液晶显示器用衬垫料的扫描电镜图像

论述了液晶显示器 (LCD)用衬垫料的作用和性能要求。给出了液晶显示器用衬垫料的扫描电镜图像。该图像对观测衬垫料的粒径分布和控制液晶显示器的盒厚均匀程度 ,消除液晶显示器的底色差异具有一定的意义。实验所得图像为从事液晶显示器的工程技术人员提供了清晰的衬垫料图像 ,为排除衬垫料的不均匀因素所造成的液晶屏的质量问题提供了依据。     

纸状显示器

常见的显示器有阴极射线管和液晶显示器 ,它们已分别应用在示波器、电视机、计算机、计算器、通信设备 (雷达、呼机、手机等 )等方面 .此外 ,还有等离子体显示器 ,用这种显示器做成的电视机 ,整机厚度只有大约 3— 4ｃｍ .最近 ,日本佳能公司的工程技术人员研制出了纸状显示器 .所谓纸状显示器就是一种薄如纸、柔性大的反射式显示器 ,它所显示的图像在没有电源输入时仍能存在 .这种显示器的显示机制 ,依据的是电泳现象 .研究人员想把常规的显示器(液晶显示器、阴极射线管 )的优点和这种纸状显示器的优点结合起来 .这类显示器已有人提出过并…     

液晶多色显示器

据报道日本理化学研究所微波物理研究室最近研制出能配成各种颜色的液晶多色显示器。 用液晶作显示器是目前各国正在研究的课题。然而实用的仅有美国RCA公司的动态散射型液晶显示器。它是利用在外加电场时,液晶变成乳白色这一性质进行显示文字、数字的装置。这种方式响应速度快(10     

液晶面板取向层与液晶层界面的电荷累积效应分析

TN模式的电荷累积缺陷,是液晶显示器生产中一个相当棘手问题。由于累积电荷量难于定量测量来进行研究,所以该问题一直悬而未决。着重分析了液晶显示器电荷累积缺陷,发现当它们介电常数与电导率的比值相差越大,电荷积累值越大;当取向层的介电常数与电导率的比值和液晶的不相等时,二者的交界面将产生电荷积聚;并且发现当取向层的介电常数与电导率的比值和液晶的相等时,二者的交界面将不产生电荷积聚,图像残留、显示速度减慢等问题也就可以消除。     

彩色电视液晶显示器的发展

本文从液晶显示器原理出发，阐述了矩阵型液晶显示器原理，重点介绍当今普遍采用的有源矩阵驱动型液晶显示器．液晶显示不仅用于符号、数字、文字等显示，还用于图象显示．诚然，图象显示的难度是大一些，但是近来已有长足的进步．本文介绍了用于彩色电视的液晶显示，最后介绍了１４英寸彩色电视液晶显示器的概况．     

硅薄膜晶体管液晶显示器的发展

在当前迅速发展的液晶显示技术中,薄膜晶体管液晶显示器以其大容量、高清晰度和高品质全真彩色[1]受到人们的广泛青睐.薄膜晶体管液晶显示器的显示质量和整体性能在很大程度上取决于薄膜晶体管性能,薄膜晶体管(TFT)是众多场效应晶体管(FET)中的一种[2].非晶硅用于制作薄膜晶体管液晶显示器技术的成熟,使非晶体薄膜晶体管液晶显示器在薄膜晶体管液晶显示器的市场中占据了主导地位,而非晶硅薄膜晶体管由于其低迁移率、电导率[3]等性能,严重制约了薄膜晶体管液晶显示器的发展,寻找合适的替代品,追求高迁移率和高电导率一直是研究人员关注的焦点,在此基础上,多晶硅、微晶硅相继发展,虽然在一定程度上暂时解决了迁移率、电导率低的问题,但因多晶硅、微晶硅的价格昂贵、材料短缺,因而未能动摇非晶硅的主导地位.随后的纳米硅薄膜晶体管液晶显示器依靠其本身具有高电导率、高迁移率[4-6]的优越性以及当前纳米技术的进展而成为一个引人注目的新亮点.     

透反区响应时间相等的双盒厚透反液晶显示器

提出了一种透反区响应时间相等的双盒厚透反液晶显示器。该透反液晶显示器在透射区采用了强锚定能边界条件,以缩短其响应时间;在反射区采用了弱锚定能边界条件,以增加其响应时间;采用过压驱动技术,使透反区的响应时间相等。分析了该透反液晶显示器的结构和原理,设计了透射区和反射区的边界锚定能,计算了响应时间和电光特性,得到了透反区响应时间相等,且具有良好电光特性的双盒厚透反液晶显示器。     

液晶相息图用于光学检测

根据液晶的动态响应和位相调制特性,研究了一种利用液晶显示器进行光学检测的检测方法.实验中,把液晶显示器改造为纯位相的空间光调制器,并测定了它的位相调制特性.实验测得：改造后的液晶显示器可实现1 λ(λ=632.8 nm)的调制量.通过引入相息图的方法,实现了液晶空间光调制器的大位相调制量.并产生了调制量为3.4 λ的球面波.最后,利用液晶显示器检测了凸透镜的前表面.检测结果发现,干涉条纹为平行直条纹且PV值为0.32λ.     

液晶显示器颜色特征化的分段分空间模型

为了提高液晶显示器(LCD)颜色特征化精度,根据液晶显示器色品恒定性和通道独立性较差的特点,提出了分段分空间模型。该模型首先用分段二次多项式拟合单通道驱动值和三刺激值的关系,然后再根据不同RGB子空间的颜色特性加上适当的干扰项对液晶显示器进行颜色特征化。实验结果表明,在训练样本和检验样本数分别为91和512时分段分空间模型的CIELAB平均色差为1.5881,最大色差为6.0249;通过与三维查找表、Mask、S-Curve及TPC模型的比较研究,验证了当训练样本数不多时分段分空间模型的颜色预测精度最高。     

一种互补——MOS片驱动的液晶显示器——阈值电压低,对比度高

日本日立公司日立研究实验室研制出一种新的液晶显示器,阈值电压底,对比度高是其两个特点。当用于电池或计算器时,该器件能有效地由互补—MOS片直接驱动。这种显示器的阈值电压约为5V,当电压为与互补—MOS片匹配的8V那一档时,达到了60∶1的峰值对比度。 新器件用的液晶是在向列型混合液晶中加进约0.6％重量比的胆甾相液晶。这种液晶配方导致光散射机构的改变,从而降低阈值电压。在此以前,曾经在有记忆功能的显示器中用过向列型/胆甾型混合液晶,与它们相比,新器件所用的液晶中所注入的胆甾     

Polymer-based multi-layer conductive electrode film for plastic LCD applications

Thin films of polymer-based multi-layer conductive electrode to be used as a substrate for a plastic liquid crystal display (LCD) have been prepared by a DC magnetron roll-to-roll sputtering method. The conductive layer is composed of three layers, ITO/Ag/ITO or ITO/APC/ITO, where APC is Ag-Pd-Cu alloy, on the polymer substrate (Arton?), which has been treated with hard-coat and gas-barrier layers. The properties of the conductive electrode for the plastic LCD were the following: (1) sheet resistance is 6 Ω/square; (2) transparency is 88% at 550 nm; (3) H₂O gas permeation through the plastics is 0.35 g/m² in 24 h; (4) durability against solvents is good for 5% NaOH solution, IPA, methanol, NMP, acetone, etc.; (5) the irreversible shrinkage and the compaction rate are both less than 3 ppm/h after annealing for 100 h at 150 °C. Received: 22 January 2001 / Accepted: 30 January 2001 / Published online: 26 April 2001     

Electroless Ni-P coating preparation of conductive mica powder by a modified activation process

A modified activation process was developed for electroless Ni-P coating preparation of conductive mica powder. The electroless Ni-P coating process was modified by replacing the conventional sensitization and activation steps only using activation step with a Pd(II)-APTHS activator, which is a complex of Pd(II) ion with a derivate γ-aminopropyltrihydroxysilane (APTHS) from the hydrolysis of γ-aminopropyltriethoxysilane (APTES). The activated reaction progress and resulted Ni-P coating were characterized by XPS, SEM/EDX and TEM. Electroless nickel deposition was successfully initiated by this activation process. This activation process is very simple, and the obtained Ni-P deposits have the advantages of uniformity, continuity and densification. The average specific resistivity for the Ni-P coated mica powder was 4.85 × 10⁻² Ω cm.     

数显德拜相测量仪的研制

为测量X射线粉末衍射照片德拜弧,进而计算布拉格角,制作了一种数字显示测量仪器。该仪器用数字读出方式显示测量结果,适用于近代物理X光实验教学。     

共线存储实验及理论分析

以Ar^ 离子激光器共线输出多波长作为光源，以有机导电材料作样品，采用简并四波混频（DFWM）光路装置，实现了多重多波长共线读出实时和记汐存储，获得了良好的照片记录，观测并解释了存储间的竞争现象。     

无颗粒型银导电墨水的制备及其印刷成膜研究

以柠檬酸银为导电金属前驱体化合物,仲丁胺为络合剂,并添加乙醇调节粘度和表面张力等物性参数,制备了无颗粒型银导电墨水。该导电墨水可以采用凹版印刷方式印刷在PET片基上,并且在较低的热处理温度下即可获得导电性较好的银导电膜。利用X射线光电子能谱仪、同步热分析仪、红外光谱仪、X射线衍射仪、扫描电子显微镜和四探针测试仪对柠檬酸银、导电墨水以及银导电膜进行表征。结果表明导电墨水在132 ℃时残留质量即达到恒重,远低于柠檬酸银的210 ℃;经150 ℃热处理之后,银导电膜由均匀致密、纯度高的纳米银颗粒组成;经150 ℃热处理50 min后得到的银导电膜的方块电阻值为1.83 Ω·□-1。     

Preparation, characterization and microwave absorption properties of electroless Ni-Co-P-coated SiC powder

Silicon carbide particles reinforced nickel-cobalt-phosphorus matrix composite coatings were prepared by two-step electroless plating process (pre-treatment of sensitizing and subsequent plating) for the application to lightweight microwave absorbers, which were characterized by scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), vibrating sample magnetometer (VSM) and vector network analyzer, respectively. The results show that Ni-Co-P deposits are uniform and mixture crystalline of α-Co and Ni₃P and exhibit low-specific saturation magnetization and low coercivity. Due to the conductive and ferromagnetic behavior of the Ni-Co thin films, high dielectric constant and magnetic loss can be obtained in the microwave frequencies. The maximum microwave loss of the composite powder less than −32 dB was found at the frequency of 6.30 GHz with a thickness of 2.5 mm when the initial atomic ratio of Ni-Co in the plating bath is 1.5.     

表面具有光栅结构的sol-gel薄膜制备及衍射效率的研究

介绍了一种在 sol- gel薄膜表面形成光栅结构的方法。用扫描电子显微镜 (SEM)表征了薄膜的表面形貌 ,用原子力显微镜 (AFM)测量了光栅结构的深度。测试了这种结构表面的衍射特性 ,并对结果进行了分析     

A promising approach to conductive patterns with high efficiency for flexible electronics

A promising approach for conductive patterns with high efficiency for flexible electronics was developed by direct-writing, silver(I) solution (silver nitrate, acetate silver, etc.) with no solid particles as a conductive ink, conductive pen as a writing implement, and polyimide (PI) film as a substrate. The physical properties of the conductive ink were investigated by a dynamic contact angle system, ubbelohde viscometer and surface tension instrument. Conductive properties of silver ink film were investigated by 4-point probe, scanning electron microscope (SEM) and surface profilometer. It is demonstrated how the design of solvent composition in conductive ink affects surface morphology, and conductivity of silver ink films. It can be obtained that conductive patterns drawn on PI substrate not only have good mechanical/electrical fatigue properties, but also have low resistivity. Especially, when the sintering condition is 200 °C for 60 min, the resistivity can be down to 6.6 μΩ cm, 4.25 times the silver bulk resistivity.     

柔性PDLC的实验规律

以制作性能良好的柔性PDLC为目标,从材料的选取、制作过程和电光特性等方面进行了研究。电极和聚合物选用柔性的ITO导电膜和紫外固化光学胶NOA65,液晶为向列相液晶混合物P0616A,采用紫外光聚合法,制作出具有柔性的聚合物分散液晶PDLC;测试了不同膜厚和混合比下的PDLC的电光特性和其光谱响应;从而得出了关于柔性聚合物分散液晶PDLC的一些实验规律和结论