US 12,274,130 B2
Light emitting display device ensuring uniform display quality in expanded display area
Hee Rim Song, Seoul (KR); Byung Chang Yu, Seosan-si (KR); and Gyung Soon Park, Seoul (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Jul. 31, 2023, as Appl. No. 18/228,078.
Application 18/228,078 is a continuation of application No. 17/588,734, filed on Jan. 31, 2022, granted, now 11,765,940.
Claims priority of application No. 10-2021-0072793 (KR), filed on Jun. 4, 2021.
Prior Publication US 2023/0413608 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G09G 3/3233 (2016.01); H10K 59/121 (2023.01); H10K 59/131 (2023.01)
CPC H10K 59/1216 (2023.02) [G09G 3/3233 (2013.01); G09G 2300/0408 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/0243 (2013.01); G09G 2310/08 (2013.01); H10K 59/131 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light emitting display device comprising:
a first display area including a first light-emitting element and a first pixel circuit unit which drives the first light-emitting element and overlaps the first light-emitting element; and
a second display area including a second light-emitting element and a second pixel circuit unit which drives the second light-emitting element and does not overlap the second light-emitting element,
wherein a pixel density in the first display area is greater than a pixel density in the second display area,
wherein each of the first pixel circuit unit and the second pixel circuit unit includes:
a first transistor which generates an output current, wherein the first transistor is a driving transistor;
a second transistor which receives a data voltage from a data line;
a third transistor which transmits the data voltage output from the second transistor to a gate electrode of the first transistor,
a fifth transistor which transmits a driving voltage to the first transistor; and
a sixth transistor which transmits the output current output from the first transistor to the first light-emitting element or the second light-emitting element, and
wherein the first pixel circuit unit further includes a first boost capacitor connected between a scan signal line and an electrode of the first transistor, and a second boost capacitor connected between the scan signal line and another electrode of the first transistor.