-
公开(公告)号：US09949329B2
公开(公告)日：2018-04-17
申请号：US15646525
申请日：2017-07-11
Inventor： Katsuyuki Doi
CPC classification number: H05B33/0845 , H05B33/0815 , H05B33/0848 , H05B33/0851 , H05B37/0272
Abstract: In a lighting device, a voltage detector outputs a detection voltage with a magnitude corresponding to a magnitude of a DC voltage outputted from a power supply circuit, a state determiner makes determination of whether a light source is in a turned-on state or in a turned-off state, a power controller is configured to control a DC power supplied from the power supply circuit based on a result of the determination by the state determiner, and the state determiner determines, when a value obtained by subtracting the detection voltage from a first reference voltage is equal to or larger than a first threshold value, that the light source is in the turned-off state.
-
公开(公告)号：US09456477B2
公开(公告)日：2016-09-27
申请号：US14944272
申请日：2015-11-18
Inventor： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara , Hiroyuki Asano , Masafumi Yamamoto , Masato Himeda , Katsuyuki Doi
CPC classification number: H05B33/0815 , H05B33/0812 , H05B33/0842 , Y02B20/343 , Y02B20/346
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号：US09763294B2
公开(公告)日：2017-09-12
申请号：US14944267
申请日：2015-11-18
Inventor： Masato Himeda , Hiroyuki Asano , Masafumi Yamamoto , Takeshi Kamoi , Daisuke Yamahara , Keisuke Seki , Katsuyuki Doi
IPC: H05B33/08
CPC classification number: H05B33/0815 , H05B33/0812 , Y02B20/343 , Y02B20/345
Abstract: 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.
-
公开(公告)号：US09369053B2
公开(公告)日：2016-06-14
申请号：US14627069
申请日：2015-02-20
Inventor： Kiyoshi Ogasawara , Takafumi Fujino , Hiromichi Goto , Teruhito Takeda , Satohiko Hosomi , Kei Mitsuyasu , Katsuyuki Doi , Hideaki Abe
CPC classification number: H02M3/33569 , H02M1/4266 , H02M7/06 , H02M2001/0006 , H02M2001/0058 , H02M2001/007 , H05B33/0815 , Y02B20/346 , Y02B70/123 , Y02B70/1491
Abstract: In a power supply device, a primary winding of a transformer is connected in series to a main switching element, and is connected in parallel to a series circuit of a resonance capacitor and a sub switching element. A secondary winding of the transformer is connected in series to a series circuit of a rectifying element and a resonance inductor. The capacitance of the resonance capacitor and the inductance of the resonance inductor are each set such that, when the sub switching element is in an on state, the waveform of the voltage that is generated between the first main terminal and the second main terminal of the main switching element takes a protruding curve shape, the voltage being generated due to a resonance phenomenon of at least the resonance capacitor and the resonance inductor.
Abstract translation: 在电源装置中，变压器的初级绕组与主开关元件串联连接，并联连接到谐振电容器和副开关元件的串联电路。 变压器的次级绕组串联连接到整流元件和谐振电感器的串联电路。 共振电容器的电容和谐振电感的电感各自被设定为使得当副开关元件处于导通状态时，在第一主端子和第二主端子之间产生的电压的波形 主开关元件呈现突出的曲线形状，由于至少谐振电容器和谐振电感器的谐振现象而产生电压。
-
-
-
Search Results
4
records
(took 0.014 seconds)
