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公开(公告)号：US10439719B2
公开(公告)日：2019-10-08
申请号：US15984368
申请日：2018-05-20
Inventor： Keisuke Seki , Shigeru Ido , Kazuhiko Hayashi
IPC: H04B10/116 , H05B33/08 , H05B37/02 , H02M3/335 , H02M1/42 , H02M3/156 , H02M1/14 , H04B10/50 , H02M1/00
Abstract: A lighting device includes: a constant current supply circuit; and a first modulation circuit and a second modulation circuit that are connected in series between output terminals of the constant current supply circuit. The first modulation circuit includes a first capacitor that is connected in parallel to the first modulation circuit. The second modulation circuit includes a second capacitor that is connected in parallel to the second modulation circuit.
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公开(公告)号：US09807837B2
公开(公告)日：2017-10-31
申请号：US15371583
申请日：2016-12-07
Inventor： Keisuke Seki
IPC: H05B33/00 , H05B33/08 , F21Y115/10 , F21V23/00
CPC classification number: H05B33/0845 , F21V23/001 , F21V23/009 , F21Y2115/10 , H05B33/0827 , H05B33/0857 , H05B33/0866 , H05B33/0887
Abstract: A light-emitting apparatus includes: a light source unit to which constant current corresponding to a dimming level is supplied from a constant current supply (dimming LED driver), and which includes a first light-emitting element column and a second light-emitting element column connected in parallel with the first light-emitting element column; a first detector circuit (resistor) which is connected in series to the first light-emitting element column, and detects a magnitude of a current flowing through the first light-emitting element column; a current adjuster circuit which adjusts a relationship of the magnitude of the current flowing through the first light-emitting element column to the constant current, based on the magnitude of the detected current; and a relationship adjuster circuit (variable resistor) which adjusts the dimming level at a changing point where a relationship of the magnitude of the current flowing through the first light-emitting element column to the dimming level changes.
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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
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.
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公开(公告)号：US10278258B2
公开(公告)日：2019-04-30
申请号：US15981553
申请日：2018-05-16
Inventor： Shigeru Ido , Keisuke Seki , Kazuhiko Hayashi
Abstract: A lighting device is a device that is for supplying current to an LED unit, is connected to a constant current source having output terminals to which a capacitor is connected, and includes: a transistor connected in parallel with the capacitor and connected in series with the LED unit; a modulation circuit (a microcomputer of a modulator, etc.) that causes the transistor to switch ON and OFF based on a signal for visible light communication; and a constant current control circuit that maintains a current flowing through the transistor at a constant current when the current flowing through the transistor is greater than a first predetermined value.
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公开(公告)号：US09585223B2
公开(公告)日：2017-02-28
申请号：US14988212
申请日：2016-01-05
Inventor： Keisuke Seki , Akinori Hiramatsu , Hiroshi Kido
IPC: H05B33/08
CPC classification number: H05B33/0887 , H05B33/0827 , H05B33/0851 , H05B33/0866
Abstract: An illumination system includes: a first light-emitting element column in which one or more first light-emitting elements are serially connected; a second light-emitting element column connected in parallel with the first light-emitting element column, and in which one or more second light-emitting elements are serially connected; a constant current supply that supplies constant current to a light source unit including the first and second light-emitting element columns; a resistor that is connected in series with the first light-emitting element column, and detects magnitude of current flowing through at least the first light-emitting element column; a bypass circuit that passes, to the resistor, at least part of current flowing through the second light-emitting element column, when a predetermined condition is satisfied; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the resistor.
Abstract translation: 照明系统包括：第一发光元件列，其中一个或多个第一发光元件串联连接; 与第一发光元件列并联连接的第二发光元件列，其中一个或多个第二发光元件串联连接; 恒定电流源，其向包括第一和第二发光元件列的光源单元提供恒定电流; 与第一发光元件列串联连接的电阻，并检测流过至少第一发光元件列的电流的大小; 当满足预定条件时，将电流流过流经第二发光元件列的电流的至少一部分的旁路电路; 以及电流调节器电路，其根据由电阻器检测的电流的大小来调节流过第一发光元件列的电流的大小。
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Patent Agency Ranking
公开(公告)号：US09414451B2
公开(公告)日：2016-08-09
申请号：US14572990
申请日：2014-12-17
Inventor： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara
CPC classification number: H05B33/0818
Abstract: 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.
Abstract translation: 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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7.发明授权公开(公告)号：US10237935B2
公开(公告)日：2019-03-19
申请号：US15596478
申请日：2017-05-16
Inventor： Keisuke Seki
IPC: H05B37/02 , H05B33/08 , F21V19/00 , F21Y115/10 , F21S8/02
Abstract: An emission control device includes: a switching circuit for switching which light-emitting element or light-emitting elements from among a plurality of light-emitting elements is supplied with current; a detection circuit which detects current or voltage supplied from a DC-power supply circuit; and a control circuit which controls the switching circuit to switch which of the light-emitting element or light-emitting elements from among the plurality of light-emitting elements is supplied with the current when a power switch is turned from on to off and back to on within a predefined period and the current or the voltage detected by the detection circuit is less than when the power switch is on.
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公开(公告)号：US09974140B2
公开(公告)日：2018-05-15
申请号：US15371704
申请日：2016-12-07
Inventor： Keisuke Seki
IPC: H05B37/02 , H05B33/08 , F21Y115/10 , F21V23/00 , F21S8/02
CPC classification number: H05B33/0866 , F21S8/02 , F21V23/009 , F21Y2115/10 , H05B33/0815 , H05B33/0827
Abstract: A light-emitting device includes: a first light-emitting element array including one of a single first light-emitting element or a plurality of first light-emitting elements connected in series, and having a first emission color; a second light-emitting element array including one of a single second light-emitting element or a plurality of second light-emitting elements connected in series, and having a second emission color different from the first emission color, the second light-emitting element array being connected to the first light-emitting element array in parallel; and a third light-emitting element array including one of a single third light-emitting element or a plurality of third light-emitting elements connected in series, and having a third emission color different from the first emission color and the second emission color, the third light-emitting element array being connected to the first light-emitting element array and the second light-emitting element array in series.
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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
Inventor： Keisuke Seki , Takeshi Kamoi , Daisuke Yamahara
CPC classification number: H05B33/0815 , H01L29/1608 , H02M1/42 , H02M3/33523 , H05B33/0812 , H05B33/0851 , H05B33/0896
Abstract: 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：US09674918B2
公开(公告)日：2017-06-06
申请号：US14988182
申请日：2016-01-05
Inventor： Keisuke Seki , Akinori Hiramatsu , Hiroshi Kido
IPC: H05B33/08
CPC classification number: H05B33/0866 , H05B33/0827 , H05B33/086
Abstract: An illumination system includes: a first light-emitting element column including one of a single first light-emitting element or a plurality of first light-emitting elements connected in series; a second light-emitting element column connected in parallel with the first light-emitting element column, and including one of a single second light-emitting element or a plurality of second light-emitting elements connected in series; a constant current supply that supplies a constant current to the first light-emitting element column and the second light-emitting element column which are connected in parallel; a resistor that is connected in series with the first light-emitting element column, and detects a magnitude of current flowing through the first light-emitting element column; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the resistor.
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