Lighting device for vehicle

Patent metadata

Field	Value
Publication number	US-10071677-B2
Application number	US-201715470051-A
Country	US
Kind code	B2
Filing date	Mar 27, 2017
Priority date	Mar 29, 2016
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A lighting device for a vehicle may include a light source; a lens; and a first reflecting unit provided on a partial area of a front surface of the lens. The lighting device may also include a light reducer configured to reduce a size of light emitted from the light source and to emit light having a reduced size toward the first reflecting unit on the lens. The lighting device may further include a reflective fluorescent body disposed on a rear side of the lens and configured to convert a wavelength of light reflected from the first reflecting unit and to reflect light having a converted wavelength into the lens.

First claim

What is claimed is:

1. A lighting device for a vehicle, comprising:
a light source;
a lens;
a first reflecting unit provided on a partial area of a front surface of the lens;
a light reducer configured to reduce a size of light emitted from the light source and to emit light having a reduced size toward the first reflecting unit on the lens;
a reflective fluorescent body disposed on a rear side of the lens and configured to convert a wavelength of light reflected from the first reflecting unit and to reflect light having a converted wavelength into the lens; and
a heat radiating member configured to dissipate heat from the reflective fluorescent body.

2. The lighting device for a vehicle according to claim 1 ,
wherein the front surface of the lens has a convex shape, and
wherein the first reflecting unit is configured with a cross sectional shape that is an arc shape.

3. The lighting device for a vehicle according to claim 1 ,
wherein the first reflecting unit is a concave mirror which is formed in the front surface of the lens.

4. The lighting device for a vehicle according to claim 1 ,
wherein the first reflecting unit is a reflective coating layer which is coated on a portion of the front surface of the lens that does not intersect an optical axis of the lens.

5. The lighting device for a vehicle according to claim 1 ,
wherein the reflective fluorescent body is disposed to face a rear surface of the lens and is configured to reflect, toward the rear surface of the lens, the light having the converted wavelength.

6. The lighting device for a vehicle according to claim 1 ,
wherein the light reducer is disposed at a position between the lens and the light source.

7. The lighting device for a vehicle according to claim 1 ,
wherein the reflective fluorescent body is disposed on an optical axis of the lens, and
wherein the light reducer is disposed apart from the optical axis of the lens.

8. The lighting device for a vehicle according to claim 1 ,
wherein the light reducer is disposed on a rear side of the lens and is configured to emit the light having the converted wavelength in a direction parallel to an optical axis of the lens.

9. The lighting device for a vehicle according to claim 1 , wherein the light reducer comprises:
a first reducer lens configured to reduce a width of light transmitted therethrough that was emitted from the light source; and
a second reducer lens that is spaced apart from the first reducer lens and that is configured to reduce a width of light transmitted therethrough that was emitted from the first reducer lens.

10. The lighting device for a vehicle according to claim 9 ,
wherein an emitting surface of the first reducer lens and an incident surface of the second reducer lens are spaced apart from each other.

11. The lighting device for a vehicle according to claim 9 ,
wherein a diameter of the second reducer lens is smaller than a diameter of the first reducer lens.

12. The lighting device for a vehicle according to claim 9 ,
wherein a thickness of the second reducer lens is smaller than a thickness of the first reducer lens.

13. The lighting device for a vehicle according to claim 9 ,
wherein an incident surface of the first reducer lens on which light is incident has a convex shape.

14. The lighting device for a vehicle according to claim 9 ,
wherein an emitting surface of the second reducer lens from which light is emitted has a concave shape.

15. The lighting device for a vehicle according to claim 9 ,
wherein an optical axis of the first reducer lens is the same as an optical axis of the second reducer lens.

16. The lighting device for a vehicle according to claim 9 ,
wherein an incident surface of the first reducer lens is configured to face the light source, and
wherein an emitting surface of the second reducer lens is configured to face a rear surface of the first lens.

17. The lighting device for a vehicle according to claim 9 ,
wherein the first reducer lens and the second reducer lens are configured such that an optical axis of the first reducer lens intersects with an optical axis of the second reducer lens.

18. The lighting device for a vehicle according to claim 17 , further comprising:
a reflecting member configured to reflect, to the second reducer lens, the light emitted from the first reducer lens.

19. The lighting device for a vehicle according to claim 1 ,
wherein the reflective fluorescent body is disposed on an optical axis of the lens, and
wherein the light reducer is arranged to be spaced apart from the reflective fluorescent body in the optical axis of the lens.

20. The lighting device for a vehicle according to claim 1 , further comprising:
a second reflecting unit provided to be spaced apart from the first reflecting unit on the front surface of the lens and configured to reflect, to a rear side of the lens, light that is reflected from the reflective fluorescent body.

Assignees

• Lg Electronics Inc

Inventors

• Park Jun

Classifications

• G02B2003/0093

  characterised by the shape · CPC title

• F21S41/26

  Elongated lenses · CPC title

• F21S43/16

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

• F21V7/05

  plane · CPC title

• G02B3/0037

  characterized by the distribution or form of lenses · CPC title