Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2002-02-12
2004-10-26
Parker, Kenneth (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S112000, C349S098000, C359S490020, C359S487030
Reexamination Certificate
active
06809782
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a diffusing/polarizing member which can inhibit coloration in viewing from a slantwise direction, can attain bright displays, and is suitable for use in, e.g., fabricating a reflective or semi-transmitting liquid crystal display.
BACKGROUND ART
Reflective or semi-transmitting liquid crystal displays have hitherto been known which employ a reflective polarizer comprising a linearly polarized light separator or circularly polarized light separator which separates incident natural light into a reflected light consisting of a polarized light and a transmitted light. However, these liquid crystal displays have had a problem that when they are viewed from a slantwise direction, white or black pictures assume a color.
The coloration in the case of a linearly polarized light separator is attributable to the scattering caused by a birefringent multilayered film. In the case of a circularly polarized light separator, the coloration is attributable to difficulties in maintaining the parallelism of the axis of polarization and the axis of retardation of a quarter wavelength plate in all directions.
An aim of the invention is to develop a diffusing/polarizing member which enables the fabrication of a reflective, semi-transmitting, or another liquid crystal display reduced in display unevenness, e.g., coloration in viewing from a slantwise direction.
DISCLOSURE OF THE INVENTION
The invention provides a diffusing/polarizing member, characterized in that it comprises a laminate of a reflective polarizer which separates incident natural light into a reflected light comprising a polarized light and a transmitted light, and a diffusing layer, and the reflective polarizer and the diffusing layer, when viewed from a slantwise direction, have respective colors which are complementary. The invention further provides liquid crystal displays, characterized by having the diffusing/polarizing member.
REFERENCES:
patent: 6067136 (2000-05-01), Yamaguchi et al.
patent: 6147733 (2000-11-01), Miyamoto et al.
patent: 6300989 (2001-10-01), Iijima
patent: 6384884 (2002-05-01), Nakamura et al.
patent: 6421148 (2002-07-01), Steiner
patent: 6580483 (2003-06-01), Suzuki et al.
patent: 6611305 (2003-08-01), Kamijo et al.
patent: 4-204402 (1992-07-01), None
patent: 11-125817 (1999-05-01), None
patent: 11-160508 (1999-06-01), None
patent: 11-183712 (1999-07-01), None
patent: 11-231131 (1999-08-01), None
patent: 11-237502 (1999-09-01), None
patent: 11-248910 (1999-09-01), None
patent: 11-281970 (1999-10-01), None
patent: 2000-147250 (2000-05-01), None
International Search Report.
Kameyama Tadayuki
Kawahara Satoru
Kawamoto Ikuo
Motomura Hironori
Nitto Denko Corporation
Parker Kenneth
Westerman Hattori Daniels & Adrian LLP
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