Headlight device

Patent metadata

Field	Value
Publication number	US-9890918-B2
Application number	US-201314654539-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Dec 21, 2012
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A headlight device is disclosed. In an embodiment a headlight device includes a laser light source configured to emit collimated primary radiation, a conversion element comprising conversion regions configured to at least partly convert the collimated primary radiation into secondary radiation and to form luminous regions during operation, and separating webs which separate the conversion regions from one another, wherein the separating webs are nontransmissive to the collimated primary radiation and secondary radiation and a deflection unit configured to direct the collimated primary radiation onto the conversion element and to guide the collimated primary radiation as a scanning beam over partial regions of the conversion element.

First claim

The invention claimed is:

1. A headlight device comprising:
a laser light source configured to emit collimated primary radiation;
a conversion element comprising conversion regions configured to at least partly convert the collimated primary radiation into secondary radiation and to form luminous regions during operation, and separating webs which separate the conversion regions from one another, wherein the separating webs are nontransmissive to the collimated primary radiation and secondary radiation; and
a deflection unit configured to direct the collimated primary radiation onto the conversion element and to guide the collimated primary radiation as a scanning beam over partial regions of the conversion element.

2. The headlight device according to claim 1 , wherein a partial region consists of a single conversion region.

3. The headlight device according to claim 1 , wherein the conversion element comprises
a main body comprising depressions which interrupt a main surface of the main body and the separating webs which separate the depressions from one another; and
a conversion material arranged in the depressions, wherein the conversion regions are formed by the depressions and the conversion material and wherein the conversion regions are separated from one another by the separating webs of the main body.

4. The headlight device according to claim 3 , wherein at least one sidewall of the depressions is embodied as a reflective sidewall.

5. The headlight device according to claim 4 , wherein the reflective sidewall is formed by a reflection layer arranged on the main body.

6. The headlight device according to claim 4 , wherein the at least one sidewall runs obliquely with respect to the main surface of the main body, and wherein the depressions taper from the main surface.

7. The headlight device according to claim 3 , wherein the main body comprises a semiconductor material or a metal.

8. The headlight device according to claim 7 , wherein the main body comprises Si, Ge, GaAs or Al.

9. The headlight device according claim 3 , wherein the conversion material does not project beyond the main surface of the main body.

10. The headlight device according to claim 9 , wherein the conversion material terminates flush with the main surface of the main body or has a concave surface.

11. The headlight device according to claim 1 , further comprising an optical element, wherein the conversion element is arranged at a focal point of the optical element.

12. The headlight device according to claim 11 , wherein the optical element is a reflector element which is arranged between the laser light source and the conversion element and has a diaphragm, through which the collimated primary radiation passes during operation.

13. The headlight device according to claim 12 , wherein the deflection unit is arranged between the laser light source and the diaphragm and directs the collimated primary radiation coming from the laser light source to the diaphragm during operation.

14. The headlight device according to claim 1 , wherein the deflection unit has at least one micromirror.

15. The headlight device according to claim 1 , wherein the headlight device is configured to emit pixel light, and wherein each pixel is formed by a luminous region.

16. A headlight device comprising:
a laser light source configured to emit collimated primary radiation;
a conversion element comprising a main body, conversion regions configured to at least partly convert the collimated primary radiation into secondary radiation and to form luminous regions during operation, and separating webs which separate the conversion regions from one another and are nontransmissive to the collimated primary radiation and the secondary radiation; and
a deflection unit configured to direct the collimated primary radiation onto the conversion element and to guide the collimated primary radiation as a scanning beam over partial regions of the conversion element, and
wherein the main body consists of a semiconductor material or a metal.

17. The headlight device according to claim 16 , wherein the headlight device is configured to emit pixel light, and wherein each pixel is formed by a luminous region.

18. A headlight device comprising:
a laser light source configured to emit collimated primary radiation;
a conversion element comprising a main body and a conversion material, wherein the main body comprises depressions interrupting a main surface of the main body and separating webs which separate the depressions from one another, wherein the conversion material is arranged in the depressions, and conversion regions are formed by the depressions provided with the conversion material, wherein the conversion regions are configured to at least partly convert the collimated primary radiation into secondary radiation and to form luminous regions during operation, and wherein the separating webs which separate the conversion regions from one another are nontransmissive to the collimated primary radiation and secondary radiation and comprise a roughening of the main body at the main surface; and
a deflection unit configured to direct the collimated primary radiation onto the conversion element and to guide the collimated primary radiation as a scanning beam over partial regions of the conversion element.

19. The headlight device according to claim 18 , wherein the headlight device is configured to emit pixel light, and wherein each pixel is formed by a luminous region.

Assignees

• Osram Gmbh

Inventors

• Singer Frank
• Groetsch Stefan

Classifications

• F21S41/176

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

• F21S41/43

  characterised by the shape thereof · CPC title

• F21Y2115/30

  Semiconductor lasers · CPC title

• F21S45/70

  Prevention of harmful light leakage · CPC title

• F21S41/50

  characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers · CPC title