US 11,961,468 B2
Multi-pixel collective adjustment for steady state tracking of parameters
Gaurav Malhotra, Cupertino, CA (US); Anup Jose, San Jose, CA (US); and Amir Amirkhany, Sunnyvale, CA (US)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Feb. 23, 2021, as Appl. No. 17/183,061.
Claims priority of provisional application 63/081,700, filed on Sep. 22, 2020.
Prior Publication US 2022/0093041 A1, Mar. 24, 2022
Int. Cl. G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2320/029 (2013.01); G09G 2320/045 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for compensating for transistor aging in a display device, comprising:
identifying Z pixels from among a plurality of pixels that are included in a first group of a plurality of groups, wherein Z>1;
sensing, for each pixel in a subset of pixels in the first group, a pixel current output to the pixel, the subset including M pixels, wherein 1≤M≤Z;
determining an ErrorM using the sensed pixel current for the M pixels and a predefined reference current; and
adjusting, for each pixel of the Z pixels, an input voltage for a transistor of the pixel using the ErrorM,
wherein ErrorM=ΣMsign(ErrorM), m being one pixel of the M pixels, and Errorm being an error of the one pixel based on the sensed pixel current of the one pixel and the reference current.