Patent application number | Description | Published |
20100045193 | ORGANIC ELECTROLUMINESCENT LIGHT EMITTING DEVICE FOR RESTORING NORMAL OPERATION AFTER LOW-VOLTAGE ERRORS - Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current. | 02-25-2010 |
20100072908 | DISCHARGE LAMP LIGHTING DEVICE - There has conventionally been provided a discharge lighting device capable of performing dimming control of a hot cathode type discharge lamp. As a tube current is decreased, a filament temperature is decreased, and as the tube current is further decreased, discharge cannot be maintained, which in turn causes moving striations and flickering. The conventional device requires power supplies for controlling the tube current of the hot cathode type discharge lamp and for controlling a filament current, and has therefore a problem that a circuit becomes complicated, and the number of parts is increased, resulting in an increase in cost. | 03-25-2010 |
20100079232 | MULTI-LAYERED DEVICE - A multilayered device comprises an insulation sheet | 04-01-2010 |
20100213833 | ORGANIC EL MODULE - An organic electroluminescence (EL) module capable of reducing a processing loss of wiring boards for supplying power to an anode and a cathode is provided. Each wiring board ( | 08-26-2010 |
20100219768 | LIGHT CONTROL APPARATUS AND LIGHTING APPLIANCE USING THE SAME - It is an object to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source. | 09-02-2010 |
20100244704 | LIGHT CONTROL APPARATUS AND LIGHTING APPLIANCE USING THE SAME - It is objected to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control and to elongate operative life of a light source. The lighting appliance comprises a light source | 09-30-2010 |
20110101875 | LIGHT EMITTING DEVICE - A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected. | 05-05-2011 |
20110169422 | PLANAR LIGHT-EMITTING MODULE LIGHTING CIRCUIT AND ILLUMINATING DEVICE - A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start. | 07-14-2011 |
20130076246 | LIGHTING CIRCUIT FOR LIGHT EMITTING ELEMENT AND ILLUMINATION APPARATUS INCLUDING SAME - A light-emitting-element lighting circuit for dimming a light emitting element having a diode characteristic by a PWM dimming signal is provided. The lighting circuit includes a dimming signal conversion unit configured to generate the PWM dimming signal having a duty ratio corresponding to an emission level specified by an input dimming signal. The lighting circuit further includes a minimum current generating circuit configured to flow a minimum current during an OFF period of the PWM dimming signal generated by the dimming signal conversion unit such that a voltage greater than a threshold voltage designed to allow the light emitting element to emit a light is applied to the light emitting element, and the light emitting element emits a light of a brightness equal to or less than a lowest emission level specified by the dimming signal. | 03-28-2013 |
20130127339 | ORGANIC EL ILLUMINATION MODULE AND ILLUMINATION APPARATUS INCLUDING SAME - An organic EL module includes a flat plate-like light emitting panel configured to use an organic EL element; and a holding member configured to hold the light emitting panel. The holding member includes: a conductive member serving as at least a part of the holding member, and a capacitance component is provided between the conductive member and an electrode layer, the electrode layer being provided in the light emitting panel to supply a driving voltage thereto. | 05-23-2013 |
20130127366 | LIGHTING CIRCUIT FOR LIGHT EMITTING ELEMENT AND ILLUMINATION APPARATUS INCLUDING SAME - A light-emitting-element lighting circuit for dimming a light emitting element by a PWM dimming signal of a duty ratio corresponding to an input dimming signal is provided. The lighting circuit includes a PWM dimming signal generating unit which generates the PWM dimming signal by performing a summation of AC wave signals including a fundamental wave and harmonics of different frequencies that are integer multiples of a fundamental frequency of the fundamental wave. The fundamental frequency is equal to or higher than a frequency, at which a sound pressure level is at maximum, in an audible frequency range in a correlation spectrum between the sound pressure level generated from the light emitting element and a frequency of an AC wave signal inputted to the light emitting element. | 05-23-2013 |
20130279181 | LIGHTING APPARATUS - A lighting apparatus includes: a light source unit that has a case storing therein a light-emitting panel and a wiring board mounted on a non-light emitting face thereof; and an attachment unit that has a housing storing therein a circuit board and configured to be detachably attached to the light source unit. The case has a wiring board storage. The housing has a circuit board storage. The case and the housing are arranged such that a whole of the wiring board storage and a whole of the circuit board storage are arranged at different positions in a direction perpendicular to an attachment direction of the light source unit and the attachment unit. | 10-24-2013 |
20140071680 | LIGHTING APPARATUS AND LIGHTING APPARATUS ASSEMBLY USING THE SAME - A lighting apparatus includes a light-emission unit having plate shape; and a base unit configured to be detachably attached thereto the light-emission unit. The base unit has substantially rectangular shape. The base unit includes a power supply rail for supplying electricity to the light-emission unit and a support section supporting the light-emission unit. The power supply rail has rail-shape and extending in a longitudinal direction of the base unit. The light-emission unit includes a luminescent panel, a control circuit configured to control lighting of the luminescent panel and an electrically conductive connection terminal electrically connecting the control circuit to the power supply rail. The base unit is formed so as to be capable of being attached thereto a plurality of the light-emission units along the longitudinal direction of the base unit. The connection terminal is connected to an arbitrary point of the rail-shaped power supply rail. | 03-13-2014 |
20150028772 | LIGHT-EMITTING ELEMENT LIGHTING DEVICE, LIGHT-EMITTING MODULE, ILLUMINATING APPARATUS, AND LIGHT-EMITTING ELEMENT LIGHTING METHOD - A light-emitting element lighting device includes: a step-down chopper circuit which outputs a current that flows to a light-emitting element; a current command circuit which selects between a rated mode for passing a rated current for turning ON the light-emitting element and a detection mode for passing an abnormality detection current, which is smaller than the rated current, for detecting an abnormality in the light-emitting element; a voltage detection circuit which detects a voltage across both ends of the light-emitting element; and a control circuit which causes the step-down chopper circuit to stop outputting the current to the light-emitting element, when the voltage across both ends detected by the voltage detection circuit in the detection mode is lower than or equal to an abnormality detection threshold voltage which is set lower than the rated voltage at the time when the light-emitting element is turned ON. | 01-29-2015 |
20150028774 | LIGHT-EMITTING ELEMENT LIGHTING DEVICE, LIGHT-EMITTING MODULE, ILLUMINATING APPARATUS, AND LIGHT-EMITTING ELEMENT LIGHTING METHOD - A light-emitting element lighting device includes: a step-down chopper circuit which outputs current to a light-emitting element; a current command circuit which selects between (i) light-emission mode for causing a light-emission current larger than a constant rated current, which flows to the light-emitting element when continuous light-emission is caused, to flow and (ii) detection mode for causing an abnormality detection current smaller than the rated current, to flow for detecting a light-emitting element abnormality; a voltage detection circuit which detects a both-end voltage of the light-emitting element; and a control circuit which causes the step-down chopper circuit to stop outputting the current to the light-emitting element, when the both-end voltage detected by the voltage detection unit in the detection mode is lower than or equal to an abnormality detection threshold voltage which is set lower than the rated voltage at a time when the light-emitting element is turned ON. | 01-29-2015 |
Patent application number | Description | Published |
20080218094 | Discharge Lamp Ballast, Lighting System and Projector - A discharge lamp ballast. Its starting means comprises a second inductor connected between a first end of a discharge lamp and the positive voltage side of a first capacitor; a second capacitor forming a resonance circuit together with the second inductor; a second switching element connected between the positive terminal of a DC power source and the second end of the lamp; a third switching element connected between the second end of the lamp and the negative voltage side of the first capacitor; and a starting control means that controls both switching elements. The starting control means alternately turns both switching elements on and off so as to contribute resonance voltage of the resonance circuit for starting of the lamp in case of the starting mode. According to the invention, noise from the starting means can be reduced. | 09-11-2008 |
20100052538 | Discharge lamp lighting device, headlight device and vehicle having the same - A discharge lamp lighting device includes: a DC power source; an inverter for inverting the DC power at a predetermined inversion time interval to supply a square wave AC power to a discharge lamp; and a controller for controlling the output power. The controller performs a synchronous operation and controls the DC power source such that DC power outputted during a period other than the output temporarily increasing period in a power increasing period is greater than the DC output power outputted during the period other than the output temporarily increasing period in a rated power period. Further, the controller controls the DC power source such that at least one of an increment of the output power for the output temporarily increasing period and a length of the output temporarily increasing period is less in at least a part of the output increasing period than in the rated power period. | 03-04-2010 |
20100244749 | Method for feeding electric power to a planar light-emitting element - A method for feeding electric power to a planar light-emitting element which includes a planar anode electrode, a planar cathode electrode, a light-emitting layer provided between the anode electrode and the cathode electrode, two or more anode terminal portions protruding from the anode electrode and one or more cathode terminal portions protruding from the cathode electrode. The method includes sequentially providing the electric power to the anode terminal portions. | 09-30-2010 |
20110234104 | LOAD DETERMINATION DEVICE AND ILLUMINATION APPARATUS USING SAME - An illumination load determination device includes an illumination load; a voltage applying unit for applying a voltage to the illumination load; a connection unit for connecting the illumination load and the voltage applying unit; a detection unit for detecting at least one of a current flowing through the illumination load and a voltage across the illumination load when the voltage is applied to the illumination load from the voltage applying unit via the connection unit; and a determination unit for determining a type of the illumination load based on an output from the detection unit. The determination unit has a comparator for comparing a detection value detected by the detection unit to a predetermined threshold, and determines that the illumination load has a capacitance based on an output of the comparator. The voltage applying unit lights on the determined illumination load with a rated driving voltage. | 09-29-2011 |
Patent application number | Description | Published |
20090323033 | DISCHARGE LAMP LIGHTING DEVICE AND IMAGE DISPLAY DEVICE - An output of a load voltage detector is read by an A/D converter, and a reference value Is and a switching frequency are decided by a microcomputer. In order that the decided switching frequency can be achieved, a SET signal is inputted from a switching frequency counting unit to a drive controller, and a switching element is turned on. When a current flowing through the switching element, which is detected by a resistor, exceeds the reference value Is of a reference arithmetic unit, a RESET signal is inputted from a current detector to the drive controller, and the switching element is turned off. Thereafter, the reference value Is and the switching frequency are set so that the switching element can be turned on at the next time at timing when a regenerative current of a diode turns to substantial zero. As described above, the switching frequency is controlled in response to a state of a discharge lamp while controlling the switching element to turn on at the timing when the regenerative current turns to substantial zero without bringing up a cost increase of a discharge lamp lighting device. | 12-31-2009 |
20100033692 | DISCHARGE LAMP LIGHTING DEVICE AND IMAGE DISPLAY APPARATUS - A discharge lamp lighting device includes: a power converting circuit including a step-down chopper circuit ( | 02-11-2010 |
20120098451 | LIGHT EMITTING MODULE DEVICE, LIGHT EMITTING MODULE USED IN THE DEVICE, AND LIGHTING APPARATUS PROVIDED WITH THE DEVICE - A light emitting module device includes: a power line through which power is supplied to light emitting modules; and a signal generation circuit which generates a control signal. The power line is shared by a plurality of the light emitting modules, and has switches and switches which turn on or off current conduction to the light emitting modules, through open/close operations. The signal generation circuit individually controls the switches and the switches. The open/close operations include a light-emission period in which the light emitting module emits light; and an extinction period in which the light emitting module is extinguished, and if there is a control signal to be transmitted to the light emitting module, the control signal is superimposed onto supply power. Since a control signal is superimposed onto supply power to each light emitting module, the light emitting modules can be individually controlled. In addition, since the power line can be used also as a communication line, and the power line can be shared by a plurality of the light emitting modules, the number of lines can be decreased. | 04-26-2012 |
Patent application number | Description | Published |
20120160298 | PHOTOELECTRIC CONVERTER AND MANUFACTURING METHOD THEREOF, AND PHOTOELECTRIC CONVERSION MODULE - A photoelectric converter in which an intermediate layer is provided between a first photoelectric-conversion-layer including a first p-type-semiconductor-layer and a first n-type-semiconductor-layer and a second photoelectric-conversion-layer including a second p-type-semiconductor-layer and a second n-type-semiconductor-layer. The intermediate layer includes an n-type-transparent conductive-oxide-film in contact with the first n-type-semiconductor-layer and a p-type-transparent-conductive oxide-film in contact with the second p-type-semiconductor-layer respectively having a bandgap equal to or higher than 1.5 electron volts. A width of a low carrier concentration region in a film thickness direction, in which a concentration of a free carrier formed near at least one of an interface on which the p-type-transparent-conductive-oxide-film comes into contact with the n-type-transparent-conductive-oxide-film and an interface on which the p-type-transparent-conductive-oxide-film comes into contact with the second p-type-semiconductor-layer is equal to or lower than 1×10 | 06-28-2012 |
20140238476 | PHOTOELECTRIC CONVERSION DEVICE AND MANUFACTURING METHOD THEREOF, AND PHOTOELECTRIC CONVERSION MODULE - A photoelectric conversion device in which a substantially intrinsic i-type amorphous hydrogen-containing semiconductor layer, a p-type amorphous hydrogen-containing semiconductor layer, and a first transparent conductive layer are stacked in this order on a first surface of an n-type semiconductor substrate that generates a photogenerated carrier by receiving light, wherein the first transparent conductive layer includes a hydrogen-containing area formed of a transparent conductive material that contains hydrogen and a hydrogen-diffusion suppression area that is present on a side of the p-type amorphous hydrogen-containing semiconductor layer with respect to the hydrogen-containing area and that is formed of a transparent conductive material that does not substantially contain hydrogen, and the hydrogen-diffusion suppression area has a hydrogen concentration distribution in which a hydrogen content on a side of the p-type amorphous hydrogen-containing semiconductor layer is lower than that on a side of the hydrogen-containing area. | 08-28-2014 |
20140322861 | SOLAR BATTERY, MANUFACTURING METHOD THEREOF, AND SOLAR BATTERY MODULE - A solar battery includes a transparent electrode and a collector electrode in this order on the surface of a light incident surface side of a photoelectric conversion layer. The collector electrode is formed in a predetermined region on the photoelectric conversion layer and a first transparent electrode of the transparent electrode is formed only in a region right under the collector electrode in contact with the photoelectric conversion layer and the collector electrode. A second transparent electrode of the transparent electrode is formed in a region on the photoelectric conversion layer where the collector electrode is not formed and on the collector electrode in contact with the photoelectric conversion layer or the collector electrode. The carrier concentration of the first transparent electrode is higher than the carrier concentration of the second transparent electrode. | 10-30-2014 |