公开(公告)号：US20200146125A1

公开(公告)日：2020-05-07

申请号：US16630678

申请日：2018-07-12

Applicant: LG INNOTEK CO., LTD.

Inventor： Ji Woong JO ,  Jong Hyun LEE ,  Jae Ho CHOI ,  Min Hak KIM ,  Min Su SEO ,  Seung Wan BAEK

IPC: H05B45/392 ,  H05B45/14 ,  H01L29/866

Abstract: An LED lighting device according to one embodiment of the present invention comprises: an LED array; a first control unit for controlling the dimming of the LED array; a second control unit for transmitting, to the first control unit, a dimming control signal for controlling the dimming of the LED array; and a transformer comprising a primary coil and a secondary coil spaced apart from each other, wherein the first control unit is connected to the primary coil, the second control unit is connected to the secondary coil, the primary coil and the secondary coil are insulated from each other, the transformer transmits a pulse signal that repeats on/off at predetermined intervals from the first control unit to the second control unit, and, when the pulse signal transmitted from the first control unit to the second control unit via the transformer becomes off, the dimming control signal is transmitted from the second control unit to the first control unit via the transformer and is used to control the dimming of the LED array.