Patent application number | Description | Published |
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 |
20110074290 | SELF-BALLASTED LAMP AND LIGHTING EQUIPMENT - 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. | 03-31-2011 |
20110074291 | LIGHT-EMITTING MODULE, SELF-BALLASTED LAMP AND LIGHTING EQUIPMENT - A light-emitting module includes a module substrate, semiconductor light-emitting elements and a connection substrate. On one face of the module substrate, a conductive layer is formed. The semiconductor light-emitting elements and the connection substrate are mounted on the conductive layer of the module substrate. Electric wires, which extend from a lighting circuit, are connected to the connection substrate. Power is supplied to the semiconductor light-emitting elements through the connection substrate and the conductive layer of the module substrate. | 03-31-2011 |
20110279062 | DC POWER SUPPLY UNIT AND LED LIGHTING APPARATUS - In one embodiment, a DC power supply unit includes a DC power supply source; a load circuit connected to an output end of the DC power supply source; a load state detection device to detect a load voltage or an electric quantity corresponding to the load voltage; and a control device to receive the detected output of the load state detection device. The control device controls a maximum output voltage of the DC power supply source so that the voltage difference between the maximum output voltage of the DC power supply source and the load voltage at the time of normal operation falls within a predetermined range in which arc discharge is suppressed. | 11-17-2011 |
20110316444 | POWER SOURCE UNIT AND LIGHTING FIXTURE - According to one embodiment, there is provided a lighting fixture including a fixture body, straight-tube type LED lamps each having semiconductor light emitting elements, and a dedicated power source for lighting the semiconductor light emitting elements. The dedicated power source outputs current having a trapezoidal waveform a period of a peak portion of which is 54% or more of one cycle, and thus lights the semiconductor light emitting elements. | 12-29-2011 |
20110316445 | LED LAMP SYSTEM - An LED lamp system which suppresses flickering of an LED element is provided. | 12-29-2011 |
20120019166 | POWER SOURCE UNIT FOR LED LAMPS, AND LED LAMP SYSTEM - A dedicated power source for LED lamps capable of reliably detecting attachment of an LED lamp is provided. | 01-26-2012 |
20120056560 | DC POWER SOURCE UNIT AND LED LAMP SYSTEM - A DC power source unit | 03-08-2012 |
20120187864 | LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a lighting circuit. The lighting circuit includes a direct-current power supply and a DC-DC converter, and lights an illumination lamp by constant-current control. An output capacitor is connected in parallel to an output end of the DC-DC converter. A capacitance of the output capacitor is set to such a value that a peak value of a pulse-like current flowing when the illumination lamp is instantaneously detached from and attached to the output end of the DC-DC converter is one or more and four or less times a load current of the illumination lamp. | 07-26-2012 |
20120187870 | LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a lighting circuit and a control circuit. The lighting circuit includes an output end to which an illumination lamp is connected, and lights the illumination lamp by a direct-current power. The control circuit controls the lighting circuit so that power consumption caused by a contact resistance at a connection part between the illumination lamp and the output end of the lighting circuit during whole light lighting of the illumination lamp does not exceed a specified value set to 8 W or less. | 07-26-2012 |
20120194075 | LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a power supply circuit and a control circuit. The power supply circuit lights a light source. The control circuit determines a threshold based on an output from the power supply circuit to the light source, and controls the power supply circuit to cause a protecting operation to be performed when an output voltage of the power supply circuit deviates from the threshold. | 08-02-2012 |
20120217899 | LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a control circuit that includes a threshold for a case where a pair of the illumination lamps are connected in series between a positive output end and a negative output end of a power supply circuit, and a threshold for a case where one illumination lamp is connected between the positive output end and the negative output end of the power supply circuit. The control circuit determines the connected lamp number of the illumination lamps to a direct-current power supply device based on a voltage between the positive output end and the negative output end of the power supply circuit and a voltage between a non-potential connection end and the positive output end or the negative output end, and selects the threshold corresponding to the connected lamp number to control the direct-current power supply device. | 08-30-2012 |
20120249004 | LUMINAIRE - When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section. | 10-04-2012 |
20120326614 | LUMINAIRE - According to one embodiment, a luminaire includes a dim lighting circuit, an emergency unit, a dimming-signal input section, and a dimming control circuit. The dim lighting circuit dimly lights a light source at a dimming ratio corresponding to a dimming signal. The emergency unit includes a charging circuit for charging a battery with an external power supply in a normal time and supplies a power supply of the battery to the dim lighting circuit in an emergency. The dimming-signal input section receives the input of the dimming signal from the outside. The dimming control circuit gives the dimming signal input from the dimming-signal input section to the dim lighting circuit in a normal time and gives a dimming signal having a dimming ratio for an emergency to the dim lighting circuit in an emergency. | 12-27-2012 |
20130027924 | TUBE LAMP AND LUMINAIRE - Both ends of a lamp body are mounted on sockets of an apparatus body and a feeding unit configured to feed power to LEDs is provided on the back side facing the apparatus body of the lamp body. | 01-31-2013 |
20130069550 | Power Supply Device and Luminaire - According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply and a power-supply-voltage converting section. The power-supply-voltage converting section includes a plurality of power-supply-voltage converting circuits provided between the rectifying circuit and a plurality of output sections to which loads are respectively connected. Switching elements configured to convert a power supply voltage rectified by the rectifying circuit and supply the power supply voltage to the loads are provided in the plurality of power-supply-voltage converting circuits. The switching elements of the plurality of power-supply-voltage converting circuits are set to at least two different switching frequencies and turned on and off with the respective switching frequencies fixed. | 03-21-2013 |
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 |
20140022778 | LED MODULE, TUBE TYPE LAMP, AND LUMINAIRE - According to one embodiment, an LED module includes a substrate and a Connection circuit. The Connection circuit includes at least two series circuits, in each of which a plurality of LEDs are connected in series. The LEDs of the series circuits different from one another are mixedly arranged along the longitudinal direction of the substrate. | 01-23-2014 |
20140145590 | SELF-BALLASTED LAMP AND LIGHTING EQUIPMENT - 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. | 05-29-2014 |
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 |
20140184087 | LUMINAIRE - When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section. | 07-03-2014 |
20140218905 | Light-Emitting Module, Straight Tube Lamp and Luminaire - According to one embodiment, a light-emitting module includes a rectangular substrate, at least two light-emitting circuits and inter-module connection part. The light-emitting circuit connects plural light-emitting elements in a longitudinal direction of the substrate. The inter-module connection parts include respective pairs of electrodes connected with the respective light-emitting circuits on an end of the substrate in the longitudinal direction. The respective pairs of electrodes are arranged to be closer to side parts of the substrate in a short direction thereof than an arrangement area of the light-emitting elements and are arranged side by side in the longitudinal direction of the substrate. | 08-07-2014 |
20150054414 | LUMINAIRE - When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The dimming control section generates a dimming signal modulated according to the voltage level. Power supply to the dimming control section is performed by an insulated auxiliary power supply. Transmission of the dimming signal is performed via an insulating section. | 02-26-2015 |