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公开(公告)号：US09992837B1
公开(公告)日：2018-06-05
申请号：US15829888
申请日：2017-12-02
Inventor： Shinichi Murakami , Kazuhiro Kumada , Ryuhei Hayashi
IPC: H05B33/08 , F21V23/00 , F21Y115/10 , F21W131/406 , F21S8/02
CPC classification number: H05B33/0845 , F21S8/00 , F21S8/026 , F21V23/001 , F21W2131/406 , F21Y2115/10 , F21Y2115/20 , H05B33/0812 , H05B33/0815
Abstract: A lighting device includes: a variable voltage source; a transistor which controls a current flowing through a light-emitting element; and a control circuit which causes the transistor to pass a current corresponding to a received instruction for a dimming level through the light-emitting element. When the received instruction instructs at least a predetermined dimming level, the control circuit causes a voltage drop in the transistor to become a first voltage by controlling the variable voltage source, and when the received instruction instructs a dimming level less than the predetermined dimming level, the control circuit causes the voltage drop to become a second voltage higher than the first voltage, by controlling the variable voltage source.
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2.发明授权Lighting device, luminaire using lighting device, and lighting system using luminaire 有权照明装置，使用照明装置的灯具和使用照明装置的照明系统公开(公告)号：US09485822B2
公开(公告)日：2016-11-01
申请号：US14974449
申请日：2015-12-18
Inventor： Shinichi Murakami , Koji Watanabe , Kazuhiro Kumada , Miyo Kangyo
CPC classification number: H05B33/0824 , H05B33/0815 , Y02B20/346
Abstract: A lighting device includes at least first and second lighting circuits configured to receive electric power from a single common DC power supply. First lighting circuit includes a first output capacitor connected between output ends thereof, and a first pre-charge circuit configured to keep a voltage across first output capacitor at a first voltage for first lighting circuit, while a first light source is in OFF state. Second lighting circuit includes a second output capacitor connected between output ends thereof; and a second pre-charge circuit configured to keep a voltage across second output capacitor at a second voltage for second lighting circuit, while a second light source is in OFF state. First and second voltages are set such that a difference between a forward voltage of first light source and the first voltage agrees with a difference between a forward voltage of second light source and the second voltage.
Abstract translation: 照明装置包括至少第一和第二照明电路，其被配置为从单个公共DC电源接收电力。 第一照明电路包括连接在其输出端之间的第一输出电容器和被配置为在第一光源处于截止状态时将第一输出电容器两端的电压保持在第一照明电路的第一电压的第一预充电电路。 第二照明电路包括连接在其输出端之间的第二输出电容器; 以及第二预充电电路，其被配置为在第二光源处于OFF状态时将第二输出电容器两端的电压保持在第二电压的第二电压。 第一和第二电压被设置为使得第一光源的正向电压和第一电压之间的差与第二光源的正向电压和第二电压之间的差一致。
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公开(公告)号：US10076010B2
公开(公告)日：2018-09-11
申请号：US15650880
申请日：2017-07-15
Inventor： Kazuhiro Kumada , Shinichi Murakami
CPC classification number: H05B33/0848 , G05F1/10 , H05B33/0818 , H05B33/0845 , H05B33/0866 , H05B33/0884 , H05B37/02 , Y02B20/347
Abstract: A constant current is configured to control an FET to adjust a drain current so that a detection voltage is equal to a reference voltage. A reference setter is configured to set the reference voltage to a sum of a first voltage and a second voltage. The first voltage is equal to a voltage developing across the detection resistor while a current, which has a same magnitude as a current supplied to the light source so that a current dimming level of the light source is equal to the dimming instruction value, flows through the detection resistor. The second voltage is equal to a voltage developing across the detection resistor while a second current, which has a same magnitude as a current flowing through the limiting resistor while the light source is on, flows through the detection resistor.
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公开(公告)号：US09295138B2
公开(公告)日：2016-03-22
申请号：US14546772
申请日：2014-11-18
Inventor： Kazuhiro Kumada
CPC classification number: H05B37/02 , H05B33/0818 , H05B33/0851
Abstract: A lighting device includes a step-down chopper circuit and a controller configured to control the step-down chopper circuit. The controller is configured to turn on and off a low-side switching device in the step-down chopper circuit at a fixed frequency. The controller includes an operation unit configured to determine a reference voltage value, an output unit configured to output, as a difference signal, a difference between the reference voltage value determined by the operation unit and an average value of a voltage proportional to a current flowing through the switching device, and a control circuit configured to determine an on-time period of the switching device. The control circuit includes an oscillator configured to generate a voltage signal shaped like teeth of a saw. The control circuit is configured to determine the on-time period of the switching device based on the voltage signal and the difference signal.
Abstract translation: 照明装置包括降压斩波电路和被配置为控制降压斩波电路的控制器。 控制器被配置为以固定的频率打开和关闭降压斩波电路中的低侧开关装置。 所述控制器包括被配置为确定参考电压值的操作单元，被配置为输出由所述操作单元确定的所述参考电压值与与电流流动成比例的电压的平均值作为差分信号的输出单元 以及控制电路，被配置为确定开关装置的接通时间段。 该控制电路包括一个振荡器，该振荡器配置成产生一个像锯齿形的电压信号。 控制电路被配置为基于电压信号和差分信号来确定开关装置的接通时间周期。
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Patent Agency Ranking
公开(公告)号：US20150207412A1
公开(公告)日：2015-07-23
申请号：US14417714
申请日：2013-07-26
Inventor： Kazuhiro Kumada
IPC: H02M3/158
CPC classification number: H02M3/1584 , H02H9/002 , H02M3/155 , H02M2003/1586 , H05B33/0818 , Y02B20/346
Abstract: The power supply device of the present invention includes a main converter and at least one sub converter connected in parallel between a pair of output ends of a DC power supply circuit for receiving power through a parallel circuit of a thyristor and a thermistor having a positive temperature coefficient. Each of the main converter and the at least one sub converter includes: a series circuit composed of a diode and a switching element and connected between the pair of output ends; a series circuit composed of a capacitor and an inductor and connected in parallel with the diode; and a drive circuit configured to drive the switching element. The main converter controls the thyristor in accordance with a voltage across a secondary winding magnetically coupled with the inductor. When a short circuit of the switching element of the at least one sub converter occurs, the drive circuit of the main converter terminates driving of the switching element of the main converter.
Abstract translation: 本发明的电源装置包括主转换器和至少一个副转换器，并联在直流电源电路的一对输出端之间，用于通过晶闸管的并联电路和具有正温度的热敏电阻来接收电力 系数。 主转换器和至少一个子转换器中的每一个包括：串联电路，由二极管和开关元件组成并连接在该对输出端之间; 由电容器和电感器组成的串联电路并联二极管; 以及配置为驱动所述开关元件的驱动电路。 主转换器根据与电感器磁耦合的次级绕组上的电压来控制晶闸管。 当发生至少一个子转换器的开关元件的短路时，主转换器的驱动电路终止主转换器的开关元件的驱动。
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公开(公告)号：US20180160495A1
公开(公告)日：2018-06-07
申请号：US15829888
申请日：2017-12-02
Inventor： Shinichi MURAKAMI , Kazuhiro Kumada , Ryuhei Hayashi
IPC: H05B33/08
CPC classification number: H05B33/0845 , F21S8/00 , F21S8/026 , F21V23/001 , F21W2131/406 , F21Y2115/10 , F21Y2115/20 , H05B33/0812 , H05B33/0815
Abstract: A lighting device includes: a variable voltage source; a transistor which controls a current flowing through a light-emitting element; and a control circuit which causes the transistor to pass a current corresponding to a received instruction for a dimming level through the light-emitting element. When the received instruction instructs at least a predetermined dimming Level, the control circuit causes a voltage drop in the transistor to become a first voltage by controlling the variable voltage source, and when the received instruction instructs a dimming level less than the predetermined dimming level, the control circuit causes the voltage drop to become a second voltage higher than the first voltage, by controlling the variable voltage source.
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公开(公告)号：US09655194B2
公开(公告)日：2017-05-16
申请号：US14741845
申请日：2015-06-17
Inventor： Kazuhiro Kumada , Koji Uenoyama , Miyo Kangyo
IPC: H05B33/08
CPC classification number: H05B33/086 , H05B33/0818
Abstract: The lighting control device according to the present invention includes: a power supply for operating a light source including a first light source and a second light source lower in color temperature than the first light source; and a controller for controlling the power supply. The power supply includes: a first power supply for supplying power in a first range to the first light source; and a second power supply for supplying power in a second range to the second light source. The controller controls the first and second power supplies to adjust power supplied to the first light source and power supplied to the second light source so that a color temperature of the light source is equal to a color temperature which is selected from a predetermined color adjustment range as a desired value. The first range is lower in a lower limit than the second range.
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公开(公告)号：US09521717B2
公开(公告)日：2016-12-13
申请号：US15044634
申请日：2016-02-16
Inventor： Miyo Kangyo , Koji Watanabe , Kazuhiro Kumada , Shinichi Murakami
CPC classification number: H05B33/0815 , H05B33/0845 , H05B33/0887 , H05B33/089 , H05B37/02 , Y02B20/346
Abstract: When supplying an LED light source with a first output voltage that is equal to or higher than a threshold voltage, an LED driver causes a DC power supply to output a first DC voltage and causes a switching regulator to supply the LED light source with the first output voltage. When supplying the LED light source with a second output voltage that is below the threshold voltage, the LED driver causes the DC power supply to output a second DC voltage lower than the first DC voltage and causes the dropper regulator to supply the LED light source with the second output voltage.
Abstract translation: 当提供等于或高于阈值电压的第一输出电压的LED光源时，LED驱动器使直流电源输出第一直流电压，并使开关调节器向第一 输出电压。 当将LED光源提供低于阈值电压的第二输出电压时，LED驱动器使直流电源输出低于第一直流电压的第二直流电压，并使滴管调节器向LED光源提供 第二个输出电压。
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公开(公告)号：US09350248B2
公开(公告)日：2016-05-24
申请号：US14417714
申请日：2013-07-26
Inventor： Kazuhiro Kumada
CPC classification number: H02M3/1584 , H02H9/002 , H02M3/155 , H02M2003/1586 , H05B33/0818 , Y02B20/346
Abstract: The power supply device of the present invention includes a main converter and at least one sub converter connected in parallel between a pair of output ends of a DC power supply circuit for receiving power through a parallel circuit of a thyristor and a thermistor having a positive temperature coefficient. Each of the main converter and the at least one sub converter includes: a series circuit composed of a diode and a switching element and connected between the pair of output ends; a series circuit composed of a capacitor and an inductor and connected in parallel with the diode; and a drive circuit configured to drive the switching element. The main converter controls the thyristor in accordance with a voltage across a secondary winding magnetically coupled with the inductor. When a short circuit of the switching element of the at least one sub converter occurs, the drive circuit of the main converter terminates driving of the switching element of the main converter.
Abstract translation: 本发明的电源装置包括主转换器和至少一个副转换器，并联在直流电源电路的一对输出端之间，用于通过晶闸管的并联电路和具有正温度的热敏电阻来接收电力 系数。 主转换器和至少一个子转换器中的每一个包括：串联电路，由二极管和开关元件组成并连接在该对输出端之间; 由电容器和电感器组成的串联电路并联二极管; 以及配置为驱动所述开关元件的驱动电路。 主转换器根据与电感器磁耦合的次级绕组上的电压来控制晶闸管。 当发生至少一个子转换器的开关元件的短路时，主转换器的驱动电路终止主转换器的开关元件的驱动。
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