US3753609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display
Assignee: Olivetti SpA
•
Filing: 1971-12-08
•
Granted: 1973-08-21
•
Expires: 1991-12-08
Abstract
Abstract A liquid crystal display in which a layer of liquid crystal material is confined between a pair of substrates in which two sets of parallelly disposed electrodes are disposed on one of the substrates at an angle with one another with a layer of dielectric material between the sets. Excitation voltage is applied between selected adjacent pairs of electrodes from each of the sets for energizing a selected portion of the liquid crystal material. A biasing electrode may be disposed on the other of said substrates for decreasing the field necessary to cause excitation of the liquid crystal material.
Inventors
- 👤 M Leibowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; G02F1/1343; G02F1/134309; G02F1/134336; G02F1/1339; G02F1/13392
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A liquid crystal display having a layer of liquid crystal material confined between a pair of substrates comprising: a first plurality of parallelly disposed electrodes on one of said substrates; dielectric material covering said first plurality of electrodes; a second plurality of parallelly disposed electrodes deposited on said one substrate over said dielectric material at an angle with said first plurality of electrodes; means for applying an excitation voltage between a selected pair of adjacent electrodes of said first plurality and a selected pair of adjacent electrodes of said second plurality to create a fringing field which excites the liquid crystal material in the region defined by the intersection of the two excited pairs of electrodes; a bias electrode deposited on the other of said substrates; and means for applying a biasing voltage between said bias electrode and the electrodes of one of said plurality of parallelly disposed electrodes for reducing the magnitude of the required excitation voltage.
Claim 2
Dependent Claim
158 words
A liquid crystal display having a layer of liquid crystal material confined between a pair of substrates comprising: a first plurality of parallelly disposed electrodes on one of said substrates; dielectric material covering said first plurality of electrodes; a second plurality of parallelly disposed electrodes deposited on said one substrate over said dielectric material at an angle with said first plurality of electrodes; means for applying an excitation voltage between a selected pair of adjacent electrodes of said first plurality and a selected pair of adjacent electrodes of said second plurality to create a fringing field which excites the liquid crystal material in the region defined by the intersection of the two excited pairs of electrodes; a bias electrode deposited on the other of said substrates; and means for applying a biasing voltage between said bias electrode and the electrodes of one of said plurality of parallelly disposed electrodes for reducing the magnitude of the required excitation voltage.
Claim 3
Dependent Claim
34 words
The liquid crystal display of claim 1 wherein said second plurality of parallelly disposed electrodes is deposited on a substrate at right angles to the electrodes of said first plurality of parallelly disposed electrodes.
Claim 4
Dependent Claim
28 words
The liquid crystal display of claim 1 wherein said bias voltage is applied between said bias electrode and the electrodes of said first plurality of parallelly disposed electrodes.
Claim 5
Dependent Claim
35 words
The liquid crystal display of claim 1 wherein said means for applying an excitation voltage includes row and column driving circuits and a source of driving voltage connected between said row and column driving circuits.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |