Method for driving liquid crystal display device

• US 8,624,938 B2
• Filed: 12/07/2009
• Issued: 01/07/2014
• Est. Priority Date: 12/19/2008
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime
• Primary Examiner(s): LEE, NICHOLAS J
• Application Number:
  US12/632,019
• Publication Number:
  US 20100156955A1
• Time in Patent Office: 1,492 Days
• Field of Search: None
• US Class Current: 345/690
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/0229 De-interlacing
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: H04N 5/142 Edging; Contouring
• CPC Class Codes: H04N 7/0117 involving conversion of the spatial resolution of the incoming video signal for graphics images G09G2340/0407
• CPC Class Codes: H04N 7/0125 one of the standards being a high definition standard

Abstract

A low-resolution image is displayed at high resolution and power consumption is reduced. Resolution is made higher by super-resolution processing. Then, display is performed with the luminance of a backlight controlled by local dimming after the super-resolution processing. By controlling the luminance of the backlight, power consumption can be reduced. Further, by performing the local dimming after the super-resolution processing, accurate display can be performed.

Claims

1. A method for driving an electronic device comprising a display device, the method comprising:

performing a super-resolution processing; and

performing an edge enhancement processing after the super-resolution processing.

2. The method for driving an electronic device according to claim 1, further comprising a step of performing converting interlace images into progressive images before the super-resolution processing.

3. The method for driving an electronic device according to claim 1, wherein the super-resolution processing is performed in parts of regions in a screen.

16. The method for driving an electronic device according to claim 1, further comprising a step of performing a frame interpolation processing after the edge enhancement processing.

17. The method for driving an electronic device according to claim 1, further comprising a step of performing a frame interpolation processing after the super-resolution processing and before the edge enhancement processing.

21. The method for driving an electronic device according to claim 1, wherein the display device is a liquid crystal display device.

4. A method for driving an electronic device comprising a display device, the method comprising:

performing a super-resolution processing;

performing an edge enhancement processing after the super-resolution processing; and

performing an overdrive processing after the edge enhancement processing.

5. The method for driving an electronic device according to claim 4, further comprising a step of performing converting interlace images into progressive images before the super-resolution processing.

6. The method for driving an electronic device according to claim 4, wherein the super-resolution processing is performed in parts of regions in a screen.

7. The method for driving an electronic device according to claim 4, wherein the overdrive processing is performed in parts of regions in a screen.

18. The method for driving an electronic device according to claim 4, further comprising a step of performing a frame interpolation processing after the edge enhancement processing and before the overdrive processing.

22. The method for driving an electronic device according to claim 4, wherein the display device is a liquid crystal display device.

8. A method for driving an electronic device comprising a display device, the method comprising:

performing a super-resolution processing;

performing an edge enhancement processing after the super-resolution processing; and

performing a local dimming processing after the edge enhancement processing.

9. The method for driving an electronic device according to claim 8, further comprising a step of performing converting interlace images into progressive images before the super-resolution processing.

10. The method for driving an electronic device according to claim 8, wherein the super-resolution processing is performed in parts of regions in a screen.

11. The method for driving an electronic device according to claim 8, wherein the edge enhancement processing is performed in parts of regions in a screen.

19. The method for driving an electronic device according to claim 8, further comprising a step of performing a frame interpolation processing after the edge enhancement processing and before the local dimming processing.

20. The method for driving an electronic device according to claim 8, further comprising a step of performing a frame interpolation processing after the edge enhancement processing and before the local dimming processing.

23. The method for driving an electronic device according to claim 8, wherein the display device is a liquid crystal display device.

12. A method for driving an electronic device comprising a display device, the method comprising:

performing a super-resolution processing;

performing an edge enhancement processing after the super-resolution processing;

performing a local dimming processing after the edge enhancement processing; and

performing an overdrive processing after the local dimming processing.

13. The method for driving an electronic device according to claim 12, further comprising a step of performing converting interlace images into progressive images before the super-resolution processing.

14. The method for driving an electronic device according to claim 12, wherein the super-resolution processing is performed in parts of regions in a screen.

15. The method for driving an electronic device according to claim 12, wherein the overdrive processing is performed in parts of regions in a screen.

24. The method for driving an electronic device according to claim 12, wherein the display device is a liquid crystal display device.