# US 12,111,032 B2 · Lamp for vehicle

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- Number: US 12,111,032 B2
- Document ID: US12111032B2
- Status: Granted
- Kind: B2
- Application number: 18/080,131
- Filed: 2022-12-13
- Published: 2023-06-29
- Granted: 2024-10-08
- Earliest claimed: 2021-12-29
- Assignees: SL Corporation
- Applicants: SL Corporation
- Inventors: Dongjin Ko; Changwoo Baek; Jin-Sup Shin; Jong Ryoul Park
- Web page: https://patentgrep.com/patent/US12111032B2

## CPC

- F21S 41/36: Combinations of two or more separate reflectors
- 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 41/29: Attachment thereof (for achieving variable light distribution F21S41/63)
- F21S 41/295: {specially adapted to projection lenses}
- F21S 41/675: by moving reflectors
- F21S 45/47: Passive cooling, e.g. using fins, thermal conductive elements or openings
- F21S 41/147: the main emission direction of the LED being angled 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 41/67: by acting on reflectors
- F21V 5/007: {Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008)}
- F21V 5/008: {Combination of two or more successive refractors along an optical axis}
- F21W 2102/14: having vertical cut-off lines; specially adapted for adaptive high beams, i.e. wherein the beam is broader but avoids glaring other road users
- F21W 2103/60: Projection of signs from lighting devices, e.g. symbols or information being projected onto the road
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS

## Abstract

A lamp for a vehicle using micromirrors includes a variable beam forming part that irradiates light and forms variable beam patterns. In particular, the variable beam forming part includes a first optical part that irradiates the light; a reflection part including a plurality of micromirrors and configured to reflect the light of the first optical part; a second optical part that transmits the light reflected by the reflection part; and a housing that supports the first optical part, the second optical part, and the reflection part. The plurality of micromirrors are configured to adjust their postures between a first posture in which the light incident from the first optical part is reflected in a first direction and a second posture in which the light incident from the first optical part is reflected in a second direction.

## Claims

### Claim 1

A lamp for a vehicle comprising a variable beam forming part that irradiates light and forms variable beam patterns, wherein the variable beam forming part comprises:
a first optical part that irradiates the light;
a reflection part including a plurality of micromirrors that reflect the light from the first optical part;
a second optical part that transmits the light reflected by the reflection part; and
a housing that supports the first optical part, the second optical part, and the reflection part,
wherein postures of the plurality of micromirrors are adjusted to a first posture in which the light incident from the first optical part is reflected in a first direction or to a second posture in which the light incident from the first optical part is reflected in a second direction,
wherein the first optical part comprises:
a first optical group that irradiates light for forming a first variable beam pattern; and
a second optical group that irradiates light for forming a second variable beam pattern different from the first variable beam pattern,
wherein the second optical part is disposed on a path of light reflected in the second direction by the plurality of micromirrors and comprises:
a plurality of lenses that transmit the light reflected from the reflection part,
wherein each of the first optical group and the second optical group includes a first lens and a second lens,
wherein the lamp further comprises a support bracket, which comprises:
a first support that supports the first lens of the first optical group and the first lens of the second optical group; and
a second support that supports the second lens of the first optical group and the second lens of the second optical group,
wherein the second support comprises:
a first support portion that supports the second lens of the first optical group; and
a second support portion that supports the second lens of the second optical group, and
wherein a step is formed between the first support portion and the second support portion so that the first support portion protrudes farther than the second support portion, thereby allowing an optical path length between the first lens and the second lens of the first optical group to be longer than an optical path length between the first lens and the second lens of the second optical group.

### Claim 2 (depends on 1)

The lamp for a vehicle of claim 1, wherein the first optical group comprises:
a first light source that irradiates a first light; and
a first lens set including a plurality of lenses spaced apart from one another and configured to transmit the first light, and
wherein the second optical group comprises:
a second light source that irradiates a second light; and
a second lens set including a plurality of lenses spaced apart from one another and configured to transmit the second light.

### Claim 3 (depends on 2)

The lamp for a vehicle of claim 2, wherein the first light source is disposed so that an optical axis of the first light source coincides with an optical axis of the first lens set, and
wherein the second light source is disposed so that an optical axis of the second light source is spaced apart from an optical axis of the second lens set.

### Claim 4 (depends on 1)

The lamp for a vehicle of claim 1, further comprising:
a first fixing plate that fixes the first lens of the first optical group and the first lens of the second optical group to the first support; and
a second fixing plate that fixes the second lens of the first optical group and the second lens of the second optical group to the second support,
wherein the second fixing plate includes a shield that obstructs some of the light from being transmitted through the second lens of the second optical group.

### Claim 5 (depends on 1)

The lamp for a vehicle of claim 1, wherein, in the second optical part, a number of aspherical lenses among the plurality of lenses is greater than a number of spherical lenses.

### Claim 6 (depends on 1)

The lamp for a vehicle of claim 1, wherein, in the second optical part, a number of lenses with a positive refractive power among the plurality of lenses is greater than a number of lenses with a negative refractive power.