Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-07-18
2006-07-18
Ngo, Huyen (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S098000, C349S106000
Reexamination Certificate
active
07079207
ABSTRACT:
A liquid crystal display improves light utilization efficiency with a cholesteric liquid crystal filter to ensure color density enough to enable both transmission and reflection type displays. The display comprises a liquid crystal display device comprising a liquid crystal layer between transparent substrates, a voltage applying electrode, a driving circuit, an illumination light source, and a pair of circularly polarizing plates. A cholesteric liquid crystal filter semitransparent to red, green and blue wavelength ranges is located on the illumination light-directing side. The liquid crystal layer viewing side has a cholesteric liquid crystal color filter array capable of transmitting red, green and blue wavelength ranges and reflecting light in other wavelength ranges depending on a pixel arrangement, and absorption type color filter array is located in alignment therewith and capable of transmitting only red, green and blue wavelength ranges and absorbing light in other wavelengths.
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Dai Nippon Printing Co. Ltd.
Dellett & Walters
Ngo Huyen
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