US 12,293,995 B2
Apparatus and method for collecting semiconductor light emitting diodes
Dohwan Yang, Seoul (KR); Dohee Kim, Seoul (KR); Yongil Shin, Seoul (KR); and Bongchu Shim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/638,163
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Sep. 3, 2019, PCT No. PCT/KR2019/011283
§ 371(c)(1), (2) Date Feb. 24, 2022,
PCT Pub. No. WO2021/040111, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 10-2019-0106060 (KR), filed on Aug. 28, 2019.
Prior Publication US 2022/0367423 A1, Nov. 17, 2022
Int. Cl. H01L 33/62 (2010.01); H01L 25/075 (2006.01); H01L 33/00 (2010.01)
CPC H01L 25/0753 (2013.01) [H01L 33/005 (2013.01); H01L 33/62 (2013.01); H01L 2933/0066 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A device for collecting semiconductor light emitting diodes, the device comprising:
at least one electromagnet disposed in a fluid chamber into which the semiconductor light emitting diodes are put, the at least one electromagnet comprising a magnetic material configured to form a magnetic field when power is applied;
a power supply coupled to the at least one electromagnet and configured to apply power to the at least one electromagnet; and
a driver configured to move the at least one electromagnet along one or more of a width direction, a longitudinal direction, or a height direction of the fluid chamber,
wherein the at least one electromagnet is configured to guide the semiconductor light emitting devices to a surface at which the magnetic field is formed when power is applied,
wherein the at least one electromagnet comprises:
a first electromagnet disposed adjacent to a bottom surface of the fluid chamber; and
a second electromagnet spaced apart from the first electromagnet by an interval, and
wherein the first electromagnet and the second electromagnet are configured to operate independently.