Method for Applying Gamma Compensation To A Display And Gamma Compensation Device

• US 20140292792A1
• Filed: 01/28/2013
• Published: 10/02/2014
• Est. Priority Date: 01/23/2013
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chen, Lixuan, Kang, Chih-tsung
• Application Number:
  US13/818,812
• Publication Number:
  US 20140292792A1
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 5/10 Intensity circuits

Abstract

The present invention discloses a method for applying gamma compensation to a display and a gamma compensation device. The method comprises: respectively obtaining a brightness value when the display is displaying in a first environment, a brightness value of an ambient light reflected by a screen surface of the display in a second environment, wherein, the first environment is the environment that the display does not generate the ambient light reflected by the display; fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment; and adjusting a display brightness when the display is displaying according to the fitted gamma value. Through the above way, the present invention can increase the precise degree of the display in the environment having the ambient light, the sense of hierarchy and comfort.

Claims

1. A method for applying gamma compensation to a display, comprising:

dividing a display brightness of the display into M brightness levels, obtaining brightness values of the display being set in each brightness level in a first environment and a brightness value of an ambient light reflected by a screen surface of the display in a second environment, wherein, the first environment is the environment that the display does not generate the ambient light reflected by the display, and M is an integer that is greater than one;

fitting to obtain a fitted gamma value being closest to 2.2 according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment; and

adjusting display brightness when the display is displaying according to the fitted gamma value.

2. The method according to claim 1, wherein, in the step of fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment, comprises:

drawing a brightness curve of the display in the first environment according to the brightness values of each brightness level of the display in the first environment; and

fitting by using a generalized least squares method to obtain the fitted gamma value according to the brightness curve of the display in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment.

3. The method according to claim 1, wherein, in the step of adjusting display brightness when the display is displaying according to the fitted gamma value comprises:

replacing a gamma value used by the display currently with the fitted gamma value in order to adjust the display brightness when the display is displaying.

4. A method for applying gamma compensation to a display, comprising:

respectively obtaining a brightness value when the display is displaying in a first environment, a brightness value of an ambient light reflected by a screen surface of the display in a second environment, wherein, the first environment is the environment that the display does not generate the ambient light reflected by the display;

fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment; and

adjusting display brightness when the display is displaying according to the titled gamma value.

5. The method according to claim 4, wherein, in the step of fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment, comprises:

fitting to obtain the fitted gamma value being closest to 2.2 according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment.

6. The method according to claim 4, wherein, in the step of respectively obtaining a brightness value when the display is displaying in a first environment, a brightness value of an ambient light reflected by a screen surface of the display in a second environment, wherein, the first environment is the environment that the display does not generate reflective light from the ambient light, comprises:

dividing a display brightness of the display into M brightness levels, obtaining the brightness values of the display being set in each brightness level in the first environment, wherein M is an integer that is greater than one.

7. The method according to claim 6, wherein, in the step of fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment, comprises:

drawing a brightness curve of the display in the first environment according to the brightness values of each brightness level of the display in the first environment; and

fitting by using a generalized least squares method to obtain the fitted gamma value according to the brightness curve of the display in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment.

8. The method according to claim 4, wherein, in the step of adjusting a brightness of the display when it is displaying according to the fitted gamma value comprises:

replacing a gamma value used by the display currently with the fitted gamma value in order to adjust the display brightness when the display is displaying.

9. A gamma compensation device comprising:

an acquisition module for respectively obtaining a brightness value when a display is displaying in a first environment and a brightness value of an ambient light reflected by a screen surface of the display in a second environment, wherein, the first environment is the environment that the display does not generate the ambient light reflected by the display;

a fitting module for fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment; and

an adjusting module for adjusting display brightness when the display is displaying according to the fitted gamma value.

10. The device according to claim 9, wherein, the fitting module is specifically for fitting to obtain a fitted gamma value closest to 2.2 according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment.

11. The device according to claim 9, wherein, the acquisition module is specifically for dividing a display brightness of the display into M brightness levels, obtaining brightness values of the display being set in each brightness level in the first environment, wherein M is an integer that is greater than one.

12. The device according to claim 11, wherein, the fitting module comprises:

a drawing unit for drawing a brightness curve of the display in the first environment according to the brightness values of each brightness level in the first environment; and

a generalized least squares fitting unit for using a generalized least squares method to obtain a fitted gamma value according to the brightness curves of the display in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment.

13. The device according to claim 9, wherein, the adjusting module is specifically for replacing a gamma value used by the display currently with the fitted gamma value in order to adjust a display brightness when the display is displaying.