公开(公告)号：US11617242B2

公开(公告)日：2023-03-28

申请号：US17387722

申请日：2021-07-28

申请人： XIAMEN LEEDARSON LIGHTING CO., LTD

发明人： Lingfeng Zhou ,  Zongyan Liu ,  Bin Liu ,  Liangliang Cao ,  Yueqiang Zhang

IPC分类号： H05B45/10 ,  H05B47/19 ,  H05B45/325 ,  H02M3/24

摘要： A lighting apparatus includes a light source, a rectifier circuit, a DC-DC converter, an adjustment circuit and a controller. The rectifier circuit converts an AC power to a raw direct current. The adjustment circuit provides an adjustment signal corresponding a light intensity setting of the light source. The controller is coupled to the DC-DC converter and the adjustment circuit. The controller receives the adjustment signal for generating a first PWM signal. The DC-DC converter receives the first PWM signal. The DC-DC converter converts the raw direct current to an output current according to a first duty ratio of the first PWM signal. The output current is supplied to the light source corresponding to the light intensity setting.

公开(公告)号：US20220039224A1

公开(公告)日：2022-02-03

申请号：US17387722

申请日：2021-07-28

申请人： XIAMEN LEEDARSON LIGHTING CO.,LTD

发明人： Lingfeng Zhou ,  Zongyan Liu ,  Bin Liu ,  Liangliang Cao ,  Yueqiang Zhang

IPC分类号： H05B45/10 ,  H05B45/325 ,  H05B47/19 ,  H02M3/24

摘要： A lighting apparatus includes a light source, a rectifier circuit, a DC-DC converter, an adjustment circuit and a controller. The rectifier circuit converts an AC power to a raw direct current. The adjustment circuit provides an adjustment signal corresponding a light intensity setting of the light source. The controller is coupled to the DC-DC converter and the adjustment circuit. The controller receives the adjustment signal for generating a first PWM signal. The DC-DC converter receives the first PWM signal. The DC-DC converter converts the raw direct current to an output current according to a first duty ratio of the first PWM signal. The output current is supplied to the light source corresponding to the light intensity setting.