METHOD AND APPARATUS FOR ADAPTIVE BLACK FRAME INSERTION

• US 20130113694A1
• Filed: 12/28/2012
• Published: 05/09/2013
• Est. Priority Date: 04/06/2009
• Status: Active Grant

• Current Assignee: Akihiro Takagi, Cheng-Shih Chin, Maximino Vasquez, Yanli Zhang
• Original Assignee: Akihiro Takagi, Cheng-Shih Chin, Maximino Vasquez, Yanli Zhang
• Inventors: Takagi, Akihiro, Chin, Cheng-Shih, Zhang, Yanli, Vasquez, Maximino
• Granted Patent: US 8,791,894 B2
• Time in Patent Office: Days
• US Class Current: 345/89
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general

Abstract

In some embodiments, a display device may include a flat panel display a controller coupled to the flat panel display. The controller may be configured to determine an operating mode for the flat panel display among a plurality of operating modes including at least a first operating mode and a second operating mode. In the first operating mode, the controller may set the flat panel display to utilize a first frame rate and a first inversion mode to save power. In the second operating mode, the controller may set the flat panel display to utilize a second frame rate, a second inversion mode, and black frame insertion to improve image quality. The second frame rate may be faster than the first frame rate. The second inversion mode and black frame insertion may be mutually configured to maintain a DC balanced operation of the flat panel display. Other embodiments are disclosed and claimed.

Claims

1. A method of operating a display device, comprising:

determining an operating mode for the display device among a plurality of operating modes including at least a first operating mode and a second operating mode;

in the first operating mode, setting the display device to utilize a first frame rate and a first inversion mode to save power; and

in the second operating mode, setting the display device to utilize a second frame rate, a second inversion mode, and black frame insertion to improve image quality,

wherein the second frame rate is faster than the first frame rate,

and wherein the second inversion mode and black frame insertion are mutually configured to maintain a DC balanced operation of the display device.

2. The method of claim 1, wherein determining the operating mode for the display device comprises:

determining the operating mode based on an amount of motion in the display image.

3. The method of claim 2, wherein the first operating mode corresponds to a relatively low amount of motion in the display image.

4. The method of claim 3, wherein the first frame rate is about sixty hertz and the first inversion mode comprises a single frame inversion.

5. The method of claim 2, wherein the second operating mode corresponds to a relatively high amount of motion in the display image.

6. The method of claim 5, further comprising:

inserting a DC balanced black frame after each frame of image data in the second operating mode.

7. The method of claim 5, further comprising:

inserting a DC balanced black frame after every two frames of image data in the second operating mode.

8. The method of claim 5, wherein the second frame rate is about one hundred twenty hertz and the second inversion mode comprises a two frame inversion.

9. A display apparatus, comprising:

a flat panel display; and

a controller coupled to the flat panel display, wherein the controller is configured to;

determine an operating mode for the flat panel display among a plurality of operating modes including at least a first operating mode and a second operating mode;

in the first operating mode, set the flat panel display to utilize a first frame rate and a first inversion mode to save power; and

in the second operating mode, set the flat panel display to utilize a second frame rate, a second inversion mode, and black frame insertion to improve image quality,

wherein the second frame rate is faster than the first frame rate,

and wherein the second inversion mode and black frame insertion are mutually configured to maintain a DC balanced operation of the flat panel display.

10. The display apparatus of claim 9, wherein the controller is further configured to:

determine the operating mode based on an amount of motion in the display image.

11. The display apparatus of claim 10, wherein the first operating mode corresponds to a relatively low amount of motion in the display image.

12. The display apparatus of claim 11, wherein the first frame rate is about sixty hertz and the first inversion mode comprises a single frame inversion.

13. The display apparatus of claim 10, wherein the second operating mode corresponds to a relatively high amount of motion in the display image.

14. The display apparatus of claim 13, wherein a DC balanced black frame is inserted after each frame of image data in the second operating mode.

15. The display apparatus of claim 13, wherein a DC balanced black frame is inserted after every two frames of image data in the second operating mode.

16. The display apparatus of claim 13, wherein the second frame rate is about one hundred twenty hertz and the second inversion mode comprises a two frame inversion.

17. A processor-based electronic system, comprising:

a processor;

a memory coupled to the processor;

a controller coupled to the processor; and

a flat panel display coupled to the controller, wherein the controller is configured to control operation of the flat panel display,

and wherein the memory includes code which when executed causes the processor-based system to;

determine an operating mode for the flat panel display among a plurality of operating modes including at least a first operating mode and a second operating mode;

in the first operating mode, set the flat panel display to utilize a first frame rate and a first inversion mode to save power; and

in the second operating mode, set the flat panel display to utilize a second frame rate, a second inversion mode, and black frame insertion to improve image quality,

wherein the second frame rate is faster than the first frame rate,

and wherein the second inversion mode and black frame insertion are mutually configured to maintain a DC balanced operation of the flat panel display.

18. The processor-based electronic system of claim 17, wherein the memory further includes code to cause the processor-based system to:

determine the operating mode based on an amount of motion in the display image.

19. The processor-based electronic system of claim 18, wherein the first operating mode corresponds to a relatively low amount of motion in the display image.

20. The processor-based electronic system of claim 19, wherein the first frame rate is about sixty hertz and the first inversion mode comprises a single frame inversion.

21. The processor-based electronic system of claim 18, wherein the second operating mode corresponds to a relatively high amount of motion in the display image.

22. The processor-based electronic system of claim 21, wherein a DC balanced black frame is inserted after each frame of image data in the second operating mode.

23. The processor-based electronic system of claim 21, wherein a DC balanced black frame is inserted after every two frames of image data in the second operating mode.

24. The processor-based electronic system of claim 21, wherein the second frame rate is about one hundred twenty hertz and the second inversion mode comprises a two frame inversion.

25. The processor-based system of claim 17, wherein the flat panel display comprises a liquid crystal display.