Display driver, display device and method of operating display driver

1. A display driver, comprising:

a memory comprising a plurality of memory regions, each of the plurality of memory regions configured to store image data for one line of an image displayed in a frame; and

control circuitry configured to:

adjust a number of in-use memory regions of the plurality of memory regions that are used to store the image data by dividing a vertical resolution of the image by one or more candidates and selecting a candidate of the one or more candidates corresponding to a largest remainder, wherein each of the one or more candidates is associated with a different number of the plurality of memory regions; and

control the memory so that image data for respective lines of the image are cyclically stored in the in-use memory regions in a fixed order.

2. The display driver according to claim 1 , wherein the control circuitry is further configured to:

calculate remainders by dividing the vertical resolution of the image by the one or more candidates; and

select, based on the calculated remainders, the candidate corresponding to the largest remainder.

3. The display driver according to claim 2 , wherein selecting the candidate corresponding to the largest remainder comprises:

when none of the calculated remainders is 0, selecting the number of the in-use memory regions as one of the one or more candidates for which the calculated remainder is the largest.

4. The display driver according to claim 1 , wherein a number of the plurality of memory regions is less than the vertical resolution of the image.

5. The display driver according to claim 1 , further comprising register circuitry configured to store a register value,

wherein adjusting the number of in-use memory regions is further based on the register value.

6. The display driver according to claim 5 , wherein the register value corresponds to the vertical resolution of the image.

7. A display device, comprising;

a display panel; and

a display driver comprising:

a memory comprising a plurality of memory regions, each of the plurality of memory regions configured to store image data for one line of an image displayed in a frame;

control circuitry configured to:

adjust a number of in-use memory regions of the plurality of memory regions that are used to store the image data by dividing a vertical resolution of the image by one or more candidates and selecting a candidate of the one or more candidates corresponding to a largest remainder, wherein each of the one or more candidates is associated with a different number of the of memory regions; and

control the memory so that image data for respective lines of the image are cyclically stored r the in-use memory regions in a fixed order; and

drive circuitry configured to receive the image data stored in the memory and drive the display panel based on the image data.

8. The display device according to claim 7 , wherein the control circuitry is further configured to:

calculate remainders by dividing the vertical resolution of the image is by the one or more candidates; and

select, based on the calculated remainders, the candidate corresponding to the largest remainder.

9. The display device according to claim 8 , wherein selecting the candidate corresponding to the largest remainder comprises:

when none of the calculated remainders is 0, selecting the number of the in-use memory regions as one of the one or more candidates for which the calculated remainder is the largest.

10. The display device according to claim 7 , wherein a number of the plurality of memory regions is less than the vertical resolution of the image.

11. The display device according to claim 7 , further comprising register circuitry configured to store a register value,

wherein adjusting the number of in-use memory, regions is further based on the register value.

12. The display device according to claim 11 , wherein the register value corresponds to the vertical resolution of the image.

13. A method of operating a display driver comprising a plurality of memory regions, each of the plurality of memory regions configured to store image data for one line of an image displayed in a frame, the method comprising:

adjusting a number of in-use memo regions of the plurality of memory regions that are used to store the image data by dividing a vertical resolution of the image by one or more candidates and selecting candidate of the one or more candidates corresponding to a largest remainder, wherein each of the one or more candidates is associated with a different number of the plurality of memory regions; and

controlling the memory regions so that image data for respective lines of the image are cyclically stored in the in-use memory regions in a fixed order.

14. The method according to claim 13 , further comprising:

calculating remainders by dividing the vertical resolution of the image by the one or more candidates; and

selecting, based on the calculated remainders, the candidate corresponding to the largest remainder.

15. The method according to claim 14 , wherein selecting the candidate corresponding to the largest remainder comprises

when none of the calculated remainders is 0, selecting the number of the in-use memory regions as one of the one or more candidates for which the calculated remainder is the largest.

16. The method according to claim 13 , wherein a number of the plurality of memory regions is less than vertical resolution of the image.

17. The method according to claim 13 , wherein adjusting the number of in-use memory regions further based on a register value.

18. The method according to claim 17 , wherein the register value corresponds to the vertical resolution of the image.