# US 8,570,268 B2 · Driving method of liquid crystal display

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- Number: US 8,570,268 B2
- Document ID: US8570268B2
- Status: Granted
- Kind: B2
- Application number: 12/720,643
- Filed: 2010-03-09
- Published: 2011-03-10
- Granted: 2013-10-29
- Earliest claimed: 2009-09-08
- Assignees: Chimei Innolux Corporation
- Applicants: Yi-Zhong Sheu; Jui-Feng Ko
- Inventors: Yi-Zhong Sheu; Jui-Feng Ko
- Web page: https://patentgrep.com/patent/US8570268B2

## CPC

- G09G 3/3611: {Control of matrices with row and column drivers}
- G09G 3/3696: {Generation of voltages supplied to electrode drivers}
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A liquid crystal display comprising a display region, a control unit, a plurality of source drivers located along a first direction, and a plurality of gate drivers located along a second direction orthogonal to the first direction. A driving method of the liquid crystal display comprises dividing the display region into a plurality of screen regions with each screen region is in correspondence with one source driver or one gate driver; according to the display characteristics of the screen regions. The control unit generates a plurality of regulated signals for changing the output voltage value of the corresponding driver or changing the operating time of the corresponding driver. The regulated signal are sent to the corresponding driver.

## Claims

### Claim 1

A driving method of a liquid crystal display, the liquid crystal display comprising a display region, a control unit, a plurality of source drivers located along a first direction and outputting data signals, and a plurality of gate drivers located along a second direction orthogonal to the first direction, the driving method comprising:
dividing the display region into a plurality of screen regions along the second direction, each screen region being in correspondence with one gate driver; and
according to display characteristics of the screen regions, the control unit generating a plurality of regulated signals for the gate drivers;
wherein, the regulated signals are in one-to-one correspondence with the gate drivers and the gate drivers output scan signals according to the corresponding regulated signals, and the regulated signals separately adjust the operating time of the corresponding gate driver, such that offset between the data signals and the scan signals is reduced.

### Claim 2 (depends on 1)

The driving method as claimed in claim 1, wherein the displacement of the cycle of the regulated signal increases the farther away from the source drivers along the second direction.

### Claim 3 (depends on 2)

The driving method as claimed in claim 2, wherein the control unit includes a memory, a complex programmable logic device, and a timing controller, both the memory and the timing controller are electronically connected to the complex programmable logic device, and the memory stores the display characteristics of the LCD.

### Claim 4 (depends on 3)

The driving method as claimed in claim 3, wherein the complex programmable logic device outputs a plurality of regulated signals which have different cycle shifts according to the display characteristics of the memory.