Method and apparatus for establishing luminance compensation model, method and apparatus for compensating for luminance of display screen, and display device

• US 10,395,587 B2
• Filed: 04/05/2017
• Issued: 08/27/2019
• Est. Priority Date: 06/17/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Wang, Yu
• Primary Examiner(s): Rosario, Nelson M
• Assistant Examiner(s): Au, Scott
• Application Number:
  US15/560,053
• Publication Number:
  US 20180182285A1
• Time in Patent Office: 874 Days
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0295 by monitoring each display pixel
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 2320/048 using evaluation of the usage time
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 5/10 Intensity circuits

Abstract

The present disclosure provides a method and an apparatus for establishing a luminance compensation model, a method and an apparatus for compensating for the luminance of a display screen, and a display device. The method for establishing a luminance compensation model for compensating for the luminance of a display screen includes acquiring an accumulated light emission amount of the display screen, if the accumulated light emission amount of the display screen falls within one of a plurality of predefined threshold intervals of light emission amount, determining a luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount, and establishing a luminance compensation model, which indicates a correlation between each of the plurality of threshold intervals of light emission amount and the corresponding luminance compensation coefficient.

Claims

1. A method for establishing a luminance compensation model for compensating for the luminance of a display screen, the method comprising:

acquiring an accumulated light emission amount of the display screen;

if the accumulated light emission amount of the display screen falls within one of a plurality of predefined threshold intervals of light emission amount, determining a luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount; and

establishing a luminance compensation model that indicates a correlation between each of the plurality of threshold intervals of light emission amount and the corresponding luminance compensation coefficient,

wherein determining the luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount comprises;

in the case that multiple accumulated light emission amounts fall within the one threshold interval of light emission amount,

i) determining the luminance compensation coefficient when one of the multiple accumulated light emission amounts falls within the one threshold interval of light emission amount, as the luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount;

or

ii) determining the luminance compensation coefficient when each of the multiple accumulated light emission amounts falls within the one threshold interval of light emission amount; and

calculating a weighted average of the determined luminance compensation coefficients as the luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount.

2. The method according to claim 1, wherein determining the luminance compensation coefficient comprises:

controlling the display screen to display an image according to a preset display parameter;

determining an actual luminance of the display screen for displaying the image; and

determining the luminance compensation coefficient according to the actual luminance and a theoretical luminance, wherein the theoretical luminance is a luminance at which the display screen should theoretically display under the preset display parameter.

3. The method according to claim 2, wherein acquiring the accumulated light emission amount of the display screen comprises:

calculating, for each frame image, a sum of display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval, to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.

4. The method according to claim 1, wherein acquiring the accumulated light emission amount of the display screen comprises:

calculating, for each frame image, a sum of display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval, to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.

5. A method for compensating for the luminance of a display screen, the method comprising:

acquiring an accumulated light emission amount of the display screen;

determining a threshold interval of light emission amount corresponding to the accumulated light emission amount of the display screen;

determining a luminance compensation coefficient corresponding to the determined threshold interval of light emission amount using the luminance compensation model established by the method according to claim 1; and

compensating for the luminance of the display screen based on the determined luminance compensation coefficient.

6. The method according to claim 5, further comprising:

determining whether the accumulated light emission amount of the display screen falls within another threshold interval of light emission amount, after compensating for the luminance of the display screen;

if the accumulated light emission amount of the display screen falls within the another threshold interval of light emission amount, determining the luminance compensation coefficient corresponding to the another threshold interval of light emission amount using the luminance compensation model, and compensating for the luminance of the display screen based on the determined luminance compensation coefficient; and

if the accumulated light emission amount of the display screen does not fall within the another threshold interval of light emission amount, maintaining the luminance compensation coefficient for the display screen.

7. The method according to claim 6, wherein acquiring the accumulated light emission amount of the display screen comprises:

acquiring, from driving data for displaying an image of the display screen, gray scales of all sub-pixels of the display screen in each frame image;

calculating, for each frame image, a sum of the display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.

8. The method according to claim 5, wherein acquiring the accumulated light emission amount of the display screen comprises:

acquiring, from driving data for displaying an image of the display screen, gray scales of all sub-pixels of the display screen in each frame image;

calculating, for each frame image, a sum of the display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.

9. An apparatus for compensating for the luminance of a display screen, the apparatus comprising:

at least one processor; and

at least one memory in which a computer program is stored;

wherein the computer program, when executed by the at least one processor, enables the apparatus to;

acquire an accumulated light emission amount of the display screen;

determine a threshold interval of light emission amount corresponding to the accumulated light emission amount of the display screen;

determine a luminance compensation coefficient corresponding to the determined threshold interval of light emission amount using the luminance compensation model established by the method according to claim 1; and

compensate for the luminance of the display screen based on the determined luminance compensation coefficient.

10. The apparatus according to claim 9, wherein the computer program, when executed by the at least one processor, enables the apparatus to:

further determine whether the accumulated light emission amount of the display screen falls within another threshold interval of light emission amount, after compensating for the luminance of the display screen;

if the accumulated light emission amount of the display screen falls within the another threshold interval of light emission amount, determine the luminance compensation coefficient corresponding to the another threshold interval of light emission amount using the luminance compensation model, and compensate for the luminance of the display screen based on the determined luminance compensation coefficient; and

if the accumulated light emission amount of the display screen does not fall within the another threshold interval of light emission amount, maintain the luminance compensation coefficient for the display screen.

11. The apparatus according to claim 10, wherein the computer program, when executed by the at least one processor, enables the apparatus to acquire the accumulated light emission amount of the display screen by:

acquiring, from driving data for displaying an image of the display screen, gray scales of all sub-pixels of the display screen in each frame image;

calculating, for each frame image, a sum of the display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.

12. The apparatus according to claim 9, wherein the computer program, when executed by the at least one processor, enables the apparatus to acquire the accumulated light emission amount of the display screen by:

acquiring, from driving data for displaying an image of the display screen, gray scales of all sub-pixels of the display screen in each frame image;

calculating, for each frame image, a sum of the display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.

13. An apparatus for establishing a luminance compensation model for compensating for the luminance of a display screen, the apparatus comprising:

at least one processor; and

at least one memory in which a computer program is stored, wherein when executed by the at least one processor, the computer program enables the apparatus to;

acquire an accumulated light emission amount of the display screen;

if the accumulated light emission amount of the display screen falls within one of a plurality of predefined threshold intervals of light emission amount, determine a luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount; and

establish a luminance compensation model that indicates a correlation between each of the plurality of threshold intervals of light emission amount and the corresponding luminance compensation coefficient,

wherein the computer program, when executed by the at least one processor, enables the apparatus to determine the luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount by;

in the case that multiple accumulated light emission amounts fall within the one threshold interval of light emission amount,

i) determining the luminance compensation coefficient when one of the multiple accumulated light emission amounts falls within the one threshold interval of light emission amount, as the luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount;

or

ii) determining the luminance compensation coefficient when each of the multiple accumulated light emission amounts falls within the one threshold interval of light emission amount; and

calculating a weighted average of the determined luminance compensation coefficients as the luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount.

14. The apparatus according to claim 13, wherein the computer program, when executed by the at least one processor, enables the apparatus to determine the luminance compensation coefficient by:

controlling the display screen to display an image according to a preset display parameter;

determining an actual luminance of the display screen for displaying the image; and

determining the luminance compensation coefficient according to the actual luminance and a theoretical luminance, wherein the theoretical luminance is a luminance at which the display screen should theoretically display under the preset display parameter.

15. The apparatus according to claim 13, wherein the computer program, when executed by the at least one processor, enables the apparatus to acquire the accumulated light emission amount of the display screen by:

calculating, for each frame image, a sum of display gray scales of all sub-pixels of the display screen; and

adding the sums of the display gray scales for the respective frame images at a predetermined time interval, to acquire an accumulated display gray scale as the accumulated light emission amount of the display screen.