EP0246842A2
Expired / Lapsed
EP
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A liquid crystal display device
Assignee: Seiko Epson Corp
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Filing: 1987-05-18
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Granted: —
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Expires: 2007-05-18
Abstract
Abstract A liquid crystal display device comprising a liquid crystal cell (6) formed of a twist nematic liquid crystal (9) positioned between two electrode substrates (7,8) and a pair of polarisers (1,10) which are located one on either side of the liquid crystal cell (6), characterised in that at least one layer (5) of an optically anisotropic substance is provided between the pair of polarisers (1,10) in addition to the twist nematic liquid crystal (9).
Inventors
- 👤 Hiroshi Wada
- 👤 Shinji Wada
- 👤 Chiyoaki Iijima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 21:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/1396; G02F1/1397; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133636; G02F1/1347; G02F1/13471; G02F2413/00; G02F2413/15
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A liquid crystal display device comprising a liquid crystal cell (6) formed of a twist nematic liquid crystal (9) positioned between two electrode substrates (7,8) and a pair of. polarisers (1,10) which are located one on either side of the liquid crystal cell (6), characterised in that at least one layer (5) of an optically anisotropic substance is provided between the pair of polarisers (1,10) in addition to the twist nematic liquid crystal (9).
Claim 2
Dependent Claim
74 words
A liquid crystal display device comprising a liquid crystal cell (6) formed of a twist nematic liquid crystal (9) positioned between two electrode substrates (7,8) and a pair of. polarisers (1,10) which are located one on either side of the liquid crystal cell (6), characterised in that at least one layer (5) of an optically anisotropic substance is provided between the pair of polarisers (1,10) in addition to the twist nematic liquid crystal (9).
Claim 3
Dependent Claim
27 words
A liquid crystal display device according to claim 1 characterised in that the optically anisotropic substance is a liquid crystal which is oriented between two opposite substrates.
Claim 4
Dependent Claim
22 words
A liquid crystal display device according to claim 1 characterised in that the optically anisotropic substance is in a polymeric film state.
Claim 5
Dependent Claim
36 words
A liquid crystal display device according to any one of the preceding claims characterised in that the optically anisotropic substance is twisted in a different direction from the twist direction of the twist nematic liquid crystal.
Claim 6
Dependent Claim
36 words
A liquid crystal display device according to claim 3 characterised in that if more than two layers of the optically anisotropic substance are used, the directions of light axes between at least two layers are different.
Claim 7
Dependent Claim
41 words
A liquid crystal display device according to claim 1 characterised in that each direction of each light axis on a surface adjacent to the twist nematic liquid crystal is substantially perpendicular to or is substantially parallel to the optically anisotropic substance.
References Cited (Backward Citations)
No citation records indexed.
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