Patent application number | Description | Published |
20130083549 | LED LIGHTING DEVICE AND LED LUMINAIRE - According to one embodiment, the device main body includes a main body portion, a protruding portion, and a heat conducting portion. The main body portion has an opening on one end side and has a wall portion on the other end side that is opposite to the opening side. The protruding portion protrudes from the wall portion and an inside thereof continues into the main body portion. The heat conducting portion has one end side thereof protruding from the wall portion toward the opening and has the other end side thereof connected to the protruding portion in a way that enables heat conduction. The light emitting unit is connected to the one end side of the heat conducting portion in a way that enables heat conduction. The lighting unit is housed inside the device main body and a portion of the lighting circuit component is arranged inside the protruding portion. | 04-04-2013 |
20130106306 | Lamp Unit and Luminaire | 05-02-2013 |
20130106311 | Power Supply Device and Lighting Device | 05-02-2013 |
20130342121 | Luminaire - According to one embodiment, a luminaire includes a rectifying section configured to rectify a voltage of an alternating-current power supply, a power converting section configured to receive an input of an output voltage of the rectifying section and supply required output power to a lighting load, an output control section capable of controlling the operation and output electric energy of the power converting section, a dimming operation terminal device operated to thereby determine a dimming amount of the lighting load, a dimming control section formed to be capable of energizing the dimming operation terminal device and configured to create a dimming signal on the basis of an energizing electric signal that changes according to the dimming operation terminal device and transmit via a first electric insulating section a signal for controlling the output electric energy of the power converting section according to the dimming signal. | 12-26-2013 |
20140117874 | Power Supply Device and Luminaire - According to one embodiment, a control unit subjects a light-emitting element to constant current control in a dimming degree region shallower than a dimming degree set in advance and subjects the light-emitting element to constant voltage control or constant power control in a dimming degree region deeper than the dimming degree set in advance. When a dimming signal having a deepest dimming degree equivalent to extinction of the light-emitting element is input in a lighting state of the light-emitting element, the control unit gradually reduces an optical output of the light-emitting element from an immediately preceding dimming degree to extinguish the light-emitting element. | 05-01-2014 |
20140153250 | Lamp and Luminaire - According to an embodiment, a lamp main body, a lighting device, a reflecting member and a light-emitting module are provided. The lamp main body includes a case and a cap member attached to the case. The case includes an opening at one end and a hole in the other end center. The cap member integrally includes a projection insertable into the hole. The lighting device and the reflecting member are housed in the case. The lighting device includes a circuit board. The reflecting member configured to reflect light to the outside of the lamp main body includes a reflecting cylinder section including a small-diameter opening and a large-diameter opening. The diameter of the cylinder section expands further toward the large-diameter opening side. The light-emitting module is arranged on the projection to be capable of transmitting heat to the projection. | 06-05-2014 |
20140169004 | Lamp Device and Luminaire - A lamp device includes a semiconductor light-emitting element. The lamp device includes a housing including a heat conductive part, and the heat conductive part is thermally connected to an external thermal radiator. Heat generated by the semiconductor light-emitting element is conducted to the thermal radiator through the heat conductive part. A thermosensor is thermally connected to the heat conductive part. The lamp device includes a lighting circuit to light the semiconductor light-emitting element, and the lighting circuit controls an output of the semiconductor light-emitting element according to detection of the thermosensor. | 06-19-2014 |
20150091448 | POWER SUPPLY CIRCUIT AND LUMINAIRE - 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. | 04-02-2015 |
20150091459 | Power Supply Circuit and Luminaire - 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. | 04-02-2015 |
20150091460 | Power Supply Circuit and Luminaire - 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. | 04-02-2015 |
20150091465 | Power Supply Circuit and Luminaire - 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. The control section controls supply of the driving voltage to the first and second drivers and a stop of the supply. | 04-02-2015 |