STN-LCD制造摩擦工艺及静电消除工艺探讨

定向层（PI层）是STN－LCD合铁一个重要组成部分。因为简单地把液晶夹在两片玻璃基板之间，很难获得均匀的液晶分子排列，只有在基板作上定向层并作摩擦处理后，液晶的物性常数因分子排列状态才会发生变化，液晶分子对于电场等外力的响应也会变得有序。所以，研究液晶分子的排列定向技术，在液晶显示元件构成技术上具有重要意义。     

具有宽而均匀视角特性的同心圆摩擦液晶显示器件

本文介绍了一种新型的摩擦技术——同心圆摩擦（简称ＣＣＲ）方法。与普通ＳＴＮ液晶盒相比，ＣＣＲ液晶盒具有宽而均匀的视角特性、低的阈值特性和快速响应特性。在液晶混合物中加入光聚合物，获得了稳定的ＣＣＲ液晶盒。     

一种具有空间化的轴对称偏振特性的液晶偏振光器件

采用遥偏振和向列相液晶制作的夹层结构液晶盒,一个基板表面单向摩擦,另一个基板表面通过圆形摩擦或两个基板圆形摩擦实现液晶分子的同心圆对称排列。该液晶器件可获得具有空间轴对称偏振特性的线偏振光,作为一种新型的偏振光器件使用。利用琼斯矩 出现该偏振特性的原理和该偏振光器件的类型。     

STN-LCD液晶显示器定向层摩擦工序的静电研究

讨论了基于STN液晶显示器定向层摩擦静电原理,从摩擦布表面静电累积、PI稀释剂、TOPCOAT、湿度、离子风机和软X光等方面对静电影响进行实验研究,并对结果进行了讨论,提出了控制摩擦工序静电的建议。     

未经摩擦处理的可聚合液晶制备的延迟膜

研制了一种由可聚合液晶制备的延迟膜。这种延迟膜是一种负性C-plate,利用胆甾相液晶的性质,对于采用垂直取向(verticalalignment,VA)模式的液晶盒进行光学延迟补偿。所述延迟膜使用不经摩擦处理的取向层,制备工艺简单,且具有优良的光学性能。     

一种具有空间变化的轴对称偏振特性的液晶偏振光器件

采用普通的偏振片和向列相液晶制作的夹层结构液晶盒,一个基板表面单向摩擦,另一个基板表面通过圆形摩擦或两个基板圆形摩擦实现液晶分子的同心圆对称排列。该液晶器件可获得具有空间轴对称偏振特性的线偏振光,作为一种新型的偏振光器件使用。利用琼斯矩阵分析解释了出现该偏振特性的原理和该偏振光器件的类型。     

单面摩擦液晶盒显示特性的研究

单面摩擦盒由两块涂有P2层的玻璃基板构成,只对其中一片做摩擦处理,第一片不摩擦,靠液晶自身螺距控制扭曲角,这种模式的液晶盒减少了摩擦工艺,可以避免静电对TFT的影响,因而具有重要的实践意义。本文研究了具有不同d/P值的单面摩擦盒的显示特性和单面摩擦盒的最佳参数选择。实验还发现单面摩擦盒的阙值电压和响应时间随温度的变化不同于双面摩擦液晶盒。     

红外二向色性法测量取向膜表面液晶界面层的取向度

液晶分子的取向排列通常需取向膜诱导引发,但实验发现强摩擦处理的取向膜表面的液晶分子有序度远低于液晶体内部的有序度,大约为体内部的1／2。实验中采用楔形液晶盒,用较严谨的红外二向色性吸收定量分析了液晶层厚方向上的平均有序度随液晶层厚的变化,并通过这一结果的理论拟合,获得了取向膜表面的液晶分子取向有序度,同时获得了液晶界面层厚大约为7nm。这些结果说明液晶具有抵制外界微扰、自我修复分子取向度的能力,有利于对液晶排列机理的理解,也为研究新的取向方法提供了参照依据。     

光摩擦开发新工艺实现光定向法实用化

制造液晶显示器（LCD）,定向控制工艺（液晶定向工艺）是不可缺少的,即在基板面上将液晶分子的方位排成一个方向,使其形成倾斜角。在原来制造LCD的现场,定向工艺采用的是接触式摩擦法。而制造下一代大型LCD的2m见方的大型玻璃,应用摩擦法是难以实现的,故人们正在寻求非接触式的液晶定向法。现提出的非接触式定向法,即通过斜向照射的光定向法的方案。     

使液晶分子在基片表面定向排列的新方法——激光法

美国特拉华州威尔明顿的Hercules公司研究人员发现了一种可使液晶分子在基片表面定向排列的新方法——激光法。使LCD中液晶分子在基片表面择优定向排列的典型方法,称为机械摩擦法。通常用一布轮来摩擦贴在制有导电电极玻璃基片上的聚合物薄膜表面,当液晶分子跟该聚合物表面接触时就将按照其摩擦运动的方向排列起来。如果不经过这一步加工处理,那么在外加电场作用下,LCD中的液晶分子先是随机地分散开来,再成群聚集,尔后随机排列成一束一束     

单玻璃基板与各向异性聚合物膜的IPS-LCD的应用

介绍了一种使用单片玻璃基板和各向异性聚合物膜的轻型、共面转换液晶显示(IPS-LCD)技术。液晶分子由伸长的聚合物膜内的颗粒排列。各向异性聚合物膜的取向性能与聚酰亚胺(PI)摩擦层相当。良好的液晶取向性能使新器件的对比度(514:1)、驱动电压和响应时间都能够与双玻璃基板LCD相比拟。这种各向异性膜也能作为拓宽视角的相位补偿膜来使用。该技术特别引人注目之处在于制作单基板显示器,同时它也具有实现双层宾主显示和IPS-LCD柔性显示的潜在应用。     

IPS-LCD using a glass substrate and an anisotropic polymer film

A lightweight in-plane-switching liquid crystal display (IPS-LCD) using a single glass substrate and an anisotropic polymeric film is demonstrated. The liquid crystal molecules are aligned by the elongated polymer grain of the film. The alignment capability of the anisotropic film is comparable to a buffed polyimide layer. Compared to the LCD using two glass substrates, our new device exhibits a comparable contrast ratio (/spl sim/514:1), driving voltage, and response time because of good LC alignment. Such an anisotropic film can also function as a phase compensation film for widening the viewing angle. This technology is particularly attractive for making single-substrate displays and also has potential for a double-layered guest-host display and a flexible display using IPS LCDs.     

偏光片除泡工艺

偏光片作为液晶显示器的三大主要材料之一,其在液晶玻盒上的贴附质量直接影响到液晶显示器的显示效果.针对偏光片贴附后存在的气泡缺陷,阐述了偏光片除泡的重要性,分析了偏光片除泡的具体工艺、相关参数的作用和原理;同时对除泡工艺中的主要问题提出了解决方法.     

Anisotropic Conductive Film Bonding by Making Use of a High-Power Diode Laser

Anisotropic conductive film (ACF) bonding between liquid crystal displays (LCDs) and driver integrated circuits (ICs) is one of the key technologies for developing high-resolution LCDs. The bonding pitch between LCD and tape carrier package (TCP), which influences the total reliability of LCD modules, depends on the characteristics and bonding conditions of ACF used. So, the bonding process between TCP and a glass panel with ACF using a high-power diode laser as a heat source for curing is preliminarily tested in this experiment. Also, laser transient thermal simulation was performed to analyze the thermal response of the assembly process for a package using ACF. The temperature on the ACF layer goes up to 180 degC (ACF curing temperature) within 1 s after exposure to laser light. This paper reports an effective bonding method using a diode laser, which accomplishes a fine-pitch ACF bonding and determines the optimum ACF bonding condition effectively     

The wide view (WV) film for enhancing the field of view of LCDs

This paper reviews the technologies of the wide view (WV) film. The WV film is an optical compensation film, which remarkably enhances the field of view of twisted nematic (TN) thin-film transistor liquid crystal displays (TFT-LCDs). We have recently developed a new WV film for the OCB mode, which promises a fast optical response speed and wide viewing angle LCD-TV. The WV film is made of a hybrid alignment polymerized discotic material (PDM) layer coated on a (tri-acetyl cellulose (TAC) substrate. The PDM layer alignment technology and the TAC retardation control technology give us the flexibility to develop a compensation film for any LCD mode and allow a cost effective roll-to-roll polarizer lamination process.     

电控双折射盒中指向矢分布的计算

在液晶弹性理论的基础上计算了电控双折射盒中的指向矢分布和延迟量。讨论了弱锚定边界条件对指向矢分布和延迟量的影响。本文结果对电控双折射盒的设计有一定的参考价值。     

利用微锥膜改善反射式液晶显示器件的视角

提出了一种可以改善反射式彩色液晶显示视角的微锥结构膜。模拟计算结果表明,当光从微锥的底部人射时,该膜起到准直作用,当光从微锥的顶部入射时,该膜起到散射作用。利用微锥膜可显著改善反射式干涉滤光膜的视角依赖性。由于微锥膜的作用不依赖了液晶盒结构,所以,可对多种结构的反射式彩色液晶显示有效。     

Mechanical properties of thin-film materials evaluated from amplitude-dependent internal friction

A method is presented to evaluate the mechanical properties of thin-film materials from measurements of the amplitude-dependent internal friction. According to the constitutive equation, the internal friction in the film can be determined separately from measured damping of the film/substrate composite. The internal friction in aluminum films is dependent on the strain amplitude that is approximately two orders of magnitude higher than that for bulk aluminum. On the basis of the microplasticity theory, the amplitude-dependent internal friction in the film can be converted into the plastic strain as a function of effective stress on dislocation motion. The mechanical responses thus obtained for aluminum films show that the plastic strain of the order of 10⁻⁹ increases nonlinearly with increasing stress. These curves tend to shift to a higher stress with decreasing film thickness and also with decreasing temperature, both indicating a suppression of microplastic flow. The microflow stress at a constant level of the plastic strain varies inversely with the film thickness, provided the grain size is larger than the film thickness. The film thickness effect in the microplastic range can be well explained by the bowing of a dislocation segment whose ends are pinned at the film surface and at the film/substrate interface.     

LCD面板设计与菲林制作

由于AUTOCAD具有完善的图形绘制功能、强大的图形编辑功能而被用于LCD的设计。文章主要介绍在LCD面板设计与菲林片制作的教学实训实践过程中,如何简单有效地将用AUTOCAD软件制作的LCD面板图转换成制作光绘用菲林的过程。