DISPLAY DEVICE AND DISPLAY METHOD

• US 20130120475A1
• Filed: 11/02/2012
• Published: 05/16/2013
• Est. Priority Date: 11/10/2011
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Katsu, Yoshihiro, Nishi, Tomohiro, Ohta, Akihiro, Asano, Mitsuyasu
• Granted Patent: US 9,159,273 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• 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

Abstract

Disclosed herein is a display device including: a liquid crystal display section adapted to display an image based on a video signal; a backlight; and a processing section adapted to correct the video signal and set the luminance of the backlight based on two pieces of information, a peak level of the video signal in a display screen or in each of a plurality of partial display areas into which the display screen is divided, and factor data obtained from a data map made up of a reference position on the display screen and the factor data that are associated with each other.

Claims

1. A display device comprising:

a liquid crystal display section adapted to display an image based on a video signal;

a backlight; and

a processing section adapted to correct the video signal and set the luminance of the backlight based on two pieces of information, a peak level of the video signal in a display screen or in each of a plurality of partial display areas into which the display screen is divided, and factor data obtained from a data map made up of a reference position on the display screen and the factor data that are associated with each other.

2. The display device of claim 1, wherein

the peak level is a peak level of an image to be displayed in each of the partial display areas, and

the processing section uses the data map to set a position on the display screen where the peak level occurs in each of the partial display areas as the reference position so as to acquire factor data associated with the reference position.

3. The display device of claim 2, wherein

the backlight has a plurality of partial light-emitting sections each of which is associated with one of the partial display areas, and

the processing section corrects the video signal for each of the partial display areas and sets the luminance of the associated partial light-emitting section based on the peak level and factor data.

4. The display device of claim 2, wherein

the data map is divided into a plurality of factor data areas that differ in the factor data from each other.

5. The display device of claim 4, wherein

if the reference position belongs to a specific factor data area of the plurality of factor data areas, the processing section corrects the video signal so that the luminance of the backlight is set to a higher level and the transmittance of the liquid crystal display section is set to a lower level than if the reference position belongs to other factor data area.

6. The display device of claim 5, wherein

the specific factor data area is provided at and near the center of the display screen.

7. The display device of claim 5 comprising:

an image recognition section adapted to identify a predetermined image in the image to be displayed based on the video signal.

8. The display device of claim 7, wherein

the specific factor data area is an area where the predetermined image has been identified.

9. The display device of claim 7, wherein

the specific factor data area includes an area associated with the center and near the center of the display screen and the area where the predetermined image has been identified.

10. The display device of claim 7, wherein

the predetermined image is a face image.

11. The display device of claim 7, wherein

the predetermined image is an image of a portion of a displayed image that attracts much attention of a viewer.

12. The display device of claim 5 comprising:

a data map generation section adapted to generate a data map containing the specific factor data.

13. The display device of claim 1, wherein

the peak level is a peak level of an image to be displayed in each of the partial display areas, and

the processing section uses the data map to set a position on the display screen in each of the partial display areas as the reference position so as to acquire factor data associated with the reference position.

14. The display device of claim 13, wherein

the backlight has a plurality of partial light-emitting sections each of which is associated with one of the partial display areas, and

the processing section corrects the video signal for each of the partial display areas and sets the luminance of the associated partial light-emitting section based on the peak level and factor data.

15. The display device of claim 1, wherein

the peak level is a peak level of an image to be displayed on the display screen, and

the processing section uses the data map to set a position on the display screen where the peak level occurs as the reference position so as to acquire factor data associated with the reference position.

16. The display device of claim 1, wherein

the display device has a plurality of operation modes, and

the processing section determines which data map to refer to according to the operation mode.

17. The display device of claim 1, wherein

the processing section determines which data map to refer to according to content to be displayed.

18. A display device comprising:

a liquid crystal display section adapted to display an image based on a video signal;

a backlight; and

a processing section adapted to correct the video signal and set the luminance of the backlight based on two pieces of information, a peak level of the video signal in a display screen or in each of a plurality of partial display areas into which the display screen is divided, and a peak position, i.e., a position on the display screen where the peak level occurs.

19. A display device comprising:

a liquid crystal display section adapted to display an image based on a video signal;

a backlight having a plurality of partial light-emitting sections; and

a processing section adapted to correct the video signal and set the luminance of each of the partial light-emitting sections based on two pieces of information, a peak level of the video signal in a partial display area associated with one of the partial light-emitting sections, and a position of that partial display area.

20. A display method comprising:

correcting a video signal and setting the luminance of a backlight based on two pieces of information, a peak level of the video signal in a display screen or in each of a plurality of partial display areas into which the display screen is divided, and factor data obtained from a data map made up of a position on the display screen and the factor data that are associated with each other so as to display an image based on the corrected video signal.