Light-emitting device

Patent metadata

Field	Value
Publication number	US-2017084587-A1
Application number	US-201615268681-A
Country	US
Kind code	A1
Filing date	Sep 19, 2016
Priority date	Sep 18, 2015
Publication date	Mar 23, 2017
Grant date	—

Abstract

A light-emitting device includes a substrate, a light-emitting component, a wavelength conversion component, an adhesive and a reflective layer. The light-emitting component is disposed on the substrate. The wavelength conversion component includes a high-density phosphor layer and a lower-density phosphor layer. The adhesive is formed between the light-emitting device and the high-density phosphor layer. The reflective layer is formed above the substrate and covers a lateral surface of the light-emitting component, a lateral surface of the adhesive and a lateral surface of the wavelength conversion component.

First claim

What is claimed is:

1 . A light-emitting device, comprises:
a substrate; a light-emitting component disposed on the substrate; a wavelength conversion layer comprising a high-density phosphor layer and a low-density phosphor layer; an adhesive layer formed between the light-emitting component and the high-density phosphor layer; and a reflective layer formed above the substrate and covering a lateral surface of the light-emitting component, a lateral surface of the adhesive layer and a lateral surface of the wavelength conversion layer.

2 . The light-emitting device according to claim 1 , wherein the substrate has a lateral surface and the reflective layer further covers the lateral surface of the substrate.

3 . The light-emitting device according to claim 1 , wherein the light-emitting component comprises a first electrode and a second electrode, and the reflective layer further covers a lateral surface of the first electrode and a lateral surface of the second electrode.

4 . The light-emitting device according to claim 1 , wherein the adhesive layer comprises a first lateral portion, the first lateral portion covers a portion of the lateral surface of the light-emitting component, and the reflective layer covers another portion of the lateral surface of the light-emitting component.

5 . The light-emitting device according to claim 1 , wherein the reflective layer covers the entire lateral surface of the light-emitting component.

6 . The light-emitting device according to claim 1 , wherein the wavelength conversion layer covers the entire light-emitting component.

7 . The light-emitting device according to claim 1 , wherein an area of the wavelength conversion layer is equal to or larger than an area of the light-emitting component.

8 . The light-emitting device according to claim 7 , wherein a ratio of the area of the wavelength conversion layer and the area of the light-emitting component ranges between 1 and 1.35.

9 . The light-emitting device according to claim 1 , wherein the reflective layer comprises a first reflective portion, and the first reflective portion surrounds the light-emitting component.

10 . The light-emitting device according to claim 9 , wherein the first reflective portion has a first reflective surface facing the lateral surface of the light-emitting component.

11 . The light-emitting device according to claim 10 , wherein the first reflective surface is a convex surface facing the lateral surface of the light-emitting component.

12 . The light-emitting device according to claim 11 , wherein the convex surface connects a lower surface of the wavelength conversion layer to the lateral surface of the light-emitting component.

13 . The light-emitting device according to claim 1 , comprising:
a plurality of the light-emitting components disposed on the substrate; wherein the adhesive layer comprises a second lateral portion formed between adjacent two of the light-emitting components.

14 . The light-emitting device according to claim 1 , comprising:
a plurality of the light-emitting components disposed on the substrate; wherein the reflective layer comprises a second reflective portion formed between adjacent two of the light-emitting components.

15 . The light-emitting device according to claim 14 , wherein the second reflective portion has a second reflective surface, and the second reflective surface is a concave surface facing the wavelength conversion layer.

16 . The light-emitting device according to claim 14 , wherein the second reflective portion has a second reflective surface, and the second reflective surface is a convex surface facing the wavelength conversion layer.

17 . The light-emitting device according to claim 1 , wherein, comprising:
a plurality of the light-emitting components disposed on the substrate; wherein each light-emitting component comprises a first electrode and a second electrode, and the reflective layer covers a lateral surface of the first electrode and a lateral surface of the second electrode.

18 . The light-emitting device according to claim 1 , wherein a ratio of a phosphor particle density of the high-density phosphor layer and a phosphor particle density of the low-density phosphor layer ranges between 1 and 10 15 .

19 . The light-emitting device according to claim 1 , wherein a ratio of a thickness of the low-density phosphor layer and a thickness of the high-density phosphor layer ranges between 1 and 1000.

Assignees

• Genesis Photonics Inc

Inventors

• Hung Cheng-Wei
• Chang Jui-Fu
• Hung Chin-Hua
• Lin Yu-Feng

Classifications

• H10W90/724

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H10W90/00 Primary

  Package configurations · CPC title

• H01L25/0753 Primary

  Electricity · mapped topic

• H01L2933/0058

  Electricity · mapped topic

• H01L33/60

  Electricity · mapped topic