公开(公告)号：US20180283643A1

公开(公告)日：2018-10-04

申请号：US15927762

申请日：2018-03-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro FUKUI ,  Masanobu MURAKAMI ,  Takahiro OHORI

IPC: F21S45/10 ,  F21V23/02 ,  F21S45/43

CPC classification number: F21S45/10 ,  F21S41/141 ,  F21S45/43 ,  F21V23/02 ,  F21Y2115/10

Abstract: A lighting device includes an output adjustment circuit, a smoothing circuit and a control circuit. The smoothing circuit receives a binary rotation detection signal according to the rotation of a fan and smooths the rotation detection signal to produce a smoothed signal. The control circuit detects a rotation malfunction of the fan when the smoothed signal is greater than or equal to an upper limit threshold over first predetermined time or when the smoothed signal is smaller than or equal to a lower limit threshold over second predetermined time.

公开(公告)号：US20180288846A1

公开(公告)日：2018-10-04

申请号：US15935039

申请日：2018-03-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro OHORI ,  Takahiro FUKUI ,  Masanobu MURAKAMI

IPC: H05B33/08 ,  B60Q1/14 ,  H02P7/18

CPC classification number: H05B33/0845 ,  B60Q1/0017 ,  B60Q1/1407 ,  B60Q1/1415 ,  H02P7/18 ,  H05B33/0809 ,  H05B33/0842

Abstract: In a power supply, a first output terminal and a second output terminal are electrically connected to each other, and a first common terminal and a second common terminal are electrically connected to each other. When a value of a consumption current of a motor is equal to or smaller than a value of a maximum output current of a second constant voltage circuit, the second constant voltage circuit keeps a second voltage at a steady voltage value. When the value of the consumption current of the motor is larger than the value of the maximum output current, the second constant voltage circuit control the second voltage to have a value smaller than a value of the first voltage, and a first constant voltage circuit supplies a differential current which corresponds to a difference between the consumption current of the motor and the maximum output current of the second constant voltage circuit.

公开(公告)号：US20150366014A1

公开(公告)日：2015-12-17

申请号：US14762629

申请日：2014-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuhiko ITOH ,  Akira TAKAHASHI ,  Masanobu MURAKAMI

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M1/081 ,  H02M1/4225 ,  H02M3/1582 ,  H02M2001/007 ,  H05B33/0845 ,  H05B33/0848 ,  Y02B20/346 ,  Y02B70/126

Abstract: A driving circuit includes a rectifying and smoothing circuit that rectifies an AC dimming signal, and a voltage conversion circuit (1A) including: a switching element having a source connected to a low-potential output terminal of the rectifying and smoothing circuit; a diode having an anode connected to a high-potential output terminal of the rectifying and smoothing circuit; an inductor disposed between the diode and a drain of the switching element; an oscillation controller; a capacitor that is charged by receiving magnetic energy from the inductor when the switching element is OFF, and discharges to a load when the switching element is ON; and a power control circuit that applies a voltage corresponding to a voltage at a high-potential terminal of the capacitor to the oscillation controller as a supply voltage for driving the oscillation controller.

Abstract translation: 驱动电路包括对交流调光信号进行整流的整流和平滑电路;以及电压转换电路（1A），包括：开关元件，源极连接到整流和平滑电路的低电位输出端; 二极管，其阳极连接到整流和平滑电路的高电位输出端; 设置在所述二极管和所述开关元件的漏极之间的电感器; 振荡控制器; 电容器，当开关元件断开时，通过从电感器接收磁能来进行充电，并且当开关元件接通时将其放电到负载; 以及功率控制电路，其将与电容器的高电位端子处的电压相对应的电压施加到振荡控制器，作为用于驱动振荡控制器的电源电压。

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.

公开(公告)号：US20180283637A1

公开(公告)日：2018-10-04

申请号：US15936779

申请日：2018-03-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanobu MURAKAMI ,  Takahiro FUKUI ,  Takahiro OHORI

IPC: F21S41/19 ,  F21S41/141 ,  H05B33/08

Abstract: The lighting device lights an illumination load in which a first light source block and a second light source block are coupled in series. The lighting device includes a switch unit coupled in parallel with the second light source block. The switch unit includes a series circuit of a switching element and a resistor. The lighting device keeps the switching element off to set a state of the illumination load to a first state. The lighting device keeps the switching element on to set the state of the illumination load to a second state. The resistor has its resistance allowing a value of a voltage across the switch unit to be smaller than a value of a voltage across the second light source block which causes the second light source block to light while the switching element is on.