A vehicular lighting apparatus which is relatively small, low cost, superior in mountability to an automobile, and superior in recognizeability of an object illuminated by a head lamp. The apparatus includes: a composite lens element that is a light guide element constructed by molding a translucent resin substantially into a plate-like shape; a planar light-emitting unit that emits light; an optical system that transforms planar light from the light-emitting unit into linear light and that causes the linear transformed light to be incident on a rear side face of the light guide element; and a diffraction lens formed on the rear side face of the light guide element on which the linear transformed light is incident, and condensing the linear transformed light. The light condensed by the lens means is emitted from a front side face of the light guide element onto a road surface in front of the vehicle.

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.

Provided is an illumination device which has a coherent light source that emits a first coherent light beam and a second coherent light beam, an optical device that diffuses the first coherent light beam to illuminate a first illumination zone and diffuses a wave of the second coherent light beam to illuminate a second illumination zone, and a timing control unit that individually controls incidence timing of the first coherent light beam and the second coherent light beam on the optical device or illumination timing of the first illumination zone and the second illumination zone, wherein the optical device includes a first diffusion region on which the first coherent light beam is incident, and a second diffusion region on which the second coherent light beam is incident, the first diffusion region is capable of illuminating the first illumination zone by diffusion of the incident first coherent light beam.

Provided is an illumination device which has a coherent light source that emits a first coherent light beam and a second coherent light beam, an optical device that diffuses the first coherent light beam to illuminate a first illumination zone and diffuses a wave of the second coherent light beam to illuminate a second illumination zone, and a timing control unit that individually controls incidence timing of the first coherent light beam and the second coherent light beam on the optical device or illumination timing of the first illumination zone and the second illumination zone, wherein the optical device includes a first diffusion region on which the first coherent light beam is incident, and a second diffusion region on which the second coherent light beam is incident, the first diffusion region is capable of illuminating the first illumination zone by diffusion of the incident first coherent light beam.

An actuator includes: an output unit 30 having an output shaft 33; and a first worm 40 and a second worm 50 extending along a face perpendicular to the output shaft 33, wherein: the output unit 30 includes a rotating mechanism 34a configured to be meshed with the first worm 40 to rotate the output shaft 33 about a predetermined rotation axis 33a, and a moving mechanism 39 configured to be meshed with the second worm 50 to move the output shaft 33 in a direction orthogonal to the rotation axis 33a; the first worm 40 and the second worm 50 are placed to sandwich the output shaft 33; and a distance between the second worm 50 and the output shaft 33 is shorter than a distance between the first worm 40 and the output shaft 33.

A vehicle lighting device includes a socket, a substrate, at least one light emitting element, a frame part, a sealing part, and a lens. The substrate is provided on one end side of the socket. The light emitting element is provided on the substrate. The frame part surrounds the light emitting element. The sealing part is provided on an inner side of the frame part and covers the light emitting element. The lens is provided on the sealing part and includes an optical part into which a light emitted from the light emitting element enters. The optical part includes a first portion from which the light entered is emitted. The first portion protrudes to a side opposite to a sealing part side. A contour of the first portion is a substantially rectangular shape as viewed from a direction along a central axis of the optical part.

Systems and methods for automatic adaptive headlight control in a vehicle are disclosed. The systems and methods can detect one or more conditions, such as presence of a nearby object and/or poor visibility. The headlight can account for the one or more conditions by dynamically and automatically adjusting the total intensity of light output from the headlight, creating one or more different patterns of intensity of light, emitting different colors of light, or a combination thereof. In some examples, the headlight can include a plurality of independently controlled light emitters or a liquid crystal element. In some examples, one or more currents and/or duty cycle values can be adjusted. In some examples, the headlight can be divided into a plurality of sections, such that each section can emit different wavelengths (e.g., colors) of light.

Systems and methods for automatic adaptive headlight control in a vehicle are disclosed. The systems and methods can detect one or more conditions, such as presence of a nearby object and/or poor visibility. The headlight can account for the one or more conditions by dynamically and automatically adjusting the total intensity of light output from the headlight, creating one or more different patterns of intensity of light, emitting different colors of light, or a combination thereof. In some examples, the headlight can include a plurality of independently controlled light emitters or a liquid crystal element. In some examples, one or more currents and/or duty cycle values can be adjusted. In some examples, the headlight can be divided into a plurality of sections, such that each section can emit different wavelengths (e.g., colors) of light.

A vehicular lighting apparatus is relatively small, low cost, superior in mountability, and offers a superior design. The vehicular lighting apparatus attachable to a front end of a vehicle includes: a composite lens element that is a light guide element constructed by molding a translucent resin substantially into a plate-like shape; a planar light-emitting unit that emits illumination light; an optical system that transforms planar light from the light-emitting unit into linear light and that causes the linear transformed light to be incident on a rear side face of the light guide element; and a diffraction lens formed on the rear side face of the light guide element on which the linear transformed light is incident, and condensing the linear transformed light. The light condensed by the lens means is emitted from a front side face of the light guide element onto a road surface in front of the vehicle.

A wavelength conversion element includes a substrate, a wavelength converting member disposed on at least part of a surface of substrate and having a shape of a plate or film, and a light receiver integrated in the substrate and including a p-n junction composed of a p-type semiconductor and an n-type semiconductor.