Abstract: The light distribution of a vehicle headlamp can be changed between various modes, including a basic mode and a motorway mode. In the basic mode, shaded region changeover means block a high light intensity region, and deflection control means controls a lamp optical axis Lx to a straight travel direction. In the motorway mode, the shaded region changeover means does not block the high light intensity region, and the deflection control means controls deflection of the lamp optical axis to a host vehicle lane side. A light distribution in which the high light intensity region faces a far distance ahead of the host vehicle lane can be obtained, and the host vehicle lane is brightly illuminated without dazzling a driver of a preceding vehicle or an oncoming vehicle. Accordingly, illumination suited to the motorway mode during high speed and medium speed travel can be achieved.

Abstract: A vehicle headlamp includes a light source bulb for emitting light, a base member fixed with a light source bulb, a reflector for reflecting light emitted from the light source bulb, a projecting lens for projecting light reflected by the reflector to a front side along an optical axis Ax, and a shade for blocking a portion of light directed from the reflector to the projecting lens. The vehicle headlamp displaces the reflector from a first position to a second position which is upward and rearward from the base member. The vehicle headlamp can facilitate obtaining a light distribution suitable for driving on a motorway or in wet conditions.

Abstract: A vehicular headlamp includes a first reflector disposed fixed with respect to the light source; a second reflector rotatable in a direction that opens and closes a reflective surface of the first reflector; a bracket rotatably supporting the second reflector via a shaft that extends in a direction generally perpendicular to the optical axis of the light source; an actuator attached to the bracket; an attachment includes an insertion hole into which the driving rod of the actuator is inserted and first and second connection holes into which the connecting shaft of the second reflector is inserted. The second reflector includes a connecting shaft that projects in a direction generally perpendicular to an optical axis of the light source. The actuator includes a body and a driving rod that projects from a portion other than a center portion of the body and moves in an axial direction. The first connection hole and the second connection hole of the attachment open one way and open in opposite directions.

Abstract: The light distribution of a vehicle headlamp can be changed between various modes, including a basic mode and a motorway mode. In the basic mode, shaded region changeover means block a high light intensity region, and deflection control means controls a lamp optical axis Lx to a straight travel direction. In the motorway mode, the shaded region changeover means does not block the high light intensity region, and the deflection control means controls deflection of the lamp optical axis to a host vehicle lane side. A light distribution in which the high light intensity region faces a far distance ahead of the host vehicle lane can be obtained, and the host vehicle lane is brightly illuminated without dazzling a driver of a preceding vehicle or an oncoming vehicle. Accordingly, illumination suited to the motorway mode during high speed and medium speed travel can be achieved.

Abstract: A vehicular headlamp includes a first reflector disposed fixed with respect to the light source; a second reflector rotatable in a direction that opens and closes a reflective surface of the first reflector; a bracket rotatably supporting the second reflector via a shaft that extends in a direction generally perpendicular to the optical axis of the light source; an actuator attached to the bracket; an attachment includes an insertion hole into which the driving rod of the actuator is inserted and first and second connection holes into which the connecting shaft of the second reflector is inserted. The second reflector includes a connecting shaft that projects in a direction generally perpendicular to an optical axis of the light source. The actuator includes a body and a driving rod that projects from a portion other than a center portion of the body and moves in an axial direction. The first connection hole and the second connection hole of the attachment open one way and open in opposite directions.

Abstract: A vehicle headlamp is provided with: a projector lens; a light source bulb; a reflector for reflecting direct light from the light source bulb to the front side; a movable shade; and an actuator for moving the movable shade between a shading position and a shading relieving position. The movable shade is pivotally arranged so that it can be rotated round a rotary axis extending in a vehicle width direction, in a neighborhood of a lens center axis. A rod member has one end portion connected to the movable shade and the other end portion connected to the actuator. The actuator gives a drive force to the rod member in a longitudinal direction of the rod member.

Abstract: A headlight has a plurality of lighting device units and a unit support member that supports the plurality of lighting device units. Each lighting device unit has a projection lens, a light emitting diode arranged behind a rear side focus of the projection lens, and a rectilinear propagation blocking member that is arranged in a vicinity of the rear side focus, and blocks a rectilinear propagation of a portion of light emitted from the light emitting diode so as to form a cutoff line. The projection lens and the rectilinear propagation blocking member are integrally formed as a light control member in each light device unit.

Abstract: A vehicle headlamp includes a light source bulb for emitting light, a base member fixed with a light source bulb, a reflector for reflecting light emitted from the light source bulb, a projecting lens for projecting light reflected by the reflector to a front side along an optical axis Ax, and a shade for blocking a portion of light directed from the reflector to the projecting lens. The vehicle headlamp displaces the reflector from a first position to a second position which is upward and rearward from the base member. The vehicle headlamp can facilitate obtaining a light distribution suitable for driving on a motorway or in wet conditions.

Abstract: A movable shade is moved by a shade driving device between a first shade position which is positioned on an optical axis at a rear focal point of a projection lens and a second shade position which is located further downward than the first shade position. Even in the event that there is provided only a single light source, low beam light distribution patterns and high beam light distribution patterns can selectively be formed. In addition, the light source is moved by a light source driving device between a first light source position which is positioned on the optical axis and a second light source position which is positioned further forward than the first light source position. Then, four types of light distribution patterns can be formed through combinations of the positions of the light source and the positions of the movable shade.

Abstract: Optical axes are simultaneously adjusted by tiltably mounting a plurality of lighting device units on a common unit support member. A rectilinear propagation blocking member of each lighting device unit is fixed with screw via the elastic bush to the unit support member, so that the optical axis can be adjusted. Due to the above structure, even when the accuracy of shapes of the rectilinear propagation blocking member and the unit support member are not sufficiently ensured and also even when the accuracy of the attaching work can not be sufficiently ensured, the optical axes of the lighting device units can be arranged in order by adjusting the optical axis of the rectilinear propagation blocking member.

Abstract: A vehicle headlamp is provided with: a projector lens; a light source bulb; a reflector for reflecting direct light from the light source bulb to the front side; a movable shade; and an actuator for moving the movable shade between a shading position and a shading relieving position. The movable shade is pivotally arranged so that it can be rotated round a rotary axis extending in a vehicle width direction, in a neighborhood of a lens center axis. A rod member has one end portion connected to the movable shade and the other end portion connected to the actuator. The actuator gives a drive force to the rod member in a longitudinal direction of the rod member.

Abstract: Optical axes are simultaneously adjusted when a plurality of lighting device units 30, the light sources of which are light emitting elements 34, are tiltably supported by the common unit support member 20. In this case, the positioning recess portion 20d is provided which is composed so that the light source fixing portion 20B1 formed in a plurality of portions of the unit support member 20 can be contacted with the back face 42a and the outer circumferential face 42b of the support plate 42 for supporting the light emitting element 34. Due to the foregoing, the light emitting element 34 can be highly accurately attached to the unit support member 20, and the optical axes Ax, of the lighting device units 30 can be put in order.

Abstract: A movable shade is moved by a shade driving device between a first shade position which is positioned on an optical axis at a rear focal point of a projection lens and a second shade position which is located further downward than the first shade position. Even in the event that there is provided only a single light source, low beam light distribution patterns and high beam light distribution patterns can selectively be formed. In addition, the light source is moved by a light source driving device between a first light source position which is positioned on the optical axis and a second light source position which is positioned further forward than the first light source position. Then, four types of light distribution patterns can be formed through combinations of the positions of the light source and the positions of the movable shade.

Abstract: Optical axes are simultaneously adjusted by tiltably mounting a plurality of lighting device units on a common unit support member. A rectilinear propagation blocking member of each lighting device unit is fixed with screw via the elastic bush to the unit support member, so that the optical axis can be adjusted. Due to the above structure, even when the accuracy of shapes of the rectilinear propagation blocking member and the unit support member are not sufficiently ensured and also even when the accuracy of the attaching work can not be sufficiently ensured, the optical axes of the lighting device units can be arranged in order by adjusting the optical axis of the rectilinear propagation blocking member.

Abstract: Optical axes are simultaneously adjusted when a plurality of lighting device units 30, the light sources of which are light emitting elements 34, are tiltably supported by the common unit support member 20. In this case, the positioning recess portion 20d is provided which is composed so that the light source fixing portion 20B1 formed in a plurality of portions of the unit support member 20 can be contacted with the back face 42a and the outer circumferential face 42b of the support plate 42 for supporting the light emitting element 34. Due to the foregoing, the light emitting element 34 can be highly accurately attached to the unit support member 20, and the optical axes Ax, of the lighting device units 30 can be put in order.

Abstract: A plurality of lighting device units 30, the light sources of which are light emitting elements 34, are tiltably supported by a common unit support member 20, so that optical axes of the plurality of lighting device units 30 are simultaneously adjusted. The projection lens 32 and the rectilinear propagation blocking member 38, which compose each lighting device unit 30, are integrated with each other as a light control member 40, and this light control member 40 and the light emitting element 34 are individually attached to the unit support member 20. Due to the foregoing, the lighting device structure can be made simple compared with the structure in which the completed lighting device unit is attached to the unit support member 20.

Abstract: A beam switching device 24 is provided for switching between a low beam and a high beam by rotating a shade 22 for screening part of incident light given off from a discharge illuminant portion 18a to a reflecting surface 20a of a reflector 20. The shade 22 rotates about a rotational axis A extending in a direction which inclines a predetermined angle &THgr; relative to a horizontal plane. A rotational locus of the shade 22 can be inclined relative to a vertical plane. The beam switching device 24 can also be inclined relative to the vertical plane. Thus, a vertical dimension h from an optical axis Ax to a lower end f the beam switching device 24 is made short.

Abstract: A shade driving unit is provided below a discharge bulb, and a fixed shade for covering a movable shade is provided close to the front side of the movable shade to conceal substantially the shade moving mechanism of the shade driving unit. Moreover, the shade leg portion of the fixed shade is fitted to a fixed shade-leg fitting projection formed below a reflector from its rear side to conceal substantially the mounting structure. Further, a pair of lateral upright walls extending from the fixed shade-leg fitting projection is formed below the reflector. The shade moving mechanism can thus be substantially concealed from either side of the fixed shade, even from a laterally shifted viewpoint from the front of the lamp.

Abstract: A vehicle headlamp is equipped with a shade driving unit 24 for moving a movable shade 22, which is capable of shading part of light incident on a reflector 20 from the discharge light emitting portion 18a of a discharge bulb 18, between at least two positions where the incident light is shed in different degrees. The discharge bulb 18 is fixedly supported by the reflector 30 via a bulb supporting base 26 and the movable shade 22 and the shade driving unit 24 are fitted to the bulb supporting base 26. Thus, the light source bulb 18, the movable shade 22 and the shade driving unit 24 together with the bulb supporting base 26 can be operated integrally as a unit. The unit is prefabricated before being fitted to the reflector 20 to facilitate the assembling of the lamp. Moreover, the precision of placement of the movable shade 22 with respect to the discharge light emitting portion 18a can also be improved.

Abstract: A shade driving unit is provided below a discharge bulb, and a fixed shade for covering a movable shade is provided close to the front side of the movable shade to conceal substantially the shade moving mechanism of the shade driving unit. Moreover, the shade leg portion of the fixed shade is fitted to a fixed shade-leg fitting projection formed below a reflector from its rear side to conceal substantially the mounting structure. Further, a pair of lateral upright walls extending from the fixed shade-leg fitting projection is formed below the reflector. The shade moving mechanism can thus be substantially concealed from either side of the fixed shade, even from a laterally shifted viewpoint from the front of the lamp.