In a light source device, an axis extends from a light-emitting face and perpendicularly to the light-emitting face. A reflective surface includes a curved surface defined by rotating a first arc which is a part of an ellipse around the axis. The ellipse has a first focal point and a second focal point which are located on the light-emitting face. The second focal point is located adjacently to the first arc with respect to a center of the ellipse. A distance from the first focal point to the axis is shorter than a distance from the second focal point to the axis.

In a light source device, an axis extends from a light-emitting face and perpendicularly to the light-emitting face. A reflective surface includes a curved surface defined by rotating a first arc which is a part of an ellipse around the axis. The ellipse has a first focal point and a second focal point which are located on the light-emitting face. The second focal point is located adjacently to the first arc with respect to a center of the ellipse. A distance from the first focal point to the axis is shorter than a distance from the second focal point to the axis.

A photoconversion device includes a wavelength converter including a plurality of phosphor areas, a drive, and a controller. The plurality of phosphor areas includes a first phosphor area to emit fluorescence with a first wavelength spectrum in response to excitation light and a second phosphor area to emit fluorescence with a second wavelength spectrum different from the first wavelength spectrum in response to the excitation light. The drive changes an illuminating area to receive the excitation light in the plurality of phosphor areas. The controller drives the drive to change the illuminating area in the plurality of phosphor areas and stop driving the drive to define the illuminating area in the plurality of phosphor areas.

A luminous motor-vehicle module including in a first light source, and a first reflective surface that is configured to collect and reflect the light rays emitted by the first light source into a first light beam, a second light source and a second reflective surface that is configured to collect and reflect the light rays emitted by said second light source into a second light beam, and an optical system configured to project the first and second light beams; the first and second light sources emitting the light rays in the same direction, the first and second reflective surfaces are offset along the optical axis and the optical system is configured to form an image of the second reflective surface.

A luminous motor-vehicle module including in a first light source, and a first reflective surface that is configured to collect and reflect the light rays emitted by the first light source into a first light beam, a second light source and a second reflective surface that is configured to collect and reflect the light rays emitted by said second light source into a second light beam, and an optical system configured to project the first and second light beams; the first and second light sources emitting the light rays in the same direction, the first and second reflective surfaces are offset along the optical axis and the optical system is configured to form an image of the second reflective surface.

A vehicle headlamp includes: a first light source unit that forms at least a high-beam light distribution pattern; a second light source unit that forms an additional light distribution pattern and irradiates light with a luminous intensity higher than that of the first light source unit; a posture switching mechanism that switches between a first posture in which an optical axis of the second light source unit is parallel to an optical axis of the first light source unit and a second posture in which the optical axis of the second light source unit is deviated in the horizontal direction by a predetermined angle from the optical axis of the first light source unit; and a controller that controls an ON/OFF state of the second light source unit and an operation state of the posture switching mechanism according to a vehicle speed acquired from a vehicle.

Reflector assemblies and lighting devices incorporating such reflector assemblies are disclosed and described. The reflector assembly includes a reflector body defining an interior reflective surface that in some embodiments has a shape akin to a compound elliptic paraboloid. One or more LEDs can be maintained relative to the reflector body such that an entirety of a light cone emitted by the LED reflects from the interior reflective surface out to the world as a collimated beam. Lighting devices enable light rays to travel with a greater solid angle from LEDs than traditional in-plane optics. Light from a directional point source with a mounting position that is embedded in reflector body oriented to face an opposing curved mirror wall surface so light rays that are diverging prior to reflecting off the interior reflective surfaced are merged together after the reflective bounce to travel in parallel as a collimated beam.

Reflector assemblies and lighting devices incorporating such reflector assemblies are disclosed and described. The reflector assembly includes a reflector body defining an interior reflective surface that in some embodiments has a shape akin to a compound elliptic paraboloid. One or more LEDs can be maintained relative to the reflector body such that an entirety of a light cone emitted by the LED reflects from the interior reflective surface out to the world as a collimated beam. Lighting devices enable light rays to travel with a greater solid angle from LEDs than traditional in-plane optics. Light from a directional point source with a mounting position that is embedded in reflector body oriented to face an opposing curved mirror wall surface so light rays that are diverging prior to reflecting off the interior reflective surfaced are merged together after the reflective bounce to travel in parallel as a collimated beam.

A photoconversion device includes a holder, a wavelength converter, and an optical element. The holder holds an output portion that outputs excitation light. The wavelength converter includes an incident surface section including a protruding surface to receive the excitation light from the output portion and emits fluorescence in response to the excitation light incident on the incident surface section. The optical element includes a focal point surrounded by the incident surface to direct the fluorescence emitted by the wavelength converter in a predetermined direction.

A light emitting diode lamp is composed of a reflective mirror, a pillar and a plurality of light emitters disposed in radial arrangement about a focal point of the reflective mirror on the surface of the pillar. Each of the plurality of light emitters is composed of a light emitting diode and a lens forming a virtual image in a position of the focal point located behind the light emitting diode. Additionally, a plurality of light emitting diode elements composing the light emitting diode in each of the plurality of light emitters emit light rays with the same wavelength, and the light emitting diodes in the plurality of light emitters emit the light rays with at least two types of wavelength.