Display device, brightness adjustment device, method of adjusting brightness, and program

Patent metadata

Field	Value
Publication number	US-9294748-B2
Application number	US-201414254735-A
Country	US
Kind code	B2
Filing date	Apr 16, 2014
Priority date	Dec 11, 2008
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

Provided is a display device including a setting condition acquisition unit for obtaining various conditions for adjusting a gain of a video-signal, a current-brightness table calculation unit that calculates a table representing a relationship between an average brightness and a gain of a video-signal, and that calculates the table capable of setting a peak-brightness and power consumption of the video-signal independently, based on the various conditions acquired by the setting condition acquisition unit, a video-average brightness conversion block that calculates average-brightness of the video-signal input for each frame, a current-brightness control table that calculates a gain of the video-signal from the table based on the average-brightness calculated above, a video gain block that adjusts the video-signal using the gain calculated above, and a display panel that includes a plurality of pixels that emit light in response to a video-signal and displays a video based on the video-signal adjusted above.

First claim

The invention claimed is:

1. A display device, comprising:
circuitry configured to
acquire various conditions for adjusting a gain of a video signal;
calculate a table representing a relationship between an average brightness and the gain of the video signal, and calculate the table capable of setting a peak brightness and power consumption of the video signal independently, based on the various conditions;
calculate an average brightness of the video signal for each frame;
a calculate the gain of the video signal from the table based on the average brightness; and
adjust the video signal using the calculated gain; and

a display panel that includes a plurality of pixels that emit light in response to the video signal and displays a video based on the video signal adjusted by the circuitry.

2. The display device according to claim 1 , wherein the circuitry is configured to acquire the various conditions including environmental information indicating an environment surrounding the display device, user setting information set by a user, information on maximum power consumption that the display panel allows, or information on meta data indicating a category of the video.

3. The display device according to claim 1 , wherein the circuitry comprises
a memory which holds temporarily a frame by which the gain is multiplied.

4. The display device according to claim 1 , wherein the circuitry is further configured to:
calculate chromaticity of the video signal based on the various conditions; and
adjust the chromaticity of the video signal using the chromaticity calculated by the circuitry.

5. A brightness adjustment device, comprising:
circuitry configured to
acquire various conditions for adjusting a gain of a video signal;
calculate a table representing a relationship between an average brightness and the gain of the video signal, and calculate the table capable of setting a peak brightness and power consumption of the video signal independently, based on the various conditions;
calculate an average brightness of the video signal input for each frame;
calculate the gain of the video signal from the table based on the average; and
adjust the video signal using the calculated gain.

6. The brightness adjustment device according to claim 5 , wherein the circuitry is configured to acquire the various conditions including environmental information indicating an environment surrounding the display device, user setting information set by a user, information on maximum power consumption that a display panel allows, or information on meta data indicating a category of a video.

7. The brightness adjustment device according to claim 5 , wherein the circuitry comprises
a memory which holds temporarily a frame by which the gain is multiplied.

8. The brightness adjustment device according to claim 5 , wherein the circuitry is further configured to:
calculate chromaticity of the video signal based on the various conditions; and
adjust chromaticity of the video signal using the chromaticity calculated by the circuitry.

9. A method of adjusting brightness, comprising the steps of:
acquiring various conditions for adjusting a gain of a video signal;
calculating a table representing a relationship between an average brightness and the gain of the video signal, and calculating the table capable of setting a peak brightness and power consumption of the video signal independently, based on the various conditions;
calculating an average brightness of the video signal for each frame;
calculating the gain of a video signal from the table based on the calculated average brightness; and
adjusting the video signal using the calculated gain.

10. A non-transitory computer-readable medium storing instructions that, when executed on a computer, cause the computer to execute the steps of:
acquiring various conditions for adjusting a gain of a video signal;
calculating a table representing a relationship between an average brightness and the gain of the video signal, and calculating the table capable of setting a peak brightness and power consumption of the video signal independently, based on the various conditions;
calculating an average brightness of the video signal input for each frame;
calculating the gain of the video signal from the table based on the calculated average brightness; and
adjusting the video signal using the calculated gain.

Assignees

• Joled Inc

Inventors

• Mori Hideto

Classifications

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• H04N9/68 Primary

  for controlling the amplitude of colour signals, e.g. automatic chroma control circuits (H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86) · CPC title

• G09G2320/0646

  Modulation of illumination source brightness and image signal correlated to each other · CPC title

• G09G2320/062

  Adjustment of illumination source parameters · CPC title

• G09G2320/041

  Temperature compensation · CPC title