Method for driving liquid crystal display device

• US 10,254,586 B2
• Filed: 05/17/2018
• Issued: 04/09/2019
• 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:
  US15/982,768
• Publication Number:
  US 20180267363A1
• Time in Patent Office: 327 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 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:

forming first image data by super-resolution processing from second image data; and

displaying the first image data on the display device,

wherein the electronic device is configured to vary intensity of the super-resolution processing on each portion of the second image data depending on content of the second image data.

2. The method for driving the electronic device according to claim 1, further comprising:

forming the second image data from third image data by performing an enlarging processing,

wherein a resolution of the second image data is higher than a resolution of the third image data.

3. The method for driving the electronic device according to claim 2, wherein the resolution of the second image data is equal to a resolution of the first image data.

4. The method for driving the electronic device according to claim 1, wherein the super-resolution processing is not performed on a flat portion of the second image data.

5. The method for driving the electronic device according to claim 4, wherein the super-resolution processing is performed on a textual portion of the second image data.

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

forming first image data by super-resolution processing from second image data; and

displaying the first image data on the display device,

wherein, when the second image data contains a flat portion and a textual portion, intensity of the super-resolution processing of the flat portion is different from intensity of the super-resolution processing of the textual portion.

7. The method for driving the electronic device according to claim 6, further comprising:

forming the second image data from third image data by performing an enlarging processing,

wherein a resolution of the second image data is higher than a resolution of the third image data.

8. The method for driving the electronic device according to claim 7, wherein the resolution of the second image data is equal to a resolution of the first image data.

9. The method for driving the electronic device according to claim 6, wherein the super-resolution processing is not performed on the flat portion.

10. The method for driving the electronic device according to claim 9, wherein the super-resolution processing is performed on the textual portion.