公开(公告)号：US20170064783A1

公开(公告)日：2017-03-02

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 ,  A47F3/04 ,  F25D27/00 ,  A47F3/00 ,  F21V15/01 ,  F21V33/00

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.

Abstract translation: 光输出控制装置包括开关装置，多个信号输入端口，信号选择电路和控制电路。 开关装置电连接在直流电源和光源电路之间。 光源电路包括半导体发光元件。 多个信号输入端口分别对应于多种光输出控制信号。 当通过多个信号输入端口接收到指示不同的光输出电平的两个或多个光输出控制信号时，信号选择电路选择指示来自两个或更多个光输出的最低（或最高）光输出电平的光输出控制信号 控制信号。 控制电路以对应于由信号选择电路选择的光输出控制信号指示的最低（或最高）光输出电平的占空比执行开关装置的开关控制。

公开(公告)号：US20160113079A1

公开(公告)日：2016-04-21

申请号：US14885117

申请日：2015-10-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akinori HIRAMATU ,  Hirohiko NOJIRI ,  Takeshi KAMOI ,  Hiroshi KIDO

IPC: H05B33/08

CPC classification number: H05B33/0818 ,  Y02B20/347

Abstract: A light source circuit includes light-emitting diodes and a constant current circuit that controls current flowing through light-emitting diodes to a fixed level. A DC power supply circuit outputs a DC voltage having a voltage value capable of causing light-emitting diodes to emit light. A light modulation control unit includes: a MOSFET electrically connected between DC power supply circuit and light source circuit; and a control circuit configured to control MOSFET. Control circuit is configured to turn MOSFET on and off with a duty ratio corresponding to a light modulation level such that DC voltage that is outputted from DC power supply circuit is converted to a square wave voltage, and the square wave voltage is outputted to light source circuit. The square wave voltage has an amplitude equal to the voltage value of the DC voltage that is outputted from DC power supply circuit.

Abstract translation: 光源电路包括发光二极管和将流过发光二极管的电流控制到固定电平的恒流电路。 直流电源电路输出具有能够使发光二极管发光的电压值的直流电压。 光调制控制单元包括：电连接在直流电源电路和光源电路之间的MOSFET; 以及配置为控制MOSFET的控制电路。 控制电路被配置为以与光调制电平相对应的占空比来接通和关断MOSFET，使得从直流电源电路输出的直流电压转换为方波电压，并且将方波电压输出到光源 电路。 方波电压的幅度等于从直流电源电路输出的直流电压的电压值。