LIGHT-EMITTING DEVICE AND ILLUMINATION LIGHT SOURCE

• US 20170077172A1
• Filed: 09/08/2016
• Published: 03/16/2017
• Est. Priority Date: 09/10/2015
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: KIBA, Keiji
• Application Number:
  US15/259,702
• Publication Number:
  US 20170077172A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/52 Encapsulations
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

A light-emitting device includes a substrate, a first light emitter that is disposed on the substrate and emits light, and a second light emitter that is disposed on the substrate and emits light of a color different from a color of the light emitted by the first light emitter. The first light emitter and the second light emitter are disposed along a periphery of the substrate.

Claims

1. A light-emitting device, comprising:

a substrate;

a first light emitter that is disposed on the substrate and emits light; and

a second light emitter that is disposed on the substrate and emits light of a color different from a color of the light emitted by the first light emitter,

wherein the first light emitter and the second light emitter are alternately arranged along a periphery of the substrate.

2. The light-emitting device according to claim 1, wherein:

the first light emitter includes a plurality of first light-emitting elements arranged in a line and a first sealant that seals the plurality of first light-emitting elements and emits fluorescent light when illuminated by light from the plurality of first light-emitting elements, and

the second light emitter includes a plurality of second light-emitting elements arranged in a line and a second sealant that seals the plurality of second light-emitting elements and emits fluorescent light when illuminated by light from the plurality of second light-emitting elements.

3. The light-emitting device according to claim 2, wherein in an area in which the first light emitter and the second light emitter cross paths, two light-emitting elements of the plurality of first light-emitting elements are electrically connected by a wiring pattern formed on the substrate, and two light-emitting elements of the plurality of second light-emitting elements are electrically connected by a conductor not in direct contact with the wiring pattern.

4. The light-emitting device according to claim 3, wherein the second sealant seals the conductor.

5. The light-emitting device according to claim 4, wherein the second sealant that seals the conductor is formed continuously as a whole.

6. The light-emitting device according to claim 5, wherein the second sealant has a lower concentration of phosphor than a concentration of phosphor of the first sealant.

7. The light-emitting device according to claim 1, wherein:

the substrate is a polygonal,

the first light emitter and the second light emitter are alternately arranged along each side of the substrate, and

a same one of the first light emitter and the second light emitter is disposed adjacent every corner of the substrate.

8. The light-emitting device according to claim 1, wherein:

the substrate has an elongated shape, and

the first light emitter and the second light emitter are alternately arranged along at least one long side of the substrate, the long side being included in the periphery of the substrate.

9. An illumination light source including the light-emitting device according to claim 1.

10. A light-emitting device, comprising:

a substrate;

a first light emitter that is disposed on the substrate and emits first light having a first color; and

a second light emitter that is disposed on the substrate and emits second light having a second color different from the first color, wherein;

the first light emitter has a first portion and a second portion,

the second light emitter has a first portion and a second portion,

the first portion of the first light emitter and the first portion of the second light emitter are alternately arranged along a first peripheral line of the substrate, and

the second portion of the first light emitter and the second portion of the second light emitter are alternately arranged along a second peripheral line of the substrate located at an inner side of the first peripheral line.

11. The light-emitting device according to claim 10, wherein:

each of the first and second portions of the first light emitter includes a plurality of first light-emitting elements and a first sealant that seals the plurality of first light-emitting elements and emits fluorescent light when illuminated by light from the plurality of first light-emitting elements, and

each of the first and second portions of the second light emitter includes a plurality of second light-emitting elements and a second sealant that seals the plurality of second light-emitting elements and emits fluorescent light when illuminated by light from the plurality of second light-emitting elements.

12. The light-emitting device according to claim 11,

wherein the first light emitter is continuously formed so as to form a ring shape.

13. The light-emitting device according to claim 12,

wherein the first portion and the second portion of the second light emitter are connected by a connecting pattern that passes under the first light emitter.

14. A light-emitting device, comprising:

a substrate;

a first light emitter that is disposed on the substrate and emits first light having a first color; and

a second light emitter that is disposed on the substrate and emits second light having a second color different from the first color, wherein;

the first light emitter has a first portion and a second portion,

the second light emitter has a first portion and a second portion,

the first portion of the first light emitter and the first portion of the second light emitter are alternately arranged along a first line, and

the second portion of the first light emitter and the second portion of the second light emitter are alternately arranged along a second line parallel with the first line.

15. The light-emitting device according to claim 14, wherein:

each of the first and second portions of the first light emitter includes a plurality of first light-emitting elements and a first sealant that seals the plurality of first light-emitting elements and emits fluorescent light when illuminated by light from the plurality of first light-emitting elements, and

each of the first and second portions of the second light emitter includes a plurality of second light-emitting elements and a second sealant that seals the plurality of second light-emitting elements and emits fluorescent light when illuminated by light from the plurality of second light-emitting elements.

16. The light-emitting device according to claim 14,

wherein the first line and the second line form a ring shape, respectively.