Board with cholesteric layer and display having the board

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

Reexamination Certificate

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Details

C349S098000, C349S113000, C349S114000, C349S106000

Reexamination Certificate

active

10250650

ABSTRACT:
In view of the above problems of the prior art, the present invention has been made, and an object of the present invention is to provide a board, which is free from coloring, has high color tone quality, can realize a bright display screen, and imposes no significant restriction on the provision of an electric circuit, and a display device comprising the board, and further provides a liquid crystal display board, which is excellent in color contrast between transmission display and reflection display, and a semi-transmission color liquid crystal display device comprising the liquid crystal display board. A board according to the invention comprises a light transparent substrate and a cholesteric layer provided on the substrate and provided with an optical window of a predetermined pattern.

REFERENCES:
patent: 6025899 (2000-02-01), Fukunaga et al.
patent: 6300929 (2001-10-01), Hisatake et al.
patent: 6727967 (2004-04-01), Nakamura et al.
patent: 2001/0050739 (2001-12-01), Jung
patent: 2003/0210369 (2003-11-01), Wu
patent: 2004/0145691 (2004-07-01), Kubota et al.
patent: 2005/0036086 (2005-02-01), Kim et al.
patent: 1 267 198 (2002-12-01), None
patent: 2000-162590 (2000-06-01), None
patent: 2000-193962 (2000-07-01), None
patent: 2000-275631 (2000-10-01), None
patent: 2002-207227 (2002-07-01), None
patent: 2002-267830 (2002-09-01), None
patent: 2002-365623 (2002-12-01), None
U.S. Appl. No. 09/418,602.
Bass, M., “Handbook of Optics”, vol. 1, Chapter 42, p. 42.3-42.6, Optical Properties of Films and Coatings, Optical Society of America, USA.

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