New Reflective-type liquid Crystal Displays of very low power consumption, thin structure and high image quality

我们之前已经提出了一种新的无色差反射TNLCD和STNLCD，其中有一个偏光片和一个延迟膜。所述LCD能够使用诸如微滤色器类型的混色系统创建反射彩色LCD。我们通过计算机模拟研究了液晶的电光特性，发现通过优化电池参数，液晶可以提供高亮度、高对比度和消色差的显示。在这些优化的条件下，我们制造了24厘米（9.5英寸）。-对角线VGA单色和512色反射tnlcd。在探测器角度为*15度的情况下，实现了单色和彩色反射TNLCD的反射率分别大于180和90%，峰值反射率可与标准白光（BaSO4）媲美；两者的最大对比度为6:1。这些值对于反射式lcd是可以接受的。然而，通常黑色模式的TNLCD存在分辨率越高，由于电极之间的空间而导致亮度越低的问题。为了解决这一问题，我们提出了一种新的正白模式消色差反射TNLCD，它由上述正黑模式反射TNLCD和一个扭曲角度相同大小的液晶聚合物膜组成，但与LC层相反。对液晶显示器的电光特性进行了数值分析，得出了获得高亮度、高对比度消色差图像的几种解决方案。此外，我们还提出了一种利用双折射效应的新型彩色液晶显示器，该液晶显示器由具有单个偏光片和一个延迟膜的STNLCD组成。该液晶显示器由于无彩色滤光片而具有低成本的优势，并且由于无视差而具有高分辨率。对液晶屏的电光特性进行了数值分析，发现有几种方法可以获得反射式液晶屏可接受的多色图像。

We have previously proposed a new, achromatic reflective TNLCD, and STNLCD with one polarizer and one retardation film. The LCDs enable creation of are reflective color LCD using a color-mixing system such as the micro color filter type. We have studied by computer simulation the electro-optical properties of the LCDs, and we found that the LCDs provided a high-brightness, high-contrast ratio and achromatic display by optimization of cell parameters. With these optimized conditions, we have fabricated 24-cm (9.5- in.)-diagonal VGA monochrome and 512-color reflective TNLCDs. We achieved a reflectance of monochrome and color reflective TNLCD of more than 180 and 90% respectively with*15 degree of the detector angle, with peak reflectance comparable with standard white (BaSO4) ; the maximum contrast ratio of both is 6 : 1. These values are acceptable for reflective LCDs.However, the TNLCD of the normally black mode has the problem that the higher the resolution is, the lower the luminance becomes due to the space between electrodes. In order to solve this problem, we have proposed a new normally white mode achromatic reflective TNLCD, composed of the above mentioned normally black mode reflective TNLCD and one liquid-crystal polymer film with a twist angle of the same magnitude, but with an opposite-handed to the LC layer. The electrooptical properties oh the LCD were numerically analyzed, and it was found that several sets of solutions exist for obtaining an achromatic image with high luminance as well as high contrast ratio.Furthermore, we have proposed a new color LCD using birefringent effect, composed of the STNLCD with a single polarizer and one retardation film. The LCD has advantage f low cost because of no color filter, and high resolution because of no parallax. The electro-optical properties of the LCD were numerically analyzed, and it was found that several sets of solutions exist for obtaining a multi-color image to be acceptable for reflective LCDs.