US 12,354,519 B2
Display device and method of controlling an on-bias stress (OBS) period
Jae Hyoung Kim, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Jul. 25, 2023, as Appl. No. 18/225,926.
Claims priority of application No. 10-2022-0181784 (KR), filed on Dec. 22, 2022.
Prior Publication US 2024/0212565 A1, Jun. 27, 2024
Int. Cl. G09G 3/20 (2006.01); G09G 3/3233 (2016.01); G09G 3/3266 (2016.01)
CPC G09G 3/2092 (2013.01) [G09G 3/3233 (2013.01); G09G 3/3266 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0262 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/045 (2013.01); G09G 2330/021 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of subpixels, each of the subpixels including a light-emitting element;
a data driver configured to supply a data voltage and an on-bias stress (OBS) voltage to each of the subpixels;
a scan driver configured to output an emission signal for controlling a non-emission period and an emission period of the light-emitting element and an OBS signal for controlling an OBS period; and
a controller,
wherein the controller controls the data driver to supply the data voltage to each of the subpixels in the emission period to emit light and to supply the OBS voltage to each of the subpixels in the non-emission period during a first frame period,
the controller controls the data driver to supply the OBS voltage to each of the subpixels in the non-emission period and maintains the data voltage supplied in the first frame period in the emission period to emit light during a second frame period, and
the controller controls the scan driver to set an OBS period performed in the non-emission period of the second frame period to be twice or more longer than an OBS period performed nearest to the last emission period of the first frame period,
wherein a sum of the OBS period performed nearest to the last emission period of the first frame period and the OBS period performed in the non-emission period of the second frame period is constant, and
wherein, as a difference between a luminance in the first frame period and a luminance in the second frame period increases, a proportion of the OBS period performed nearest to the last emission period of the first frame period decreases, and the OBS period performed in the non-emission period of the second frame period increases.