US4418987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarizer arrangement for a significant improvement in viewing angle characteristic in a liquid crystal display
Assignee: Sharp Corp
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Filing: 1980-08-19
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Granted: 1983-12-06
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Expires: 2000-08-19
Abstract
Abstract A pair of polarizers are respectively attached to a pair of substrates forming a twisted nematic field effect mode liquid crystal display. An orientation control film is disposed on each of the pair of substrates to orient liquid crystal molecules of a liquid crystal material in a desired direction. Each of the pair of polarizers is attached to an outer surface of the respective substrates such that the plane of polarization of each of the polarizers is not in parallel with or perpendicular to a direction oriented by the orientation control film.
Inventors
- 👤 Hiroshi Takanashi
- 👤 Shoichiro Takahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/1396; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528; G02F1/133531
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A twisted nematic field effect mode liquid crystal display cell comprising: a liquid crystal layer; first and second substrates on opposite sides of said liquid crystal layer; first and second polarizers attached to respective outer surfaces of said first and second substrates, said polarizers having first and second planes of polarization; first and second orientation films formed on respective inner surfaces of said first and second substrates for orienting molecules of said liquid crystal layer in first and second orientation directions; wherein each of said planes of polarization is rotated with respect to one of said first and second orientation directions forming angles therebetween, said angles being greater than or less than zero degrees and greater than or less than 90 degrees.
Claim 2
Dependent Claim
122 words
A twisted nematic field effect mode liquid crystal display cell comprising: a liquid crystal layer; first and second substrates on opposite sides of said liquid crystal layer; first and second polarizers attached to respective outer surfaces of said first and second substrates, said polarizers having first and second planes of polarization; first and second orientation films formed on respective inner surfaces of said first and second substrates for orienting molecules of said liquid crystal layer in first and second orientation directions; wherein each of said planes of polarization is rotated with respect to one of said first and second orientation directions forming angles therebetween, said angles being greater than or less than zero degrees and greater than or less than 90 degrees.
Claim 3
Dependent Claim
18 words
A display cell as in claim 1 wherein at least one of said angles is substantially 5-15 degrees.
Claim 4
Dependent Claim
18 words
A display cell as in claim 1 wherein at least one of said angles is substantially 95-105 degrees.
Claim 5
Dependent Claim
18 words
A display cell as in claim 1, wherein at least one of said angles is substantially 7.5-10 degrees.
Claim 6
Dependent Claim
18 words
A display cell as in claim 1 wherein at least one of said angles is substantially 97.5-100 degrees.
References Cited (Backward Citations)
US3874163A
Cited
US3914022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |