# US 7,407,310 B2 · Vehicular headlamp

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- Number: US 7,407,310 B2
- Document ID: US7407310B2
- Status: Granted
- Kind: B2
- Application number: 11/636,835
- Filed: 2006-12-11
- Published: 2007-07-12
- Granted: 2008-08-05
- Earliest claimed: 2005-12-28
- Assignees: Koito Manufacturing Co., Ltd.
- Inventors: Motohiro Komatsu
- Web page: https://patentgrep.com/patent/US7407310B2

## CPC

- F21S 41/43: characterised by the shape thereof
- F21S 41/172: High-intensity discharge light sources
- F21S 41/255: Lenses with a front view of circular or truncated circular outline
- F21S 41/265: Composite lenses; Lenses with a patch-like shape
- F21S 41/321: {the reflector being a surface of revolution or a planar surface, e.g. truncated}
- F21S 41/333: {with discontinuity at the junction between adjacent areas}
- F21S 41/365: successively reflecting the light
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS

## Abstract

A vehicular headlamp 1 including a projection lens 16 installed on the optical axis Ax extending in the longitudinal direction of the vehicle a light source 12a provided behind the rear side focal point F of the projection lens 16, and a reflector 14 that reflects direct light from the light source 12a forward and toward the optical axis Ax; and in this headlamp, an additional lens 30, which deflects and directs light from the light source 12a to the front is provided around the outer perimeter of the projection lens 16, and grooves 33, which have side faces that direct at least a part of the incident light toward the side of the vehicle, are formed in the outer surface of the additional lens 30.

## Claims

### Claim 1

A vehicle headlamp comprising;
a lamp chamber formed by a lamp body and a front cover,
a projection lens installed on an optical axis extending in a longitudinal direction of a vehicle,
a light source provided on a rear side of a rear side focal point of the projection lens,
a reflector for reflecting direct light from the light source forward and toward the optical axis;
an additional lens provided on at least a part of a circumference of the projection lens so as to deflect and direct light from the light source forward; and
a plurality of deflecting portions formed on the additional lens so as to direct at least a part of incident light toward a side of the vehicle, said plurality of deflecting portions extends along a radial axis on said additional lens.

### Claim 2 (depends on 1)

The vehicular headlamp according to claim 1, wherein:
each of the plurality of deflecting portions is comprised of a side face of a radially extending grove formed in an outer surface of the additional lens.

### Claim 3 (depends on 1)

The vehicular headlamp according to claim 1, wherein
the deflecting portion is comprised of a side face of a convex portion formed on an outer surface of the additional lens.

### Claim 4 (depends on 1)

The vehicular headlamp according to claim 1, wherein
the deflecting portion is comprised of a side face of a raised portion formed on an outer surface of the additional lens.

### Claim 5 (depends on 1)

The vehicular headlamp according to claim 1, wherein
a part of the deflecting portion is comprised of a totally reflective face for directing a part of the incident light upward.

### Claim 6 (depends on 1)

The vehicular headlamp according to claim 1 wherein said additional lens has a wedge shape cross-section.