DISPLAY DEVICE AND DISPLAY METHOD

• US 20150379943A1
• Filed: 09/03/2015
• Published: 12/31/2015
• 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 9,583,052 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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. (canceled)

2. A display device comprising:

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

a backlight having a plurality of partial light-emitting sections each having a respective light source so as to enable each of the partial lighting emitting sections to emit light independently of each other; and

a processing section configured to correct the video signal for each partial display area into which the display screen is divided and set luminance of each of the partial light-emitting sections based on a peak level and factor data, in which the partial light-emitting sections are associated respectively with the partial display areas,

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

wherein the processing section is configured to obtain a respective peak level for each of the partial display areas by determining which unit area of respective plurality of unit areas into which each of the partial display areas is divided has a maximum value of the video signal, assigning the determined maximum value as the peak level of the respective partial display area and assigning the respective unit area having the maximum value as a respective reference position.

3. The display device of claim 2,

wherein the processing section is configured to calculate a corrected peak level for each of the partial display areas by use of the respective peak value for said partial display area and respective factor data which is only associated with the respective reference position even when the respective unit areas of the respective partial display area have different values of factor data, such that the factor data associated with each position of a unit area which is a non-reference position is not utilized.

4. The display device of claim 3, wherein

the processing section is configured to set for each of the partial lighting emitting sections a luminance level according to the corrected peak level of the partial display area corresponding to the partial lighting emitting section.

5. The display device of claim 2, wherein

the processing section is configured 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 each of the plurality of partial display areas, 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.

6. The display device of claim 5 further comprising:

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

7. The display device of claim 5, wherein:

the display device has a plurality of operation modes and the data map is changeable in accordance with a respective operation mode, and

the processing section is configured to determine changes for the data map according to the operation mode.

8. The display device of claim 5, wherein

the data map is changeable and the processing section is configured to determine changes to the data map according to content to be displayed.

9. The display device of claim 5, wherein

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

10. The display device of claim 9, wherein

when 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 when the reference position belongs to other factor data area.

11. The display device of claim 10, wherein

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

12. A display method comprising:

correcting a video signal for each partial display area into which a display screen is divided and setting luminance of each of a plurality of partial light-emitting section of a backlight, based on a peak level and factor data,

wherein the partial light-emitting sections have respective light sources so as to enable each of the partial lighting emitting sections to emit light independently of each other, and the partial light-emitting sections are associated respectively with the partial display areas, and

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

obtaining a respective peak level for each of the partial display areas by determining which unit area of respective plurality of unit areas into which each of the partial display areas is divided has a maximum value of the video signal, assigning the determined maximum value as the peak level of the respective partial display area and assigning the respective unit area having the maximum value as a respective reference position.