具有影像增强反射层的全彩色透反射型胆甾相液晶显示器

本文介绍了一种低功耗全彩透反射型液晶显示器。该液晶显示器利用高双折射率(Δn)胆甾相液晶(Ch-LC),并在透射区域的顶部设置了一块影像增强反射层(IER)。高双折射率(Δn)胆甾相液晶能够反射宽波段的光而显示白色图像。采用传统的彩色滤光膜方法就可以显示全彩色图像。此外,在透射区顶部的IER为透射光和反射光提供了相似的光路。在任何环境下,透射区与反射区总是显示相同的图像颜色,因而大大提高了全彩色透反射型胆甾相液晶显示器显示图像的质量。     

反射式柔性彩色胆甾相液晶显示器的新进展

介绍了高柔性分层全彩色胆甾相液晶显示器,它采用分相封装构建在超薄基底上,同时展示了胆甾相液晶显示技术态势的新进展     

一种反射式胆甾相液晶显示器研究

反射式胆甾相液晶显示是近年来显示器研究的热点。它具有低功耗、零电场下图象保存时间长等优点,是公认的未来的纸质书、报纸的替代品。本文在前人研究的基础上,提出了一种多色的反射式胆甾相液晶显示器结构,并进行光学仿真,结果表明,这种两层结构的胆甾相液晶显示器具有视角大、亮度高等特点,具有很好的应用前景。     

BCD液晶显示器的应用

BCD--Bistable CholestericDisplay(双稳态胆甾相液晶显示器).采用了新型的液晶材料,不同于传统的STN技术,具有状态的存储效应.该显示器属于高对比度的反射型显示器. 　　……     

胆甾相液晶场致织构变化的偏光显微镜观测

介绍胆甾相液晶的织构和显示应用，给出胆甾相液晶几种织构的偏光显微镜图像。该图像对认识胆甾相液晶的各种织构，理解胆甾相液晶在双稳态显示器的应用原理具有一定的意义。     

胆甾型液晶显示技术和产业发展

以未来三年电子纸市场巨大的发展空间为切入点,分析了现阶段几种柔性显示技术的优势和劣势,认为胆甾型液晶显示在功耗、彩色化、对比度和抗震性等方面具有优势,但成本恐将成为其发展瓶颈。从全球来看,胆甾型液晶的研究和产业化主要集中在国外,国内高校和研究机构还停留在基础研究阶段。介绍了复旦大学在胆甾型液晶领域的研究成果,并结合我国产业环境及柔性显示产业发展特性给出三点发展建议。     

单层超宽带反射型偏振片

介绍一种通过分子工程，利用胆甾相液晶制成单层超宽非吸收型偏振的最新技术。这项新技术的基础是依据聚合诱导分子再分布的机理，实现胆甾相液晶在空间的非线性螺距分布。     

不需背光源的TN/STN型彩色液晶显示器

口本卡西欧计算机公司生产的首批产品之一，反射式扭曲向列型和超扭曲向列型彩色液晶显示器（TN／STNLCD）不需要背光源。该产品是卡西欧公司销售战略重点产品——彩色液晶显示器的一部分，它可用于便携式装置中。由于生产厂家最近研制成功较为简单的氧化钢锡（ITO）薄膜生产技术，可使STN型彩色液晶显示器免除了一些生产步骤。STN型彩色液晶显示器可用于消费类装置。这两种产品将在秋季前期应市。该公司将于5月份推出衬底为03mm厚的玻板、可使重量降低、清晰度提高的显示器。不需背光源的TN/STN型彩色液晶显示器@吴铭…     

胆甾型液晶彩色滤光片分析

计算了掺有周期性介质层的胆甾型液晶(CLC)膜的反射光色品值,分析了该膜用于滤光片的可行性。首先利用Jones矩阵法对其反射光谱进行了数值计算,然后分析和比较了掺入周期性介质前后液晶膜的CIE-1931色品图。从数值计算可知,在适当的液晶和介质厚度比例下,改变斜入射角度对掺有周期性介质层的反射式胆甾型液晶滤光片的反射光色品值改变不大,可以起到窄带滤光片的作用。     

聚合物稳定的双稳态胆甾液晶显示器的电光特性

将一种具很高黏度系数的聚合物单体以不同的百分比浓度掺入到胆甾液晶中,形成不同聚合物网络稳定的双稳态胆甾液晶显示器件。本文主要针对它们的反射光谱特性及阈值电压特性进行测试分析,并联系其中聚合物网络的结构形态,分析得出了此种聚合物单体所形成的聚合物网络对双稳态胆甾液晶显示特性的影响关系。     

Synthesis and Properties of Photoisomerizable Derivatives of Isosorbide and Their Use in Cholesteric Filters

This paper describes the synthesis of photoisomerizable derivatives of isosorbide. These derivatives contain a stilbene or cinnamate moiety and can therefore be used as photoisomerizable chiral compounds in cholesteric liquid‐crystalline mixtures. The reflection wavelength of cholesteric layers made from these mixtures is increased by UV irradiation due to the fact that the Z‐isomers of these derivatives exhibit a lower helical twisting power than the corresponding E‐isomers. The cinnamate derivatives are very suitable for use in cholesteric color filters that find application in liquid‐crystal displays.     

The cholophor: A passive polarization-switched liquid crystal screen for multicolor laser displays

Cholophors are passive polarization-switched color display elements suitable for use with lasers or white light. Their hybrid structure, consisting of a thin layer of cholesteric liquid crystal over a layer of photoluminescent phosphor, provides properties of particular interest for large-screen optically scanned multicolor display applications. Cholophors permit more efficient use of available laser power while providing a solution to the problem of color registration for two-primary displays and a partial solution for three-primary displays. Two-primary or Land-color displays can be obtained with only one color of laser light and three-primary displays with only two colors. A three-primary cholophor display using a single argon ion laser would have over 7 times the efficiency of a typical state-of-the-art system using an argon-krypton mixed-gas laser. The liquid crystal layer provides polarization selectivity, and the phosphor layer produces the additional color not furnished by the laser. The liquid crystal transmits one sense of laser polarization while totally reflecting the other, thereby permitting polarization selective excitation of the underlying phosphor. The color selection information is coded into the polarization of the incident laser beam.     

电场对负性介电常数各向异性的小分子胆甾相液晶的作用

介绍和总结了边界条件影响很大的受限胆甾相和聚合物分散小分子胆甾相液晶（PDCLC）两种情况下，外电场对负性介电常数各向异性的小分子胆甾相液晶的作用。前者的研究通过在不变螺距p情况下改变液晶盒鹌鹑d与外电场电压值E，发现了规律性变化的液晶相的相态结构。而对PDCLC的研究中，通过平行和垂直于电场方向的观察，得到了胆甾相变化与外加电压的具体关系，以及在彩色液晶显示上应用。     

Matrix-addressed liquid-crystal display

In order to develop simple low-cost liquid-crystal matrix displays, 5 × 7 dots alphanumeric matrix display panels with 7 × 80 elements have been made and tested. A newly synthesized nematic liquid crystal, p-methoxy-p'-ethylazoxybenzene, was used in the panels as the major component of the liquid crystals. The crosstalk was found effectively suppressed by rubbing the surfaces of electrode glasses besides applying a blanking technique. Furthermore, storage-type liquid-crystal matrix display devices with 120 × 120 elements were also reported. Various mixtures of nematic and cholesteric liquid crystals were used depending upon the storage and erasing conditions required for the imaging.     

The flowering of flat displays

The author describes how new and improved display technologies are giving electronics a fresh look. Active-matrix liquid crystal displays (LCDs) with improved image quality and larger viewing angles are on the verge of replacing CRTs, while reflective displays (with very low power consumption) and cholesteric displays (which need no power to retain an image) are making new portable products possible     

液晶盒边界效应对胆甾相液晶电控螺距的影响

研究了共面转换(IPS)液晶盒处于强锚定及弱锚定两种边界状态时横向电场与平面织构胆甾相液晶螺距的关系,探讨了液晶盒表面锚定对胆甾相液晶电控螺距的影响。理论结果表明,共面转换模式下电场可以调谐胆甾相液晶的反射光颜色,而边界锚定效应对电场调谐螺距有显著影响。这一结果为基于电控螺距原理的胆甾相液晶反射式彩色显示方案提供了理论上的依据。