Abstract: According to one embodiment, a lighting apparatus is provided in which positioning of a light-emitting module including a ceramic board is easy and light extraction efficiency is improved. The lighting apparatus includes an apparatus body; a light-emitting module which includes a light transmissive ceramic board and a light-emitting element provided on one surface side of the ceramic board and is disposed in the apparatus body; a thermal radiator including a light-emitting module connection part to which the light-emitting module is heat-conductively connected; a heat conductive sheet intervening between the light-emitting module connection part and the light-emitting module and having insulation properties; and a reflection member intervening between the heat conductive sheet and other surface side of the ceramic board and having light reflective properties and sliding properties.

Abstract: A switching power supply apparatus according to an embodiment includes a switching element, an inductor, a drive circuit, a mounting substrate, and an insulating substrate. The switching element is connected between a power supply and a lighting load. The inductor is connected in series to the switching element. The drive circuit controls the switching element, converts a voltage supplied from the power supply, and is mounted on the mounting substrate. The insulating substrate is thermally connected to the switching element, and has thermal conductivity higher than the mounting substrate.

Abstract: According to one embodiment, a storage part stores light output characteristic patterns each indicating a ratio of a change in a light output to a change in an input dimming level with respect to plural lighting loads. A display control unit causes a display unit to display plural selection parts corresponding to the lighting loads and to display thumbnail images of the light output characteristic patterns of the lighting loads stored in the storage part correspondingly to the selection parts. A setting unit selects the selection part displayed on the display unit and sets the light output characteristic pattern.

Abstract: A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.

Abstract: According to one embodiment, there is provided a power supply device which includes a power conversion circuit which outputs an input power to an LED element as a load by converting the input power into a predetermined output power; and a control circuit which performs a feedback control of the power conversion circuit by detecting the output power of the power conversion circuit, and performs a dimming control which causes the LED element to be subject to a dimming operation based on a dimming signal which is output from a dimmer, in which, when a dimming OFF signal is input, the power conversion circuit outputs power which causes the LED element to be turned off while continuing an operation of the power conversion circuit.

Abstract: A power supply circuit includes a bridge circuit, a transformer, and a rectifying and smoothing circuit. The bridge circuit includes at least one switching element and converts a direct-current voltage into an alternating-current voltage according to ON and OFF of the switching element. The transformer includes a primary winding wire and a secondary winding wire. The rectifying and smoothing circuit converts the alternating-current voltage into a direct-current output voltage and supplies the direct-current output voltage to a direct-current load. When the number of turns of the primary winding wire is represented as N1, the number of turns of the secondary winding wire is represented as N2, a voltage value of the direct-current voltage is represented as VDC, and a lower limit value of the output voltage is represented as Vmin, a turn ratio of the primary winding wire and the secondary winding wire is about N1:N2=(VDC/2):Vmin.

Abstract: The disclosure is to provide a light emitting module that suppress a dark section from forming in an end portion thereof, a tube type light emitting lamp and a luminaire. The light emitting module includes a long substrate that has a connection member provided in an end portion thereof in a longitudinal direction; a first light emitting element that is provided on the substrate to line up in a row with the connection member in a short direction; and a second light emitting element that has a light emitting surface area larger than the first light emitting element, and is provided closer to a center side of the substrate in the longitudinal direction than the first light emitting element.

Abstract: A power supply circuit includes a rectifying circuit, a power-factor improving circuit, a bridge circuit, a transformer, a rectifying and smoothing circuit, first and second drivers, a power supply section, and a control section. The rectifying circuit converts an alternating-current input voltage into a rectified voltage. The power-factor improving circuit improves a power factor of the rectified voltage and converts the rectified voltage into a direct-current voltage. The bridge circuit converts the direct-current voltage into an alternating-current voltage. The rectifying and smoothing circuit converts the alternating-current voltage into a direct-current output voltage. The first driver controls a switching element. The second driver controls the power-factor improving circuit. The power supply section converts the direct-current voltage into a driving voltage corresponding to the first and second drivers.

Abstract: According to one embodiment, there is provided a power supply circuit including a direct-current voltage source, a bridge circuit, a transformer, and a rectifying and smoothing circuit. The bridge circuit includes at least one switching element and converts a direct-current voltage supplied from the direct-current voltage source into an alternating-current voltage according to ON and OFF of the switching element. The transformer includes a primary winding wire connected to the bridge circuit and a secondary winding wire magnetically coupled to the primary winding wire. The rectifying and smoothing circuit converts the alternating-current voltage output from the secondary winding wire into a direct-current output voltage and supplies the direct-current output voltage to a direct-current load. The bridge circuit includes a capacitor connected between the primary winding wire and a terminal on a low potential side of the direct-current voltage source.

Abstract: A power supply circuit includes a bridge circuit, a transformer, a rectifying and smoothing circuit, a driver, a feedback circuit, and a power supply section. The bridge circuit converts a direct-current voltage into an alternating-current voltage. The transformer includes a primary winding wire and a secondary winding wire. The rectifying and smoothing circuit converts the alternating-current voltage into a direct-current output voltage and supplies the direct-current output voltage to a direct-current load. The driver controls ON and OFF of the switching element. The feedback circuit receives a detection signal of an output current flowing to the direct-current load and a differential signal obtained from fluctuation of the output voltage and feedback-controls the driver on the basis of the signals. The power supply section generates a driving voltage corresponding to the feedback circuit from the output voltage and supplies the driving voltage to the feedback circuit.

Abstract: A lamp may include an outer shell having heat conductivity and a base provided in the outer shell. The outer shell may include a light source support, and a heat radiating surface exposed to the outside of the outer shell. The light source support may, in some examples, be formed integrally with the heat radiating surface. A light source may be supported on the light source support. The light source may be heated during lighting, and be thermally connected to the light source support. In some examples, the light source may be covered by a cover.

Abstract: According to one embodiment, a light emitting module includes: a semiconductor light emitting element and an incident suppression section. The semiconductor light emitting element includes a base material and a light emitting layer. The base material is formed of a material absorbing light and is provided on a substrate. The light emitting layer is provided on the base material and emits the light. The incident suppression section is provided around the base material and suppresses light among the light that is emitted from the light emitting layer from being incident on the base material.

Abstract: According to one embodiment, a power supply device includes a rectifier circuit, a smoothing capacitor, and a normally on type transistor. The rectifier circuit is configured to rectify an alternating current supplied from a voltage source. The smoothing capacitor is charged by an output current output from the rectifier circuit. The normally on type transistor is connected between the rectifier circuit and the smoothing capacitor in series and is configured to limit an output current value of the rectifier circuit during a voltage input from the voltage source to an output current value higher than an output current value of the rectifier circuit during a steady operation.

Abstract: According to one embodiment, there is provided a light-emitting module including a substrate, a light-emitting body provided on the substrate, and a phosphor containing layer provided on the substrate and the light-emitting body, the phosphor containing layer including a first phosphor excited by emitted light of the light-emitting body, having a light emission peak in a wavelength range equal to or greater than 610 nm and less than 655 nm, and having a surface covered with a protection film.

Abstract: According to one embodiment, a thermal radiator of a lamp device includes a light-emitting module connection part to which a light-emitting module is thermally conductively connected. An attachment base is arranged around the light-emitting module connection part. The attachment base is made of an insulating material, and supports the light-emitting module connected to the light-emitting module connection part. The light-emitting module connection part protrudes from the attachment base.

Abstract: A rectifying circuit according to an embodiment includes a first rectifying portion and a second rectifying portion. The first rectifying portion has a positive temperature coefficient. The second rectifying portion has a negative temperature coefficient, is connected in parallel to the first rectifying portion, and has a forward voltage-forward current curve intersecting a forward voltage-forward current curve of the first rectifying portion.

Abstract: According to one embodiment, a dimming control system includes a luminaire and a host equipment. The luminaire receives dimming data transmitted using data frames based on a specified communication protocol, and performs dimming control of a lighting load. The host equipment uses the data frames to transmit the dimming data, and uses a part of the data frames to transmit a command to request luminaire information of the luminaire.

Abstract: According to one embodiment, a light emitting module includes a semiconductor light emitting element and a heat radiating section. The semiconductor light emitting element includes a base material and a light emitting layer. The base material is formed of a material absorbing light and is provided on a substrate. The light emitting layer is provided on the base material and emits the light. The heat radiating section is provided around the base material and radiates heat that is generated in the light emitting layer to the substrate by receiving the heat through the base material.

Abstract: According to one embodiment, a power supply device includes a first inductor, a current control section configured to limit a current value of an electric current flowing through the first inductor to a predetermined current value, the current control section including a first switching element of a normally on type and a resistor connected to a main terminal of the first switching element, a rectifying element connected to the current control section in series, and a second inductor magnetically coupled to the first inductor. The second inductor is configured to induce a voltage for turning on the current control section, when the electric current of the first inductor increases, to induce a voltage for turning off the current control section, when the electric current of the first inductor decreases, and to supply the induced voltage to a control terminal of the current control section.

Abstract: According to one embodiment, a lighting control system includes: a plurality of lighting apparatuses, a sound sensor and a control device. The plurality of lighting apparatuses illuminate a predetermined space. The sound sensor is disposed in the predetermined space and detects a voice of a person in the space. The control device is connected to the plurality of lighting apparatuses and the sound sensor, and controls at least one of a light color and a dimming degree of the plurality of lighting apparatuses depending on quality of the voice of the person that is detected by the sound sensor.