# US 10,766,399 B2 · Headlight system for a vehicle

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- Number: US 10,766,399 B2
- Document ID: US10766399B2
- Status: Granted
- Kind: B2
- Application number: 16/606,651
- Filed: 2018-04-18
- Published: 2020-02-13
- Granted: 2020-09-08
- Earliest claimed: 2017-04-19
- Assignees: Lumileds LLC
- Applicants: Lumileds LLC
- Inventors: Kang Lu; Ping Wu; Meng Han; Huayun Feng; Yiwen Lu
- Web page: https://patentgrep.com/patent/US10766399B2

## CPC

- B60Q 1/0058: {Stacked, i.e. one lamp located behind the other in the optical axis direction}
- F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S 41/148: the main emission direction of the LED being perpendicular to the optical axis
- F21S 41/24: Light guides
- F21S 41/255: Lenses with a front view of circular or truncated circular outline
- F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805}
- F21S 41/32: Optical layout thereof
- F21S 41/365: successively reflecting the light
- F21S 41/43: characterised by the shape thereof
- F21S 41/55: Attachment thereof
- F21S 41/663: by switching light sources (by switching incandescent light sources F21S41/162)
- F21W 2102/13: for high-beam region or low-beam region
- F21W 2102/16: having blurred cut-off lines
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS

## Abstract

A front-lighting system for a vehicle has: a first light source, a second light source, a first primary optics, a second primary optics, a transparent shutter, and a secondary optics. The first primary optics receives light from the first light source and projects it onto the transparent shutter and the secondary optics. The second primary optics receives light from the second light source and projects it onto the transparent shutter. The transparent shutter receives light from the first primary optics and prevents a lower part of it from entering the secondary optics, receives light from the second primary optics and projects it onto the secondary optics, and has a light out-coupling surface and micro-optical structures on a bordering surface. The secondary optics receives light from the first primary optics and the transparent shutter, and projects it onto a road in front of the vehicle.

## Claims

### Claim 1

A front-lighting system for a vehicle, comprising:
a first light source, a second light source, a transparent shutter, and a secondary optics,
a first primary optics arranged to receive light from the first light source and project it onto the transparent shutter and the secondary optics, the secondary optics arranged to receive light from the first primary optics and the transparent shutter and project it onto a road in front of the vehicle, and
a second primary optics arranged to receive light from the second light source and project it onto the transparent shutter, the transparent shutter arranged to receive light from the first light source via the first primary optics and prevent a lower part of it from entering the secondary optics, the transparent shutter further arranged to receive light from the second light source via the second primary optics and project it onto the secondary optics, the transparent shutter comprising:
a flat or freeform light out-coupling surface, and
one surface that comprises micro-optical structures, borders the light out-coupling surface, and is arranged to refract towards the secondary optics at least part of the light received by the transparent shutter from one or both of the first light source and the second light source which part of the light otherwise without the micro-optical structures would be totally internally reflected by a corresponding flat surface bordering the light out-coupling surface and would not reach the secondary optics.

### Claim 2 (depends on 1)

The front-lighting system according to claim 1, wherein
the first light source comprises a low-beam light source, and
the second light source comprises a high-beam light source.

### Claim 3 (depends on 1)

The front-lighting system according to claim 1, wherein
the transparent shutter is further designed to refract the lower part of the light received from the first light source via the first primary optics away from the secondary optics.

### Claim 4 (depends on 1)

The front-lighting system according to claim 1, wherein
the transparent shutter is further designed to project the light received from the second light source via the second primary optics onto the secondary optics through total internal reflection.

### Claim 5 (depends on 1)

The front-lighting system according to claim 1, wherein
the first light source is placed in a first focal plane of the first primary optics.

### Claim 6 (depends on 1)

The front-lighting system according to claim 1, wherein
the second light source is placed in a first focal plane of the second primary optics.

### Claim 7 (depends on 1)

The front-lighting system according to claim 1, wherein
the transparent shutter is placed in one or more of: a second focal plane of the first primary optics, a second focal plane of the second primary optics, and a focal plane of the secondary optics.

### Claim 8 (depends on 1)

The front-lighting system according to claim 1, wherein
the first light source and the second light source are arranged at a distance larger than 20 mm from each other in the front-lighting system.

### Claim 9 (depends on 8)

The front-lighting system according to claim 8, wherein the first light source and the second light source, when mounted in the vehicle, are spaced further apart in a horizontal direction than in a vertical direction.

### Claim 10 (depends on 1)

The front-lighting system according to claim 1, wherein
the first primary optics comprises a first reflector or a first collimator.

### Claim 11 (depends on 1)

The front-lighting system according to claim 1, wherein
the second primary optics comprises a second reflector or a second collimator.

### Claim 12 (depends on 1)

The front-lighting system according to claim 1, wherein the second primary optics is integrated with the transparent shutter.

### Claim 13 (depends on 1)

The front-lighting system according to claim 1, wherein at least one of the first primary optics and the second primary optics comprises a reflective light in-coupling surface or a refractive light in-coupling surface.

### Claim 14 (depends on 1)

The front-lighting system according to claim 1, wherein the transparent shutter comprises a flat or freeform surface where light from the first light source and light from the second light source are incident on opposite sides thereof.