US4043639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field effect type liquid crystal display elements provided with polarizing plates
Assignee: Hitachi Ltd
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Filing: 1976-06-25
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Granted: 1977-08-23
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Expires: 1996-06-25
Abstract
Abstract A field effect type liquid crystal display element is provided with polarizing plates. Each polarizing plate comprises a polarizing film consisting of polyvinyl chloride and supporting members bonded to both sides of the polarizing film and an ultraviolet ray absorbing agent is incorporated to either one of the polarizing film and the supporting members.
Inventors
- 👤 Sigeru Matsuyama
- 👤 Hironari Tanaka
- 👤 Masaharu Koyama
- 👤 Tadashi Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
In a field effect type liquid crystal display element of the type wherein a field effect type liquid crystal is interposed between a pair of spaced substrates provided with electrodes and polarizing plates are disposed on the outside of respective substrates, the improvement wherein each one of said polarizing plates comprises a polarizing film consisting essentially of polyvinyl chloride and supporting members bonded to the opposite sides of said polarizing film by a bonding agent, said polarizing plates containing an ultraviolet ray absorbing agent.
Claim 2
Dependent Claim
84 words
In a field effect type liquid crystal display element of the type wherein a field effect type liquid crystal is interposed between a pair of spaced substrates provided with electrodes and polarizing plates are disposed on the outside of respective substrates, the improvement wherein each one of said polarizing plates comprises a polarizing film consisting essentially of polyvinyl chloride and supporting members bonded to the opposite sides of said polarizing film by a bonding agent, said polarizing plates containing an ultraviolet ray absorbing agent.
Claim 3
Dependent Claim
23 words
The field effect liquid crystal display element according to claim 1 wherein said ultraviolet ray absorbing agent is incorporated into said supporting members.
Claim 4
Dependent Claim
23 words
The field effect liquid crystal display element according to claim 1 wherein said ultraviolet ray absorbing agent is incorporated into said bonding agent.
Claim 5
Dependent Claim
24 words
The field effect type liquid crystal display element according to claim 1 wherein said ultraviolet ray absorbing agent is incorporated into said polarizing film.
References Cited (Backward Citations)
US3869196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |