A lamp device for vehicle 1 comprises a light source 2, an inner lens 3 configured to accept light of the light source 2, and a housing 5 configured to cover a periphery of the light source unit 2 and the inner lens 3. When a traveling direction of a light beam with a largest light amount in the light emitted from the light source 2 is defined as front, the housing 5 includes a back surface portion 51 located on a rear side of the inner lens 3, and a lower surface portion 53 located on a lower side of the inner lens 3, the lower surface portion 53 includes an extended portion 53a extended to a front side of a front surface portion 31a of the inner lens 3.

An ADB lamp unit of a vehicle headlamp includes a light source constituted by a plurality of semiconductor light-emitting elements that can be turned on/off individually, and a reflector having a reflective surface that is based on a paraboloid of revolution. The reflector is constituted by a perpendicularly split plurality of partial reflectors, with the reflective surface of each partial reflector being configured such that the horizontal spread of reflected light reflected by each partial reflectors is approximately equal in a predetermined projection plane.

An ADB lamp unit of a vehicle headlamp includes a light source constituted by a plurality of semiconductor light-emitting elements that can be turned on/off individually, and a reflector having a reflective surface that is based on a paraboloid of revolution. The reflector is constituted by a perpendicularly split plurality of partial reflectors, with the reflective surface of each partial reflector being configured such that the horizontal spread of reflected light reflected by each partial reflectors is approximately equal in a predetermined projection plane.

A first light source illuminates a first region. A second light source is configured to provide lower luminance than that of the first light source. The second light source illuminates a second region that overlaps the first region, and that has a larger area than that of the first region. A lighting circuit drives the first light source and the second light source according to a common lighting instruction. The lighting circuit gradually turns on the first light source and the second light source with different gradual changing time periods in response to the lighting instruction.

A first light source illuminates a first region. A second light source is configured to provide lower luminance than that of the first light source. The second light source illuminates a second region that overlaps the first region, and that has a larger area than that of the first region. A lighting circuit drives the first light source and the second light source according to a common lighting instruction. The lighting circuit gradually turns on the first light source and the second light source with different gradual changing time periods in response to the lighting instruction.

In a light source for headlight, the light emitting element is arranged to be displaced from an optical axis of the projection lens part. The reflection surface part is in a shape of a concave mirror having an optical axis and one focal point on the optical axis. An optical center which is an intersection of the reflection surface part and the optical axis of the reflection surface part is arranged on the optical axis of the projection lens part and between the projection lens part and a focal point of the projection lens part. The optical axis of the reflection surface part is oriented in a direction passing a position between a central part of a light emitting surface of the light emitting element and a central part of the projection lens part.

In a light source for headlight, the light emitting element is arranged to be displaced from an optical axis of the projection lens part. The reflection surface part is in a shape of a concave mirror having an optical axis and one focal point on the optical axis. An optical center which is an intersection of the reflection surface part and the optical axis of the reflection surface part is arranged on the optical axis of the projection lens part and between the projection lens part and a focal point of the projection lens part. The optical axis of the reflection surface part is oriented in a direction passing a position between a central part of a light emitting surface of the light emitting element and a central part of the projection lens part.

An illumination device has a coherent light source, an optical device that diffuses the plurality of coherent light beams and illuminates a predetermined illumination area, and a timing control unit that individually controls incident timing of the plurality of coherent light beams to the optical device or illumination timing of the illumination area, wherein the optical device has a plurality of diffusion regions, the diffusion regions being provided corresponding to the plurality of coherent light beams, the plurality of diffusion regions illuminate the illumination range by diffusion of incident coherent light beams, the plurality of diffusion regions have a plurality of element diffusion regions, the plurality of element diffusion regions illuminate partial regions in the illumination area by diffusion of incident coherent light beams, and at least parts of the partial regions illuminated by the plurality of element diffusion regions are different from one another.

An illumination device has a coherent light source, an optical device that diffuses the plurality of coherent light beams and illuminates a predetermined illumination area, and a timing control unit that individually controls incident timing of the plurality of coherent light beams to the optical device or illumination timing of the illumination area, wherein the optical device has a plurality of diffusion regions, the diffusion regions being provided corresponding to the plurality of coherent light beams, the plurality of diffusion regions illuminate the illumination range by diffusion of incident coherent light beams, the plurality of diffusion regions have a plurality of element diffusion regions, the plurality of element diffusion regions illuminate partial regions in the illumination area by diffusion of incident coherent light beams, and at least parts of the partial regions illuminated by the plurality of element diffusion regions are different from one another.

In various embodiments, a lighting device for a motor vehicle is provided. The lighting device includes at least one light source, and at least one layer of a lacquer embodied such that light may be coupled into the lacquer for achieving a luminous effect. Scattering particles are provided in the lacquer for output coupling of the light.