Vehicle lamp with segmented ellipsoidal reflector, condenser lens, and plurality of light sources mounted on different planes of heat dissipating base
View Patent ↗A vehicle lamp includes a condenser lens with a focal plane and an optical axis, a heat-dissipation base disposed at a side of the condenser lens such that the focal plane is disposed between the condenser lens and the heat-dissipation base, a first light source disposed on the heat-dissipation base with a first light-emitting surface facing the focal plane, a reflector disposed on the heat-dissipation base and having a plurality of ellipsoidal surfaces with at least one of the two focal points of each of the ellipsoidal surfaces located on the focal plane, and a second light source disposed on the heat-dissipation base with a substrate and second light-emitting surfaces disposed on the substrate facing the reflector.
1. A vehicle lamp, comprising:
a condenser lens having a focal plane and an optical axis;
a heat-dissipation base disposed at a side of the condenser lens, wherein the focal plane is disposed between the condenser lens and the heat-dissipation base;
a first light source disposed on the heat-dissipation base, wherein the first light source comprises a first light-emitting surface facing toward the focal plane;
a second light source disposed on the heat-dissipation base, wherein the second light source comprises a substrate and a plurality of second light-emitting surfaces, and the second light-emitting surfaces are disposed adjacent to each other on the substrate in a side-by-side arrangement, wherein the second light-emitting surfaces are defined as M light-emitting groups, and each of the light-emitting groups has N light-emitting zones, wherein M and N are greater than 1; and
a reflector disposed on the heat-dissipation base, wherein the second light source faces toward the reflector, and the reflector comprises M reflective surfaces corresponding to the M light-emitting groups, and each of the reflective surfaces is a partial curved surface of an ellipsoid, and the reflective surfaces respectively have first focal points and second focal points, and the second focal points are located at the same position of the focal plane.
2. The vehicle lamp of claim 1 , wherein one of edges of the first light source coincides with the optical axis.
3. The vehicle lamp of claim 1 , wherein the heat-dissipation base comprises a first plane and a second plane which are connected to each other, and the second plane is tilted to the first plane, wherein the first light source is disposed on the first plane, and the second light source is disposed on the second plane.
4. The vehicle lamp of claim 1 , wherein the M first focal points are respectively located within the M corresponding light-emitting groups.
5. The vehicle lamp of claim 1 , wherein the first light-emitting surface and the second light-emitting surfaces comprise a light-emitting diode (LED) or an organic LED (OLED).
6. The vehicle lamp of claim 1 , wherein the reflector has a symmetry axis, and the reflective surfaces are symmetric about the symmetry axis, and the light-emitting groups disposed on the substrate are symmetric about the symmetry axis.
7. The vehicle lamp of claim 1 , further comprising a connecting element connecting the heat-dissipation base and the reflector, wherein the connecting element is configured to shift the second focal points of the reflective surfaces.
8. The vehicle lamp of claim 1 , wherein the ellipsoid corresponding to each of the reflective surfaces has a major axis, and the major axis is a straight line connecting the first focal point and the second focal point in each of the ellipsoids, and the major axes of the ellipsoids intersect to each other at a point of the focal plane.
9. The vehicle lamp of claim 8 , wherein an extending direction of each of the major axes of the ellipsoids is tilted to a plane on which the second light source is disposed with an angle, and the angle is in a range from 0 degree to 45 degrees.