一种利用反射电极偏压的半反半透LCD

介绍了一种VA模式反射电极偏压的常黑单盒厚半反半透LCD.在透射区,形成连续且均匀的贯穿液晶层的电场;而在反射区,电场则主要由电极表面形状控制.由此,可使透射区的位相延迟约是反射区的2倍.这样一种半反半透LCD不论透射区还是反射区都有很高的光透过率(＞90%),同时二者灰阶特性重合度也很好.     

一种利用反射电极偏压的半反半透LCD

介绍了一种VA模式反射电极偏压的常黑单盒厚半反半透LCD。在透射区,形成连续且均匀的贯穿液晶层的电场;而在反射区,电场则主要由电极表面形状控制。由此,可使透射区的位相延迟约是反射区的2倍。这样一种半反半透LCD不论透射区还是反射区都有很高的光透过率(>90%),同时二者灰阶特性重合度也很好。     

一种利用反射电极偏压的半反半透LCD

介绍了一种VA模式反射电极偏压的常黑单盒厚半反半透LCD.在透射区,形成连续且均匀的贯穿液晶层的电场;而在反射区,电场则主要由电极表面形状控制.由此,可使透射区的位相延迟约是反射区的2倍.这样一种半反半透LCD不论透射区还是反射区都有很高的光透过率(＞90%),同时二者灰阶特性重合度也很好.     

Reflective liquid crystal television display

A new reflective television display, operating off the air, is described. The display uses the dynamic scattering mode (DSM) in nematic liquid crystals and can be viewed in high-brightness ambients. The liquid crystal cell, 6 to 12 µm thick, was addressed in real time by means of an electron beam using a wire-mosaic faceplate on a demountable cathode ray tube. Two different liquid crystal materials--anasylidene paraamino phenyl acetate (APAPA) and an RCA proprietary room temperature liquid crystal--were tested with similar results except for the difference in operating temperature (82 to 110° C and room temperature, respectively). The resolution of the 3.1-cm-square display was somewhat less than that required for commercial television (∼150 lines), limited by the mosaic structure but not the liquid crystal. Adequate resolution should be achievable in slightly larger displays. The contrast was not optimized (7.5 to 1) but several techniques are available to improve this value to 15 or 20 to 1 as has been demonstrated in static displays. The subjective evaluation of this display points out the attractiveness of reflective television panels; under suitable external illumination the panel has a wide viewing angle (±45° approximately). The current and voltage requirements to achieve the DSM in liquid crystals are such as to raise hopes that an integrated addressing approach suitable for flat television panels can be found.     

彩色铁电液晶显示器

彩色滤波膜、透明导电膜，表面稳定的铁电液晶取向膜等构成了彩色铁电液晶显示器的主要材料。文章论述了彩色铁电液晶显示器的制造和性能，制出的铁电液晶显示器，其对比度达８４：１，上升时间为１１０μｓ，下降时间为７６μｓ。     

新一代液晶显示--硅片上的液晶LCOS

什么是LCOS液晶显示 LCOS是硅片上的液晶（Liquid　crystal on Silicon） 的缩写。这是一种直接将液晶显示器件做到单晶硅基片上　的液晶显示器件。单晶硅基片上可以将液晶显示器件的有 源矩阵TFT及外围驱动电路和控制电路等全部制作在上 面,以此为液晶显示器件的一个基板,与另一块作为公共 极的具有透明导电层的玻璃基板共同封接成一个薄盒,灌 入液晶,如图1所示,即可制成一个硅片上的液晶显示器 件（LCOS）。 我们知道,液晶显示已经经过了TN型,STN型,TFT 型几代更新。他们都是在LCD本身上作文章。而现在的LCOS则是将LCD与集成电路结合在一起,因而对LCD来     

表面稳定化型铁电液晶显示器件

通过对表面稳定化型铁电液晶显示器（ＳＳＦＬＣＤ）的工作原理、工作特性分析，全面介绍了表面稳定化型电液晶显示器的开关过程、工作方式、取向控制和驱动方法，同时也介绍了它的用途。     

High-brightness projection display using spatial light modulatorswith polymer-dispersed liquid crystal

A brightness-enhanced full-color projection display using optically addressed spatial light modulators (SLMs) with light-scattering mode polymer-dispersed liquid crystal has been developed. The SLM can modulate strong unpolarized light efficiently using the light-scattering effect. The projector using SLM with a Schlieren optical system produces bright, high-contrast images. Electrical image compensation of the shading and gamma characteristics of the SLMs carried out in the driving circuits improves the spatial uniformity and grayscale representation of the projected images. The system projects a bright image of more than 1300 cd/m² with a high extinction ratio over 130:1 on a 60-inch screen, which can be viewed in a bright living room under normal lighting conditions     

Precise optical retardation measurement of nematic liquid crystal display using the phase-sensitive technique

A simple and novel optical heterodyne interferometer based on phase measurement was developed to measure liquid crystal cell parameters. Due to a common-path configuration utilized in this method, the Fabry-Perot effect and surface reflection could be eliminated in measurement, and a highly accurate measurement was expected. Based on the experimental data of the voltage-dependent phase change, the maximum phase retardation and cell gap of the nematic liquid crystal (NLC) layer was achieved experimentally. Experimental results agree well with theory.     

An O-plate compensated in-plane switching liquid crystal display

Pretilt angle effect on the dark-state light leakage and viewing angle of in-plane switching (IPS) liquid crystal display is investigated. As the liquid crystal (LC) pretilt angle increases, the light leakage becomes more severe and the off-axis light leakage from the out-of-plane LC directors cannot be neglected. Introducing an oblique compensation plate (O-plate) reduces the off-axis light leakages from the crossed linear polarizers and the anisotropic LC media simultaneously which, in turn, improves the viewing angle of the IPS LCD.     

液晶激光投影显示系统设计

激光显示技术与传统显示技术相比,具有色域大、颜色饱和度高以及功耗低等优点,已成为下一代显示领域的主要技术。利用激光投影技术和液晶显示技术的特点,设计了一种基于液晶空间光调制器的液晶激光投影显示系统。该系统使用波长为532 nm的激光作为投影光源,采用ARM微处理器对240×320分辨率的液晶空间光调制器进行控制,实现了图像以及文字的投影显示。通过激光束匀光和激光散斑均化,提高了投影显示图像的辐照均匀性,抑制了激光散斑对于投影显示图像的影响。实验结果表明:研究液晶激光投影显示系统对于激光投影技术具有重要的意义。     

Performance characteristics of nematic liquid crystal display devices

Display devices using nematic liquid crystal materials offer advantages over other display media in low-voltage low-power operation, cost of materials and fabrication methods, electrical compatibility with MOS drive circuits, and flexibility of character size and format. This paper describes liquid crystal display devices that utilize dynamic scattering to modify transmitted or reflected light. We have synthesized individual materials that have nematic temperature ranges as large as -15-115°C without super-cooling effects at low temperatures. When these materials are used in transmissive displays having liquid crystal layers 12 µm thick sandwiched between transparent electrodes, contrast ratios of 30:1 to 50:1 are realized at 10-40 V dc or ac with a current density of ∼1-10 µA/cm². Turn-on times are 10-50 ms and turn-off times are 30-100 ms, precise values being dependent on the specific material, temperature, and voltage used. The contrast ratio versus voltage exhibits a threshold so that it may be possible to matrix address liquid crystal display panels. Operating lifetime and display applications are also discussed.     

液晶显示器新技术与市场竞争

1 大尺寸LCD竞争状况。在液晶显示器领域，日本、韩国和中国台湾的同行们为抢占市场正在开展激烈竞争。日本公司的主要策略是：(1)避免以价格战为主的直接竞争；(2)尽量采用新技术。为此，它们放弃了中等尺寸(用于台式与笔记本PC)的LCD市场，而集中力量于大屏幕的液晶电视机及主要用于手机与PDA的小尺寸LCD。     

螺距结构变形铁电液晶显示器

通过对螺距结构变形铁电液晶的工作原理，工作特性分析，全面介绍了螺距结构变形铁电液晶显示器的动态特性－驱动电压，响应速度，对比度，透过率以及储存动性，同时介绍了它的用途。     

Recent advances in liquid crystal materials and display devices

This review article describes three recent areas of significant development in the field of liquid crystal materials and devices. In the first portion of the paper, an assessment is presented of the multiplexing performance of several materials used in twisted nematic displays. A novel concept of electronic temperature compensation is also mentioned. Next, the cholesteric nematic phase change with pleochroic dyes is discussed with primary emphasis on the liquid crystal materials. Finally, a new nonmultiplexed storage oscilloscope is described.     

A flexible depth probe using liquid crystal polymer

We proposed a method of making a flexible depth-type neural probe using liquid crystal polymer. Conventional depth neural probes made of metal or silicon have the limitations of a single recording site per shank or the brittleness of the silicon substrate. To avoid these drawbacks, polymer-based depth neural probes have been developed with biocompatible polymers such as polyimides or parylenes. However, those have suffered from the difficulty of inserting the probes into brain tissues due to their high flexibility, requiring mechanical reinforcements. Herein, we report the first attempt to use a flexible material, liquid crystal polymer (LCP), as a substrate for a depth-type neural probe. The LCP-based probe offers a controllable stiffness vs. flexibility and compatibility with thin-film processes in addition to its inherent characteristics such as high reliability and biocompatibility. In the present study, an LCP neural probe was fabricated to have enough stiffness to penetrate the dura mater of rodent brains without a guide tool or additional reinforcement structures. A simultaneous multichannel neural recording was successfully achieved from the somatosensory motor cortex of the rodents. Immunohistochemistry showed that the electrodes could be inserted into the desired regions in the brain.     

浅析液晶显示模组技术及常见问题的分析

目前液晶外屏的生产线已经发展到第六代、第七代。生产工艺流程相当复杂,坏掉就很难更换,对于笔记本、数码摄像机和数码相机来说液晶屏简直就是这些数码产品的生命,应当妥善的维护和保养,尽量延长其使用寿命。基于液晶显示模组技术交流的目的,通过介绍液晶显示器模组技术中背光系统的常见组成及各部分的结构与作用．并对一些液晶显示器常见不良的分析和生产实际中常见不良问题进行一定的分析。     

Interleaved polarity inversion scheme for low-power liquid crystal display panels

A new polarity inversion scheme for low-power liquid crystal displays is proposed. The gate line is enabled in an interleaved sequence to trade-off the image quality with the power consumption while the column line inversion is performed. The image quality of the proposed scheme is better than the column line inversion in any possible sequence of gate line enabling.     

DLS: dynamic backlight luminance scaling of liquid crystal display

Backlight systems dominate the power requirements of battery-operated hand-held devices with color thin-film transistor (TFT), liquid crystal displays (LCDs). We introduce dynamic luminance scaling of the backlight with appropriate image compensation. Dynamic backlight luminance scaling (DLS) keeps the perceived intensity or contrast of the image as close as possible to the original while achieving significant power reduction. DLS compromises quality of image between power consumption, which fulfills a large variety of user preferences in power-aware multimedia applications. DLS saves 20% to 80% of power consumption of the backlight systems while keeping a reasonable amount of image quality degradation.