Vehicular light-emitting device

Patent metadata

Field	Value
Publication number	US-2018215310-A1
Application number	US-201615747350-A
Country	US
Kind code	A1
Filing date	Jul 28, 2016
Priority date	Jul 29, 2015
Publication date	Aug 2, 2018
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

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; 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.

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 , comprising a holding part configured to hold the plurality of light-emitting units,
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 has locking pawl parts at both ends, and is fixed to the holding part with a snap-fit by the locking pawl parts.

8 . 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.

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

10 . The vehicular light-emitting device according to claim 9 , wherein the lenses have light source introduction parts provided on both sides of the notches and protruded to the light source side.

Assignees

• Ts Tech Co Ltd

Inventors

• Nomura Masahiro
• Yamato Noriyuki
• Kamano Kenichi

Classifications

• F21V5/00

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

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21S43/19

  Attachment of light sources or lamp holders · CPC title

• F21S43/30

  characterised by reflectors · CPC title

• F21S43/40

  characterised by the combination of reflectors and refractors · CPC title