LIGHT-EMITTING DEVICE

• US 20160276553A1
• Filed: 03/17/2016
• Published: 09/22/2016
• Est. Priority Date: 03/18/2015
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: OKUBO, Masaki
• Granted Patent: US 9,893,038 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/36 characterised by the electrodes
• CPC Class Codes: H01L 33/38 with a particular shape
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• 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 base; wiring patterns formed on the base; and light-emitting elements arranged on the base and/or the wiring patterns. The light-emitting elements include: a first group of light-emitting elements that are covered with a first sealing member and constitute a first light-emitting unit, and a second group of light-emitting elements that are covered with a second sealing member and constitute a second light-emitting unit. The wiring patterns include first wiring patterns that drive the first light-emitting unit, and second wiring patterns that drive the second light-emitting unit. The second wiring patterns are separated from each other such that at least one of the first wiring patterns is interposed between adjacent ones of the second wiring patterns. A wire connects said adjacent ones of the second wiring patterns.

Claims

1. A light-emitting device comprising:

a base;

a plurality of wiring patterns formed on the base; and

a plurality of light-emitting elements arranged on the base and/or the wiring patterns;

wherein the plurality of light-emitting elements include;

a first group of light-emitting elements that are covered with a first sealing member and constitute a first light-emitting unit, and

a second group of light-emitting elements that are covered with a second sealing member and constitute a second light-emitting unit, the second sealing member surrounding the first sealing member;

wherein the wiring patterns include a plurality of first wiring patterns that drive the light-emitting elements of the first light-emitting unit, and a plurality of second wiring patterns that drive the light-emitting elements of the second light-emitting unit;

wherein the second wiring patterns are separated from each other such that at least one of the first wiring patterns is interposed between adjacent ones of the second wiring patterns; and

wherein a wire connects said adjacent ones of the second wiring patterns, the wire straddling said at least one first wiring pattern that is interposed between said adjacent ones of the second wiring patterns.

2. The light-emitting device according to claim 1, wherein emission spectra of the first light-emitting unit and the second light-emitting unit differ.

3. The light-emitting device according to claim 1, wherein the first sealing member and the second sealing member each contain a wavelength conversion member.

4. The light-emitting device according to claim 1, wherein color temperatures of the first light-emitting unit and the second light-emitting unit differ.

5. The light-emitting device according to claim 1, further comprising:

a light reflective resin that separates the first sealing member from the second sealing member,

wherein the wire is covered with the light reflective resin.

6. The light-emitting device according to claim 1, wherein the first light-emitting unit and the second light-emitting unit are concentrically formed.

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

wherein the first wiring patterns and the second wiring patterns each include a pad portion, and

wherein, in a plan view, each of the pad portions is arranged at a respective corner of the base.

8. The light-emitting device according to claim 1 further comprising a third group of light-emitting elements that constitute a third light-emitting unit, the third light-emitting unit being located on an outer side of the second light-emitting unit.