Method for driving liquid crystal display device

• US 10,578,920 B2
• Filed: 03/25/2019
• Issued: 03/03/2020
• 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:
  US16/362,737
• Publication Number:
  US 20190219873A1
• Time in Patent Office: 344 Days
• Field of Search: None
• 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 a display device, comprising:

performing a super-resolution processing; and

performing a frame interpolation processing after the super-resolution processing.

2. The method for driving a display device according to claim 1, wherein performing converting interlace images into progressive images before the super-resolution processing.

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

4. The method for driving a display device according to claim 1, wherein the frame interpolation processing is performed in parts of regions in a screen.

5. The method for driving a display device according to claim 1, further comprising a step of performing a local dimming processing after the frame interpolation processing.

6. The method for driving a display device according to claim 5, wherein the local dimming processing is performed in parts of regions in a screen.

7. The method for driving a display device according to claim 1, further comprising a step of performing an overdrive processing after the frame interpolation processing.

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

9. The method for driving a display device according to claim 1, further comprising a step of an edge enhancement processing after the super-resolution processing.

10. The method for driving a display device according to claim 9, the edge enhancement processing is performed before the frame interpolation processing.

11. A method for driving a display device, comprising:

performing an enlarging processing;

performing a super-resolution processing after the enlarging processing; and

performing a frame interpolation processing after the super-resolution processing.

12. The method for driving a display device according to claim 11, wherein performing converting interlace images into progressive images before the super-resolution processing.

13. The method for driving a display device according to claim 11, wherein the super-resolution processing is performed in parts of regions in a screen.

14. The method for driving a display device according to claim 11, wherein the frame interpolation processing is performed in parts of regions in a screen.

15. The method for driving a display device according to claim 11, further comprising a step of performing a local dimming processing after the frame interpolation processing.

16. The method for driving a display device according to claim 15, wherein the local dimming processing is performed in parts of regions in a screen.

17. The method for driving a display device according to claim 11, further comprising a step of performing an overdrive processing after the frame interpolation processing.

18. The method for driving a display device according to claim 17, wherein the overdrive processing is performed in parts of regions in a screen.

19. The method for driving a display device according to claim 11, further comprising a step of an edge enhancement processing after the super-resolution processing.

20. The method for driving a display device according to claim 19, the edge enhancement processing is performed before the frame interpolation processing.