Patent application number | Description | Published |
20110049989 | DC-DC CONVERTER CIRCUIT - This inverter circuit includes two switching elements which are turned alternately ON and OFF, and a first primary winding connected in series between these switching elements, and also includes an output transformer having a secondary winding for obtaining an output voltage. This inverter circuit also includes a first voltage source and a second voltage source. The first voltage source applies a voltage to the first switching element via the first primary winding. And the second voltage source applies a voltage to the second switching element via the second primary winding. This inverter circuit also includes a regeneration snubber circuit for regenerating charge accumulated in a snubber capacitor. The regeneration snubber circuit includes a regeneration circuit including a voltage boost section which converts the primary side voltage of the output transformer to a predetermined voltage, which it outputs. | 03-03-2011 |
20110058395 | INVERTER CIRCUIT - This current balanced push-pull type inverter circuit includes first and second switching elements, and an output transformer which includes a first primary winding and a second primary winding connected in series between said first and second switching elements, and also includes a secondary winding for obtaining an output voltage. This inverter circuit also includes a first voltage supply capacitor, a second voltage supply capacitor, and a control unit. A first snubber circuit, in which a first free wheel diode and first and second snubber capacitors are connected in series, is connected in inverse parallel to the first switching element. A first discharge resistor is connected between the first snubber capacitor and a first power supply capacitor, and a second discharge resistor is connected between the second snubber capacitor and a third power supply capacitor. And a second snubber circuit and discharge resistors are connected to the second switching element as well, in a similar manner. | 03-10-2011 |
20110216557 | INVERTER CIRCUIT - This inverter circuit includes first and second switching elements and an output transformer which is provided with a first primary winding connected in series between said first and second switching elements, and also with a secondary winding for obtaining an output voltage. The inverter circuit is further provided with a first voltage supply, a second voltage supply, and a control unit. The first voltage supply applies voltage to said first switching element via said first primary winding. And the second voltage supply applies voltage to said second switching element via said second primary winding. The control unit turns said first switching element and said second switching element alternatingly ON and OFF. This inverter circuit also includes first and second regeneration snubber circuits for regenerating the charge charged into snubber capacitors. | 09-08-2011 |
20110280048 | DC-DC CONVERTER CIRCUIT - This DC-DC converter circuit includes a switching circuit which switches a DC power supply with a primary side switching element, a transformer to a primary side winding whereof the output of the switching circuit is applied and which outputs a voltage which has been changed by a predetermined voltage change ratio to a secondary side winding, and secondary diodes for current adjustment connected to the secondary side winding of the transformer. Moreover, it includes a regeneration snubber circuit connected in parallel with the secondary diode circuit and including a series circuit of a discharge blocking diode and a snubber capacitor and a switching element for regeneration connected in parallel with the discharge blocking diode, a filter circuit connected between rectification outputs of the secondary diode circuit, and a control unit which turns the switching element for regeneration ON a predetermined time period after the timing of turning the primary side switching element OFF. The predetermined time period is set to approximately the time period during which the charge, accumulated in the snubber capacitor due to reverse recovery time when one of the secondary diodes has been turned OFF, discharges. | 11-17-2011 |
20110280054 | INVERTER CIRCUIT - This inverter circuit includes first and second switching elements and an output transformer which has a first primary winding connected in series between the first switching element and the second switching element and a second primary winding for obtaining an output voltage. The inverter circuit also includes a first voltage source, a second voltage source, and a control unit. The first voltage source is connected between a first connection point at which the first primary winding is connected to the second switching element, and the first switching element, and applies a voltage to the first switching element via the first primary winding. And the second voltage source is connected between a second connection point at which the first primary winding is connected to the first switching element, and the second switching element, and applies a voltage to the second switching element via the first primary winding. The control unit alternately turns the first switching element and the second switching element ON and OFF. And this inverter circuit also may include first and second recovery snubber circuits for recovering electrical charge in snubber capacitors. | 11-17-2011 |
20120243263 | DC-DC CONVERTER CIRCUIT - This DC-DC converter circuit includes: first and second switching elements (S | 09-27-2012 |
Patent application number | Description | Published |
20090073712 | LAMP UNIT FOR VEHICLE HEADLAMP AND VEHICLE HEADLAMP - A lamp unit for a vehicle headlamp includes a projection lens disposed on an optical axis extending in a longitudinal direction of a vehicle and a plurality of light source units disposed rearwards of a rear focal plane of the projection lens. Each of the light source units includes a light emitting device; and a light guiding member having a front end light output port and adapted to guide light from the light emitting device to the front end light output port so as to allow the light be emitted from the front end light output port. The front end light output ports of the light guiding members of the respective light source units are arranged adjacent to each other in a horizontal direction in a vicinity of the rear focal plane. | 03-19-2009 |
20090190323 | AUTOMOTIVE HEADLAMP APPARATUS AND METHOD OF CONTROLLING AUTOMOTIVE HEADLAMP APPARATUS WHERE HIGH BEAM ILLUMINATION AREA IS CONTROLLED - An automotive headlamp apparatus is provided with a light source for producing a high beam and a controller for controlling illumination from the light source. Given that at least a portion of a high beam illumination area illuminated by the light source is vertically divided into a plurality of blocks, the controller controls illumination from the light source such that a plurality of first regions having a predetermined horizontal width are formed at least in some of the blocks toward the bottom, and that a second region having a greater horizontal width than the first regions is formed in the block toward the top. | 07-30-2009 |
20090190324 | AUTOMOTIVE HEADLAMP APPARATUS AND METHOD OF CONTROLLING AUTOMOTIVE HEADLAMP APPARATUS WHERE LIGHT DISTRIBUTION PATTERN IS CONTROLLED - An automotive headlamp apparatus includes a light source for producing a high beam and a headlamp apparatus controller for controlling illumination from a light source. The headlamp apparatus controller divides a light distribution pattern of a high beam formed by illumination from the light source into a plurality of regions and controls illumination from each of the individual regions as divided so as to supplement a light distribution pattern of a low beam. | 07-30-2009 |
20090290372 | VEHICLE HEADLAMP - In a vehicle headlamp, a light source image forming device forms a first light source image and a second light source image. A projection lens projects the first light source image and the second light source image so as to have a common border with each other. The light source image forming device forms the first light source image and the second light source image at positions spaced apart from each other along respective edges forming the common border. | 11-26-2009 |
20110141753 | VEHICLE HEADLAMP - A vehicle headlamp includes a first light source configured to emit first light that is projected to form a first irradiation region, a second light source configured to emit second light that is projected to form a second irradiation region joined to the first irradiation region to extend in a transverse direction with respect to an optical axis, a movable shade configured to move between a position at which light irradiation to a joined region of the first irradiation region and the second irradiation region is shielded, and a position at which the light irradiation to the joined region is permitted, and a controller configured to select one of light distribution patterns that are determined by combinations of turning on and off of the first light source, turning on and off of the second light source, and the positions of the movable shade. | 06-16-2011 |
20110279304 | MILLIMETER WAVE RADAR-EQUIPPED HEADLAMP - A millimeter wave radar-equipped headlamp includes a millimeter wave radar that detects an object ahead of a vehicle, and a lighting device unit that irradiates an area ahead of the vehicle. The lighting device unit incorporates an antenna module of the millimeter wave radar. The lighting device unit includes a projection lens, a light source, a reflector, and a shade. The antenna module includes a millimeter wave waveguide, and a millimeter wave reflection mirror. A reflection surface of the millimeter wave reflection mirror is formed by a spheroidal surface having a first focal point located in the vicinity of the opening of the millimeter wave waveguide, and a second focal point located forward of the rear focal point. | 11-17-2011 |
20130038736 | OPTICAL UNIT, VEHICLE MONITOR, AND OBSTRUCTION DETECTOR - Disclosed is an optical unit wherein a rotating reflector rotates about a rotation axis in one direction, while reflecting light emitted from a light source. The rotating reflector is provided with a reflecting surface such that the light reflected by the rotating reflector, while rotating, forms a desired light distribution pattern, said light having been emitted from the light source. The light source is composed of light emitting elements. The rotation axis is provided within a plane that includes an optical axis and the light source. The rotating reflector is provided with, on the periphery of the rotation axis, a blade that functions as the reflecting surface. | 02-14-2013 |
20140071706 | VEHICULAR LAMP - A vehicular lamp includes a projection lens, a two-dimensional image forming device located on or in the vicinity of a rear focal point of the projection lens, and including a plurality optical elements which are arranged in a matrix shape and individually driven and a projection plane that is formed by the plurality optical elements, a light source configured to irradiate the projection plane of the two-dimensional image forming device with light, and a dimming part provided between the optical elements and the projection lens and configured to reduce light directed to the projection lens from the optical elements arranged on an end portion of the projection plane. | 03-13-2014 |
Patent application number | Description | Published |
20090231866 | VEHICLE HEADLAMP APPARATUS - A vehicle headlamp apparatus is provided. The vehicle headlamp apparatus includes a lamp unit, a first additional lamp unit which forms a first light distribution pattern, a second additional lamp unit which forms a second light distribution pattern overlapping with the first light distribution pattern, and a controller. The first light distribution pattern includes at least one first partial region, and the first additional lamp unit adjusts a luminous intensity of a light to be irradiated toward the first partial region. The second light distribution pattern includes at least one second partial region which partially overlaps with the first partial region, and the second additional lamp unit adjusts a luminous intensity of a light to be irradiated toward the second partial region. The controller controls the first additional lamp unit and the second additional lamp unit to adjust the luminous intensity of the partial regions. | 09-17-2009 |
20090231873 | VEHICLE HEADLAMP APPARATUS - A vehicle headlamp apparatus is provided. The vehicle headlamp apparatus includes a low beam lamp unit which forms a low beam distribution pattern having a cutoff line along an upper edge thereof, and an additional lamp unit which forms an additional light distribution pattern including an area above the cutoff line of the low beam distribution pattern. The additional lamp unit is configured such that a luminous intensity of at least a portion of the additional light distribution pattern increases toward a horizontal line from above. | 09-17-2009 |
20130314936 | VEHICULAR HEADLAMP - A vehicular headlamp includes: a plurality of semiconductor light emitting element chips; and a reflector that has a reflection surface with a paraboloid shape, and that reflects, by the reflection surface, light from the semiconductor light emitting element chips so as to send the light in a headlamp beam direction of the vehicular headlamp, wherein the plurality of semiconductor light emitting element chips are arranged along a plane perpendicular to the headlamp beam direction, and a focal point of the reflection surface of the reflector is disposed in or near an area between the semiconductor light emitting element chips that are next to each other. | 11-28-2013 |
20140042325 | OBSTACLE DETECTING DEVICE - An obstacle detecting device includes: a light source having both LED units each for emitting visible light and an infrared light unit for emitting infrared light; and a rotating reflector configured to be rotated in one direction around a rotational shaft while reflecting the visible light and the infrared light emitted from the light source. The rotating reflector is configured, by its rotating movement: to emit the visible light from each of the LED units as an irradiation beam such that a first light distribution pattern is formed by scanning with the irradiation beam; and to emit the infrared light from the infrared light unit as an irradiation beam such that a second light distribution pattern is formed by scanning with the irradiation beam. | 02-13-2014 |
20140043805 | OPTICAL UNIT - An optical unit includes: a light source having both a first light emitting element for emitting light having a first color and a second light emitting element for emitting light having a second color that is different from the first color; and a rotating reflector configured to be rotated in one direction around a rotational shaft, while reflecting the light having the first color and the light having the second color, which have been emitted from the light source. In the rotating reflector, a reflecting surface is provided such that a predetermined light distribution pattern is formed with the light having the first color and the light having the second color, which have been reflected by the rotation of the rotating reflector, being superimposed one on another. | 02-13-2014 |
20140092618 | OPTICAL UNIT - An optical unit includes a lens through which light emitted from a light source enters from behind and the light emits frontward as an irradiation beam. A rotation lens moves periodically, and a front part is scanned with the irradiation beam, so that a predetermined irradiated region can be formed. The rotation lens may be configured such that the lens rotates about a rotation axis connected to a drive part and such that the direction of light, which emits from the light source and is then refracted when the light passes through the lens, varies periodically. | 04-03-2014 |