US 11,856,666 B2
Alternating current source direct driving LED lighting device
Myeong-Kook Gong, Yongin-si (KR); and Da-Young Gong, Yongin-si (KR)
Assigned to ISLT CO., LTD., Asan-si (KR)
Appl. No. 17/598,157
Filed by Myeong-Kook Gong, Yongin-si (KR); and Da-Young Gong, Yongin-si (KR)
PCT Filed Dec. 31, 2019, PCT No. PCT/KR2019/018768
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/204315, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 10-2019-0036766 (KR), filed on Mar. 29, 2019.
Prior Publication US 2022/0174799 A1, Jun. 2, 2022
Int. Cl. H05B 45/345 (2020.01); H05B 45/44 (2020.01); H05B 45/59 (2022.01)
CPC H05B 45/345 (2020.01) [H05B 45/44 (2020.01); H05B 45/59 (2022.01)] 13 Claims
OG exemplary drawing
 
1. An AC source direct driving LED lighting device comprising:
a light emitting unit which has a first electrolytic capacitor and receives a rectified AC voltage to adjust a first constant current and emits LED arrays;
a charging/discharging unit which receives the adjusted first constant current to be adjusted to second to fourth constant currents and charges/discharges embedded second to fourth electrolytic capacitors, respectively;
a discharge LED path unit which forms a path of discharging the voltage charged in the charging/discharging unit to the light emitting unit; and
a current driving unit which receives the adjusted first to fourth constant currents to form first to fourth channels using first to fourth reference voltages and controls current transfer.