A High Contrast and High Brightness Reflective LCD with an Internal Diffusive Reflector

概要

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We have developed a high contrast and high brightness reflective LCD with an internal diffusive reflector (IDR). The IDR is used in a single-polarizer configuration using mixed-mode twisted nematic (MTN) effect. The diffusive reflector, with proper design, is effective in yielding a bright reflective-image under collimated ambient light. The MTN mode is adopted for its high contrast and large tolerance to cell gap variation. The test cell shows contrast ratio over 40:1, response time less than 20 ms and reflectivity of 22% (when combined with micro color filters) relative to a Lambertian standard white, measured at display's normal direction under -30°collimated illumination.
社団法人電子情報通信学会の論文
1999-03-18