Vehicle lighting fixture

Patent metadata

Field	Value
Publication number	US-2016341384-A1
Application number	US-201615145384-A
Country	US
Kind code	A1
Filing date	May 3, 2016
Priority date	May 18, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

A vehicle lighting fixture can be configured to two-dimensionally scan with laser light by an optical deflector to form a luminance distribution on a screen member and project the luminance distribution via a projector lens forward to form a predetermined light distribution pattern corresponding to the luminance distribution. The vehicle lighting fixture can prevent the laser light from being directly projected forward even if an optical deflector breaks down and the laser light is deflected in a particular direction by the faulty optical deflector. The vehicle lighting fixture can be configured to include: a light-shielding member configured to shield the laser light deflected in the particular direction by the faulty optical deflector. The light-shielding member is provided between the screen member and the projector lens in an optical path through which the laser light deflected in the particular direction by the faulty optical deflector passes.

First claim

What is claimed is:

1 . A vehicle lighting fixture comprising:
a laser light source; an optical deflector configured to two-dimensionally scan with laser light that is emitted from the laser light source and incident on the optical deflector, the optical deflector being configured to deflect the laser light in a particular direction when the optical deflector breaks down; a screen member in which the laser light scanned by the optical deflector forms a luminance distribution; at least one projector lens configured to project the luminance distribution formed in the screen member forward; and a light-shielding member configured to shield the laser light deflected in the particular direction by the faulty deflector, the light-shielding member being provided between the screen member and the projector lens in an optical path through which the laser light deflected in the particular direction by the faulty optical deflector passes.

2 . The vehicle lighting fixture according to claim 1 , wherein the projector lens has an incident face closest to the screen member and the light-shielding member is provided to the incident face of the projector lens.

3 . The vehicle lighting fixture according to claim 1 , wherein the light-shielding member is a laser light-absorbing member.

4 . The vehicle lighting fixture according to claim 2 , wherein the light-shielding niember is a laser light-absorbing member.

5 . The vehicle lighting fixture according to claim 1 , wherein the light-shielding member is a laser light-reflecting member, and
a laser light-absorbing member configured to absorb laser light reflected from the laser light-reflecting member is further provided.

6 . The vehicle lighting fixture according to claim 2 , wherein the light-shielding member is a laser light-reflecting member, and
a laser light-absorbing member configured to absorb laser light reflected from the laser light-reflecting member is further provided.

7 . The vehicle lighting fixture according to claim 1 , further comprising:
a failure detecting unit configured to detect a failure of the optical deflector; and a controlling unit configured to stop supplying power to the laser light source when the failure detecting unit detects the failure of the optical deflector.

8 . The vehicle lighting fixture according to claim 2 , further comprising:
a failure detecting unit configured to detect a failure of the optical deflector; and a controlling unit configured to stop supplying power to the laser light source when the failure detecting unit detects the failure of the optical deflector.

9 . The vehicle lighting fixture according to claim 3 , further comprising:
a failure detecting unit configured to detect a failure of the optical deflector; and a controlling unit configured to stop supplying power to the laser light source when the failure detecting unit detects the failure of the optical deflector.

10 . The vehicle lighting fixture according to claim 4 , further comprising:
a failure detecting unit configured to detect a failure of the optical deflector; and a controlling unit configured to stop supplying power to the laser light source when the failure detecting unit detects the failure of the optical deflector.

11 . The vehicle lighting fixture according to claim 5 , further comprising:
a failure detecting unit configured to detect a failure of the optical deflector; and a controlling unit configured to stop supplying power to the laser light source when the failure detecting unit detects the failure of the optical deflector.

12 . The vehicle lighting fixture according to claim 6 , further comprising:
a failure detecting unit configured to detect a failure of the optical deflector; and a controlling unit configured to stop supplying power to the laser light source when the failure detecting unit detects the failure of the optical deflector.

Assignees

• Stanley Electric Co Ltd

Inventors

• Hoshino Shinya

Classifications

• F21S41/16

  Laser light sources · CPC title

• F21S45/48

  with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device · CPC title

• F21Y2115/30

  Semiconductor lasers · CPC title

• F21S41/675

  by moving reflectors · CPC title

• F21S41/25

  Projection lenses · CPC title