Abstract: An illumination control system includes an illumination device including light sources, and an illumination control device which is capable of individually controlling light emission of the light sources and includes: a measurer which obtains space information regarding a space in which the illumination device is to be installed and position information indicating a position at which the illumination device is to be installed inside the space; an information transmitter which transmits control information to the illumination device; and an information processor which optimizes control information for controlling a lighting mode of each of the light sources, according to an installation condition of the illumination device indicated in the space information and the position information.

Abstract: An illumination control system includes an illumination device including light sources, and an illumination control device which is capable of individually controlling light emission of the light sources and includes: a measurer which obtains space information regarding a space in which the illumination device is to be installed and position information indicating a position at which the illumination device is to be installed inside the space; an information transmitter which transmits control information to the illumination device; and an information processor which optimizes control information for controlling a lighting mode of each of the light sources, according to an installation condition of the illumination device indicated in the space information and the position information.

Abstract: A light emission control device includes a light emission controller which controls a light emitter and performs normal control and wake-up control, the normal control being control for causing the light emitter to emit light having a color temperature and luminance according to an instruction of a user, the wake-up control being control for causing the light emitter to emit light at increasing luminance over time to wake up the user who is sleeping. The maximum luminance of light emitted by the light emitter in the wake-up control is greater than the maximum luminance of light emitted by the light emitter in the normal control.

Abstract: A lighting apparatus includes: an illuminator including a light source which emits illumination light; a lighting controller which controls the illuminator; and a receiver which receives, from a control apparatus, a control command signal generated based on at least one of user information and environmental information in order to control the illumination light of the illuminator, wherein the control command signal received by the receiver includes one or more parameters including, as an element, at least one of a brightness of the illumination light of the illuminator, a color temperature of the illumination light of the illuminator, and control time for controlling the illumination light of the illuminator.

Abstract: A lighting device is provided that includes a lighting controller that controls a light emitter that emits illumination light. The lighting controller includes a first filter that converts a first signal waveform that is defined by a first piecewise linear curve and whose intensity repeatedly increases and decreases into a signal waveform having a smooth rounded curve, and outputs the converted signal waveform as a first output waveform. The lighting controller causes the light emitter to repeatedly increase and decrease the intensity of the illumination light in accordance with the first output waveform.

Abstract: A lighting device which causes a first light source to emit illumination light and a second light source to emit illumination light having a color temperature higher than a color temperature of the illumination light emitted by the first light source includes: an illuminator which includes a first switching element connected in series to the first light source, and a second switching element connected in series to the second light source; an illumination controller which controls the illuminator to place at least one of the first switching element and the second switching element into an off state; and a constant-current controller which detects a sum of values of currents flowing through the first light source and the second light source, and controls the first switching element and the second switching element based on the sum.

Abstract: A lighting device is provided that includes a lighting controller that controls a light emitter that emits illumination light. The lighting controller includes a first filter that converts a first signal waveform that is defined by a first piecewise linear curve and whose intensity repeatedly increases and decreases into a signal waveform having a smooth rounded curve, and outputs the converted signal waveform as a first output waveform. The lighting controller causes the light emitter to repeatedly increase and decrease the intensity of the illumination light in accordance with the first output waveform.

Abstract: A light emission control device includes a light emission controller which controls a light emitter and performs normal control and wake-up control, the normal control being control for causing the light emitter to emit light having a color temperature and luminance according to an instruction of a user, the wake-up control being control for causing the light emitter to emit light at increasing luminance over time to wake up the user who is sleeping. The maximum luminance of light emitted by the light emitter in the wake-up control is greater than the maximum luminance of light emitted by the light emitter in the normal control.

Abstract: A lighting device which causes a first light source to emit illumination light and a second light source to emit illumination light having a color temperature higher than a color temperature of the illumination light emitted by the first light source includes: an illuminator which includes a first switching element connected in series to the first light source, and a second switching element connected in series to the second light source; an illumination controller which controls the illuminator to place at least one of the first switching element and the second switching element into an off state; and a constant-current controller which detects a sum of values of currents flowing through the first light source and the second light source, and controls the first switching element and the second switching element based on the sum.

Abstract: A lighting apparatus includes: an illuminator including a light source which emits illumination light; a lighting controller which controls the illuminator; and a receiver which receives, from a control apparatus, a control command signal generated based on at least one of user information and environmental information in order to control the illumination light of the illuminator, wherein the control command signal received by the receiver includes one or more parameters including, as an element, at least one of a brightness of the illumination light of the illuminator, a color temperature of the illumination light of the illuminator, and control time for controlling the illumination light of the illuminator.

Abstract: A lighting control device includes: a sensor that detects a state of a user and a gesture made by the user; and a controller that controls a lighting characteristic of one or more lighting devices. In the lighting control device and in a method of controlling the lighting device, the sensor detects a first state and a second state of a hand of the user. In response to the sensor detecting the hand of the user in the first state aiming at one lighting device among the one or more lighting devices, the controller designates the one lighting device as a control target lighting device, and in response to the sensor detecting a predetermined gesture involving the hand in the second state, the controller controls a lighting characteristic of the control target lighting device.

Abstract: A lighting control device includes; a sensor that detects a state of a user and a gesture made by the user; and a controller that controls a lighting characteristic of one or more lighting devices. The sensor detects a first state and a second state of a hand of the user. In response to the sensor detect the hand of the user in the first state aiming at one lighting device, among the one or more lighting devices, the controller designates the one lighting device as a control target lighting device, and in response to the sensor detecting a predetermined gesture involving the hand in the second state, the controller controls a lighting characteristic of the control target lighting device.

Abstract: A luminaire is provided with a reflector, a lamp body, a discharge lamp, an igniter, a lighting circuit including an inverter, and a socket, wherein both of the igniter and lighting circuit are disposed in the socket, the discharge lamp is fixed to the socket, the socket is fixed to the reflector, and the discharge lamp is housed in the reflector, whereby it is enabled to attempt a reduction of constituting parts of the lighting circuit in the luminaire and, in particular, to attempt an improvement in assembling workability of the luminaire.

Abstract: A luminaire includes a discharge lamp, a lighting device supplying a power for lighting the discharge lamp, and a lamp body for housing the discharge lamp and an igniter for starting the discharge lamp, the lighting device and igniter being provided separately, while the lighting device being disposed in the lamp body, whereby such parts employed in the lighting device as harness or the like to which a high voltage is applied can be shortened in the length to be able to improve the safety.

Abstract: A safety ballast for a discharge lamp capable of interrupting the supply of the electric power upon failure of starting the lamp. The ballast includes a converter providing a DC power voltage from a DC voltage source, a booster providing a boosted DC voltage to a starter which generates, based upon the boosted DC voltage, a starting voltage for starting the lamp, and an inverter receiving the DC power from the converter to provide an AC power for operating the lamp. The booster includes a capacitor which is charged by the DC power and accumulate the boosted voltage. A controller monitors a load condition of the lamp and issues a disable signal when a no-load condition continues over a predetermined starting period. The inverter includes a plurality of switching elements one of which is regulated to be turned on in response to the no-load signal for establishing a supply path of supplying the boosted voltage from the booster's capacitor through the switching element to the starter.