Display apparatus with dynamic blinking backlight and control method and device thereof

1. A dynamic blinking backlight control method for controlling the lighting status of multiple backlights of a display panel, comprising:

detecting the motion condition of a frame to obtain a motion detection result, wherein the display panel displays images in accordance with the frame;

determining a scanning frequency in accordance with the motion detection result; and

controlling the lighting status of the backlights sequentially and respectively in accordance with the scanning frequency.

2. The dynamic blinking backlight control method as claimed in claim 1 , wherein the steps of detecting the motion condition of the frame comprise:

providing a previously displayed frame;

comparing the pixel data in the corresponding position of the previously displayed frame and the frame to be displayed presently, to obtain a differential pixel percentage; and

obtaining the motion detection result in accordance with the differential pixel percentage.

3. The dynamic blinking backlight control method as claimed in claim 2 , wherein the steps of determining the scanning frequency comprise:

determining the scanning frequency as a high frequency when the differential pixel percentage shown in the motion detection result is larger than an upper limit value; and

determining the scanning frequency as a low frequency when the differential pixel percentage is smaller than a lower limit value.

4. The dynamic blinking backlight control method as claimed in claim 1 , wherein the steps of controlling the lighting status of the backlights sequentially include:

disposing the backlights at the back of the display panel along the direction of a scan line of the display panel; and

lighting at least one of the backlights sequentially in accordance with the scanning frequency, and turning off the other backlights.

5. The dynamic blinking backlight control method as claimed in claim 1 , further comprising:

keeping the backlights lit without blinking when the motion detection result shows that the frame is a static frame.

6. The dynamic blinking backlight control method as claimed in claim 1 , further comprising:

determining the brightness of the backlights when they are lit in accordance with the scanning frequency; and

keeping the backlights lit without blinking in accordance with a command.

7. The dynamic blinking backlight control method as claimed in claim 6 , wherein the command is generated by a button.

8. The dynamic blinking backlight control method as claimed in claim 6 , wherein the command is generated by an application executed by a host, and the host enables the display panel to display corresponding images by outputting the frame.

9. A dynamic blinking backlight control device, comprising:

a motion detection circuit, used for detecting the motion condition of a frame to output a motion detection result;

a control circuit, electrically connected to the motion detection circuit, used for determining a scanning frequency in accordance with the motion detection result;

multiple backlights, used for providing the desired light source for a display panel to display images; and

a light source driving circuit, electrically connected to the control circuit and the backlights, wherein the light source driving circuit controls the lighting status of the backlights sequentially and respectively in accordance with the scanning frequency determined by the control circuit.

10. The dynamic blinking backlight control device as claimed in claim 9 , wherein the control circuit is further electrically connected to a timing controller, and the timing controller scans the display panel via a scanning driver based on the scanning frequency determined by the control circuit.

11. The dynamic blinking backlight control device as claimed in claim 9 , further comprising:

a memory, used for storing and providing the previously displayed frame;

wherein, the motion detection circuit further electrically connected to the memory is used for comparing the pixel data in the corresponding position in the previously displayed frame and the frame to be displayed presently, thereby outputting a differential pixel percentage; and

the control circuit determines the scanning frequency in accordance with the differential pixel percentage.

12. The dynamic blinking backlight control device as claimed in claim 11 , wherein

when the differential pixel percentage output by the motion detection circuit is larger than an upper limit value, the control circuit determines the scanning frequency is a high frequency; and

when the differential pixel percentage output by the motion detection circuit is smaller than a lower limit value, the control circuit determines the scanning frequency is a low frequency.

13. The dynamic blinking backlight control device as claimed in claim 9 , wherein

the backlights are disposed at the back of the display panel along the direction of a scan line of the display panel; and

the light source driving circuit lights at least one of the backlights via the scanning frequency determined by the control circuit and turns off the other backlights.

14. The dynamic blinking backlight control device as claimed in claim 9 , wherein when the motion detection result of the motion detection circuit shows that the frame is a static frame, the control circuit keeps the backlights lit without blinking by controlling the light source driving circuit.

15. The dynamic blinking backlight control device as claimed in claim 9 , wherein the control circuit further receives a command and keeps the backlights lit without blinking by controlling the light source driving circuit in accordance with the command.

16. The dynamic blinking backlight control device as claimed in claim 15 , wherein the command is generated by a button.

17. The dynamic blinking backlight control device as claimed in claim 15 , wherein the command is generated by an application executed by a host, and the host enables the display panel to display corresponding images by outputting the frame.

18. The dynamic blinking backlight control device as claimed in claim 9 , wherein the control circuit further determines the brightness of the backlights when they are lit via controlling the light source driving circuit in accordance with the scanning frequency.

19. A display apparatus with dynamic blinking backlight, comprising:

a display panel, for displaying images;

a display driver, electrically connected to the display panel, scans the display panel in accordance with a scanning frequency, and drives the display panel in accordance with a frame to display corresponding images;

a motion detection circuit, used for detecting the motion condition of the frame to output a motion detection result;

a control circuit, electrically connected to the motion detection circuit and the display driver, determines the scanning frequency in accordance with the motion detection result;

multiple backlights, used for providing the desired light source for the display panel to display images; and

a light source driving circuit, electrically connected to the control circuit and the backlights, wherein the light source driving circuit controls the lighting status of the backlights sequentially and respectively in accordance with the scanning frequency determined by the control circuit.

20. The display apparatus with dynamic blinking backlight as claimed in claim 19 , further comprising:

a memory, used for storing and providing the previously displayed frame; wherein the motion detection circuit further electrically connected to the memory is used for comparing the pixel data in the corresponding position in the previously displayed frame and the frame to be displayed presently, thereby outputting a differential pixel percentage;

when the differential pixel percentage output by the motion detection circuit is larger than an upper limit value, the control circuit determines the scanning frequency is a high frequency;

when the differential pixel percentage output by the motion detection circuit is smaller than a lower limit value, the control circuit determines the scanning frequency is a low frequency;

the light source driving circuit lights at least one of the backlights sequentially in accordance with the scanning frequency determined by the control circuit, and turns off the other backlights; and

when the motion detection result of the motion detection circuit shows that the frame is a static frame, the control circuit keeps the backlights lit without blinking by controlling the light source driving circuit.