US 11,837,141 B2
Display driving apparatus having Mura compensation function and method of compensating for Mura of the same
Jun Young Park, Daejeon (KR); Min Ji Lee, Daejeon (KR); Gang Won Lee, Daejeon (KR); Young Kyun Kim, Daejeon (KR); Ji Won Lee, Daejeon (KR); Jung Hyun Kim, Daejeon (KR); Suk Ju Kang, Daejeon (KR); and Sung In Cho, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Oct. 12, 2022, as Appl. No. 17/964,678.
Claims priority of application No. 10-2021-0136445 (KR), filed on Oct. 14, 2021.
Prior Publication US 2023/0118591 A1, Apr. 20, 2023
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 2320/0233 (2013.01); G09G 2360/16 (2013.01)] 10 Claims
OG exemplary drawing
 
6. A mura compensation method of a display driving apparatus, comprising:
a first step of performing first extrapolation for calculating a first estimation difference value of a first estimation gray level higher than selected gray levels by using known difference values of the selected gray levels;
a second step of performing second extrapolation for calculating a second estimation difference value of a second estimation gray level lower than the selected gray levels by using the known difference values of the selected gray levels; and
a third step of generating, as compensation data, coefficient values of a mura compensation equation which has been fit to have a curve that satisfies the known difference values of the selected gray levels, the first estimation difference value, and the second estimation difference value,
wherein the compensation data comprises the coefficient values of the mura compensation equation in which all of the known difference values of the selected gray levels, the first estimation difference value, and the second estimation difference value have a difference within a preset error range.