共查询到20条相似文献,搜索用时 93 毫秒
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介绍了一种新的能实现反射-透射可调的液晶显示器件制作技术,它是由相变型宾主(PCGH)效应层和一聚合物分散液晶(PDLC)层直接结合构成的。当施加的电压增加时,PCGH层首先被驱动,而PDLC由于需要更高的阈值电压没有被驱动,仍保留散射态,它充当散光板的作用,因此可获得一黑白的反射显示态。当施加足够高的电压时,不仅PCGH层被驱动,而且PDLC层也能被驱动,于是PDLC对光的散射能力被消除,可获得一透射显示态。结果表明,两态显示都能实现适宜的对比度,具有高亮度,宽视角的显示。 相似文献
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扭曲向列型(TN)和超扭曲向列型(STN)LCD,包括有源和无源矩阵,都有一个共同的缺点,即视角狭窄;审液晶材料的电光特性所造成的。现已开发出一种展宽LCD视角的新方法,这一LCD新的工作原理在解决其视角狭窄的问题时,对于LCD显示器件而言,不是从其内部着手而是从其外部着手,本文将描述这种新型设计的各关键元件的工作原理。 相似文献
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研究了不同的环境光照下,相邻像素的选通态对LCD透射屏测量对比的影响。结果表明:1.不同的照明条件下LCD透射屏的对比度会发生很大的变化,但相邻像素的选通态对测量对比度的影响始终存在;2.与LCD反射屏相比,透射屏中相邻像素的选通态对测量对比的影响,主要来自杂散光。 相似文献
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我们优化了全息高分子分散型液昌(HPDLC)彩色反射工显示 材料及制作过程,成功的研制出高反射率的快速响应HPDLC。通过选择液晶和高分子材料以及添加表面活性剂,使其驱动电压降低了一半。我们还发明了一种扩大HPDLC视角的新技术。叠加红,绿蓝一色HPDLC所作出的彩色样品,具有迄今为止最宽广的色彩范围。 相似文献
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超声波油罐液位测量仪 总被引:2,自引:0,他引:2
介绍一种利用超声波反射的方法设计的储油罐液位测量仪,该仪器采用超声波专用集成电路LM1812和单片机AT89C2051构成,它可以连续在线测量油罐的液位,并就地显示数据;在可利用串行通讯(RS-232)进行远程数据通讯。 相似文献
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通过对相邻像素的投影和杂散光的研究,很好地解释了 L C D 像素的形状和大小与对比度和视角特性的关系,并指出当 L C D 器件在 Cr > 1 的有效显示区中,其大像素的对比度比小像素的大,同时也强调了相邻像素的选通态对 L C D 测量结果的影响。 相似文献
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电控双折射盒中指向矢分布的计算 总被引:13,自引:6,他引:7
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。 相似文献
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The flowering of flat displays 总被引:1,自引:0,他引:1
《Spectrum, IEEE》1997,34(5):40-49
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 相似文献
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《Display Technology, Journal of》2008,4(4):415-423
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本文介绍了低温TN式GH-LCD的简要设计、工作原理、低温性能的实现及测量结果,指出了存在问题。 相似文献
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The reflection properties of a phase modulating planar structure are examined. The structure consists of an active microwave screen placed in front of a conducting surface. Switching the screen between fully transparent and totally reflective states results in a phase modulated reflected signal with reduced energy at the illuminating frequency. Both single and multilayer configurations are examined 相似文献
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Zhibing Ge Meizi Jiao Ruibo Lu Wu T.X. Shin-Tson Wu Wang-Yang Li Chung-Kuang Wei 《Display Technology, Journal of》2008,4(2):129-138
A simple wide-view and broadband circular polarizer comprising of a linear polarizer and two uniaxial films is proposed to enhance the viewing angle of transflective liquid crystal displays (LCDs). For the transmissive mode, over the entire 90deg viewing cone, the normalized light leakage from two stacked circular polarizers is suppressed to below 1.5times10-2, and contrast ratio over 10:1 is obtained using a normally black vertically aligned transflective LCD. At the same time, this configuration warrants a broadband operation and reasonably good viewing angle (10:1 contrast ratio is over 40 at all directions) for the reflective mode. The physical mechanisms for achieving broadband operation and wide viewing angle are discussed. 相似文献
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Flat panel display technologies for portable and personal information systems are reviewed. The display sub-system performance requirements, and the metrics for evaluating display technologies for portable systems are discussed. The current display technology choices for high performance portable systems are active matrix liquid crystal display (AMLCD) and field emitter display (FED). AMLCD is at the forefront at an advanced state of development, and it is already in mass production for notebook computer applications. Because of the huge market size, AMLCD technology continues to be developed at an aggressive pace to address the needs of the future portable systems. On the other hand, FED technology is not currently in mass production, but it is being developed at rapid pace; Impressive technology capabilities and demonstration displays have already been shown. This review focuses on the current status and future development trends in both the these display technologies for application to portable systems. The current status of the reflective LCDs and their future development trends are also reviewed. 相似文献