US 12,250,840 B2
Unit pixel for red-green-cyan-blue (RGCB) micro-display having vertically stacked sub-pixels
James Chinmo Kim, Mountain View, CA (US); and Sungsoo Yi, Sunnyvale, CA (US)
Assigned to SUNDIODE KOREA, (KR)
Filed by SUNDIODE KOREA, Seoul (KR)
Filed on Apr. 15, 2022, as Appl. No. 17/722,198.
Claims priority of application No. 10-2022-0010598 (KR), filed on Jan. 25, 2022.
Prior Publication US 2023/0238481 A1, Jul. 27, 2023
Int. Cl. H10H 20/816 (2025.01); H10H 20/812 (2025.01); H10H 20/831 (2025.01); H10H 20/857 (2025.01)
CPC H10H 20/8162 (2025.01) [H10H 20/812 (2025.01); H10H 20/831 (2025.01); H10H 20/857 (2025.01)] 19 Claims
OG exemplary drawing
 
1. A unit pixel of a Red-Green-Cyan-Blue (RGCB) microdisplay comprising:
a first n-type contact layer formed on a growth substrate;
a second n-type contact layer formed on the first n-type contact layer;
a first sub-pixel formed on the second n-type contact layer;
a second sub-pixel formed on the first sub-pixel;
a first common electrode layer formed between the first sub-pixel and the second sub-pixel;
a third sub-pixel formed on the second sub-pixel; and
a fourth sub-pixel formed on the third sub-pixel,
wherein the first sub-pixel and the second sub-pixel are connected to the second n-type contact layer, and
the third sub-pixel and the fourth sub-pixel are connected to the first n-type contact layer.