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US4883343A
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Liquid crystal display element having a Cr2 O3 thin film for preventing dazzlement
Assignee: Alps Alpine Co Ltd
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Filing: 1988-03-25
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Granted: 1989-11-28
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Expires: 2008-03-25
Abstract
Abstract A liquid crystal display element having a liquid crystal cell formed by bonding a pair of transparent substrates, and a polarizing plate disposed at least outside of the transparent substrate of display surface comprising a Cr 2 O 3 thin film formed 300 to 1000 Angstroms thick on the outer surface of the transparent substrate of the display surface. Thus, the liquid crystal display element can effectively prevent a dazzlement due to the reflection of an external light on the surface of a transparent substrate of display surface side.
Inventors
- 👤 Toshiyuki Teshirogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:10
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133502
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
50 words
A liquid crystal display element having a liquid crystal cell formed by bonding front and rear transparent substrates, and a polarizing plate disposed on a display surface of the front transparent substrate comprising a Cr 2 O 3 thin film disposed on the display surface of the front transparent substrate.
Claim 2
Dependent Claim
50 words
A liquid crystal display element having a liquid crystal cell formed by bonding front and rear transparent substrates, and a polarizing plate disposed on a display surface of the front transparent substrate comprising a Cr 2 O 3 thin film disposed on the display surface of the front transparent substrate.
Claim 3
Dependent Claim
30 words
A liquid crystal display element according to claim 1, wherein the thickness of the thin film of Cr 2 O 3 is in a range of 300 to 1000 Angstroms.
References Cited (Backward Citations)
GB1385448A
Cited
US4139278A
Cited
GB2064805A
Cited
US4456336A
Cited
US4683183A
Cited
US4741603A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |