Vehicle lamp, a method of adjusting a vehicle lamp, and a vehicle with a vehicle lamp
AssigneeKoninklijke Philips N.V.
InventorsMarco Van As, Ralph Hubert Peters
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Abstract
The invention provides a lamp with adjustable beam cut-off, useful for e.g. vehicle headlamps. The lamp comprises a solid-state light source 1 and a reflector 2, as well as a movable beam limiter 3. To adjust the cut-off, the beam limiter 3 may be moved by an actuator 4. An advantage is that the beam limiter 3 reflects incident light into the emitted beam instead of absorbing it, which increases efficiency. Furthermore, because the reflector 2 and also the beam limiter 3 may be positioned very close to the light source, which may be a LED or a laser diode, they may be flat and very small. Both circumstances ensure that the beam cut-off may be adjusted very quickly.
Claims18
A vehicle lamp, comprising:
- a solid-state light source;
- a circumferential collimating reflector, operably positioned with respect to the light source to form a light beam emanating from the light source;
- an adjustable beam limiter within the circumferential collimating reflector, operable to limit a solid angle of the light beam in at least one direction;
- an actuator to adjust the beam limiter;
- and
- a projection lens, positioned in a path of the light beam;
- wherein the adjustable beam limiter comprises a movable reflector, that is movable with respect to the circumferential collimating reflector and is positioned to reflect light from the light source into the light beam towards the projection lens.
A vehicle lamp, comprising:
- a solid-state light source;
- a collimating reflector, operably positioned with respect to the light source to form a light beam emanating from the light source;
- an adjustable beam limiter, operable to limit a solid angle of the light beam in at least one direction;
- an actuator to adjust the beam limiter under control of an actuator control;
- and
- a projection lens, positioned in a path of the light beam;
- wherein the adjustable beam limiter comprises a movable reflector that is movable with respect to the collimating reflector and is positioned to reflect light from the light source into the light beam towards the projection lens, and
- wherein the actuator control is operably connected to a sensor configured to detect tilt and vertical acceleration, and adjusts the adjustable beam limiter, based on at least one of the detected tilt and vertical acceleration, to correct misalignment.
A vehicle lamp, comprising:
- a solid-state light source;
- a collimating reflector, operably positioned with respect to the light source to form a light beam emanating from the light source;
- an adjustable beam limiter, operable to limit a solid angle of the light beam in a vertical direction;
- an actuator configured to adjust the beam limiter;
- a projection lens, positioned in a path of the light beam;
- and
- a horizontal beam adjuster configured to adjust the solid angle of the light beam in a horizontal direction,
- wherein the adjustable beam limiter comprises a movable reflector that is movable with respect to the collimating reflector and is positioned to reflect light from the light source into the light beam towards the projection lens.
Dependencies are inferred from the claim text.