US 11,842,987 B2
LED display panel, LED display apparatus having the same and method of fabricating the same
Seong Kyu Jang, Ansan-si (KR); Seom Geun Lee, Ansan-si (KR); Chan Seob Shin, Ansan-si (KR); and Ho Joon Lee, Ansan-si (KR)
Assigned to Seoul Viosys Co., Ltd., Ansan-si (KR)
Filed by Seoul Viosys Co., Ltd, Ansan-si (KR)
Filed on Jul. 15, 2022, as Appl. No. 17/866,249.
Application 17/866,249 is a continuation of application No. 16/855,258, filed on Apr. 22, 2020, granted, now 11,424,224.
Claims priority of provisional application 62/837,800, filed on Apr. 24, 2019.
Prior Publication US 2022/0367427 A1, Nov. 17, 2022
Int. Cl. H01L 25/075 (2006.01); H01L 33/58 (2010.01); H01L 33/00 (2010.01); H01L 33/62 (2010.01)
CPC H01L 25/0753 (2013.01) [H01L 33/0093 (2020.05); H01L 33/58 (2013.01); H01L 33/62 (2013.01); H01L 2933/0058 (2013.01); H01L 2933/0066 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display panel, comprising:
a circuit board having pads;
light emitting devices electrically connected to the pads and arranged on the circuit board, each light emitting device having a first surface facing the circuit board and a second surface opposite to the first surface;
a buffer material layer disposed between the circuit board and the light emitting devices to fill a space between the circuit board and the light emitting devices; and
a cover layer covering the second surface of the light emitting devices,
wherein:
the buffer material layer is disposed under the first surfaces of the light emitting devices and has grooves in a region between adjacent light emitting devices;
a portion of a top surface of the buffer material layer is disposed between adjacent light emitting devices;
the cover layer fills the grooves of the buffer material layer; and
a width of at least one of the grooves that is covered by the cover layer corresponds to a distance between the adjacent light emitting devices.