Method and apparatus for adjusting gray-scale chromatic aberration for display panel and display device

• US 10,460,681 B2
• Filed: 07/20/2017
• Issued: 10/29/2019
• Est. Priority Date: 08/01/2016
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: An, Na
• Primary Examiner(s): Rabindranath, Roy P
• Application Number:
  US15/654,995
• Publication Number:
  US 20180033380A1
• Time in Patent Office: 831 Days
• CPC Class Codes: G06T 2207/30121 CRT, LCD or plasma display
• CPC Class Codes: G06T 7/001 using an image reference approach
• CPC Class Codes: G06T 7/11 Region-based segmentation
• CPC Class Codes: G06T 7/90 Determination of colour characteristics
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 3/006 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 Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

The embodiments of the present disclosure provide a method and apparatus for adjusting gray-scale chromatic aberration for a display panel, as well as a display device. The method comprises: inputting a data signal of a test picture to sub-pixels of the display panel, for causing the display panel to display the test picture; collecting optical parameters of respective regions in the test picture; comparing the optical parameter of each region in the test picture with an optical parameter of a standard picture; and adjusting the data signal inputted to the sub-pixels, such that a difference between the optical parameter of each region in the test picture and the optical parameter of the standard picture falls within a predetermined range. The optical parameter comprises a color coordinate and its corresponding brightness.

Claims

1. A method for adjusting gray-scale chromatic aberration for a display panel, comprising:

inputting a data signal of a test picture to sub-pixels of the display panel, for causing the display panel to display the test picture;

collecting optical parameters of respective regions in the test picture;

comparing the optical parameter of each region in the test picture with an optical parameter of a standard picture; and

adjusting the data signal inputted to the sub-pixels such that a difference between the optical parameter of each region in the test picture and the optical parameter of the standard picture falls within a predetermined range,

wherein the optical parameter comprises a color coordinate and its corresponding brightness;

wherein the method further comprises adjusting a gray-scale color coordinate of the test picture in response to a difference between the color coordinate of each region in the test picture and the color coordinate of the standard picture has an absolute value smaller than a first predetermined threshold.

2. The adjusting method according to claim 1, wherein the display panel comprises n*n regions, where n is an integer larger than 1.

3. The adjusting method according to of claim 2, wherein the test picture is a white picture and the standard picture is a white balance picture, and said adjusting the data signal inputted to the sub-pixels such that the difference between the optical parameter of each region in the test picture and the optical parameter of the standard picture falls within the predetermined range comprises:

comparing the color coordinates of the respective regions in the test picture with the color coordinates of the standard picture sequentially;

adjusting, when a difference between the color coordinate of any region in the test picture and the color coordinate of the standard picture has an absolute value larger than 0, the data signal inputted to the sub-pixels of the region, such that a difference between the color coordinate of the region and the color coordinate of the standard picture is smaller than a first predetermined threshold and the brightness corresponding to the color coordinate of the region is higher than a predetermined brightness; and

terminating the adjustment when a difference between the color coordinate of at least one region in the test picture and the color coordinate of the standard picture has an absolute value larger than the first predetermined threshold.

4. The adjusting method according to claim 3, wherein said adjusting the data signal inputted to the sub-pixels of the region comprises:

when X-X′

>

0 and Y-Y′

>

0;

adjusting the data signal inputted to red sub-pixels to decrease a display proportion of the red sub-pixels in the region, such that X-X′

for the region is smaller than a second predetermined threshold; and

adjusting the data signal inputted to green sub-pixels to decrease a display proportion of the green sub-pixels in the region, such that Y-Y′

for the region is smaller than the second predetermined threshold,

when X-X′

<

0 and Y-Y′

<

0;

adjusting the data signal inputted to blue sub-pixels to decrease a display proportion of the blue sub-pixels in the region, such that X-X′

for the region is smaller than the second predetermined threshold; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that Y-Y′

for the region is smaller than the second predetermined threshold,

when X-X′

>

0 and Y-Y′

<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that Y-Y′

for the region is smaller than a third predetermined threshold;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region, such that X-X′

for the region is smaller than a second predetermined threshold; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region, such that X-X′

for the region is smaller than the second predetermined threshold,

when X-X′

<

0 and Y-Y′

>

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that X-X′

for the region is smaller than the third predetermined threshold;

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that Y-Y′

for the region is smaller than a second predetermined threshold; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region, such that X-X′

for the region is smaller than the second predetermined threshold,

wherein (X, Y) represents the color coordinate of the region in the test picture and (X′

, Y′

) represents the color coordinate of the standard picture.

5. The adjusting method according to claim 4, further comprising:

adjusting, when the difference between the color coordinate of each region in the test picture and the color coordinate of the standard picture has an absolute value smaller than the first predetermined threshold, a gray-scale color coordinate of the test picture.

6. The adjusting method according to claim 5, wherein said adjusting the gray-scale color coordinate of the test picture comprises:

displaying the test picture at different gray-scales in the respective regions in the display panel;

comparing the gray-scale color coordinates of the respective regions in the test picture with the color coordinates of the standard picture sequentially; and

adjusting, when a difference between the gray-scale color coordinate of any region in the test picture and the color coordinate of the standard picture has an absolute value larger than 0, the data signal inputted to the sub-pixels of the region, such that the variance between the gray-scale color coordinate of the region and the color coordinate of the standard picture is minimized and the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness.

7. The adjusting method according to claim 6, wherein said adjusting the data signal inputted to the sub-pixels of the region such that the variance between the gray-scale color coordinate of the region and the color coordinate of the standard picture is minimized and the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness comprises:

when M-X′

>

0 and N-Y′

>

0;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region, such that an abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that an ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

when M-X′

<

0 and N-Y′

<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that the abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that the ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

when M-X′

>

0 and N-Y′

<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that a difference between the ordinate of the gray-scale color coordinate of the region and the ordinate of the color coordinate of the standard picture is smaller than the third predetermined threshold and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region, such that the abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region, such that the ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

when M-X′

<

0 and N-Y′

>

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that a difference between the abscissa of the gray-scale color coordinate of the region and the abscissa of the color coordinate of the standard picture is smaller than the third predetermined threshold and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness;

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that the ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region, such that the abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

wherein (M, N) represents the gray-scale color coordinate of the region in the test picture and (X′

, Y′

) represents the color coordinate of the standard picture.

8. The adjusting method according to claim 1, wherein said adjusting the gray-scale color coordinate of the test picture comprises:

displaying the test picture at different gray-scales respectively in the respective regions in the display panel;

comparing the gray-scale color coordinates of the respective regions in the test picture with the color coordinates of the standard picture sequentially; and

adjusting, when a difference between the gray-scale color coordinate of any region in the test picture and the color coordinate of the standard picture has an absolute value larger than 0, the data signal inputted to the sub-pixels of the region, such that the variance between the gray-scale color coordinate of the region and the color coordinate of the standard picture is minimized and the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness.

9. The adjusting method according to claim 8, wherein said adjusting the data signal inputted to the sub-pixels of the region such that the variance between the gray-scale color coordinate of the region and the color coordinate of the standard picture is minimized and the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness comprises:

when M-X′

>

0 and N-Y′

>

0;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region, such that an abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that an ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

when M-X′

<

0 and N-Y′

<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that the abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that the ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

when M-X′

>

0 and N-Y′

<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that a difference between the ordinate of the gray-scale color coordinate of the region and the ordinate of the color coordinate of the standard picture is smaller than the third predetermined threshold and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region, such that the abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region, such that the ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

when M-X′

<

0 and N-Y′

>

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region, such that a difference between the abscissa of the gray-scale color coordinate of the region and the abscissa of the color coordinate of the standard picture is smaller than the third predetermined threshold and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness;

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region, such that the ordinate, N, of the gray-scale color coordinate of the region results in a minimum value of (N-Y′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region, such that the abscissa, M, of the gray-scale color coordinate of the region results in a minimum value of (M-X′

)² and that the brightness corresponding to the gray-scale color coordinate of the region is higher than the predetermined brightness,

wherein (M, N) represents the gray-scale color coordinate of the region in the test picture and (X′

, Y′

) represents the color coordinate of the standard picture.

10. The adjusting method according to claim 8, wherein said adjusting the gray-scale color coordinates of the respective regions in the test picture further comprises:

displaying the test picture at continuous gray-scales respectively in the respective regions in the display panel;

comparing the gray-scale color coordinate of one of the regions in the test picture with predetermined adjacent, continuous color coordinates sequentially;

determining a gray-scale to be adjusted, the gray-scale to be adjusted having a maximum absolute difference from the gray-scale color coordinate of the region among the predetermined adjacent, continuous color coordinates; and

adjusting, when a difference between the color coordinate of the gray-scale to be adjusted and the gray-scale color coordinate of the region has an absolute value larger than 0, the data signal inputted to the sub-pixels of the region in the test picture in which the gray-scale to be adjusted is displayed, such that the variance between the color coordinate of the gray-scale to be adjusted and the gray-scale color coordinate of the region is minimized and the brightness corresponding to the region in the test picture in which the gray-scale to be adjusted is displayed is higher than the predetermined brightness.

11. The adjusting method according to claim 10, wherein said adjusting the data signal inputted to the sub-pixels of the region in the test picture in which the gray-scale to be adjusted is displayed, such that the variance between the color coordinate of the gray-scale to be adjusted and the gray-scale color coordinate of the region is minimized and the brightness corresponding to the region in the test picture in which the gray-scale to be adjusted is displayed is higher than the predetermined brightness comprises:

when M′

-M>

0 and N′

-N>

0;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that an abscissa, M′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (M′

-M)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the red sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that an ordinate, N′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (N′

-N)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness,

when M′

-M<

0 and N′

-N<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that the abscissa, M′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (M′

-M)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness; and

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the red sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that the ordinate, N′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (N′

-N)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness,

when M′

-M>

0 and N′

-N<

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that a difference between the ordinate of the color coordinate of the gray-scale to be adjusted and the ordinate of the color coordinate of the region is smaller than the third predetermined threshold and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness;

adjusting the data signal inputted to the red sub-pixels to decrease the display proportion of the red sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that the abscissa, M′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (M′

-M)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that the ordinate, N′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (N′

-N)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness,

when M′

-M<

0 and N′

-N>

0;

adjusting the data signal inputted to the blue sub-pixels to decrease the display proportion of the blue sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that a difference between the ordinate of the color coordinate of the gray-scale to be adjusted and the ordinate of the color coordinate of the region is smaller than the third predetermined threshold and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness;

adjusting the data signal inputted to the green sub-pixels to decrease the display proportion of the green sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that the abscissa, M′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (M′

-M)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness; and

adjusting the data signal inputted to the blue sub-pixels to increase the display proportion of the blue sub-pixels in the region in the test picture in which the gray-scale to be adjusted is displayed, such that the ordinate, N′

, of the color coordinate of the gray-scale to be adjusted results in a minimum value of (N′

-N)² and that the brightness corresponding to the color coordinate of the gray-scale to be adjusted is higher than the predetermined brightness,

wherein (M, N) represents the gray-scale color coordinate of the region in the test picture and (M′

, N′

) represents the gray-scale color coordinate of the gray-scale to be adjusted.

12. An apparatus for adjusting gray-scale chromatic aberration for a display panel, comprising:

a storage storing instructions;

a processor configured to execute the instructions to;

input a data signal of a test picture to sub-pixels of the display panel, for causing the display panel to display the test picture;

collect optical parameters of respective regions in the test picture;

compare the optical parameter of each region in the test picture with an optical parameter of a standard picture; and

adjust the data signal inputted to the sub-pixels, such that a difference between the optical parameter of each region in the test picture and the optical parameter of the standard picture falls within a predetermined range,

wherein the optical parameter comprises a color coordinate and its corresponding brightness;

wherein the processor is further configured to execute the instructions to adjust a gray-scale color coordinate of the test picture, in response to a difference between the color coordinate of each region in the test picture and the color coordinate of the standard picture has an absolute value smaller than a first predetermined threshold.

13. A display device, comprising the apparatus for adjusting gray-scale chromatic aberration for a display panel according to claim 12.