CN102223563A - Liquid crystal display system for three-dimensional image - Google Patents
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明属于图像显示技术领域，涉及三维(3D)影像显示技术，尤其涉及到采用行扫描方式来完成左、右眼相互正交的偏振光图像来实现三维影像显示的液晶显示系统。The invention belongs to the field of image display technology, and relates to three-dimensional (3D) image display technology, in particular to a liquid crystal display system that adopts a line scanning method to complete mutually orthogonal polarized light images of left and right eyes to realize three-dimensional image display.
背景技术Background technique
三维影像显示的基本原理是向观众的左眼和右眼分别传送具有微小视差而互不干扰的图像，通过大脑皮层对两幅图像的合成处理产生三维立体感觉。The basic principle of three-dimensional image display is to transmit images with slight parallax without interfering with each other to the left eye and right eye of the audience respectively, and to generate a three-dimensional stereoscopic feeling through the synthesis and processing of the two images by the cerebral cortex.
在液晶电视上实现三维影像显示的方法有多种，主要分为眼镜型和裸眼型两类。裸眼型是通过贴附在液晶屏表面的光栅或等效于光栅的柱面透镜实现左右眼图像的分离。这种方法的缺点是极大地限制了观看范围。眼镜型的三维影像显示装置分为快门型和偏振图像型。There are many ways to realize three-dimensional image display on LCD TV, which are mainly divided into glasses type and naked eye type. The naked-eye type uses a grating attached to the surface of the LCD screen or a cylindrical lens equivalent to a grating to separate the left and right eye images. The disadvantage of this method is that it greatly limits the viewing range. Glasses-type three-dimensional image display devices are classified into a shutter type and a polarized image type.
快门型三维影像显示装置，例如申请号为97108881的中国专利，采用在显示介质(例如，投影屏幕、各种显示器等)上分时交替显示左眼图像和右眼图像的方法，观众戴上与交替显示的图像频率同步动作的液晶快门眼镜来观看三维图像。该方法存在的缺陷是液晶快门眼镜结构复杂、成本高、重量大而导致佩戴不便。The shutter-type three-dimensional image display device, such as the Chinese patent application number 97108881, adopts the method of time-sharing and alternately displaying the left-eye image and the right-eye image on the display medium (such as a projection screen, various displays, etc.), and the audience wears a Alternately displayed images frequency synchronous operation of liquid crystal shutter glasses to watch three-dimensional images. The disadvantage of this method is that the structure of the liquid crystal shutter glasses is complicated, the cost is high, and the weight is heavy, which makes it inconvenient to wear.
偏振型三维影像显示装置，例如申请号为200680033140的中国专利，采用在液晶屏表面贴一层光学偏振膜，控制光的偏振方向分离左眼和右眼图像，观众佩戴适当偏振眼镜观看三维图像。Polarized 3D image display devices, such as Chinese patent application No. 200680033140, use a layer of optical polarizing film on the surface of the liquid crystal screen to control the polarization direction of light to separate left-eye and right-eye images, and viewers wear appropriate polarized glasses to watch 3D images.
现有三维成像技术及显示装置多存在技术复杂，生产和使用不便，成本高以及三维成像效果不佳的问题。例如：美国纽鲁克公司申请号为200580039824.9的中国专利申请中提供了一种利用复合投射型LCD面板的三维成像系统和相关方法，该方法采用至少两层叠置液晶单元，使用该复合LCD面板来显示在面板内相对于观众的不同距离上彼此叠加的至少两个计算图像，结合合适的三维图像产生系统在一个或多个观看区域内产生连续的三维图像。但是该方法的三维图像产生系统设计复杂，且采用在空间上彼此叠加计算图像的技术，不能产生明显差异的双目图像。Most of the existing three-dimensional imaging technologies and display devices have the problems of complex technology, inconvenient production and use, high cost and poor three-dimensional imaging effect. For example: in the Chinese patent application No. 200580039824.9 of Nuruk Corporation of the United States, a three-dimensional imaging system and related methods using composite projection LCD panels are provided. The method uses at least two layers of stacked liquid crystal units, and uses the composite LCD panel to At least two computed images are displayed superimposed on each other within the panel at different distances relative to the viewer, in conjunction with a suitable three-dimensional image generation system to produce a continuous three-dimensional image within one or more viewing areas. However, the design of the three-dimensional image generation system of this method is complex, and the technology of superimposing the calculated images on each other in space cannot produce binocular images with obvious differences.
为了得到良好的三维影像显示效果，必须保证观众的左眼只能观察到左眼图像、右眼只能观察到右眼图像。如果左眼图像能够进入观众右眼、左眼图像能够进入观众左眼，就回产生左右眼图像的串扰和混乱。即使是左右眼图像的串扰和混乱只是瞬时现象，也会造成三维影像得不到正确显示；同时会造成观众眼睛不适，严重时更会影像人体身体健康。In order to obtain a good three-dimensional image display effect, it must be ensured that the viewer's left eye can only observe the left-eye image, and the right eye can only observe the right-eye image. If the left eye image can enter the audience's right eye, and the left eye image can enter the audience's left eye, crosstalk and confusion between the left and right eye images will occur. Even if the crosstalk and confusion of the left and right eye images is only a transient phenomenon, it will cause the 3D image to not be displayed correctly; at the same time, it will cause discomfort to the eyes of the audience, and even affect the health of the human body in severe cases.
北京京东方光电科技有限公司申请号为200810103607.7的中国专利申请中提供了一种用于三维影像显示装置的开关面板和相应的检偏眼镜。该开关面板与液晶显示装置偏振画像的出射侧贴合设置，包括两块透明基板，其相对的表面上分别涂覆有电极，其间填充液晶层，且其两侧分别布设有取向槽相互垂直的取向膜。采用液晶二次旋光技术实现三维成像。但是，该专利只考虑了显示屏的整屏为左眼图像与显示屏整屏为右眼图像两种状态对所述开关面板进行开关切换，而对于显示屏正常扫描下，屏的上下部分分别为左眼图像、右眼图像的情况下无法让所述开关面板做出响应，导致该专利没有最终解决左右眼图像相互串扰和混乱的问题。The Chinese patent application of Beijing BOE Optoelectronics Technology Co., Ltd. with application number 200810103607.7 provides a switch panel for a three-dimensional image display device and corresponding analyzer glasses. The switch panel is attached to the output side of the polarized image of the liquid crystal display device, and includes two transparent substrates, the opposite surfaces are respectively coated with electrodes, and the liquid crystal layer is filled in between, and the two sides are arranged with orientation grooves perpendicular to each other. Alignment film. Three-dimensional imaging is realized by liquid crystal secondary optical rotation technology. However, this patent only considers that the entire screen of the display screen is the left-eye image and the entire screen of the display screen is the right-eye image to switch the switch panel. For the normal scanning of the display screen, the upper and lower parts of the screen are respectively In the case of images for the left eye and images for the right eye, the switch panel cannot be made to respond, resulting in that the patent does not finally solve the problem of mutual crosstalk and confusion between left and right eye images.
青岛海信电器股份有限公司申请号为200910205678.2的申请提供了一种采用左右眼同步开关眼镜的方式来合成三维影像的方法，该方法分别将显示屏的左、右眼图像倍频，如图9所示，使之连续显示多帧左眼图像以后切换至右眼图像，再连续显示多帧右眼图像之后重新切换至左眼图像，如此反复不已，并且在左、右眼图像切换的那一帧关闭背部发光二极管照明，于是左、右眼图像的串扰的帧不会进入观看者的双眼，进而得到正确的三维图像。该方法虽然解决了左右眼图像串扰的问题，然而由于显示帧的反复关闭，使得画面闪烁、亮度下降，对显示器背光的寿命也有一定的影响。The application number of Qingdao Hisense Electric Co., Ltd. is 200910205678.2, which provides a method of synchronously switching glasses on and off for the left and right eyes to synthesize three-dimensional images. display, so that it continuously displays multiple frames of left-eye images and then switches to the right-eye image, then continuously displays multiple frames of right-eye images and then switches back to the left-eye image, and so on, and at the frame where the left-eye and right-eye images switch Turn off the back light-emitting diode lighting, so the frame of the crosstalk of the left and right eye images will not enter the eyes of the viewer, so as to obtain a correct three-dimensional image. Although this method solves the problem of image crosstalk between the left and right eyes, due to the repeated closing of the display frame, the screen flickers and the brightness decreases, which also has a certain impact on the life of the display backlight.
发明内容Contents of the invention
本发明提供一种三维影像液晶显示系统。所述显示系统能够在液晶显示器正常的扫描频率下为左、右眼提供相互正交的偏振光图像来实现三维影像显示，同时能够消除左右眼图像相互串扰和混乱的问题。The invention provides a three-dimensional image liquid crystal display system. The display system can provide mutually orthogonal polarized light images for the left and right eyes at the normal scanning frequency of the liquid crystal display to realize three-dimensional image display, and at the same time can eliminate the problems of crosstalk and confusion between left and right eye images.
本发明技术方案如下：Technical scheme of the present invention is as follows:
一种三维影像液晶显示系统，如图4所示，包括液晶显示器100、偏振态扫描控制面板400和偏振眼镜800；所述偏振态扫描控制面板400贴合于所述显示器100表面，所述偏振眼镜800的左、右镜片的透光偏振态相互正交；所述偏振态扫描控制面板400为条状透明电极驱动的液晶盒，具有与所述显示器相同的外形尺寸，其条状透明电极数量与所述显示器的行扫描电极数量相同、一一对应且相互平行。A three-dimensional image liquid crystal display system, as shown in Figure 4, includes a
上述三维影像液晶显示系统中，所述偏振眼镜800左、右镜片相互正交的透光偏振态同时为线偏振光透光态或圆偏振光(包括左旋圆偏振光或右旋圆偏振光)透光态。In the above-mentioned three-dimensional image liquid crystal display system, the
上述三维影像液晶显示系统中，所述条状透明电极驱动的液晶盒(如图5所示)，是在液晶盒上增加条状透明驱动电极而成。其中液晶盒由两块透明基板和它们之间所封装的液晶层440所构成，第一透明基板410与液晶层440接触的表面具有第一取向膜430，第二透明基板470与液晶层440接触的表面具有第二取向膜450；所增加的条状透明驱动电极位于透明基板和取向膜之间，其中第一条状透明驱动电极420位于第一透明基板410和第一取向膜430之间，第二条状透明驱动电极460位于第二透明基板470和第二取向膜450之间。In the above-mentioned three-dimensional image liquid crystal display system, the liquid crystal cell driven by strip-shaped transparent electrodes (as shown in FIG. 5 ) is formed by adding strip-shaped transparent driving electrodes on the liquid crystal cell. Wherein the liquid crystal cell is made of two transparent substrates and a
上述条状透明电极驱动的液晶盒中，所述液晶层440材料可采用TN型(即扭曲向列型)液晶、HTN型(即高扭曲向列型)液晶或STN型(即超扭曲向列型)液晶。当使用TN结构的液晶时，本领域中的技术人员应当知道，TN结构的液晶盒中的液晶呈90扭曲：在未加电的电极部分所透过的线偏振光的偏振面旋转90°，而加电的电极部分所透过的线偏振光的偏振面不发生偏转。In the above-mentioned liquid crystal cell driven by strip-shaped transparent electrodes, the material of the
上述三维影像液晶显示系统中，在所述条状透明电极驱动的液晶盒表面还可增加四分之一波片。本领域中的技术人员应当知道，在液晶盒表面增加四分之一波片后，透过液晶盒表面的偏振光与四分之一波片的快轴方向平行时为右旋偏振光，透过液晶盒表面的偏振光与四分之一波片的慢轴方向平行时为左旋偏振光。这样，扫描面板未加电的电极面积所透过的偏振光与加电的电极面积所透过的偏振光就在左旋、右旋偏振光之间切换。In the above-mentioned three-dimensional image liquid crystal display system, a quarter-wave plate may be added on the surface of the liquid crystal cell driven by the strip-shaped transparent electrodes. Those skilled in the art should know that after a quarter-wave plate is added to the surface of the liquid crystal cell, the polarized light passing through the surface of the liquid crystal cell is right-handed polarized light when it is parallel to the fast axis direction of the quarter-wave plate. When the polarized light passing through the surface of the liquid crystal cell is parallel to the direction of the slow axis of the quarter-wave plate, it is left-handed polarized light. In this way, the polarized light transmitted by the unpowered electrode area of the scanning panel and the polarized light transmitted by the powered electrode area are switched between left-handed and right-handed polarized light.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明在液晶显示器100出射前端设置偏振态扫描控制面板400，对从液晶显示器100射出的线性偏振光按照显示器正常的行扫描频率同步依次进行周期性偏转，使最终出射的图像为匹配显示器行扫描频率且偏振方向周期性变化的线性偏振光(或圆偏振光)，该线性偏振光(或圆偏振光)分别通过与之匹配的偏振眼镜800的左、右镜片提供给用户左眼和右眼接收，在大脑中处理后实现三维影像显示效果。由于从液晶显示器100射出的线性偏振左、右眼图像经振态扫描控制面板400后变成偏振态相互正交的左、右眼图像，再经左、右镜片透光偏振态相互正交的偏振眼镜800分别进入用户左、右眼，使得左眼图像不能进入用户右眼、右眼图像也不能进入用户左眼，从而彻底消除了左、右眼图像相互串扰和混乱的问题。本发明在实现清晰且没有互扰的三维影像显示图像效果的同时，装置本身结构简单成本低，配套使用的偏振眼镜轻便易于使用，使得整个三维影像显示装置易于生产和推广。In the present invention, a polarization state
附图说明Description of drawings
图1为现有液晶显示器结构示意图。FIG. 1 is a schematic structural diagram of a conventional liquid crystal display.
图2为液晶显示器逐行扫描的基本原理示意图一。FIG. 2 is a first schematic diagram of the basic principle of progressive scanning of a liquid crystal display.
图3为液晶显示器逐行扫描的基本原理示意图二。FIG. 3 is a second schematic diagram of the basic principle of progressive scanning of a liquid crystal display.
图4为本发明提供的三维影像液晶显示系统的结构示意图。FIG. 4 is a schematic structural diagram of a three-dimensional image liquid crystal display system provided by the present invention.
图5为本发明提供的三维影像液晶显示系统中偏振态扫描控制面板结构示意图。FIG. 5 is a schematic structural diagram of a polarization state scanning control panel in the three-dimensional image liquid crystal display system provided by the present invention.
图6为本发明提供的三维影像液晶显示系统中偏振态扫描控制面板工作状态示意图。FIG. 6 is a schematic diagram of the working state of the polarization state scanning control panel in the three-dimensional image liquid crystal display system provided by the present invention.
图7为本发明提供的三维影像液晶显示系统中偏振态扫描面板不施加驱动电压时的工作状态示意图。7 is a schematic diagram of the working state of the polarization state scanning panel in the 3D image liquid crystal display system provided by the present invention when no driving voltage is applied.
图8为本发明提供的三维影像液晶显示系统中偏振态扫描面板施加驱动电压时的工作状态示意图。FIG. 8 is a schematic diagram of the working state of the polarization state scanning panel in the three-dimensional image liquid crystal display system provided by the present invention when a driving voltage is applied.
图9为申请号为200910205678.2的专利倍频信号时序示意图。Fig. 9 is a schematic diagram of the timing sequence of the frequency multiplication signal of the patent application number 200910205678.2.
图1至图8中：100表示液晶显示装置，110表示上偏振片，120表示彩膜基板，130表示上取向膜，140表示液晶层，150表示下取向膜，160表示阵列基板，170表示下偏振片，400表示液晶显示系统扫描面板，410表示第一透明基板，420表示第一条状透明驱动电极，430表示第一取向膜，440表示扫描面板液晶层，450表示第二取向膜，460表示第二条状透明驱动电极，470表示第二透明基板，800表示偏振眼镜。1 to 8: 100 denotes a liquid crystal display device, 110 denotes an upper polarizer, 120 denotes a color filter substrate, 130 denotes an upper alignment film, 140 denotes a liquid crystal layer, 150 denotes a lower alignment film, 160 denotes an array substrate, and 170 denotes a lower Polarizer, 400 represents the scanning panel of the liquid crystal display system, 410 represents the first transparent substrate, 420 represents the first strip-shaped transparent driving electrode, 430 represents the first alignment film, 440 represents the liquid crystal layer of the scanning panel, 450 represents the second alignment film, 460 Indicates the second strip-shaped transparent driving electrode, 470 indicates the second transparent substrate, and 800 indicates polarized glasses.
具体实施方式Detailed ways
下面通过具体实施例并结合附图对本发明做进一步详细描述。The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.
图4所示为本发明提供的三维影像液晶显示系统的结构示意图。该显示系统包括出射偏振画面的液晶显示器100、偏振态扫描控制面板400和偏振眼镜800。所述液晶显示器100为现有的液晶显示装置，如图1所示，包括下偏振片170、阵列基板160、下取向膜150、液晶层140、上取向膜130、彩膜基板120和上偏振片110。在阵列基板160和彩膜基板120外侧分别设置有偏振方向相垂直的下偏振片170和上偏振片110，内侧分别涂覆有下取向膜150和上取向膜130；在下取向膜150和上取向膜130之间填充有液晶层140。所述偏振态扫描控制面板400如图4所示，包括第一透明基板410、第一条状透明驱动电极420、第一取向膜430、液晶层440、第二取向膜450、第一条状透明驱动电极460和第二透明基板470。第一透明基板410和第二透明基板470相对的表面上分别涂覆有与液晶显示器100行扫描电极(或液晶显示器行数)相同的条状透明电极(420、460)；在条状透明驱动电极420、460相对的表面上分别布设第一取向膜430和第二取向膜450，且第一取向膜430和第二取向膜450上的取向槽之间形成一夹角；在第一取向膜430和第二取向膜450之间填充液晶层440。所述偏振眼镜800左、右镜片的透光偏振态相互正交。所述偏振态扫描控制面板400贴合于所述显示器100表面(光出射面)。FIG. 4 is a schematic structural diagram of a three-dimensional image liquid crystal display system provided by the present invention. The display system includes a
在本实施例中，液晶显示装置100为现有的液晶显示器；偏振态扫描控制面板400的两块透明基板为玻璃；条状透明驱动电极使用现有制备液晶显示器使用的ITO(即铟锡氧化物)制作；偏振态扫描控制面板的液晶层440可采用TN型(即扭曲向列型)液晶、HTN型(即高扭曲向列型)液晶或STN型(即超扭曲向列型)液晶制作；在实际操作中只需要适当调整两取向槽之间的夹角和驱动电压以及配套偏振眼镜两镜片偏振方向之间的夹角即可。在本实施例中以TN型液晶作为扫描面板液晶层材料来进行说明。In this embodiment, the liquid
由于液晶材料具有介电各向异性、电导各向异性及双折射性，所以液晶分子在外加电场下排列会发生变化，显示出旋光性。TN型液晶盒在偏振扫描控制面板液晶层两侧分别有取向槽相互垂直的第一取向膜和第二取向膜，由于液晶的粘着性，临近取向膜的液晶分子长轴与取向槽方向平行分布，而介于其间的液晶分子则连续扭曲90度排列。如图6所示，当第一透明驱动电极和第二透明电极上不施加驱动信号电压时，液晶分子扭曲90度排列。由于液晶的扭曲距离远大于可见光的波长，因此垂直入射到液晶盒的偏振光在通过液晶层的过程中，其偏振方向将随着液晶分子的扭转方向旋转90度。液晶显示器出射的线性偏振光在通过偏振态扫描控制面板的液晶层时，由于液晶的旋光性而使偏振方向旋转90度，形成与初始偏振方向垂直的偏振光。当对液晶层加电压时，从阈值电压Vth起液晶分子的长轴就开始向电场方向倾斜，当V＝Vth时，除电极附近的液晶分子外，其他液晶分子的长轴都沿着平行于电场的方向重新排列，从而导致旋光性消失。因此当第一透明驱动电极和第二透明电极上施加驱动信号电压时，液晶分子将按平行于电场方向排列，液晶显示器出射的线性偏振光在通过偏振态扫描控制面板液晶层时偏振方向不发生变化，因此透过光的偏振方向仍为初始偏振方向。Since liquid crystal materials have dielectric anisotropy, conductance anisotropy and birefringence, the alignment of liquid crystal molecules will change under an external electric field, showing optical activity. The TN-type liquid crystal cell has a first alignment film and a second alignment film with alignment grooves perpendicular to each other on both sides of the liquid crystal layer of the polarization scanning control panel. Due to the adhesiveness of the liquid crystal, the long axis of the liquid crystal molecules adjacent to the alignment film is distributed parallel to the direction of the alignment groove. , while the liquid crystal molecules in between are continuously twisted and arranged at 90 degrees. As shown in FIG. 6 , when no driving signal voltage is applied to the first transparent driving electrode and the second transparent electrode, the liquid crystal molecules are arranged twisted by 90 degrees. Since the twisting distance of liquid crystal is much longer than the wavelength of visible light, the polarization direction of the polarized light perpendicularly incident on the liquid crystal cell will rotate 90 degrees with the twisting direction of the liquid crystal molecules during the process of passing through the liquid crystal layer. When the linearly polarized light emitted by the liquid crystal display passes through the liquid crystal layer of the polarization state scanning control panel, the polarization direction is rotated by 90 degrees due to the optical rotation of the liquid crystal, forming a polarized light perpendicular to the initial polarization direction. When a voltage is applied to the liquid crystal layer, the long axes of the liquid crystal molecules begin to tilt toward the direction of the electric field from the threshold voltage Vth . When V=Vth , except for the liquid crystal molecules near the electrodes, the long axes of the other liquid crystal molecules are all along the The direction parallel to the electric field rearranges, resulting in loss of optical activity. Therefore, when the driving signal voltage is applied to the first transparent driving electrode and the second transparent electrode, the liquid crystal molecules will be aligned parallel to the direction of the electric field, and the polarization direction of the linearly polarized light emitted by the liquid crystal display does not change when it passes through the polarization state and scans the liquid crystal layer of the control panel. Change, so the polarization direction of the transmitted light is still the original polarization direction.
基于以上原理，当从液晶显示器出射一定方向的线性偏振光时，通过对偏振态扫描控制面板驱动信号的控制可得到偏振方向互相垂直的两种线性偏振光，当观众佩戴左眼和右眼镜片分别贴附偏振方向相互垂直的偏振片的偏振眼镜时，即可使左眼看到对应偏振方向的图像，右眼看到与左眼偏振方向垂直的图像。控制通入偏振态扫描控制面板的驱动信号为与液晶显示器行扫描频率匹配的周期信号，则本发明提供的液晶显示系统则以此频率交替刷新左右眼图像，观众便能从左眼和右眼分别看到连续且对应的左右眼画面，经过大脑皮层的处理，就能呈现出三维影像显示效果；同时，由于从液晶显示器射出的线性偏振左、右眼图像经振态扫描控制面板后变成偏振态相互正交的左、右眼图像，再经左、右镜片透光偏振态相互正交的偏振眼镜分别进入用户左、右眼，使得左眼图像不能进入用户右眼、右眼图像也不能进入用户左眼，从而彻底消除了左、右眼图像相互串扰和混乱的问题。Based on the above principles, when the linearly polarized light in a certain direction is emitted from the liquid crystal display, two kinds of linearly polarized light whose polarization directions are perpendicular to each other can be obtained by controlling the driving signal of the polarization state scanning control panel. When polarizing glasses with polarizing plates perpendicular to each other are respectively attached, the left eye can see the image corresponding to the polarization direction, and the right eye can see the image perpendicular to the polarization direction of the left eye. The drive signal that controls the access to the polarization state scanning control panel is a periodic signal that matches the horizontal scanning frequency of the liquid crystal display, and the liquid crystal display system provided by the present invention then alternately refreshes the images of the left and right eyes at this frequency, so that the viewer can view images from the left eye and the right eye. Seeing the continuous and corresponding left and right eye images separately, after the processing of the cerebral cortex, it can present a three-dimensional image display effect; at the same time, due to the linearly polarized left and right eye images emitted from the liquid crystal display, they become The left and right eye images whose polarization states are orthogonal to each other enter the user's left and right eyes respectively through the polarized glasses with mutually orthogonal polarization states of the left and right lenses, so that the left eye image cannot enter the user's right eye, and the right eye image cannot enter the user's right eye. It cannot enter the user's left eye, thus completely eliminating the problem of crosstalk and confusion between left and right eye images.
在具体应用中，为了使液晶显示器所显示的图像与偏振态扫描控制面板的偏光旋转同步，可以使用与该液晶显示器行扫描频率相同的周期信号作为驱动信号。当液晶显示器开始扫描第N帧图像时，偏振态扫描控制面板的条状透明驱动电极在驱动信号的控制下以与该液晶显示器同步的速度依次外加电场，改变扫描面板液晶层对应此行扫描电极位置的旋光性，使透过光的偏振方向发生改变；而对于液晶显示器还未进行第N帧图像扫描的位置，该处所显示的仍为第N-1帧图像，此位置所对应的偏振态扫描控制面板位置上的条状透明驱动电极在驱动信号的控制下依然处于无外加电场状态，透过光的偏振方向未发生改变。这使得第N帧图像与第N-1帧图像分别为两种偏振方向互相垂直的偏振光，当观众佩戴配套偏振眼镜时，就使得第N帧图像和第N-1帧图像分别透过左眼和右眼镜片。当显示三维图像时，液晶显示装置将进入左眼和右眼的图像以一定的播放频率间隔输出，例如第N-1帧输出左眼图像，第N帧就输出右眼图像；当第N-1帧和第N帧图像分别透过偏振眼镜的左眼和右眼镜片后，左右眼分别接收到了相应的图像，在大脑皮层的处理下，便可观测到三维图像。当该液晶显示装置以较高的频率间隔输出左眼和右眼图像时，观众感觉不到帧的断续，便能从左右眼分别看到连续的左右眼图像，实现连续画面的三维观看。In a specific application, in order to synchronize the image displayed by the liquid crystal display with the polarization rotation of the polarization state scanning control panel, a periodic signal with the same horizontal scanning frequency as the liquid crystal display can be used as a driving signal. When the liquid crystal display starts to scan the image of the Nth frame, the strip-shaped transparent driving electrodes of the polarization state scanning control panel apply an electric field sequentially at a speed synchronous with the liquid crystal display under the control of the driving signal, and change the scanning electrode corresponding to the liquid crystal layer of the scanning panel. The optical rotation of the position changes the polarization direction of the transmitted light; and for the position where the liquid crystal display has not scanned the image of the Nth frame, what is displayed there is still the image of the N-1th frame, and the polarization state corresponding to this position The strip-shaped transparent driving electrodes at the position of the scanning control panel are still in the state of no external electric field under the control of the driving signal, and the polarization direction of the transmitted light does not change. This makes the Nth frame image and the N-1th frame image respectively two kinds of polarized light whose polarization directions are perpendicular to each other. eye and right eye lens. When displaying a three-dimensional image, the liquid crystal display device outputs the images entering the left eye and the right eye at a certain frequency interval, for example, the left eye image is output in the N-1 frame, and the right eye image is output in the N frame; After the 1st frame and the Nth frame of image pass through the left eye and right eye lens of the polarized glasses respectively, the left and right eyes respectively receive the corresponding images, and under the processing of the cerebral cortex, a three-dimensional image can be observed. When the liquid crystal display device outputs left-eye and right-eye images at relatively high frequency intervals, viewers can see continuous left and right eye images from the left and right eyes without feeling the discontinuity of frames, realizing continuous three-dimensional viewing of pictures.
图7所示为液晶显示系统偏振态扫描控制面板400未通入驱动电压，即显示第N-1帧图像时整个三维影像显示系统的工作情况，偏振态扫描控制面板400对液晶显示器100出射的偏振光进行90度旋转，光线通过偏振眼镜800与此偏振光同向的右眼偏振镜片仅进入右眼；图8所示为液晶显示系统偏振态扫描控制面板400通入驱动电压，即显示第N帧图像时整个三维影像显示系统的工作情况，液晶显示器100出射的偏振光透过振态扫描控制面板400后偏振方向不发生变化，光线通过偏振眼镜800与此偏振光同向的左眼偏振镜片仅进入左眼，由此实现双眼分别观测不同图像的目的。FIG. 7 shows the operation of the entire three-dimensional image display system when the polarization state
本发明通过在液晶显示器出射前端设置偏振态扫描控制面板来改变出射图像的偏振方向，使液晶显示系统所显示连续图像的前后两帧图像偏振方向互相垂直，再配合使用配套的偏振眼镜，使观众左右眼分别看到不同但相对应的左右眼图像，从而实现三维影像显示效果。在实际开发过程中，为了适应各种需要，可以采用HTN型液晶或STN型液晶等来代替本实施例技术方案说明中所使用的TN型液晶，只需要适当调整两取向槽之间的夹角和驱动电压以及配套偏振眼镜两镜片偏振方向之间的夹角即可。用于三维影像显示的液晶显示系统扫描面板利用液晶的旋光性来实现三维影像显示，驱动信号要求低，驱动电路结构简单，易于生产。在具备优秀三维成像功能的同时，液晶显示系统的扫描面板结构简单，更轻更薄，且成本更低，易于生产和使用。用户需佩戴的配套偏振眼镜仅为两片偏振方向成一定夹角的偏振片，结构简单，成本低廉且便于生产，特别是相比于市场上其他同功能产品使用更为轻便和舒适，能够得到广泛的推广应用。The present invention changes the polarization direction of the output image by setting a polarization state scanning control panel at the output front end of the liquid crystal display, so that the polarization directions of the two frames of images before and after the continuous image displayed by the liquid crystal display system are perpendicular to each other, and then cooperate with matching polarizing glasses to make the audience The left and right eyes respectively see different but corresponding images for the left and right eyes, thereby achieving a three-dimensional image display effect. In the actual development process, in order to meet various needs, HTN-type liquid crystals or STN-type liquid crystals can be used instead of the TN-type liquid crystals used in the description of the technical solution of this embodiment, and only need to properly adjust the angle between the two alignment grooves The driving voltage and the included angle between the polarization directions of the two lenses of the matching polarized glasses are enough. The scanning panel of the liquid crystal display system for three-dimensional image display uses the optical rotation of liquid crystal to realize three-dimensional image display, has low requirements for driving signals, simple structure of driving circuit, and is easy to produce. While having excellent three-dimensional imaging functions, the scanning panel of the liquid crystal display system has a simple structure, is lighter and thinner, and has a lower cost, and is easy to produce and use. The matching polarized glasses that users need to wear are only two polarizers whose polarization directions form a certain angle. The structure is simple, the cost is low, and it is easy to produce. Extensive promotion and application.
需要说明的是：以上实施例仅用以说明本发明的技术方案，而非限定本发明的保护范围。凡在本发明技术方案的精神和范围内，对上述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换或改进等，均包含在本发明的保护范围内。It should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit the protection scope of the present invention. Within the spirit and scope of the technical solutions of the present invention, modifications to the technical solutions described in the above embodiments, or equivalent replacement or improvement of some of the technical features are included in the protection scope of the present invention.
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