公开(公告)号：US09967948B2

公开(公告)日：2018-05-08

申请号：US15677172

申请日：2017-08-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takashi Kambara

IPC: H05B33/08 ,  F21V23/02 ,  H02M3/335 ,  F21Y115/10

CPC classification number: H05B33/089 ,  B60Q1/0023 ,  B60Q1/0094 ,  B60Q1/1415 ,  F21S41/148 ,  F21S41/255 ,  F21V23/02 ,  F21Y2115/10 ,  H02M3/156 ,  H02M3/33507 ,  H02M2001/008 ,  H02M2001/327 ,  H05B33/0815 ,  H05B33/0848 ,  H05B33/0887

Abstract: A lighting device includes a current outputter, a load characteristic obtainer and a controller. The current outputter is configured to supply a current to a light source of at least one light source unit. The load characteristic obtainer is configured to obtain load information from a corresponding load information outputter of the at least one light source unit, by supplying the electric power to the load information outputter. The controller is configured to control the current of the current outputter, which is supplied to the light source, based on the load information. The load characteristic obtainer is configured to supply the electric power to the corresponding load information outputter only during a time period of obtaining the load information, but stop supply of the electric power to the corresponding load information outputter during a time period other than the time period of obtaining the load information.

公开(公告)号：US10779366B2

公开(公告)日：2020-09-15

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: B60Q1/14 ,  H05B45/00 ,  F21S41/148 ,  H05B45/37 ,  B60Q1/04 ,  F21S41/30 ,  F21S45/47 ,  B60Q3/80

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.