公开(公告)号：US20190098717A1

公开(公告)日：2019-03-28

申请号：US16138987

申请日：2018-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenichi FUKUDA ,  Hirofumi KONISHI ,  Masashi MOTOMURA

IPC: H05B33/08 ,  H05B37/02

Abstract: The ballast system includes constant current circuits, the power supply circuit, signal paths, a control circuit and pull-up circuits. A junction point of resistors in each of the pull-up circuits is connected to a corresponding signal path of the signal paths.

公开(公告)号：US20180063918A1

公开(公告)日：2018-03-01

申请号：US15675250

申请日：2017-08-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshiaki NAKAMURA ,  Kazuya KATO ,  Kenichi FUKUDA ,  Akihiro KISHIMOTO

IPC: H05B37/02 ,  H05B39/02 ,  F21S8/10 ,  B60Q1/00

CPC classification number: H05B37/02 ,  B60Q1/0094 ,  F21S43/00 ,  H05B33/083 ,  H05B39/02

Abstract: An impedance adjustment circuit varies an impedance of a transistor, thereby adjusting an impedance of a current path. A second control circuit controls a drive circuit to turn on or off at least one switch device of the switch devices while the impedance adjustment circuit is increasing the impedance of the current path. The impedance adjustment circuit adjusts the impedance of the current path to the minimum value after the drive circuit switches the at least one switch device from off to on or from on to off.

公开(公告)号：US20170223791A1

公开(公告)日：2017-08-03

申请号：US15416076

申请日：2017-01-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenichi FUKUDA ,  Hirofumi KONISHI ,  Masashi MOTOMURA

IPC: H05B33/08 ,  F21V23/06 ,  F21V21/005 ,  F21V3/00 ,  H05B37/02 ,  F21S8/04

CPC classification number: H05B33/0815 ,  F21S8/04 ,  F21V3/00 ,  F21V21/005 ,  F21V23/06 ,  F21Y2115/10 ,  H05B33/0845 ,  H05B33/0863 ,  H05B37/0263 ,  H05B37/0272 ,  Y02B20/346

Abstract: A control circuit is configured to, when switching a state of a light source from an extinguished state to a lighting state, control a voltage conversion circuit so that a second DC voltage has a voltage value which changes according to transmission data containing an activation command. A lighting device is configured to keep the state of the light source at the extinguished state until receiving the activation command from the receiver circuit, and to change the state of the light source to the lighting state when receiving the activation command from the receiver circuit.

公开(公告)号：US20160374162A1

公开(公告)日：2016-12-22

申请号：US15178850

申请日：2016-06-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Katsuyoshi NAKADA ,  Keisuke UEDA ,  Kenichi FUKUDA

IPC: H05B33/08 ,  H02M7/06 ,  H02M1/36 ,  H05B37/02

CPC classification number: H05B33/0815 ,  H02M3/156 ,  H05B33/0818 ,  H05B33/0845 ,  H05B37/0281

Abstract: A lighting device which outputs a DC current to a load, the lighting device including: a downconverter circuit which includes a switching element and steps down a DC voltage input to the downconverter circuit; and a controller which controls turning on and off of the switching element, wherein the controller has operating modes including a detection mode in which the controller detects a time taken for a current through the switching element to reach a predetermined value after the switching element turns on, the current through the switching element representing the DC current output to the load.

Abstract translation: 一种向负载输出直流电流的照明装置，所述照明装置包括：下变频器电路，其包括开关元件并降压输入到所述下变频器电路的直流电压; 以及控制器，其控制所述开关元件的接通和断开，其中所述控制器具有包括检测模式的操作模式，其中所述控制器在所述开关元件接通之后检测到通过所述开关元件的电流达到预定值所花费的时间 ，通过开关元件的电流代表输出到负载的直流电流。