Abstract: A luminaire includes a light source having a light-emitting element, and a communication device configured to transmit and/or receive a communication signal by wireless communication. The luminaire further includes a power supply configured to supply electric power to the light source and the communication device, and a housing configured to contain the communication device and the power supply. The light source is configured to be held by the housing. The housing is provided with an opening. The housing has a rectangular parallelepiped shape with electrically conductive walls to form a rectangular waveguide having a cutoff frequency. The housing is set to have a dimension in a width direction thereof such that a radio frequency of the communication signal is equal to or more than the cutoff frequency.

Abstract: In a lighting system, each lamp has a wireless circuit that realizes: a time measuring unit measuring the elapsed time period since the lamp is turned on by a wall switch; a specifying unit specifying a plurality of electrical devices wired to the wall switch according to the elapsed time period measured by each time measuring unit; an identification information assigning unit assigning same identification information to the plurality of lamps specified by the specifying unit as being wired to the same wall switch; and a registration unit registering a Net-ID of a remote control.

Abstract: Illumination control system 1 includes illumination apparatuses 10 and control apparatus 20 for controlling them. Each illumination apparatus 10 includes: communication unit 101 that performs wireless communication with control apparatus 20; and controller 102 that receives from control apparatus 20 instruction on operation and causes illumination apparatus 10 to perform the instructed operation.

Abstract: A lighting apparatus which is one of a plurality of lighting apparatuses each capable of performing wireless communication with a control device. The lighting apparatus includes: a light emitting unit; a controller which controls turn-on of the light emitting unit; and a communication unit configured to perform wireless communication with the control device to obtain correction time from the control device, the correction time being based on communication delay between the control device and each lighting apparatus. The communication unit further obtains a turn-on instruction for turning on the light emitting unit from the control device, and transmits a response to the turn-on instruction to the control device upon obtainment of the turn-on instruction. The controller turns on the light emitting unit after passage of a time period from when the response is transmitted to the device, the time period being calculated by subtracting communication latency from the correction time.

Abstract: A luminaire includes: a power circuit that supplies power to a light source; an antenna that at least one of transmits and receives a wireless signal; and a metal housing that contains the antenna and the power circuit, wherein the metal housing has an opening, and the antenna and the opening are arranged to cause a polarization plane of an electric wave most strongly radiated from the antenna and a polarization plane of an electric wave most strongly radiated from the opening to substantially coincide with each other.

Abstract: Illumination control system 1 includes illumination apparatuses 10 and control apparatus 20 for controlling them. Each illumination apparatus 10 includes: communication unit 101 that performs wireless communication with control apparatus 20; and controller 102 that receives from control apparatus 20 instruction on operation and causes illumination apparatus 10 to perform the instructed operation.

Abstract: A lighting device including: a lighting circuit; a drive circuit; a dimmer control circuit; and an LPF, the drive circuit for increasing on-time as a pulse height increases when an inputted PWM signal satisfies a first condition where a pulse height is greater than a first threshold and less than a second threshold greater than the first threshold, and making the on-time for which a switching element is on when the switching element turns on and off once in a burst period, constant in a second condition where the height pulse is greater than the second threshold, the LPF generating a smoothed PWM signal which has a first time period satisfying the first condition and a second time period satisfying the second condition in a signal interval indicating a duty ratio, and outputting the smoothed PWM signal to the drive circuit.

Abstract: An illumination control device (100) includes a motion detector (110) and a control unit (150) which perform control of illuminance, color, or distribution of light of an illumination light source (210) based on a result of detection by the motion detector (110).

Abstract: A lighting device which includes: a light source; a receiving unit which receives a control signal from outside the lighting device via wireless communication; and a control unit which causes the light source to emit light according to the control signal received by the receiving unit. When the receiving unit receives, from the outside the lighting device via the wireless communication, a test signal different from the control signal and for determining a state of the wireless communication, the control unit calculates a packet error rate of the test signal received by the receiving unit and causes the light source to emit light such that an emission state is changed according to a communication quality of the wireless communication determined based on at least the calculated packet error rate.

Abstract: There is provided a lamp capable of informing a user that the LED lamp is at the end of its productive life and urging the user to replace the lamp reliably with a simple configuration. The lamp includes: a light emitting diode (1) as a light source; and a driving circuit (3) that turns on the light emitting diode (1) by an alternating-current or direct-current power source. The lamp further includes a life detecting element (2) that turns off the light emitting diode (1) following the occurrence of insulation deterioration in a resin material when the light emitting diode (1) has been operated for a predetermined time.

Abstract: A lighting device which includes: a light source; a receiving unit which receives a control signal from outside the lighting device via wireless communication; and a control unit which causes the light source to emit light according to the control signal received by the receiving unit. When the receiving unit receives, from the outside the lighting device via the wireless communication, a test signal different from the control signal and for determining a state of the wireless communication, the control unit calculates a packet error rate of the test signal received by the receiving unit and causes the light source to emit light such that an emission state is changed according to a communication quality of the wireless communication determined based on at least the calculated packet error rate.

Abstract: In a lighting system, each lamp has a wireless circuit that realizes: a time measuring unit measuring the elapsed time period since the lamp is turned on by a wall switch; a specifying unit specifying a plurality of electrical devices wired to the wall switch according to the elapsed time period measured by each time measuring unit; an identification information assigning unit assigning same identification information to the plurality of lamps specified by the specifying unit as being wired to the same wall switch; and a registration unit registering a Net-ID of a remote control.

Abstract: A lighting circuit that is for a lamp including an LED as a light source and that includes a resonant circuit that can be designed with ease. A lighting circuit 11 is for a lamp including a light-emitter 39 composed of an LED as a light source. The lighting circuit comprises: a rectifier circuit 31 that rectifies power supplied from an alternating current power supply via a base 28; an inverter circuit 33 connected to an output side of the rectifier circuit 31 and outputting alternating power to the LED; and a resonant circuit 35 connected to an output side of the inverter circuit 33, wherein the resonant circuit 35 includes an inductor L and a capacitor C1 and is connected in series with the light-emitter 39, the inductor L and the capacitor C1 being connected in series.

Abstract: A lighting device including: a lighting circuit; a drive circuit; a dimmer control circuit; and an LPF, the drive circuit for increasing on-time as a pulse height increases when an inputted PWM signal satisfies a first condition where a pulse height is greater than a first threshold and less than a second threshold greater than the first threshold, and making the on-time for which a switching element is on when the switching element turns on and off once in a burst period, constant in a second condition where the height pulse is greater than the second threshold, the LPF generating a smoothed PWM signal which has a first time period satisfying the first condition and a second time period satisfying the second condition in a signal interval indicating a duty ratio, and outputting the smoothed PWM signal to the drive circuit.

Abstract: There is provided a lamp capable of informing a user that the LED lamp is at the end of its productive life and urging the user to replace the lamp reliably with a simple configuration. The lamp includes: a light emitting diode (1) as a light source; and a driving circuit (3) that turns on the light emitting diode (1) by an alternating-current or direct-current power source. The lamp further includes a life detecting element (2) that turns off the light emitting diode (1) following the occurrence of insulation deterioration in a resin material when the light emitting diode (1) has been operated for a predetermined time.

Abstract: A lighting circuit that is for a lamp including an LED as a light source and that includes a resonant circuit that can be designed with ease. A lighting circuit 11 is for a lamp including a light-emitter 39 composed of an LED as a light source. The lighting circuit comprises: a rectifier circuit 31 that rectifies power supplied from an alternating current power supply via a base 28; an inverter circuit 33 connected to an output side of the rectifier circuit 31 and outputting alternating power to the LED; and a resonant circuit 35 connected to an output side of the inverter circuit 33, wherein the resonant circuit 35 includes an inductor L and a capacitor C1 and is connected in series with the light-emitter 39, the inductor L and the capacitor C1 being connected in series.

Abstract: A lighting circuit that receives power from an alternating-current power supply 43 via a dimmer 45 to light an LED, the lighting circuit comprising: a rectification circuit 31; a switching power supply unit 35 connected to the rectification circuit 31 and including a first switching element; a control circuit 41 performing on-off control on the first switching element so as to adjust power to be supplied to the LED; and a Zener diode D7 as a second switching element causing the control circuit 41 to stop performing the on-off control on the first switching element when a dimming level set by the dimmer 45 becomes equal to or lower than a predetermined level.