公开(公告)号：US20180235058A1

公开(公告)日：2018-08-16

申请号：US15878116

申请日：2018-01-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daisuke YAMAHARA ,  Hiroyuki ASANO ,  Satoshi YAGI ,  Koki MATSUI

IPC: H05B37/02

CPC classification number: H05B37/0272 ,  H05B37/0281

Abstract: A lighting device includes: a first lighting control circuit; a second lighting control circuit which controls the first lighting control circuit; a first control power supply which supplies a first voltage to the first lighting control circuit; a second control power supply to which the first voltage is supplied and which supplies a second voltage to the second lighting control circuit; and a reset circuit which (i) when the reset circuit detects that the first voltage decreases to a first threshold or lower, causes the second control power supply to stop supply of the second voltage, and (ii) when the reset circuit detects that the first voltage increases to a second threshold or higher and that the second voltage is higher than a third threshold, causes the second control power supply to start supply of the second voltage after the second voltage decreases to the third threshold or lower.

公开(公告)号：US20160366741A1

公开(公告)日：2016-12-15

申请号：US15171444

申请日：2016-06-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi YAGI ,  Kei MITSUYASU ,  Shinichiro GOTO ,  Tomohiro SUGIURA ,  Katsuyoshi NAKADA

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/0815 ,  H05B41/3924

Abstract: A dimming lighting circuit includes: a rectifier circuit; a phase detection circuit which outputs a dimming signal having a signal level corresponding to a conduction phase angle of an AC voltage; and a DC-DC converter which receives a DC voltage output from the rectifier circuit and supplies a light source with a DC current corresponding to the signal level of the dimming signal output from the phase detection circuit. If the conduction phase angle detected when the dimming lighting circuit receives the AC voltage at power-on is less than or equal to a predetermined angle, the phase detection circuit outputs, as the dimming signal, a substitute signal having a signal level corresponding to a conduction phase angle greater than the conduction phase angle of the AC voltage, for a predetermined time period.

Abstract translation: 调光点亮电路包括：整流电路; 相位检测电路，其输出具有与交流电压的导通相位角对应的信号电平的调光信号; 以及DC-DC转换器，其接收从整流电路输出的直流电压，并向光源提供与从相位检测电路输出的调光信号的信号电平相对应的直流电流。 如果在调光点亮电路接通上电时的交流电压时检测到的导通相位角小于或等于预定角度，则相位检测电路输出具有对应于信号电平的信号电平的替代信号作为调光信号， 导通相位角大于交流电压的导通相位角，预定时间段。