# US 10,502,388 B2 · Vehicle lamp

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- Number: US 10,502,388 B2
- Document ID: US10502388B2
- Status: Granted
- Kind: B2
- Application number: 16/015,044
- Filed: 2018-06-21
- Published: 2018-12-27
- Granted: 2019-12-10
- Earliest claimed: 2017-06-22
- Assignees: Stanley Electric Co., Ltd.
- Applicants: Stanley Electric Co., Ltd.
- Inventors: Hirokazu Saito
- Web page: https://patentgrep.com/patent/US10502388B2

## CPC

- F21S 43/245: emitting light from one or more of its major surfaces
- B60Q 1/44: for indicating braking action {or preparation for braking, e.g. by detection of the foot approaching the brake pedal}
- F21S 43/14: Light emitting diodes [LED]
- F21S 43/237: rod-shaped
- F21S 43/249: with two or more light sources being coupled into the light guide
- F21S 43/27: Attachment thereof
- G02B 6/0005: {the light guides being of the fibre type (G02B6/0003 takes precedence)}
- G02B 6/001: {the light being emitted along at least a portion of the lateral surface of the fibre}
- F21W 2103/35: Brake lights
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS

## Abstract

Provided is a vehicle lamp capable of uniformly emitting light, which is emitted from light sources and incident on one end surface and the other end surface, from the front surface (lateral surface) thereof. The vehicle lamp includes a light guiding rod extending in a prescribed direction. The light guiding rod includes a front surface, and a rear surface. The front surface includes a first region, a second region, and a third region positioned between the first region and the second region. The first region and the second region are configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in a direction orthogonal to the prescribed direction, respectively. A rear surface is configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in the prescribed direction.

## Claims

### Claim 1

A vehicle lamp comprising:
a light guiding rod extending in a prescribed direction, wherein
an outer peripheral surface of the light guiding rod includes a first surface arranged on a front side thereof, and a second surface arranged on a rear side thereof opposite to the front side,
the first surface includes a first region on a side of one end surface of the light guiding rod, a second region on a side of the other end surface of the light guiding rod, and a third region positioned between the first region and the second region and emitting light emitted from a first light source and incident on the one end surface and light emitted from a second light source and incident on the other end surface,
the first region and the second region are configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in a direction orthogonal to the prescribed direction, respectively, and
the second surface is configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in the prescribed direction, wherein
each of the first region and the second region has, in a circumferential direction of the outer peripheral surface, a plurality of knurls, each of which is convex toward an inside of the light guiding rod and extends in the prescribed direction,
the second surface has, in the prescribed direction, a plurality of triangular prism-shaped lens cuts, each of which extends in the direction orthogonal to the prescribed direction, and
each of the triangular prism-shaped lens cuts has two lateral surfaces convex toward the inside of the light guiding rod.

### Claim 2 (depends on 1)

The vehicle lamp according to claim 1, wherein
a cross section of the first surface in a plane thereof orthogonal to the prescribed direction is a semi-circular shape that is convex toward the front side.

### Claim 3 (depends on 1)

The vehicle lamp according to claim 1, wherein
the plurality of lens cuts is provided on the second surface corresponding to the first region, the second region, and the third region.

### Claim 4 (depends on 1)

The vehicle lamp according to claim 1, wherein
the outer peripheral surface of the light guiding rod further includes a pair of third surfaces that connects the first surface and the second surface to each other,
the first surface is a cylindrical surface convex toward the front side and extending in the prescribed direction, and
each of the pair of third surfaces is a curved surface convex toward the inside of the light guiding rod.

### Claim 5 (depends on 4)

The vehicle lamp according to claim 4, wherein
a cross section of the first surface in a plane thereof orthogonal to the prescribed direction is a semi-circular shape that is convex toward the front side.

### Claim 6

A vehicle lamp comprising:
a light guiding rod extending in a prescribed direction, wherein
an outer peripheral surface of the light guiding rod includes a first surface arranged on a front side thereof, and a second surface arranged on a rear side thereof opposite to the front side,
the first surface includes a first region on a side of one end surface of the light guiding rod, a second region on a side of the other end surface of the light guiding rod, and a third region positioned between the first region and the second region and emitting light emitted from a first light source and incident on the one end surface and light emitted from a second light source and incident on the other end surface,
the first region and the second region are configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in a direction orthogonal to the prescribed direction, respectively, and
the second surface is configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in the prescribed direction,
wherein
each of the first region and the second region has, in a circumferential direction of the outer peripheral surface, a plurality of knurls, each of which is convex toward an inside of the light guiding rod and extends in the prescribed direction,
the second surface has a plurality of lens cuts,
each of the lens cuts extends in a direction that crosses the prescribed direction and includes two side surfaces convex toward the inside of the light guiding rod,
the plurality of lens cuts are provided in the predetermined direction,
a curved surface which is concave toward the inside of the light guide rod and extends in the predetermined direction is provided between the plurality of knurls.

### Claim 7 (depends on 6)

The vehicle lamp according to claim 6, wherein
the outer peripheral surface of the light guiding rod further includes a pair of third surfaces that connects the first surface and the second surface to each other,
the first surface is a cylindrical surface convex toward the front side and extending in the prescribed direction, and
each of the pair of third surfaces is a curved surface convex toward the inside of the light guiding rod.

### Claim 8 (depends on 6)

The vehicle lamp according to claim 6, wherein
a cross section of the first surface in a plane thereof orthogonal to the prescribed direction is a semi-circular shape that is convex toward the front side.

### Claim 9 (depends on 6)

The vehicle lamp according to claim 6, wherein
the plurality of lens cuts is provided on the second surface corresponding to the first region, the second region, and the third region.

### Claim 10 (depends on 7)

The vehicle lamp according to claim 7, wherein
the plurality of lens cuts is provided on the second surface corresponding to the first region, the second region, and the third region.

### Claim 11 (depends on 9)

The vehicle lamp according to claim 9, wherein
each of the lens cuts is a triangular prism-shaped lens cut which extends in a direction that crosses the prescribed direction.