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公开(公告)号：US10231312B2
公开(公告)日：2019-03-12
申请号：US15694821
申请日：2017-09-03
Inventor： Kazuya Kato , Toshiaki Nakamura , Akihiro Kishimoto , Kenichi Fukuda
Abstract: In a lighting device, when determining that both of a first measuring value and a second measuring value are not an abnormal value, a controller is configured to control an output of a power converter based on the first and second measuring values. The first measuring value is a temperature inside a main body of the lighting device, sensed by a first temperature sensor. The second measuring value is a temperature of a light source, sensed by a second temperature sensor. When determining that at least one of the first and second measuring values is the abnormal value, the controller is configured to control the output of the power converter to another value that is different from a value of the output set based on the first and second measuring values.
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公开(公告)号：US09376056B2
公开(公告)日：2016-06-28
申请号：US14438623
申请日：2013-10-29
Inventor： Masatoshi Ueno , Toshiaki Nakamura , Kazuya Kato , Masashi Kichima , Masahiro Nishikawa
IPC: H05B37/02 , H05B39/04 , H05B41/16 , B60Q3/00 , H02M7/48 , H02H3/24 , H02H7/122 , H02H3/16 , H02M3/155 , H02M1/00 , G01R31/02
CPC classification number: B60Q3/00 , G01R31/025 , H02H3/16 , H02H3/243 , H02H7/122 , H02H7/1225 , H02M3/155 , H02M7/48 , H02M2001/007
Abstract: A power supply device includes a DC power supply circuit configured to output DC power, and a ground-fault determining circuit configured to determine presence or absence of a ground fault at a post-stage of the DC power supply circuit. The ground-fault determining circuit includes a capacitor having an end that is connected with ground, and a diode including an anode and a cathode. The anode is connected with another end of the capacitor, and the cathode is connected with an output end on a high voltage side of the DC power supply circuit. The ground-fault determining circuit further includes a constant voltage source configured to charge the capacitor with a prescribed charging voltage, and a comparator as a determining portion configured to determine presence of the ground fault when a voltage across the capacitor falls below a prescribed determination reference voltage lower than the prescribed charging voltage.
Abstract translation: 电源装置包括：配置为输出直流电力的直流电源电路;以及接地故障判定电路，被配置为确定直流电源电路的后级的接地故障的存在与否。 接地故障确定电路包括具有与地连接的端部的电容器和包括阳极和阴极的二极管。 阳极与电容器的另一端连接，阴极与直流电源电路的高压侧的输出端连接。 接地故障判定电路还包括被配置为以规定的充电电压对电容器充电的恒定电压源，以及作为确定部分的比较器，其被配置为当电容器两端的电压低于规定的确定基准时确定接地故障的存在 电压低于规定的充电电压。
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Patent Agency Ranking
公开(公告)号：US10477643B2
公开(公告)日：2019-11-12
申请号：US15675250
申请日：2017-08-11
Inventor： Toshiaki Nakamura , Kazuya Kato , Kenichi Fukuda , Akihiro Kishimoto
Abstract: An impedance adjustment circuit varies an impedance of a transistor, thereby adjusting an impedance of a current path. A second control circuit controls a drive circuit to turn on or off at least one switch device of the switch devices while the impedance adjustment circuit is increasing the impedance of the current path. The impedance adjustment circuit adjusts the impedance of the current path to the minimum value after the drive circuit switches the at least one switch device from off to on or from on to off.
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公开(公告)号：US09884582B2
公开(公告)日：2018-02-06
申请号：US15479411
申请日：2017-04-05
Inventor： Kazuya Kato , Toshiaki Nakamura , Akihiro Kishimoto , Kenichi Fukuda , Masaaki Takamatsu
CPC classification number: B60Q1/143 , B60Q1/0023 , B60Q1/0035 , B60Q1/0041 , B60Q1/0094 , B60Q2300/146 , F21S41/141 , F21S41/148 , F21S41/19 , F21S41/20 , F21S41/255 , F21S41/285 , F21S41/321 , F21S41/39 , F21Y2115/10 , H05B33/0854 , H05B33/089
Abstract: A lighting device includes a thermal sensor, power converter circuits and a control circuit. The thermal sensor is configured to measure an internal temperature of a case. The power converter circuits are housed in the case and configured to be connected with different types of light sources, respectively. The control circuit is housed in the case and has priorities that are provided with respect to the different types of light sources according to their respective types. The control circuit is configured to, when the internal temperature is greater than a threshold, control the respective outputs of the power converter circuits so as to preferentially decrease an output for a light source corresponding to a first priority.
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5.发明授权Lighting device, light source device, illuminating device, and vehicular headlight 有权照明装置，光源装置，照明装置和车辆头灯公开(公告)号：US09474114B2
公开(公告)日：2016-10-18
申请号：US14795186
申请日：2015-07-09
Inventor： Toshiaki Nakamura
CPC classification number: H05B33/0815 , B60Q1/1415 , H05B33/0809 , H05B33/0842
Abstract: The lighting device according to the present invention is used for lighting a light source device. The light source device includes a light source unit connected between first and second power supply terminals and a first impedance device which has an impedance associated with an electric property of the light source unit and is connected to the second power supply terminal. The lighting device performs a first process and a second process. In the first process, the lighting device obtains a measurement indicative of the impedance by supplying power to the first impedance device via the second power supply terminal while prohibiting output of DC power for lighting, and determine an operating condition based on the measurement. In the second process, the lighting device operates so that the DC power for lighting satisfies the operating condition.
Abstract translation: 根据本发明的照明装置用于点亮光源装置。 光源装置包括连接在第一和第二电源端子之间的光源单元和具有与光源单元的电气特性相关联并且连接到第二电源端子的阻抗的第一阻抗装置。 照明装置执行第一处理和第二处理。 在第一过程中，照明装置通过经由第二电源端子向第一阻抗装置供电而获得表示阻抗的测量值，同时禁止用于照明的DC电力的输出，并且基于测量来确定操作条件。 在第二过程中，照明装置工作，使得用于照明的DC电力满足操作条件。
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公开(公告)号：US10009970B2
公开(公告)日：2018-06-26
申请号：US15681053
申请日：2017-08-18
Inventor： Akihiro Kishimoto , Toshiaki Nakamura , Kenichi Fukuda , Kazuya Kato
CPC classification number: H05B33/0815 , B60Q1/0041 , B60Q1/0094 , B60Q1/04 , B60Q1/1415 , B60Q1/1423 , H02M3/33507 , H02M3/33523 , H05B33/0845 , H05B33/0851
Abstract: A power supply device includes converters, a command circuit, and a setter. The converters correspond to loads. The command circuit controls the converters. The setter sets a magnitude of an output of at least one target converter of the converters in accordance with an output characteristic representing a relationship between an input voltage of the at least one target converter and an output limit value which is an upper limit value of the output from the at least one target converter. The output characteristic is a characteristic that the output limit value decreases as the input voltage lowers when the input voltage is lower than a threshold. The setter varies the threshold of the output characteristic in accordance with an operation status of the converters and sets the magnitude of the output from the at least one target converter in accordance with the output characteristic whose threshold has been varied.
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公开(公告)号：US09961741B2
公开(公告)日：2018-05-01
申请号：US15194687
申请日：2016-06-28
Inventor： Toshiaki Nakamura
CPC classification number: H05B33/0887 , H02H11/003 , H05B33/0815
Abstract: In a circuit device, a plurality of protection circuits are disposed between a plurality of first power supply connecting terminals and a first input terminal of a load circuit. A switching element of each of the plurality of protection circuits is connected between a first power supply connecting terminal and a first input terminal, and is turned on when a DC power supply is connected with a normal polarity to the first power supply connecting terminal. Each of the plurality of protection circuits a parasitic diode that is connected in parallel to the switching element between a corresponding first power supply connecting terminal and a first input terminal in a direction where a current having a normal polarity is caused to flow. The reset circuit performs periodically a reset operation of temporarily turning off the switching element.
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