US 11,727,863 B2
Display device which senses and compensates for degradation of a pixel and method of driving display device
Boyoung An, Hwaseong-si (KR); Ji-Woong Jeong, Hwaseong-si (KR); Wook Lee, Hwaseong-si (KR); and Jungki Min, Seongnam-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Apr. 28, 2022, as Appl. No. 17/732,375.
Claims priority of application No. 10-2021-0107252 (KR), filed on Aug. 13, 2021.
Prior Publication US 2023/0047875 A1, Feb. 16, 2023
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/043 (2013.01); G09G 2300/0842 (2013.01); G09G 2320/041 (2013.01); G09G 2320/045 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including pixels;
a controller configured to generate first compensation data based on first sensing data with respect to threshold voltages of driving transistors of the pixels which are sensed during a first sensing period after a power-off of the display device, to generate second compensation data based on second sensing data with respect to mobilities of the driving transistors of the pixels which are sensed during the first sensing period, to generate third compensation data based on third sensing data with respect to mobility change amounts of the driving transistors of the pixels which are sensed using image data for sensing compensated based on the first compensation data and the second compensation data during a second sensing period during an image display of the display device, and to compensate input image data based on the first compensation data, the second compensation data, and the third compensation data to generate compensated image data; and
a data driver configured to provide a data voltage to each of the pixels based on the compensated image data,
wherein:
the controller includes:
a first compensator configured to generate the first compensation data based on the first sensing data;
a second compensator configured to generate the second compensation data based on the second sensing data;
a third compensator configured to generate the third compensation data based on the third sensing data; and
an image data compensator configured to compensate the image data for sensing based on the first compensation data and the second compensation data, and to compensate the input image data based on the first compensation data, the second compensation data, and the third compensation data;
the third compensator includes:
a compensation target selector configured to select a compensation target;
a compensation data generator configured to generate the third compensation data based on the third sensing data and the compensation target; and
a compensation data controller configured to control the third compensation data based on a parameter; and
the compensation data controller is configured to multiply gains of the third compensation data by a panel parameter determined according to a size of the display panel.