Device and method for driving display panel
A display driver comprises image processing circuitry and drive circuitry. The image processing circuitry is configured to output display image data representing a display image comprising an effective area to be displayed in a display area of a display panel and an invalid area not to be displayed in the display area. The drive circuitry drives the display panel based on the display image data comprising effective pixel data associated with first pixels included in the effective area and invalid pixel data associated with second pixels included in the invalid area. Effective pixel data associated with first pixels located within a boundary area adjacent to the invalid area is set to first grayscale values. The invalid pixel data associated with second pixels located within an insert area defined in the invalid area is set to second grayscale values comprising a value different from the first grayscale values.
1. A display driver, comprising:
image processing circuitry configured to output display image data representing a display image comprising an effective area to be displayed in a display area of a display panel and an invalid area not to be displayed in the display area; and
drive circuitry configured to drive the display panel based on the display image data,
wherein the display image data comprises:
effective pixel data associated with first pixels in the effective area; and
invalid pixel data associated with second pixels in the invalid area,
wherein the effective pixel data associated with one or more of the first pixels is set to first grayscale values, the one or more of the first pixels located within a boundary area adjacent to the invalid area, and
wherein the invalid pixel data associated with one or more of the second pixels is set to second grayscale values, the one or more of the second pixels located within an insert area defined in the invalid area, the second grayscale values comprising a value different from the first grayscale values.
2. The display driver according to claim 1 , wherein a boundary between the effective area and the invalid area comprises a line segment parallel to a scan line of the display panel.
3. The display driver according to claim 2 , wherein the insert area is aligned to at least a portion of the line segment of the boundary.
4. The display driver according to claim 1 , where the image processing circuitry is further configured to set the effective pixel data associated with the one or more of the first pixels located within the boundary area to the first grayscale values.
5. The display driver according to claim 1 , where the image processing circuitry is further configured to set the invalid pixel data associated with the one or more of the second pixels located within the insert area to the second grayscale values.
6. The display driver according to claim 1 , wherein the second grayscale values are larger than the first grayscale values.
7. The display driver according to claim 1 , wherein the second grayscale values comprises a maximum grayscale value.
8. The display driver according to claim 1 , further comprising an interface configured to receive image data from a source external to the display driver,
wherein the invalid pixel data associated with the one or more of the second pixels located within the insert area comprises grayscale values set to pixel data associated with the one or more of the second pixels in the received image data.
9. The display driver according to claim 1 , wherein the first grayscale values comprises a minimum grayscale value.
10. The display driver according to claim 1 , further comprising an interface configured to receive image data from a source external to the display driver,
wherein the first grayscale values are determined based on third grayscale values set to pixel data associated with the one or more of the first pixels in the received image data.
11. The display driver according to claim 10 , wherein the first grayscale values are determined by blending the third grayscale values with a fourth grayscale value.
12. The display driver according to claim 1 , wherein the display image data is generated such that one or more the second pixels are located within the insert area, and wherein the one or more of the second pixels being adjacent to the effective area.
13. A non-transitory storage medium having a computer-readable program code embodied therewith, the computer-readable program code executable by one or more computer processors to generate display image data for driving a display panel based on original image data representing a display image comprising an effective area to be displayed in a display area of the display panel and an invalid area not to be displayed in the display area, wherein the display image data comprises:
effective pixel data associated with first pixels in the effective area; and
invalid pixel data associated with second pixels in the invalid area,
wherein generating the display image data comprises setting the effective pixel data associated with one or more of the first pixels to first grayscale values, the one or more of the first pixels located within a boundary area adjacent to the invalid area, and
wherein the invalid pixel data associated with one or more the second pixels is set to second grayscale values, the one or more of the second pixels located within an insert area defined in the invalid area and the second grayscale values comprise a value different from the first grayscale values.
14. The non-transitory storage medium according to claim 13 , wherein a boundary between the effective area and the invalid area comprises a line segment parallel to a scan line of the display panel.
15. The non-transitory storage medium according to claim 14 , wherein the insert area is aligned to at least a portion of the line segment of the boundary.
16. The non-transitory storage medium according to claim 13 , wherein generating the display image data comprises setting the invalid pixel data associated with the one or more of the second pixels located within the insert area to the second grayscale values.
17. The non-transitory storage medium according to claim 13 , wherein the second grayscale values are larger than the first grayscale values.
18. The non-transitory storage medium according to claim 13 , wherein the invalid pixel data associated with the one or more of the second pixels located within the insert area comprises grayscale values set to pixels data associated with the one or more of the second pixels in the original image data.
19. A method, comprising:
generating display image data for driving a display panel based on an original image data representing a display image comprising an effective area to be displayed in a display area of the display panel and an invalid area not to be displayed in the display area,
wherein the display image data comprises:
effective pixel data associated with first pixels in the effective area; and
invalid pixel data associated with second pixels in the invalid area, wherein generating the display image data comprises:
setting the effective pixel data associated with one or more of the first pixels to first grayscale values, the at least some of the first pixels located within a boundary area adjacent to the invalid area, and
setting the invalid pixel data associated with one or more of the second pixels to second grayscale values, the one or more of the second pixels located within an insert area defined in the invalid area, and
wherein the second grayscale values comprises a value different from the first grayscale values.
20. The method according to claim 19 , wherein the second grayscale values are larger than the first grayscale values.