# US 2010/0164940 A1 · Liquid crystal display and driving method thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2010/0164940 A1
- Document ID: US20100164940A1
- Status: Published application
- Kind: A1
- Application number: 12/556,680
- Filed: 2009-09-10
- Published: 2010-07-01
- Earliest claimed: 2008-12-26
- Assignees: LG Display Co., Ltd.
- Inventors: Suhyuk JANG; Yangseok Jeong; Songjae Lee
- Web page: https://patentgrep.com/patent/US20100164940A1

## CPC

- G09G 3/3614: {Control of polarity reversal in general}
- G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)}
- G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)}
- G09G 2320/0285: using tables for spatial correction of display data
- G09G 2320/08: Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
- 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 and a driving method thereof are provided. The liquid crystal display includes: a liquid crystal display panel including a plurality of data lines, a plurality of gate lines crossing the data lines, and pixels arranged in m×n matrix; a register for defining polarity pattern information, frame rotation information, and line rotation information to determine a polarity of a data voltage charged in N lines, wherein N is a positive integer less than n; a timing controller for generating a polarity control signal to control polarities of data voltages charged in n lines of the liquid crystal display panel based on the information read from the register; and source drive ICs for converting the polarities of the data voltages supplied to the data lines in response to the polarity control signal.

## Claims

### Claim 1

A liquid crystal display, comprising:
a liquid crystal display panel including a plurality of data lines, a plurality of gate lines crossing the data lines, and pixels arranged in m×n matrix, wherein m and n are positive integers;
a register for defining polarity pattern information, frame rotation information, and line rotation information to determine a polarity of a data voltage charged in N lines, wherein N is a positive integer less than n;
a timing controller for generating a polarity control signal to control polarities of data voltages charged in n lines of the liquid crystal display panel based on the informations read from the register; and
source drive ICs for converting the polarities of the data voltages supplied to the data lines in response to the polarity control signal.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, wherein the timing controller generates a polarity control signal of which logic is determined according to the polarity pattern information, repeats the logic of the polarity control signal in units of frame periods according to the frame rotation information, and repeats the logic of the polarity control signal in units of lines of the liquid crystal display panel according to the line rotation information.

### Claim 3 (depends on 2)

The liquid crystal display of claim 2, wherein the timing controller comprises:
a first counter for counting number of frames defined according to the frame rotation information;
a second counter for counting number of lines defined according to the line rotation information; and
a polarity control signal generating unit for detecting the frames and the lines by the first and second counters and generating the polarity control signal as a logical value of the polarity pattern synchronized with the frames and the lines, wherein the register stores the polarity pattern information, selects a logical value synchronized with the outputs of the first and second counters from the polarity pattern information, and repetitively outputs the logical value of the polarity pattern information.

### Claim 4 (depends on 1)

The liquid crystal display of claim 1, further comprising:
a system board for transmitting digital video data and timing signals to the timing controller through an interface circuit; and
an EEPROM connected to the timing controller for storing the polarity pattern information, the frame rotation information, and the line rotation information.

### Claim 5 (depends on 1)

The liquid crystal display of claim 1, further comprising an I2C controller for supplying the register with the polarity pattern information transmitted from any one of the system board and the EEPROM through I2C communication.

### Claim 6

A driving method of a liquid crystal display, which is for driving a liquid crystal display panel including a plurality of data lines, a plurality of gate lines crossing the data lines, and pixels arranged in m×n matrix, wherein m and n are positive integers, comprising:
defining polarity pattern information, frame rotation information, and line rotation information to determine a polarity of a data voltage charged in N lines, wherein N is a positive integer less than n;
generating a polarity control signal to control polarities of data voltages charged in n lines of the liquid crystal display panel based on the informations read from the register; and
converting the polarities of the data voltages supplied to the data lines in response to the polarity control signal.

### Claim 7 (depends on 6)

The method of claim 6, wherein the step of generating the polarity control signal comprises:
generating the polarity control signal of which logic is determined according to the polarity pattern information;
repeating the logic of the polarity control signal in units of frame periods according to the frame rotation information; and
repeating the logic of the polarity control signal in units of lines of the liquid crystal display panel according to the line rotation information.

### Claim 8 (depends on 7)

The method of claim 7, further comprising:
counting number of frames defined according to the frame rotation information; and
counting number of lines defined according to the line rotation information,
wherein in the generating of the polarity control signal, the frames and the lines are detected based on the count values and the polarity control signal is generated as a logical value of the polarity pattern synchronized with the frames and the lines.

### Claim 9 (depends on 6)

The method of claim 6, further comprising supplying the polarity pattern information through I2C communication.