US 12,094,428 B2
Display apparatus that controls amount of light from light source in accordance with video signal, and control method therefor
Mitsuru Tada, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Oct. 13, 2021, as Appl. No. 17/500,319.
Claims priority of application No. 2020-177597 (JP), filed on Oct. 22, 2020.
Prior Publication US 2022/0130340 A1, Apr. 28, 2022
Int. Cl. G09G 3/34 (2006.01); G09G 3/36 (2006.01)
CPC G09G 3/342 (2013.01) [G09G 3/3406 (2013.01); G09G 3/3426 (2013.01); G09G 3/36 (2013.01); G09G 3/3607 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/064 (2013.01); G09G 2320/0646 (2013.01); G09G 2360/12 (2013.01); G09G 2360/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus that displays a video in accordance with an input signal, the apparatus comprising:
a backlight including a plurality of light sources;
a panel configured to display the video by modulating light from the backlight;
at least one processor; and
at least one memory coupled to the at least one processor, the at least one memory having instructions that, when executed by the at least one processor, perform operations as:
a determination section configured to determine an amount of light of each of the plurality of light sources subframe by subframe, a subframe period being shorter than one frame period;
a controller configured to control the plurality of light sources in accordance with the determined amounts of light subframe by subframe;
an acquisition section configured to acquire statistics in a plurality of areas subframe by subframe in accordance with the input signal, the statistics being an average luminance value for each of a plurality of areas for a signal of the video and a maximum luminance value for each of the plurality of areas; and
a statistic update section configured to update a number of the average luminance value each corresponding to the plurality of areas for the signal of the video,
wherein the amount of light of each of the plurality of light sources is determined subframe by subframe in accordance with the statistics.