# US 2019/0170316 A1 · Vehicle lighting fixture

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- Number: US 2019/0170316 A1
- Document ID: US20190170316A1
- Status: Published application
- Kind: A1
- Application number: 16/324,009
- Filed: 2017-08-08
- Published: 2019-06-06
- Earliest claimed: 2016-08-08
- Assignees: Ichikoh Industries, Ltd.
- Applicants: Ichikoh Industries, Ltd.
- Inventors: Yasuhiro OKUBO
- Web page: https://patentgrep.com/patent/US20190170316A1

## CPC

- F21S 43/14: Light emitting diodes [LED]
- B60Q 1/143: {combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers}
- F21S 41/141: Light emitting diodes [LED]
- F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S 41/151: arranged in one or more lines
- F21S 41/153: arranged in a matrix
- F21S 41/25: Projection lenses
- F21S 41/255: Lenses with a front view of circular or truncated circular outline
- F21S 41/663: by switching light sources (by switching incandescent light sources F21S41/162)
- F21S 45/40: Cooling of lighting devices
- B60Q 2300/45: Special conditions, e.g. pedestrians, road signs or potential dangers
- F21W 2102/15: wherein the light is emitted under L-shaped cut-off lines, i.e. vertical and horizontal cutoff lines
- F21Y 2105/12: characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
- F21Y 2115/10: Light-emitting diodes [LED]
- 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
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A vehicle light fixture comprises a light source unit and a lens. The light source unit comprises: a substrate; a first light-emitting chip array having first light-emitting chips arranged in a horizontal direction on the substrate; a second chip array having second light-emitting chips arranged in a horizontal direction on the substrate; and a third light-emitting chip array having third light-emitting chips arranged in a horizontal direction on the substrate. The second light-emitting chip array is positioned beneath the first light-emitting chip array in the plumb-bob vertical direction, and separated by a first distance. The third light-emitting chip array is positioned beneath the second light-emitting chip array in the plumb-bob vertical direction, and separated by a second distance. The first distance is longer than the second distance.

## Claims

### Claim 1

A vehicular lamp comprising:
a light source unit; and
a lens disposed in front of the light source unit, wherein,
the light source unit comprises:
a substrate;
a first light-emitting chip array comprising a plurality of semiconductor-type first light-emitting chips disposed on the substrate and arrayed along a horizontal direction;
a second light-emitting chip array comprising a plurality of semiconductor-type second light-emitting chips disposed on the substrate and arrayed along the horizontal direction; and
a third light-emitting chip array comprising a plurality of semiconductor-type third light-emitting chips disposed on the substrate and arrayed along the horizontal direction,
the second light-emitting chip array is disposed on the substrate at a first distance below the first light-emitting chip array in the vertical direction,
the third light-emitting chip array is disposed on the substrate at a second distance below the second light-emitting chip array in the vertical direction, and
the first distance is larger than the second distance.

### Claim 2 (depends on 1)

The vehicular lamp according to claim 1, wherein,
the second light-emitting chip array comprises the second light-emitting chips by a number smaller than or equal to the number of the first light-emitting chips of the first light-emitting chip array, and
the third light-emitting chip array comprises the third light-emitting chips by a number smaller than or equal to the number of the second light-emitting chips of the second light-emitting chip array.

### Claim 3 (depends on 1)

The vehicular lamp according to claim 1, wherein the number of the first light-emitting chips is the same as the number of the second light-emitting chips and the number of the third light-emitting chips.

### Claim 4 (depends on 1)

The vehicular lamp according to claim 1, wherein the first light-emitting chip array, the second light-emitting chip array, and the third light-emitting chip array emit light that forms a portion of a driving-beam light distribution pattern.

### Claim 5 (depends on 1)

The vehicular lamp according to claim 1, wherein,
the light source unit comprises a fourth light-emitting chip array comprising a plurality of semiconductor-type fourth light-emitting chips disposed on the substrate and arrayed along the horizontal direction,
the fourth light-emitting chip array is disposed on the substrate above and apart from the first light-emitting chip array in the vertical direction, and
the number of the fourth light-emitting chips is smaller than the number of the first light-emitting chips.

### Claim 6

A vehicular lamp comprising:
a light source unit; and
a lens disposed in front of the light source unit, wherein,
the light source unit comprises:
a substrate;
a first light-emitting chip array comprising a plurality of semiconductor-type first light-emitting chips disposed on the substrate and arrayed along a horizontal direction; and
a fourth light-emitting chip array comprising a plurality of semiconductor-type fourth light-emitting chips disposed on the substrate and arrayed along the horizontal direction,
the fourth light-emitting chip array is disposed on the substrate above and apart from the first light-emitting chip array in a vertical direction, and
the number of the fourth light-emitting chips is smaller than the number of the first light-emitting chips.

### Claim 7 (depends on 5)

The vehicular lamp according to claim 5, wherein,
the fourth light-emitting chip array is a portion for forming a marking light distribution pattern, and
a light distribution pattern formed by light from the fourth light-emitting chip array is incident below a light distribution pattern formed by light from the first light-emitting chip array.

### Claim 8 (depends on 5)

The vehicular lamp according to claim 5, wherein the number of the fourth light-emitting chips disposed on an inner side of a vehicle with reference to a vertical line extending through a lamp optical axis is larger than the number of the fourth light-emitting chips disposed on an outer side of the vehicle.

### Claim 9 (depends on 5)

The vehicular lamp according to claim 5, wherein,
the light source unit comprises at least one upper light-emitting chip array disposed on the substrate above and apart from the fourth light-emitting chip array in the vertical direction,
the upper light-emitting chip array comprises an array of upper light-emitting chips disposed on the substrate in the horizontal direction, the array of the upper light-emitting chips being the same as the array of the fourth light-emitting chips of the fourth light-emitting chip array, and
the upper light-emitting chip array is a portion for forming a marking light distribution pattern incident to incident on a screen below incident light emitted from the fourth light-emitting chip array.

### Claim 10 (depends on 9)

The vehicular lamp according to claim 9, wherein the fourth light-emitting chips of the fourth light-emitting chip array and the light-emitting chips of the upper light-emitting chip array are controlled to be turned on at different timings.

### Claim 11 (depends on 1)

The vehicular lamp according to claim 1, wherein the substrate comprises a multilayer wiring board comprising multiple layers having wiring patterns stacked in a thickness direction.