Light-emitting device

Patent metadata

Field	Value
Publication number	US-11545473-B2
Application number	US-202117207481-A
Country	US
Kind code	B2
Filing date	Mar 19, 2021
Priority date	Mar 24, 2020
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A light-emitting device according to the present invention comprises: a mounting board; a plurality of light-emitting elements that each include a supporting substrate and a semiconductor structure layer, the supporting substrate being disposed on the mounting board, and the semiconductor structure layer being formed on the supporting substrate and including a light-emitting layer, a wavelength conversion member that covers the plurality of light-emitting elements above the light-emitting elements and converts a wavelength of a light emitted from the light-emitting layer; a translucent member that covers a lower surface of the wavelength conversion member and covers the semiconductor structure layer on the supporting substrate; and a resin member filled between the plurality of light-emitting elements, the resin member being formed of a resin material containing particles having a light reflectivity. The translucent member includes a thin film portion having a constant film thickness between the wavelength conversion member and the resin member in a region between the plurality of light-emitting elements, and the constant film thickness is smaller than a distance between a top surface of the supporting substrate and a lower surface of the wavelength conversion member.

First claim

What is claimed is:

1. A light-emitting device comprising:
a mounting board;
a plurality of light-emitting elements that each include a supporting substrate and a semiconductor structure layer, the supporting substrate being disposed on the mounting board, and the semiconductor structure layer being formed on the supporting substrate and including a light-emitting layer;
a wavelength conversion member that covers the plurality of light-emitting elements above the light-emitting elements and converts a wavelength of a light emitted from the light-emitting layer;
a translucent member that covers a lower surface of the wavelength conversion member and covers the semiconductor structure layer on the supporting substrate; and
a resin member filled between the plurality of light-emitting elements, the resin member being formed of a resin material containing particles having a light reflectivity,
wherein:
the translucent member includes a thin film portion having a constant film thickness between the wavelength conversion member and the resin member in a region between the plurality of light-emitting elements, and the constant film thickness is smaller than a distance between a top surface of the supporting substrate and a lower surface of the wavelength conversion member.

2. The light-emitting device according to claim 1 , wherein
the thin film portion has a thickness smaller than a distance between a top surface of the light-emitting element and the lower surface of the wavelength conversion member.

3. The light-emitting device according to claim 1 , wherein
the resin member extends toward the semiconductor structure layer from an end portion of one light-emitting element and covers a part of the top surface of the supporting substrate in the top surface of the supporting substrate, and the end portion faces an adjacent light-emitting element.

4. The light-emitting device according to claim 1 , wherein
in one region opposing the region between the plurality of light-emitting elements in the lower surface of the wavelength conversion member, a surface roughness is large compared with another region.

5. The light-emitting device according to claim 1 , wherein
a plurality of grooves are formed in a region opposing a region between two adjacent light-emitting elements in the lower surface of the wavelength conversion member.

6. The light-emitting device according to claim 5 , wherein
the plurality of grooves are formed to be parallel to a line connecting centers of the two adjacent light-emitting elements.

7. The light-emitting device according to claim 1 , wherein:
in the lower surface of the wavelength conversion member, a surface area ratio is in a range of 105% or more and 150% or less, assuming that the surface area ratio is 100% when the lower surface of the wavelength conversion member is a perfect mirrored surface, and
the surface area ratio is a ratio of an actual surface area of the lower surface to a mirrored surface area of the lower surface expressed as a percentage.

Assignees

• Stanley Electric Co Ltd

Inventors

• Koike Kyotaro
• Liang Ji-Hao
• Harada Mitsunori
• Ide Shunya
• Kotani Hiroshi
• Owada Soji
• Ando Satoshi

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H01L25/0753 Primary

  Electricity · mapped topic

• H01L33/60

  Electricity · mapped topic

• H01L33/54

  Electricity · mapped topic

• H01L33/505

  Electricity · mapped topic