公开(公告)号：US10159129B2

公开(公告)日：2018-12-18

申请号：US15898475

申请日：2018-02-17

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hiroshi Kido ,  Shigeru Ido ,  Hisao Kataoka

IPC: H05B33/00 ,  H05B33/08 ,  H05B37/02

Abstract: A lighting device which causes a first light source to emit illumination light and a second light source to emit illumination light having a color temperature higher than a color temperature of the illumination light emitted by the first light source includes: an illuminator which includes a first switching element connected in series to the first light source, and a second switching element connected in series to the second light source; an illumination controller which controls the illuminator to place at least one of the first switching element and the second switching element into an off state; and a constant-current controller which detects a sum of values of currents flowing through the first light source and the second light source, and controls the first switching element and the second switching element based on the sum.

公开(公告)号：US09756689B2

公开(公告)日：2017-09-05

申请号：US15232522

申请日：2016-08-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shigeru Ido ,  Katsuhiko Ishikawa ,  Hirohiko Nojiri

IPC: H05B33/08 ,  A47F3/00 ,  A47F3/04 ,  F21V15/01 ,  F21V33/00 ,  F21Y115/10 ,  F25D27/00

CPC classification number: H05B33/0815 ,  A47F3/001 ,  A47F3/0469 ,  F21V15/01 ,  F21V33/0044 ,  F21Y2115/10 ,  F25D27/005 ,  H05B33/0812 ,  H05B33/083 ,  H05B33/0845 ,  H05B33/0887 ,  Y02B20/343 ,  Y02B20/346

Abstract: A light output control device includes a switching device, multiple signal input ports, a signal selection circuit, and a control circuit. The switching device is to be electrically connected between a direct-current power supply and a light source circuit. The light source circuit includes a semiconductor light emitting element. The multiple signal input ports respectively correspond to multiple kinds of light output control signals. The signal selection circuit selects, when receiving two or more light output control signals indicating different light output levels through the multiple signal input ports, a light output control signal indicating a lowest (or highest) light output level, from the two or more light output control signals. The control circuit performs switching control of the switching device with a duty cycle corresponding to the lowest (or highest) light output level indicated by the light output control signal selected by the signal selecting circuit.

公开(公告)号：US09622308B2

公开(公告)日：2017-04-11

申请号：US15134687

申请日：2016-04-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shigeru Ido

IPC: H05B37/00 ,  H05B33/08

CPC classification number: H05B33/0827

Abstract: A lighting device includes a first current controller, a second current controller, and a charging current controller. The first current controller is configured to control current flowing through a light source so that the current flowing through the light source does not exceed a first predefined value. The charging current controller is configured to control current flowing through a storage element. The second current controller is configured to control current flowing through a first light source so that the current flowing through the first light source does not exceed a second predefined value.

公开(公告)号：US09380667B2

公开(公告)日：2016-06-28

申请号：US14743539

申请日：2015-06-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shigeru Ido ,  Hiroshi Kido ,  Akinori Hiramatu ,  Takeshi Kamoi ,  Katsushi Seki ,  Daisuke Yamahara ,  Daisuke Ueda

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/083 ,  H05B33/0809 ,  H05B33/089 ,  H05B37/02

Abstract: An illumination device includes a main light source block having a plurality of main light sources and a plurality of current limiters, and an auxiliary light source block having an auxiliary light source and a constant-current unit. A series circuit of the auxiliary light source and the constant-current unit is electrically connected in parallel with the main light source block, between first and second output terminals of a rectifier. A smoothing capacitor is electrically connected in parallel with a specific main light source among the plurality of main light sources. The specific main light source and a corresponding current limiter are electrically connected in parallel with the series circuit of the auxiliary light source and the constant-current unit.

Abstract translation: 照明装置包括具有多个主光源和多个限流器的主光源块，以及具有辅助光源和恒流单元的辅助光源块。 辅助光源和恒流单元的串联电路在整流器的第一和第二输出端子之间与主光源块并联电连接。 平滑电容器与多个主光源中的特定主光源并联地电连接。 特定主光源和对应的限流器与辅助光源和恒流单元的串联电路并联电连接。