Method and device for modulating image display quality of display device among different gray levels

Patent metadata

Field	Value
Publication number	US-9966039-B2
Application number	US-201414426030-A
Country	US
Kind code	B2
Filing date	Aug 1, 2014
Priority date	Jan 28, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

The present disclosure provides a method and a device for modulating image display quality of a display device. The method includes: debugging a display device to a modulation state, so that a common voltage of the display device corresponding to a predetermined gray level is a standard voltage; and modulating a common voltage of the display device corresponding to other controllable gray level into a preset value, wherein there is a first preset relationship between the preset value and the standard voltage.

First claim

What is claimed is:

1. A method for modulating image display quality, comprising the following steps:
setting a display device to a modulation state, which comprises:
aging the display device for a preset period of time;
modulating an image flicker of the display device into a predetermined value;
acquiring a first display parameter of the display device, and constructing a first gamma curve based on the first display parameter;
adjusting the first display parameter of the display device to a second display parameter until a gamma value of a second gamma curve of the display device corresponding to the second display parameter is within a predetermined range; and
setting a first common voltage to be a first value; and

modulating a second common voltage into a second value, wherein
the first common voltage is a common voltage of the display device corresponding to a predetermined gray level,
the second common voltage is a common voltage of the display device corresponding to a controllable gray level other than the predetermined gray level, and
the first value is equal to the second value,
wherein the first display parameter and the second display parameter are gamut or brightness, and
the step of modulating the second common voltage into the second value comprises:
acquiring the second common voltage; and
adjusting the second common voltage upward when the second common voltage is smaller than the second value, or adjusting the second common voltage downward when the second common voltage is greater than the second value.

2. The method according to claim 1 , wherein the predetermined value is a minimal value.

3. The method according to claim 1 , wherein the predetermined range is between 2.0 and 2.4.

4. The method according to claim 1 , wherein subsequent to the step of modulating the second common voltage into the second value, the method further comprises:
constructing a third gamma curve based on a third display parameter of the modulated display device; and
storing the third display parameter when a gamma value of the third gamma curve meets a preset requirement.

5. The method according to claim 1 , wherein the predetermined gray level is gray level 127.

6. The method according to claim 1 , wherein the controllable gray level comprises at least one of gray level 0, gray level 1, gray level 64, gray level 191, gray level 254 and gray level 255.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Su Wengang
• Yoon Daekeun
• Hu Weihao
• Liu Lei
• Yu Yangbing

Classifications

• G09G2320/0257

  Reduction of after-image effects · CPC title

• G09G2320/029

  by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel · CPC title

• G09G5/10 Primary

  Intensity circuits · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title