Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-07-04
2006-07-04
Dudek, James A. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S129000
Reexamination Certificate
active
07072014
ABSTRACT:
A reflection-type liquid crystal display device, including a first substrate, a second substrate disposed so as to face the first substrate, with the second substrate carrying projections and depressions having a reflectivity, a liquid crystal layer having any of positive or negative dielectric anisotropy provided between the first and second substrates, and a polarizer disposed at an outer side of the first substrate. The device also preferably includes an optical phase compensation film disposed between the first substrate and the polarizer, with the optical phase compensation film having a negative dielectric anisotropy in a direction perpendicular to a plane of the first substrate. The optical phase compensation film also preferably has a retardation df{(nx+nz)/2−nz} so as to satisfy the relationship 0.4≦[df{(nx+ny)/2−nz}]/(dlcΔn)≦0.7, wherein nx, nyand nzare refractive indices of the optical phase compensation film respectively in an x-direction, a y-direction and a z-direction, dlc is the thickness of the liquid crystal layer, and Δn is a refractive index difference between an extraordinary ray and an ordinary ray in the liquid crystal layer.
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Ohmuro Katsufumi
Sugiura Norio
Tashiro Kunihiro
Dudek James A.
Greer Burns & Crain Ltd.
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