Patent US4537471A successfully refreshed from Google Patents.
US4537471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal pixel driver circuit and matrix display
Assignee: The AT&T MVPD Group LLC
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Filing: 1983-12-23
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Granted: 1985-08-27
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Expires: 2003-12-23
Abstract
Abstract The present invention provides a liquid crystal light valve pixel driver circuit comprising a pair of power electrodes, a pair of half-pixel electrodes, each half-pixel electrode being associated with a respective one of the power electrodes and a transistor switch for selectively conductively interconnecting the pair of half-pixel electrodes, the transistor switch being responsive to an applied data voltage potential. A strobe transistor and capacitor are further associated with the driver circuit to enable the demultiplexing of data from a data line and the transfer of a data representing voltage potential to the capacitor for application to the transistor switch.
Inventors
- 👤 Jan Grinberg
- 👤 Michael J. Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/1368; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3655; G02F1/136213; G02F2201/00; G02F2201/12; G02F2201/122; G09G2300/00; G09G2300/08; G09G2300/0809; G09G2300/0842; G09G2320/00; G09G2320/04; G09G2320/041; G09G3/2007; G09G3/2011
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A liquid crystal light valve pixel driver circuit comprising: (a) a pair of power electrodes having a voltage potential applied thereinbetween; (b) a pair of half-pixel electrodes, each of said half-pixel electrodes being associated with a respective one of said power electrodes; and (c) a first transistor switch selectably conductively interconnecting said half-pixel electrodes, said first transistor switch being responsive to an applied voltage data potential.
Claim 2
Dependent Claim
66 words
A liquid crystal light valve pixel driver circuit comprising: (a) a pair of power electrodes having a voltage potential applied thereinbetween; (b) a pair of half-pixel electrodes, each of said half-pixel electrodes being associated with a respective one of said power electrodes; and (c) a first transistor switch selectably conductively interconnecting said half-pixel electrodes, said first transistor switch being responsive to an applied voltage data potential.
Claim 3
Dependent Claim
21 words
The circuit of claim 1 wherein the voltage potential applied between said power electrodes is characterized as an AC voltage potential.
Claim 4
Dependent Claim
67 words
The circuit of claim 1 further comprising: (a) means for storing data, said means being operatively associated with said first transistor switch for controlling the function of said first transistor switch; (b) a data line; and (c) a second transistor switch selectably conductively interconnecting said data line with said data storage means for effecting the transfer of data from said data line to said data storage means.
Claim 5
Dependent Claim
13 words
The circuit of claim 3 wherein said data storage means is a capacitor.
Claim 6
Dependent Claim
94 words
A liquid crystal matrix display comprising: (a) a plurality of pairs of power electrodes; (b) a plurality of opposing pairs of half-pixel electrodes, each pair of half-pixel electrodes being associated with a given pair of said power electrodes such that each half-pixel electrode opposes a respective one of said power electrodes; and (c) a plurality of transistor switches, each said switch being operatively associated with a respective pair of said half-pixel electrodes so as to selectably conductively interconnect the half-pixel electrodes of said pair of half-pixel electrodes in response to a given data potential.
Claim 7
Dependent Claim
94 words
A liquid crystal matrix display comprising: (a) a plurality of pairs of power electrodes; (b) a plurality of opposing pairs of half-pixel electrodes, each pair of half-pixel electrodes being associated with a given pair of said power electrodes such that each half-pixel electrode opposes a respective one of said power electrodes; and (c) a plurality of transistor switches, each said switch being operatively associated with a respective pair of said half-pixel electrodes so as to selectably conductively interconnect the half-pixel electrodes of said pair of half-pixel electrodes in response to a given data potential.
Claim 8
Dependent Claim
31 words
The device of claim 5 wherein said transistor switches are FETs, the sources and drains thereof being conductively connected to the respective half-pixel electrodes of the corresponding pairs of half-pixel electrodes.
Claim 9
Dependent Claim
33 words
The device of claim 6 wherein a power voltage potential is applied between the power electrodes of each pair of power electrodes, the magnitude and polarity of said power voltage varying with time.
Claim 10
Dependent Claim
125 words
The device of claim 6 further comprising: (a) a plurality of data lines; (b) a plurality of strobe lines; (c) a plurality of strobe transistors; and (d) a plurality of data storage means, each said strobe transistor being operatively associated with a unique combination of one of said data lines and one of said strobe lines and further associated with respective ones of said data storage means and said transistor switches, such that said strobe transistors enable the transfer of data signals from said data lines to their corresponding data storage means in response to strobe signals selectively provided on said strobe lines, said data storage means being operatively associated with their corresponding transistor switches a data potential thereto representative of the respective data signals.
Claim 11
Dependent Claim
12 words
The device of claim 8 wherein said data storage means are capacitors.
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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |