CN102109934A - Touch input device and display device using the same - Google Patents
Touch input device and display device using the sameDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及一种触控输入装置，尤其涉及一种红外线触控输入装置及应用该红外线触控输入装置的显示装置。The present invention relates to a touch input device, in particular to an infrared touch input device and a display device using the infrared touch input device.
背景技术Background technique
触摸屏作为最简单，成熟的多媒体人机交互设备已经得到了广泛的应用。通常在电子装置中均整合有触摸屏装置，其中红外触摸屏技术以其生产工艺简单，生产成本低的优势应用十分广泛。一般的红外触摸屏结构是采用在显示屏的表面边缘框架内，沿显示屏表面的四个边缘按照一定的对应关系设置若干红外接收管和红外发射管。这些红外接收管和红外发射管沿显示屏表面的边缘横向和纵向排列构成一个相互正交的发射接收矩阵阵列。用户在触摸屏幕时，手指会挡住经过该位置的横向与纵向两条红外线，因而可以判断出触摸点在显示屏上的坐标。As the simplest and mature multimedia human-computer interaction device, the touch screen has been widely used. Usually, touch screen devices are integrated in electronic devices, and the infrared touch screen technology is widely used due to its advantages of simple production process and low production cost. The general infrared touch screen structure is adopted in the surface edge frame of the display screen, and several infrared receiving tubes and infrared emitting tubes are arranged according to a certain corresponding relationship along the four edges of the display screen surface. These infrared receiving tubes and infrared emitting tubes are arranged horizontally and vertically along the edge of the display screen to form a mutually orthogonal transmitting and receiving matrix array. When the user touches the screen, the finger will block the two horizontal and vertical infrared rays passing through the position, so the coordinates of the touch point on the display screen can be judged.
然而，目前的红外触摸设备包括大量的红外接收管和红外发射管，会增加电子装置的成本。同时。现有的显示装置越来越轻薄化，显示装置边缘空间随之减小，限制了现有的红外触摸屏在电子装置中的应用。However, current infrared touch devices include a large number of infrared receiving tubes and infrared emitting tubes, which will increase the cost of the electronic device. at the same time. Existing display devices are getting lighter and thinner, and the edge space of the display device is reduced accordingly, which limits the application of existing infrared touch screens in electronic devices.
发明内容Contents of the invention
有鉴于此，本发明提供一种一种体积轻便、具有红外线触控功能的显示装置。In view of this, the present invention provides a light-weight display device with an infrared touch function.
本发明还提供一种红外线触控装置。The invention also provides an infrared touch device.
本发明还提供一种具有前光照明装置和红外线触控功能的反射型显示装置。The invention also provides a reflective display device with a front lighting device and an infrared touch function.
一种具有红外线触控功能的显示装置，包括显示层，一导光板设置于所述显示层上方，所述导光板包括远离显示层第一表面和靠近显示层的第二表面。还包括一基板设置于所述导光板与显示层之间，所述基板上形成有红外线感测器数组，至少一个红外线光源设置在导光板的侧面，所述导光板侧面还设置有至少一个扫描反射镜，以及一处理单元。由红外线光源发出的红外线经扫描反射镜反射后入射到导光板内部，射入导光板内部的光线以各个不同方向在导光板的第一表面和第二表面间反复反射向前传播。当手指触摸导光板时，位于手指下方的红外线感测器接收到红外线信号中断，红外线感测器发送一信号至处理单元，处理单元根据该信号确定触摸位置。A display device with an infrared touch function includes a display layer, a light guide plate is arranged above the display layer, and the light guide plate includes a first surface away from the display layer and a second surface close to the display layer. It also includes a substrate arranged between the light guide plate and the display layer, an array of infrared sensors is formed on the substrate, at least one infrared light source is arranged on the side of the light guide plate, and at least one scanning sensor is arranged on the side of the light guide plate. mirror, and a processing unit. Infrared rays emitted by the infrared light source are reflected by the scanning mirror and then incident into the light guide plate. The light rays entering the light guide plate are repeatedly reflected between the first surface and the second surface of the light guide plate in different directions and travel forward. When the finger touches the light guide plate, the infrared sensor located under the finger receives an interrupted infrared signal, and the infrared sensor sends a signal to the processing unit, and the processing unit determines the touch position according to the signal.
一种红外线触控装置，包括一基板，所述基板上形成有红外线感测器数组。还包括一导光板，所述导光板包括远离基板第一表面和靠近基板的第二表面，至少一个红外线光源设置在导光板的侧面，所述导光板侧面还设置有至少一个扫描反射镜，以及一处理单元。由红外线光源发出的红外线经扫描反射镜反射后入射到导光板内部，射入导光板内部的光线以各个不同方向在导光板的第一表面和第二表面间反复反射向前传播；当手指触摸导光板时，位于手指下方的红外线感测器接收到红外线信号中断，红外线感测器发送一信号至处理单元，处理单元根据该信号确定触摸位置。An infrared touch device includes a substrate on which an array of infrared sensors is formed. It also includes a light guide plate, the light guide plate includes a first surface away from the substrate and a second surface close to the substrate, at least one infrared light source is arranged on the side of the light guide plate, and at least one scanning mirror is arranged on the side of the light guide plate, and a processing unit. The infrared rays emitted by the infrared light source are reflected by the scanning mirror and then incident into the light guide plate, and the light entering the light guide plate is repeatedly reflected and propagated forward between the first surface and the second surface of the light guide plate in different directions; when the finger touches When the light guide plate is turned on, the infrared sensor located under the finger receives an interrupted infrared signal, and the infrared sensor sends a signal to the processing unit, and the processing unit determines the touch position according to the signal.
一种具有前光照明装置和红外线触控功能的反射型显示装置，包括显示层。还包括一导光板设置于所述显示层上方，导光板包括远离显示层第一表面和靠近显示层的第二表面，一扩散板设置于所述导光板与显示层之间，所述扩散板上形成有红外线感测器数组，至少一个红外线光源设置在导光板的侧面，至少一个照明光源设置在导光板的侧面，所述导光板侧面还设置有至少一个扫描反射镜，以及一处理单元。由照明光源发出的光线经扫描反射镜反射后入射到导光板内部，射入导光板内部的光线以各个不同方向在导光板的第一表面和第二表面间反复反射向前传播并折射射入扩散板并扩散至显示层，提供前光照明。由红外线光源发出的红外线经扫描反射镜反射后入射到导光板内部，射入导光板内部的光线以各个不同方向在导光板的第一表面和第二表面间反复反射向前传播，当手指触摸导光板时，位于手指下方的红外线感测器接收到红外线信号中断，红外线感测器发送一信号至处理单元，处理单元根据该信号确定触摸位置。A reflective display device with a front lighting device and an infrared touch function, including a display layer. It also includes a light guide plate disposed above the display layer, the light guide plate includes a first surface away from the display layer and a second surface close to the display layer, a diffusion plate is disposed between the light guide plate and the display layer, the diffusion plate An infrared sensor array is formed on it, at least one infrared light source is arranged on the side of the light guide plate, at least one illumination light source is arranged on the side of the light guide plate, and at least one scanning mirror and a processing unit are arranged on the side of the light guide plate. The light emitted by the illumination source is reflected by the scanning mirror and then incident into the light guide plate. The light incident into the light guide plate is repeatedly reflected between the first surface and the second surface of the light guide plate in different directions, propagates forward and is refracted into the light guide plate. Diffuse the plate and diffuse to the display layer to provide front lighting. The infrared light emitted by the infrared light source is reflected by the scanning mirror and then enters the inside of the light guide plate. The light that enters the inside of the light guide plate is repeatedly reflected and propagated forward between the first surface and the second surface of the light guide plate in different directions. When the finger touches When the light guide plate is turned on, the infrared sensor located under the finger receives an interrupted infrared signal, and the infrared sensor sends a signal to the processing unit, and the processing unit determines the touch position according to the signal.
通过扫描反射镜可以将照明光源发出的光线扫描反射成为在三维空间内具有不同方向的光线后在射入导光板内部。因此光线可以均匀的布满整个导光板。同时扫描反射镜的使用减少了光源的使用数量。The scanning mirror can scan and reflect the light emitted by the illumination light source into light with different directions in three-dimensional space, and then enter the light guide plate. Therefore, the light can evenly cover the entire light guide plate. At the same time, the use of scanning mirrors reduces the number of light sources used.
通过扫描反射镜可以将红外线光源发出的光线扫描反射成为在三维空间内具有不同方向的光线后在射入导光板内部。射入导光板内部的光线以各个不同方向在导光板的第一表面和第二表面间反复反射的向前传播。同时在导光板下方的基板或者扩散板上整合有红外线感测器数组来实现红外线触控功能。The scanning mirror can scan and reflect the light emitted by the infrared light source into light with different directions in the three-dimensional space, and then enter the light guide plate. The light incident into the light guide plate propagates forward through repeated reflection between the first surface and the second surface of the light guide plate in different directions. At the same time, an array of infrared sensors is integrated on the substrate or the diffusion plate under the light guide plate to realize the infrared touch function.
附图说明Description of drawings
图1是本发明第一实施方式的具有红外触摸输入功能的反射型显示装置的横截面示意图。FIG. 1 is a schematic cross-sectional view of a reflective display device with an infrared touch input function according to a first embodiment of the present invention.
图2是本发明第一实施方式的具有红外触摸输入功能的反射型显示装置的红外触摸输入装置结构示意图。FIG. 2 is a schematic structural diagram of an infrared touch input device of a reflective display device with an infrared touch input function according to a first embodiment of the present invention.
图3是本发明第一实施方式的具有红外触摸输入功能的反射型显示装置的导光板结构示意图。3 is a schematic structural view of a light guide plate of a reflective display device with an infrared touch input function according to a first embodiment of the present invention.
图4是本发明第一实施方式的具有红外触摸输入功能的反射型显示装置的横截面光路示意图。4 is a schematic diagram of a cross-sectional optical path of a reflective display device with an infrared touch input function according to a first embodiment of the present invention.
图5是本发明第一实施方式中具有红外触摸输入功能的反射型显示装置的扩散板的结构示意图。FIG. 5 is a schematic structural view of a diffusion plate of a reflective display device with an infrared touch input function in the first embodiment of the present invention.
图6是本发明第二实施方式的具有红外触摸输入功能的反射型显示装置的的结构示意图。FIG. 6 is a schematic structural view of a reflective display device with an infrared touch input function according to a second embodiment of the present invention.
图7是本发明第三实施方式中具有红外线触控输入功能的反射型显示装置的的结构示意图。FIG. 7 is a schematic structural diagram of a reflective display device with an infrared touch input function according to a third embodiment of the present invention.
图8是本发明第四实施方式中具有前光照明装置和红外触摸功能的反射型显示装置结构示意图。FIG. 8 is a schematic structural view of a reflective display device with a front lighting device and an infrared touch function in a fourth embodiment of the present invention.
图9是本发明第四实施方式中具有前光照明装置和红外触摸功能的反射型显示装置的横截面光路示意图。9 is a schematic cross-sectional light path diagram of a reflective display device with a front lighting device and an infrared touch function in a fourth embodiment of the present invention.
主要元件符号说明Description of main component symbols
如下具体实施方式将结合上述附图进一步说明本发明。The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.
具体实施方式Detailed ways
请参考图1，为本发明第一实施方式的具有红外线触控输入功能的反射型显示装置100的结构示意图。反射型显示装置100包括显示层10、导光板20以及电源(图中未示出)。在第一实施方式中，显示层10为电子纸显示屏，包括公共电极11、电泳显示媒质层12以及像素电极13。公共电极11一般设置为整面的ITO电极，像素电极13包括多个相互独立的TFT电极。电泳显示媒质层12通过粘合剂粘合在公共电极11与像素电极13之间。电泳显示媒质层12是双稳态电泳显示媒质，在本实施方式中采用微胶囊式电泳显示媒质。电泳显示媒质层12包括多个微胶囊121，第一电泳粒子122与第二电泳粒子123封装在微胶囊121内，第一电泳粒子122与第二电泳粒子123具有不同的电学和光学特性。第一电泳粒子122与第二电泳粒子123在施加在公共电极11与像素电极13之间的电压形成的电场的驱动下在微胶囊121内发生定向移动，通过对电场方向以及电场强度的控制可以控制其移动方向和移动速度，进而控制显示画面的切换。Please refer to FIG. 1 , which is a schematic structural diagram of a
导光板20根据需要可以选用玻璃基板或者高透光率的塑料基板，本发明优选的导光板20为聚甲基丙烯酸甲酯(PMMA)材料所制成。The
请参考图2，为反射型显示装置100中应用的红外线触控输入装置110的示意图，在本实施方式提供的红外线触控输入装置110中，导光板20为一矩形，导光板20的第一对角21处各设有一个红外线光源31、32。导光板20的第二对角22处各设有一个扫描反射镜41、42，在本实施方式中扫描反射镜41、42为双轴的微机电系统扫描微镜(MEMS Scanning Mirror)。由红外线光源31发出的光线射至扫描反射镜41上，由红外线光源32发出的光线射至扫描反射镜42上，藉由扫描反射镜41、42的反射面的旋转将光线反射至不同的方向形成扫描光线。双轴微机电系统扫描微镜可以将光线扫描反射成为在三维空间内具有不同方向的光线。光线经扫描反射镜41、42反射后从导光板20的侧面的入射区域23射入导光板20内部。由于红外线光源31、32发出的光线经扫描反射镜41、42反射后以不同的入射角度从导光板20的入射区域23射入导光板内部，因此红外光线可以均匀的布满整个导光板20。Please refer to FIG. 2 , which is a schematic diagram of an infrared
请参考图3，导光板20的侧面除用于使扫描反射镜41、42反射的光线射入导光板20的入射区域23外均涂覆有高反射膜70，当红外光线从入射区域23入射至该导光板20内部时，并从导光板20内部发射至涂覆有高反射膜70的侧面区域时，高反射膜70对该些红外光线进行反射，使其重新发射至导光板20内部。该高反射膜70可以是沉积于导光板20侧面的金属镜面反射膜，包含金Au或铝Al或银Ag。Please refer to FIG. 3 , the side of the
请一并参考图4和图5，在导光板20与显示层10之间还设置有透明基板50。从导光板20的入射区域23射入导光板20内部的光线以各个不同方向在导光板20的第一表面24和第二表面25间反复反射，布满整个导光板20。设置在导光板20与显示层10之间的透明基板50上还整合有多个红外线感测器51(IR sensor)。在本实施方式中红外线感测器51可以采用薄膜印刷工艺、半导体制程或微机电制程在透明基板50上依次完成电路层和红外线感应层等的制作，在透明基板50上形成一个红外线感测器51数组，每一红外线感测器51对应一坐标系(例如直角坐标系)中的一坐标。Please refer to FIG. 4 and FIG. 5 together, a
请再次参考图4，射入导光板20内部的光线以各个不同方向在导光板20的第一表面24和第二表面25间反复反射的向前传播，当手指、触控笔等物体触摸导光板20的表面时，反射到导光板20的第一表面24的光线由于手指破坏了全反射条件，从而不再进行全反射向前传输。因此位于手指下方的红外线感测器51则不会接收到红外线信号，从而判断触摸位置。反射型显示装置100还包括一处理单元(未示出)，当手指触摸导光板20时，位于手指下方的红外线感测器51接收到的红外线信号中断，该红外线感测器51在未接收到红外线信号时发送一信号至处理单元，处理单元根据产生该信号的红外线感测器51确定触摸位置。Please refer to FIG. 4 again. The light rays entering the
在其它实施方式中，该触控功能的应用不限于是反射型显示装置。也可是在普通显示装置的显示层上增设该第一实施方式中揭露的通过薄膜印刷工艺、半导体制程或微机电制程形成有红外线感测器数组的基板，导光板，红外线光源以及扫描反射镜来实现红外线触控功能。In other embodiments, the application of the touch function is not limited to reflective display devices. It is also possible to add the substrate with the infrared sensor array, the light guide plate, the infrared light source and the scanning mirror disclosed in the first embodiment through the thin film printing process, semiconductor process or micro-electro-mechanical process on the display layer of the ordinary display device. Realize infrared touch function.
在其它实施方式中，还可是一种红外线触控输入装置，利用一通过薄膜印刷工艺形成有红外线感测器数组的基板，导光板，红外线光源，扫描反射镜以及一处理单元来实现第一实施方式中揭露的红外线触控功能。由红外线光源发出的红外线经扫描反射镜反射后入射到导光板内部，当手指触摸导光板时，位于手指下方的红外线感测器接收到红外线信号中断，红外线感测器发送一信号至处理单元，处理单元根据产生该信号的红外线感测器确定触摸位置。该红外线触控输入装置应用于笔记本计算机的触控输入面板，或者其它电子设备外设的触控输入面板等。In other embodiments, it can also be an infrared touch input device, using a substrate with an array of infrared sensors formed by a thin film printing process, a light guide plate, an infrared light source, a scanning mirror and a processing unit to realize the first implementation The infrared touch function disclosed in the method. The infrared rays emitted by the infrared light source are reflected by the scanning mirror and then incident into the light guide plate. When the finger touches the light guide plate, the infrared sensor located under the finger receives the infrared signal and is interrupted. The infrared sensor sends a signal to the processing unit. The processing unit determines the touch location based on the infrared sensor generating the signal. The infrared touch input device is applied to a touch input panel of a notebook computer, or a touch input panel of other electronic equipment peripherals.
在其它实施方式中，红外线光源以及扫描反射镜也可以不设置于导光板20的对角。红外线光源以及扫描反射镜只需设置于导光板20的侧面，由红外线光源发出的光线经扫描反射镜反射后入射到导光板20内部即可。红外线光源的数量可以根据需要设计为一个或者一个以上，扫描反射镜的数量与红外线光源的数量相同。In other implementation manners, the infrared light source and the scanning mirror may not be arranged at opposite corners of the
请参考图6，为本发明第二实施方式中反射型显示装置(图中未示出)中应用的红外线触控输入装置120的结构示意图。该第二实施方式中的红外线触控输入装置120与第一实施方式中相似，其不同在于，该红外线触控输入装置120中导光板220的第一顶角221处设置有红外线光源321，在导光板220上与第一顶角221相邻的第二顶角222处设置有第一扫描反射镜421，在导光板220上与第二顶角222相邻的第三顶角223处设置有第二扫描反射镜422。在本实施方式中第一扫描反射镜421与第二扫描反射镜422为单轴的微机电系统扫描微镜(MEMS Scanning Mirror)。在本实施方式中，所述第一扫描反射镜421与第二扫描反射镜422的扭转轴相互正交的设置。单轴微机电系统扫描微镜可以将光线扫描反射成为二维平面内具有不同方向的光线。由红外线光源321发出的红外光线射至第一扫描反射镜421上，经第一扫描反射镜421扫描反射后的红外光线再射至第二扫描反射镜422上，藉由第一扫描反射镜421和第二扫描反射镜422的两次反射将光线形成在三维空间内具有不同出射方向的光线。光线经第一扫描反射镜421和第二扫描反射镜422反射后从导光板220的侧面射入导光板内部，从而布满整个导光板220。Please refer to FIG. 6 , which is a schematic structural diagram of an infrared touch input device 120 applied in a reflective display device (not shown) in the second embodiment of the present invention. The infrared touch input device 120 in the second embodiment is similar to that in the first embodiment. A first scanning mirror 421 is provided at the second vertex 222 adjacent to the first vertex 221 on the light guide plate 220 , and a first scanning mirror 421 is provided at the third vertex 223 adjacent to the second vertex 222 on the light guide plate 220 . The second scanning mirror 422 . In this embodiment, the first scanning mirror 421 and the second scanning mirror 422 are uniaxial MEMS scanning mirrors. In this embodiment, the torsion axes of the first scanning mirror 421 and the second scanning mirror 422 are arranged perpendicular to each other. The single-axis MEMS scanning micromirror can scan light and reflect it into light with different directions in a two-dimensional plane. The infrared light emitted by the infrared light source 321 is incident on the first scanning mirror 421, and the infrared light scanned and reflected by the first scanning mirror 421 is then incident on the second scanning mirror 422. The two reflections with the second scanning mirror 422 form the light rays with different outgoing directions in the three-dimensional space. The light is reflected by the first scanning mirror 421 and the second scanning mirror 422 and enters the inside of the light guide plate 220 from the side of the light guide plate 220 , thereby covering the entire light guide plate 220 .
请参考图7，为本发明第三实施方式中反射型显示装置(图中未示出)中应用的红外线触控输入装置130结构示意图。该第三实施方式中的红外线触控输入装置130与第二实施方式中相似，其不同在于，该红外线触控输入装置130中导光板230的第一顶角231处设置有一个红外线光源331和一个第一扫描反射镜431，第三顶角233处设置有一个红外线光源332和一个第一扫描反射镜433，在导光板230上的第二顶角232设置有第二扫描反射镜432，第四顶角234处设置有第二扫描反射镜434。在本实施方式中，第一扫描反射镜431、433与第二扫描反射镜432、434为单轴的微机电系统扫描微镜(MEMSScanning Mirror)，所述第一扫描反射镜431与第二扫描反射镜432的扭转轴相互正交的设置，第一扫描反射镜433与第二扫描反射镜434的扭转轴相互正交。Please refer to FIG. 7 , which is a schematic structural diagram of an infrared
在本实施方式中，由红外线光源331发出的红外线射至第一扫描反射镜431上，经第一扫描反射镜431扫描反射后的红外线再射至第二扫描反射镜432上，籍由第一扫描反射镜431和第二扫描反射镜432的两次反射形成在三维空间内具有不同出射方向的红外线。由红外线光源332发出的红外线射至第一扫描反射镜433上，经第一扫描反射镜433扫描反射后的红外线再射至第二扫描反射镜434上，籍由第一扫描反射镜433和第二扫描反射镜434的两次反射形成在三维空间内具有不同出射方向的红外线。由红外线光源331、332发出的红外线分别经两个单轴扫描反射镜扫描后从导光板230侧面的入射区域203射入导光板内部，从而布满整个导光板230。In this embodiment, the infrared rays emitted by the infrared
请参考图8，为本发明的第四实施方式中反射型显示装置140的结构示意图。在第四实施方式中，该反射型显示装置140同时整合前光照明功能和红外线触控功能。该第四实施方式中的反射型显示装置140与第一实施方式中的结构相似，其不同在于，反射型显示装置140中导光板240的第一顶角241处设置有一个照明光源341和一个红外线光源343，导光板240上与第一顶角241相对的第三顶角243处设置有一个照明光源342和一个红外线光源344。在本实施方式中，照明光源341、342为发光二极管(LED)光源，照明光源341、342也可以采用三个RGB混光的LED作为光源或者直接采用封装好的白光LED封装体。Please refer to FIG. 8 , which is a schematic structural diagram of a
与第一实施方式中相似，导光板240上第二顶角242处设置有一个扫描反射镜441，第四顶角244处设置有扫描反射镜442，在本实施方式中扫描反射镜441、442为双轴的微机电系统扫描微镜(MEMSScanning Mirror)。由照明光源341发出的光线射至扫描反射镜441上，由照明光源342发出的光线射至扫描反射镜442上，藉由扫描反射镜441、442的反射面的旋转将光线反射至不同的方向形成扫描光线，然后从导光板240的侧面的入射区域204射入导光板内部，均匀的布满整个导光板240。由红外线光源343发出的光线射至扫描反射镜441上，由红外线光源344发出的光线射至扫描反射镜442上，光线经扫描反射镜441、442反射后以不同的入射角度从导光板240的入射区域204射入导光板内部，红外光线均匀的布满整个导光板240。Similar to the first embodiment, a
请一并参考图9，与第一实施方式中相似在导光板240与显示层143之间还设置有扩散板540，扩散板540上还整合有多个红外线感测器541。当手指触摸导光板240时，位于手指下方的红外线感测器541接收到的红外线信号中断，从而确定触摸位置。Please refer to FIG. 9 together. Similar to the first embodiment, a
照明光源341发出的光线射至扫描反射镜441上，照明光源342发出的光线射至扫描反射镜442上，藉由扫描反射镜441、442的反射面的旋转将光线反射至不同的方向形成扫描光线，从导光板240的入射区域204射入导光板240内部的光线以各个不同方向在导光板240的第一表面2044和第二表面245间反复反射，布满整个导光板240。部分到达第二表面245的光线还经折射而入射到扩散板540，扩散到显示层143的表面，并经显示层143反射后穿过扩散板540和导光板240进入人的眼睛。The light emitted by the illuminating
导光板240的侧面除用于使扫描反射镜441、442反射的光线射入导光板240的入射区域204外均涂覆有高反射膜740，当红外光线和照明光线从入射区域204入射至该导光板240内部时，并从导光板240内部发射至涂覆有高反射膜740的侧面区域时，高反射膜740对该些光线进行反射，使其重新发射至导光板240内部。该高反射膜740可以是沉积于导光板240侧面的金属镜面反射膜。The side of the
请再次参考图8，优选的，在本实施方式中照明光源341与扫描反射镜441之间以及照明光源342与扫描反射镜442之间还设置有聚光透镜640，用于聚集照明光源341、342发出的光线。照明光源341、342发出的光线经聚光透镜640聚集后再发射至扫描反射镜441、442。在其它实施方式中，照明光源341、342也可以是激光光源等其它光源，当采用激光光源时，由于激光光源本身具有聚旋光性，因此在当采用激光光源的实施方式中不需要增设聚光透镜640或者其它的聚光组件。Please refer to FIG. 8 again. Preferably, in this embodiment, a
在其它实施方式中，照明光源、红外线光源以及扫描反射镜也可以不设置于导光板240的对角。照明光源、红外线光源以及扫描反射镜只需设置于导光板240的侧面，使照明光源以及红外线光源发出的光线经扫描反射镜反射后入射到导光板240内部即可。照明光源的数量可以根据需要设计为一个或者一个以上，红外线光源数量与照明光源的数量相同，每个红外线光源均紧邻一个照明光源设置，并与紧邻的照明光源公用一个扫描反射镜，扫描反射镜的数量与照明光源的数量相同。In other implementation manners, the illumination light source, the infrared light source and the scanning mirror may not be arranged at opposite corners of the
在其它实施方式中，扫面反射镜也可以和第二实施方式中相同，采用两个单轴微机电系统扫描微镜，藉由两个单轴扫描反射镜经过两次反射将照明光线和红外光线形成在三维空间内具有不同出射方向的光线，并射入导光板240。In other embodiments, the scanning mirror can also be the same as in the second embodiment, using two uniaxial microelectromechanical system scanning micromirrors, and the illuminating light and the infrared light can be reflected by the two uniaxial scanning mirrors through two reflections. The light rays form light rays with different outgoing directions in the three-dimensional space, and enter the
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本发明，而并非用作为对本发明的限定，只要在本发明的实质精神范围之内，对以上实施方式所作的适当改变和变化都落在本发明要求保护的范围之内。Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not used as a limitation to the present invention. Alterations and variations are within the scope of the claimed invention.
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