US3865469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Panasonic Holdings Corp
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Filing: 1974-01-03
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Granted: 1975-02-11
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Expires: 1994-01-03
Abstract
Abstract The present invention relates to a liquid crystal display device with dichromatic display ability wherein liquid crystal is interposed in a spacing between a pair of spaced glass substrates, an inner surface of one of the glass substrates being formed with a transparent thin film electrode while an inner surface of the other glass substrate being formed with dyed metal oxide thin film layer such as dyed aluminum oxide. A transparent thin film electrode is disposed on the dyed metal oxide thin film layer and a voltage is applied across the electrode for effecting dichromatic displaying.
Inventors
- 👤 Komei Asai
- 👤 Masakazu Fukai
- 👤 Akio Moriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/13725; C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/22; C09K19/52; C09K19/60; G02F1/133; G02F1/1333; G02F1/133345
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
A liquid crystal display device comprising; a pair of spaced glass substrates, liquid crystal including pleochromatic dye interposed between said glass substrates, a transparent thin film electrode disposed on an inner surface of one of said glass substrates, a dyed metal oxide thin film layer disposeD on an inner surface of the other of said glass substrate, a transparent thin film electrode disposed on said metal oxide thin film layer, and means for externally applying voltage across said transparent thin film electrodes.
Claim 2
Dependent Claim
82 words
A liquid crystal display device comprising; a pair of spaced glass substrates, liquid crystal including pleochromatic dye interposed between said glass substrates, a transparent thin film electrode disposed on an inner surface of one of said glass substrates, a dyed metal oxide thin film layer disposeD on an inner surface of the other of said glass substrate, a transparent thin film electrode disposed on said metal oxide thin film layer, and means for externally applying voltage across said transparent thin film electrodes.
Claim 3
Dependent Claim
23 words
A liquid crystal display device as defined in claim 1 wherein; said metal oxide thin film layer is a dyed aluminum oxide layer.
Claim 4
Dependent Claim
44 words
A liquid crystal display device wherein the dyed aluminum oxide layer of claim 2 is formed by vapor depositing aluminum on the glass substrate and anodically oxidizing it to form porous aluminum oxide thin film, impregnating dye thereinto and sealing it in boiling water.
Claim 5
Dependent Claim
37 words
A liquid crystal display device wherein on the metal oxide thin film layer of the claim 1 there is formed a transparent electrically insulative thin film for protecting the dye in the metal oxide thin film layer.
References Cited (Backward Citations)
US3551026A
Cited
US3703329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |