Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1998-11-06
2000-08-22
Dudek, James A.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349113, 349117, G02F 11337
Patent
active
061080640
ABSTRACT:
A reflective-type liquid crystal display device in accordance with the present invention includes: a first substrate including a light-reflective electrode; a transparent second substrate including a transparent electrode; a nematic liquid crystal layer, sandwiched between the first and second substrates, having negative dielectric anisotropy, and twisting with application of a voltage; a plurality of optical retardation compensation plates disposed on a light-entering side of the second substrate; and a polarizer plate disposed on the light-entering side of the second substrate, wherein surfaces of the first and second substrates undergo substantially vertical alignment processing, and liquid crystal has a natural pitch p, a layer thickness d, and a refractive index differece .DELTA.n with respect to characteristic polarization thereof selected so as to satisfy 0<.vertline.d/p.vertline.<1 and 135 nm.ltoreq..DELTA.n.times.d.ltoreq.1200 nm. Moreover, liquid crystal molecules on a surface of at least one of the first and second substrates tilt 3.degree. to 30.degree. with respect to a normal direction of that substrate. With this arrangement, a color-display-capable reflective-type liquid crystal display device with high contrast and excellent viewing angle characteristics can be obtained. Especially, such a reflective-type liquid crystal display device could be suitably applied to a liquid crystal display device with an integral pressure sensitive input device, provided with a touch panel.
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32.1: High-Brightness Projection Displays Using Mixed-Mode Twisted-Nematic Liquid-Crystal Cells. S.-T. Wu, C.-S. Wu, Hughes Research Laboratories, Malibu, CA. SID 96 Digest, pp. 763-766.
LP-F: A New Reflective Display with High Multiplexibility and Gray Scale Capability, Hidehiro seki and Motomitsu Itoh. Hachinohe Institute of Technology, Aomori 031, Japan. Euro Display '96, pp. 464-467.
Minoura Kiyoshi
Mitsui Seiichi
Okamoto Masayuki
Dudek James A.
Sharp Kabushiki Kaisha
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