Display panel, display method thereof, as well as display device

• US 9,761,168 B2
• Filed: 07/21/2015
• Issued: 09/12/2017
• Est. Priority Date: 04/20/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Wang, Kaixuan, Yuan, Hongliang, Li, Wei, Liu, Jiantao, Ma, Zhenfu, Wang, Yingzi
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): Shah, Sujit
• Application Number:
  US15/122,618
• Publication Number:
  US 20170069250A1
• Time in Patent Office: 784 Days
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/2074 using sub-pixels

Abstract

The disclosure relates to a display panel, a display method thereof and a display device. The method comprises: confirming a received image to be displayed as a preset pure-colored image; for each of the green subpixels, comparing the grayscale value that the green subpixel corresponds to with that of the red subpixel or the blue subpixel at a place corresponding to the green subpixel in a previous row to find out the difference; and adjusting the grayscale value of the green subpixel for displaying based on the difference. The grayscale value of the green subpixel is increased or decreased by a preset value according to whether the difference is greater than 0. Thereby the charging capacities of all the green subpixels are substantially the same, so as to avoid brightness difference and eliminate light and dark stripes appearing in the display panels.

Claims

1. A display method of a display panel comprising a plurality of red subpixels, green subpixels and blue subpixels that are arranged in a Rainbow manner, wherein the display method comprises the steps of:

confirming a received image to be displayed as a preset pure-coloured image, in which the grayscale values that the green subpixels correspond to are within a preset range whereas the grayscale values that the red subpixels and the blue subpixels correspond to are respectively located at different sides beyond the preset range;

for each of the green subpixels, comparing the grayscale value that the green subpixel corresponds to with that of the red subpixel or the blue subpixel at a place corresponding to the green subpixel in a previous row to find out the difference; and

adjusting the grayscale value of the green subpixel for displaying based on the difference, wherein the step of adjusting comprises subtracting a preset value from the grayscale value that the green subpixel corresponds to when the difference is less than 0;

or the step of adjusting comprises adding a preset value to the grayscale value that the green subpixel corresponds to when the difference is greater than 0.

2. The display method according to claim 1, wherein the preset value is positively correlated to the absolute value of the difference between the grayscale value that the red subpixels correspond to and the grayscale value that the blue subpixels correspond to.

3. The display method according to claim 2, wherein the preset value is greater than 0 and less than or equal to 2.

4. The display method according to claim 3, wherein when, in the image to be displayed, the grayscale value that the red subpixels correspond to is 0 or 255, the grayscale value that the blue subpixels correspond to is 255 or 0 and the grayscale value that the green subpixels correspond to is 127, the preset value is equal to 2.

5. The display method according to claim 1, wherein the preset range is from 100 to 150.

6. The display method according to claim 1, wherein, before confirming a received image to be displayed as a preset pure-coloured image, the display method further comprises the step of receiving grayscale information of a frame of the image to be displayed, and confirming whether the image to be displayed is a preset pure-coloured image according to the grayscale information.

7. The display method according to claim 6, wherein when it is confirmed that the received image to be displayed is not the preset pure-coloured image, the image is displayed according to the grayscale information of the received image to be displayed.

8. The display method according to claim 6, wherein when it is confirmed that the received image to be displayed is the preset pure-coloured image, the red subpixels and the blue subpixels are displayed respectively according to the grayscale value that the red subpixels correspond to and the grayscale value that the blue subpixels correspond to in the grayscale information of the received image to be displayed.

9. A display panel comprising a plurality of red, green and blue subpixels that are arranged in a Rainbow manner, the display panel further comprises a source driver connected with data lines of the display panel, wherein the source driver comprises:

a confirmation unit configured for confirming a received image to be displayed as a preset pure-coloured image, in which the grayscale values that the green subpixels correspond to are within a preset range whereas the grayscale values that the red subpixels and the blue subpixels correspond to are respectively located at different sides beyond the preset range;

a comparison unit configured for comparing the grayscale value that the green subpixel corresponds to with that of the red subpixel or the blue subpixel at a place corresponding to the green subpixel in a previous row to find out the difference; and

a display unit configured for adjusting the grayscale value of the green subpixel for displaying based on the difference, wherein the step of adjusting comprises subtracting a preset value from the grayscale value that the green subpixel corresponds to when the difference is less than 0;

or the step of adjusting comprises adding a preset value to the grayscale value that the green subpixel corresponds to when the difference is greater than 0.

10. The display panel according to claim 9, wherein the preset value is positively correlated to the absolute value of the difference between the grayscale value that the red subpixels correspond to and the grayscale value that the blue subpixels correspond to.

11. The display panel according to claim 10, wherein the preset value is greater than 0 and less than or equal to 2.

12. The display panel according to claim 11, wherein, when, in the image to be displayed, the grayscale value that the red subpixels correspond to is 0 or 255, the grayscale value that the blue subpixels correspond to is 255 or 0 and the grayscale value that the green subpixels correspond to is 127, the preset value is equal to 2.

13. The display panel according to claim 9, wherein the preset range is from 100 to 150.

14. The display panel according to claim 9, further comprising:

a receiving unit configured for receiving grayscale information of a frame of the image to be displayed before confirming a received image to be displayed as a preset pure-coloured image, and confirming whether the image to be displayed is the preset pure-coloured image according to the grayscale information.

15. A display device, comprising a display panel wherein the display panel comprises a plurality of red, green and blue subpixels that are arranged in a Rainbow manner,

wherein the display panel further comprises a source driver connected with data lines of the display panel, wherein the source driver comprises:

a confirmation unit configured for confirming a received image to be displayed as a preset pure-coloured image, in which the grayscale values that the green subpixels correspond to are within a preset range whereas the grayscale values that the red subpixels and the blue subpixels correspond to are respectively located at different sides beyond the preset range;

a comparison unit configured for comparing the grayscale value that the green subpixel corresponds to with that of the red subpixel or the blue subpixel at a place corresponding to the green subpixel in a previous row to find out the difference; and

a display unit configured for adjusting the grayscale value of the green subpixel for displaying based on the difference, wherein the step of adjusting comprises subtracting a preset value from the grayscale value that the green subpixel corresponds to when the difference is less than 0;

or the step of adjusting comprises adding a preset value to the grayscale value that the green subpixel corresponds to when the difference is greater than 0.