US 11,941,790 B2
Image data processing apparatus and display device for controlling local dimming
Pil Jae Min, Daejeon (KR); and Kwon Chung, Daejeon (KR)
Assigned to SILICON WORKS CO., LTD., Daejeon (KR)
Filed by SILICON WORKS CO., LTD., Daejeon (KR)
Filed on Feb. 24, 2023, as Appl. No. 18/174,133.
Application 18/174,133 is a continuation of application No. 16/950,543, filed on Nov. 17, 2020, granted, now 11,593,923.
Claims priority of application No. 10-2019-0173108 (KR), filed on Dec. 23, 2019.
Prior Publication US 2023/0222633 A1, Jul. 13, 2023
Int. Cl. G06T 5/00 (2006.01); G06F 1/03 (2006.01); G06T 5/40 (2006.01); G09G 5/00 (2006.01); G09G 5/22 (2006.01)
CPC G06T 5/009 (2013.01) [G06F 1/03 (2013.01); G06T 5/40 (2013.01); G09G 5/003 (2013.01); G09G 5/22 (2013.01); G06T 2207/10016 (2013.01); G06T 2207/20021 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0238 (2013.01); G09G 2320/0626 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An image data processing device comprising:
a representative-brightness value calculating circuit configured to analyze original image data of a video image divided into a plurality of blocks and to calculate a representative brightness value for a block of the plurality of blocks; and
a black-image data analyzing circuit configured to generate a first modified representative brightness value based on a gamma variable and a ratio related to the black image data using an amount of black image data included in the block and the calculated representative brightness value, wherein
the first modified representative brightness value is smaller when the gamma variable is less than 1 as compared to when the gamma variable is greater than 1.