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公开(公告)号：US10057967B1
公开(公告)日：2018-08-21
申请号：US15878116
申请日：2018-01-23
发明人： Daisuke Yamahara , Hiroyuki Asano , Satoshi Yagi , Koki Matsui
摘要： A lighting device includes: a first lighting control circuit; a second lighting control circuit which controls the first lighting control circuit; a first control power supply which supplies a first voltage to the first lighting control circuit; a second control power supply to which the first voltage is supplied and which supplies a second voltage to the second lighting control circuit; and a reset circuit which (i) when the reset circuit detects that the first voltage decreases to a first threshold or lower, causes the second control power supply to stop supply of the second voltage, and (ii) when the reset circuit detects that the first voltage increases to a second threshold or higher and that the second voltage is higher than a third threshold, causes the second control power supply to start supply of the second voltage after the second voltage decreases to the third threshold or lower.
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公开(公告)号：US09648681B2
公开(公告)日：2017-05-09
申请号：US15200289
申请日：2016-07-01
发明人： Masato Himeda , Hiroyuki Asano , Masafumi Yamamoto
CPC分类号： H05B33/0815 , H05B33/0845 , H05B33/0851 , H05B37/0281
摘要： A lighting device includes: a signal converting circuit which receives a dimming signal that is a rectangular voltage signal, and converts the dimming signal to a DC voltage signal corresponding to a duty ratio of the dimming signal; and a power supply circuit which receives an AC voltage and outputs DC current having a current value corresponding to the DC voltage signal. The signal converting circuit includes a resistor-capacitor (RC) circuit which integrates a signal corresponding to the dimming signal by way of charging and discharging to produce the DC voltage signal, and a time constant of the RC circuit during charging is greater than a time constant of the RC circuit during discharging.
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公开(公告)号：US09800169B2
公开(公告)日：2017-10-24
申请号：US15397954
申请日：2017-01-04
发明人： Masato Himeda , Hiroyuki Asano
CPC分类号： H02M7/06 , H02M1/32 , H02M1/4241 , H02M2003/1557 , H05B33/0815 , H05B33/0887 , Y02B20/346 , Y02B70/126
摘要： A DC power supply device includes a rectifier circuit, a conversion circuit and a control circuit. Conversion circuit includes a first capacitor, a first series circuit, a second series circuit, a third series circuit, a second diode and a Zener diode. First series circuit includes a first inductor and a switching element connected in series with each other. Second series circuit includes a second capacitor and a second inductor connected in series with each other. Third series circuit includes a first diode and a third capacitor connected in series with each other. First series circuit is electrically connected between both ends of first capacitor. Second series circuit is electrically connected in parallel with switching element. A cathode of Zener diode is connected with a connection point of first inductor and second capacitor. Zener diode has a Zener voltage larger than an output voltage of conversion circuit.
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公开(公告)号：US09763294B2
公开(公告)日：2017-09-12
申请号：US14944267
申请日：2015-11-18
发明人： Masato Himeda , Hiroyuki Asano , Masafumi Yamamoto , Takeshi Kamoi , Daisuke Yamahara , Keisuke Seki , Katsuyuki Doi
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0812 , Y02B20/343 , Y02B20/345
摘要： A lighting device includes a rectifier circuit, a conversion circuit, a constant current circuit and a control circuit. The conversion circuit includes a first series circuit, a second series circuit and a third series circuit. The conversion circuit is configured to output a DC current by on/off of a switching element being controlled by the control circuit. A high potential-side terminal of the third capacitor is electrically connected to an output terminal. The low potential-side terminal of the third capacitor is electrically connected to an output terminal, via the constant current circuit.
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公开(公告)号：US09456477B2
公开(公告)日：2016-09-27
申请号：US14944272
申请日：2015-11-18
发明人： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara , Hiroyuki Asano , Masafumi Yamamoto , Masato Himeda , Katsuyuki Doi
CPC分类号： H05B33/0815 , H05B33/0812 , H05B33/0842 , Y02B20/343 , Y02B20/346
摘要： A lighting device includes a rectifier circuit, a conversion circuit and a control circuit. A first inductor of a first series circuit and a second inductor of a second series circuit have inductances by which a time period, during which a diode is electrically conducted, is made shorter than a half period of a resonance period of a closed loop circuit. The closed loop circuit includes a first capacitor, the first inductor, a second capacitor and a third capacitor. The control circuit is configured to control a switching element in such a manner that the switching element is turned on at fixed periods.
摘要翻译： 照明装置包括整流电路，转换电路和控制电路。 第一串联电路的第一电感器和第二串联电路的第二电感器具有电感，通过该电感使二极管导通的时间周期短于闭环回路的谐振周期的半周期。 闭环电路包括第一电容器，第一电感器，第二电容器和第三电容器。 控制电路被配置为以这样的方式控制开关元件，使得开关元件以固定的周期接通。
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