Light emitting device and lighting apparatus

Patent metadata

Field	Value
Publication number	US-2016265758-A1
Application number	US-201615055963-A
Country	US
Kind code	A1
Filing date	Feb 29, 2016
Priority date	Mar 11, 2015
Publication date	Sep 15, 2016
Grant date	—

Abstract

A light emitting device includes: a substrate; one or more LED (light emitting diode) elements mounted on a substrate; and a radiator unit made of metal paste and arranged on a rear surface opposite to a principal surface on which the one or more LED elements are mounted. The height Ta of the radiator unit from a rear surface is less than thickness Tb of substrate.

First claim

1 . A light emitting device comprising:
a substrate; one or more LED (light emitting diode) elements mounted on the substrate; and a radiator unit made of metal paste arranged on a rear surface opposite to a principal surface on which the one or more LED elements are mounted, wherein, a height of the radiator unit from the rear surface is less than a thickness of the substrate.

2 . The light emitting device according to claim 1 ,
wherein the one or more LED elements mounted on the principal surface comprise a plurality of LED elements, and the radiator unit is arranged in an area of the rear surface, the area opposing the plurality of LED elements.

3 . The light emitting device according to claim 2 ,
wherein the radiator unit is higher at a position opposing each of the plurality of LED elements than at an other position.

4 . The light emitting device according to claim 2 ,
wherein, the radiator unit includes a plurality of partial radiator units arranged discretely on the rear surface, each of the plurality of partial radiator units being arranged at a position opposing a different one of the plurality of LED elements.

5 . The light, emitting device according to claim 2 ,
wherein the plurality of LED elements are arranged in a line on the principal surface, and the radiator unit is arranged in a shape corresponding to a shape of the line on the rear surface.

6 . The light emitting device according to claim 1 ,
wherein the radiator unit includes a first layer which is in contact with the rear surface, and a second layer which is stacked on the first layer, and the metal paste forming the first layer has a binder percentage content that is larger than a binder percentage content in the metal paste forming the second layer.

7 . The light emitting device according to claim 1 ,
wherein the metal paste contains copper as a metal component.

8 . A lighting apparatus comprising:
a light emitting device according to claim 1 ; and a base to which the light emitting device is attached, the base having a recess part in which the radiator unit is housed.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Funakoshi Masashi

Classifications

• H10W90/753

  between laterally-adjacent chips · CPC title

• H10W90/00

  Package configurations · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K2203/0545

  Pattern for applying drops or paste; Applying a pattern made of drops or paste · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title