Patent US3814501A successfully refreshed from Google Patents.
US3814501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-crystal display device and method of making
Assignee: RCA Corp
•
Filing: 1972-12-04
•
Granted: 1974-06-04
•
Expires: 1992-12-04
Abstract
Abstract Disposed on the inner surface of the rear substrate of the device are a plurality of rear electrodes, each made of a lightreflective electrically-conductive material, and a plurality of electrical leads extending therefrom. Directly opposite each rear electrode is an identically-shaped front electrode disposed on the inner surface of the front substrate and made of a transparent conductive material. The remainder of the inner surface of the front substrate is coated with a reflective conductive material. Preferably, the rear electrodes are formed by depositing aluminum or silver on positively-masked areas of the rear-substrate inner surface; and the front electrodes are formed by depositing a continuous coating of indium oxide or tin oxide on the front-substrate inner surface, and then depositing aluminum or silver on negatively-masked areas of the oxide coating.
Inventors
- 👤 H Schindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/1343; G02F1/134309; G02F1/134327
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A liquid-crystal display device comprising a front transparent substrate, a rear substrate, and a liquid-crystal material therebetween, a. said front substrate having an inner surface, at least one portion of which has a transparent conductive material thereon and the remainder of which has a reflective material thereon; and b. a reflective conductive material on the inner surface of said rear substrate having the same configuration as and being aligned with said one portion of said front-substrate inner surface.
Claim 2
Dependent Claim
78 words
A liquid-crystal display device comprising a front transparent substrate, a rear substrate, and a liquid-crystal material therebetween, a. said front substrate having an inner surface, at least one portion of which has a transparent conductive material thereon and the remainder of which has a reflective material thereon; and b. a reflective conductive material on the inner surface of said rear substrate having the same configuration as and being aligned with said one portion of said front-substrate inner surface.
Claim 3
Dependent Claim
20 words
The device of claim 1, comprising on said rear-substrate inner surface a conductive material extending from said reflective conductive material.
Claim 4
Dependent Claim
89 words
A liquid-crystal display device comprising a front transparent substrate, a rear substrate, and a liquidcrystal material therebetween, a. said front substrate having an inner surface, each of a plurality of discrete portions of which has a transparent conductive material thereon and the remainder of which has a reflective material thereon; and b. a plurality of reflective conductive material portions on the inner surface of said rear substrate each having the same configuration as and being aligned with a different one of said discrete portions of said front-substrate inner surface.
Claim 5
Dependent Claim
89 words
A liquid-crystal display device comprising a front transparent substrate, a rear substrate, and a liquidcrystal material therebetween, a. said front substrate having an inner surface, each of a plurality of discrete portions of which has a transparent conductive material thereon and the remainder of which has a reflective material thereon; and b. a plurality of reflective conductive material portions on the inner surface of said rear substrate each having the same configuration as and being aligned with a different one of said discrete portions of said front-substrate inner surface.
Claim 6
Dependent Claim
29 words
The device of claim 3, wherein each of at least two of said reflective conductive material portions on said rear-substrate inner surface haS the shape of a character segment.
Claim 7
Dependent Claim
30 words
The device of claim 4, wherein at least two conductive leads, each in contact with a different one of said character-segment-shaped portions, are also disposed on said rear-substrate inner surface.
References Cited (Backward Citations)
US3712047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |