Lighting device with a phosphor body spaced apart from a light source

Patent metadata

Field	Value
Publication number	US-9803832-B2
Application number	US-201514814522-A
Country	US
Kind code	B2
Filing date	Jul 31, 2015
Priority date	Aug 1, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

In various embodiments, a lighting device is provided. The lighting device includes at least one light source for emitting primary light, at least one phosphor body which is illuminatable by the primary light and is spaced apart from the at least one light source, and at least one light scattering body which is situated optically downstream of the phosphor body in a light propagation direction of the primary light that is uninfluenced by the phosphor body. The lighting device is designed in the case of an intact phosphor body to generate an illumination pattern by light generated by the phosphor body, and otherwise to generate a light emission pattern by light generated by the at least one light scattering body. The light emission pattern differs from the illumination pattern.

First claim

What is claimed is:

1. A lighting device, comprising:
at least one light source for emitting primary light;
at least one phosphor body which is illuminatable by the primary light and is spaced apart from the at least one light source; and
at least one light scattering body which is situated optically downstream of the phosphor body in a light propagation direction of the primary light that is uninfluenced by the phosphor body;
wherein the lighting device is designed
in the case of an intact phosphor body to generate an illumination pattern by light generated by the phosphor body; and
otherwise to generate a light emission pattern by light generated by the at least one light scattering body;
which light emission pattern differs from the illumination pattern.

2. The lighting device of claim 1 ,
wherein the light emission pattern is a further illumination pattern.

3. The lighting device of claim 1 ,
wherein the light emission pattern has a lower maximum radiation intensity than the illumination pattern.

4. The lighting device of claim 1 ,
wherein at least partly different optical units are disposed downstream of the phosphor body and the light scattering body.

5. The lighting device of claim 1 ,
wherein the light scattering body is a phosphor body.

6. The lighting device of claim 1 ,
wherein the light scattering body is a wavelength-maintaining light scattering body.

7. The lighting device of claim 1 ,
wherein at least one deflection element is situated between the phosphor body and the light scattering body and is designed to deflect the primary light onto the light scattering body in the case of failure.

8. The lighting device of claim 1 ,
wherein the at least one light scattering body is arranged at a channel of a transmitted light optical unit.

9. The lighting device of claim 1 ,
wherein a primary light sensor is situated in the light propagation direction of the primary light through the phosphor body, which primary light sensor is couplable to a control device for the at least one light source, which control device leaves the at least one light source switched on in the event of a failure of the phosphor body being ascertained.

10. The lighting device of claim 1 ,
wherein at least one primary light sensor is situated in the light propagation direction of the primary light through the phosphor body, which at least one primary light sensor is couplable to a control device, which initiates at least one action in the event of a failure of the phosphor body being ascertained.

11. The lighting device of claim 9 ,
wherein the control device is designed to operate the at least one light source in a flashing fashion in the event of a failure of the phosphor body being ascertained.

12. The lighting device of claim 1 ,
wherein the lighting device is a vehicle luminaire or a part thereof and both the illumination pattern and the light emission pattern are at least partly provided for roadway illumination.

13. A vehicle, comprising:
at least one lighting device, comprising:
at least one light source for emitting primary light;
at least one phosphor body which is illuminatable by the primary light and is spaced apart from the at least one light source; and
at least one light scattering body which is situated optically downstream of the phosphor body in a light propagation direction of the primary light that is uninfluenced by the phosphor body;
wherein the lighting device is designed
in the case of an intact phosphor body to generate an illumination pattern by light generated by the phosphor body; and
otherwise to generate a light emission pattern by light generated by the at least one light scattering body;
which light emission pattern differs from the illumination pattern.

Assignees

• Osram Gmbh

Inventors

• Weissenberger Daniel

Classifications

• F21S41/176

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

• F21V13/14

  the elements being filters or photoluminescent elements, reflectors and refractors · CPC title

• F21S41/285

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805 · CPC title

• F21V9/30 Primary

  Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) · CPC title

• F21Y2115/30

  Semiconductor lasers · CPC title