Patent US3647280A successfully refreshed from Google Patents.
US3647280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: RCA Corp
•
Filing: 1969-11-06
•
Granted: 1972-03-07
•
Expires: 1989-11-06
Abstract
Abstract Front and rear substrates sandwich a liquid crystal material therebetween. The substrates are transparent, and each substrate has a layer of a conductive material on the inside surface thereof. A thin opening or line divides the conductive material layers into segments, at least one of the segments of each layer defining an image, the images of the two layers being different. A layer of dielectric material covers one of the conductive layers and has an opening therethrough defining a third image. Terminal means are provided for applying either fluctuating or DC voltages to various ones of the conductive layer segments.
Inventors
- 👤 Richard Ira Klein
- 👤 Sandor Caplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:05
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; G02B; G02B27/00; G02B27/32; G02F1/1343; G02F1/134309; G09; G09F; G09F9/00; G09F9/30; G09F9/35
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A display device comprising: front and rear substrates, said front substrate being transparent, and a liquid crystal material disposed between said substrates; first and second electrical conductors on the inside surfaces of said front and rear substrates, respectively; said first conducTor being transparent; one of said conductors including a segment defining a first image; a dielectric material disposed between either of said conductors and said liquid crystal material and having an opening therethrough defining a second image; and terminal means for applying a fluctuating voltage between said segment and the other of said conductors, and for applying a DC voltage between said conductors.
Claim 2
Dependent Claim
103 words
A display device comprising: front and rear substrates, said front substrate being transparent, and a liquid crystal material disposed between said substrates; first and second electrical conductors on the inside surfaces of said front and rear substrates, respectively; said first conducTor being transparent; one of said conductors including a segment defining a first image; a dielectric material disposed between either of said conductors and said liquid crystal material and having an opening therethrough defining a second image; and terminal means for applying a fluctuating voltage between said segment and the other of said conductors, and for applying a DC voltage between said conductors.
Claim 3
Dependent Claim
59 words
A display device as in claim 1 wherein a projection of said first image onto the inside surface of the other of said substrates falls within the outline of the other of said conductors, and a projection of said second image onto each of said inside surfaces falls within the outline of each of said conductors on said surfaces.
Claim 4
Dependent Claim
38 words
A display device as in claim 2 wherein said other conductor includes a segment defining a third image, a projection of which on said inside surface of said front substrate falls within the outline of said one conductor.
Claim 5
Dependent Claim
28 words
A display device as in claim 2 wherein said one conductor comprises two electrically isolated segments, and said terminal means include separate connections to each of said segments.
Claim 6
Dependent Claim
38 words
A display device as in claim 4 wherein said other conductor includes a segment defining a third image, a projection of which on said inside surface of said front substrate falls within the outline of said one conductor.
Claim 7
Dependent Claim
28 words
A display device as in claim 5 wherein said other conductor comprises two electrically isolated segments, and said terminal means include separate connections to each of said segments.
Claim 8
Dependent Claim
121 words
A display device comprising: a pair of spaced-apart oppositely disposed substrates one of which is transparent; a film of liquid crystal material disposed between said substrates; a layer of conductive material on the inside surface of each of said substrates providing a fluctuating current path through said film from one of said substrates to the other of said substrates, said fluctuating current path defining a first image; a dielectric layer disposed on one of said conductive layers and having an opening therethrough providing a direct current path from one of said substrates to the other of said substrates, said direct current path defining a second image; and terminal means connected to each of said conductive layers for applying a voltage therebetween.
Claim 9
Dependent Claim
121 words
A display device comprising: a pair of spaced-apart oppositely disposed substrates one of which is transparent; a film of liquid crystal material disposed between said substrates; a layer of conductive material on the inside surface of each of said substrates providing a fluctuating current path through said film from one of said substrates to the other of said substrates, said fluctuating current path defining a first image; a dielectric layer disposed on one of said conductive layers and having an opening therethrough providing a direct current path from one of said substrates to the other of said substrates, said direct current path defining a second image; and terminal means connected to each of said conductive layers for applying a voltage therebetween.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |