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Lighting device for a motor vehicle

  • US 9,188,726 B2
  • Filed: 04/18/2014
  • Issued: 11/17/2015
  • Est. Priority Date: 10/28/2011
  • Status: Active Grant
First Claim
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1. A lighting device for a motor vehicle, comprising:

  • a laser light source;

    an optical waveguide for total reflective guidance of light along a light propagation direction, the optical waveguide having a coupling-in surface on a face thereof, a coupling-out surface arranged along the light propagation direction and an exit surface arranged along the light propagation direction, whereinlight of the laser light source is coupled-in to the optical waveguide via the coupling-in surface;

    a collimator arranged to convert the light of the laser light source at the coupling-in surface of the optical waveguide to a collimated ray beam, wherein the collimator comprises a curved face of the optical waveguide, on which the light of the laser light source is diffracted or reflected; and

    the coupling-out surface couples out the light at the exit surface where a total-reflection condition does not exist.

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