Lighting apparatus

Patent metadata

Field	Value
Publication number	US-9412915-B2
Application number	US-201514942735-A
Country	US
Kind code	B2
Filing date	Nov 16, 2015
Priority date	Sep 28, 2012
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A lighting apparatus includes a substrate, a plurality of light-emitting dies disposed on the substrate and spaced apart from one another, a continuous structure disposed over the substrate and covering the light-emitting dies within, and a filler. The light-emitting dies each are covered with an individual phosphor coating and the filler is between the continuous structure and the phosphor coating for each of the light-emitting dies. The lighting apparatus has a substantially white appearance when the plurality of light-emitting dies is turned off.

First claim

What is claimed is:

1. A lighting apparatus, comprising:
a substrate with a sidewall;
a plurality of light-emitting dies disposed on the substrate and spaced apart from one another, the light-emitting dies each being covered with an individual phosphor coating;
a continuous structure disposed over the substrate and covering the light-emitting dies without covering the sidewall; and
a filler between the continuous structure and the phosphor coating for each of the light-emitting dies, and being devoid of phosphor;
wherein the lighting apparatus has a substantially white appearance when the plurality of light-emitting dies is turned off.

2. The lighting apparatus of claim 1 , wherein the filler comprises an adhesive material.

3. The lighting apparatus of claim 2 , wherein the adhesive material is transparent and is in direct contact with outer surfaces of individual phosphor coating for each light-emitting die.

4. The lighting apparatus of claim 2 , wherein the adhesive material is a silicone-based material.

5. The lighting apparatus of claim 2 , wherein the adhesive material comprises diffuser particles.

6. The lighting apparatus of claim 1 , wherein the filler comprises air.

7. The lighting apparatus of claim 1 , wherein the light-emitting dies each include a light-emitting diode.

8. The lighting apparatus of claim 1 , wherein the light-emitting dies each are configured to emit blue light.

9. The lighting apparatus of claim 1 , further comprising a substrate on which the plurality of light-emitting dies is disposed.

10. The lighting apparatus of claim 9 , wherein the substrate comprises a printed circuit board, a ceramic substrate, or a silicon substrate.

11. The light apparatus of claim 9 , further comprising a heat sink, wherein the substrate is located on the heat sink, the heat sink is thermally coupled to the LED dies through the substrate.

12. The lighting apparatus of claim 1 , wherein the individual phosphor coatings for the plurality of light-emitting dies are separated from one another.

Assignees

• Epistar Corp

Inventors

• Lee Hsiao-Wen
• Tseng Chi-Xiang
• Tang Yu-Sheng
• Chu Jung-Tang

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• H10W90/00

  Package configurations · CPC title

• F21K9/90

  Methods of manufacture · CPC title

• F21V29/74

  with fins or blades · CPC title

• F21K9/00

  Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers · CPC title