Display device and corresponding regional dimming driving method

1. A regional dimming driving method for a display device, the display device comprising multiple backlight sources respectively corresponding to multiple display regions of the display device, the regional dimming driving method comprising:

acquiring a brightness value of each of the display regions according to input image data;

processing and adjusting the brightness value of each of the display regions to acquire an adjusted brightness value of each of the display regions; and

driving the backlight sources according to the adjusted brightness values of the corresponding display regions, respectively;

wherein processing and adjusting the brightness value of each of the display regions comprises luminance detection filter adjustment, comprising:

acquiring a maximum brightness value and an average brightness value of a display image of each of the display regions according to the image data;

adjusting a weighting coefficient between the maximum brightness value and the average brightness value of the display image of each of the display regions; and

acquiring the adjusted brightness value of each of the display regions according to the maximum brightness value, the average brightness value and the weighting coefficient of the display image of each of the display regions.

2. The regional dimming driving method according to claim 1 , wherein processing and adjusting the brightness value of each of the display regions comprises temporal filter adjustment, comprising:

acquiring a brightness value of a current frame corresponding to each of the display regions;

acquiring a brightness value of a previous frame corresponding to each of the display regions;

adjusting a weighting coefficient between the brightness value of the previous frame and the brightness value of the current frame corresponding to each of the display regions; and

acquiring the adjusted brightness value of each of the display regions according to the brightness value of the current frame, the brightness value of the previous frame and the weighting coefficient corresponding to the each of the display regions.

3. The regional dimming driving method according to claim 2 , wherein when the brightness value of the current frame corresponding to the display regions is greater than a predetermined threshold, the weighting coefficient is set to 0.

4. The regional dimming driving method according to claim 1 , wherein processing and adjusting the brightness value of each of the display regions comprises spatial filter adjusting, comprising:

acquiring a brightness value of a central display region and a brightness value of a peripheral display region; and

performing adjustment according the brightness value of the central display region and the brightness value of the peripheral display region to acquire an adjusted brightness value of the central display region and an adjusted brightness value of the peripheral display region.

5. The regional dimming driving method according to claim 4 , wherein performing adjustment according to the brightness value of the central display region and the brightness value of the peripheral display region to acquire the adjusted brightness value of the central display region and the adjusted brightness value of the peripheral display region further comprises:

determining whether the brightness value of the central display region is smaller than the brightness value of the peripheral display region;

when it is determined that the brightness value of the central display region is smaller than the brightness value of the peripheral display region, selecting, between the brightness value of the central display region and the brightness value of the peripheral display region, one having a greater difference from a predetermined threshold, as the adjusted brightness value of the central display region; and

conversely, when it is determined that the brightness value of the central display region is not smaller than the brightness value of the peripheral display region, keeping the brightness value of the central display region and the brightness value of the peripheral display region unchanged.

6. The regional dimming driving method according to claim 4 , wherein performing adjustment according to the brightness value of the central display region and the brightness value of the peripheral display region to acquire the adjusted brightness value of the central display region and the adjusted brightness value of the peripheral display region further comprises:

determining whether the brightness value of the central display region is greater than the brightness value of the peripheral display region;

when it is determined that the brightness value of the central display region is greater than the brightness value of the peripheral display region, acquiring a weighting coefficient between the brightness value of the central display region and the brightness value of the peripheral display region, and acquiring the adjusted brightness value of the peripheral display region according to the brightness value of the peripheral display region, the brightness value of the central display region and the weighting coefficient; and

conversely, when it is determined that the brightness value of the central display region is not greater than the brightness value of the peripheral display region, keeping the brightness value of the peripheral region around the central display region unchanged.

7. The regional dimming driving method according to claim 1 , wherein processing and adjusting the brightness value of each of the display regions comprises backlight gamma adjustment, comprising:

performing backlight gamma curve adjustment on the brightness value of each of the display regions to acquire the adjusted brightness of each of the display region.

8. The regional dimming driving method according to claim 1 , wherein processing and adjusting the brightness value of each of the display regions comprises local dimming strength adjustment, comprising:

adjusting a local dimming factor of the display device; and

acquiring the adjusted brightness value of each of the display regions according to the brightness value of each of the display regions, the local dimming factor and a maximum brightness value of backlight source.

9. The regional dimming driving method according to claim 1 , wherein processing and adjusting the brightness value of each of the display regions comprises global backlight strength adjustment, comprising:

adjusting a local dimming factor of the display device; and

acquiring the adjusted brightness value of each of the display regions according to the brightness value of each of the display region and a backlight factor.

10. A display device, comprising:

multiple backlight sources, respectively corresponding to multiple display regions of the display device;

a processor, reading input image data, acquiring a brightness value of each of the display regions according to the image data, and processing and adjusting the brightness value of each of the display regions to acquire an adjusted brightness value of each of the display regions; and

a driving circuit, electrically connected to the processor and the multiple backlight sources, receiving the brightness value of each of the display regions, and generating a corresponding driving signal according to the adjusted brightness value of each of the display regions, so as to respectively drive the multiple backlight sources;

wherein the processor processing and adjusting the brightness value of each of the display regions to acquire an adjusted brightness value of each of the display regions comprises luminance detection filter adjustment, comprising:

acquiring a maximum brightness value and an average brightness value of a display image of each of the display regions according to the image data;

adjusting a weighting coefficient between the maximum brightness value and the average brightness value of the display image of each of the display regions; and

acquiring the adjusted brightness value of each of the display regions according to the maximum brightness value, the average brightness value and the weighting coefficient of the display image of each of the display regions.

11. The display device according to claim 10 , wherein the processor processing and adjusting the brightness value of each of the display regions comprises temporal filter adjustment, comprising:

acquiring a brightness value of a current frame corresponding to each of the display regions;

acquiring a brightness value of a previous frame corresponding to each of the display regions;

adjusting a weighting coefficient between the brightness value of the previous frame and the brightness value of the current frame corresponding to each of the display regions; and

acquiring the adjusted brightness value of each of the display regions according to the brightness value of the current frame, the brightness value of the previous frame and the weighting coefficient corresponding to the each of the display regions.

12. The display device according to claim 11 , wherein when the brightness value of the current frame corresponding to the display regions is greater than a predetermined threshold, the weighting coefficient is set to 0.

13. The display device according to claim 10 , wherein the processor processing and adjusting the brightness value of each of the display regions comprises spatial filter adjusting, comprising:

acquiring a brightness value of a central display region and a brightness value of a peripheral display region; and

performing adjustment according the brightness value of the central display region and the brightness value of the peripheral display region to acquire an adjusted brightness value of the central display region and an adjusted brightness value of the peripheral display region.

14. The display device according to claim 13 , wherein the processor performing adjustment according to the brightness value of the central display region and the brightness value of the peripheral display region to acquire the adjusted brightness value of the central display region and the adjusted brightness value of the peripheral display region further comprises:

determining whether the brightness value of the central display region is smaller than the brightness value of the peripheral display region;

when it is determined that the brightness value of the central display region is smaller than the brightness value of the peripheral display region, selecting, between the brightness value of the central display region and the brightness value of the peripheral display region, one having a greater difference from a predetermined threshold, as the adjusted brightness value of the central display region; and

conversely, when it is determined that the brightness value of the central display region is not smaller than the brightness value of the peripheral display region, keeping the brightness value of the central display region and the brightness value of the peripheral display region unchanged.

15. The display device according to claim 13 , wherein performing adjustment according to the brightness value of the central display region and the brightness value of the peripheral display region to acquire the adjusted brightness value of the central display region and the adjusted brightness value of the peripheral display region further comprises:

determining whether the brightness value of the central display region is greater than the brightness value of the peripheral display region;

when it is determined that the brightness value of the central display region is greater than the brightness value of the peripheral display region, acquiring a weighting coefficient between the brightness value of the central display region and the brightness value of the peripheral display region, and acquiring the adjusted brightness value of the peripheral display region according to the brightness value of the peripheral display region, the brightness value of the central display region and the weighting coefficient; and

conversely, when it is determined that the brightness value of the central display region is not greater than the brightness value of the peripheral display region, keeping the brightness value of the peripheral region around the central display region unchanged.

16. The display device according to claim 10 , wherein the processor processing and adjusting the brightness value of each of the display regions comprises backlight gamma adjustment, comprising:

performing backlight gamma curve adjustment on the brightness value of each of the display regions to acquire the adjusted brightness value of each of the display regions.

17. The display device according to claim 10 , wherein the processor processing and adjusting the brightness value of each of the display regions comprises local dimming strength adjustment, comprising:

adjusting a local dimming factor of the display device; and

acquiring the adjusted brightness value of each of the display regions according to the brightness value of each of the display regions, the local dimming factor and a maximum brightness value of the backlight source.

18. The display device according to claim 10 , wherein the processor processing and adjusting the brightness value of each of the display regions comprises global backlight strength adjustment, comprising:

adjusting a local dimming factor of the display device; and

acquiring the adjusted brightness value of each of the display regions according to the brightness value of each of the display region and a backlight factor.