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公开(公告)号：US20180352627A1
公开(公告)日：2018-12-06
申请号：US15984389
申请日：2018-05-20
Inventor： Keisuke SEKI , Shigeru IDO , Kazuhiko HAYASHI
Abstract: An illuminating apparatus includes a first light emitter, a second light emitter which emits light including more predefined color components than light emitted by the first light emitter, and a lighting device which supplies current modulated according to a visible light communication signal, to the first light emitter. The lighting device supplies a constant current to the second light emitter, while the first light emitter is supplied with current.
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公开(公告)号：US20180220504A1
公开(公告)日：2018-08-02
申请号：US15869439
申请日：2018-01-12
Inventor： Keisuke SEKI
IPC: H05B33/08 , G09F13/00 , H04B10/116
CPC classification number: H05B33/0845 , F21S8/02 , F21S8/038 , F21V23/008 , F21Y2115/10 , G09F13/005 , G09F13/04 , H04B10/116 , H05B33/0815
Abstract: A lighting device which supplies a light-emitting element with a current modulated based on a visible light communication signal includes: a DC power supply circuit which supplies the light-emitting element with a first voltage that is a DC voltage; and a current control circuit which (i) includes a current control element connected in series to the light-emitting element, (ii) switches the current control element between a first state and a second state based on the visible light communication signal, the first state and the second state differing in electrical impedance, and (iii) adjusts, to a constant current value corresponding to a constant current instruction signal, a current flowing through the light-emitting element in a period in which the current control element is in the first state, by controlling the current control element.
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Patent Agency Ranking
公开(公告)号：US20170171936A1
公开(公告)日：2017-06-15
申请号：US15371704
申请日：2016-12-07
Inventor： Keisuke SEKI
IPC: H05B33/08
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：US20190268992A1
公开(公告)日：2019-08-29
申请号：US16411976
申请日：2019-05-14
Inventor： Keisuke SEKI , Shigeru IDO , Kazuhiko HAYASHI
Abstract: An illuminating apparatus includes a first light emitter, a second light emitter which emits light including more predefined color components than light emitted by the first light emitter, and a lighting device which supplies current modulated according to a visible light communication signal, to the first light emitter. The lighting device supplies a constant current to the second light emitter, while the first light emitter is supplied with current.
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公开(公告)号：US20180338364A1
公开(公告)日：2018-11-22
申请号：US15981553
申请日：2018-05-16
Inventor： Shigeru IDO , Keisuke SEKI , Kazuhiko HAYASHI
CPC classification number: H05B33/0887 , G09F13/04
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：US20180219625A1
公开(公告)日：2018-08-02
申请号：US15877582
申请日：2018-01-23
Inventor： Keisuke SEKI
IPC: H04B10/116 , G05F1/575 , H05B33/08 , H01L31/02
CPC classification number: H04B10/116 , G05F1/575 , H01L31/02024 , H05B33/0815 , H05B33/0887
Abstract: A lighting device includes: a DC power supply circuit which supplies a light-emitting element with a first voltage; a signal generation circuit which generates a control signal based on a visible light communication signal; a current control element which is connected in series to the light-emitting element and turned on and off based on the control signal; a DC power supply control circuit which causes a second voltage at a first node between the light-emitting element and the current control element to be a constant value, by controlling the DC power supply circuit based on the second voltage; and a first feedback circuit which supplies the DC power supply control circuit with the second voltage. The first feedback circuit supplies the DC power supply control circuit with a predetermined voltage in a period in which the current control element is off.
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公开(公告)号：US20160150611A1
公开(公告)日：2016-05-26
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.
Abstract translation: 照明装置包括整流电路，转换电路，恒流电路和控制电路。 该转换电路包括第一串联电路，第二串联电路和第三串联电路。 转换电路被配置为通过由控制电路控制的开关元件的导通/截止来输出DC电流。 第三电容器的高电位侧端子与输出端子电连接。 第三电容器的低电位侧端子经由恒流电路与输出端子电连接。
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