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1. 发明授权

US5018837A Enhanced contrast liquid crystal display device 失效
标题翻译：增强对比度液晶显示装置
公开(公告)号：US5018837A
公开(公告)日：1991-05-28
申请号：US375075
申请日：1989-07-03
申请人： John M. McKee , Joseph T. Downey
发明人： John M. McKee , Joseph T. Downey
IPC分类号： G02F1/13357
CPC分类号： G02F1/133615 , G02F2001/133616 , G02F2001/133626 , G02F2203/02
摘要： Known LCD devices of the type having an upper polarizer (36), a liquid crystal cell (28), a lower polarizer (38) and a reflector (42) and working using ambient light to provide illumination lose contrast because the light passes twice through both polarizers. By providing a layer of light concentrating plastic (44) between the upper polarizer (36) and the LCD cell (28), light emitted from bevelled edges (48) of an aperture (46) in the plastic is directed towards the cell and reflector directly, without passing through the upper polarizer (36). This is in addition to the normal ambient light passing through the front polarizer. This increases the intensity of light reaching the observer (20) and thus the contrast of the display.
摘要翻译：具有上偏振器（36），液晶单元（28），下偏振器（38）和反射器（42）的类型的已知LCD装置并且使用环境光进行照明以提供照明会损失对比度，因为光通过两次两个偏振器。通过在上偏振器（36）和LCD单元（28）之间提供一层聚光塑料（44），从塑料中的孔（46）的斜边（48）发射的光被引向单元和反射器直接地，不通过上偏振器（36）。这是通过正偏振器的正常环境光之外的。这增加了到达观察者（20）的光的强度，从而增加了显示器的对比度。

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