A lighting circuit turns on multiple semiconductor light sources. Multiple current sources are each coupled in series with a corresponding one from among the semiconductor light sources. A switching converter supplies a driving voltage V.sub.OUT across each of multiple series connection circuits formed of the multiple semiconductor light sources and the multiple current sources. A converter controller controls a switching transistor of the switching converter based on a relation between a voltage across one from among the multiple current sources and a reference voltage having a positive correlation with the temperature T.sub.j.

A vehicle lamp includes a first lamp unit for forming a first region of a beam pattern, and a second lamp unit for forming a second region of the beam pattern. The first lamp unit and the second lamp unit are arranged in a left-right direction. Each of the first lamp unit and the second lamp unit includes a plurality of lamp modules arranged in the left-right direction, each of the plurality of lamp modules including a light source unit including a light source and a light path adjusting unit. A position of light irradiation region formed by the light emitted from each of the plurality of lamp modules is particularly configured depending on a position of the light source with respect to a rear focal point of the light path adjusting unit.

A lamp for a vehicle includes a first lamp module including a first light source part, and a first lens structure that forms a first light distribution pattern with light irradiated from the first light source part, and a second lamp module including a second light source part, and a second lens structure that forms a second light distribution pattern having characteristics that are different from those of the first light distribution pattern with light irradiated from the second light source part. The first light distribution pattern and the second light distribution pattern overlap each other to form a low beam pattern. Shapes of input surfaces of the first lens structure and the second lens structure, to which the light is input, are different.

An illumination device for a motorcycle headlamp, which device is configured to create a segmented light pattern and includes: (i) a plurality of light sources, at least some of which are configured to be activated independently from each other, (ii) a segmented light guide unit, including a plurality of light guide elements and a light homogenization body, and (iii) a projection lens, which is configured to receive the light emitted from the collective light exit surface of the light homogenization body and to project the segmented light pattern, wherein at least some of the light guide elements are part of a first group of light guide elements, said first group having a defined geometric shape of the light entry surface, which is limited by four corners connected by four side edges (left, right, lower, and upper) wherein three of the side edges are straight, and the fourth edge has a rounded protrusion, which increases the light entrance surface, and is either the left or the right edge of the respective light guide element.

A low beam optical module includes a lens, a light-shielding sheet and at least one light concentrating portion. The light-shielding sheet includes a light-shielding sheet body. An upper edge of a front end of the light-shielding sheet body comprises a low beam cutoff line structure. A front end surface and the rear end surface of the light-shielding sheet body are transparent. The light concentrating portion is connected to a rear end of the light-shielding sheet. The lens is arranged in front of the light-shielding sheet, and an outer contour surface of the at least one light concentrating portion is engaged with a lower surface of the light-shielding sheet body—the light-shielding sheet body can receive emitted light of the light concentrating portion and refract the light from the front end surface to the lens. The projected light forms a low beam region III beam shape. A low beam illumination module, a vehicle lamp and a vehicle includes the low beam optical module.

The invention relates to a lighting device (1) for a motor vehicle headlight for generating a light pattern with a light-shadow line, wherein the lighting device comprises a light source (10), a light-permeable body (100), a light injection element (101) for injecting light which the at least one light source (10) emits, and a projection device (500). The light-permeable body (100) has an aperture device (103) with an aperture edge region (104). A light beam (S2) spreading in the optical element (110) is displayed by the projection device (500) as a light pattern (LV) with a light-shadow line (HD), with the light-shadow line (HD) being determined by the aperture edge region (104) of the aperture device (103). At least one light guide element (200, 300) is arranged on the optical element (110), which light guide element has a light guide element light incoupling face (201, 301) and a light guide element light outcoupling face (202, 302), the at least one light guide element (200, 300) being arranged on the optical element (110) in such a manner that light (S3) is injected from the light injection element (101) via the light guide element light incoupling face (201, 301) into the at least one light guide element (200, 300), spreads within this, and enters the optical element (110) again via the light guide element light outcoupling face (202, 302), the light guide element light outcoupling face (202, 302) of the at least one light guide element (200, 300) issuing into the optical element (110) in such a manner that the at least one light guide element light outcoupling face (200, 300) lies beneath the aperture edge region (104) as considered in the vertical direction (Z), so that the light rays (S5) re-entering the optical element (110) from the projection optical assembly (200) are projected as a sign-light light beam (SL) into a region (B) of the light pattern located above the light-shadow line, and are displayed in the light pattern as a sign-light light pattern (SV), for instance.

A vehicle lighting device includes a high-light source group, a low-light source group, a high-beam lens to transmit light from the high-beam light source and emit the light to outside, a low-beam lens to transmit light from the low-beam light source and emit the light to outside, a circuit board having the high-beam light source and the low-beam light source mounted thereon together, and a reflector that guides light emitted from the low-beam light source to the low-beam lens, where the circuit board is inclined in a front-rear direction and an up-down direction.

A vehicle lens apparatus includes a top lens connected to a main lens. The main lens projects onto a horizontal surface a first light pattern with a width in a rear-to-front direction to include a first main light region, and two first lateral light regions respectively formed at left and right sides of the first main light region. The top lens projects a second light pattern convexed in a rear-to-front direction, and includes a second main light region superimposed on the first main light region, and two second lateral light regions respectively and rearwardly extending from left and right sides of the second main light region to protrude rearwardly from the first lateral light regions.

A headlight device including a headlight configured to emit light frontward of a leaning vehicle to form a lower light beam, an upper central light beam, an upper left light beam and an upper right light beam, and a control device that controls light emission from the headlight without any user operation. The control device forms both the upper left and the upper right light beams while the leaning vehicle is traveling straight, and reduces a brightness of the upper left and upper right light beams, responsive to a vehicle being illuminated by the upper left and upper right light beams respectively, and forms the upper left and upper right light beams respectively while the leaning vehicle is turning left and right, and maintains the brightness of the formed upper left or upper right light beam regardless of whether any vehicle is illuminated by the upper left or upper right light beam.

An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.