CN115394258A - Auxiliary stereoscopic display system based on multi-zone synchronous control technology - Google Patents
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本申请涉及3D显示技术领域，具体涉及一种基于多区域同步控制技术的辅助式立体显示系统。The present application relates to the technical field of 3D display, in particular to an auxiliary stereoscopic display system based on multi-region synchronous control technology.
背景技术Background technique
当前，2D液晶显示器仍是显示器市场的主流产品。但是观看者对于深度信息的感知在这种显示方式下被忽略了。能够提供深度信息、更贴近人类所生活的三维空间的3D立体显示是当前关于显示研究的热门内容。3D立体显示目前在医疗、教育以及娱乐、影视等行业已经初露头角但还未投入大规模商业使用。人类能感知到立体是因为人的左右眼看到的两幅图像具有一定的视差，这正是3D立体显示的生理基础。3D立体显示目前的发展发向主要有裸眼立体显示和辅助式立体显示两大类。Currently, 2D liquid crystal display is still the mainstream product in the display market. But the viewer's perception of depth information is ignored in this display mode. The 3D stereoscopic display that can provide depth information and is closer to the three-dimensional space in which human beings live is currently a hot topic in display research. 3D stereoscopic display has already emerged in the fields of medical care, education, entertainment, film and television, but has not yet been put into large-scale commercial use. Human beings can perceive three-dimensionality because the two images seen by the left and right eyes of human beings have a certain parallax, which is the physiological basis of 3D stereoscopic display. The current development direction of 3D stereoscopic display mainly includes naked-eye stereoscopic display and auxiliary stereoscopic display.
裸眼立体显示一般是基于视差屏障或者透镜光栅实现的。视差屏障或者透镜光栅可以将左图像投影到观看者的左眼、右图像投影到观看者的右眼，其中左右图像是一对具有视差的立体图像对，这样就能够实现人眼的3D感知。但是，基于视差屏障或透镜光栅的裸眼立体显示通常由于屏障的遮挡或图像焦点模糊以及图像空间分离，屏幕亮度和图像分辨率大大降低。此外，由于视点固定，观看者只能站在与显示器固定的方位和距离处观看立体效果，观看限制很大。Naked-eye stereoscopic display is generally realized based on a parallax barrier or a lenticular grating. The parallax barrier or lens grating can project the left image to the viewer's left eye and the right image to the viewer's right eye, wherein the left and right images are a pair of stereoscopic image pairs with parallax, so that the 3D perception of human eyes can be realized. However, naked-eye stereoscopic displays based on parallax barriers or lenticular gratings usually result in greatly reduced screen brightness and image resolution due to barrier occlusion or image focus blur and image space separation. In addition, due to the fixed viewpoint, the viewer can only watch the stereoscopic effect at a fixed position and distance from the display, and the viewing is very limited.
如申请号CN201610382323.0的专利提供了一种用于裸眼立体显示设备的狭缝光栅及裸眼立体显示设备。采用的狭缝光栅包括基板以及间隔设置于基板上的多个遮光条，遮光条用于遮挡入射光线，狭缝光栅进一步包括位于遮光条之间的透光区域的线栅，线栅用于透射入射光线的第一偏振分量且反射入射光线的与第一偏振分量垂直的第二偏振分量，狭缝光栅设置于背光模组与液晶面板之间。该发明提高了裸眼立体显示的亮度。For example, the patent application number CN201610382323.0 provides a slit grating for a naked-eye stereoscopic display device and a naked-eye stereoscopic display device. The slit grating used includes a substrate and a plurality of light-shielding strips arranged at intervals on the substrate. The light-shielding strips are used to shield incident light. The first polarization component of the incident light is reflected and the second polarization component perpendicular to the first polarization component of the incident light is reflected. The slit grating is arranged between the backlight module and the liquid crystal panel. The invention improves the brightness of naked-eye stereoscopic display.
辅助式立体显示一般需要借助于主动式开关眼镜来实现，依靠主动式开关眼镜来分离左右立体图像对。主动式开关眼镜由两个液晶光学开关组成，开关信号通过交替设置左右镜片的状态(是否可以通过图像)以获得左眼和右眼的独立视图。同一个时刻，只有一只眼睛可以接收到图像，当开关信号频率足够高、左右图像切换足够快时，人眼看到的图像就是立体且连续的了。这种显示方式相比裸眼立体显示，屏幕亮度和图像分辨率有所提高，但是观看者需要佩戴专用的辅助设备，略显累赘，用户体验感较差。并且在使用的过程中，普遍存在闪烁问题，容易造成视疲劳，眩晕等症状。另一方面，辅助式立体显示对于左右图像的时序要求很高，很容易产生串扰。Auxiliary stereoscopic display generally needs to be realized by means of active switch glasses, and the left and right stereo image pairs are separated by active switch glasses. The active switching glasses are composed of two liquid crystal optical switches, and the switching signal alternately sets the state of the left and right lenses (whether the image can be passed through) to obtain independent views of the left and right eyes. At the same time, only one eye can receive the image. When the switching signal frequency is high enough and the left and right images switch fast enough, the image seen by the human eye is three-dimensional and continuous. Compared with naked-eye stereoscopic display, this display method has improved screen brightness and image resolution, but the viewer needs to wear special auxiliary equipment, which is a bit cumbersome and the user experience is poor. And in the process of use, flickering problems are common, which can easily cause visual fatigue, dizziness and other symptoms. On the other hand, the auxiliary stereoscopic display has high requirements on the timing of the left and right images, and crosstalk is likely to occur.
如申请号CN201180032120.4的专利，提供了一种用于借助开关眼镜的辅助式立体显示的背光单元。在背光关闭的第一个时间间隔内，将整组的像素输出到显示系统的显示面板，在整组的像素已经被输出到显示系统的显示面板的第二个时间间隔中，开启背光单元以便照射显示面板。在此方案中，背光的打开和关闭是在帧完全显示之后以及所有像素刷新之前，而不是在像素刷新的过程中动态地设置背光的亮灭。For example, the patent application number CN201180032120.4 provides a backlight unit for auxiliary stereoscopic display by switching glasses. During a first time interval in which the backlight is turned off, the entire group of pixels is output to the display panel of the display system, and in a second time interval in which the entire group of pixels has been output to the display panel of the display system, the backlight unit is turned on so that Illuminate the display panel. In this solution, the backlight is turned on and off after the frame is fully displayed and before all pixels are refreshed, instead of dynamically setting the backlight on and off during the pixel refresh process.
传统的显示器背光源始终处于常亮状态，一些研究采用动态调光技术，根据显示图像的内容，实时调节背光源LED的亮度，在图像较暗的地方，适当调暗LED的亮度，在图案较亮的地方，适当调亮LED的亮度。这种基于像素灰度值的动态调光技术，很容易实现低功耗和高对比度的显示装置，但是依然没有解决辅助式立体显示由于左右图像对不同步而产生的串扰问题。The traditional display backlight is always on. Some studies use dynamic dimming technology to adjust the brightness of the backlight LED in real time according to the content of the displayed image. In places where the image is dark, the brightness of the LED is appropriately dimmed. In a bright place, adjust the brightness of the LED properly. This dynamic dimming technology based on the pixel gray value can easily realize a display device with low power consumption and high contrast, but it still does not solve the crosstalk problem caused by the asynchronous left and right image pairs of the auxiliary stereoscopic display.
如申请号CN201120152193.4的专利提供了一种LED背光的动态调光装置。通过控制电路对图像信号进行处理后，输出控制信号使LED背光系统中的LED上的电流或电压适时变化，从而带来LED的亮度变化，达到了动态背光调节的目的。For example, the patent application number CN201120152193.4 provides a dynamic dimming device for LED backlights. After the image signal is processed by the control circuit, the control signal is output to make the current or voltage on the LED in the LED backlight system change in time, thereby bringing about the brightness change of the LED and achieving the purpose of dynamic backlight adjustment.
由此可见，现有技术存在如下缺点：This shows that prior art has following shortcoming:
(1)裸眼立体显示由于屏障的遮挡或图像焦点模糊以及图像空间分离，亮度和图像分辨率较低，而且对于观看者的观看位置限制较大。(1) The naked-eye stereoscopic display has low brightness and image resolution due to the occlusion of the barrier or the blurring of the image focus and the separation of the image space, and has relatively large restrictions on the viewing position of the viewer.
(2)主动式开关眼镜的同步问题。开关眼镜需要在显示器显示左图像时设置镜片左开右关，在显示器显示右图像时设置镜片左关右开。对于时序要求极为严格，很容易产生串扰。当前市面上的一些主动式开关眼镜和显示器的同步采用红外的方式，眼镜上需要配备红外接收装置。此外，主动式开关眼镜的供电也是一个问题，这就对观看者的观看时长有一定限制。(2) Synchronization problem of active switch glasses. To switch the glasses, it is necessary to set the lenses to open left and right when the display displays the left image, and to set the lenses to open left and right when the display displays the right image. The timing requirements are extremely strict, and crosstalk is easily generated. At present, some active switching glasses and displays on the market use infrared methods for synchronization, and the glasses need to be equipped with infrared receiving devices. In addition, the power supply of the active switching glasses is also a problem, which limits the viewing time of the viewer.
发明内容Contents of the invention
本申请实际解决的技术问题是降低辅助式立体显示设备中由于左右图像不同步而产生的串扰。为解决上述问题，本申请提供一种基于多区域同步控制技术的辅助式立体显示系统。The technical problem actually solved by this application is to reduce the crosstalk caused by the asynchronous left and right images in the auxiliary stereoscopic display device. In order to solve the above problems, the present application provides an auxiliary stereoscopic display system based on multi-region synchronous control technology.
本申请实施例提供一种基于多区域同步控制技术的辅助式立体显示系统，包括：An embodiment of the present application provides an auxiliary stereoscopic display system based on multi-region synchronous control technology, including:
显示系统由多区域背光模块、液晶显示面板、液晶光阀、区域同步控制模块和偏振眼镜组成；多区域背光模块和液晶光阀都有其独有的区域同步控制模块，多区域背光模块的区域同步控制模块的任务是控制多区域背光的刷新时序，液晶光阀的区域同步控制模块的任务是控制液晶光阀的偏振状态；多区域背光模块、液晶显示面板、液晶光阀需要依靠帧同步信号保持三者之间的状态同步，严格约束左右眼的时序；多区域背光模块和液晶光阀根据液晶显示面板的像素刷新规律划分成N×M块区域，液晶显示面板的N×M块显示区域、多区域背光模块的N×M块照明区域、液晶光阀的N×M块开关区域一一对应，照明区域和开关区域在区域同步控制模块的控制下改变区域的状态，以减小图像串扰。The display system consists of a multi-zone backlight module, a liquid crystal display panel, a liquid crystal light valve, a zone synchronous control module and polarized glasses; the multi-zone backlight module and the liquid crystal light valve have their own unique zone synchronization control modules, and the zone of the multi-zone backlight module The task of the synchronization control module is to control the refresh timing of the multi-zone backlight, and the task of the zone synchronization control module of the liquid crystal light valve is to control the polarization state of the liquid crystal light valve; the multi-zone backlight module, the liquid crystal display panel, and the liquid crystal light valve need to rely on the frame synchronization signal Keep the state synchronization between the three and strictly restrict the timing of the left and right eyes; the multi-zone backlight module and the liquid crystal light valve are divided into N×M blocks according to the pixel refresh rule of the liquid crystal display panel, and the N×M block display area of the liquid crystal display panel , The N×M blocks of lighting areas of the multi-zone backlight module, and the N×M blocks of switching areas of the liquid crystal light valve are in one-to-one correspondence. The lighting areas and switching areas change the state of the area under the control of the area synchronization control module to reduce image crosstalk .
多区域背光模块发出的光线透过液晶显示面板下表面的偏振膜，发生一层偏折，液晶显示面板的电压可以控制光线的偏转程度，发生第二层偏折，经过液晶显示面板偏转后的光线会经过液晶显示面板上表面的偏振膜发生第三层偏折，液晶光阀可以控制经过偏振膜通过液晶光阀的出射光线的偏振方向，两种偏振角度的光线通过偏振眼镜分别可以进入观看者的左眼和右眼，形成一幅带有视差的立体图像对，产生立体视图。The light emitted by the multi-zone backlight module passes through the polarizing film on the lower surface of the liquid crystal display panel, and a layer of deflection occurs. The voltage of the liquid crystal display panel can control the degree of light deflection, and the second layer of deflection occurs. The light will pass through the polarizing film on the upper surface of the liquid crystal display panel to be deflected by the third layer. The liquid crystal light valve can control the polarization direction of the outgoing light passing through the polarizing film through the liquid crystal light valve. The light of two polarization angles can be viewed separately through polarizing glasses. The left eye and the right eye of the patient form a stereoscopic image pair with parallax to produce a stereoscopic view.
所述液晶光阀，包括：N×M块分块的光学开关区域，用于控制通过液晶光阀的光线的偏振方向，当控制电压分别为高电平和低电平时，通过液晶光阀的出射光线的偏振方向分别为45°和135°，N×M块分块的光学开关区域都有独立的控制电路，可以独立地设置其驱动电压为高电平或者低电平，从而可以任意设置某一块开关区域的出射的光线的偏振方向为45°或者135°。The liquid crystal light valve includes: an optical switch area divided into N×M blocks, which is used to control the polarization direction of the light passing through the liquid crystal light valve. The polarization directions of the light are 45° and 135° respectively, and the optical switch areas of N×M blocks have independent control circuits, which can independently set the driving voltage to high level or low level, so that a certain level can be set arbitrarily. The polarization direction of the outgoing light from one switch area is 45° or 135°.
所述区域同步控制模块，包括：根据显示区域的状态驱动照明区域和开关区域，用于控制多区域背光模块、液晶显示面板和液晶光阀之间的时序同步，多区域背光模块的区域同步控制模块根据液晶显示面板的显示顺序，控制与显示区域对应的背光灯条在特定的时间打开和关闭，液晶光阀的控制模块根据液晶显示面板的显示顺序，控制与显示区域对应的液晶光阀的开关区域在特定的时间改变偏振状态，照明区域和开关区域状态改变的时序由多区域背光模块、液晶显示面板、液晶光阀三者之间的同步关系确定。The area synchronization control module includes: driving the lighting area and the switch area according to the state of the display area, for controlling the timing synchronization between the multi-area backlight module, the liquid crystal display panel and the liquid crystal light valve, and the area synchronization control of the multi-area backlight module The module controls the backlight bar corresponding to the display area to turn on and off at a specific time according to the display sequence of the liquid crystal display panel, and the control module of the liquid crystal light valve controls the operation of the liquid crystal light valve corresponding to the display area The switching area changes the polarization state at a specific time, and the timing of the state change of the lighting area and the switching area is determined by the synchronous relationship among the multi-area backlight module, the liquid crystal display panel, and the liquid crystal light valve.
所述多区域背光模块、液晶显示面板、液晶光阀需要依靠帧同步信号保持三者之间的状态同步，包括：当帧同步信号到来时，显示器开始显示新一帧的图像，每一帧图像刷新的时间是固定的；接收到帧同步信号之后，显示器等待回显时间之后开始刷新第一块显示区域，当第一块显示区域所有的像素全部完成刷新，即第一块显示区域完成显示之后，第一块背光区域打开，第一块液晶光阀开关区域偏振状态改变，背光模块和液晶光阀模块需要依靠帧同步信号完成与显示区域之间的同步，液晶显示面板显示图像的帧周期为T，回显时间为Δt，那么每一块照明区域或者开关区域比起其上一块照明区域或者开关区域，状态改变的时延为(T-Δt)/(N*M)。The multi-zone backlight module, the liquid crystal display panel, and the liquid crystal light valve need to rely on the frame synchronization signal to keep the state synchronization between the three, including: when the frame synchronization signal arrives, the display starts to display a new frame of image, and each frame of image The refresh time is fixed; after receiving the frame synchronization signal, the display waits for the echo time and starts to refresh the first display area. When all the pixels in the first display area are refreshed, that is, after the first display area is displayed , the first backlight area is turned on, and the polarization state of the first liquid crystal light valve switch area changes. The backlight module and the liquid crystal light valve module need to rely on the frame synchronization signal to complete the synchronization with the display area. The frame period of the image displayed by the liquid crystal display panel is T, the echo time is Δt, then the time delay of each lighting area or switch area compared with the previous lighting area or switch area is (T-Δt)/(N*M).
附图说明Description of drawings
图1是一种基于多区域同步控制技术的辅助式立体显示系统的结构组成示意图；1 is a schematic diagram of the structural composition of an auxiliary stereoscopic display system based on multi-region synchronous control technology;
图2是一种基于多区域同步控制技术的辅助式立体显示系统根据显示区域状态确定开关区域状态和照明区域状态的流程图；Fig. 2 is a flow chart of an auxiliary stereoscopic display system based on multi-area synchronous control technology determining the state of the switching area and the state of the lighting area according to the state of the display area;
图3是一种基于多区域同步控制技术的辅助式立体显示系统的电路结构框图。Fig. 3 is a block diagram of a circuit structure of an auxiliary stereoscopic display system based on multi-region synchronous control technology.
图4是根据显示区域状态确定开关区域状态和照明区域状态的电路结构图。Fig. 4 is a circuit structure diagram for determining the state of the switching area and the state of the lighting area according to the state of the display area.
图5是液晶光阀控制引脚示意图。FIG. 5 is a schematic diagram of liquid crystal light valve control pins.
图6是区域同步控制模块输出的多区域背光控制信号和液晶光阀控制信号的波形图。Fig. 6 is a waveform diagram of the multi-zone backlight control signal and the liquid crystal light valve control signal output by the zone synchronization control module.
具体实施方式Detailed ways
下面通过具体实施方式结合附图对本申请作进一步详细说明。The present application will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.
本实施例提供了一种基于多区域同步控制技术的辅助式立体显示系统。如图3所示，视频源将立体视频数据发送给液晶显示面板，区域控制器根据液晶显示面板是否已经完成显示的显示信号，判断不同显示区域和开关区域的状态。其中，显示区域按照一帧图像像素刷新的规律划分为N×M块，同样，照明区域和开关区域也对应地划分为N×M块。This embodiment provides an auxiliary stereoscopic display system based on multi-region synchronous control technology. As shown in Figure 3, the video source sends the stereoscopic video data to the liquid crystal display panel, and the regional controller judges the status of different display areas and switch areas according to the display signal of whether the liquid crystal display panel has completed display. Wherein, the display area is divided into N×M blocks according to the pixel refresh rule of a frame of image, and similarly, the lighting area and the switch area are also correspondingly divided into N×M blocks.
下面详细介绍液晶显示面板显示一副图像时，一种基于多区域同步控制技术的辅助式立体显示系统的工作过程。The working process of an auxiliary stereoscopic display system based on multi-region synchronous control technology is introduced in detail below when the liquid crystal display panel displays an image.
如图1所示，显示系统的最内侧是多区域背光模块，由N×M块独立的白光LED灯条组成，其上附着有一张偏振膜，多区域背光模块发出的均匀背光经过偏振膜发生第一层偏折，出射光线是某特定方向的线偏振光。液晶显示面板中的液晶分子会根据驱动电压的变化发生不同程度的偏转，造成背光的第二层偏折，由于液晶分子的不规则排列，此时的出射光线的方向也是不规则的。液晶显示面板上表面也附着有一张偏振膜，经过液晶显示面板偏转后的光线会经过液晶显示面板上表面的偏振膜发生第三层偏折，这样，液晶光阀的入射光线就是某特定方向的偏振光了，液晶光阀通过状态切换，一块开关区域在一个特定的时间段只能通过一个方向的偏振光，本实施例中，通过液晶光阀的出射光线在45°和135°之间交替切换，切换状态取决于液晶光阀的控制信号。As shown in Figure 1, the innermost part of the display system is the multi-zone backlight module, which is composed of N×M independent white LED strips, with a polarizing film attached to it, and the uniform backlight emitted by the multi-zone backlight module passes through the polarizing film to generate The first layer is deflected, and the outgoing light is linearly polarized in a specific direction. The liquid crystal molecules in the liquid crystal display panel will be deflected to different degrees according to the change of the driving voltage, causing the second layer of backlight deflection. Due to the irregular arrangement of the liquid crystal molecules, the direction of the outgoing light at this time is also irregular. There is also a polarizing film attached to the upper surface of the liquid crystal display panel. The light deflected by the liquid crystal display panel will be deflected by the third layer of the polarizing film on the upper surface of the liquid crystal display panel. In this way, the incident light of the liquid crystal light valve is in a specific direction. Polarized light, the liquid crystal light valve passes through state switching, a switch area can only pass polarized light in one direction in a specific period of time, in this embodiment, the outgoing light through the liquid crystal light valve alternates between 45° and 135° switching, the switching state depends on the control signal of the liquid crystal light valve.
如图2所示，首先给i，j均赋值为1，表示新一帧的图像正在液晶显示面板上刷新。此时第一个显示区域开始显示，区域同步控制模块判断该区域的状态，如果该显示区域的所有像素均已经刷新完成，即该显示区域完成显示，则打开对应的照明区域，切换开关区域的状态。照明区域的光线会经过光学模块，显示区域开始显示图像，开关区域状态改变将图像投射到观看者的另一只眼睛。接着，i，j的值更新，液晶显示面板开始显示第二个显示区域的内容，当第二个显示区域的所有像素刷新完成时，第二个显示区域对应的照明区域和开关区域的动作与上一个显示区域完成显示时对应的照明区域和开关区域的动作相同，以此类推，直到整个液晶显示面板上的所有像素都刷新完成，就开始显示下一帧的图像。As shown in FIG. 2 , first, i and j are assigned a value of 1, indicating that the image of a new frame is being refreshed on the liquid crystal display panel. At this time, the first display area begins to display, and the area synchronization control module judges the state of this area. If all the pixels in this display area have been refreshed, that is, the display area has completed displaying, then turn on the corresponding lighting area and switch the switch area. state. The light from the lighting area will pass through the optical module, the display area will start to display the image, and the state of the switching area will change to project the image to the viewer's other eye. Then, the values of i and j are updated, and the liquid crystal display panel starts to display the content of the second display area. When all the pixels in the second display area are refreshed, the actions of the lighting area and switch area corresponding to the second display area are the same as When the previous display area finishes displaying, the corresponding lighting area and the switch area have the same actions, and so on, until all the pixels on the entire LCD panel are refreshed, and the image of the next frame starts to be displayed.
如图5所示是液晶光阀的引脚示意图。液晶光阀左右两侧各有一个柔性带，每个柔性带上有若干个引脚。每一侧的引脚都各自分为N×M组，分别是Seg11、Seg12......Seg1M，Seg21、Seg22......Seg2M，......，SegN1、SegN2......SegNM。这N×M组引脚分别控制液晶光阀的N×M块开关区域。每组Seg的控制引脚都需要接±24V的电压，使用正负电压是为了防止液晶极化。Figure 5 is a schematic diagram of the pins of the liquid crystal light valve. There is a flexible strip on the left and right sides of the liquid crystal light valve, and there are several pins on each flexible strip. The pins on each side are divided into N×M groups, namely Seg11, Seg12...Seg1M, Seg21, Seg22...Seg2M,..., SegN1, SegN2. .....SegNM. The N×M groups of pins respectively control the N×M switching areas of the liquid crystal light valve. The control pins of each group of Seg need to be connected to a voltage of ±24V, and the use of positive and negative voltages is to prevent the polarization of the liquid crystal.
以驱动Seg11为例对液晶光阀接线进行说明。找到Seg11在两个柔性带上分别对应的若干个引脚，接入±24V的驱动电压。驱动信号是通过一个FPC转接板之后接到柔性带上，这样，就完成了SEG11的驱动。液晶光阀的驱动需要使用±24V的电压。本实施例通过一个高速电子开关来实现±24V电压输出电路。一个电源模块产生+24V和-24V电压输出，一个高速电子开关将+24V和-24V电压分时输出就可以实现正负电压输出。本实施例中，高速电子开关由两个继电器构成，两个继电器的输出分别为0V或+24V，0V或-24V，分时选择不同的继电器输出就可以形成±24V的控制电压。本实施例采用stm32单片机的GPIO输出作为继电器的控制信号，这样就实现了±24V电压的占空比、周期等的控制。设置N×M个Seg的控制电压时序，就可以达到控制开关区域和照明区域状态和显示区域同步变化的目的。Take driving Seg11 as an example to illustrate the wiring of the liquid crystal light valve. Find the corresponding pins of Seg11 on the two flexible belts, and connect them to the driving voltage of ±24V. The driving signal is connected to the flexible belt after passing through an FPC adapter board, so that the driving of the SEG11 is completed. The driving of the liquid crystal light valve needs to use the voltage of ± 24V. In this embodiment, a ±24V voltage output circuit is implemented through a high-speed electronic switch. A power module generates +24V and -24V voltage output, and a high-speed electronic switch outputs +24V and -24V voltage in time division to realize positive and negative voltage output. In this embodiment, the high-speed electronic switch is composed of two relays. The outputs of the two relays are 0V or +24V, 0V or -24V respectively, and the control voltage of ±24V can be formed by selecting different relay outputs in time-sharing. In this embodiment, the GPIO output of the stm32 single-chip microcomputer is used as the control signal of the relay, so that the control of the duty cycle and period of the ±24V voltage is realized. Setting the control voltage sequence of N×M Segs can achieve the purpose of controlling the state of the switching area and the lighting area and the synchronous change of the display area.
本实施例采用120Hz快速响应的液晶显示面板。根据分时原理，左右眼的刷新率均为60Hz，可流畅地播放视频数据。测量液晶显示面板的回显时间Δt，一帧图像的显示时间8.33ms减去回显时间Δt就是液晶显示面板上图像在刷新的时间，图像刷新时间(8.33ms-Δt)和N×M的比值就是每一块显示区域的刷新时间。那么，第k+1块开关区域或者照明区域相比较第k块开关区域或者照明区域状态改变的时延就是每一块显示区域的刷新时间。In this embodiment, a liquid crystal display panel with a fast response of 120 Hz is used. According to the time-sharing principle, the refresh rate of the left and right eyes is 60Hz, which can play video data smoothly. Measure the echo time Δt of the LCD panel, the display time of a frame of image is 8.33ms minus the echo time Δt is the refresh time of the image on the LCD panel, the ratio of the image refresh time (8.33ms-Δt) to N×M It is the refresh time of each display area. Then, the time delay of the state change of the k+1th switch area or lighting area compared to the kth switch area or lighting area is the refresh time of each display area.
以上内容是结合具体的实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请发明构思的前提下，还可以做出若干简单推演或替换。The above content is a further detailed description of the present application in conjunction with specific implementation modes, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, some simple deduction or replacement can also be made without departing from the inventive concept of the present application.
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