Headlight for vehicle and vehicle using the same

Patent metadata

Field	Value
Publication number	US-2018356060-A1
Application number	US-201815950854-A
Country	US
Kind code	A1
Filing date	Apr 11, 2018
Priority date	Jun 9, 2017
Publication date	Dec 13, 2018
Grant date	—

Abstract

A headlight for a vehicle having good heat dissipation performance includes a plurality of lens units, each including a plurality of light emitting devices, and lenses arranged so as to face the respective plural light emitting devices. The plurality of light emitting devices include first light emitting devices arranged on an inner side of the vehicle and having a first light emitting area and second light emitting devices arranged on an outer side of the vehicle having a second light emitting area. A first light distribution emitted from first lens units having the first light emitting devices and a second light distribution emitted from second lens units having the second light emitting devices are included, and the second light emitting area is smaller than the first light emitting area as well as a range of the second light distribution is smaller than a range of the first light distribution.

First claim

What is claimed is:

1 . A headlight for a vehicle comprising:
a plurality of lens units, wherein the plurality of lens units include:
a plurality of light emitting devices; and
lenses arranged to face the plurality of light emitting devices, respectively, wherein the plurality of light emitting devices include:
first light emitting devices arranged on an inner side of the vehicle and having a first light emitting area; and
second light emitting devices arranged on an outer side of the vehicle and having a second light emitting area,
wherein a plurality of first lens units having the first light emitting devices emit a first light distribution,
wherein a plurality of second lens units having the second light emitting devices emit a second light distribution,
wherein the second light emitting area is smaller than the first light emitting area, and
wherein a range of the second light distribution is smaller than a range of the first light distribution.

2 . The headlight for the vehicle according to claim 1 ,
wherein the first and second light emitting devices are mounted on a single metal substrate, wherein the first light emitting devices include a first distance of a step difference between adjacent light emitting devices wherein the second light emitting devices include a second distance of a step difference between adjacent light emitting devices, and wherein the second distance is larger than the first difference.

3 . The headlight for the vehicle according to claim 2 , wherein the number of the plurality of first lens units is smaller than the number of the plurality of second lens units.

4 . A headlight for a vehicle comprising:
a plurality of lens units, wherein the plurality of lens units include:
a plurality of light emitting devices arranged from an inner side of the vehicle to an outer side of the vehicle with step differences, and
lenses arranged to face the plurality of light emitting devices, respectively,
wherein the light emitting devices on the inner side of the vehicle in the plurality of light emitting devices and the lenses and the light emitting devices on the outer side of the vehicle in the plurality of light emitting devices and the lenses emit light distributions,
a light emitting area of light emitting devices on the inner side of the vehicle and a light emitting area of light emitting devices on the outer side of the vehicle are the same or approximately the same, and
a range of light distributions emitted through the light emitting devices and lenses on the inner side of the vehicle and a range of light distributions emitted through the light emitting devices on the outer side of the vehicle in the plurality of light emitting devices and lenses are the same or approximately the same.

5 . The headlight for the vehicle according to claim 4 ,
wherein the plurality of light emitting devices from the inner side of the vehicle to the outer side of the vehicle are mounted on a single substrate, and a third distance of a step difference between the plurality of light emitting devices on the inner side of the vehicle and a fourth distance of a step difference between light emitting devices on the outer side of the vehicle are the same or approximately the same.

6 . The headlight for the vehicle according to claim 2 ,
wherein the lenses include a plurality of first lenses arranged to face the respective plurality of light emitting devices and each having an incident port and an emission port, and a plurality of second lenses arranged so as to face respective emission ports of the plurality of first lenses and each having an incident surface and an emission surface.

7 . The headlight for the vehicle according to claim 6 , wherein the plurality of first lenses each include
the incident port on which light from the light emitting device is incident, a first incident surface having a lens shape for condensing light from the light emitting device on a surface facing the light emitting device, a second incident surface guiding light not passing through the first incident surface to a side surface direction of the first lens, a first reflective surface totally reflecting light passing through the second incident surface and guiding the light to the emission port, and a second reflective surface totally reflecting light deviated from a direction of the emission port after passing through the first incident surface and light deviated from the direction of the emission port after being reflected on the first reflective surface to guide the light to the emission port.

8 . A vehicle on which the headlight for the vehicle according to claim 3 is mounted.

9 . A headlight for a vehicle according to claim 1 , wherein the light emitting devices include an LED package.

10 . A headlight for a vehicle according to claim 1 , wherein the light emitting devices include a light emitting portion which absorbs blue light and emits yellow light.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kasano Masahiro
• Matsuda Takashi

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21S41/275

  Lens surfaces, e.g. coatings or surface structures · CPC title

• F21S41/65

  by acting on light sources · CPC title

• B60Q1/0483

  mounted on a bracket, e.g. details concerning the mouting of the lamps on the vehicle body · CPC title

• F21S41/147 Primary

  the main emission direction of the LED being angled to the optical axis of the illuminating device · CPC title