US 12,441,635 B2
Light emitting device
Byeong Cheol Ju, Ansan-si (KR); Jae Young Choi, Ansan-si (KR); and Ji Hyun Jo, Ansan-si (KR)
Assigned to SEOUL VIOSYS CO., LTD., Ansan-si (KR)
Appl. No. 17/640,977
Filed by SEOUL VIOSYS CO., LTD., Ansan-si (KR)
PCT Filed Sep. 2, 2020, PCT No. PCT/KR2020/011750
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2021/045498, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 10-2019-0111037 (KR), filed on Sep. 6, 2019.
Prior Publication US 2022/0340449 A1, Oct. 27, 2022
Int. Cl. C02F 1/32 (2023.01)
CPC C02F 1/325 (2013.01) [C02F 2201/3222 (2013.01); C02F 2201/326 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a main body disposed on a liquid surface forming a boundary between air and a liquid and movable vertically and laterally in response to movement of the liquid surface, the main body having a height measured between the liquid surface and an uppermost portion of the main body and having a center of gravity located below a middle of the height; and
a light source mounted on the main body and emitting light toward the liquid to treat the liquid,
wherein the light source comprises a light emitting diode comprising semiconductor layers doped with different conductivity types of dopants and an active layer interposed between the semiconductor layers,
wherein the main body has a first piece and a second piece that define an interior of the main body that is filled with a material having a lower specific gravity lower than water, the material allowing the light emitting device to be disposed on the liquid surface,
wherein the first piece has flat portions disposed at a lowermost location of the main body and contacting the liquid surface and the light source is disposed between the flat portions along a first direction parallel to the liquid surface, and
wherein the flat portions include regions disposed to be substantially symmetrical to each other with respect to the light source disposed between the flat portions and located at a position lower than the light source along a second direction perpendicular to the first direction.