Automotive lamp

Patent metadata

Field	Value
Publication number	US-10247381-B2
Application number	US-201514824556-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Feb 18, 2013
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

An automotive lamp includes: a light source; a light emitting member that receives light from the light source and emits light; and a support member that supports the light emitting member. The support member includes a translucent light emitting member accommodating unit. The light emitting member accommodating unit includes a recess in which the light emitting member is accommodated. A light incidence surface and side surfaces of the light emitting member are in contact with the light emitting member accommodating unit in a state in which the light emitting member is accommodated in the recess.

First claim

What is claimed is:

1. An automotive lamp comprising:
a light source;
a light emitting member that receives light from the light source and emits light; and
a support member that supports the light emitting member, wherein the support member includes a translucent light emitting member accommodating unit,
the light emitting member accommodating unit includes a recess in which the light emitting member is accommodated,
a light incidence surface and side surfaces of the light emitting member are in contact with the light emitting member accommodating unit in a state in which the light emitting member is accommodated in the recess, and
on a surface of the light emitting member accommodating unit that is in contact with a side surface of the light emitting member is provided a rough surface area having a surface roughness greater than that of a light incidence surface of the light emitting member accommodating unit, and
the side surface of the light emitting member is a surface connecting the light incidence surface of the light emitting member and a light emission surface which faces away from the light incidence surface and from which light generated inside the light emitting member is emitted, and
the side surface of the light emitting member has a rough surface area having a surface roughness greater than that of the light incidence surface of the light emitting member.

2. The automotive lamp according to claim 1 , wherein the light emitting member accommodating unit includes a plurality of recesses, and the light emitting member is accommodated in each of the plurality of recesses.

3. The automotive lamp according to claim 1 , wherein
the light incidence surface of the light emitting member has a shape collapsed in one direction as viewed in the direction of a normal to the light incidence surface, and
the light source is a laser light source and a beam pattern of laser light radiated from the light source has a shape collapsed on the light incidence surface of the light emitting member in the same direction as the direction in which the light incidence surface of the light emitting member is collapsed.

4. The automotive lamp according to claim 1 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
the light source is a laser light source, and a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

5. The automotive lamp according to claim 1 , further comprising:
a translucent cover member that is in contact with a light emission surface of the light emitting member and with the support member.

6. The automotive lamp according to claim 2 , wherein
the light incidence surface of the light emitting member has a shape collapsed in one direction as viewed in the direction of a normal to the light incidence surface, and
the light source is a laser light source and a beam pattern of laser light radiated from the light source has a shape collapsed on the light incidence surface of the light emitting member in the same direction as the direction in which the light incidence surface of the light emitting member is collapsed.

7. The automotive lamp according to claim 5 , wherein
the light incidence surface of the light emitting member has a shape collapsed in one direction as viewed in the direction of a normal to the light incidence surface, and
the light source is a laser light source and a beam pattern of laser light radiated from the light source has a shape collapsed on the light incidence surface of the light emitting member in the same direction as the direction in which the light incidence surface of the light emitting member is collapsed.

8. The automotive lamp according to claim 2 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
the light source is a laser light source, and
a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

9. The automotive lamp according to claim 3 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

10. The automotive lamp according to claim 5 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
the light source is a laser light source, and
a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

11. The automotive lamp according to claim 6 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
the light source is a laser light source, and
a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

12. The automotive lamp according to claim 2 , further comprising:
a translucent cover member that is in contact with a light emission surface of the light emitting member and with the support member.

13. The automotive lamp according to claim 7 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
the light source is a laser light source, and
a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

14. The automotive lamp according to claim 12 , further comprising:
a light guiding member that is disposed such that one end is toward the light source and the other end is toward the light emitting member, and guides light to the light emitting member, wherein
the light source is a laser light source, and
a beam pattern of laser light emitted from the light guiding member and the light incidence surface of the light emitting member are substantially equal in shape or substantially analogous in shape.

15. The automotive lamp according to claim 4 , further comprising:
a translucent cover member that is in contact with a light emission surface of the light emitting member and with the support member.

16. The automotive lamp according to claim 3 , further comprising:
a translucent cover member that is in contact with a light emission surface of the light emitting member and with the support member.

Assignees

• Koito Mfg Co Ltd

Inventors

• Tsuda Toshiaki
• Ichikawa Tomoyuki

Classifications

• F21S41/176

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

• F21S41/19

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

• F21S41/29 Primary

  Attachment thereof (for achieving variable light distribution F21S41/63) · CPC title

• F21S41/24

  Light guides · CPC title

• F21S41/192

  Details of lamp holders, terminals or connectors · CPC title