Patent application number | Description | Published |
20080297062 | ILLUMINATING DEVICE - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 12-04-2008 |
20100097007 | LIGHT-EMITTING DIODE LIGHTING DEVICE - There is provided an LED lighting device having a satisfactory temperature characteristic and a small amount of variation in output current. The step-down chopper is provided with a first circuit including the switching element, the impedance means and a first inductor connected in series and a second circuit including the first inductor and a diode connected in series. A self-excited drive signal generation circuit is provided with a second inductor magnetically coupled with the first inductor and applies a voltage induced in the second inductor to the switching element to keep the switching element on. A turn-off circuit outputs an output voltage when the voltage of the impedance means detected by a comparator exceeds the reference value, and the output voltage allows a switching element to turn on to short-circuit the output terminals of the self-excited drive signal generation circuit, resulting in that the switching element is turned off. | 04-22-2010 |
20100270935 | LIGHT-EMITTING DEVICE AND ILLUMINATION APPARATUS - A light-emitting device and an illumination apparatus are disclosed. A plurality of LED elements are connected in series between positive and negative lines, and first bypass capacitor is connected in parallel to the LED elements respectively. Each series circuit of a predetermined number of LED elements is connected in parallel to second bypass capacitors. As a result, with the negative power line set as a grounding point, the AC impedance at connection points of the series circuit of the LED elements against the ground is reduced. Thus, the erroneous lighting or “flicker” of each LED which otherwise might be caused by an external noise is prevented. | 10-28-2010 |
20100277083 | LIGHTING DEVICE - According to one embodiment, a lighting device includes a device board, a rectification device connected to a commercial power supply, a series LED circuit, and a transistor (current limiter) which limits a maximum current flowing through the series LED circuit. The series circuit mounted on the device board is configured by connecting in series a plurality of LED elements. Each of the LED elements lights when an output voltage of the rectification device is applied to the series circuit. A number of LED elements included in the series circuit is set in a manner that a voltage applied to the series LED circuit is 70 to 90% of the output voltage of the rectification device. | 11-04-2010 |
20110057564 | LED LIGHTING DEVICE AND ILLUMINATION APPARATUS - The present invention provides a rectifying circuit for rectifying AC voltage that is input from an AC source via a phase control type dimmer; a converter for converting DC output voltage of the rectifying circuit and lighting an LED; a positive characteristic feed-forward controlling unit for monitoring the AC voltage and changing the output current of the converter in accordance with a value of the AC voltage; and a positive characteristic feed-forward control limiting unit for, when the AC voltage reaches a predetermined value, limiting control performed by the positive characteristic feed-forward controlling unit. | 03-10-2011 |
20110057576 | POWER SUPPLY DEVICE AND LIGHTING EQUIPMENT - In a power supply device according to one embodiment, a reference signal Vref | 03-10-2011 |
20110057577 | POWER SUPPLY DEVICE AND LIGHTING EQUIPMENT PROVIDED WITH POWER SUPPLY DEVICE - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 03-10-2011 |
20110057578 | LED LIGHTING DEVICE AND ILLUMINATION APPARATUS - The present invention provides a pair of input terminals to which AC voltage is input, the AC voltage being phase-controlled by a dimmer for phase-controlling AC voltage of an AC source; a damping circuit which has a resistor inserted to a position, into which input current flows from the AC source via the dimmer in series, and a capacitor and an inductor which form a closed circuit together with the AC source and the dimmer, and suppresses high-frequency vibration generated in the dimmer when a phase control element of the dimmer is turned on; and an LED lighting circuit which rectifies AC voltage phase-controlled and input via the pair of input terminals, converts DC output voltage, which is obtained by rectification, so that the voltage adapts to a load, and lights the LED. | 03-10-2011 |
20110068706 | LED LIGHTING DEVICE AND ILLUMINATION APPARATUS - The present invention provides an LED lighting device including: a rectifying circuit having AC input ends connected to an AC source; a converter which has input ends connected to DC output ends of the rectifying circuit and output ends, to which an output capacitor is connected in parallel, connected to an LED, and lights the LED; a control unit for changing continued DC output current of the converter in accordance with a dimming degree; and a bypass circuit which is connected to the output ends of the converter in parallel with the output capacitor and makes bypass current flow, the bypass current being larger than lighting current, which flows through the LED, at least in the vicinity of a dimming lower limit. | 03-24-2011 |
20110261572 | LIGHTING FIXTURE - There is provided a lighting fixture | 10-27-2011 |
20120002429 | SOCKET DEVICE, LAMP DEVICE AND LIGHTING DEVICE - There is provided a lighting fixture capable of efficiently radiating heat of a lamp device attached to a socket device. | 01-05-2012 |
20120299482 | LIGHT EMITTING DEVICE, DISPLAY DEVICE, AND METHOD OF DRIVING ORGANIC ELECTROLUMINESCENT DEVICE - According to one embodiment, there is provided a light emitting device including an organic electroluminescent device that includes a first electrode, a light emitting layer arranged above the first electrode, and a second electrode arranged above the light emitting layer, a drive circuit that supplies a drive current between the first electrode and the second electrode to drive the organic electroluminescent device, and a drive stop circuit that stops the driving of the organic electroluminescent device when a value of the drive current falls below a predetermined value. | 11-29-2012 |
20120319613 | Illuminating Device - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 12-20-2012 |
20120320565 | Lighting System - A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated. | 12-20-2012 |
20120320609 | Socket Device - A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated. | 12-20-2012 |
20120320610 | Socket Device - A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated. | 12-20-2012 |
20120320611 | Socket Device - A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated. | 12-20-2012 |
20120326620 | Illuminating Device - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 12-27-2012 |
20130088173 | POWER SUPPLY DEVICE AND LIGHTING EQUIPMENT - In a power supply device according to one embodiment, a reference signal Vref | 04-11-2013 |
20130134879 | Luminaire - According to one embodiment, a luminaire includes a housing, a cable run, and a noise filter circuit. A lighting-circuit-integrated lamp is arranged in the housing. The cable run is configured to supply an external power to the lighting-circuit-integrated lamp. The noise filter circuit is provided in the cable run and reduces a noise terminal voltage. | 05-30-2013 |
20130187563 | DIMMING DEVICE AND LIGHTING SYSTEM - According to one embodiment, a control section receives supply of control power from a control power supply section through a capacitive element and divides, a period of each half cycle of an alternating-current voltage into a first section, a second section, and a third section. In the first section, the control section subjects a switch section to conduction control to supply electric power to a load and stops a converting action of the control power supply section. In the second section, the control section subjects the switch section to non-conduction control to interrupt the power supply to the load and stops the converting action of the control power supply section. In the third section, the control section subjects the switch section to the non-conduction control to interrupt the power supply to the load and causes the converting action of the control power supply to operate. | 07-25-2013 |
20130193863 | Power Supply Device and Lighting Equipment Provided with Power Supply Device - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 08-01-2013 |
20130193880 | Power Supply Device and Lighting Equipment Provided with Power Supply Device - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 08-01-2013 |
20130257304 | Switching Power Source Device and Illuminating Apparatus - A switching power source device includes: a direct power source; and a chopper circuit including a pair of input terminals connected to the direct power source and a pair of output terminals connected to a load, the chopper circuit including a first inductor, a second inductor magnetically coupled to the first inductor, a third inductor connected to the first inductor, a switching element causing an augmented current to flow from the direct power source to the first and third inductors while turned on, a constant current element connected to the switching element in series, a rectifier element causing a reduced current to flow through the first and third inductors while the switching element is turned off, and a drive circuit controlling and turning off a gate voltage of the switching element after the switching element is turned on and the augmented current reaches a constant current element saturated state. | 10-03-2013 |
20140015432 | POWER SUPPLY, SOLID-STATE LIGHT-EMITTING ELEMENT LIGHTING DEVICE, AND LUMINAIRE - According to one embodiment, a power supply device includes a full-wave rectifier, a power converting circuit, and a partial smoothing circuit. The power converting circuit converts an output of the full-wave rectifier into a direct-current voltage according to a switching action of a switching element. The partial smoothing circuit includes, in series, a capacitor and a first diode connected in polarity opposite to output polarity of the full-wave rectifier. The partial smoothing circuit is provided on an output side of the full-wave rectifier in parallel to the power converting circuit. In the partial smoothing circuit, the capacitor is charged according to the switching action of the switching element of the power converting circuit. The partial smoothing circuit supplies charged electric of the capacitor to the power converting circuit via the first diode in a trough portion of an output voltage of the full-wave rectifier. | 01-16-2014 |
20140035487 | Illuminating Device - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 02-06-2014 |
20140042931 | Illuminating Device - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 02-13-2014 |
20140049188 | Illuminating Device - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 02-20-2014 |
20140132168 | Power Supply Device and Lighting Equipment Provided with Power Supply Device - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 05-15-2014 |
20140132170 | Power Supply Device and Lighting Equipment Provided with Power Supply Device - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 05-15-2014 |
20140132171 | Power Supply Device and Lighting Equipment Provided with Power Supply Device - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 05-15-2014 |
20140159604 | Power Supply Circuit and Luminaire - A power supply circuit includes a power converting unit, a current adjusting unit, and a control unit. The power converting unit is configured to convert an alternating-current voltage into a direct-current voltage and supply the direct-current voltage to a load. The alternating-current voltage is subjected to conduction angle control and is supplied via a power supply path. The current adjusting unit includes a branch path electrically connected to the power supply path and can switch a first path state and a second path state. The first path state feeds a part of an electric current flowing through the power supply path to the branch path. The control unit detects a conduction angle of the alternating-current voltage, controls the conversion of the direct-current voltage by the power converting unit according to the detected conduction angle, and controls the current adjusting unit according to the detected conduction angle. | 06-12-2014 |
20140232281 | Rectifier Circuit and Power Source Circuit - According to an embodiment, a rectifier circuit includes a first diode, a switching element, and a second diode. The first diode is connected between a first terminal and a second terminal so that a direction toward the first terminal from the second terminal is in a forward direction. The switching element has a first main electrode connected to the first terminal, a second main electrode connected to a cathode of the first diode, and a gate electrode connected to an anode of the first diode. The second diode is connected in parallel with respect to the switching element so that a direction toward the first terminal from the cathode of the first diode is in a forward direction, between the first main electrode and the second main electrode of the switching element. | 08-21-2014 |
20140285089 | Power Supply Circuit and Illuminating Device - According to one embodiment, a power supply circuit includes: a DC-DC converter which converts a first DC voltage supplied from a power supply flow path into a second DC voltage having a different absolute value, to supply the voltage to a DC load; and an overcurrent protection unit which is electrically connected to an end portion of the DC load on a low potential side, and performs feedback control of the DC-DC converter based on current which flows to the DC load. The DC-DC converter includes a normally-on type switching element. The overcurrent protection unit is electrically connected to the third electrode. When the current which flows to the DC load is greater than a reference value, the overcurrent protection unit changes the state of the switching element from the first state to the second state by decreasing the potential of the third electrode. | 09-25-2014 |
20140285099 | Power Supply Circuit and Illumination Apparatus - According to one embodiment, there is provided a power supply circuit including a power conversion unit, a current regulator, a controller, and a controller power supply. The power conversion unit converts an AC voltage with a controlled conduction angle into a different voltage. The current regulator includes a branch path electrically connected to the power supply path and switches between a first state in which a part of a current flowing through the power supply path flows to the branch path and a second state in which a current flowing to the branch path is lower than that of the first state. The controller switches the current regulator to the second state in at least a part of a conduction period of a detected conduction angle and switches the current regulator to the first state in a blocking period of the detected conduction angle. | 09-25-2014 |
20140285100 | Power Supply Circuit and Illumination Apparatus - According to one embodiment, provided is a power supply circuit including a power conversion unit, a controller, and an integrated circuit. The power conversion unit converts an AC voltage into a different voltage. The integrated circuit includes a current regulator that can switch between a first state in which a part of a current flowing through the power supply path flows to an input terminal and a second state in which a current flowing to the input terminal is lower than that of the first state, a controller power supply that converts a voltage into a driving voltage and supplies the driving voltage to the controller, a connection terminal for connecting an auxiliary power supply used for generating the driving voltage, and a protection circuit that blocks or decreases, when an auxiliary power supply voltage of the auxiliary power supply decreases, a current flowing to the input terminal. | 09-25-2014 |
20140285101 | Lighting Power Source and Lighting Device - According to one embodiment, a lighting light source including a current control element and a voltage-dividing resistor is provided. The current control element has a first main electrode, a second main electrode series-connected with respect to a lighting light source, and a first control electrode for controlling a current flowing between the first main electrode and the second main electrode, and controls a current supplied to the lighting light source. The voltage-dividing resistor is parallel-connected with respect to the lighting light source and connected to the first control electrode, and inputs a voltage obtained by division of a voltage of the lighting light source to the first control electrode. | 09-25-2014 |
20140285176 | Power-Supply Circuit and Luminaire - According to one embodiment, there is provided a power-supply circuit including a substrate, a chopper circuit, a conductive member, first capacitative elements, and second capacitative elements. The substrate includes a mounting surface. The chopper circuit is provided on the mounting surface, includes input ends, output ends, and a switching element, and converts a voltage input from the input ends and outputs the voltage from the output ends according to switching driving of the switching element. The conductive member is adjacent to at least a part of the chopper circuit. The first capacitative elements are electrically connected between the input ends and the conductive member and capacitively couple the input ends and the conductive member. The second capacitative elements are electrically connected between the output ends and the conductive member and capacitively couple the output ends and the conductive member. | 09-25-2014 |
20150084510 | Power Supply Device and Luminaire - 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. | 03-26-2015 |
20150084528 | Power Supply Device and Luminaire - 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. | 03-26-2015 |
20150084529 | Power Supply Device, Luminaire, and Lighting System - 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. | 03-26-2015 |
20150084530 | Power Supply Device and Luminaire - 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. | 03-26-2015 |
20150084531 | Power Supply Device and Luminaire - 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. | 03-26-2015 |
20150085544 | Rectifying Circuit, Electronic Circuit, and Electronic Apparatus - 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. | 03-26-2015 |