US 11,915,668 B2
Display device having uniform luminance, and driving method thereof
Eun Jin Choi, Yongin-si (KR); Ki Hyun Pyun, Yongin-si (KR); and Sung In Kang, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on May 9, 2022, as Appl. No. 17/739,619.
Application 17/739,619 is a continuation of application No. 17/016,988, filed on Sep. 10, 2020, granted, now 11,341,932.
Claims priority of application No. 10-2019-0176611 (KR), filed on Dec. 27, 2019.
Prior Publication US 2022/0262327 A1, Aug. 18, 2022
Int. Cl. G09G 5/10 (2006.01); G09G 3/20 (2006.01)
CPC G09G 5/10 (2013.01) [G09G 3/2007 (2013.01); G09G 2310/027 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0686 (2013.01); G09G 2330/023 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel including a plurality of unit blocks disposed in a display area;
a display panel driver configured to generate a data signal based on input image data; and
a zone compensator configured to calculate load values of the input image data for the unit blocks, respectively, to extract a reference block with a largest load value among the unit blocks, and to control luminance of the unit blocks based on the reference block and the load values,
wherein the zone compensator generates corrected image data by correcting the input image data based on the reference block and the load values, and the display panel driver generates the data signal based on the corrected image data,
wherein the zone compensator generates the corrected image data by applying a gain curve to the input image data, the gain curve includes gain values corresponding to spatial locations in the display area, and as a gain value of the gain curve decreases, luminance of the corresponding spatial location in the display area decreases, and
wherein the gain curve is generated based on a first sub-luminance gain curve corresponding to a distance from a center of the reference block in a first direction and a second sub-luminance gain curve corresponding to the distance from the center of the reference block in a second direction crossing the first direction.