Self-luminous display device, control method of self-luminous display device, and computer program

Patent metadata

Field	Value
Publication number	US-9336705-B2
Application number	US-201314135032-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 26, 2012
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Provided is a self-luminous display device including a data calculation section configured to calculate, by using a supplied video signal, data relating to a luminance amount accumulated in a unit of a first block in a target region for luminance control in a screen on which a plurality of pixels are arranged in a matrix, each of the pixels including a light emitting element which emits light by itself according to a current amount, a resampling section configured to resample the data relating to the luminance amount in the target region, in a unit of a second block, the data relating to the luminance amount being calculated by the data calculation section, the second block being larger than the first block, and a scaling section configured to generate data for luminance control in the target region by scaling the data resampled by the resampling section.

First claim

What is claimed is:

1. A display device comprising:
a screen on which a plurality of pixels are arranged in a matrix, each pixel of the plurality of pixels including a light emitting element which emits light in accordance with a current amount; and
a display controller that generates a luminance map, wherein the display controller is configured to:
generate, based on luminance data from a video signal, data relating to a luminance amount accumulated in a unit of a first block in a target region for luminance control in the screen on which the plurality of pixels are arranged,
sample the data relating to the luminance amount in the target region in a unit of a second block, wherein the second block is larger than the first block, and
generate data for luminance control in the target region by scaling the data sampled in the unit of the first block.

2. The display device according to claim 1 , wherein the display controller is configured to search for a maximum value in the second block and a block surrounding the second block.

3. The display device according to claim 1 , wherein the display controller is configured to generate a gain for the target region by using the data for luminance control, wherein the generated gain cancels a gain applied to a high luminance side of the video signal.

4. The display device according to claim 1 , wherein the display controller is configured to generate a gain for the target region by using the data for luminance control, wherein the generated gain reduces a luminance of a high luminance side of the video signal.

5. The display device according to claim 1 , wherein the display controller is configured to control a conversion ratio for the target region when generating a video signal to be supplied to a white pixel from video signals of red, green and blue by using the data for luminance control.

6. The display device according to claim 1 , wherein the display controller is configured to generate a gain applied to the video signal by using data relating to the luminance amount calculated for a partial region of the screen.

7. The display device according to claim 1 , wherein the display controller is configured to detect a maximum value of the data relating to the luminance amount at only a prescribed region of a periphery of the screen for the data relating to the luminance amount.

8. The display device according to claim 7 , wherein the display controller is configured to generate a gain applied to the prescribed region by using information of the maximum value detected at the prescribed region of the periphery of the screen.

9. The display device according to claim 1 wherein the display controller is configured to generate the data relating to the luminance amount in a case where the video signal is equal to or more than a prescribed luminance, and determine whether or not a maximum value of a luminance of a white color generated from video signals of red, green and blue, and a maximum value of a luminance of a monochromic color, are equal to or more than a prescribed luminance.

10. A display device comprising:
a screen on which a plurality of pixels are arranged in a matrix, each pixel of the plurality of pixels including a light emitting element which emits light in accordance with a current amount; and
a display controller that generates a luminance map, wherein the display controller is configured to:
generate data relating to a luminance amount accumulated in a unit of a first block in a target region for luminance control in the screen on which a plurality of pixels are arranged in a matrix and an image is displayed with a red pixel, a green pixel, a blue pixel, and a white pixel, and
process a video signal supplied to the screen based on a peak of the data relating to the luminance amount, and
generate a gain for the target region by using the data relating to the luminance amount, wherein the generated gain cancels a gain applied to a high luminance side of the video signal.

11. The display device according to claim 10 , wherein the display controller is configured to control a conversion ratio for the target region when generating a video signal to be supplied to a white pixel from video signals of red, green and blue by using the data relating to the luminance amount.

12. The display device according to claim 10 , wherein the display controller is configured to use data for luminance control on a portion of the screen which is generated from the data relating to the luminance amount in the target region.

13. The display device according to claim 10 , wherein the display controller is configured to generate a second gain for the target region by using the data relating to the luminance amount, wherein the second gain uniformly controls a luminance of a whole of the screen.

14. The display device according to claim 10 , wherein the display controller is configured to utilize a peak of the data relating to the luminance amount detected at only a prescribed region of a periphery of the screen.

15. The display device according to claim 14 , wherein the display controller is configured to control a second gain applied to the prescribed region.

16. The display device according to claim 15 , wherein the display controller is configured to generate a second gain for the target region by using the data relating to the luminance amount, wherein the gain uniformly controls a luminance of a whole of the target region.

17. A display device comprising:
a display panel; and
a display controller, wherein the display controller is configured to:
generate, based on luminance data from a video signal, data relating to a luminance amount accumulated in a unit of a first block in a target region for luminance control in the display panel on which a plurality of pixels are arranged in a matrix, each pixel of the plurality of pixels including a light emitting element which emits light in accordance with a current amount,
sample the data relating to the luminance amount in the target region in a unit of a second block, wherein the second block is larger than the first block,
generate data for luminance control in the target region by scaling the sampled data in the unit of the first block, and
modify luminance data of the video signal based on the scaled data.

18. The display device according to claim 17 , wherein the display controller is configured to search for a maximum value in the second block and a block surrounding the second block.

19. The display device according to claim 17 , wherein the display controller is configured to generate a gain for the target region by using the data for luminance control, wherein the generated gain cancels a gain applied to a high luminance side of the video signal.

20. The display device according to claim 17 , wherein the display controller is configured to generate a gain for the target region by using the data for luminance control, wherein the generated gain reduces a luminance of a high luminance side of the video signal.

Assignees

• Sony Corp
• Joled Inc

Inventors

• Inoue Yasuo
• Funatsu Yohei
• Shimizu Hidehisa
• Uchida Takashi

Classifications

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G2340/06

  Colour space transformation · CPC title

• G09G2320/029

  by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title