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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：US09623791B2
公开(公告)日：2017-04-18
申请号：US15204538
申请日：2016-07-07
Inventor： Takahiro Fukui , Masaaki Takamatsu , Kazuya Kato
IPC: H05B37/02 , B60Q1/14 , H05B33/08 , F21S8/10 , F21Y115/10
CPC classification number: B60Q1/1407 , B60Q1/0094 , B60Q1/1446 , F21S41/143 , F21S41/147 , F21S41/255 , F21S41/321 , F21S41/60 , F21S41/663 , F21Y2115/10 , H05B33/0815 , H05B33/083 , H05B33/0845
Abstract: The lighting device includes a control circuit performing dimming control of dimming a light source device according to a desired dimming level. In the dimming control, the control circuit sets a desired current value of amplitude control to a value corresponding to the desired dimming level, and set a desired duty cycle of pulse width modulation control to a predetermined value associated with a dimming subrange containing the desired dimming level, of multiple different dimming subranges of a total dimming range of the light source device. The predetermined value is a duty cycle allowing luminance of the light source device to be equal to upper limit luminance of the associated dimming subrange under a condition where the current value of the current of the light source device is a maximum value.
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公开(公告)号：US09585234B2
公开(公告)日：2017-02-28
申请号：US15014216
申请日：2016-02-03
Inventor： Kazuya Kato
IPC: H05B41/16 , H05B41/292 , H01J61/54 , H05B41/288
CPC classification number: H05B41/2926 , H01J61/54 , H05B41/2887 , Y02B20/202
Abstract: The lighting device of one aspect according to the present disclosure calculates, based on a voltage value of an AC voltage applied to a discharge lamp and a current value of AC current flowing through the discharge lamp, a first power value defined as a value of power supplied to the discharge lamp in a first half period of the AC voltage and a second power value defined as a value of power supplied to the discharge lamp in a second half period of the AC voltage. The lighting device determines that a ground fault has occurred, when an imbalance state in which a difference between the first power value and the second power value is equal to or greater than a threshold value continues for a predetermined time period.
Abstract translation: 根据本公开的一个方面的照明装置基于施加到放电灯的AC电压的电压值和流过放电灯的AC电流的电流值来计算定义为功率值的第一功率值 在交流电压的前半个周期中提供给放电灯，以及在交流电压的后半个周期中被定义为提供给放电灯的功率值的第二功率值。 当第一功率值和第二功率值之间的差等于或大于阈值的不平衡状态持续预定时间段时，照明装置确定发生接地故障。
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公开(公告)号：US09220160B2
公开(公告)日：2015-12-22
申请号：US14646581
申请日：2013-10-17
Inventor： Masahiro Nishikawa , Masatoshi Ueno , Kazuya Kato , Masashi Kichima
IPC: H05B37/02 , H05B41/24 , H05B41/36 , H05B41/292 , H05B41/288
CPC classification number: H05B41/2926 , H05B41/2886 , H05B41/2887 , H05B41/2925
Abstract: Control unit decreases power to be supplied to high-pressure discharge lamp when an output voltage or an output current for high-pressure discharge lamp measured by measurement unit is in an abnormal range. Drive unit driving switching element includes capacitor that supplies, to a control electrode of switching element disposed on high potential side, electric charge necessary for turning on switching element disposed on high potential side when switching element disposed on low potential side is turned off. When high-pressure discharge lamp is started up, a discharge lamp lighting device starts to charge capacitor before DC/DC converter is started to operate, and control unit has a determination period for determining presence/absence of an abnormality based on a measured value acquired by measurement unit in a state in which DC/DC converter and DC/AC inverter are operated after completion of charging of capacitor.
Abstract translation: 当由测量单元测量的高压放电灯的输出电压或输出电流处于异常范围时，控制单元降低供应给高压放电灯的功率。 驱动单元驱动开关元件包括电容器，其将设置在高电位侧的开关元件的控制电极提供给设置在低电位侧的开关元件断开时用于接通设置在高电位侧的开关元件所需的电荷。 当高压放电灯启动时，在DC / DC转换器开始运行之前，放电灯点亮装置开始对电容器充电，并且控制单元具有基于所获得的测量值来确定异常的存在/不存在的确定周期 由DC / DC转换器和DC / AC变换器在电容器充电完成后进行动作的状态。
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Patent Agency Ranking
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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公开(公告)号：US10889244B2
公开(公告)日：2021-01-12
申请号：US15240305
申请日：2016-08-18
Inventor： Masatoshi Ueno , Masaaki Takamatsu , Toshiaki Sasaki , Kazuya Kato
Abstract: The lighting control device includes a controller, a diagnosis circuit, a latch circuit, and a logic circuit. The controller outputs a control signal. The diagnosis circuit outputs an irregular signal. The latch circuit decides a state of a forcibly lighting signal. The logic circuit controls a light source in accordance with an ignition signal, the control signal, and the forcibly lighting signal. The logic circuit turns on the light source in accordance with the ignition signal while receiving the forcibly lighting signal, and turns on the light source in accordance with the control signal while not receiving the forcibly lighting signal.
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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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