Liquid crystal display device and method of driving the same

Patent metadata

Field	Value
Publication number	US-9953575-B2
Application number	US-201514956911-A
Country	US
Kind code	B2
Filing date	Dec 2, 2015
Priority date	Dec 30, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

Disclosed is a method of driving a display device that includes, for example, generating a gate control signal, a data control signal and an image data using an image signal; generating a data voltage using the data control signal and the image data; generating a gate voltage using the gate control signal; and sequentially applying the gate voltage of a high level to q groups of the plurality of gate lines during q frames, respectively, where q is an integer greater than 1.

First claim

What is claimed is:

1. A display device comprising: a timing controller that generates a gate control signal, a data control signal and an image data using an image signal; a data driver that is connected to the timing controller and generates a data voltage using the data control signal and the image data; a gate driver that is connected to the timing controller and generates a gate voltage using the gate control signal; and a display panel including a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixels and driven with a low frequency (f), the plurality of gate lines being connected to the gate driver and the plurality of data lines being connected to the data driver, and the low frequency (f) being less than 60 Hz for displaying an image using the data voltage, wherein the plurality of gate lines are divided into q groups, where q is an integer greater than 1, wherein the gate voltage of a high level is sequentially applied to the q groups of the plurality of gate lines during 1/f seconds, and wherein the gate voltage of the high level is applied to the q groups during q frames of sixty frames, respectively, and a plurality of other frames of the sixty frames where the gate voltage of a low level is applied are disposed between the q frames.

2. The device of claim 1 , wherein the display device is a liquid crystal display (LCD) device or an organic light emitting diode (OLED) display.

3. The device of claim 1 , wherein the gate voltage of the high level is sequentially applied to the q groups on a basis of 1/fq time interval.

4. The device of claim 3 , wherein the gate voltage of the high level is applied to each of the q groups for a frame corresponding to the high frequency during the 1/fq time interval.

5. The device of claim 4 , wherein the q frames are spaced apart from each other with an equal time interval in first to sixtieth frames.

6. The device of claim 5 , wherein the q groups includes first, second and third groups and the q frames includes first, twenty-first and forty-first frames,
wherein the first, second and third groups include (3p+1)th, (3p+2)th and (3p+3)th gate lines, respectively, where p is an integer equal to or greater than 0,
wherein the gate voltage of the high level is sequentially applied to the (3p+1)th gate lines during the first frame,
wherein the gate voltage of the high level is sequentially applied to the (3p+2)th gate lines during the twenty-first frame, and
wherein the gate voltage of the high level is sequentially applied to the (3p+3)th gate lines during the forty-first frame.

7. The device of claim 6 , wherein the data voltage having one of positive and negative polarities is applied to the pixel corresponding to the (3p+1)th gate lines during a first charging period of the first frame where the gate voltage of the high level is applied to the (3p+1)th gate lines, and a pixel voltage having one of the positive and negative polarities is maintained in the pixel corresponding to the (3p+1)th gate lines during a first holding period of the first to sixtieth frames,
wherein the data voltage having one of positive and negative polarities is applied to the pixel corresponding to the (3p+2)th gate lines during a second charging period of the twenty-first frame where the gate voltage of the high level is applied to the (3p+2)th gate lines, and the pixel voltage having one of the positive and negative polarities is maintained in the pixel corresponding to the (3p+2)th gate lines during a second holding period of the first to sixtieth frames, and
wherein the data voltage having one of positive and negative polarities is applied to the pixel corresponding to the (3p+3)th gate lines during a third charging period of the forty-first frame where the gate voltage of the high level is applied to the (3p+3)th gate lines, and the pixel voltage having one of the positive and negative polarities is maintained in the pixel corresponding to the (3p+3)th gate lines during a third holding period of the first to sixtieth frames.

8. A display device comprising: a timing controller that generates a gate control signal, a data control signal and an image data using an image signal; a data driver that is connected to the timing controller and generates a data voltage using the data control signal and the image data; a gate driver that is connected to the timing controller and generates a gate voltage using the gate control signal; and a display panel including a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixels and driven with a low frequency (f), the plurality of gate lines being connected to the gate driver and the plurality of data lines being connected to the data driver, and the low frequency (f) being less than 60 Hz for displaying an image using the data voltage, wherein the plurality of gate lines are divided into q groups, where q is an integer greater than 1, wherein the gate voltage of a high level is sequentially applied to the q groups of the plurality of gate lines during 1/f seconds, wherein the gate voltage of the high level is applied to the q groups for q frames of sixty frames, respectively, and wherein the q frames are adjacent to each other within ten frames in first to sixtieth frames.

9. The device of claim 8 , wherein the q groups includes first, second and third groups and the q frames includes first, (1+n)th and (1+2n)th frames, where n is an integer equal to or greater than 1 and equal to or smaller than 5,
wherein the first, second and third groups include (3p+1)th, (3p+2)th and (3p+3)th gate lines, respectively, where p is an integer equal to or greater than 0,
wherein the gate voltage of the high level is sequentially applied to the (3p+1)th gate lines during the first frame,
wherein the gate voltage of the high level is sequentially applied to the (3p+2)th gate lines during the (1+n)th frame, and
wherein the gate voltage of the high level is sequentially applied to the (3p+3)th gate lines during the (1+2n)th frame.

10. The device of claim 9 , wherein the data voltage having one of positive and negative polarities is applied to the pixel corresponding to the (3p+1)th gate lines during a first charging period of the first frame where the gate voltage of the high level is applied to the (3p+1)th gate lines, and a pixel voltage having one of the positive and negative polarities is maintained in the pixel corresponding to the (3p+1)th gate lines during a first holding period of the first to sixtieth frames,
wherein the data voltage having one of positive and negative polarities is applied to the pixel corresponding to the (3p+2)th gate lines during a second charging period of the (1+n)th frame where the gate voltage of the high level is applied to the (3p+2)th gate lines, and the pixel voltage having one of the positive and negative polarities is maintained in the pixel corresponding to the (3p+2)th gate lines during a second holding period of the first to sixtieth frames, and
wherein the data voltage having one of positive and negative polarities is applied to the pixel corresponding to the (3p+3)th gate lines during a third charging period of the (1+2n)th frame where the gate voltage of the high level is applied to the (3p+3)th gate lines, and the pixel voltage having one of the positive and negative polarities is maintained in the pixel corresponding to the (3p+3)th gate lines during a third holding period of the first to sixtieth frames.

11. A method of driving a display device having a display panel, wherein the display panel includes a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixels and is dri

Assignees

• Lg Display Co Ltd

Inventors

• Oh Dae-Seok
• Chung Moon-Soo

Classifications

• G09G3/3614 Primary

  Control of polarity reversal in general · CPC title

• G09G2340/0435

  Change or adaptation of the frame rate of the video stream · CPC title

• G09G2310/0243

  Details of the generation of driving signals · CPC title

• G09G2310/0213

  controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power · CPC title

• G09G3/3258 Primary

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title