Patent US5247374A successfully refreshed from Google Patents.
US5247374A
Expired / Lapsed
US
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Liquid crystal display device with common heater between two cells
Assignee: Stanley Electric Co Ltd
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Filing: 1991-04-01
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Granted: 1993-09-21
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Expires: 2011-04-01
Abstract
Abstract A double-layered type while/black super-twisted liquid crystal display device including a driving cell and a compensating cell in a layered structure wherein a substrate having no optical anisotropy is interposed between the driving cell and the compensating cell and a heater is arranged on the substrate is disclosed. The heater is composed of two electric conductive films, one of them being deposited on one surface of the substrate and the other one being deposited on the opposite surface of the same. In addition, a liquid crystal display device of the foregoing type wherein a heater comprising a single electric conductive thin film is interposed between the driving cell and the compensating cell is disclosed. Each thin film constituting the heater is deposited by employing a vaporizing process. Alternatively, each thin film constituting the heater may be deposited by employing a spattering process.
Inventors
- 👤 Toshiyki Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347; G02F1/133382; G02F1/137; G02F1/139; G02F1/1396; G02F1/1397
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A layered white and black super-twisted nematic liquid crystal display device comprising: a driving cell and a compensating cell formed in a layered structure; a substrate having no optical anisotropy, said substrate having first and second surfaces, and substrate being interposed between said driving cell and said compensating cell; a common heater arranged on said substrate for heating both said driving cell and said compensating cell, said common heater including first and second electrically conductive thin films; and said first thin film being formed on said first surface of said substrate and said second thin film being formed on said second surface of the substrate.
Claim 2
Dependent Claim
105 words
A layered white and black super-twisted nematic liquid crystal display device comprising: a driving cell and a compensating cell formed in a layered structure; a substrate having no optical anisotropy, said substrate having first and second surfaces, and substrate being interposed between said driving cell and said compensating cell; a common heater arranged on said substrate for heating both said driving cell and said compensating cell, said common heater including first and second electrically conductive thin films; and said first thin film being formed on said first surface of said substrate and said second thin film being formed on said second surface of the substrate.
Claim 3
Dependent Claim
25 words
The liquid crystal display device according to claim 1, wherein at least one of said first and second thin films comprises a vapor deposited film.
Claim 4
Dependent Claim
24 words
The liquid crystal display device according to claim 1, wherein at least one of said first and second thin film comprises a sputtered film.
Claim 5
Dependent Claim
43 words
The liquid crystal display device according to claim 1, wherein said driving cell is positioned on a side of said substrate that faces an illumination light source and said compensating cell is positioned on a side of said substrate that faces an observer.
Claim 6
Dependent Claim
43 words
The liquid crystal display device according to claim 1, wherein said driving cell is positioned on a side of said substrate that faces an observer and the compensating cell is positioned on a side of said substrate that faces an illuminating light source.
Claim 7
Dependent Claim
59 words
A layered type white and black super-twisted nematic liquid crystal display device comprising: a driving cell and a compensating cell formed in a layered structure; a common heater interposed between said driving cell and said compensating cell for simultaneously heating both said driving cell and said compensating cell; and wherein said heater comprises a single electrically conductive thin film.
Claim 8
Dependent Claim
59 words
A layered type white and black super-twisted nematic liquid crystal display device comprising: a driving cell and a compensating cell formed in a layered structure; a common heater interposed between said driving cell and said compensating cell for simultaneously heating both said driving cell and said compensating cell; and wherein said heater comprises a single electrically conductive thin film.
Claim 9
Dependent Claim
30 words
The liquid crystal display device according to claim 6, wherein said single thin film is formed on an inner surface of said driving cell that faces an illuminating light source.
Claim 10
Dependent Claim
28 words
The liquid crystal display device according to claim 6, wherein said single thin film is formed on an inner surface of said compensating cell that faces an observer.
Claim 11
Dependent Claim
18 words
The liquid crystal display device according to claim 6, wherein said thin film comprises a vapor deposited film.
Claim 12
Dependent Claim
33 words
The liquid crystal display device according to claim 6, wherein said thin film heater comprises a material sputtered on a surface of at least one of said driving cell and said compensating cell.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |