Vehicle headlamp and vehicle using same

Patent metadata

Field	Value
Publication number	US-10563835-B2
Application number	US-201716096285-A
Country	US
Kind code	B2
Filing date	Feb 2, 2017
Priority date	May 26, 2016
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A vehicle headlamp includes a plurality of light emitting elements; a plurality of first lenses; and a plurality of second lenses. The first lens includes a first lens entrance and a first lens exit, and is configured to converge light entered the first lens entrance from the light emitting element on the first lens exit. The second lens includes a second lens entrance facing the first lens exit of the first lens and the second lens exit having a projection shape for forming a focal point. The focal point of the second lens is positioned at a side of the second lens ahead the first lens exit of the first lens.

First claim

The invention claimed is:

1. A vehicle headlamp comprising:
a plurality of light emitting elements;
a plurality of first lenses corresponding to the plurality of light emitting elements, respectively, each including a first lens entrance and a first lens exit, and each configured to converge light entering the first lens entrance from the respective corresponding light emitting onto the first lens exit; and
a plurality of second lenses corresponding the plurality of first lenses, respectively, each including a second lens entrance facing the first lens exit of the respective corresponding first lens, and a second lens exit having a projection shape for forming a focal point,
wherein the focal point of each second lens is positioned inside the second lens, between the second lens entrance and the second lens exit, and between the second lens entrance and the principal point of the second lens.

2. The vehicle headlamp of claim 1 ,
wherein a recess portion is provided in the first lens entrance of each of the plurality of first lenses,
wherein the first lens entrance of each of the plurality of first lenses includes
a first entrance surface which is provided on a bottom surface of the recess portion and has a projection shape toward each of the light emitting elements, and
a second entrance surface which is provided on a side surface of the recess portion, and

wherein each of the plurality of first lenses includes
a first reflection surface which is configured to totally reflect light entering the second entrance surface and guides the light to the first lens exit, and
a second reflection surface which is configured to totally reflect light passing through the first entrance surface and the light reflected by the first reflection surface, and guide the both lights to the first lens exit.

3. The vehicle headlamp of claim 1 ,
wherein when a focal distance of each of the second lenses is f, and an optical distance from a position of the focal point of each of the second lenses to the first lens exit of each of the first lenses is a, 0.05□a/f□0.2 is satisfied.

4. The vehicle headlamp of claim 1 ,
wherein the first lens exit of the each of plurality of first lenses includes a plurality of exit surfaces having different distances from the focal point of the second lens, and
wherein the distances of the plurality of exit surfaces from the focal point are larger toward a lower side in a height direction in a state of being placed in a vehicle.

5. The vehicle headlamp of claim 4 ,
wherein in the plurality of exit surfaces, a dimension in the height direction is larger in a state of being placed in a vehicle and a distance between adjacent exit surfaces is smaller as the distance from the focal point is larger.

6. A vehicle comprising:
the headlamp of claim 1 .

7. A vehicle headlamp comprising:
a plurality of light emitting elements;
a plurality of first lenses each of which is provided corresponding to each of the plurality of light emitting elements, includes a first lens entrance and a first lens exit, and is configured to converge lights entered the first lens entrance from the each of the plurality of light emitting elements on the first lens exit; and
a plurality of second lenses each of which is provided corresponding to each of the plurality of light emitting elements, and includes a second lens entrance facing the first lens exit and a second lens exit having a projection shape for forming a focal point,
wherein the focal point of the second lens is positioned at a side of the second lens ahead the first lens exit of the first lens,
wherein the first lens exit of the each of plurality of first lenses includes a plurality of exit surfaces having different distances from the focal point of the second lens, and
wherein the distances of the plurality of exit surfaces from the focal point are larger toward a lower side in a height direction in a state of being placed in a vehicle.

8. The vehicle headlamp of claim 7 ,
wherein in the plurality of exit surfaces, a dimension in the height direction is larger in a state of being placed in a vehicle and a distance between adjacent exit surfaces is smaller as the distance from the focal point is larger.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kasano Masahiro
• Matsuda Takashi

Classifications

• F21S41/285

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805 · CPC title

• F21S41/32

  Optical layout thereof · CPC title

• B60Q1/04

  the devices being headlights · CPC title

• B60Q1/0011

  with light guides for distributing the light between several lighting or signalling devices · CPC title

• F21S41/141

  Light emitting diodes [LED] · CPC title