US 12,245,469 B2
Display device having improved light emission efficiency
Beom Joon Kim, Seoul (KR); Hyo Min Ko, Suwon-si (KR); Sang Gyun Kim, Hwaseong-si (KR); and Bo Ra Lee, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Aug. 18, 2021, as Appl. No. 17/406,068.
Claims priority of application No. 10-2020-0110971 (KR), filed on Sep. 1, 2020.
Prior Publication US 2022/0069043 A1, Mar. 3, 2022
Int. Cl. H10K 59/124 (2023.01); H10K 59/122 (2023.01); H10K 59/123 (2023.01); H10K 59/12 (2023.01)
CPC H10K 59/124 (2023.02) [H10K 59/122 (2023.02); H10K 59/123 (2023.02); H10K 59/1201 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a plurality of pixels, each of the pixels comprising:
a first substrate on which a thin film transistor is disposed;
a planarization layer disposed on the first substrate, wherein the planarization layer includes a plurality of protrusions;
a first electrode disposed on the planarization layer;
a pixel defining layer disposed on the first electrode, wherein the pixel defining layer includes a plurality of insulating patterns corresponding to the protrusions;
a light emitting layer disposed on the first electrode and the pixel defining layer; and
a second electrode disposed on the light emitting layer,
wherein the first electrode overlaps the protrusions in a plan view,
wherein an entirety of the plurality of insulating patterns overlaps the light emitting layer, and
wherein each of the plurality of insulating patterns overlaps only one of the first electrodes.