US3932024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical devices
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1973-08-16
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Granted: 1976-01-13
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Expires: 1993-08-16
Abstract
Abstract In a liquid crystal display device comprising a pair of opposed electrode-mounted plates and a nematic liquid crystal layer, the electrode terminals are mounted on one plate by transferring the connection of one electrode to the opposite plate without directly contacting the liquid crystal material by interposing an electrically conductive material between the corresponding electrode terminal and the one electrode. In accordance with changes of environment, distinct patterns are obtained by making the front electrode of the liquid crystal display element transparent and the back electrode thereof a partial light-transmissive, mirror-like plane. The life of the liquid crystal element under application of D.C. field is increased by using titanium, zirconium and palladium as an essential component of the negative electrode of said element.
Inventors
- 👤 Masachika Yaguchi
- 👤 Shigetaro Furuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:16
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/1335; G02F1/133553; G02F1/1336; G02F2203/00; G02F2203/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
An optical display device comprising first and second transparent transposed plates, first and second electrodes mounted on the facing surfaces of said first and second plates, respectively, an insulating spacer interposed between said plates, a nematic liquid crystal filled between said first and second plates and within said insulating spacer, said first electrode being transparent and said second electrode being partially reflective having a light transmittance in the range of 30% to 70%, said second electrode being composed of an opaque reflective material with a plurality of fine holes formed therein, the number of holes being determined by the light transmittance desired, said optical display device being adapted to be energized by a D.C. source and wherein said first and second electrodes are a positive electrode and a negative electrode, respectively, said negative electrode comprising as an essential component titanium.
Claim 2
Dependent Claim
140 words
An optical display device comprising first and second transparent transposed plates, first and second electrodes mounted on the facing surfaces of said first and second plates, respectively, an insulating spacer interposed between said plates, a nematic liquid crystal filled between said first and second plates and within said insulating spacer, said first electrode being transparent and said second electrode being partially reflective having a light transmittance in the range of 30% to 70%, said second electrode being composed of an opaque reflective material with a plurality of fine holes formed therein, the number of holes being determined by the light transmittance desired, said optical display device being adapted to be energized by a D.C. source and wherein said first and second electrodes are a positive electrode and a negative electrode, respectively, said negative electrode comprising as an essential component titanium.
Claim 3
Dependent Claim
139 words
An optical display device comprising first and second transparent transposed plates, first and second electrodes mounted on the facing surfaces of said first and second plates, respectively, an insulating spacer interposed between said plates, a nematic liquid crystal filled between said first and second plates and within said insulating spacer, said first electrode being transparent and said second electrode being partially reflective having a light transmittance in the range of 30% to 70%, said second electrode being composed of an opaque reflective material with a plurality of fine holes formed therein, the number of holes being determined by the light transmittance desired, said optical display device being adapted to be energized by a D.C. source and said first and second electrodes are a positive electrode and a negative electrode, respectively, said negative electrode comprising as an essential component zirconium.
Claim 4
Dependent Claim
139 words
An optical display device comprising first and second transparent transposed plates, first and second electrodes mounted on the facing surfaces of said first and second plates, respectively, an insulating spacer interposed between said plates, a nematic liquid crystal filled between said first and second plates and within said insulating spacer, said first electrode being transparent and said second electrode being partially reflective having a light transmittance in the range of 30% to 70%, said second electrode being composed of an opaque reflective material with a plurality of fine holes formed therein, the number of holes being determined by the light transmittance desired, said optical display device being adapted to be energized by a D.C. source and said first and second electrodes are a positive electrode and a negative electrode, respectively, said negative electrode comprising as an essential component zirconium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |