Display device, display method, recording medium, and television receiver

Patent metadata

Field	Value
Publication number	US-2018247581-A1
Application number	US-201615752601-A
Country	US
Kind code	A1
Filing date	Dec 27, 2016
Priority date	Jan 18, 2016
Publication date	Aug 30, 2018
Grant date	—

Abstract

A technique of displaying an image at adequate luminance with a configuration simpler than a configuration in related art is disclosed. A display device (1) includes a display unit (40) that is configured such that luminance of an image to be displayed is adjustable on a per area basis of multiple areas, an image processing unit (32) that generates an output image by modifying a signal level of an input image in a current frame by referencing process information concerning a preceding frame generated by a process information generation unit (34) in the preceding frame, and a display control unit (36) that determines maximum luminance, adjusts luminance on a per area basis of the multiple areas, and displays the output image at the adjusted luminance.

First claim

1 . A display device comprising a display unit, an image processing unit, a device control unit, and a process information generation unit,
wherein the display unit is partitioned into a plurality of areas, and is configured such that luminance of an image to be displayed is adjustable on a per area basis of the areas, wherein the image processing unit generates an output image by modifying a signal level of an input image, wherein the display control unit determines outputtable maximum luminance in response to the output image, adjusts luminance on a per area basis of the areas in response to the output image and the maximum luminance, and displays the output image on the display unit at the adjusted luminance, wherein the process information generation unit generates process information responsive to the maximum luminance and luminance at which the display unit is enabled to display, and wherein the image processing unit generates the output image by modifying the signal level of the input image in a current frame by referencing the process information concerning a preceding frame generated by the process information generation unit in the preceding frame.

2 . The display device according to claim 1 , further comprising a luminance oscillation restricting unit that selects, as the process information that the image processing unit references to generate the output image, the process information concerning the current frame or the process information concerning the preceding frame.

3 . The display device according to claim 1 ,
wherein the display unit comprises a backlight that is enabled to adjust the luminance on a per area basis of the areas, and wherein the display control unit adjusts the luminance on a per area basis of the areas by controlling the backlight.

4 . A display method of displaying an image on a display device including a display unit, comprising an image processing step, a display control step, and a process information generation step,
wherein the display unit is partitioned into a plurality of areas, and is configured such that luminance of an image to be displayed is adjustable on a per area basis of the areas, wherein the image processing step includes generating an output image by modifying a signal level of an input image, wherein the display control step includes determining outputtable maximum luminance in response to the output image, adjusting luminance on a per area basis of the areas in response to the output image and the maximum luminance, and displaying the output image on the display unit at the adjusted luminance, wherein the process information generation step includes generating process information responsive to the maximum luminance and luminance at which the display unit is enabled to display, and wherein the image processing step includes generating the output image by modifying the signal level of the input image in a current frame by referencing the process information concerning a preceding frame generated in the process information generation step in the preceding frame.

5 . (canceled)

6 . A non-transitory computer readable recording medium having recorded a control program causing a computer to operate the display device according to claim 1 , the control program causing the computer to perform as the image processing unit and the display control unit.

7 . A television receiver comprising the display device according to claim 1 .

Assignees

• Sharp Kk

Inventors

• Sakurai Ryoji
• Taniguchi Shigeki

Classifications

• G09G2360/16

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

• G09G2320/0271

  Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G3/34

  by control of light from an independent source · CPC title