公开(公告)号：US20200100338A1

公开(公告)日：2020-03-26

申请号：US16576837

申请日：2019-09-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshiya MORIWAKI ,  Masanobu MURAKAMI ,  Masahiko KOIZEKI ,  Takashi KAMBARA

IPC: H05B33/08 ,  F21S41/148

Abstract: A lighting apparatus includes a control circuit configured to control a power supply circuit such that a measurement value of an output current measured by a current measuring device approaches a target value. The control circuit is configured to execute a control mode alternatively selected from the plurality of control modes to control the power supply circuit. The plurality of control modes of the control circuit includes at least a first control mode and a second control mode. The first control mode is a control mode of adjusting the target value in accordance with a first direct-current voltage. The second control mode is a control mode which includes adjusting the target value regardless of the first direct-current voltage.