控物体50反射的光束313而判断出触控物体50相对于显示面210的位置。在本实施例中，光源312例如为发光二极管(lightemitting diode，LED)、激光二极管(laser diode)或其它适当的发光组件，而光束313例如为红外光束、可见光束、激光束或其它适当波长范围的电磁波射束，但本发明并不以此为限。此外，触控物体50例如为使用者的手指或触控笔的笔尖。In this embodiment, thecontrol unit 320 is electrically connected to thelight sources 312 and theimage sensors 314, wherein thecontrol unit 320 is suitable for receiving image signals from theimage sensors 314, and judging the brightness of the bright spots relative to the display surface according to the image signals. 210 location. In other words, in this embodiment, thecontrol unit 320 is adapted to determine the position of thetouch object 50 relative to thedisplay surface 210 according to thelight beam 313 reflected by thetouch object 50 sensed by thefirst image sensor 314 a and thesecond image sensor 314 b . In this embodiment, thelight source 312 is, for example, a light emitting diode (light emitting diode, LED), a laser diode (laser diode) or other suitable light-emitting components, and thebeam 313 is, for example, an infrared beam, a visible beam, a laser beam or other suitable wavelength ranges electromagnetic wave beams, but the present invention is not limited thereto. In addition, thetouch object 50 is, for example, a user's finger or a tip of a stylus.

在本实施例中，控制单元320包括至少二信号处理器318(在图1A中是以二信号处理器318a与318b为例)及一后端处理器319。这些信号处理器318分别电性连接至这些触控单元310的影像传感器314，亦即信号处理器318a与信号处理器318b分别电性连接至第一影像传感器314a与第二影像传感器314b。每一信号处理器318适于根据对应的影像传感器314所感测到的影像判断出亮点的位置，并产生一一维坐标信号，此一维坐标信号例如是代表触控物体50所反射的光束313入射影像传感器314的入射角。后端处理器319电性连接至这些信号处理器318，其中后端处理器319适于接收这些信号处理器318所产生的这些一维坐标信号，并根据这些一维坐标信号判断出亮点相对于显示面的位置。具体而言，后端处理器319可根据光束313入射两个不同的影像传感器314的两个入射角计算出亮点相对于显示面的位置。在本实施例中，当后端处理器319计算出亮点相对于显示面的位置后，可传送一位置讯号至与后端处理器319连接的作业平台90，如此作业平台90便可判断出触控物体50相对于显示面所显示的画面的位置，由此实现触控功能。在本实施例中，作业平台90例如为一计算机，然而，在其它实施例中，作业平台90亦可以是一手机本体、个人数字助理(personal digital assistant，PDA)本体、数码相机本体或其它适当的电子控制系统或电子组件。In this embodiment, thecontrol unit 320 includes at least two signal processors 318 (twosignal processors 318 a and 318 b are taken as examples in FIG. 1A ) and a back-end processor 319 . Thesignal processors 318 are respectively electrically connected to theimage sensors 314 of thetouch units 310 , that is, thesignal processor 318 a and thesignal processor 318 b are respectively electrically connected to thefirst image sensor 314 a and thesecond image sensor 314 b. Eachsignal processor 318 is adapted to determine the position of the bright spot according to the image sensed by thecorresponding image sensor 314, and generate a one-dimensional coordinate signal, such as the one-dimensional coordinate signal representing thelight beam 313 reflected by thetouch object 50 The incident angle of theincident image sensor 314 . The back-end processor 319 is electrically connected to thesignal processors 318, wherein the back-end processor 319 is suitable for receiving the one-dimensional coordinate signals generated by thesignal processors 318, and judging the relative position of the bright spot according to the one-dimensional coordinate signals. Displays the location of the face. Specifically, the back-end processor 319 can calculate the position of the bright spot relative to the display surface according to two incident angles at which thelight beam 313 enters twodifferent image sensors 314 . In this embodiment, after the back-end processor 319 calculates the position of the bright spot relative to the display surface, it can send a position signal to theoperation platform 90 connected to the back-end processor 319, so that theoperation platform 90 can determine the touch point. The position of thecontrol object 50 relative to the picture displayed on the display surface is realized, thereby realizing the touch function. In this embodiment, the operatingplatform 90 is, for example, a computer; however, in other embodiments, the operatingplatform 90 can also be a mobile phone body, a personal digital assistant (personal digital assistant, PDA) body, a digital camera body or other suitable electronic control systems or electronic components.

值得注意的是，本发明并不限定信号处理器318与后端处理器319的配置位置与分合状态。举例而言，在本实施例中，信号处理器318是组合于触控单元310中，而后端处理器319与信号处理器318间则是以传输线电性连接。然而，在其它实施例中，信号处理器318亦可与后端处理器319整合于同一芯片中。或者，信号处理器318a与信号处理器318b其中之一可与后端处理器319整合于同一芯片中，而信号处理器318a与信号处理器318b的另一再通过传输线与此芯片电性连接。或者，后端处理器319亦可整合至作业平台90的处理器中，亦即后端处理器319的运算功能可利用作业平台90中的程序及处理器来完成。It should be noted that the present invention does not limit the configuration positions and on-off states of thesignal processor 318 and the back-end processor 319 . For example, in this embodiment, thesignal processor 318 is combined in thetouch unit 310 , and the back-end processor 319 and thesignal processor 318 are electrically connected by a transmission line. However, in other embodiments, thesignal processor 318 and thebackend processor 319 can also be integrated in the same chip. Alternatively, one of thesignal processor 318a and thesignal processor 318b can be integrated with the back-end processor 319 in the same chip, and the other of thesignal processor 318a and thesignal processor 318b is electrically connected to the chip through a transmission line. Alternatively, the back-end processor 319 can also be integrated into the processor of the operatingplatform 90 , that is, the calculation function of the back-end processor 319 can be completed by the programs and processors in the operatingplatform 90 .

在本实施例中，光源312包括至少一第一光源312a(在图1A中是以二个第一光源312a为例)及至少一第二光源312b(在图1A中是以二个第二光源312b为例)，其分别配置于显示面210旁的一第三位置及一第四位置(例如图1A所绘示的位置)。在本实施例中，第三位置与第四位置分别落在显示面的相邻的二角落旁。第一位置与第三位置可落在显示面的相同的角落旁，且第二位置与第四位置可落在显示面的相同的角落旁。此外，第一位置与第二位置可分别落在显示面的相邻二角落旁。换言之，在本实施例中，第一光源312a与第一影像传感器314a是整合在二触控单元310其中之一，第二光源312b与第二影像传感器314b是整合在二触控单元310之另一，且此二触控单元310分别配置于显示面210的相邻两角落旁。In this embodiment, thelight source 312 includes at least onefirst light source 312a (twofirst light sources 312a are used as an example in FIG. 1A ) and at least one secondlight source 312b (two second light sources are used in FIG. 312b as an example), which are respectively arranged at a third position and a fourth position beside the display surface 210 (such as the position shown in FIG. 1A ). In this embodiment, the third position and the fourth position respectively fall beside two adjacent corners of the display surface. The first position and the third position may fall on the same corner of the display surface, and the second position and the fourth position may fall on the same corner of the display surface. In addition, the first position and the second position may respectively fall beside two adjacent corners of the display surface. In other words, in this embodiment, thefirst light source 312a and thefirst image sensor 314a are integrated in one of the twotouch units 310 , and the secondlight source 312b and thesecond image sensor 314b are integrated in the other of the twotouch units 310 One, and the twotouch units 310 are respectively disposed beside two adjacent corners of thedisplay surface 210 .

图2A为图1A的控制单元的驱动时间分布图。请参照图1A至图1C即图2A，在本实施例中，控制单元320适于轮流驱动这些触单元310中的光源312。具体而言，控制单元320适于在多个连续的单位时间T中持续控制第一光源312a与第二光源312b。每一单位时间T可包括一第一子单位时间U1与一第二子单位时间U2。在第一子单位时间U1中，控制单元320适于使第一光源312a处于开启状态，并使第二光源312b处于关闭状态。换言之，如图2A所绘示，亦即在第一子单位时间U1中以电流驱动第一光源312a，并使通过第二光源312b的电流实质上为零。在第二子单位时间U2中，控制单元320适于使第一光源312a处于关闭状态，并使第二光源312b处于开启状态。换言之，如图2A所绘示，亦即在第一子单位时间U1中以使通过第一光源312a的电流实质上为零，并以电流驱动第二光源312b。值得注意的是，图2A中的驱动电流的波形是以方波为例，但在其它实施例中，驱动电流的波形亦可以是正弦波、三角波、圆波、左右不对称的波形、其它规则形状的波形或其它不规则形状的波形。FIG. 2A is a driving time distribution diagram of the control unit in FIG. 1A . Referring to FIG. 1A to FIG. 1C ie FIG. 2A , in this embodiment, thecontrol unit 320 is adapted to drive thelight sources 312 in thetouch units 310 in turn. Specifically, thecontrol unit 320 is adapted to continuously control the firstlight source 312 a and the secondlight source 312 b in a plurality of continuous unit times T. Each unit time T may include a first sub-unit time U1 and a second sub-unit time U2. In the first sub-unit time U1, thecontrol unit 320 is adapted to make thefirst light source 312a in the on state and make the secondlight source 312b in the off state. In other words, as shown in FIG. 2A , the firstlight source 312 a is driven with current during the first sub-unit time U1 , and the current passing through the secondlight source 312 b is substantially zero. In the second sub-unit time U2, thecontrol unit 320 is adapted to make thefirst light source 312a in the off state, and make the secondlight source 312b in the on state. In other words, as shown in FIG. 2A , in the first sub-unit time U1 , the current passing through the firstlight source 312 a is substantially zero, and the secondlight source 312 b is driven with current. It is worth noting that the waveform of the driving current in Figure 2A is a square wave as an example, but in other embodiments, the waveform of the driving current can also be a sine wave, a triangular wave, a circular wave, a left-right asymmetrical waveform, or other rules. shaped waveforms or other irregularly shaped waveforms.

在本实施例中，在第一子单位时间U1中，控制单元320适于使第一影像传感器314a处于开启状态，且使第二影像传感器314b处于关闭状态，如图2A所绘示。此外，在第二子单位时间U2中，控制单元320适于使第一影像传感器314a处于关闭状态，且适于使第二影像传感器314b处于开启状态。值得注意的是，此处所谓影像传感器的开启或关闭包括实质上的开启或关闭，或者亦可分别为数据有效或数据无效。In this embodiment, during the first sub-unit time U1, thecontrol unit 320 is adapted to enable thefirst image sensor 314a to be in the on state and thesecond image sensor 314b to be in the off state, as shown in FIG. 2A . In addition, in the second sub-unit time U2, thecontrol unit 320 is adapted to make thefirst image sensor 314a in the off state, and is suitable for making thesecond image sensor 314b in the on state. It should be noted that the so-called turning on or off of the image sensor here includes turning on or off substantially, or it can also be data valid or data invalid, respectively.

如此一来，当第一影像传感器314a在第一子单位时间U1中开启且感测时，便能够感测到第一光源312a所发出的光束313的反射光，但不会感测到第二光源314b直射至第一影像传感器314a的光束313或经由反射而传递到第一影像传感器314a的光束313，因此第一影像传感器314a的感测结果不会受到第二光源314b的干扰。反之，当第二影像传感器314b在第二子单位时间U2中开启且感测时，便能够感测到第二光源312b所发出的光束313的反射光，但不会感测到第一光源314a直射至第二影像传感器314b的光束313或经由反射而传递到第二影像传感器314b的光束313。因此第二影像传感器314b的感测结果不会受到第一光源314a的干扰。由于影像传感器314所感测结果不会受到不同触控单元310的光源312所干扰，因此本实施例的触控屏幕100及其触控模块300的误判率较低。In this way, when thefirst image sensor 314a is turned on and sensing in the first sub-unit time U1, it can sense the reflected light of thelight beam 313 emitted by thefirst light source 312a, but will not sense the reflected light of thelight beam 313 emitted by the secondlight source 312a. Thelight source 314b directly irradiates thelight beam 313 of thefirst image sensor 314a or is transmitted to thelight beam 313 of thefirst image sensor 314a through reflection, so the sensing result of thefirst image sensor 314a will not be interfered by the secondlight source 314b. Conversely, when thesecond image sensor 314b is turned on and sensing in the second sub-unit time U2, it can sense the reflected light of thelight beam 313 emitted by the secondlight source 312b, but will not sense thefirst light source 314a Thelight beam 313 that directly hits thesecond image sensor 314b or is transmitted to thelight beam 313 that is reflected to thesecond image sensor 314b. Therefore, the sensing result of thesecond image sensor 314b will not be disturbed by thefirst light source 314a. Since the sensing result of theimage sensor 314 will not be interfered by thelight sources 312 ofdifferent touch units 310 , the misjudgment rate of thetouch screen 100 and itstouch module 300 in this embodiment is relatively low.

值得注意的是，本发明并不限定第一子单位时间U1与第二子单位时间U2在单位时间T中的排列顺序及分布长度。举例而言，在其它实施例中，第二子单位时间U2可排在第一子单位时间U1前。或者，第一子单位时间U1与第二子单位时间U2可以彼此相接或不相接，且第一子单位时间与第二子单位时间亦没有一定要占满整段单位时间T。另外，本发明并不限定第一影像传感器314a与第二影像传感器314b须交替开启。在其它实施例中，第一影像传感器314a与第二影像传感器314b亦可以在每一单位时间T中的全部时间内皆维持于开启状态，且控制单元320例如适于在第一子单位时间U1中取第一影像传感器314a的感测结果来分析(亦即此时第一影像传感器314a的数据为有效，而第二影像传感器314b的数据为无效)，并于第二子单位时间U2中取第二影像传感器314b的感测结果来分析(亦即此时第二影像传感器314b的数据为有效，而第一影像传感器314a的数据为无效)。如此一来，即使影像传感器314没有适时关闭，亦不会影响到控制单元320对触控物体50的位置的判断结果。It should be noted that the present invention does not limit the arrangement order and distribution length of the first sub-unit time U1 and the second sub-unit time U2 in the unit time T. For example, in other embodiments, the second sub-unit time U2 may be ranked before the first sub-unit time U1. Alternatively, the first sub-unit time U1 and the second sub-unit time U2 may or may not be adjacent to each other, and the first sub-unit time and the second sub-unit time do not necessarily occupy the entire unit time T. In addition, the present invention does not limit that thefirst image sensor 314 a and thesecond image sensor 314 b must be turned on alternately. In other embodiments, thefirst image sensor 314a and thesecond image sensor 314b can also be kept in the on state during the whole time of each unit time T, and thecontrol unit 320 is adapted to, for example, be adapted to the first sub-unit time U1 The sensing result of thefirst image sensor 314a is taken for analysis (that is, the data of thefirst image sensor 314a is valid at this time, while the data of thesecond image sensor 314b is invalid), and is obtained in the second sub-unit time U2 The sensing result of thesecond image sensor 314b is analyzed (that is, the data of thesecond image sensor 314b is valid at this time, while the data of thefirst image sensor 314a is invalid). In this way, even if theimage sensor 314 is not turned off in time, it will not affect the judgment result of thecontrol unit 320 on the position of thetouch object 50 .

在本实施例的触控屏幕100及触控模块300中，影像传感器312是用以捕捉亮点，即捕捉触控物体50的反射光。相较于采用捕捉暗点(即捕捉遮光点)的触控模块，其须由反光条或发光条配置于显示面边缘以形成良好的背光源，本实施例的触控屏幕100及触控模块300不须加装这些反光条或发光条，因此结构较为简单，且有助于降低触控屏幕100及触控模块300的成本，且亦可使触控屏幕100较为美观。此外，本实施例的触控模块300是设置于显示面210旁，而不会遮挡从显示面210出射的光线。相较于公知触控膜因覆盖显示面而会影响显示器的光学质量，本实施例的触控模块300不会影响显示器200的光学质量，因此本实施例的触控屏幕100具有较佳的光学质量。In thetouch screen 100 and thetouch module 300 of this embodiment, theimage sensor 312 is used to capture bright spots, that is, capture the reflected light of thetouch object 50 . Compared with the touch module that captures dark spots (that is, captures shading spots), it must be arranged on the edge of the display surface with reflective strips or light-emitting strips to form a good backlight. Thetouch screen 100 and the touch module of this embodiment The 300 does not need to install these reflective strips or light strips, so the structure is relatively simple, and it helps to reduce the cost of thetouch screen 100 and thetouch module 300 , and also makes thetouch screen 100 more beautiful. In addition, thetouch module 300 of this embodiment is disposed beside thedisplay surface 210 without blocking the light emitted from thedisplay surface 210 . Compared with the known touch film that affects the optical quality of the display due to covering the display surface, thetouch module 300 of this embodiment does not affect the optical quality of thedisplay 200, so thetouch screen 100 of this embodiment has better optical quality. quality.

此外，在本实施例中，控制单元320适于使影像传感器314反复捕捉感测空间S中的亮点，并由此判断出亮点的位置变化。如此一来，作业平台90便能够得知触控物体50的运动状态，以实现类似于鼠标拖曳的功能。In addition, in this embodiment, thecontrol unit 320 is adapted to enable theimage sensor 314 to repeatedly capture the bright spot in the sensing space S, and thereby determine the position change of the bright spot. In this way, the workingplatform 90 can know the motion state of thetouch object 50 to realize a function similar to mouse dragging.

值得注意的是，本发明并不限定触控模块300必须具有光源312，在其它实施例中，触控模块300亦可不具有光源312，而光束313则是由其它光源(例如为环境的发光源或反射光源)所提供。It is worth noting that the present invention does not limit thetouch module 300 to have thelight source 312. In other embodiments, thetouch module 300 may not have thelight source 312, and thelight beam 313 is formed by other light sources (such as an ambient light source). or reflected light source) provided.

图2B为图1A的触控模块的控制方法的流程图。请参照图1A、图2A及图2B，本实施例的控制方法适于控制图1A的触控模块300，而此控制方法可由控制单元320来执行。本实施例的控制方法包括下列步骤：FIG. 2B is a flow chart of the control method of the touch module in FIG. 1A . Please refer to FIG. 1A , FIG. 2A and FIG. 2B , the control method of this embodiment is suitable for controlling thetouch module 300 in FIG. 1A , and this control method can be executed by thecontrol unit 320 . The control method of the present embodiment comprises the following steps:

首先，执行步骤S110，步骤S110为当至少一触控物体50(在本实施例中是以一个触控物体50为例)进入感测空间S时，使第一影像传感器314a与第二影像传感器314b感测到触控物体所反射的光束。在本实施例中，步骤S110包括步骤S112与步骤S114。步骤S112为在第一子单位时间U1中，使第一光源312a处于开启状态，并使第二光源312b处于关闭状态。步骤S114为在第二子单位时间U2中，使第一光源312a处于关闭状态，并使第二光源312b处于开启状态。在本实施例中，步骤S114是在步骤S112之后执行，然而，在其它实施例中，两者的执行顺序亦可以对调。First, step S110 is executed. Step S110 is to make thefirst image sensor 314a and thesecond image sensor 314b senses the light beam reflected by the touch object. In this embodiment, step S110 includes step S112 and step S114. Step S112 is to turn on the firstlight source 312 a and turn off the secondlight source 312 b in the first sub-unit time U1 . Step S114 is to turn off thefirst light source 312a and turn on the secondlight source 312b during the second sub-unit time U2. In this embodiment, the step S114 is executed after the step S112, however, in other embodiments, the execution order of the two can also be reversed.

在执行步骤S112时，本实施例的控制方法可还包括使第一影像传感器314a处于开启状态，且使第二影像传感器314b处于关闭状态。此外，在执行步骤S114时，本实施例的控制方法可还包括使第一影像传感器314a处于关闭状态，且使第二影像传感器314b处于开启状态。然而，在其它实施例中，亦可以使第一影像传感器314a与第二影像传感器314b在每一单位时间中的全部时间内皆维持于开启状态。When step S112 is executed, the control method of this embodiment may further include enabling thefirst image sensor 314a to be in an on state, and making thesecond image sensor 314b to be in an off state. In addition, when step S114 is executed, the control method of this embodiment may further include turning off thefirst image sensor 314 a and turning on thesecond image sensor 314 b. However, in other embodiments, thefirst image sensor 314a and thesecond image sensor 314b may also be kept in the on state during the whole time of each unit time.

接着，执行步骤S120，步骤S120为根据第一影像传感器314a与第二影像传感器314b所感测到触控物体50反射的光束313而判断出触控物体50相对于显示面210的位置。Next, step S120 is executed. Step S120 is to determine the position of thetouch object 50 relative to thedisplay surface 210 according to thelight beam 313 reflected by thetouch object 50 sensed by thefirst image sensor 314 a and thesecond image sensor 314 b.

之后，可重复执行步骤S110与S 120，如此便可持续感测触控物体50的位置变化状态。Afterwards, steps S110 and S120 can be repeatedly executed, so that the position change state of thetouch object 50 can be continuously sensed.

本实施例的控制方法采用感测亮点(即触控物体50反光点)的方式。相较于采用感测暗点(即触控物体遮光点)的方式须利用反光条或发光条，本实施例的控制方法无需利用反光条或发光条，因此有助于简化触控模块300的结构。另外，由于本实施例的控制方法采用使光源312交替闪烁的方式，因此影像传感器314不会受到不同的触控单元310的光源312的干扰，因此本实施例的控制方法具有较低的误判率。The control method of this embodiment adopts the method of sensing bright spots (ie, the reflective points of the touch object 50 ). Compared with the method of sensing dark spots (that is, the shading point of the touch object) that needs to use reflective strips or light-emitting strips, the control method of this embodiment does not need to use reflective strips or light-emitting strips, thus helping to simplify thetouch module 300. structure. In addition, since the control method of this embodiment adopts the method of making thelight source 312 blink alternately, theimage sensor 314 will not be interfered by thelight source 312 of adifferent touch unit 310, so the control method of this embodiment has lower misjudgment Rate.

图3A为本发明的另一实施例的触控屏幕及作业平台的主视图，图3B为图3A的触控屏幕沿着II-II线的剖面示意图，而图4A为图3A的控制单元的驱动时间分布图。请参照图3A、图3B与图4A，本实施例的触控屏幕101与上述触控屏幕100(如图1A与图1B所绘示)类似，而两者的差异如下所述。在图1B的触控屏幕100中，显示面210内凹于显示器200的边框220。然而，在本实施例的触控屏幕中，显示面210与边框220的表面实质上在同一平面上。在使用此种显示器201时，环境光源70(例如为发光源或反射光源)所发出的环境光72容易干扰到影像传感器314的感测结果。为了解决此问题，在本实施例中，每一单位时间T’还包括一第三子单位时间U3。在第三子单位时间U3中，控制单元320适于使第一光源312a与第二光源312b皆处于关闭状态。控制单元320适于将第一影像传感器314a在每一单位时间T’的第一子单位时间U1中所测得的影像亮度减去第一影像传感器314a在对应的单位时间T’的第三子单位时间U3中所测得的影像亮度，以获得一第一触控影像。控制单元320适于将第二影像传感器314b在每一单位时间T’的第二子单位时间U2中所测得的影像亮度减去第二影像传感器314b在对应的单位时间T’的第三子单位时间U3中所测得的影像亮度，以获得一第二触控影像。控制单元根据第一触控影像与第二触控影像判断出触控物体50相对于显示面的位置。换言之，在第三子单位时间U3中，第一影像传感器314a与第二影像传感器314b皆处于开启状态。然而，在其它实施例中，亦可以将第三子单位时间U3分成两个不同的子单位时间，而第一影像传感器314a与第二影像传感器314b分别在此两不同的子单位时间中开启。Fig. 3A is a front view of a touch screen and a working platform according to another embodiment of the present invention, Fig. 3B is a schematic cross-sectional view of the touch screen of Fig. 3A along line II-II, and Fig. 4A is a schematic view of the control unit of Fig. 3A Driving time distribution diagram. Please refer to FIG. 3A , FIG. 3B and FIG. 4A , thetouch screen 101 of this embodiment is similar to the above touch screen 100 (as shown in FIG. 1A and FIG. 1B ), and the differences between the two are as follows. In thetouch screen 100 of FIG. 1B , thedisplay surface 210 is recessed from theframe 220 of thedisplay 200 . However, in the touch screen of this embodiment, thedisplay surface 210 and the surface of theframe 220 are substantially on the same plane. When using this kind ofdisplay 201 , theambient light 72 emitted by the ambient light source 70 (for example, a light source or a reflective light source) easily interferes with the sensing result of theimage sensor 314 . To solve this problem, in this embodiment, each unit time T' further includes a third sub-unit time U3. In the third sub-unit time U3, thecontrol unit 320 is adapted to make both thefirst light source 312a and the secondlight source 312b in the off state. Thecontrol unit 320 is adapted to subtract the image brightness measured by thefirst image sensor 314a in the first subunit time U1 of each unit time T′ from the third subunit U1 of the corresponding unit time T′ by thefirst image sensor 314a. The brightness of the image measured in the unit time U3 to obtain a first touch image. Thecontrol unit 320 is adapted to subtract the image brightness measured by thesecond image sensor 314b in the second subunit time U2 of each unit time T′ from the third subunit U2 of the corresponding unit time T′ by thesecond image sensor 314b. The brightness of the image measured in the unit time U3 to obtain a second touch image. The control unit determines the position of thetouch object 50 relative to the display surface according to the first touch image and the second touch image. In other words, during the third sub-unit time U3, both thefirst image sensor 314a and thesecond image sensor 314b are in the on state. However, in other embodiments, the third sub-unit time U3 may also be divided into two different sub-unit times, and thefirst image sensor 314 a and thesecond image sensor 314 b are turned on during the two different sub-unit times.

由控制单元320将影像亮度相减的方式，便可扣除环境光72所造成的影像，如此仍然能够获得触控物体50的正确位置，而不受环境光72的干扰。此种触控模块300亦可应用于投影屏幕上。由于投影屏幕没有边框，亦容易受到环境光的干扰，而本实施例的触控模块300则可有效解决此问题。此外，本实施例的触控模块300亦可应用于图1A的触控屏幕100中，以解决相对显示面210倾斜的环境光的干扰。The image caused by theambient light 72 can be subtracted by thecontrol unit 320 by subtracting the brightness of the image, so that the correct position of thetouch object 50 can still be obtained without being disturbed by theambient light 72 . Thistouch module 300 can also be applied to a projection screen. Since the projection screen has no frame, it is easily disturbed by ambient light, and thetouch module 300 of this embodiment can effectively solve this problem. In addition, thetouch module 300 of this embodiment can also be applied to thetouch screen 100 in FIG. 1A to solve the interference of ambient light inclined relative to thedisplay surface 210 .

值得注意的是，在其它实施例中，第一、第二及第三子单位时间U1、U2、U3的顺序亦可改变为其它任何可能的顺序。It should be noted that in other embodiments, the order of the first, second and third sub-unit times U1 , U2 , U3 can also be changed to any other possible order.

图4B为图3A的触控模块的控制方法的流程图。请参照图3A、图4A与图4B，本实施例的控制方法与图2B的控制方法类似，而两者的差异如下所述：FIG. 4B is a flow chart of the control method of the touch module in FIG. 3A . Please refer to FIG. 3A, FIG. 4A and FIG. 4B, the control method of this embodiment is similar to the control method of FIG. 2B, and the differences between the two are as follows:

在本实施例中，步骤S110’还包括步阀S116，而步骤S116为在第三子单位时间U3中，使第一光源312a与第二光源312b皆处于关闭状态。另外，在本实施例中，步骤S120’包括步骤S122与步骤S124。步骤S122为将第一影像传感器314a在第一子单位时间U1中所测得的影像亮度减去第一影像传感器314a在第三子单位时间U3中所测得的影像亮度，以获得一第一触控影像。再者，将第二影像传感器314b在第二子单位时间U2中所测得的影像亮度减去第二影像传感器314b在第三子单位时间U3中所测得的影像亮度，以获得一第二触控影像。另外，步阀S124于步骤S122后执行，步骤S124为根据第一触控影像与第二触控影像判断出触控物体50相对于显示面的位置。In this embodiment, step S110' further includes a step S116, and step S116 is to make both thefirst light source 312a and the secondlight source 312b in the off state during the third sub-unit time U3. In addition, in this embodiment, step S120' includes step S122 and step S124. Step S122 is to subtract the image brightness measured by thefirst image sensor 314a in the third sub-unit time U3 from the image brightness measured by thefirst image sensor 314a in the first sub-unit time U1 to obtain a first Touch the image. Furthermore, the image brightness measured by thesecond image sensor 314b in the second sub-unit time U2 is subtracted from the image brightness measured by thesecond image sensor 314b in the third sub-unit time U3 to obtain a second Touch the image. In addition, step S124 is executed after step S122, and step S124 is to determine the position of thetouch object 50 relative to the display surface according to the first touch image and the second touch image.

由将影像亮度相减的方式，便可扣除环境光72所造成的影像，如此仍然能够获得触控物体50的正确位置，而不受环境光72的干扰。此种控制方法亦可应用于投影屏幕上。由于投影屏幕没有边框，亦容易受到环境光的干扰，而本实施例的控制方法则可有效解决此问题。此外，本实施例的控制方法亦可应用于图1A的触控屏幕100中，以解决相对显示面210倾斜的环境光的干扰。The image caused by theambient light 72 can be subtracted by subtracting the brightness of the image, so that the correct position of thetouch object 50 can still be obtained without being disturbed by theambient light 72 . This control method can also be applied to projection screens. Since the projection screen has no frame, it is easily disturbed by ambient light, and the control method of this embodiment can effectively solve this problem. In addition, the control method of this embodiment can also be applied to thetouch screen 100 in FIG. 1A to solve the interference of ambient light inclined relative to thedisplay surface 210 .

图5A为本发明的又一实施例的触控屏幕及作业平台的主视图，图5B为图5A的触控屏幕沿着III-III线的剖面示意图。请参照图5A与图5B，本实施例的触控屏幕102与上述触控屏幕100(如图1A与图1B所绘示)类似，而两者的差异如下所述。在本实施例中，触控模块302还包括至少一吸光条330(图5A中是以三个吸光条330为例)，其配置于显示面210的至少一边上(图5A中是以配置于三边上为例)。吸光条330可吸收原本会打在边框220上的来自光源212的光束313，进而避免边框220所反射的光束313造成对不同触控单元310的影像传感器314的干扰。在另一实施例中，如图5C所绘示，吸光条330亦可以用折光条330a来取代，折光条330a适于将光束313往远离显示面210的方向反射，如此便能够避免边框220所反射的光束313造成对不同触控单元310的影像传感器314的干扰。FIG. 5A is a front view of a touch screen and a working platform according to another embodiment of the present invention, and FIG. 5B is a schematic cross-sectional view of the touch screen in FIG. 5A along line III-III. Please refer to FIG. 5A and FIG. 5B , thetouch screen 102 of this embodiment is similar to the touch screen 100 (as shown in FIG. 1A and FIG. 1B ), and the differences between the two are as follows. In this embodiment, thetouch module 302 further includes at least one light-absorbing strip 330 (three light-absorbingstrips 330 are taken as an example in FIG. 5A ), which are arranged on at least one side of the display surface 210 (in FIG. on three sides as an example). The light-absorbingstrip 330 can absorb thelight beam 313 from the light source 212 that would hit theframe 220 , so as to prevent thelight beam 313 reflected by theframe 220 from interfering with theimage sensors 314 ofdifferent touch units 310 . In another embodiment, as shown in FIG. 5C , thelight absorbing strip 330 can also be replaced by a refractive strip 330a, and the refractive strip 330a is suitable for reflecting thelight beam 313 in a direction away from thedisplay surface 210, so that theframe 220 can be avoided. The reflectedbeam 313 interferes with theimage sensors 314 ofdifferent touch units 310 .

图6A为本发明的再一实施例的触控屏幕及作业平台的主视图，而图6B为图6A的触控屏幕沿着IV-IV线的剖面示意图。请参照图6A与图6B，本实施例的触控屏幕103与上述触控屏幕102(如图5A与图5B所绘示)类似，而两者的差异如下所述。本实施例的触控屏幕103是将图5A与图5B的触控屏幕102的显示器200置换为与图3B相同的显示器201。此外，图5A与图5B的触控模块302的吸光条330是置于边框220所围绕的凹陷222中，但本实施例的触控模块303的吸光条330则是置于边框220的前表面224上。本实施例的吸光条330可吸收平行于显示面210的环境光，以免避环境光干扰影像传感器314的感测结果。FIG. 6A is a front view of a touch screen and a working platform according to another embodiment of the present invention, and FIG. 6B is a schematic cross-sectional view of the touch screen in FIG. 6A along line IV-IV. Please refer to FIG. 6A and FIG. 6B , thetouch screen 103 of this embodiment is similar to the touch screen 102 (as shown in FIG. 5A and FIG. 5B ), and the differences between the two are as follows. In thetouch screen 103 of this embodiment, thedisplay 200 of thetouch screen 102 in FIGS. 5A and 5B is replaced by thesame display 201 as in FIG. 3B . In addition, the light-absorbingstrip 330 of thetouch module 302 in FIG. 5A and FIG. 5B is placed in the recess 222 surrounded by theframe 220 , but the light-absorbingstrip 330 of thetouch module 303 of this embodiment is placed on the front surface of theframe 220 224 on. The light-absorbingstrip 330 of this embodiment can absorb ambient light parallel to thedisplay surface 210 , so as to prevent the ambient light from interfering with the sensing result of theimage sensor 314 .

图7为本发明的另一实施例的触控屏幕及作业平台的主视图，而图8A为图7的控制单元的驱动时间分布图。请参照图7与图8A，本实施例的触控屏幕104与图1A的触控屏幕100类似，而两者的差异如下所述。在本实施例中，触控屏幕104多了两个触控模块310。具体而言，触控模块304还包括一第三影像传感器314c及一第四影像传感器314d，其分别配置于显示面210旁的一第五位置及一第六位置(例如图7所绘示的位置)，在本实施例中，第三影像传感器314c与第四影像传感器314d的感测面315朝向感测空间S。在本实施例中，四个触控模块310分别配置于显示面210的四个角落。然而，在其它实施例中，触控模块310亦可以配置于其它适当的位置。FIG. 7 is a front view of a touch screen and a working platform according to another embodiment of the present invention, and FIG. 8A is a driving time distribution diagram of the control unit in FIG. 7 . Please refer to FIG. 7 and FIG. 8A , thetouch screen 104 of this embodiment is similar to thetouch screen 100 of FIG. 1A , and the differences between the two are as follows. In this embodiment, thetouch screen 104 has twomore touch modules 310 . Specifically, thetouch module 304 further includes athird image sensor 314c and a fourth image sensor 314d, which are respectively arranged at a fifth position and a sixth position beside the display surface 210 (such as shown in FIG. 7 location), in this embodiment, the sensing surfaces 315 of thethird image sensor 314c and the fourth image sensor 314d face the sensing space S. In this embodiment, fourtouch modules 310 are respectively disposed at four corners of thedisplay surface 210 . However, in other embodiments, thetouch module 310 may also be disposed at other appropriate locations.

光源312可还包括至少一第三光源312c(在图7中是以二个第三光源312c为例)及一第四光源312d(在图7中是以二个第四光源312d为例)，其分别配置于显示面210旁的一第七位置及一第八位置(例如图7所绘示的位置)。每一单位时间T”还包括一第四子单位时间U4及一第五子单位时间U5。在第一子单位时间U1中，控制单元324适于还使第三光源312c与第四光源312d处于关闭状态。在第二子单位时间U2中，控制单元324适于还使第三光源312c与第四光源312d处于关闭状态。在第四子单位时间U4中，控制单元324适于使第三光源312c处于开启状态，并使第一、第二及第四光源312a、312b、312d处于关闭状态。在第五子单位时间U5中，控制单元324适于使第四光源处312d于开启状态，并使第一、第二及第三光源312a、312b、312c处于关闭状态。在本实施例中，第一、第二、第三及第四影像传感器314a、314b、314c、314d可分别于第一、第二、第三及第四子单位时间U1、U2、U3、U4中开启并感测影像。然而，在其它实施例中，第一、第二、第三及第四影像传感器314a、314b、314c、314d亦可在每一单位时间T”中的全部时间中接维持开启。Thelight source 312 may further include at least one thirdlight source 312c (in FIG. 7, two thirdlight sources 312c are taken as an example) and a fourthlight source 312d (in FIG. 7, twofourth light sources 312d are taken as an example), They are respectively arranged at a seventh position and an eighth position beside the display surface 210 (such as the position shown in FIG. 7 ). Each unit time T" also includes a fourth sub-unit time U4 and a fifth sub-unit time U5. In the first sub-unit time U1, thecontrol unit 324 is adapted to also make the thirdlight source 312c and the fourthlight source 312d in the Off state. In the second subunit time U2, thecontrol unit 324 is adapted to also make the thirdlight source 312c and the fourthlight source 312d in the off state. In the fourth subunit time U4, thecontrol unit 324 is adapted to make the thirdlight source 312c is in the open state, and makes the first, second and fourthlight sources 312a, 312b, 312d in the closed state.In the fifth sub-unit time U5, thecontrol unit 324 is suitable for making the fourthlight source 312d in the open state, and The first, second and thirdlight sources 312a, 312b, 312c are turned off. In this embodiment, the first, second, third andfourth image sensors 314a, 314b, 314c, 314d can be respectively in the first , the second, the third and the fourth sub-unit time U1, U2, U3, U4 to open and sense images. However, in other embodiments, the first, second, third andfourth image sensors 314a, 314b , 314c, 314d can also be kept open during the whole time of each unit time T".

在实施例中，触控物体50的数量例如为二个，即触控物体50a与触控物体50b。当这些触控物体50在这些单位时间T”的至少其中之一中同时位于感测空间S内时，在此单位时间T”中，第一、第二、第三及第四影像传感器314a、314b、314c、314d所感测到的触控影像中会各自有至少一反光点。举例而言，由于第一影像传感器314a、触控物体50b、触控物体50a及第四影像传感器314d是排列在同一直在线，因此第一影像传感器314a只会感测到触控物体50b所形成的反光点，但不会感测到触控物体50a所形成的反光点。反之，第四影像传感器314d只会感测到触控物体50a所形成的反光点，但不会感测到触控物体50b所形成的反光点。因此第一影像传感器314a与第四影像传感器314d各器只会感测到一个反光点。此外，第一、第二、第三及第四影像传感器314a、314b、314c、314d的至少其中二者所感测到的触控影像中会各自有二个反光点。举例而言，在本实施例中，第二及第三影像传感器314b、314c各自能感测到两个反光点。如此一来，在本实施例中，第一、第二、第三及第四影像传感器314a、314b、314c、314d所输出的四个一维坐标信号中，其中有两个会各自包含两个一维坐标，而另两个则各自包含一个一维坐标。如此一来，便会组合出多于两个的触控物体50的位置，而与实际情况不符合。此外，在通常的情况中，四个一维坐标信号会各自包含二个一维坐标，这会组合出还多与实际情况不符合的位置。In the embodiment, the number of thetouch object 50 is, for example, two, that is, the touch object 50 a and thetouch object 50 b. When the touch objects 50 are simultaneously located in the sensing space S during at least one of the unit times T", in this unit time T", the first, second, third andfourth image sensors 314a, Each of the touch images sensed by 314b, 314c, and 314d has at least one reflective point. For example, since thefirst image sensor 314a, thetouch object 50b, the touch object 50a, and the fourth image sensor 314d are arranged on the same straight line, thefirst image sensor 314a only senses the image formed by thetouch object 50b. The reflective point formed by the touch object 50a will not be sensed. On the contrary, the fourth image sensor 314d only senses the reflective point formed by the touch object 50a, but does not sense the reflective point formed by thetouch object 50b. Therefore, each of thefirst image sensor 314a and the fourth image sensor 314d only senses one light reflection point. In addition, at least two of the first, second, third, andfourth image sensors 314a, 314b, 314c, and 314d sense touch images with two reflective points in each touch image. For example, in this embodiment, each of the second andthird image sensors 314b and 314c can sense two reflective points. Thus, in this embodiment, among the four one-dimensional coordinate signals output by the first, second, third andfourth image sensors 314a, 314b, 314c, 314d, two of them each contain two 1D coordinate, while the other two each contain a 1D coordinate. In this way, more than two positions of thetouch object 50 will be combined, which is inconsistent with the actual situation. In addition, under normal circumstances, each of the four one-dimensional coordinate signals will contain two one-dimensional coordinates, which will combine many positions that do not conform to the actual situation.

为了解决此一问题，控制单元324适于比对这些反光点在这些触控影像中的位置，以剔除这些触控物体50所不存在的相对显示面210的位置，并决定这些触控物体50相对显示面的位置。换言之，控制单元324在接收四个一维坐标信号且由此运算出多个位置的数据后，可取这些数据的交集者来当作触控物体50的实际位置，而其它数据则予以剔除。如此一来，本实施例的触控屏幕104及触控模块304便能够准确判断出双触控物体50的位置。根据这样的原理，便能够实现多点触控。此外，随着触控点的增加(例如增加至三个以上)，本发明的其它实施例亦可采用还多的触控单元310来准确判断出还多点的触控。In order to solve this problem, thecontrol unit 324 is adapted to compare the positions of these reflective points in the touch images, so as to eliminate the positions of the touch objects 50 that do not exist relative to thedisplay surface 210, and determine the touch objects 50 Position relative to the display surface. In other words, after thecontrol unit 324 receives the four one-dimensional coordinate signals and calculates the data of multiple positions, the intersection of these data can be taken as the actual position of thetouch object 50 , and other data can be discarded. In this way, thetouch screen 104 and thetouch module 304 of this embodiment can accurately determine the position of the dual-touch object 50 . According to such a principle, multi-touch can be realized. In addition, with the increase of touch points (for example, increased to more than three), other embodiments of the present invention can also usemore touch units 310 to accurately determine more touch points.

值得注意的是，本实施例的触控屏幕104及触控模块304不仅适用于判断双触控物体50的位置。假设在只有单一的触控物体50进入感测空间S的情况下，四个影像传感器314所传出的四个一维坐标信号只会让控制单元324运算出一个位置，此时控制单元便不须剔除其它与实际状况不吻合的位置数据。再者，在另一实施例中，亦可以将四个触控单元310分成二组，例如图7中上方两个触控单元310为一组，而图7中下方两个触控单元为另一组。此外，在第一子单位时间U1时同时开启上方那一组触控单元310的光源312a与312b，并同时关闭下方那一组触控单元310的光源312c与312d。再者，在第二子单位时间U2时同时开启下方那一组触控单元310的光源312c与312d，并同时关闭上方那一组触控单元310的光源312a与312b。只要由光源312位置的设计，而使上方那一组触控单元310的光源312所发出的光束313不要或几乎不直射彼此的影像传感器314，且使下方那一组触控单元310的光源312所发出的光束313不要或几乎不直射彼此的影像传感器314，如此同样能够达到正确判断触控物体50的位置的功效。It should be noted that thetouch screen 104 and thetouch module 304 of this embodiment are not only suitable for determining the position of the dual-touch object 50 . Assuming that only asingle touch object 50 enters the sensing space S, the four one-dimensional coordinate signals sent by the fourimage sensors 314 will only allow thecontrol unit 324 to calculate a position, and the control unit will not Other location data that do not match the actual situation must be eliminated. Furthermore, in another embodiment, the fourtouch units 310 can also be divided into two groups, for example, the upper twotouch units 310 in FIG. 7 form one group, while the lower two touch units in FIG. A group. In addition, at the first sub-unit time U1, thelight sources 312a and 312b of the upper group oftouch units 310 are simultaneously turned on, and thelight sources 312c and 312d of the lower group oftouch units 310 are simultaneously turned off. Furthermore, at the second sub-unit time U2, thelight sources 312c and 312d of the lower group oftouch units 310 are simultaneously turned on, and thelight sources 312a and 312b of the upper group oftouch units 310 are simultaneously turned off. As long as the position of thelight source 312 is designed, the light beams 313 emitted by thelight sources 312 of the upper group oftouch units 310 do not need or hardly hit each other’simage sensors 314 directly, and thelight sources 312 of the lower group oftouch units 310 The emittedlight beams 313 do not or hardly hit each other'simage sensors 314 directly, so that the effect of correctly determining the position of thetouch object 50 can also be achieved.

图8B为图7的触控模块的控制方法的流程图。请参照图7、图8A与图8B，本实施例的控制方法与图2B的控制方法类似，而两者的差异如下所述。在步骤S110”的步骤S112”中，即在第一子单位时间U1中，还使第三光源312c与第四光源312d处于关闭状态。在步骤S114”中，即在第二子单位时间U2中，还使第三光源312c与第四光源312d处于关闭状态。此外，步骤S110”还包括步骤S116”与步骤S118”。在步骤S116”中，即在第四子单位时间U4中，使第三光源312c处于开启状态，并使第一、第二及第四光源312a、312b、312d处于关闭状态。在步骤S118”中，即在第五子单位时间U5中，使第四光源312d处于开启状态，并使第一、第二及第三光源312a、312b、312c处于关闭状态。在本实施例中，触控物体50的数量例如为二个。当这些触控物体50在这些单位时间T”的至少其中之一中同时位于感测空间S内时，在此单位时间T”中，第一、第二、第三及第四影像传感器314a、314b、314c、314d所感测到的触控影像中可各自有至少一反光点，且第一、第二、第三及第四影像传感器314a、314b、314c、314d的至少其中二者所感测到的触控影像中可各自有二个反光点。因此，在本实施例中，步骤S120”还包括比对这些反光点在这些触控影像中的位置，以剔除这些触控物体50所不存在的相对显示面210的位置，并决定这些触控物体50相对显示面210的位置。如此一来，本实施例的控制方法便能够准确判断出双触控物体50的位置。FIG. 8B is a flow chart of the control method of the touch module in FIG. 7 . Please refer to FIG. 7 , FIG. 8A and FIG. 8B , the control method in this embodiment is similar to the control method in FIG. 2B , and the differences between the two are as follows. In step S112" of step S110", that is, in the first sub-unit time U1, the thirdlight source 312c and the fourthlight source 312d are also turned off. In step S114", that is, in the second sub-unit time U2, the thirdlight source 312c and the fourthlight source 312d are turned off. In addition, step S110" also includes step S116" and step S118". In step S116", that is, in the fourth sub-unit time U4, the thirdlight source 312c is turned on, and the first, second and fourthlight sources 312a, 312b, 312d are turned off. In step S118" , that is, in the fifth sub-unit time U5, the fourthlight source 312d is turned on, and the first, second and thirdlight sources 312a, 312b, 312c are turned off. In this embodiment, the number of touch objects 50 is, for example, two. When the touch objects 50 are simultaneously located in the sensing space S during at least one of the unit times T", in this unit time T", the first, second, third andfourth image sensors 314a, The touch images sensed by 314b, 314c, and 314d may each have at least one reflective point, and at least two of the first, second, third, andfourth image sensors 314a, 314b, 314c, and 314d sense Each of the touch images can have two reflective points. Therefore, in this embodiment, step S120″ also includes comparing the positions of these reflective points in these touch images, so as to eliminate the positions of these touch objects 50 that do not exist relative to thedisplay surface 210, and determine these touch points. The position of theobject 50 relative to thedisplay surface 210. In this way, the control method of this embodiment can accurately determine the position of the dual-touch object 50.

本发明并不限定触控屏幕所采用的触控单元310的数量为二个或四个，在其它实施例中，亦可采用其它数量的触控单元310，以下举一实施例来加以说明。The present invention does not limit the number oftouch units 310 used in the touch screen to two or four. In other embodiments, other numbers oftouch units 310 may also be used. An example is given below for illustration.

图9为本发明的又一实施例的触控屏幕及作业平台的主视图。请参照图9，本实施例的触控屏幕105与图7的触控屏幕104类似，而两者的差异如下所述。在本实施例中，触控模块305仅具有三个触控单元310，而其中一个触控单元310位于显示面210的底边上。本实施例的控制单元325的功能与控制方法类似于图7、图8A与图8B的实施例。举例而言，控制单元325可轮流驱动三个触控单元310的光源312。此外，控制单元325可整合三个触控单元310的影像传感器314所捕捉到的亮点，剔除不正确的位置数据，以获得双触控物体50的正确位置。此外，本实施例采用三个触控单元310亦有助于提升单触控物体50的位置的判断的准确度。FIG. 9 is a front view of a touch screen and a working platform according to another embodiment of the present invention. Please refer to FIG. 9 , thetouch screen 105 of this embodiment is similar to thetouch screen 104 of FIG. 7 , and the differences between the two are as follows. In this embodiment, thetouch module 305 has only threetouch units 310 , and one of thetouch units 310 is located on the bottom edge of thedisplay surface 210 . The function and control method of thecontrol unit 325 of this embodiment are similar to the embodiments of FIG. 7 , FIG. 8A and FIG. 8B . For example, thecontrol unit 325 can drive thelight sources 312 of the threetouch units 310 in turn. In addition, thecontrol unit 325 can integrate the bright spots captured by theimage sensors 314 of the threetouch units 310 to eliminate incorrect position data, so as to obtain the correct position of the dual-touch object 50 . In addition, the use of threetouch units 310 in this embodiment also helps to improve the accuracy of determining the position of the single-touch object 50 .

综上所述，在本发明的实施例的触控屏幕、触控模块及其控制方法中，影像传感器是用以捕捉亮点，即捕捉触控物体的反射光。相较于采用捕捉暗点(即捕捉遮光点)的触控模块，其须由反光条或发光条配置于显示面边缘以形成良好的背光源，本发明的实施例的触控屏幕及触控模块不须加装这些反光条或发光条，因此结构较为简单，且有助于降低触控屏幕及触控模块的成本，且亦可使触控屏幕较为美观。To sum up, in the touch screen, the touch module and the control method thereof according to the embodiments of the present invention, the image sensor is used to capture the bright spot, that is, capture the reflected light of the touch object. Compared with the touch module that captures dark spots (that is, captures shading spots), it must be configured with reflective strips or light-emitting strips on the edge of the display surface to form a good backlight. The touch screen and touch panel of the embodiments of the present invention The module does not need to be equipped with these reflective strips or luminous strips, so the structure is relatively simple, and it helps to reduce the cost of the touch screen and the touch module, and also makes the touch screen more beautiful.

此外，在本发明的实施例的触控屏幕、触控模块及其控制方法中，是采用使光源轮流处于开启状态的方法，来避免影像传感器受到不必要的光源所发出的光束的干扰，因此本发明的实施例的触控屏幕、触控模块及其控制方法的误判率较低。In addition, in the touch screen, the touch module and the control method thereof in the embodiment of the present invention, the method of turning on the light source is adopted to prevent the image sensor from being interfered by the light beam emitted by the unnecessary light source, so The misjudgment rate of the touch screen, the touch module and the control method thereof in the embodiments of the present invention is relatively low.

虽然本发明已以实施例具体描述如上，然其并非用以限定本发明，本领域技术人员在不脱离本发明的精神和范围内，当可作些许的还动与润饰，故本发明的保护范围应当以申请的权利要求范围所界定的内容为准。Although the present invention has been specifically described above with examples, it is not intended to limit the present invention. Those skilled in the art may make some modifications and modifications without departing from the spirit and scope of the present invention, so the protection of the present invention The scope should be defined by the scope of the claims of the application.

Claims (34)

1, a kind of touch-control module is applicable to a display, so that this display has touch controllable function, this display has a display surface, and this touch-control module comprises:

One first image sensor is disposed on the other primary importance of this display surface;

One second image sensor is disposed on the other second place of this display surface; And

One control module, be electrically connected to this light source, this first image sensor and this second image sensor, wherein when at least one touch object enters a sensing space before this display surface, this first image sensor and this second image sensor can sense this touch object institute beam reflected, and this light beam that this control module is suitable for sensing according to this first image sensor and this second image sensor this touch object reflection is judged the position of this touch object with respect to this display surface.

2, touch-control module as claimed in claim 1 wherein, comprises at least one light source, is disposed at by this display surface, and is suitable for sending this light beam that enters this sensing space.

3, touch-control module as claimed in claim 2, wherein, this at least one light source comprises one first light source and a secondary light source, be disposed at this display surface other one the 3rd position and one the 4th position respectively, this control module is suitable for this first light source of Sustainable Control and this secondary light source in a plurality of continuous unit interval, each this unit interval comprises one first subunit time and one second subunit time, in this first subunit time, this control module is suitable for making this first light source to be in opening, and make this secondary light source be in closed condition, in this second subunit time, this control module is suitable for making this first light source to be in closed condition, and makes this secondary light source be in opening.

4, touch-control module as claimed in claim 3, wherein, in this first subunit time, this control module is suitable for making this first image sensor to be in opening, and make this second image sensor be in closed condition, in this second subunit time, this control module is suitable for making this first image sensor to be in closed condition, and is suitable for making this second image sensor to be in opening.

5, touch-control module as claimed in claim 3, wherein, the per unit time comprised for one the 3rd subunit time, at the 3rd subunit in the time, this control module is suitable for making this first light source and this secondary light source all to be in closed condition, this control module be suitable for this first image sensor each should be in this first subunit time of unit interval measured image brilliance deduct this first image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one first touch-control image, and control module be suitable for this second image sensor each should be in this second subunit time of unit interval measured image brilliance deduct this second image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one second touch-control image, this control module is judged the position of this touch object with respect to this display surface according to this first touch-control image and this second touch-control image.

6, touch-control module as claimed in claim 3, wherein, the 3rd position and the 4th position are dropped on respectively by the two adjacent corners of this display surface.

7, touch-control module as claimed in claim 6, wherein, this primary importance is with by the identical corner of this display surface is dropped in the 3rd position, and this second place is with by the identical corner of this display surface is dropped in the 4th position.

8, touch-control module as claimed in claim 3, wherein, comprise one the 3rd image sensor and one the 4th image sensor, be disposed at this display surface other one the 5th position and one the 6th position respectively, and the sensing face of the 3rd image sensor and the 4th image sensor is towards this sensing space, wherein this at least one light source comprises one the 3rd light source and one the 4th light source, be disposed at this display surface other one the 7th position and a 8 positions respectively, each this unit interval comprises one the 4th subunit time and one the 5th subunit time, in this first subunit time, this control module is suitable for making the 3rd light source and the 4th light source to be in closed condition, in this second subunit time, this control module is suitable for making the 3rd light source and the 4th light source to be in closed condition, at the 4th subunit in the time, this control module is suitable for making the 3rd light source to be in opening, and make this first, the second and the 4th light source is in closed condition, at the 5th subunit in the time, this control module is suitable for making the 4th light source to be in opening, and make this first, second and third light source is in closed condition.

9, touch-control module as claimed in claim 8, wherein, this at least one touch object is two touch objects, when those touch objects those unit interval be positioned at this sensing space simultaneously in one of them at least the time, in this unit interval, this is first years old, second, can each have at least one reflective spot in the touch-control image that the 3rd and the 4th image sensor is sensed, and this is first years old, second, at least wherein can each have two reflective spots in the touch-control image that the two sensed of the 3rd and the 4th image sensor, and this control module is suitable for comparing the position of those reflective spots in those touch-control images, with reject those touch objects the position of non-existent relatively this display surface, and determine those touch objects position of this display surface relatively.

10, touch-control module as claimed in claim 1, wherein, this first image sensor and this second image sensor should all be maintained at opening in the All Time in the unit interval at each.

11, touch-control module as claimed in claim 1, wherein, this primary importance and this second place drop on respectively by the two adjacent corners of this display surface.

12, touch-control module as claimed in claim 1 wherein, comprises at least one extinction bar or at least one refractive power bar, is disposed on one side at least of this display surface, and wherein this refractive power bar is suitable for this light beam toward the direction reflection away from this display surface.

13, a kind of touch-control module is applicable to a display, so that this display has touch controllable function, this display has a display surface, and this touch-control module comprises:

One first image sensor is disposed on the other primary importance of this display surface;

One second image sensor is disposed on the other second place of this display surface;

One first light source is disposed on one the 3rd other position of this display surface, and is suitable for sending the light that enters the preceding sensing space of this display surface;

One secondary light source is disposed on one the 4th other position of this display surface, and is suitable for sending and enters the light that this sensing space is sent out; And

One control module, be electrically connected to this first light source, this secondary light source, this first image sensor and this second image sensor, wherein this control module is suitable for this first light source of Sustainable Control and this secondary light source in a plurality of continuous unit interval, each this unit interval comprises one first subunit time and one second subunit time, in this first subunit time, this control module is suitable for making this first light source to be in opening, and make this secondary light source be in closed condition, in this second subunit time, this control module is suitable for making this first light source to be in closed condition, and make this secondary light source be in opening, when at least one touch object enters this sensing space, this first image sensor and this second image sensor can sense the image of this touch object, and this control module is suitable for judging the position of this touch object with respect to this display surface according to the image that this first image sensor and this second image sensor are sensed.

14, touch-control module as claimed in claim 13, wherein, in this first subunit time, this control module is suitable for making this first image sensor to be in opening, and make this second image sensor be in closed condition, in this second subunit time, this control module is suitable for making this first image sensor to be in closed condition, and is suitable for making this second image sensor to be in opening.

15, touch-control module as claimed in claim 13, wherein, the per unit time comprised for one the 3rd subunit time, at the 3rd subunit in the time, this control module is suitable for making this first light source and this secondary light source all to be in closed condition, this control module be suitable for this first image sensor each should be in this first subunit time of unit interval measured image brilliance deduct this first image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one first touch-control image, and control module be suitable for this second image sensor each should be in this second subunit time of unit interval measured image brilliance deduct this second image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one second touch-control image, this controller is judged the position of this touch object with respect to this display surface according to this first touch-control image and this second touch-control image.

16, touch-control module as claimed in claim 13, wherein, the 3rd position and the 4th position are dropped on respectively by the two adjacent corners of this display surface.

17, touch-control module as claimed in claim 16, wherein, this primary importance is with by the identical corner of this display surface is dropped in the 3rd position, and this second place is with by the identical corner of this display surface is dropped in the 4th position.

18, touch-control module as claimed in claim 13, wherein, this first image sensor and this second image sensor should all be maintained at opening in the All Time in the unit interval at each.

19, a kind of control method, be suitable for controlling a touch-control module, this touch-control module is applicable to a display, this display has a display surface, this touch-control module comprises one first image sensor and one second image sensor, this first image sensor and this second image sensor are disposed at this display surface other a primary importance and a second place respectively, and this control method comprises:

During a sensing space before at least one touch object enters this display surface, make this first image sensor and this second image sensor sense this touch object institute beam reflected; And

This light beam that senses this touch object reflection according to this first image sensor and this second image sensor is judged the position of this touch object with respect to this display surface.

20, control method as claimed in claim 19, wherein, this touch-control module comprises one first light source and a secondary light source, be disposed at this display surface other one the 3rd position and one the 4th position respectively, this control method is suitable for this first light source of Sustainable Control and this secondary light source in a plurality of continuous unit interval, wherein each this unit interval comprises one first subunit time and one second subunit time, and this control method comprises:

In this first subunit time, make this first light source be in opening, and make this secondary light source be in closed condition; And

In this second subunit time, make this first light source be in closed condition, and make this secondary light source be in opening.

21, control method as claimed in claim 20 is suitable for this first image sensor of Sustainable Control and this second image sensor in those continuous unit interval, and wherein this control method comprises:

In this first subunit time, make this first image sensor be in opening, and make this second image sensor be in closed condition; And

In this second subunit time, make this first image sensor be in closed condition, and make this second image sensor be in opening.

22, control method as claimed in claim 20, wherein, the per unit time comprised for one the 3rd subunit time, this control method comprises:

In time, make this first light source and this secondary light source all be in closed condition at the 3rd subunit;

With this first image sensor each should be in this first subunit time of unit interval measured image brilliance deduct this first image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one first touch-control image;

With this second image sensor each should be in this second subunit time of unit interval measured image brilliance deduct this second image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one second touch-control image; And

Judge the position of this touch object according to this first touch-control image and this second touch-control image with respect to this display surface.

23, control method as claimed in claim 20, wherein, this touch-control module comprises one the 3rd image sensor and one the 4th image sensor, be disposed at this display surface other one the 5th position and one the 6th position respectively, this at least one light source comprises one the 3rd light source and one the 4th light source, be disposed at this display surface other one the 7th position and a 8 positions respectively, each this unit interval comprises one the 4th subunit time and one the 5th subunit time, this control method is suitable for Sustainable Control the 3rd light source in those continuous unit interval, the 4th light source, the 3rd image sensor and the 4th image sensor, this control method comprises:

In this first subunit time, make the 3rd light source and the 4th light source be in closed condition;

In this second subunit time, make the 3rd light source and the 4th light source be in closed condition;

In time, make the 3rd light source be in opening at the 4th subunit, and make this first, second and the 4th light source be in closed condition; And

In time, make the 4th light source be in opening at the 5th subunit, and make this first, second and third light source be in closed condition.

24, control method as claimed in claim 23, wherein, this at least one touch object is two touch objects, when those touch objects those unit interval be positioned at this sensing space simultaneously in one of them at least the time, in this unit interval, can each have at least one reflective spot in the touch-control image that this first, second, third and the 4th image sensor is sensed, and can each have two reflective spots in the touch-control image that at least wherein the two sensed of this first, second, third and the 4th image sensor, and this control method comprises:

Compare the position of those reflective spots in those touch-control images, with reject those touch objects the position of non-existent relatively this display surface, and determine those touch objects position of this display surface relatively.

25, control method as claimed in claim 19 wherein, comprises making this first image sensor and this second image sensor should all be maintained at opening in the All Time in the unit interval at each.

26, a kind of control method, be suitable for controlling a touch-control module, this touch-control module is applicable to a display, this display has a display surface, this touch-control module comprises one first light source, one secondary light source, one first image sensor and one second image sensor, this first image sensor and this second image sensor are disposed at this display surface other a primary importance and a second place respectively, and this first light source and this secondary light source are disposed at this display surface other one the 3rd position and one the 4th position respectively, this control method is suitable for this first light source of Sustainable Control and this secondary light source in a plurality of continuous unit interval, each this unit interval comprises one first subunit time and one second subunit time, and this control method comprises:

In this first subunit time, make this first light source be in opening, and make this secondary light source be in closed condition;

In this second subunit time, make this first light source be in closed condition, and make this secondary light source be in opening;

When a touch object enters this sensing space, make the image of this first image sensor and this this touch object of second image sensor sensing; And

Judge the position of this touch object according to the image that this first image sensor and this second image sensor are sensed with respect to this display surface.

27, control method as claimed in claim 26 wherein, is suitable for this first image sensor of Sustainable Control and this second image sensor in those continuous unit interval, and wherein this control method comprises:

In this first subunit time, make this first image sensor be in opening, and make this second image sensor be in closed condition; And

In this second subunit time, make this first image sensor be in closed condition, and make this second image sensor be in opening.

28, control method as claimed in claim 26, wherein, the per unit time comprised for one the 3rd subunit time, this control method comprises:

In time, make this first light source and this secondary light source all be in closed condition at the 3rd subunit;

With this first image sensor each should be in this first subunit time of unit interval measured image brilliance deduct this first image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one first touch-control image;

With this second image sensor each should be in this second subunit time of unit interval measured image brilliance deduct this second image sensor at the 3rd subunit of this unit interval of correspondence measured image brilliance in the time, to obtain one second touch-control image; And

Judge the position of this touch object according to this first touch-control image and this second touch-control image with respect to this display surface.

29, control method as claimed in claim 26 wherein, comprises making this first image sensor and this second image sensor should all be maintained at opening in the All Time in the unit interval at each.

30, a kind of Touch Screen comprises:

One display has a display surface;

At least two touch control units are disposed at by this display surface, and each this touch control unit comprises:

One light source is disposed at by this display surface, and a sensing space that is suitable for before this display surface is sent a light beam; And

One image sensor is disposed at by this display surface, and the sensing face of this image sensor is towards this sensing space, and wherein this image sensor is suitable for catching the bright spot in this sensing space, and produces a signal of video signal; And

One control module is electrically connected to those light sources and those image sensors, and wherein this control module is suitable for receiving those signal of video signal from those image sensors, and judges the position of this bright spot with respect to this display surface according to those signal of video signal.

31, Touch Screen as claimed in claim 30, wherein, this control module is suitable for driving in turn those light sources in those touch control units.

32, Touch Screen as claimed in claim 31, wherein, after this control module is finishing to drive this light source of one of those touch control units, and before opening another this light source that drives those touch control units, this control module is suitable for making those light sources of those touch control units to keep closing, and this control module is suitable for image brilliance that this image sensor with each this touch control unit sensed and deducts at those light sources and keep the image brilliance that sensed when closing when this light source of this touch control unit is driven, obtaining a touch-control image, and judge the position of this bright spot according to this touch-control image.

33, Touch Screen as claimed in claim 30, wherein, this control module comprises:

At least binary signal processor is electrically connected to this image sensors of those touch control units respectively, and wherein each this signal processor is suitable for judging according to the image that this image sensor sensed of correspondence the position of this bright spot, and produces dimension coordinate signal one by one; And

One back-end processor is electrically connected to those signal processors, and wherein this back-end processor is suitable for receiving those one dimension coordinate signals that those signal processors produce, and judges the position of this bright spot with respect to this display surface according to those one dimension coordinate signals.

34, Touch Screen as claimed in claim 30, wherein, this control module is suitable for making those image sensors to catch bright spot in this sensing space repeatedly, and judges the change in location of this bright spot thus.

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