Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-05-17
2009-12-08
Heyman, John (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S062000, C349S064000, C349S074000
Reexamination Certificate
active
07630037
ABSTRACT:
A single light guide plate illuminates both first and second liquid crystal display panels opposed to each other, the second liquid crystal display panel having a larger display area than that of the first liquid crystal display panel. A light-absorbing sheet is provided between the light guide plate and the first liquid crystal display panel to absorb light from the light guide plate and has a light-transmitting part aligned with the first liquid crystal display panel in a direction from the light guide plate toward the first liquid crystal display panel to transmit light from the light guide plate to the first liquid crystal display panel. A reflective polarizing sheet is provided between the second liquid crystal display panel and the light guide plate. The light-absorbing sheet eliminates brightness unevenness on the second liquid crystal display panel, which would otherwise occur due to the influence of the first liquid crystal display panel, and the reflective polarizing sheet allows effective utilization of light from the light guide plate.
REFERENCES:
patent: 6831711 (2004-12-01), Choi et al.
patent: 6897914 (2005-05-01), Yoshida
patent: 7301591 (2007-11-01), Akiyama
patent: 2005/0030727 (2005-02-01), Shimura
patent: 2005/0041179 (2005-02-01), Suzuki
patent: 2002-189230 (2002-07-01), None
Brinks Hofer Gilson & Lione
Citizen Electronics Co. Ltd.
Heyman John
LandOfFree
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