US4985285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display panel incorporating an optical phase shifting substrate
Assignee: Zacros Corp
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Filing: 1989-04-26
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Granted: 1991-01-15
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Expires: 2009-04-26
Abstract
Abstract A liquid crystal display panel incorporating an optical phase shifting substrate which comprises a liquid crystal cell, a pair of polarizing sheets disposed on opposing sides thereof, and a couple of substrates each having a transparent electrode layer, one of the substrates being either an optical phase shifting single oriented synthetic resin film or a laminate film comprising an optically isotropic amorphous film laminated to at least one side of the above optical phase shifting film and the other substrate being either a single-layer or multi-layer optically isotropic amorphous film or a glass sheet.
Inventors
- 👤 Rinjiro Ichikawa
- 👤 Kenji Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:08
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133305; G02F1/1335; G02F1/13363; C; C09; C09K; C09K2323/00; C09K2323/03; C09K2323/031; G02F1/133635; G02F2202/00; G02F2202/40; G02F2413/00; G02F2413/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A liquid crystal display panel incorporating an optical phase shifting substrate comprising: a liquid crystal cell formed of a first and second substrate having a super-twisted nematic liquid crystal sealed therebetween, each of said substrates supporting a transparent electrode; said first substrate being an optical phase shifting substrate having a retardation value of not less than 60 nm comprising either an oriented synthetic resin optical phase shifting film A or a laminate film consisting of said oriented synthetic resin film A and an optically isotropic amorphous film B disposed on at least one side thereof; said second substrate being an optically isotropic substrate comprising a single-layer or multiple-layer optically isotropic amorphous film having a retardation value of not more than 50 nm, or a glass sheet; and a pair of polarizing sheets disposed, respectively, on each side of said liquid crystal cell.
Claim 2
Dependent Claim
142 words
A liquid crystal display panel incorporating an optical phase shifting substrate comprising: a liquid crystal cell formed of a first and second substrate having a super-twisted nematic liquid crystal sealed therebetween, each of said substrates supporting a transparent electrode; said first substrate being an optical phase shifting substrate having a retardation value of not less than 60 nm comprising either an oriented synthetic resin optical phase shifting film A or a laminate film consisting of said oriented synthetic resin film A and an optically isotropic amorphous film B disposed on at least one side thereof; said second substrate being an optically isotropic substrate comprising a single-layer or multiple-layer optically isotropic amorphous film having a retardation value of not more than 50 nm, or a glass sheet; and a pair of polarizing sheets disposed, respectively, on each side of said liquid crystal cell.
References Cited (Backward Citations)
US4456638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |