Display apparatus and display method therefor

• US 10,950,158 B2
• Filed: 08/30/2019
• Issued: 03/16/2021
• Est. Priority Date: 09/20/2018
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectric Technology Co. Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: Hefei Xinsheng Optoelectric Technology Co. Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: Bao, Wenchao, Zou, Qinghua
• Primary Examiner(s): Rayan, Mihir K
• Application Number:
  US16/557,082
• Publication Number:
  US 20200098301A1
• Time in Patent Office: 564 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 2320/0295 by monitoring each display pixel
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]

Abstract

The present disclosure provides a display apparatus, including: a plurality of pixels, at least one of which includes a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel. Blue light emitted by the first blue sub-pixel has a wave band of 400˜540 nm and blue light emitted by the second blue sub-pixel has a wave band of 420˜580 nm. The red sub-pixel and the green sub-pixel are combined with the first blue sub-pixel or the second blue sub-pixel to perform a RGB three-primary-color display. The present disclosure further provides a display method for the display apparatus.

Claims

1. A display apparatus, comprising:

a plurality of pixels, at least one of which comprises a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel;

wherein

blue light emitted by the first blue sub-pixel has a wave band of 400˜

540 nm and blue light emitted by the second blue sub-pixel has a wave band of 420˜

580 nm, and

the red sub-pixel and the green sub-pixel are combined with the first blue sub-pixel or the second blue sub-pixel to perform a RGB three-primary-color display;

wherein the plurality of pixels are arranged in a plurality of rows and a plurality of columns; and

the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel in each of the plurality of pixels are arranged in one row;

or the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel in each of the plurality of pixels are arranged in two rows and two columns; and

wherein the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel in each of the plurality of pixels have a same size.

2. The display apparatus of claim 1, further comprising:

a chromaticity coordinate obtaining part configured to obtain chromaticity coordinates of the plurality of pixels based on data of an image to be displayed on the display apparatus;

a determination part configured to determine whether a chromaticity coordinate of any one of the plurality of pixels is in a first predefined color gamut;

wherein the first predefined color gamut is formed by connecting three respective points at chromaticity coordinates of red color, green color and second blue color of first three primary colors corresponding to the red sub-pixel, the green sub-pixel and the second blue sub-pixel with three straight lines; and

a controller configured to control the second blue sub-pixel in the pixel to display together with the red sub-pixel and the green sub-pixel if the chromaticity coordinate of the pixel is in the first predefined color gamut; and

to control the first blue sub-pixel in the pixel to display together with the red sub-pixel and the green sub-pixel if the chromaticity coordinate of the pixel is not in the first predefined color gamut.

3. The display apparatus of claim 2, further comprising:

a color gamut obtaining part configured to obtain the first predefined color gamut.

4. The display apparatus of claim 3, wherein the chromaticity coordinate of the red color of the first three primary colors is a chromaticity coordinate obtained by only lighting up the red sub-pixel in the pixel and turning off the green sub-pixel and the first and the second sub-pixels blue in the pixel;

the chromaticity coordinate of the green color of the first three primary colors is a chromaticity coordinate obtained by only lighting up the green sub-pixel in the pixel and turning off the red sub-pixel and the first and second blue sub-pixels; and

the chromaticity coordinate of the blue color of the first three primary colors is a chromaticity coordinate obtained by only lighting up the second blue sub-pixel in the pixel and turning off the red and green sub-pixels and the first blue sub-pixels.

5. The display apparatus of claim 4, wherein a second predefined color gamut is formed by connecting three respective points at chromaticity coordinates of red color, green color and second blue color of second three primary colors corresponding to the red sub-pixel, the green sub-pixel and the first blue sub-pixel with three straight lines;

and

the chromaticity coordinate of a first color of the second three primary colors is a chromaticity coordinate obtained by only lighting up the first blue sub-pixel in the pixel and turning off the red and green sub-pixels and the second blue sub-pixels.

6. The display apparatus of claim 5, wherein only a part of the first predefined color gamut overlaps the second predefined color gamut.

7. The display apparatus of claim 2, wherein a chromaticity coordinate obtaining part is further configured to analyze a color to be displayed by each pixel of the plurality of pixels based on the data of the image to be displayed on the display apparatus, thereby obtaining the chromaticity coordinate of the pixel.

8. The display apparatus of claim 1, wherein the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel are separately controlled.

9. The display apparatus of claim 1, wherein light of the second blue color has a wave peak in a range of 480˜

490 nm.

10. The display apparatus of claim 9, wherein the second blue color has a y value of greater than 0.08 in the chromaticity coordinate.

11. A display method for a display apparatus, the display apparatus comprising:

a plurality of pixels, at least one of which comprises a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel;

wherein

blue light emitted by the first blue sub-pixel has a wave band of 400˜

540 nm and blue light emitted by the second blue sub-pixel has a wave band of 420˜

580 nm,

wherein the display method comprises;

driving the first blue sub-pixel or the second blue sub-pixel to perform a RGB three-primary-color display together with the red sub-pixel and the green sub-pixel based on data of an image to be displayed on the display apparatus,

wherein the plurality of pixels are arranged in a plurality of rows and a plurality of columns;

the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel in each of the plurality of pixels are arranged in one row;

or the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel in each of the plurality of pixels are arranged in two rows and two columns; and

wherein the red sub-pixel, the green sub-pixel, the first blue sub-pixel and the second blue sub-pixel in each of the plurality of pixels have a same size.

12. The display method for the display apparatus of claim 11, wherein the driving the first blue sub-pixel or the second blue sub-pixel to perform a RGB three-primary-color display together with the red sub-pixel and the green sub-pixel based on the data of the image to be displayed on the display apparatus comprises:

obtaining chromaticity coordinates of the plurality of pixels based on the data of the image to be displayed on the display apparatus;

determining whether a chromaticity coordinate of any one of the plurality of pixels is in a first predefined color gamut;

wherein the first predefined color gamut is formed by connecting three respective points at chromaticity coordinates of red color, green color and second blue color of first three primary colors corresponding to the red sub-pixel, the green sub-pixel and the second blue sub-pixel with three straight lines; and

controlling the second blue sub-pixel in the pixel to perform the RGB three-primary-color display together with the red sub-pixel and the green sub-pixel in response to the chromaticity coordinate of the pixel in the first predefined color gamut; and

controlling the first blue sub-pixel in the pixel to perform the RGB three-primary-color display together with the red sub-pixel and the green sub-pixel in response to the chromaticity coordinate of the pixel not in the first predefined color gamut.

13. The display method for the display apparatus of claim 12, wherein before the obtaining chromaticity coordinates of the plurality of pixels, the display method further comprises:

obtaining the first predefined color gamut.

14. The display method for the display apparatus of claim 12, wherein the obtaining chromaticity coordinates of the plurality of pixels based on the data of the image to be displayed on the display apparatus comprises:

analyzing a color to be displayed by each pixel of the plurality of pixels based on the data of the image to be displayed on the display apparatus, thereby obtaining a chromaticity coordinate of the pixel.

15. The display method for the display apparatus of claim 11, wherein light of the second blue color has a wave peak in a range of 480˜

490 nm.

16. The display method for the display apparatus of claim 15, wherein the second blue color has a y value of greater than 0.08 in the chromaticity coordinate.

17. A display apparatus, comprising:

a plurality of pixels, at least one of which comprises a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel;

wherein

blue light emitted by the first blue sub-pixel has a wave band of 400˜

540 nm and blue light emitted by the second blue sub-pixel has a wave band of 420˜

580 nm, and

the red sub-pixel and the green sub-pixel are combined with the first blue sub-pixel or the second blue sub-pixel to perform a RGB three-primary-color display;

the display apparatus further comprises;

a chromaticity coordinate obtaining part configured to obtain chromaticity coordinates of the plurality of pixels based on data of an image to be displayed on the display apparatus;

a determination part configured to determine whether a chromaticity coordinate of any one of the plurality of pixels is in a first predefined color gamut;

wherein the first predefined color gamut is formed by connecting three respective points at chromaticity coordinates of red color, green color and second blue color of first three primary colors corresponding to the red sub-pixel, the green sub-pixel and the second blue sub-pixel with three straight lines; and

a controller configured to control the second blue sub-pixel in the pixel to display together with the red sub-pixel and the green sub-pixel if the chromaticity coordinate of the pixel is in the first predefined color gamut; and

to control the first blue sub-pixel in the pixel to display together with the red sub-pixel and the green sub-pixel if the chromaticity coordinate of the pixel is not in the first predefined color gamut;

the display apparatus further comprises;

a color gamut obtaining part configured to obtain the first predefined color gamut; and

wherein the chromaticity coordinate of the red color of the first three primary colors is a chromaticity coordinate obtained by only lighting up the red sub-pixel in the pixel and turning off the green sub-pixel and the first and the second sub-pixels blue in the pixel;

the chromaticity coordinate of the green color of the first three primary colors is a chromaticity coordinate obtained by only lighting up the green sub-pixel in the pixel and turning off the red sub-pixel and the first and second blue sub-pixels; and

the chromaticity coordinate of the blue color of the first three primary colors is a chromaticity coordinate obtained by only lighting up the second blue sub-pixel in the pixel and turning off the red and green sub-pixels and the first blue sub-pixels.

18. The display apparatus of claim 17, wherein a second predefined color gamut is formed by connecting three respective points at chromaticity coordinates of red color, green color and second blue color of second three primary colors corresponding to the red sub-pixel, the green sub-pixel and the first blue sub-pixel with three straight lines;

and

the chromaticity coordinate of a first color of the second three primary colors is a chromaticity coordinate obtained by only lighting up the first blue sub-pixel in the pixel and turning off the red and green sub-pixels and the second blue sub-pixels.

19. The display apparatus of claim 18, wherein only a part of the first predefined color gamut overlaps the second predefined color gamut.

20. The display apparatus of claim 17, wherein light of the second blue color has a wave peak in a range of 480˜

490 nm.