US4928095A
Expired / Lapsed
US
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Active matrix-addressed picture display device
Assignee: LG Display Co Ltd
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Filing: 1983-12-16
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Granted: 1990-05-22
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Expires: 2003-12-16
Abstract
Abstract An active matrix-addressed picture display device comprises a matrix of picture elements arranged in a row-by-column matrix, each picture element comprising a liquid crystal cell, a single capacitor for holding a signal voltage to be applied to the liquid crystal cell, and a single switching transistor for enabling a signal voltage to be applied to the capacitor. Column signal supply electrodes are connected to apply signal voltages to the columns of switching transistors, and row address electrodes are connected to apply scanning voltages to the rows of switching transistors. To eliminate shorting between the substrate and the column and row electrodes, one side of the capacitors in each row of picture elements are connected to a preceding row address electrode of a neighboring row of picture elements.
Inventors
- 👤 Yukito Kawahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136213; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3659; G02F1/136259; G02F1/136263; G09G2320/00; G09G2320/02; G09G2320/0209; G09G2320/0214
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
An active matrix-addressed picture display device comprising: m row address electrodes which are scanned in one direction during use of the device; n column signal supply electrodes; and a plurality of picture elements arranged in m rows and n columns, each picture element comprising a liquid cyrstal cell, a switching transistor having a gate electrode connected to one row address electrode, a source electrode connected to one column signal supply electrode and a drain electrode connected to the liquid crystal cell, and a single capacitor one side of which is connected to the drain electrode of said switching transistor and the other side of which is connected to a preceding row address electrode preceding the picture element of which the capacitor forms a part in the scanning direction.
Claim 2
Dependent Claim
128 words
An active matrix-addressed picture display device comprising: m row address electrodes which are scanned in one direction during use of the device; n column signal supply electrodes; and a plurality of picture elements arranged in m rows and n columns, each picture element comprising a liquid cyrstal cell, a switching transistor having a gate electrode connected to one row address electrode, a source electrode connected to one column signal supply electrode and a drain electrode connected to the liquid crystal cell, and a single capacitor one side of which is connected to the drain electrode of said switching transistor and the other side of which is connected to a preceding row address electrode preceding the picture element of which the capacitor forms a part in the scanning direction.
Claim 3
Dependent Claim
177 words
An active matrix-addressed picture display device comprising: a matrix of picture elements arranged in a row-by-column matrix, each picture element comprising a liquid crystal cell, a single capacitor for holding a signal voltage to be applied to the liquid crystal cell, the single capacitor having a pair of terminals, one terminal being connected to the liquid crystal cell, and a switching transistor for enabling a signal voltage to be applied to the capacitor, the switching transistor having a gate electrode, a first electrode, and a second electrode connected to said one terminal of the capacitor; column signal supply electrodes connected to apply signal voltages to the first electrodes of the columns of switching transistors; row address electrodes scanned in one direction and connected to apply scanning voltages to the gate electrodes of the rows of switching transistors; and means connecting the other terminals of the capacitors in each row of picture elements to a preceding row address electrode of a neighboring row of picture elements which precedes said each row of picture elements on the scanning direction.
Claim 4
Dependent Claim
177 words
An active matrix-addressed picture display device comprising: a matrix of picture elements arranged in a row-by-column matrix, each picture element comprising a liquid crystal cell, a single capacitor for holding a signal voltage to be applied to the liquid crystal cell, the single capacitor having a pair of terminals, one terminal being connected to the liquid crystal cell, and a switching transistor for enabling a signal voltage to be applied to the capacitor, the switching transistor having a gate electrode, a first electrode, and a second electrode connected to said one terminal of the capacitor; column signal supply electrodes connected to apply signal voltages to the first electrodes of the columns of switching transistors; row address electrodes scanned in one direction and connected to apply scanning voltages to the gate electrodes of the rows of switching transistors; and means connecting the other terminals of the capacitors in each row of picture elements to a preceding row address electrode of a neighboring row of picture elements which precedes said each row of picture elements on the scanning direction.
Claim 5
Dependent Claim
25 words
An active matrix-addressed picture display device according to claim 2; wherein the neighboring row of picture elements comprises an immediately preceding row of picture elements.
Claim 6
Dependent Claim
17 words
An active matrix-addressed picture display device according to claim 2 wherein the switching transistors comprise thin-film transistors.
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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |