Vehicular light-emitting device

Patent metadata

Field	Value
Publication number	US-2020326050-A1
Application number	US-202016863021-A
Country	US
Kind code	A1
Filing date	Apr 30, 2020
Priority date	Jul 29, 2015
Publication date	Oct 15, 2020
Grant date	—

Abstract

The present disclosure enables lighting performance which appears as if there are more light sources than the actual number of light sources, and reduces brightness unevenness. A vehicular light-emitting device includes a plurality of light-emitting units, each of which includes an LED part and a lens configured to diffuse and emit the light received from the LED part, the plurality of light-emitting units being arranged side by side. The plurality of light-emitting units are arranged so that one or more brightness peak values exist between adjacent light-emitting units. Moreover, the light emitted from the lenses of the light-emitting units has a plurality of brightness peaks with respect to the spreading direction of the light, and the arrangement interval of the plurality of light-emitting units is set so that the plurality of brightness peaks of the light emitted from the plurality of light-emitting units are aligned at substantially equal intervals.

First claim

What is claimed is:

1 . A vehicular light-emitting device, comprising:
a plurality of light-emitting units, each of the plurality of light-emitting units comprising a light source and a lens configured to defuse and emit light received from the light source, the plurality of light-emitting units being arranged side by side; a cover which covers the plurality of light-emitting units and has a light-emitting surface through which light emitted from the light source and through the lens is emitted; and a reflection part which reflects the light emitted from the light source and through the lens toward the light-emitting surface; wherein:
the light-emitting surface is arranged apart from an outer surface of the lens at a position avoiding a vertical line extending through a center of the light source and the lens, and
the reflection part has a planar part that is inclined relative to the vertical line and to the light-emitting surface.

2 . The vehicular light-emitting device according to claim 1 , further comprising a holding part which holds the plurality of light-emitting units and has a substantially U-shaped cross section;
wherein:
the cover has a substantially U-shaped cross section,
an inside of the cover having the substantially U-shaped cross section and an inside of the holding part having in the substantially U-shaped cross section are arranged to face each other.

3 . The vehicular light-emitting device according to claim 2 ,
wherein the lens is arranged in the inside of the cover having the substantially U-shaped cross section and the inside of the holding part having the substantially U-shaped cross section.

4 . The vehicular light-emitting device according to claim 2 ,
wherein the cover having the substantially U-shaped cross section and the holding part having the substantially U-shaped cross section overlap each other in a vertical direction parallel to the vertical line extending through the center of the light source and the lens.

5 . The vehicular light-emitting device according to claim 2 ,
wherein the reflection part overlaps with a portion where the cover having the substantially U-shaped cross section and the holding part having the substantially U-shaped cross section overlap in a vertical direction parallel to the vertical line extending through the center of the light source and the lens.

6 . The vehicular light-emitting device according to claim 2 ,
wherein the light source is arranged in the inside of the cover having the substantially U-shaped cross section and outside the holding part having a substantially U-shaped cross section.

7 . The vehicular light-emitting device according to claim 1 ,
wherein the reflection part has a convex part protruding from the planar part toward the light-emitting surface.

8 . The vehicular light-emitting device according to claim 1 ,
wherein the reflection part is finished as a mirror-finished surface.

9 . The vehicular light-emitting device according to claim 1 ,
wherein:
the lens has a light source introduction part that protrudes toward the light source,
the planar part is inclined relative to the light-emitting surface and a light emission direction that extends from the light source and through the light source introduction part.

10 . The vehicular light-emitting device according to claim 1 , further comprising a holding part which holds the plurality of light-emitting units and has a substantially U-shaped cross section;
wherein the reflection part is integrally formed as a part of the substantially U-shaped cross section of the holding part.

Assignees

• Ts Tech Co Ltd

Inventors

• Nomura Masahiro
• Yamato Noriyuki
• Kamano Kenichi

Classifications

• F21S43/26

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255 · CPC title

• F21S43/40

  characterised by the combination of reflectors and refractors · CPC title

• F21S43/19

  Attachment of light sources or lamp holders · CPC title

• F21S43/15

  Strips of light sources · CPC title

• F21V5/00

  Refractors for light sources (characterised by cooling arrangements F21V29/504) · CPC title