Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1995-11-13
1999-10-05
Dang, Hung X.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349116, 349143, G02F 1136, G02F 1137, G09F 1137
Patent
active
059632828
ABSTRACT:
A liquid crystal display device (10) capable of displaying dark characters on a light background, for example a paper white type display, having an LC medium (20), such as PDLC material, switchable between a state in which ambient light incident on one side is back scattered towards a viewer and a state in which incident visible light is transmitted through the medium to a light absorber at the other side so that a viewer perceives a dark display, and in which a photovoltaic structure (25) is used as the light absorber for generating an output voltage in response to the visible light transmitted thereto. In equipment such as a portable computer or the like, the generated power can be utilised to supplement a battery power supply (45).
REFERENCES:
patent: 4095217 (1978-06-01), Tani et al.
patent: 4940313 (1990-07-01), Hamatani
patent: 5160920 (1992-11-01), Harris
West et al., "P-49: Polymer-Stabilized Cholesteric Texture Materials for Black-on-White Displays", SID 94 Digest, pp. 608-610, 1994.
Dang Hung X.
Duong Tai V.
Kraus Robert J.
U.S. Philips Corporation
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