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US3901584A
Expired / Lapsed
US
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Solid-state electro-optic display device
Assignee: Suwa Seikosha KK
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Filing: 1974-01-22
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Granted: 1975-08-26
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Expires: 1994-01-22
Abstract
Abstract A solid-state display device utilizes a transparent ferroelectric crystal having a plurality of transparent, conductive electrodes on each of opposed surfaces. Application of a voltage to said electrodes in a manner such as to establish and maintain electric fields which are essentially parallel to said opposed surfaces makes it possible to display one or a plurality of images in a single space. For said display, polarized light is directed at one of said surfaces.
Inventors
- 👤 Satoshi Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
A solid-state electro-optic display device For displaying optionally one or a pluarlity of images in a single region, comprising a transparent ferroelectric crystal having two essentially parallel surfaces, a first electrode structure on one of said parallel surfaces for generating at least one electric field parallel to and in a portion of said cyrstal proximate said one surface, a second electrode structure on the other of said surfaces for generating at least one electric field parallel to and in a portion of said crystal proximate said other surface, said first and second electrode structures being different from each other and each of said electrode structures being constructed and arranged for displaying different indicia, means for selectively applying voltages to said electrode structures and cooperating with same to generate said electric fields, and polarizer and analyzer plates at said parallel surfaces, whereby the intensity and the nature of light passing through said cyrstal may be varied.
Claim 2
Dependent Claim
155 words
A solid-state electro-optic display device For displaying optionally one or a pluarlity of images in a single region, comprising a transparent ferroelectric crystal having two essentially parallel surfaces, a first electrode structure on one of said parallel surfaces for generating at least one electric field parallel to and in a portion of said cyrstal proximate said one surface, a second electrode structure on the other of said surfaces for generating at least one electric field parallel to and in a portion of said crystal proximate said other surface, said first and second electrode structures being different from each other and each of said electrode structures being constructed and arranged for displaying different indicia, means for selectively applying voltages to said electrode structures and cooperating with same to generate said electric fields, and polarizer and analyzer plates at said parallel surfaces, whereby the intensity and the nature of light passing through said cyrstal may be varied.
Claim 3
Dependent Claim
39 words
The solid-state electroc-optic display device as defined in claim 1 wherein the thickness of said portions is sufficiently restricted that an indicium may be displayed by a field proximate on surface independently of a field proximate the other surface.
Claim 4
Dependent Claim
45 words
The solid-state electro-optic display device as defined in claim 1, wherein said portions on said parallel surfaces overlap and the thickness of said portions is sufficiently restricted that indicia on both of said surfaces may be shown in a single region of said crystal simultaneously.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |