Vehicular headlamp

Patent metadata

Field	Value
Publication number	US-10023102-B2
Application number	US-201615339365-A
Country	US
Kind code	B2
Filing date	Oct 31, 2016
Priority date	Nov 12, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A vehicular headlamp includes: a first light distribution portion including a first light source; a second light distribution portion including a second light source and an micro electro mechanical system mirror; a holding member configured to hold the first light source, the second light source, and the micro electro mechanical system mirror; a single lens including a first lens portion and a second lens portion; and a separating wall formed in the holding member so as to protrude toward the vehicle front side relative to the holding member, the separating wall being configured to separate a region between the first lens portion and the holding member from a region between the second lens portion and the holding member.

First claim

What is claimed is:

1. A vehicular headlamp comprising:
a first light distribution portion including a first light source, the first light distribution portion being configured to distribute, toward a vehicle front side, light projected by the first light source;
a second light distribution portion including a second light source, reflecting mirror, and an micro electro mechanical system mirror, the second light distribution portion being configured to distribute light toward the vehicle front side with a predetermined light distribution pattern by reflecting, by the micro electro mechanical system mirror, light from the reflecting mirror projected by the second light source;
a holding member configured to hold the first light source, the second light source, and the micro electro mechanical system mirror;
a single lens including a first lens portion and a second lens portion, the first lens portion being constituting a vehicle-front-side portion of the first light distribution portion and configured such that the light projected by the first light source is passed through the first lens portion, the second lens portion being constituting a vehicle-front-side portion of the second light distribution portion and configured such that the light reflected by the micro electro mechanical system mirror is passed through the second lens portion;
a separating wall formed in the holding member so as to protrude toward the vehicle front side relative to the holding member, the separating wall being configured to separate a region between the first lens portion and the holding member from a region between the second lens portion and the holding member;
a lens hold portion that holds the lens, a lower portion of the lens hold portion connected to the reflecting mirror.

2. The vehicular headlamp according to claim 1 , wherein:
the lens includes a recessed portion formed on a rear face of the lens such that the recessed portion is opened toward a vehicle rear side; and
a front end of the separating wall is placed inside the recessed portion.

3. The vehicular headlamp according to claim 1 , wherein:
a surface of the separating wall on a side of the second light distribution portion is a light absorption portion configured to absorb the light reflected by the micro electro mechanical system minor.

4. The vehicular headlamp according to claim 1 , wherein
the holding member is provided as a heat sink configured to dissipate heat generated by the first light source and the second light source.

5. The vehicular headlamp according to claim 1 , wherein:
the first light distribution portion and the second light distribution portion are arranged in a vehicle up-down direction; and
the second light distribution portion is placed on a vehicle lower side relative to the first light distribution portion.

6. The vehicular headlamp according to claim 1 , wherein:
the micro electro mechanical system mirror is constituted by a plurality of micromovable mirrors arranged two-dimensionally; and
each of the micromovable mirrors is configured to be changeable between an ON state in which each of the micromovable mirrors projects reflection light toward the vehicle front side and an OFF state in which each of the micromovable mirrors projects the reflection light toward the separating wall.

7. The vehicular headlamp according to claim I, wherein:
the second light distribution portion includes a reflection portion provided on the vehicle front side relative to the second light source and configured to reflect the light projected by the second light source so that the reflected light is incident on the micro electro mechanical system minor.

8. The vehicular headlamp according to claim 2 , wherein:
a rear face of the first lens portion is configured to protrude toward a rear side relative to a bottom face of the recessed portion so as to collect the light projected by the first light source; and
a rear face of the second lens portion is configured to protrude toward the rear side relative to the bottom face of the recessed portion so as to collect the light reflected by the micro electro mechanical system mirror.

9. A vehicular headlamp comprising:
a first light distribution portion including a first light source, the first light distribution portion being configured to distribute, toward a vehicle front side, light projected by the first light source;
a second light distribution portion including a second light source and an micro electro mechanical system mirror, the second light distribution portion being configured to distribute light toward the vehicle front side with a predetermined light distribution pattern by reflecting, by the micro electro mechanical system mirror, light projected by the second light source;
a holding member configured to hold the first light source, the second light source, and the micro electro mechanical system mirror;
a single lens including a first lens portion and a second lens portion, the first lens portion being constituting a vehicle-front-side portion of the first, light distribution portion and configured such that the light projected by the first light source is passed through the first lens portion, the second lens portion being constituting a vehicle-front-side portion of the second light distribution portion and configured such that the light reflected by the micro electro mechanical system mirror is passed through the second lens portion;
a separating wall formed in the holding member so as to protrude toward the vehicle front side relative to the holding member, the separating wall being configured to separate a region between the first lens portion and the holding member from a region between the second lens portion and the holding member;
the lens includes a recessed portion formed on a rear face of the lens such that the recessed portion is opened toward a vehicle rear side;
a front end of the separating wall is placed inside the recessed portion;
a rear face of the first lens portion is configured to protrude toward a rear side relative to a bottom face of the recessed portion so as to collect the light projected by the first light source; and
a rear face of the second lens portion is configured to protrude toward the rear side relative to the bottom face of the recessed portion so as to collect the light reflected by the micro electro mechanical system mirror.

Assignees

• Toyota Motor Co Ltd
• Koito Mfg Co Ltd

Inventors

• Mouri Fumihiko
• Nakada Yusuke
• Nakanishi Yoshiyuki

Classifications

• F21S41/172

  High-intensity discharge light sources · CPC title

• F21S41/147

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

• F21S41/47

  Attachment thereof (achieving variable light distribution by movable screens F21S41/683) · CPC title

• F21S41/39

  Attachment thereof (achieving variable light distribution by movable reflectors F21S41/675) · CPC title

• F21S41/265

  Composite lenses; Lenses with a patch-like shape · CPC title