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

Patent metadata

Field	Value
Publication number	US-10460681-B2
Application number	US-201715654995-A
Country	US
Kind code	B2
Filing date	Jul 20, 2017
Priority date	Aug 1, 2016
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

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.

First claim

What is claimed is:

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 high

Assignees

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

Inventors

• An Na

Classifications

• G06T7/001

  using an image reference approach · CPC title

• G06T7/90

  Determination of colour characteristics · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• G09G3/3607 Primary

  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) · CPC title

• G06T7/11

  Region-based segmentation · CPC title