Abstract: A switching system includes a power switching section, a control module, and a casing. The power switching section includes at least one power transfer switch and a power selector. The power selector opens and closes the at least one power transfer switch. The control module includes one or more supply transfer switches and a supply controller. The supply controller opens and closes the one or more supply transfer switches. The casing houses the power switching section and the control module.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A load control system includes a switch, a controller, an additional functioning unit, a power source, and an adjuster. The controller is configured to switch the switch between a conduction state and a non-conduction state. The switch is electrically connected in series to a load with respect to an alternating-current power source. The additional functioning unit is configured to perform a process different from switching operation of the switch. The power source receives electric power supplied from the alternating-current power source to generate electric power to be supplied to the controller and the additional functioning unit. The adjuster adjusts a supply time period during which the power source is supplied with electric power from the alternating-current power source in a maximum load state of a state where the additional functioning unit normally operates, electric power consumption by the additional functioning unit being maximum in the maximum load state.

Abstract: A display device, program, and display method that even if the luminance is changed with respect to the previously set relationship between the ambient illuminance and the luminance of a display, are able to suppress a change in the previous relationship. A display device includes a display, an illuminance acquisition unit configured to acquire an ambient-light illuminance that is an illuminance of ambient light, a relationship acquisition unit configured to acquire a relationship between the ambient-light illuminance and a luminance of the display, a controller configured to control the relationship, and a setting unit configured to set a first set point and a second set point. The first set point is a point specified by a luminance set at an illuminance equal to or greater than a particular illuminance Is and the illuminance.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A display device, program, and display method that even if the luminance is changed with respect to the previously set relationship between the ambient illuminance and the luminance of a display, are able to suppress a change in the previous relationship. A display device includes a display, an illuminance acquisition unit configured to acquire an ambient-light illuminance that is an illuminance of ambient light, a relationship acquisition unit configured to acquire a relationship between the ambient-light illuminance and a luminance of the display, a controller configured to control the relationship, and a setting unit configured to set a first set point and a second set point. The first set point is a point specified by a luminance set at an illuminance equal to or greater than a particular illuminance Is and the illuminance.

Abstract: Protective circuit is provided for wiring accessory including switch circuit and switch controller. Switch circuit possesses control terminal, and is electrically connected between input terminals that allow electrical connection to both ends of series circuit of AC power grid and load, and is switched between conductive and non-conductive between both ends of series circuit according to control signal to control terminal. Protective circuit includes current sensor that detects electric current flowing through switch circuit, and protective switch that is electrically connected between control terminal and potential reference point, and turns on when current value of electric current detected through current sensor exceeds threshold value.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A bidirectional switch is configured to switch between conduction and non-conduction of a bidirectional current between a pair of input terminals. An inputter is configured to receive a dimming level specifying the magnitude of a light output of a load. A 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. A corrector is configured to determine whether or not a target waveform has an anomaly with reference to a prescribed determination condition. The corrector is configured to correct the prescribed range so as to narrow the prescribed range when the target waveform has the anomaly. The target waveform is a waveform of at least one of a voltage and a current input to the pair of input terminals.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.