Pixel structure, array substrate and display device

1. A pixel structure, comprising:

a plurality of pixel units arranged in an array form;

a plurality of scan lines; and

a plurality of data lines;

wherein the pixel unit includes:

a plurality of three-primary-color sub-pixel groups, wherein the three-primary-color sub-pixel group includes a first sub-pixel, a second sub-pixel and a third sub-pixel; and

a plurality of fourth sub-pixels, wherein one of the fourth sub-pixels is arranged between adjacent two of the three-primary-color sub-pixel groups, and the fourth sub-pixel has a color different from any of the first sub-pixel, the second sub-pixel and the third sub-pixel, each fourth sub-pixel is arranged between respective two adjacent three-primary-color sub-pixel groups, each fourth sub-pixel is shared by each the two adjoining three-primary-color sub-pixel groups, and a number of the fourth sub-pixels is one less than the number of the three-primary-color sub-pixel groups.

2. The pixel structure of claim 1 , wherein the plurality of fourth sub-pixels and the plurality of three-primary-color sub-pixel groups are alternately arranged in a row direction; or

the plurality of fourth sub-pixels and the plurality of three-primary-color sub-pixel groups are alternately arranged in a column direction.

3. The pixel structure of claim 1 , wherein the fourth sub-pixel is selected from a group consisting of white sub-pixel, yellow sub-pixel and cyan sub-pixel, and the first sub-pixel, the second sub-pixel and the third sub-pixel are selected from a group consisting of red sub-pixel, green sub-pixel, and blue sub-pixel.

4. The pixel structure of claim 3 , wherein the first sub-pixel, the second sub-pixel, and the third sub-pixel are the same in area.

5. The pixel structure of claim 3 , wherein the areas of the first sub-pixel, the second sub-pixel, and the third sub-pixel are not completely equal.

6. The pixel structure of claim 4 , wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are the same in area.

7. The pixel structure of claim 1 , wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are arranged in a column direction and connected to a same one of the data lines, and each of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel is connected to a corresponding one of the scan lines.

8. The pixel structure of claim 7 , wherein the first sub-pixel, each of the second sub-pixel, the third sub-pixel and the fourth sub-pixel is located at a same side of scan lines.

9. The pixel structure of claim 1 , wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are arranged in a row direction and connected to a same one of the scan lines, and each of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel is connected to a corresponding one of the data lines.

10. The pixel structure of claim 9 , wherein each of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel is located at a same side of the data lines.

11. The pixel structure of claim 1 , wherein the fourth sub-pixels and the three-primary-color sub-pixel groups are alternately arranged in a row direction, and the first sub-pixel, the second sub-pixel and the third sub-pixel of one said three-primary-color sub-pixel group are sequentially arranged in a column direction.

12. The pixel structure of claim 11 , wherein the first sub-pixel, the second sub-pixel and the third sub-pixel are connected to a same one of the data lines, the fourth sub-pixel is connected to an adjacent one of the data lines, each of the first sub-pixel, the second sub-pixel and the third sub-pixel is connected to a corresponding scan line, and the fourth sub-pixel is connected to any one of three said corresponding scan lines.

13. The pixel structure of claim 1 , wherein the fourth sub-pixels and the three-primary-color sub-pixel groups are alternately arranged in a column direction, and the first sub-pixel, the second sub-pixel and the third sub-pixel of one said three-primary-color sub-pixel group are sequentially arranged in a row direction.

14. An array substrate, comprising a base layer which has a display area and a non-display area around the display area, wherein a pixel structure is arranged in the display area, the pixel structure comprises a plurality of pixel units arranged in an array form, a plurality of scan lines and a plurality of data lines;

wherein the pixel unit includes:

four three-primary-color sub-pixel groups, wherein the three-primary-color sub-pixel group includes a first sub-pixel, a second sub-pixel and a third sub-pixel; and

three fourth sub-pixels, wherein each of the four sub-pixels is arranged between two adjacent three-primary-color sub-pixel groups, the fourth sub-pixel has a color different from any of the first sub-pixel, the second sub-pixel and the third sub-pixel, and the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are the same in area, each fourth sub-pixel is arranged between respective two adjacent three-primary-color sub-pixel groups, each fourth sub-pixel is shared by each the two adjoining three-primary-color sub-pixel groups, and a number of the fourth sub-pixels is one less than the number of the three-primary-color sub-pixel groups.

15. A display device, comprising an array substrate, wherein the array substrate comprises a base layer, the base layer has a display area and a non-display area around the display area, a pixel structure is arranged in the display area, and the pixel structure comprises a plurality of pixel units arranged in an array form, a plurality of scan lines and a plurality of data lines;

wherein the pixel unit includes:

a plurality of three-primary-color sub-pixel groups, wherein the three-primary-color sub-pixel group includes a first sub-pixel, a second sub-pixel and a third sub-pixel; and

a plurality of fourth sub-pixels, wherein one of the fourth sub-pixels is arranged between adjacent two of the plurality of three-primary-color sub-pixel groups, and the fourth sub-pixel has a color different from any of the first sub-pixel, the second sub-pixel and the third sub-pixel, each fourth sub-pixel is arranged between respective two adjacent three-primary-color sub-pixel groups, each fourth sub-pixel is shared by each the two adjoining three-primary-color sub-pixel groups, and a number of the fourth sub-pixels is one less than the number of the three-primary-color sub-pixel groups.

16. The display device of claim 15 , wherein the display device is a liquid crystal display device or an organic light emitting diode display device.

17. The pixel structure of claim 1 , wherein the first sub-pixel is arranged in one row, and the second sub-pixel and the third sub-pixel are arranged in another row, the first sub-pixel and the fourth sub-pixel are both connected to a same scan line, and the second sub-pixel and the fourth sub-pixel are both connected to a same adjacent scan line, the first sub-pixel and the second sub-pixel are both connected to a same data line, and the third sub-pixel is connected to an adjacent data line.

18. The pixel structure of claim 1 , wherein a share of the fourth sub-pixels is achieved by a comparator, each of two input terminals of the comparator is connected to a corresponding one of two data signals from a source driver, an output terminal of the comparator is connected to a data line connected to the fourth sub-pixel, and the output terminal of the comparator outputs the larger of the two input data signals.

19. The pixel structure of claim 1 , wherein in each pixel unit, a number of the fourth sub-pixels is three, and a number of a first sub-pixel is four, a number of a second sub-pixel is four, a number of a third sub-pixel is four.

20. The pixel structure of claim 1 , wherein in each pixel unit, a number of the fourth sub-pixels is one, and a number of a first sub-pixel is two, a number of a second sub-pixel is two, a number of a third sub-pixel is two.