US4741604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode arrays for cellular displays
Assignee: Individual
•
Filing: 1985-02-01
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Granted: 1988-05-03
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Expires: 2005-02-01
Abstract
Abstract An electric flat panel display has a matrix of flat panel display cells and a fault tolerant driver circuit and an electrode array. A folded field drive scheme applies a periodic voltage signal to a common electrode. Opposing electrodes are set to one of two voltage states by voltage setting circuits.
Inventors
- 👤 Cary D. Kornfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G02F1/1675; G02F1/1679
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A method for driving electrophoretic cellular display device comprising, applying a periodic voltage signal to a common electrode of an electrophoretic cellular display device, said periodic voltage signal having a low voltage and a high voltage, and setting each cell electrode of said display device to one of two cell state non-periodic DC voltages, one of said voltages being near the low voltage of said periodic voltage signal, the other of said voltages being near the high voltage of said periodic voltage signal.
Claim 2
Independent Claim
83 words
A method for driving electrophoretic cellular display device comprising, applying a periodic voltage signal to a common electrode of an electrophoretic cellular display device, said periodic voltage signal having a low voltage and a high voltage, and setting each cell electrode of said display device to one of two cell state non-periodic DC voltages, one of said voltages being near the low voltage of said periodic voltage signal, the other of said voltages being near the high voltage of said periodic voltage signal.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said low voltage is zero volts.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said high voltage is at least fifteen volts.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said periodic voltage signal is a square wave.
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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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |