US 11,770,944 B2
Light emitting display device with an optical compensation layer
Ji Na Jeon, Seoul (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Apr. 21, 2021, as Appl. No. 17/236,944.
Claims priority of application No. 10-2020-0183654 (KR), filed on Dec. 24, 2020.
Prior Publication US 2022/0209172 A1, Jun. 30, 2022
Int. Cl. H10K 50/818 (2023.01); H10K 50/18 (2023.01); H10K 59/12 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/818 (2023.02) [H10K 50/18 (2023.02); H10K 59/12 (2023.02); H10K 2102/351 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light emitting display device comprising:
a substrate comprising first subpixels and second subpixels;
a plurality of thin film transistors including a first thin film transistor and a second thin film transistor;
a first transparent electrode and a second transparent electrode at the first subpixels and the second subpixels, respectively;
a first reflective electrode on the first transparent electrode and connected to the first thin film transistor via the first transparent electrode, and a second reflective electrode on the second transparent electrode and connected to the second thin film transistor via the second transparent electrode;
a first optical compensation layer on the first reflective electrode;
a first anode to contact the first optical compensation layer, the first optical compensation layer between the first anode and the first reflective electrode;
a second anode to contact the second reflective electrode;
a first unit having at least one first stack comprising a first common layer, a first emission layer to emit light with a first wavelength, and a second common layer, which are sequentially stacked on the first anode;
a second unit having at least one second stack comprising the first common layer, a second emission layer to emit light with a second wavelength that is less than the first wavelength, and the second common layer, which are sequentially stacked on the second anode; and
a cathode on the first unit and the second unit.