US 11,854,450 B2
Display device performing image sticking compensation based on accumulated degradation amount, and method of compensating image sticking in a display device
Jongman Kim, Seoul (KR); and Hyungkeun Park, Incheon (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Jul. 20, 2021, as Appl. No. 17/380,431.
Claims priority of application No. 10-2020-0090210 (KR), filed on Jul. 21, 2020.
Prior Publication US 2022/0028319 A1, Jan. 27, 2022
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/20 (2013.01) [G09G 2300/0842 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0275 (2013.01); G09G 2320/0257 (2013.01); G09G 2320/046 (2013.01); G09G 2320/048 (2013.01); G09G 2360/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of pixels;
a data driver configured to provide data signals to the plurality of pixels;
a scan driver configured to provide scan signals to the plurality of pixels; and
a controller configured to control the data driver and the scan driver, and including a volatile age memory configured to store first accumulated degradation amounts for the plurality of pixels calculated by accumulating current degradation amounts based on input image data in a first frame and to store second accumulated degradation amounts for the plurality of pixels and an internal age memory configured to store backup accumulated degradation amounts generated based on the first accumulated degradation amounts,
wherein the accumulated degradation amounts are calculated in units of a first pixel block,
wherein the backup accumulated degradation amounts are calculated in units of a second pixel block,
wherein a size of the second pixel block is greater than a size of the first pixel block,
wherein the controller is further configured to compare the second accumulated degradation amounts of the volatile age memory and the first accumulated degradation amounts calculated by accumulating the current degradation amounts, and
wherein the controller is further configured to compensate the input image data in a second frame by selectively using the second accumulated degradation amounts of the volatile age memory or the backup accumulated degradation amounts of the internal age memory according to a result of the comparing.