US 12,424,148 B2
Luminance compensation method of display device by adjusting initialization control signal and display device
Seongoh Yeom, Yongin-si (KR); Yu-Chol Kim, Yongin-si (KR); Jihye Kim, Yongin-si (KR); Jin-Wook Yang, Yongin-si (KR); Eui-Myeong Cho, Yongin-si (KR); and Jakyoung Jin, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Oct. 25, 2023, as Appl. No. 18/493,977.
Claims priority of application No. 10-2023-0011520 (KR), filed on Jan. 30, 2023.
Prior Publication US 2024/0257720 A1, Aug. 1, 2024
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0247 (2013.01); G09G 2360/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for compensating for luminance of a display device including a light emitting element and a pixel driving circuit connected to the light emitting element and configured to receive an initialization control signal, the method comprising:
measuring a first luminance for a reference grayscale at a first operating frequency;
measuring a second luminance for the reference grayscale at a second operating frequency, wherein the second operating frequency is different from the first operating frequency;
calculating a first reference value based on the first luminance and the second luminance;
comparing the first reference value and a threshold value to output a first comparison result,
changing a first duty ratio of the initialization control signal into a second duty ratio depending on the first comparison result;
after the first duty ratio is changed into the second duty ratio, measuring a third luminance for the reference grayscale at the second operating frequency;
calculating a second reference value based on the first luminance and the third luminance;
comparing the second reference value with the threshold value to output a second comparison result; and
calculating a final duty ratio corresponding to the threshold value using the first duty ratio and the second duty ratio responsive to the second comparison result.