US5841415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for driving an LCD to compensate for RC delay
Assignee: MagnaChip Semiconductor Ltd
•
Filing: 1996-01-03
•
Granted: 1998-11-24
•
Expires: 2016-01-03
Abstract
Abstract In a method for driving LCD, common electrodes arranged between a glass substrate having transistors and a glass substrate having color filters are divided into a plurality of segmented electrodes, different compensating voltages are applied to corresponding segmented electrodes, and an error of a pixel voltage due to a RC delay of a gate line are compensated, so as to prevent degradation of a picture quality caused due to an RC delay of a gate line.
Inventors
- 👤 Oh-Kyong Kwon
- 👤 Kwang-Ho Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:40
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3655; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G09G2320/00; G09G2320/02; G09G2320/0223
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
A method for driving pixels in a display device comprising the steps of: arranging a plurality of common electrodes between a first substrate having transistors and a second substrate having filters; and applying different compensating voltages to respective ones of groups of common electrodes to compensate for variations in a respective pixel voltage due to a delay time of a gate line that is based on a distance of each of said groups to a gate driver.
Claim 2
Independent Claim
77 words
A method for driving pixels in a display device comprising the steps of: arranging a plurality of common electrodes between a first substrate having transistors and a second substrate having filters; and applying different compensating voltages to respective ones of groups of common electrodes to compensate for variations in a respective pixel voltage due to a delay time of a gate line that is based on a distance of each of said groups to a gate driver.
Claim 3
Dependent Claim
24 words
The method according to claim 1, wherein the plurality of common electrodes are arranged perpendicularly to the gate line connected to a gate driver.
Claim 4
Dependent Claim
28 words
The method according to claim 1, wherein the compensating voltage applied to the plurality of common electrodes differs respectively according to the delay time of the gate line.
Claim 5
Dependent Claim
15 words
The method according to claim 1, wherein the delay time is an RC delay time.
Claim 6
Dependent Claim
30 words
The method according to claim 1, wherein in said compensating voltage, different voltages are applied to each of the groups in accordance with the delay time of the gate line.
Claim 7
Dependent Claim
96 words
An LCD driving device, comprising: a plurality of transistors each connected with a corresponding gate line, wherein in said each of the transistors an error value of a video signal applied to LCD capacitors, respectively, is measured based on a difference between pulse signals applied to the transistors; and a more than two groups of electrodes, which are divided from common electrodes connected with a corresponding one of the LCD capacitors in accordance with the measured error value, and wherein different compensating voltages are applied to each of the more than two groups of electrodes, respectively.
Claim 8
Dependent Claim
96 words
An LCD driving device, comprising: a plurality of transistors each connected with a corresponding gate line, wherein in said each of the transistors an error value of a video signal applied to LCD capacitors, respectively, is measured based on a difference between pulse signals applied to the transistors; and a more than two groups of electrodes, which are divided from common electrodes connected with a corresponding one of the LCD capacitors in accordance with the measured error value, and wherein different compensating voltages are applied to each of the more than two groups of electrodes, respectively.
Claim 9
Dependent Claim
32 words
The device according to claim 6, wherein the more than two groups of electrodes, are grouped perpendicularly to the gate lines and are grouped irregularly in accordance with shapes of pixel arrays.
Claim 10
Dependent Claim
74 words
A display device, comprising: a first driver; a second driver; a plurality of pixels respectively coupled to the first and second drivers using control and first electrodes; and a plurality of common electrodes coupled to said pixels, wherein the common electrodes comprise more than two groups of common electrodes, and wherein each of the more than two groups of common electrodes receive a different compensating voltage based on a distance from the first driver.
Claim 11
Dependent Claim
74 words
A display device, comprising: a first driver; a second driver; a plurality of pixels respectively coupled to the first and second drivers using control and first electrodes; and a plurality of common electrodes coupled to said pixels, wherein the common electrodes comprise more than two groups of common electrodes, and wherein each of the more than two groups of common electrodes receive a different compensating voltage based on a distance from the first driver.
Claim 12
Dependent Claim
23 words
The device of claim 8, wherein the more than two groups of common electrodes are irregularly divided according to shapes of pixel arrays.
Claim 13
Dependent Claim
17 words
The device of claim 8, wherein the first and second drivers are gate and data drivers, respectively.
Claim 14
Dependent Claim
24 words
The device of claim 10, wherein the common electrodes extend in a first direction substantially perpendicular to gate lines coupled to the gate driver.
Claim 15
Dependent Claim
21 words
The device of claim 8, wherein the more than two groups of common electrodes each comprise sets of adjacent common electrodes.
Claim 16
Dependent Claim
29 words
The device of claim 8, wherein the common electrodes are coupled between a first substrate including a plurality of transistors and a second substrate including a plurality of filters.
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) | 2001-11-23 | 2002-05-25 | 2002-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-23 | 2006-05-25 | 2006-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-23 | 2010-05-25 | 2010-11-24 | $7700.00 | Window Closed / Lapsed |