DESIGN AND TRIAL FABRICATION OF TIME SHARING MULTI-DIRECTIONAL VIEW 3D DISPLAY USING HIGH-SPEED LIQUID CRYSTAL DEVICE

提出了一种由高速液晶显示面板和分时光控背光组成的三维显示系统。与多视点相对应的LCD上显示的图像以高速顺序改变，背光的光方向与显示的图像同步改变。该系统的优点是所显示的图像具有与显示面板相同的高分辨率，且结构简单。液晶面板的切换速度是场序彩色液晶显示器研究中常见的课题。从结果来看，利用现有的LC材料可以实现6视图的3D显示。着重讨论了该系统的背光源的光效。采用反射式偏光镜分别对透镜-透镜系统和视差-屏障系统进行了优化设计，以获得高亮度。结果表明，透镜-透镜系统的光效比视差-屏障系统高7倍，该背光采用透镜-透镜系统。液晶棱镜是一种易于控制光方向且效率高的器件。设计了一种微形状棱镜片和LC棱镜阵列背光源，并建立了设计准则。经试制证实，采用新设计的特殊液晶驱动方案，该器件在开、关两种情况下均能实现高速工作。然而，在高速运行中，液晶响应的中间状态是难以使用的。综上所述，采用分时方向控制背光系统的三维液晶显示器是一种实用的显示器，并讨论了基本的设计理论，并成功地阐明了其有效性。

We proposed a three-dimensional display system consisted with a high-speed liquid crystal display panel and a time-sharing light-direction control backlight. Displayed images on LCD corresponding with multi-view are changed sequentially in a high-speed and the light direction from a backlight are changed in synchronize with the displayed image. This system has merits that the displayed image shows the same high resolution as the display panel and that the structure can be simple.The subject for the switching speed of the LC panel is common in researches about a field sequential color LCD. From the results, the 3D display with 6 view can be realized using current available LC materials.The backlight for this system is discussed focusing on the light efficiency. The optimized design was performed for lenticular-lens system and for parallax-barrier system respectively with reflected type polarizer to obtain high luminosity. The lenticular-lens system shows 7 times higher light efficiency than the parallax-barrier system by the result and the lenticular-lens system is adopted for this backlight.A liquid crystal prism is used for a device which control the light direction easily and in high efficiency. A backlight with a micro-shape prism-sheet and the LC prism-array is newly devised and the design rule is established. It is confirmed by trial fabrication that the device can work in a high speed by newly designed special driving scheme of liquid crystal in both on- and off-case.However, it is clarified that the usage of the intermediate state of liquid-crystal response is difficult in high-speed operation. In conclusion, the three-dimensional LCD using the time-sharing light-direction control backlight system is shown as a practical display and fundamental design theory is discussed and the validity is clarified successfully as mentioned above.