Abstract: A lighting system according to an embodiment includes a plurality of lighting devices, and a host device which controls the lighting devices. In addition, the lighting system collects information according to a place where the lighting system is installed. Then, the lighting system performs, according to the collected information, a gradation control which turns on lighting devices at a periphery area which are installed on the periphery of lighting devices at a central area that are instructed to be turned on at a degree of dimming which is lower than a degree of dimming of the lighting devices at the central area.

Abstract: According to one embodiment, a power supply device includes a terminal connected to an output of a dimmer, a rectifier circuit, a switching circuit including an inductor, a switching element connected to the inductor in series, and a first rectifying element and configured to change the switching element to an ON state to feed an output current of the rectifier circuit to the inductor, after the dimmer changes from a non-conduction state to a conduction state, when the dimmer is a dimmer of a phase control type, and configured to change the switching element to the ON state to feed the output current of the rectifier circuit to the inductor, after the dimmer changes from the non-conduction state to the conduction state, when the dimmer is a dimmer of an anti-phase control type, and a DC-DC converter configured to convert the output voltage of the switching circuit.

Abstract: According to one embodiment, a power supply device includes a conductive first mounting board, a first switching element, a current control element, and a second switching element. The first switching element is mounted on the first mounting board. The current control element is mounted on the first mounting board, includes a main terminal connected to the first mounting board, is connected to the first switching element in series, and is configured to limit an electric current of the first switching element. The second switching element is connected to the current control element in series. An electric current flows to the second switching element when the first switching element is off.

Abstract: According to one embodiment, there is provided a light emitting module including a board, a semiconductor light emitting element, an electronic component, a first pad, and a second pad. The surface of the first pad on the board is covered with a metal film. The semiconductor light emitting element is mounted on the first pad. The surface of the second pad on the board is covered with a metal film. The electric component is mounted on the second pad. The semiconductor light emitting element is wire-bonded on the first pad covered with the metal film. The electric component is joined by solder on the second pad covered with the metal film. The metal film covering the first pad has a film structure lower in density than the metal film covering the second pad.

Abstract: According to one embodiment, there is provided a power supply device includes a DC-DC converter and a protection circuit. The DC-DC converter includes a switching element of a normally on type, a current control element of the normally on type connected to the switching element in series and configured to control an electric current flowing to the switching element, and a rectifying element connected to the current control element in series. The DC-DC converter converts, according to ON and OFF of the switching element, an input first direct-current voltage into a second-direct current voltage, which has an absolute value different from an absolute value of the first direct-current voltage, and supplies the second direct-current voltage to a load. When an electric current equal to or larger than a predetermined value flows to the switching element and the current control element, the protection circuit cuts off the electric current.

Abstract: According to one embodiment, a lighting control system includes a determination unit which determines presence of a person in any one area among the plurality of areas based on a detection result of the human detection sensor; and a control unit which performs a control of turning on a lighting apparatus which is arranged in the one area with a first light amount, when a determination result that a person is present in the one area is obtained in the determination unit, and performs a control of turning on a lighting apparatus which is arranged in each area neighboring the one area with a second light amount which is equal to or smaller than the first light amount, when a person is present in the one area for a first predetermined time.

Abstract: A lighting control system includes a plurality of luminaires and a control device (10; 10A; 10B). The plurality of luminaires illuminate a predetermined space. The control device executes first control for controlling a dimming degree of the luminaire arranged in a peripheral area in the periphery of a center area among the plurality of luminaires to be darker than the luminaire arranged in the center area and lighting the luminaires in the center area and the peripheral area and second control for controlling a dimming degree, according to predetermined conditions, of the luminaire arranged in a wall area, which is a position for illuminating a wall surface, among the plurality of luminaires to be brighter than during the first control.

Abstract: An LED lighting device including a DC power source circuit, a high frequency generation circuit which includes an inverter circuit having switching elements and a resonance circuit having a series-connected inductor and condenser, in which the switching elements are on-off controlled by a no-load resonance frequency of the resonance circuit, and DC voltage input from the DC power source circuit is converted into a high frequency AC voltage, a rectification smoothing circuit having an input side which is connected between both edges of the condenser or both edges of the inductor; and a light emitting diode series connected to an output side of the rectification smoothing circuit.

Abstract: According to an embodiment, a lighting control system includes a smartphone and a lighting control device, and the smartphone includes an illuminance sensor and a wireless communication section. The lighting control device performs dimming control of a plurality of lighting apparatuses that respectively illuminate the plurality of areas, based on detected values of a plurality of areal illuminance sensors, which detect brightness of the plurality of areas, and performs calibration of the areal illuminance sensors, based on a detected value of the illuminance sensor of the smartphone, which is received in a wireless communication device.

Abstract: According to one embodiment, a storing section stores a first group address allocated to a luminaire, stores, as a second group address, the first group address allocated to another luminaire, and stores control information corresponding to the second group address. A control section subjects, when the receiving section receives a control signal including the second group address, a light source section to lighting control on the basis of the control information corresponding to the second group address stored in the storing section.

Abstract: According to one or more arrangements, a lighting device such as a lamp may include a substrate on which one or more lighting elements are mounted. One or more aspects of the lamp may further provide heat conductive/dissipating properties. Additionally or alternatively, the substrate may include a through hole through which at least one wire of the lighting device may extend. For example, the wire may extend through the at least one through-hole from a first side of the substrate to a second side of the substrate. The wire may be connected to a pattern layer of the substrate. According to other aspects, the lighting device may further include a supporting body for supporting the substrate. The supporting body may include another through-hole through which the at least one wire further extends.

Abstract: A lens includes a first lens section and a second lens section, which are integrally formed. The first lens section is formed in a hemispherical shell shape including a first recess opened toward one side of an optical axis direction in which light from a light source is made incident. The second lens section is formed in a hemispherical shell shape including a second recess opened toward the other side of the optical axis direction.

Abstract: According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after rectification, and a falling voltage chopper circuit configured to supply electric power to a load. The first capacitor is set to a capacity in which a section where a voltage after smoothing drops to an output voltage to the load is provided in a rectified half period of the alternating-current power supply. The falling voltage chopper circuit includes at least one switching element configured to receive an input of the voltage after smoothing, operate in a section where the voltage after smoothing exceeds the output voltage, and pause in a section of the output voltage and a second capacitor provided on an output side and having a capacity larger than the capacity of the first capacitor.

Abstract: According to one embodiment, there is provided a control apparatus including a receiving section, a specifying section, and control sections. The receiving section receives a control signal. The specifying section specifies a control system corresponding to the control signal received by the receiving section. The control sections derive, according to the control system specified by the specifying section, control designated by the control signal received by the receiving section, and apply the derived control to a lighting device.

Abstract: According to an embodiment, a lighting device includes: a light emitting section that has a light emitting element and a switch for controlling a lighting state of the light emitting element; a housing that stores the light emitting section and of which one end section is open; a cover that covers the opening of the housing and has translucency; and a frame that is provided between the housing and the cover. The frame includes an edge section that presents a frame shape and a holding section of which one end is provided in the edge section and the other end protrudes from the edge section, and which holds an operation section operating the switch and is exposed from the cover.

Abstract: According to one embodiment, there is provided a light emitting module including a plurality of first light emitting elements and a plurality of second light emitting elements. The plurality of first light emitting elements and the plurality of second light emitting elements are arranged side by side on a board in a plurality of rows set in advance. Each of the plurality of first light emitting elements is arranged such that, in each of the plurality of rows, the number of the first light emitting elements arranged adjacent to one another is equal to or smaller than the number set in advance. Among the plurality of rows, there is a row in which the number of the first light emitting elements arranged adjacent to one another is different from the number in the other rows.

Abstract: A luminaire of the embodiment includes: a light guide portion having a ring shape; a light-emitting portion having a light-emitting element and configured to irradiate the light guide portion with light; and an incident portion provided on an outer peripheral surface of the light guide portion at one end thereof and facing the light-emitting portion at the other end thereof. An angle between an axial line of the incident portion and a line passing through a center of a connecting portion between the incident portion and the light guide portion and coming into contact with an inner peripheral surface of the light guide portion exceeds 0°.

Abstract: According to an embodiment, a light emitting device includes a heat radiation plate, a semiconductor light emitting element, a mounting substrate section including a ceramic substrate, and first and second metal layers, and a bonding layer. The ceramic substrate is provided between the heat radiation plate and the semiconductor light emitting element. The mounting substrate section contacts the ceramic substrate between the heat radiation plate and the ceramic substrate, and includes a first surface on a side of the heat radiation plate and a side surface intersecting a plane perpendicular to a direction from the heat radiation plate to the semiconductor light emitting element. The bonding layer is provided between the heat radiation plate and the second metal layer, and bonds the heat radiation plate and the second metal layer so as to cover the first surface and to contact a part of the side surface.

Abstract: According to one embodiment, a straight tube type lamp includes a light source unit, a straight-tube cover and a cap. The cap includes an insulating cap body disposed at an end part of the straight-tube cover, a pair of terminals projecting from an end face of the cap body and an insulating projection. The projection includes a holding part arranged between the pair of terminals, and a projecting part which projects from a tip of the holding part in a direction of arrangement of the pair of terminals and is arranged at a tip side of the pair of terminals.

Abstract: According to one embodiment, there is provided a lighting device which includes a substrate; a light emitting element which is provided on the substrate; and a resistive element which is provided on the substrate, and is connected to the light emitting element in series, in which a voltage rate of the resistive element when a value of a first voltage which is reduced to half is applied to a first circuit to which the light emitting element and the resistive element are connected in series becomes equal to or smaller than 25% of a voltage rate of the resistive element when the first voltage is applied to the first circuit.