# US 10,502,383 B2 · Vehicle headlamp

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- Number: US 10,502,383 B2
- Document ID: US10502383B2
- Status: Granted
- Kind: B2
- Application number: 16/166,440
- Filed: 2018-10-22
- Published: 2019-05-16
- Granted: 2019-12-10
- Earliest claimed: 2017-10-25
- Assignees: Koito Manufacturing Co., Ltd.
- Applicants: Koito Manufacturing Co., Ltd.
- Inventors: Naoki Uchida; Honami Fujii; Kazuomi Murakami
- Web page: https://patentgrep.com/patent/US10502383B2

## CPC

- F21S 41/30: characterised by reflectors
- F21S 41/16: Laser light sources
- F21S 41/176: Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
- F21S 41/25: Projection lenses
- 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 41/675: by moving reflectors
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS

## Abstract

A vehicle headlamp includes an excitation light source; a light deflector configured to receive light from the excitation light source and two-dimensionally scan the light received from the excitation light source; and a projection lens that transmits the light scanned by the light deflector. The vehicle headlamp includes a first auxiliary lens that is arranged between the light deflector and the projection lens so as to transmit the light scanned by the light deflector toward the projection lens, and the first auxiliary lens has a negative force.

## Claims

### Claim 1

A vehicle headlamp comprising:
an excitation light source;
a light deflector configured to receive light from the excitation light source and two-dimensionally scan the light received from the excitation light source;
a projection lens that transmits the light scanned by the light deflector;
a first auxiliary lens arranged between the light deflector and the projection lens; and
a phosphor arranged between the first auxiliary lens and the projection lens, the phosphor configured to generate and transmit white light directly to the projection lens,
wherein the first auxiliary lens is configured to transmit the light scanned by the light deflector toward the projection lens, and the first auxiliary lens has a negative power.

### Claim 2 (depends on 1)

The vehicle headlamp according to claim 1, further comprising a second auxiliary lens arranged between the light reflector and the first auxiliary lens, the second auxiliary lens configured to exert a positive power as a condensing lens arranged on a light path of the light of the excitation light source.

### Claim 3 (depends on 1)

The vehicle headlamp according to claim 1, wherein the light deflector includes a reflecting surface that is directed to both the excitation light source and the projection lens, the light deflector being fixed to a reflecting mirror that makes a reciprocating swinging rotation.

### Claim 4 (depends on 2)

The vehicle headlamp according to claim 2, wherein the light deflector includes a reflecting surface that is directed to both the excitation light source and the projection lens, the light deflector being fixed to a reflecting mirror that makes a reciprocating swinging rotation.

### Claim 5 (depends on 1)

The vehicle headlamp according to claim 1, further comprising a condensing lens arranged between the light excitation light source and the light reflector, the condensing lens configured to condense the light of the excitation light source toward the light reflector.

### Claim 6 (depends on 2)

The vehicle headlamp according to claim 2, further comprising a condensing lens arranged between the light excitation light source and the light reflector, the condensing lens configured to condense the light of the excitation light source toward the light reflector.

### Claim 7 (depends on 2)

The vehicle headlamp according to claim 2, wherein the light deflector is configured to direct light of the excitation light source directly to the second auxiliary lens.

### Claim 8 (depends on 7)

The vehicle headlamp according to claim 7, wherein the second auxiliary lens is configured to direct light scanned by the light deflector directly to the first auxiliary lens.