# US 12,183,861 B2 · Light-emitting device

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- Number: US 12,183,861 B2
- Document ID: US12183861B2
- Status: Granted
- Kind: B2
- Application number: 18/522,392
- Filed: 2023-11-29
- Published: 2024-03-21
- Granted: 2024-12-31
- Earliest claimed: 2017-09-29
- Assignees: Nichia Corporation
- Applicants: Nichia Corporation
- Inventors: Tomonori Miyoshi
- Web page: https://patentgrep.com/patent/US12183861B2

## CPC

- H10H 20/8514: {characterised by their shape, e.g. plate or foil}
- H10H 20/853: characterised by their shape
- H10H 20/855: Optical field-shaping means, e.g. lenses
- H10H 29/14: comprising multiple light-emitting semiconductor components
- H10W 90/00: Package configurations
- F21S 41/141: Light emitting diodes [LED]
- H10H 20/856: Reflecting means
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS

## Abstract

A light-emitting device includes: a substrate having an upper surface; at least one light-emitting element on or above the substrate, the at least one light-emitting element having a rectangular shape in a plan view from above the light-emitting device and having an upper surface serving as a light-emitting surface of the at least one light-emitting element; a plate-shaped light-transmissive member having a rectangular shape in a plan view from above the light-emitting device and having a lower surface that faces the upper surface of the at least one light-emitting element; and a light-guiding member that is disposed between the light-emitting element and the light-transmissive member.

## Claims

### Claim 1

A light-emitting device comprising:
a substrate having an upper surface;
at least one light-emitting element on or above the substrate, the at least one light-emitting element having a rectangular shape in a plan view from above the light-emitting device and having an upper surface serving as a light-emitting surface of the at least one light-emitting element;
a plate-shaped light-transmissive member having a rectangular shape in a plan view from above the light-emitting device and having a lower surface that faces the upper surface of the at least one light-emitting element; and
a light-guiding member that is disposed between the light-emitting element and the light-transmissive member,
wherein the upper surface of the at least one light-emitting element with the rectangular shape has a first lateral side and a second lateral side opposite to each other, and a third lateral side and a fourth lateral side opposite to each other,
wherein an upper surface of the light-transmissive member with the rectangular shape has a first lateral side and a second lateral side opposite to each other, and a third lateral side and a fourth lateral side opposite to each other,
wherein the light-transmissive member is disposed on or above the at least one light-emitting element such that, in a plan view from above the light-emitting device, the first lateral side of the upper surface of the light-transmissive member is outside the first lateral side of the upper surface of the at least one light-emitting element, and the second lateral side of the upper surface of the light-transmissive member is inside the second lateral side of the upper surface of the at least one light-emitting element,
wherein the light-guiding member has a first side surface which connects a first lateral side of the lower surface of the light-transmissive member which is opposite to the first lateral side of the upper surface of the light-transmissive member with the at least one light-emitting element; and a second side surface which connects a second lateral side of the lower surface of the light-transmissive member which is opposite to the second lateral side of the upper surface of the light-transmissive member with the at least one light-emitting element, and
wherein an inclined angle of the first side surface of the light-guiding member with respect to the upper surface of the substrate is greater than an inclined angle of the second side surface of the light-guiding member with respect to the upper surface of the substrate.

### Claim 2 (depends on 1)

The light-emitting device according to claim 1, wherein no light-emitting element in the light emitting device overlaps the first lateral side of the upper surface of the light-transmissive member.

### Claim 3 (depends on 1)

The light-emitting device according to claim 1, wherein the light-transmissive member covers the plurality of light-emitting elements.

### Claim 4 (depends on 1)

The light-emitting device according to claim 1, wherein the light-transmissive member comprises a phosphor.

### Claim 5 (depends on 1)

The light-emitting device according to claim 1, wherein a covering member that covers a lateral surface of the at least one light-emitting element and a lateral surface of the light-transmissive member.

### Claim 6 (depends on 5)

The light-emitting device according to claim 5, wherein a distance between the first lateral side of the light-transmissive member and a lateral surface of the covering member is the same as a distance between the second lateral side of the light-transmissive member and a lateral surface of the covering member.

### Claim 7 (depends on 5)

The light-emitting device according to claim 5, wherein a distance between the first lateral side of the at least one light-emitting element and a lateral surface of the covering member is larger than a distance between the second lateral side of the at least one light-emitting element and a lateral surface of the covering member.

### Claim 8 (depends on 5)

The light-emitting device according to claim 5, wherein a portion of the upper surface of the at least one light-emitting element does not overlap the light-guiding member, and the portion of the upper surface of the at least one light-emitting element and the second side surface of the light-guiding member is covered with the covering member.