Lighting device for a motor vehicle
First Claim
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.
1 Assignment
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Accused Products
Abstract
A lighting device for a motor vehicle, includes a light guide for total-reflective guiding of light along a direction of light propagation. The light originates from at least one light source and can be coupled-in via at least one coupling surface on one end face of the light guide. The light guide further includes a coupling-out surface disposed along the direction of light propagation for coupling out light that exits from the light guide where the total-reflection condition no longer exists at the exit surface disposed along the direction of the light propagation. The lighting device is characterized in that the at least one light source, the light from which can be coupled in on the at least one coupling-in surface, is a laser light source.
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Citations
24 Claims
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1. A lighting device for a motor vehicle, comprising:
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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, wherein light 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A lighting device for a motor vehicle, comprising:
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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, wherein light of the laser light source is coupled-in to the optical waveguide via the coupling-in surface, and the coupling-out surface couples out the light at the exit surface where a total-reflection condition does not exist, wherein the laser light source is a monochromatic light source, the lighting device further comprising; a phosphor conversion layer configured to convert the monochromatic light from the monochromatic light source to white light or light of a wavelength differing from that of the monochromatic light source, wherein the phosphor conversion layer is configured to be one of; arranged in front of the face of the optical waveguide, mounted in a recess of the optical waveguide, formed on the coupling-out surface of the optical waveguide, forming the coupling-out surface of the optical waveguide, and mounted downstream of the coupling-out surface of the optical waveguide.
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23. A lighting device for a motor vehicle, comprising:
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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, wherein light of the laser light source is coupled-in to the optical waveguide via the coupling-in surface, and the coupling-out surface couples out the light at the exit surface where a total-reflection condition does not exist, wherein the exit surface of the optical waveguide is curved to generate collimated light exiting from the exit surface.
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24. A lighting device for a motor vehicle, comprising:
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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, wherein light of the laser light source is coupled-in to the optical waveguide via the coupling-in surface, the coupling-out surface couples out the light at the exit surface where a total-reflection condition does not exist; and a deflecting arrangement configured to generate collimated light from the light exiting from the exit surface of the optical waveguide.
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Specification