Light source unit and vehicle front lamp using the light source unit

Patent metadata

Field	Value
Publication number	US-9845931-B2
Application number	US-201615161366-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	May 31, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A light source unit including: a first light source module; a second light source module; and a light source arrangement portion between the first light source module and the second light source module. The first light source module and the second light source module are staggered in at least one of a front-and-back direction and a left-and-right direction.

First claim

The invention claimed is:

1. A light source unit, comprising:
a first light source module;
a second light source module; and
a light source arrangement portion between the first light source module and the second light source module, wherein
the first light source module and the second light source module are staggered in at least one of a front-and-back direction and a left-and-right direction,
the first light source module and the second light source module are arranged sandwiching the light source arrangement portion from above and below, and
the first light source module and the second light source module are disposed in different positions in the left-and-right direction, wherein the left-and-right direction is a direction perpendicular to both an up-and-down direction and the front-and-back direction.

2. The light source unit according to claim 1 ,
wherein the first light source module is positioned further forward than the second light source module.

3. The light source unit according to claim 1 ,
wherein the first light source module is a low-beam light-emitting diode (LED) module, and the second light source module is a high-beam LED module.

4. The light source unit according to claim 1 , further comprising
a reflector that reflects light from the first light source module and the second light source module; and
a light-blocking component that blocks a portion of the light emitted from at least one of the first light source module and the second light source module and reflected off the reflector, the light-blocking component blocking the portion of the light to form two predetermined types of beam patterns,
wherein the light-blocking component has a surface that reduces light reflection.

5. The light source unit according to claim 4 ,
wherein the surface of the light-blocking component is deglossed.

6. The light source unit according to claim 4 ,
wherein a reflection rate of visible light on the surface of the light-blocking component is at least less than a reflection rate of visible light on the reflector.

7. The light source unit according to claim 4 ,
wherein a surface roughness Ra of the light-blocking component is at least 0.5 μm.

8. The light source unit according to claim 4 , further comprising
a heat sink,
wherein the light source arrangement portion is formed as a portion of the heat sink extending therefrom, and
the light-blocking component is attached to the light source arrangement portion and positioned in front of the first light source module and the second light source module.

9. The light source unit according to claim 4 ,
wherein the light-blocking component forms a cut-off line.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Arita Kosaku

Classifications

• F21S41/19

  Attachment of light sources or lamp holders (achieving variable light distribution by movable light sources F21S41/657) · CPC title

• F21S41/43

  characterised by the shape thereof · CPC title

• F21S41/321

  the reflector being a surface of revolution or a planar surface, e.g. truncated · CPC title

• F21S41/192

  Details of lamp holders, terminals or connectors · CPC title

• F21S41/336

  with discontinuity at the junction between adjacent areas · CPC title