Abstract: A motor unit for use in an electric bicycle includes a motor, a switching element, a board, and a case. The switching element has the motor driven. The board has a principal surface and a reverse surface. The principal surface includes a mounting surface to mount the switching element thereon. The reverse surface faces opposite from the principal surface. The case houses the board therein. The board further has a through hole provided to penetrate through the board from the mounting surface through the reverse surface and a sheet of metal foil covering an inner peripheral surface of the through hole at least partially. The switching element is thermally connected to the sheet of metal foil. A part, located opposite from the switching element with respect to the board, of the case is thermally connected to the sheet of metal foil.

Abstract: A motor unit, which is an example of an embodiment, includes a motor including a motor shaft, a rotor fixed to the motor shaft, and a stator, and a control board, the control board being disposed with at least a part of the control board overlapping the motor when viewed in a motor axial direction. A sensor that detects a magnetic field of the motor shaft, the rotor, or a rotating body rotating together with the motor shaft, and a control element that controls the motor using detection information of the sensor, are mounted on the control board. The control board includes a signal line that connects the sensor and the control element. The signal line includes an arcuate wiring section bent to be convex in a radial direction outer side of a circle centering on a shaft core of the motor shaft.

Abstract: A light-emitting diode (LED) lighting device includes (i) a selector circuit that sequentially and cyclically selects a plurality of LED loads one by one, the plurality of LED loads respectively emitting light as a result of being selected, and (ii) a control circuit that controls the selector circuit to cause an intermediate color to be produced by successively generating frames, each frame being a temporal combination of at least one first cycle period and at least one second cycle period, the at least one first cycle period generating a first mixed emission color, and the at least one second cycle period generating a second mixed emission color different from the first mixed emission color.

Abstract: A light-emitting diode (LED) lighting device includes (i) a selector circuit that sequentially and cyclically selects a plurality of LED loads one by one, the plurality of LED loads respectively emitting light as a result of being selected, and (ii) a control circuit that controls the selector circuit to cause an intermediate color to be produced by successively generating frames, each frame being a temporal combination of at least one first cycle period and at least one second cycle period, the at least one first cycle period generating a first mixed emission color, and the at least one second cycle period generating a second mixed emission color different from the first mixed emission color.

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.

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 includes: a constant current supply circuit; and a first modulation circuit and a second modulation circuit that are connected in series between output terminals of the constant current supply circuit. The first modulation circuit includes a first capacitor that is connected in parallel to the first modulation circuit. The second modulation circuit includes a second capacitor that is connected in parallel to the second modulation circuit.

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.

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 modulation device includes: a signal input circuit that receives an external input signal and outputs the signal downstream as a first signal; and an arithmetic processor positioned downstream of the signal input circuit. The arithmetic processor is configured to: determine when an external ID signal including ID information has been input as the first signal, and when determining that an external ID signal including ID information has been input as the first signal, acquire the ID information from the external ID signal, obtain transmission timing synchronizing with the first signal based on the external ID signal, and output a light source drive signal that drives a light source according to the ID information based on the transmission timing synchronizing with the input signal.

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.

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: An illumination apparatus includes light sources differing from one another in terms of light-emission color and voltage drop when identical current flows therein, switches in one-to-one correspondence with the light sources, a DC power supply circuit, and a control circuit. The control circuit performs a first control of the switches through a time division control method such that an on-period of each switch is not overlapped with that of any other switch. The control circuit also performs a second control to individually control at least one of a target current magnitude, flowing through each switch in the switched-on state, and a target on-period length of each switch, and to adjust a ratio of the plurality of light sources in terms of a product of the target current magnitude and the target on-period length.

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: 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.

Abstract: Provided is a control circuit (modulation circuit) that receives output current determined based on a dimming signal, from a lighting device, consumes, as consumption current, part of the output current, and supplies supply current to a light-emitting element. The control circuit includes a regulator circuit that regulates the consumption current. The regulator circuit monotonously increases a magnitude of the consumption current relative to a magnitude of the output current.

Abstract: A lighting device includes: a constant current supply circuit; and a first modulation circuit and a second modulation circuit that are connected in series between output terminals of the constant current supply circuit. The first modulation circuit includes a first capacitor that is connected in parallel to the first modulation circuit. The second modulation circuit includes a second capacitor that is connected in parallel to the second modulation circuit.

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.

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 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.