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公开(公告)号：US10708989B2
公开(公告)日：2020-07-07
申请号：US16329440
申请日：2017-08-29
摘要： A control unit controls a bidirectional switch so as to turn the switch from ON to OFF when an amount of time, varying according to a lighting level, passes since a starting point of a half cycle of an AC voltage. When a voltage between both terminals of a capacitive element, connected to a control terminal of the bidirectional switch, becomes equal to or greater than a threshold voltage, the bidirectional switch turns from OFF to ON A first charging/discharging regulator circuit and a second charging/discharging regulator circuit each make a rate of fall of the voltage between both of the terminals of the capacitive element when the bidirectional switch turns from ON to OFF lower than a rate of rise of the voltage between both of the terminals of the capacitive element when the bidirectional switch turns from OFF to ON.
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公开(公告)号：US10165642B2
公开(公告)日：2018-12-25
申请号：US15740370
申请日：2016-06-28
IPC分类号： H05B33/08 , H05B37/02 , H02M1/08 , H03K17/0412 , H03K17/687 , H02M7/25 , H02M1/00
摘要： A signal source generates a drive signal according to a dimming level. A discharge part includes a series circuit having a Zener diode and a rectifier element connected in series. The series circuit enables passage of a reverse current of the Zener diode. In the discharge part, the series circuit is electrically connected between a control terminal and the signal source to enable the reverse current of the Zener diode to flow from the control terminal to the signal source.
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公开(公告)号：US11218021B2
公开(公告)日：2022-01-04
申请号：US16689394
申请日：2019-11-20
发明人： Shusaku Goto , Kengo Miyamoto
摘要： A load controller according to an embodiment includes a switching unit, a power source unit, and a control unit. The switching unit controls supply of power from an AC power supply to a load by selectively connecting or disconnecting the load to/from the AC power supply. The power source unit converts AC power supplied from the AC power supply into DC power. The control unit operates with the DC power supplied from the power source unit and controls the switching unit. The power source unit includes a constant-voltage source and a constant-current source. The constant-voltage source keeps a DC voltage to be output to the control unit a constant voltage. The constant-current source keeps a DC current to be supplied via the constant-voltage source to the control unit a constant current.
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公开(公告)号：US10356867B2
公开(公告)日：2019-07-16
申请号：US15751859
申请日：2016-09-01
摘要： In a light-dimming device according to an example of the present invention, a controller is configured to be supplied with control electric power from an electricity accumulator to operate and to retain a bidirectional switch in an on state for an on time having a length according to a dimming level in every half period of an AC voltage of an AC power supply in a lighting mode. A charger including a first charger and a second charger causes a current to flow from a pair of input terminals and to the electricity accumulator. An impedance of the second charger which is a charger in a case of causing a current to flow to the electricity accumulator in the lighting mode is lower than an impedance of the first charger which is a charger in a case of causing a current to flow to the electricity accumulator in a non-lighting mode.
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公开(公告)号：US10070492B2
公开(公告)日：2018-09-04
申请号：US15739742
申请日：2016-06-28
CPC分类号： H05B33/0845 , G05F1/56 , H05B33/0884 , H05B33/089 , H05B37/02
摘要： The dimming device includes a pair of input terminals, a bidirectional switch, an inputter, a power supply, a controller, and a current limiter. The power supply is electrically connected between the pair of input terminals and is supplied with electric power from an AC power supply to generate control electric power. The controller is supplied with the control electric power from the power supply to operate. The controller is configured to control the bidirectional switch in accordance with a dimming level. The current limiter stops generation of the control electric power by the power supply when a current larger than or equal to a specified value flows from the AC power supply through the power supply.
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公开(公告)号：US11317484B2
公开(公告)日：2022-04-26
申请号：US17262294
申请日：2019-07-22
发明人： Kengo Miyamoto , Shogo Kajiwara
IPC分类号： H05B45/10 , H05B45/40 , H05B45/315 , H02M5/293 , H02M7/06
摘要： In a load control system as described, each of a plurality of switch circuits includes a switch electrically connected between an associated one second terminal out of a plurality of second terminals and a first terminal. A control circuit controls the switch that each of the plurality of switch circuits includes and thereby controls supply of power to a load associated with each of the plurality of switch circuits. A power supply circuit is electrically connected between the plurality of second terminals and the first terminal and receives power from a power supply via the first terminal and at least one second terminal out of the plurality of second terminals and thereby generates power to be supplied to at least the control circuit.
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公开(公告)号：US10736188B2
公开(公告)日：2020-08-04
申请号：US15757353
申请日：2016-09-02
IPC分类号： H02J7/00 , H05B45/10 , H05B45/37 , H05B47/175 , H02J7/34
摘要： A power supply is electrically connected between a pair of input terminals and is configured to be supplied with electric power from an AC power supply to generate control electric power. A voltage detector is configured to detect a voltage of the control electric power. A controller is configured to be supplied with the control electric power from the power supply to operate. The controller is configured to control a bidirectional switch based on a detection signal from a phase detector so as to switch the bidirectional switch from an ON state to an OFF state at a switching time point when a variable time corresponding to a dimming level elapses from a starting point of a half period of an AC voltage. A stopper is configured to halt generation of the control electric power by the power supply when the voltage detected by the voltage detector is higher than or equal to a prescribed threshold during an OFF time period from the switching time point to an end time point of the half period.
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公开(公告)号：US10390401B2
公开(公告)日：2019-08-20
申请号：US15757349
申请日：2016-09-02
IPC分类号： H05B37/02 , H05B33/08 , F21V23/02 , F21Y115/10
摘要： A lighting control device includes a bidirectional switch, an inputter, a controller, and a corrector. The bidirectional switch is configured to switch between conduction and non-conduction of a bidirectional current between a pair of input terminals. The inputter is configured to receive a dimming level specifying the magnitude of a light output of a load. The controller is configured to control the bidirectional switch so as to retain the bidirectional switch in an ON state for an on time having a length determined in accordance with the dimming level within a prescribed range in each of half periods of an AC voltage of an AC power supply. The corrector is configured to (i) determine whether or not a target waveform has an anomaly with reference to a prescribed determination condition, and (ii) correct the prescribed range so as to narrow the prescribed range when the target waveform has the anomaly; wherein the target waveform is a waveform of at least one of a voltage and a current input to the pair of input terminals.
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