US 12,069,899 B2
Display apparatus having a bank on a pixel defining layer
Hyeongpil Kim, Yongin-si (KR); and Byounghun Sung, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jun. 22, 2021, as Appl. No. 17/354,404.
Claims priority of application No. 10-2020-0170748 (KR), filed on Dec. 8, 2020.
Prior Publication US 2022/0181410 A1, Jun. 9, 2022
Int. Cl. H10K 59/122 (2023.01); H10K 50/13 (2023.01); H10K 59/38 (2023.01)
CPC H10K 59/122 (2023.02) [H10K 59/38 (2023.02); H10K 50/13 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A display apparatus comprising:
a lower substrate;
a first pixel electrode, a second pixel electrode, and a third pixel electrode that are disposed apart from each other on the lower substrate;
a pixel defining layer overlapping an edge of each of the first pixel electrode, the second pixel electrode, and the third pixel electrode, the pixel defining layer comprising:
a first opening exposing a center portion of the first pixel electrode;
a second opening exposing a center portion of the second pixel electrode; and
a third opening exposing a center portion of the third pixel electrode;
a bank disposed on the pixel defining layer and isolating the first opening from the second opening and the third opening;
a first emission layer overlapping the first pixel electrode in view of a direction perpendicular to the lower substrate, the first emission layer emitting light of a wavelength belonging to a first wavelength band;
a second emission layer overlapping the second pixel electrode and the third pixel electrode in view of the direction perpendicular to the lower substrate, the second emission layer being disposed apart from the first emission layer, and emitting light of a wavelength belonging to a second wavelength band;
an upper substrate disposed on the lower substrate such that the first pixel electrode, the second pixel electrode, and the third pixel electrode are disposed between the upper substrate and the lower substrate; and
a first quantum dot layer disposed on a lower surface of the upper substrate toward the lower substrate, and overlapping the third pixel electrode in view of a direction perpendicular to the upper substrate, the first quantum dot layer converting light having a wavelength belonging to the second wavelength band into light of a wavelength belonging to a third wavelength band.