Vehicular light-emitting device

Patent metadata

Field	Value
Publication number	US-10654405-B2
Application number	US-201615747350-A
Country	US
Kind code	B2
Filing date	Jul 28, 2016
Priority date	Jul 29, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

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

The invention 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; and
a holding part configured to hold the plurality of light-emitting units;
wherein:
the plurality of light-emitting units are arranged so that one or more brightness peak values exist between adjacent light-emitting units of the plurality of light-emitting units,
each lens has locking pawl parts at both ends; is fixed to the holding part with a snap-fit by the locking pawl parts, and has light source introduction parts that protrude from a light source side of the lens toward the light source,
a protrusion amount of each of the light source introduction parts is smaller than a protrusion amount of each of the locking pawl parts, and
the light source introduction parts are provided at a back of a lens fixing region of the holding part.

2. The vehicular light-emitting device according to claim 1 , wherein
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
an 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.

3. The vehicular light-emitting device according to claim 1 ,
wherein the holding part has a reflection part which reflects the light emitted from the lenses toward a light-emitting surface.

4. The vehicular light-emitting device according to claim 3 , wherein the reflection part is formed with a convex part at a position facing the light source.

5. The vehicular light-emitting device according to claim 3 , wherein the holding part is formed with a concave part between the regions which hold the plurality of light-emitting units.

6. The vehicular light-emitting device according to claim 3 , further comprising a cover which engages with the holding part and covers the plurality of light-emitting units,
wherein the cover has such a shape that at an end portion of the cover on an emission side of the light in the lens of a light-emitting unit, the lens and the cover are closest to each other.

7. The vehicular light-emitting device according to claim 3 , wherein each lens is formed with a rib configured to regulate rotation with respect to the holding part.

8. The vehicular light-emitting device according to claim 1 , wherein each lens is formed with a notch in a position facing the light source.

9. The vehicular light-emitting device according to claim 8 , wherein the light source introduction parts are provided on both sides of the notches.

10. The vehicular light-emitting device according to claim 1 , wherein each of the locking pawl parts has a lock portion that protrudes toward an outside of the lens from the locking pawl part.

11. The vehicular light-emitting device according to claim 1 , wherein the light source introduction parts protrude from the light source side of the lens, through an insertion hole of the holding part, and toward the light source.

Assignees

• Ts Tech Co Ltd

Inventors

• Nomura Masahiro
• Yamato Noriyuki
• Kamano Kenichi

Classifications

• F21S43/31

  Optical layout thereof · CPC title

• F21S43/14 Primary

  Light emitting diodes [LED] · CPC title

• F21S43/20

  characterised by refractors, transparent cover plates, light guides or filters · CPC title

• F21S43/19

  Attachment of light sources or lamp holders · CPC title

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title