Light emitting diode package

Abstract

A light emitting diode package. A package substrate has first and second electrode structures and a light emitting diode is mounted on the package substrate and electrically connected to the first and second electrode structures. A resin encapsulant is made of a transparent resin to seal the light emitting diode. A plurality of transparent spherical particles having a refractive index higher than the transparent resin are dispersed in the resin encapsulant.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a sectional view illustrating a conventional LED package;

FIG. 2 is a sectional view illustrating an LED package according to an embodiment of the present invention;

FIG. 3 is a schematic view illustrating the light focusing principle by a transparent spherical particle adopted in the present invention;

FIG. 4 is a sectional view illustrating a LED package according to another embodiment of the present invention; and

FIG. 5 is a Scanning Electron Microscope (SEM) picture showing polystyrene beads used in the present invention.

Claims

1. A light emitting diode package comprising: a package substrate having first and second electrode structures;a light emitting diode mounted on the package substrate and electrically connected to the first and second electrode structures;a resin encapsulant made of a transparent resin and encapsulating the light emitting diode; anda plurality of transparent spherical particles dispersed in the resin encapsulant, the spherical particles having a refractive index higher than that of the transparent resin.

2. The light emitting diode package according to claim 1, wherein the transparent spherical particles have a refractive index lower than that of the light emitting diode.

3. The light emitting diode package according to claim 2, wherein the transparent spherical particles have a refractive index of 1.5 to 2.4.

4. The light emitting diode package according to claim 1, wherein the transparent spherical particles are sized 0.5 to 8 μm.

5. The light emitting diode package according to claim 1, wherein the transparent spherical particles comprise polystyrene beads.

6. The light emitting diode package according to claim 1, wherein the resin encapsulant further comprises phosphor powder dispersed therein.

7. The light emitting diode package according to claim 1, wherein the resin encapsulant comprises one selected from the group consisting of a silicone resin, an epoxy resin and a mixture thereof.

8. The light emitting diode package according to claim 1, wherein the resin encapsulant comprises a first resin encapsulant having a first refractive index and a second encapsulant having a second refractive index, wherein the first refractive index is greater than the second refractive index, wherein the first resin encapsulant seals the light emitting diode mounted on the package substrate and the second resin encapsulant is formed on the first resin encapsulant, and wherein the transparent spherical particles are disposed in the second resin encapsulant and have a refractive index larger than that of the second resin encapsulant.

9. The light emitting diode package according to claim 1, wherein the package substrate comprises a cavity with an upward-inclined inner wall, and the cavity provides an area for mounting the light emitting diode and defines an area for forming the resin encapsulant.