Display driving device and method for driving display

1. A display driving device, comprising:

a host transmitting an image data and a synchronization signal; and

a driving chip receiving the image data and the synchronization signal and driving a display panel to display a plurality of image frames, the driving chip comprising:

a storage unit storing the image data;

a driving module coupled to the storage unit, the driving module driving the display panel to display the image frames according to the image data from the host and a timing generator frequency of the driving module; and

a control circuit coupled to the host, the driving module, and the storage unit, the control circuit detecting a target frequency of the synchronization signal and the timing generator frequency of the driving module, comparing the target frequency and the timing generator frequency, outputting an adjustment value according to the comparison result, and adjusting the timing generator frequency of driving module according to the adjustment value.

2. The display driving device according to claim 1 , wherein when the timing generator frequency and the target frequency are substantially the same, the control circuit maintains the timing generator frequency.

3. The display driving device according to claim 1 , wherein the control circuit adjusts the timing generator frequency of the driving module at least one image frame after the comparison result has been obtained.

4. The display driving device according to claim 1 , wherein the synchronization signal comprises a vertical synchronization signal and a horizontal synchronization signal.

5. The display driving device according to claim 1 , wherein the synchronization signal comprises a periodic protocol command.

6. The display driving device according to claim 5 , wherein the periodic protocol command is defined by the Mobile Industry Processor Interface (MIPI).

7. The display driving device according to claim 1 , wherein the host further transmits an external clock signal to the driving chip, and the control circuit adjusts the timing generator frequency according to a clock frequency of the external clock signal.

8. The display driving device according to claim 1 , wherein the host transmits the image data and the synchronization signal by a continuous clock mode.

9. The display driving device according to claim 1 , wherein the host transmits the image data and the synchronization signal by a non-continuous clock mode.

10. The display driving device according to claim 1 , wherein the driving module comprises:

a timing generator coupled to the control circuit and the storage unit, the timing generator generating a drive clock signal according to the image data, wherein the timing generator frequency is determined by the drive clock signal; and

a driving unit coupled to the timing generator and the display panel, the driving unit driving the display panel to display the image frames according to the image data and the timing generator frequency.

11. A method for driving a display, comprising:

providing, by a host, an image data and a synchronization signal;

transmitting a sleep-out command to a driving module;

detecting a target frequency of the synchronization signal and a timing generator frequency of the driving module;

comparing the target frequency and the timing generator frequency;

outputting an adjustment value according to the comparison result and adjusting the timing generator frequency of the driving module according to the adjustment value; and

driving a display panel of the display to display a plurality of image frames according to the image data of the host and the timing generator frequency of the driving module.

12. The method for driving the display according to claim 11 , wherein when the timing generator frequency and the target frequency are substantially the same, the method further comprises maintaining the timing generator frequency.

13. The method for driving the display according to claim 11 , wherein the timing generator frequency of the driving module is adjusted at least one image frame after the comparison result has been obtained.

14. The method for driving the display according to claim 11 , wherein the synchronization signal comprises a vertical synchronization signal and a horizontal synchronization signal.

15. The method for driving the display according to claim 11 , wherein the synchronization signal comprises a periodic protocol command.

16. The method for driving the display according to claim 15 , wherein the periodic protocol command is defined by the Mobile Industry Processor Interface (MIPI).

17. The method for driving the display according to claim 11 , further comprising:

transmitting, by the host, an external clock signal to the driving module; and

adjusting the timing generator frequency according to a clock frequency of the external clock signal.

18. The method for driving the display according to claim 11 , wherein the host transmits the image data and the synchronization signal by a continuous clock mode.

19. The method for driving the display according to claim 11 , wherein the host transmits the image data and the synchronization signal by a non-continuous clock mode.

20. The method for driving the display according to claim 11 , wherein the driving module comprises:

a timing generator coupled to a control circuit and a storage unit, the timing generator generating a drive clock signal, wherein the timing generator frequency is determined by the drive clock signal; and

a driving unit coupled to the timing generator and the display panel, the driving unit driving the display panel to display the image frames according to the image data and the timing generator frequency.