Light emitting device, illumination apparatus including the same, and mounting substrate

Patent metadata

Field	Value
Publication number	US-9488345-B2
Application number	US-201414574952-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 20, 2013
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A light emitting device includes: a substrate; a plurality of light emitting elements mounted in a light emitting area of the substrate, and an intermediate line for electrically connecting a plurality of light emitting elements in parallel or series selectively, the intermediate line being disposed in the light emitting area.

First claim

What is claimed is:

1. A light emitting device comprising:
a substrate;
a plurality of first light emitting elements connected in series and mounted on the substrate;
a plurality of second light emitting elements connected in series and mounted on the substrate;
an intermediate line disposed above the substrate and for electrically connecting the plurality of first and second light emitting elements in parallel or series selectively;
a pair of supply terminals disposed above the substrate;
a first supply line electrically connected to a supply terminal of the pair of supply terminals and disposed above the substrate; and
a second supply line electrically connected to the other supply terminal of the pair of supply terminals and disposed above the substrate, wherein:
at least two of the plurality of first light emitting elements are linearly configured to form a first element string;
at least two of the plurality of second light emitting elements are linearly configured to form a second element string; and
the intermediate line has:
an end connectable to one of the first light emitting elements at a leading end or a tail end of the first element string; and
another end connectable to one of the second light emitting elements at a tail end or a leading end of the second element string.

2. The light emitting device according to claim 1 , further comprising a plurality of sealing members linearly disposed above the substrate, wherein the plurality of first light emitting elements in the first element string are collectively sealed by one of the plurality of sealing members, and the plurality of second light emitting elements in the second element string are collectively sealed by a different one of the plurality of sealing members.

3. The light emitting device according to claim 2 , wherein the plurality of sealing members are disposed in parallel to the straight portion.

4. The light emitting device according to claim 3 , wherein the plurality of sealing members each have a lateral side portion covering a lateral side portion of the straight portion.

5. The light emitting device according to claim 2 , wherein the straight portion is covered with an insulating film.

6. The light emitting device according to claim 2 , wherein the plurality of sealing members each include a wavelength conversion material.

7. The light emitting device according to claim 1 , wherein the intermediate line includes, at each of the end and the another end, a first connection pad to which a wire is connected, the first supply line and the second supply line each include, at an end, a second connection pad to which a wire is connected, the first connection pad at the end of the intermediate line is disposed between the second connection pad of the first supply line and the one of the second light emitting elements at the leading end or the tail end of the second element string, and the first connection pad at the another end of the intermediate line is disposed between the second connection pad of the second supply line and the one of the first light emitting elements at the tail end or the leading end of the first element string.

8. The light emitting device according to claim 1 , wherein the intermediate line includes, at an end, a first connection pad which is connected to one of the first light emitting elements or one of the second light emitting elements via a wire, and the first connection pad is disposed between an adjacent pair of the first light emitting elements or between an adjacent pair of the second light emitting elements.

9. The light emitting device according to claim 1 , wherein an adjacent pair of the plurality of first light emitting elements is connected via a wire, and an adjacent pair of the plurality of second light emitting elements is connected via a wire.

10. The light emitting device according to claim 1 , wherein the plurality of first light emitting elements and the plurality of second light emitting elements are disposed in a same orientation in top view.

11. The light emitting device according to claim 1 , wherein a common power supply provides power to the plurality of first light emitting elements and the plurality of second light emitting elements.

12. An illumination apparatus comprising: the light emitting device according to claim 1 ; and a base to which the light emitting device is attached.

13. A mounting substrate comprising:
a substrate upon which a plurality of first light emitting elements connected in series and a plurality of second light emitting elements connected in series are mounted;
an intermediate line, above the substrate, for electrically connecting the first and second plurality of light emitting elements in parallel or series selectively;
a pair of supply terminals disposed above the substrate;
a first supply line electrically connected to one supply terminal of the pair of supply terminals and disposed above the substrate; and
a second supply line electrically connected to the other supply terminal of the pair of supply terminals and disposed above the substrate, wherein:
at least two of the plurality of first light emitting elements are linearly configured to form a first element string;
at least two of the plurality of second light emitting elements are linearly configured to form a second element string; and
the intermediate line has a straight portion linearly disposed between the first element string and the second element string, and has:
an end connectable to one of the first light emitting elements at a leading end or a tail end of the first element string; and

the other end connectable to one of the second light emitting elements at a tail end or a leading end of the second element string.

14. The light emitting device according to claim 1 , wherein the first and second plurality of light emitting elements are mounted in a light emitting area of the substrate, and the intermediate line is disposed in the light emitting area.

15. The mounting substrate to claim 13 , wherein the first and second plurality of light emitting elements are mounted in a light emitting area of the substrate, and the intermediate line is disposed in the light emitting area.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Abe Masumi
• Ogata Toshifumi
• Ishimori Atsuyoshi
• Sugiura Kenji
• Wada Yasufumi

Classifications

• H10W90/753

  between laterally-adjacent chips · CPC title

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• H10W72/07554

  changes in dispositions · CPC title

• H10W72/5522

  comprising gold [Au] · CPC title

• H10W72/884

  Die-attach connectors and bond wires · CPC title