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公开(公告)号：US09775202B2
公开(公告)日：2017-09-26
申请号：US14824590
申请日：2015-08-12
发明人： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara
CPC分类号： H05B33/0815 , H01L29/1608 , H02M1/42 , H02M3/33523 , H05B33/0812 , H05B33/0851 , H05B33/0896
摘要： Lighting apparatus which supplies a current to solid-state light-emitting device (LED) includes: DC power supply circuit (AC/DC converter); and DC/DC converter that converts an output voltage of DC power supply circuit and applies, to solid-state light-emitting device, the output voltage converted. DC/DC converter includes: switching element; and DC/DC control circuit that performs a control of repeatedly turning ON and OFF switching element in a boundary conduction mode, and DC power supply circuit adjusts the output voltage to make a switching frequency of switching element higher than a first frequency, based on a forward voltage to be applied to solid-state light-emitting device.
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公开(公告)号：US09380667B2
公开(公告)日：2016-06-28
申请号：US14743539
申请日：2015-06-18
发明人： Shigeru Ido , Hiroshi Kido , Akinori Hiramatu , Takeshi Kamoi , Katsushi Seki , Daisuke Yamahara , Daisuke Ueda
CPC分类号： H05B33/083 , H05B33/0809 , H05B33/089 , H05B37/02
摘要： An illumination device includes a main light source block having a plurality of main light sources and a plurality of current limiters, and an auxiliary light source block having an auxiliary light source and a constant-current unit. A series circuit of the auxiliary light source and the constant-current unit is electrically connected in parallel with the main light source block, between first and second output terminals of a rectifier. A smoothing capacitor is electrically connected in parallel with a specific main light source among the plurality of main light sources. The specific main light source and a corresponding current limiter are electrically connected in parallel with the series circuit of the auxiliary light source and the constant-current unit.
摘要翻译： 照明装置包括具有多个主光源和多个限流器的主光源块，以及具有辅助光源和恒流单元的辅助光源块。 辅助光源和恒流单元的串联电路在整流器的第一和第二输出端子之间与主光源块并联电连接。 平滑电容器与多个主光源中的特定主光源并联地电连接。 特定主光源和对应的限流器与辅助光源和恒流单元的串联电路并联电连接。
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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：US09374864B2
公开(公告)日：2016-06-21
申请号：US14734566
申请日：2015-06-09
发明人： Takeshi Kamoi , Akinori Hiramatu , Hiroshi Kido , Katsushi Seki , Shigeru Ido , Daisuke Yamahara , Daisuke Ueda
CPC分类号： H05B33/083
摘要： A controller circuit is configured to adjust the number of light-emitting diodes that a current flows from a rectifier circuit through so that: the number of light-emitting diodes, which are lit, of the plurality of light-emitting diodes increases according to a value of a pulsating voltage during a time period that the value of the pulsating voltage increases; and the number of light-emitting diodes, which are lit, of the plurality of light-emitting diodes decreases according to the value of the pulsating voltage during a time period that the value of the pulsating voltage decreases. Light-emitting diodes, which start to emit light by a higher voltage value, of the plurality of light-emitting diodes are disposed at a position nearer to an outside of a mounting region of a substrate than light-emitting diodes, which start to emit light by a lower voltage value, of the plurality of light-emitting diodes.
摘要翻译： 控制器电路被配置为调节电流从整流电路流过的发光二极管的数量，使得：多个发光二极管的发光二极管的数量根据 在脉动电压值增加的时间段内脉动电压的值; 并且多个发光二极管中发光二极管的数量根据脉动电压值减小的时间段内的脉动电压的值而减小。 多个发光二极管开始发射较高电压值的发光二极管被设置在比开始发射的发光二极管更靠近基板的安装区域的外侧的位置 在多个发光二极管中通过较低的电压值进行光照射。
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公开(公告)号：US09706615B2
公开(公告)日：2017-07-11
申请号：US15134759
申请日：2016-04-21
发明人： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara , Shun Kusuda
CPC分类号： H05B33/0815 , H02M1/32 , H02M1/4208 , H02M3/156 , H02M2001/0009 , H02M2003/1557 , H05B33/0851 , Y02B70/126
摘要： A lighting device which outputs a current to a solid-state light emitting element includes: a direct current-to-direct current (DC-to-DC) converter; and an output detector which detects an output from the DC-to-DC converter, wherein the DC-to-DC converter includes: a switching element; a control device which controls the switching element in order to generate the output; and a current detector which detects a current which flows through the switching element, and if a current value of the current detected by the current detector is less than a predetermined threshold, the control device controls the switching element according to a duty cycle determined based on an output value of the output detected by the output detector, and if the current value is greater than the predetermined threshold, the control device controls the switching element according to a duty cycle lower than the duty cycle determined based on the output value.
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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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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：US09723665B2
公开(公告)日：2017-08-01
申请号：US14822054
申请日：2015-08-10
发明人： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara
CPC分类号： H05B33/0815 , H02M3/33546 , H05B37/0227 , Y02B20/346
摘要： Lighting apparatus includes: AC/DC converter which converts AC voltage Vac to DC voltage Vdc; DC/DC converter which converts DC voltage Vdc to a DC voltage to be applied to LED; and detection circuit which detects AC voltage Vac. DC/DC converter includes switching element, and control circuit that performs a control of repeatedly turning on and off switching element in a boundary conduction mode. Control circuit performs the control under which ON time Ton is kept from exceeding an upper limit that is previously determined, and raises the upper limit when AC voltage Vac detected by detection circuit falls below a predetermined value. ON time Ton is a period of time during which switching element is kept ON.
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公开(公告)号：US09374865B2
公开(公告)日：2016-06-21
申请号：US14796287
申请日：2015-07-10
发明人： Daisuke Yamahara , Takeshi Kamoi , Hiroshi Kido , Akinori Hiramatu , Katsushi Seki , Daisuke Ueda , Shigeru Ido
CPC分类号： H05B33/083 , H05B33/0809
摘要： A lighting device includes a rectifier, a constant current regulator and a charge-discharge circuit. The constant current regulator is electrically connected in series with first and second solid-state light-emitting element arrays between a pair of output terminals of the rectifier. The constant current regulator is configured to adjust a current flowing through the second solid-state light-emitting element array to a constant current. The charge-discharge circuit is electrically connected in series with the first solid-state light-emitting element array between the pair of output terminals of the rectifier. The charge-discharge circuit includes a charge storage element, and is configured so that a charge current flows to the charge storage element through the first solid-state light-emitting element array, and so that a discharge current flows from the charge storage element to the second solid-state light-emitting element array.
摘要翻译： 照明装置包括整流器，恒流调节器和充放电电路。 恒流调节器与整流器的一对输出端之间的第一和第二固态发光元件阵列串联电连接。 恒流调节器被配置为将流过第二固态发光元件阵列的电流调节到恒定电流。 充放电电路与整流器的一对输出端子之间的第一固态发光元件阵列串联电连接。 充放电电路包括电荷存储元件，并且被配置为使得充电电流通过第一固态发光元件阵列流到电荷存储元件，并且使得放电电流从电荷存储元件流到 第二固态发光元件阵列。
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公开(公告)号：US09414451B2
公开(公告)日：2016-08-09
申请号：US14572990
申请日：2014-12-17
发明人： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara
CPC分类号： H05B33/0818
摘要： A lighting device includes a constant-current circuit, a smoothing capacitor, a bypass circuit, a detection unit, and a bypass control unit. The constant-current circuit supplies a constant current to a plurality of solid-state light-emitting elements connected in series. The smoothing capacitor is connected between output terminals of the constant-current circuit. The bypass circuit is connected in parallel to one or more of the plurality of solid-state light-emitting elements. The detection unit detects whether the one or more solid-state light-emitting elements are open-circuited. When the detection unit detects that at least one of the one or more solid-state light-emitting elements is open-circuited, the bypass control unit discharges the smoothing capacitor during a discharge period to then bypass the one or more solid-state light-emitting elements through the bypass circuit.
摘要翻译： 照明装置包括恒流电路，平滑电容器，旁路电路，检测单元和旁路控制单元。 恒流电路向串联连接的多个固态发光元件供给恒定电流。 平滑电容连接在恒流电路的输出端子之间。 旁路电路与多个固态发光元件中的一个或多个并联连接。 检测单元检测一个或多个固态发光元件是否开路。 当检测单元检测到一个或多个固态发光元件中的至少一个是开路时，旁路控制单元在放电期间对平滑电容器进行放电，从而绕过一个或多个固态发光元件， 通过旁路电路发射元件。
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