US 12,009,468 B2
Unit pixel having light emitting device, pixel module and displaying apparatus
Seung Sik Hong, Ansan-si (KR)
Assigned to Seoul Semiconductor Co., Ltd., Ansan-si (KR)
Filed by Seoul Semiconductor Co., Ltd., Ansan-si (KR)
Filed on Jul. 5, 2023, as Appl. No. 18/347,165.
Application 18/347,165 is a continuation of application No. 17/833,734, filed on Jun. 6, 2022, granted, now 11,742,472.
Application 17/833,734 is a continuation of application No. 16/831,973, filed on Mar. 27, 2020, granted, now 11,355,686, issued on Jun. 7, 2022.
Claims priority of provisional application 62/826,033, filed on Mar. 29, 2019.
Prior Publication US 2023/0352646 A1, Nov. 2, 2023
Int. Cl. H01L 33/62 (2010.01); H01L 25/075 (2006.01); H01L 33/58 (2010.01)
CPC H01L 33/62 (2013.01) [H01L 25/0753 (2013.01); H01L 33/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display apparatus, comprising:
a panel substrate; and
a pixel module disposed on the panel substrate, the pixel module including:
a circuit board, and
a plurality of unit pixels disposed on the circuit board, wherein:
each of the unit pixels includes a plurality of light emitting devices longitudinally extending along a first direction and arranged on the circuit board,
each of the light emitting devices comprises:
a substrate;
a light emitting layer including a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer interposed between the first and second conductivity type semiconductor layers;
a first connection layer electrically connected to the first conductivity type semiconductor layer;
a second connection layer electrically connected to the second conductivity type semiconductor layer; and
a step adjustment layer disposed between the circuit board and the light emitting layer and covering a portion of the light emitting device, and
the light emitting devices in the unit pixels are arranged and aligned in a second direction crossing the first direction.