Display device, and method for modifying image displaying on the display device

1. A method for modifying image displaying on a display panel, wherein the display panel comprises a pixel array composed of a plurality of pixel points each comprising three subpixels of three different colors which are arranged in a delta arrangement, wherein the method comprises:

receiving original image signals which comprise brightness values of respective subpixels;

according to the original image signals, identifying edge pixel points of an object to be displayed on the display panel as the first pixel points;

for each subpixel in each of the first pixel points, modifying the brightness value of the subpixel according to the brightness value of a subpixel having the same color as the subpixel in at least one of pixel points which are adjacent to the first pixel point; and

providing the pixel array with modified image signals according to the modified brightness values of respective subpixels in the first pixel points;

wherein the brightness values of respective subpixels in the first pixel points are modified using a low pass filter, and parameters of the low pass filter are dependent on a size of each subpixel and distances between subpixels.

2. The method according to claim 1 , wherein the plurality of pixel points are arranged in a row direction and a column direction, and any two adjacent subpixels have different colors.

3. The method according to claim 2 , wherein, for each subpixel in each of the first pixel points, the brightness value of the subpixel is modified according to the brightness value of a subpixel having the same color as the subpixel in at least one of pixel points which are adjacent to the first pixel point in the row and/or column direction.

4. The method according to claim 3 , wherein the modifying comprises:

modifying the brightness value of each subpixel in the first pixel points using a first brightness modifying method; or

modifying the brightness value of each subpixel in the first pixel points using a second brightness modifying method; or

for any two first pixel points which are adjacent with each other in the row direction, modifying the brightness value of each subpixel in one of the two pixel points using the first brightness modifying method, and modifying the brightness value of each subpixel in the other one of the two pixel points using the second brightness modifying method; and for any two first pixel points which are adjacent with each other in the column direction, modifying the brightness value of each subpixel in the two pixel points using the same brightness modifying method.

5. The method according to claim 4 , wherein the first brightness modifying method comprises:

for each subpixel having a first color in each of the first pixel points, modifying the brightness value of the subpixel having the first color according to the brightness value of a subpixel having the first color in one pixel point which is immediately above and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the first color in one pixel point which is at immediate left of and adjacent to the first pixel point in the row direction;

for each subpixel having a second color in each of the first pixel points, modifying the brightness value of the subpixel having the second color according to the brightness value of a subpixel having the second color in one pixel point which is immediately above and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the second color in one pixel point which is at immediate right of and adjacent to the first pixel point in the row direction; and

for each subpixel having a third color in each of the first pixel points, modifying the brightness value of the subpixel having the third color according to the brightness value of a subpixel having the third color in one pixel point which is immediately below the first pixel point in the column direction.

6. The method according to claim 5 , wherein the first color, the second color, and the third color are green, red, and blue, respectively; or the first color, the second color, and the third color are red, green, and blue, respectively.

7. The method according to claim 6 , wherein an area of each blue subpixel is greater than an area of either of each red subpixel and green subpixel.

8. The method according to claim 4 , wherein the second brightness modifying method comprises:

for each subpixel having a first color in each of the first pixel points, modifying the brightness value of the subpixel having the first color according to the brightness value of a subpixel having the first color in one pixel point which is immediately below and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the first color in one pixel point which is at immediate left of and adjacent to the first pixel point in the row direction;

for each subpixel having a second color in each of the first pixel points, modifying the brightness value of the subpixel having the second color according to the brightness value of a subpixel having the second color in one pixel point which is immediately below and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the second color in one pixel point which is at immediate right of and adjacent to the first pixel point in the row direction; and

for each subpixel having a third color in each of the first pixel points, modifying the brightness value of the subpixel having the third color according to the brightness value of a subpixel having the third color in one pixel point which is immediately above the first pixel point in the column direction.

9. A display device, comprising:

a display panel, comprising a pixel array composed of a plurality of pixel points each comprising three subpixels of three different colors which are arranged in a delta arrangement;

an image processing apparatus configured to:

receive original image signals which comprise brightness values of respective subpixels;

according to the original image signals, identify edge pixel points of an object to be displayed on the display panel as the first pixel points;

for each subpixel in each of the first pixel points, modify the brightness value of the subpixel according to the brightness value of a subpixel having the same color as the subpixel in at least one of pixel points which are adjacent to the first pixel point; and

provide the pixel array with modified image signals according to the modified brightness values of respective subpixels in the first pixel points;

wherein the brightness values of respective subpixels in the first pixel points are modified using a low pass filter, and parameters of the low pass filter are dependent on a size of each subpixel and distances between subpixels.

10. The display device according to claim 9 , wherein the display device is an OLED display device.

11. The display device according to claim 9 , wherein the plurality of pixel points are arranged in a row direction and a column direction, and any two adjacent subpixels have different colors.

12. The display device according to claim 11 , wherein for each subpixel in each of the first pixel points, the brightness value of the subpixel is modified according to the brightness value of a subpixel having the same color as the subpixel in at least one of pixel points which are adjacent to the first pixel point in the row and/or column direction.

13. The display device according to claim 12 , wherein the image processing apparatus is configured to:

modify the brightness value of each subpixel in the first pixel points using a first brightness modifying method; or

modify the brightness value of each subpixel in the first pixel points using a second brightness modifying method; or

for any two first pixel points which are adjacent with each other in the row direction, modify the brightness value of each subpixel in one of the two pixel points using the first brightness modifying method, and modify the brightness value of each subpixel in the other one of the two pixel points using the second brightness modifying method; and for any two first pixel points which are adjacent with each other in the column direction, modify the brightness value of each subpixel in the two pixel points using the same brightness modifying method.

14. The display panel according to claim 13 , wherein the image processing apparatus is configured to:

for each subpixel having a first color in each of the first pixel points, modify the brightness value of the subpixel having the first color according to the brightness value of a subpixel having the first color in one pixel point which is immediately above and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the first color in one pixel point which is at immediate left of and adjacent to the first pixel point in the row direction;

for each subpixel having a second color in each of the first pixel points, modify the brightness value of the subpixel having the second color according to the brightness value of a subpixel having the second color in one pixel point which is immediately above and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the second color in one pixel point which is at immediate right of and adjacent to the first pixel point in the row direction; and

for each subpixel having a third color in each of the first pixel points, modify the brightness value of the subpixel having the third color according to the brightness value of a subpixel having the third color in one pixel point which is immediately below the first pixel point in the column direction.

15. The display device according to claim 14 , wherein the first color, the second color, and the third color are green, red, and blue, respectively; or the first color, the second color, and the third color are red, green, and blue, respectively.

16. The display device according to claim 15 , wherein an area of each blue subpixel is greater than an area of either of each red subpixel and green subpixel.

17. The display device according to claim 13 , wherein the image processing apparatus is configured to:

for each subpixel having a first color in each of the first pixel points, modify the brightness value of the subpixel having the first color according to the brightness value of a subpixel having the first color in one pixel point which is immediately below and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the first color in one pixel point which is at immediate left of and adjacent to the first pixel point in the row direction;

for each subpixel having a second color in each of the first pixel points, modify the brightness value of the subpixel having the second color according to the brightness value of a subpixel having the second color in one pixel point which is immediately below and adjacent to the first pixel point in the column direction and the brightness value of a subpixel having the second color in one pixel point which is at immediate right of and adjacent to the first pixel point in the row direction; and

for each subpixel having a third color in each of the first pixel points, modify the brightness value of the subpixel having the third color according to the brightness value of a subpixel having the third color in one pixel point which is immediately above the first pixel point in the column direction.