Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1995-10-12
1998-08-18
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349117, 349 96, 349121, G02F 11335
Patent
active
057964572
ABSTRACT:
A TN type liquid crystal cell is interposed between a pair of polarization plates. First and second retardation films each having slow axes orthogonal to each other are disposed between one of the polarization plates and the liquid crystal cell. The product .DELTA.n.sub.1 .times.d.sub.1 of the refractive index anisotropy .DELTA.n.sub.1 and the thickness d.sub.1 of the first retardation film on the side of one of the polarization plates is set to a value greater than the product .DELTA.n.sub.2 .times.d.sub.2 of the refractive index anisotropy .DELTA.n.sub.2 and the thickness d.sub.2 of the second retardation film. The viewing angle of the liquid crystal display panel in the left-right direction is expanded by this arrangement.
REFERENCES:
patent: 5184236 (1993-02-01), Miyashita et al.
patent: 5227903 (1993-07-01), Miyazawa et al.
patent: 5396355 (1995-03-01), Wada et al.
patent: 5440413 (1995-08-01), Kikuchi et al.
Takigawa Mitsuru
Ukai Yasuhiro
Unate Takao
Hosiden Corporation
Ngo Julie
Sikes William L.
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