Abstract: A vehicular lamp used for a vehicle, includes a semiconductor light emitting element for generating light to be emitted by the vehicular lamp and a current controlling unit for changing a current supplied to the semiconductor light emitting element based on the speed of the vehicle. The current controlling unit may reduce the current, if the speed of the vehicle is lower than a predetermined speed. The current controlling unit may reduce the current, if the vehicle is stopped.

Abstract: A lamp unit for a vehicular headlamp includes a projection lens disposed on an optical axis extending in a vehicle longitudinal direction and a semiconductor light-emitting element having a light-emitting chip with a lower end edge formed linearly. The semiconductor light-emitting element is disposed in the rear of the projection lens facing forward so as to position the lower end edge 24a1 on the optical axis. The projection lens projects light from a point on the optical axis of the lower end edge within a vertical cross section as parallel light, and projects light from a point on the optical axis of the lower end edge within a horizontal cross section as diffused light.

Abstract: A vehicle lamp has a housing and a transparent cover formed of a transparent resin having a flexural modulus of 2000 MPa or more, and joined to the housing by beam welding. The transparent cover has a first surface and a second surface. The second surface faces the housing, and a welding surface is formed along a circumference of the second surface. The welding surface is formed such that the welding surface has a three-dimensional curved surface in a closed-curve form, and such that each continuing surface of the welding surface is formed as a flat surface with respect to a direction of a normal line thereto or as a curved surface having a curvature radius of 30 mm or more with respect to a direction of a normal line thereto.

Abstract: A plurality of lamp piece units constituting light sources by semiconductor light emitting elements are used as a first lamp piece unit which is lighted in a low beam mode. Additionally, a single lamp piece unit constituting a light source by an electric discharge bulb color temperature of emitted light of which is as high as that of the semiconductor light emitting element, is used as a second lamp piece unit, which is additionally lighted in a high beam mode. When the beam is switched from the low beam to the high beam, pale irradiated light from the first lamp piece unit is added with pale irradiated light from the second lamp piece unit to thereby provide an impression for the driver and/or passenger of unity in colors between the two lamp piece units.

Abstract: A vehicular lamp including a translucent member 14 and a light-emitting element 12 with its front being covered by the translucent member 14; a plurality of lens elements 14s1 and 14s2 being formed on the front surface 14b of the translucent member 14 so that the lens elements are located on a hemispherical surface which is centered upon the light-emitting element 12 and serves as a reference plane B. The front surface 14b of the translucent member 14 is divided in a radial pattern to form a plurality of fan-shaped zones SA and SB, which are further divided into concentric circular shapes to form a plurality of fan-shaped zone bands SA1, SA2, SA3 and SA4, and SB1, SB2 and SB3, respectively, which are provided with the lens elements 14s1 and 14s2 therein.

Abstract: A projector type vehicle headlamp comprises a reflector, a light source, a projection lens, a rotational shade to shield part of light reflected on the reflector so as to be directed towards the projection lens and a motor for driving the rotational shade based on a light distribution switching over operation. In the headlamp, a high beam corresponding light shielding plate and an another beam corresponding light shielding plates are disposed on the rotational shade on both sides of a low beam corresponding light shielding plate, so that the light distributions are attempted to be switched over speedily between the low beam and the another beams and the generation of glare is attempted to be prevented.

Abstract: A part of a reflector is constituted to be able to separate from other general reflecting portion to move downward as a movable reflecting portion. A first additional reflector for reflecting light from a light source to direct forward is arranged at a vicinity on a rear side of the movable reflecting portion. A second additional reflector for reflecting light from the light source to direct forward without transmitting through a projection lens is arranged at a position contiguous downward from the first additional reflector.

Abstract: In a vehicle lighting apparatus in which the irradiation direction of lamps provided at the left and right portions of an automobile can be deflected to the left and right directions in association with the steering operation of a steering apparatus, the deflection angles of the left and right lamps are changed in different manners in accordance with a vehicle speed, for example. For example, at the time of steering to the right, when a vehicle speed is a predetermined value or less, only the right lamp is subjected to the deflecting operation, while when a vehicle speed exceeds the predetermined value, both the right and left lamps are simultaneously subjected to the deflecting operation. The deflection angles of the left and right lamps are differentiated in accordance with the speed change of an automobile.

Abstract: In a lighting apparatus for a discharge lamp, a mask signal against a re-arc voltage is correctly generated to detect a lamp voltage accurately in view of a support to high frequency lighting such that the detection of the lamp voltage is not affected by the re-arc voltage. The lighting apparatus for the discharge lamp comprises a DC-AC converter for receiving an input voltage from a DC power supply to convert the input voltage to an AC voltage; detecting means for detecting a lamp voltage associated with a discharge lamp or a lamp voltage and a lamp current; and a signal generator circuit for generating a mask signal for excluding a re-arc voltage, which occurs at the time the polarity is inverted, from items to be detected, in the event of a detection of the lamp voltage. The signal generator circuit detects the lamp voltage or lamp current or a voltage at an output stage of the DC-AC converter to correctly capture a polarity inversion timing to generate a mask signal against the re-arc voltage.

Abstract: A vehicular lamp for use in an automobile, comprises: a light source module for generating light; an optical member operable to emit the light produced by the light source module out of said vehicular lamp; and a light source fixing member for fixing the light source module to a reference position the relative position of which with respect to the optical member is predetermined, wherein the light source module includes: a reference member which is fixed to be fitted to the reference position when the light source module is fixed to said optical member, a semiconductor light emitting element for emitting light from a lighting region having at least a linear boundary; and a holding member for fitting said linear boundary to a fixing position a relative position of which with respect to said reference position is predetermined, so as to hold said semiconductor emitting light.

Abstract: A light source bulb is fixedly inserted into a lateral direction to the optical axis Ax at a position below an optical axis Ax. Accordingly, a region lateral to the optical axis Ax on a reflection surface of the reflector can be effectively utilized for light distribution control. Furthermore, a first additional reflector having a reflection surface of substantially-spheroidal shape whose first focal point is at a position coincident with the light source is disposed at a position above the optical axis Ax. A second additional reflector 36 having a reflection surface of a substantially-parabolic vertical cross-sectional profile whose focal point is coincident with a second focal point of the first additional reflector is disposed at a position below the optical axis. As a result, light from the light source is illuminated forward without passing through a projection lens.

Abstract: A holder integrated type base board made of synthetic resin integrally molded with a plurality of holders for inserting LEDs on a front face side of a base board main body and a mold therefore. The mold includes a first mold for molding a back face side of the base board main body and a second mold opposed to the first mold for molding the front face side of the base body main body. In addition, the mold includes a holder molding cavity provided at the second mold which is constituted by an insert die capable of being inserted into and detached from the second mold main body. When it is necessary to correct a position of a portion of the holder in a trially fabricated base board, a position of an LED inserting hole in the base board can simply be corrected by drawing the insert die for molding the holder from the mold main body and interchanging the insert die with a new insert die. As such, an entire first mold does not have to be reproduced.

Abstract: A check valve of a cleaning device of a vehicle lamp is provided with a cleaning liquid influx portion, a valve disposing portion, and a cleaning liquid efflux portion which are arranged in series in a sliding direction of the piston. A valve body is disposed in the valve disposing portion. The valve body opens and closes a space between the cleaning liquid influx portion and the cleaning liquid efflux portion, when at least a portion of the valve body moves in a direction substantially perpendicular to a sliding direction of a piston.

Abstract: A vehicular illumination lamp, including four light emitting devices 12 which are disposed in such a manner as to spread about a predetermined point A as a center, a reflector 14 having four reflecting surfaces 14a that are made up of ellipsoids of revolution Er1, which take light emitting centers of the respective light emitting devices 12 and the predetermined point A as primary focal points and secondary focal points thereof, respectively, and a light distribution control member 16, which controls the light distribution of light from the respective light emitting devices 12 that is reflected on the reflector 14 so as to cause the light so controlled to traverse to a front of the lamp, whereby light emitted from the respective light emitting devices 12 is made first to be reflected on the respective reflecting surfaces 14a and is then caused to converge on the predetermined point A.

Abstract: Switching elements S1, S2 connected in series are provided on the secondary side of a pulse transformer T to which an input voltage is supplied from a DC power supply E. On the primary side of the pulse transformer T, switching element S3, S4 are provided, and a regenerating unit RG including a current limiting inductor L1 and a regenerating inductor L2 is connected to the DC power supply E and the primary side of the pulse transformer T. A current is limited by the inductor L1 during an on time of the element S3 or S4, whilst a current is regeneratively supplied to the DC power supply E by using the inductor L2 during the off time of the elements S3, S4.

Abstract: A transformer and discharge lamp lighting device are disclosed. The transformer includes a closed-magnetic circuit type of core having a gap, a primary winding 7p, a secondary winding 7s and a detecting terminal located on the secondary winding 7s or an additional detecting winding separate from the main winding. The primary winding 7p and secondary winding 7s are wound around a portion apart from a gap 14 of a common core column 13 serving as a center axis. The primary winding 7p is formed of a sheet- or film-like conductor, and the winding portion of the primary winding 7p is arranged so as to include the winding portion of the secondary winding 7s in the direction along the center axis of the core column 13.

Abstract: A discharge lamp lighting circuit has a structure of a voltage resonance type including a transformer and a switching element to be provided on a primary side thereof as a DC—DC converting circuit for converting a DC input voltage into a desirable DC voltage. The lighting circuit further includes a control circuit serving to ON/OFF control the switching element, thereby controlling an output voltage Vout of the DC—DC converting circuit, and has a function of a current limitation related to the switching element. In the lighting circuit, if the output voltage Vout is raised, a current flowing to the switching element is limited to be decreased. Consequently, a voltage applied to the switching element can be suppressed, and furthermore, the winding ratio of the transformer does not need to be increased. Accordingly, it is possible to prevent an electrical efficiency from being deteriorated.

Abstract: A lamp body 20 includes a lamp unit 60 whose irradiation direction is changed according to a running state of a vehicle, a horizontal driving mechanism 90 for horizontally changing the irradiation direction, and a vertical driving mechanism 100 for vertically changing the irradiation direction. The horizontal driving mechanism and the vertical driving mechanism are integrated with each other, so that a lighting apparatus 10 can be mounted in a vehicle by using only a small mounting space. Moreover, the lighting apparatus 10 needs only small numbers of components and mounting man-hours.

Abstract: A vehicular headlamp includes a lamp body having an opening, a first reflector disposed within the lamp body, a lens, and a second reflector. The second reflector serves as an extension reflector to cover a gap between the opening of the lamp body and the first reflector. The lens and the second reflector are joined together at an edge portion thereof by laser welding. The second reflector has a leg portion on a back surface thereof. An edge portion of the opening has a groove to receive the leg portion, and seal material having a predetermined adhesibility, which can be pulled off, is injected into the groove. The second reflector joined to the lens is mounted on an edge of the opening of the lamp body via the seal material.

Abstract: At an upper position of an optical axis Ax between a reflector and projection lens, a pair of left and right first additional reflectors are arranged and a pair of second additional reflectors are arranged on both the left and right sides of the pair of first additional reflectors. Each one of the first additional reflectors reflects light from the light source toward one of the second additional reflectors located on a side opposite to the one of the first additional reflector with respect to the optical axis. Each one of the second additional reflectors reflects, in a forward direction, the light reflected from the first additional reflectors without being transmitted through the projection lens.