US 12,224,305 B2
LED display apparatus including partition and gap-fill layer
Jihye Yeon, Hwaseong-si (KR); Hankyu Seong, Seoul (KR); Sunghyun Sim, Uiwang-si (KR); and Junbu Youn, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jan. 29, 2021, as Appl. No. 17/162,590.
Claims priority of application No. 10-2020-0061000 (KR), filed on May 21, 2020.
Prior Publication US 2021/0366981 A1, Nov. 25, 2021
Int. Cl. H10K 59/122 (2023.01); H01L 27/15 (2006.01); H01L 33/38 (2010.01); H01L 33/50 (2010.01); H01L 33/60 (2010.01); H01L 33/62 (2010.01); H10K 59/35 (2023.01)
CPC H01L 27/156 (2013.01) [H01L 33/382 (2013.01); H01L 33/502 (2013.01); H01L 33/60 (2013.01); H01L 33/62 (2013.01); H10K 59/122 (2023.02); H10K 59/35 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A display device, comprising:
a circuit substrate including a driving circuit;
an LED cell array disposed on the circuit substrate, and including a plurality of LED modules, each of the plurality of LED modules including at least two LED cells, from among a plurality of LED cells of the LED cell array, and an insulator coupling the at least two LED cells to each other;
a gap-fill layer filling a gap between the plurality of LED modules and not disposed between the at least two LED cells of each of the plurality of LED modules;
a partition disposed on the LED cell array, and defining a plurality of light emitting windows disposed in regions corresponding to the plurality of LED cells, respectively; and
at least one color conversion layer disposed in at least a portion of the plurality of light emitting windows,
wherein each LED cell of the plurality of LED cells includes an active layer, a first conductivity-type semiconductor layer on a first side of the active layer of the LED cell that is towards the partition, and a second conductivity-type semiconductor layer that is on a second side of the active layer of the LED cell that is towards the circuit substrate,
wherein each LED cell of the plurality of LED cells further includes a first electrode and a second electrode that are configured to connect the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, respectively, to the driving circuit,
wherein each LED cell of the plurality of LED cells comprises a semiconductor stack that comprises the active layer, the first conductivity-type semiconductor layer, and the second conductivity-type semiconductor layer,
wherein a side portion of a top surface of the semiconductor stack is in direct contact with a bottom surface of the partition,
wherein a center portion of the top surface of the semiconductor stack is exposed from the partition such that the center portion directly faces towards a light emitting window from among the plurality of light emitting windows, without the partition being between the center portion and the light emitting window,
wherein a distance, between the plurality of light emitting windows disposed in each of the plurality of LED modules, is the same as a distance between adjacent ones of the plurality of light emitting windows that are from adjacent LED modules from among the plurality of LED modules,
wherein a first portion of the gap-fill layer disposed between the adjacent LED modules from among the plurality of LED modules has a first width that is different from a second width of a second portion of the gap-fill layer disposed between other adjacent LED modules from among the plurality of LED modules, and
wherein the first width and the second width are measured at a same vertical level of the display device.