US 12,112,714 B2
Circuit device and display system
Yasutoshi Akiba, Chino (JP); Kumar Anandabairavasamy Anand, Richmond (CA); Sebdani Mahmood Mazrouei, Markham (CA); and Tyler Dahlman, Richmond (CA)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jul. 10, 2023, as Appl. No. 18/349,747.
Claims priority of application No. 2022-111037 (JP), filed on Jul. 11, 2022.
Prior Publication US 2024/0013739 A1, Jan. 11, 2024
Int. Cl. G09G 3/34 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 2310/08 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0646 (2013.01); G09G 2360/16 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A circuit device that executes local dimming control on a display device including a display panel and a backlight having a plurality of two-dimensionally arranged light source elements, the circuit device comprising:
a luminance analysis circuit configured to execute luminance analysis on image data and obtain dimming information for the local dimming control based on a result of the luminance analysis;
a luminance information calculation circuit configured to calculate, based on the dimming information on n×m light source elements arranged around a target pixel for color correction in the local dimming control among the plurality of light source elements, each of n and m being an integer of two or more and eight or less, luminance information indicating a luminance of light reaching the target pixel from the n×m light source elements; and
a color correction circuit configured to execute color correction on image data on the target pixel based on the luminance information and output the image data after the color correction to the display device,
wherein the luminance information calculation circuit calculates the luminance information based on an attenuation characteristic of light reaching the display panel from each of the n×m light source elements and distance information on a distance between each of the light source elements and the target pixel, and
the attenuation characteristic is a non-attenuation characteristic in a predetermined distance range from a position of the light source element.