Headlamps for vehicles

Patent metadata

Field	Value
Publication number	US-10539284-B2
Application number	US-201716098219-A
Country	US
Kind code	B2
Filing date	Apr 28, 2017
Priority date	May 4, 2016
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

A headlamp for vehicles with a laser module comprising a laser light source for the radiation of a laser light beam, and an optic unit to shape the laser light beam to form a given light distribution. The optic unit has a primary optic device for the imaging of an intermediate image on an intermediate image plane. The optic unit has a deflection device which is arranged in an intermediate image plane and which has a limiting edge by means of which a share of the light of the laser light beam is deflected along a light path in the direction of a bundling device, by means of which the share of light is deflected into a light distribution while forming a cut-off line.

First claim

The invention claimed is:

1. A headlamp for vehicles with a laser module, the laser module comprising:
a laser light source for the radiation of a laser light beam; and
an optic unit to shape the laser light beam to form a given light distribution,
wherein the optic unit has a primary optic device for the imaging of an inter-mediate image on an intermediate image plane, and
wherein the optic unit has a first deflection device with a limiting edge arranged in the intermediate image plane, by means of which a first share of light of the laser light beam is deflected along a first light path in a direction of a first bundling device, by means of which the first share of light is deflected to form a first partial light distribution while forming a cut-off line, and
the optic unit has a second deflection device, by means of which a second share of light of the laser light beam not deflected by the first deflection device is deflected along a second light path in a direction of a second bundling device by means of which the second share of light is deflected to a second partial light distribution so that the second partial light distribution overlaps the first partial light distribution so that they form a light distribution, and wherein
the second share of light is deflected at an acute angle (φ) relative to the first share of light with regard to a projection plane running vertically relative to a main radiation direction (H).

2. The headlamp laser module according to claim 1 , wherein the first deflection device and the second deflection device are arranged in an offset manner in the main radiation direction (H).

3. The headlamp laser module according to claim 1 , wherein the second deflection device and/or the second bundling device is/are embodied in a manner that the second share of the light is reflected at least once with regard to the limiting edge of the first share of the light, so that an increase in light intensities in the first partial light distribution runs in the same direction as that of the second partial light distribution.

4. The headlamp laser module according to claim 1 wherein the limiting edge runs at least one of vertically and horizontally to form a respective vertical and/or horizontal cut-off line of the light distribution.

5. The headlamp laser module according to claim 1 wherein a left-hand headlamp in the direction of travel of the vehicle has a first deflection device with a first limiting edge to form a left vertical cut-off line of the light distribution and a headlamp on the right in the direction of travel of the vehicle has a first deflection device with a second limiting edge to form a right vertical cut-off line of the light distribution.

6. The headlamp laser module according to claim 1 wherein the first deflection device and the second deflection device are pivoted around at least one of a vertical axis (DV) and a horizontal axis.

7. The headlamp laser module according to claim 1 wherein the primary optic device has at least one of a lens, a freeform ellipsoid, and a freeform paraboloid.

8. The headlamp laser module according to claim 1 wherein the first deflection device is embodied as a shutter-deflection-mirror and the second deflection device as a concave mirror.

9. The headlamp laser module according to claim 1 wherein at least one of the first bundling device and the second bundling device is/are embodied as at least one of a partial reflector and a mirror.

10. The headlamp laser module according to claim 1 wherein the laser light source has a laser light radiating laser material as well as a conversion element, wherein the laser light radiated from the laser material in a first spectral range is at least partially converted into laser light of a second spectral range by means of the conversion element, so that by superimposing the first and the second spectral range, the laser light beam is generated as white light.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Kauschke Rainer
• Passgang Frank
• Cramer Herbert
• Weise Hendrik

Classifications

• F21S41/176

  Light sources where the light is generated by photoluminescent material spaced from a primary light generating element · CPC title

• F21S41/25

  Projection lenses · CPC title

• F21S41/675

  by moving reflectors · CPC title

• F21S41/255

  Lenses with a front view of circular or truncated circular outline · CPC title

• F21S41/43

  characterised by the shape thereof · CPC title