LED PACKAGE STRUCTURE CAPABLE OF ADJUSTING THE SPATIAL COLOR UNIFORMITY AND THE LIGHT DISTRIBUTION CURVE

• US 20130169144A1
• Filed: 01/03/2012
• Published: 07/04/2013
• Est. Priority Date: 01/03/2012
• Status: Abandoned Application

• Current Assignee: Lustrous Technology Ltd.
• Original Assignee: Lustrous Technology Ltd.
• Inventors: CHOU, KAO-HSU, HSUEH, CHIA-LUNG, LI, YI-JU, WU, SHIH-MIN, LIU, DAWSON
• Application Number:
  US13/342,365
• Publication Number:
  US 20130169144A1
• Time in Patent Office: Days
• US Class Current: 313/498
• CPC Class Codes: H01J 1/66 Supports for luminescent material
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• 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 33/508 having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer, wavelength conversion layer with a concentration gradient of the wavelength conversion material

Abstract

A LED package structure capable of adjusting the spatial color uniformity and the light distribution curve includes a substrate unit, a light-emitting unit, a transparent package unit, and a phosphor package unit. The light-emitting unit includes at least one light-emitting element for generating a light-emitting source to show a predetermined light distribution curve. The transparent package unit includes a transparent package resin body covering the light-emitting element. The phosphor package unit includes a phosphor package resin body covering the transparent package resin body. Hence, when the light-emitting source generated by the light-emitting element is transformed into a light-projecting source through the transparent package resin body and the phosphor package resin body sequentially, and the spatial color uniformity and the light distribution curve of the light-projecting source can be adjusted according to the phosphor package resin body having a non-uniform thickness.

Claims

1. A LED package structure capable of adjusting the spatial color uniformity and the light distribution curve, comprising:

a substrate unit including at least one substrate body;

a light-emitting unit including at least one light-emitting element disposed on the at least one substrate body and electrically connected to the substrate body, wherein a light-emitting source generated by the at least one light-emitting element shows a predetermined light distribution curve;

a transparent package unit including a transparent package resin body formed on the at least one substrate body to cover the at least one light-emitting element, wherein the transparent package resin body has a fixing camber formed on the top surface thereof, and the transparent package resin body has a fixed thickness; and

a phosphor package unit including a phosphor package resin body formed on the at least one substrate body to cover the transparent package resin body, wherein the phosphor package resin body has an adjustable camber formed on the top surface thereof and adjusted according the predetermined light distribution curve shown by the light-emitting source, and the thickness of the phosphor package resin body is adjusted to form a non-uniform thickness according to a non-uniform height of the adjustable camber of the phosphor package resin body relative to the at least one substrate body;

wherein the light-emitting source generated by the at least one light-emitting element is transformed into a light-projecting source through the transparent package resin body and the phosphor package resin body sequentially, and the spatial color uniformity and the light distribution curve of the light-projecting source is adjusted according to the phosphor package resin body having the non-uniform thickness.

2. The LED package structure of claim 1, wherein the at least one substrate body is a circuit substrate, and the at least one light-emitting element is a blue LED bare die.

3. The LED package structure of claim 1, wherein the transparent package resin body is formed by silicone or epoxy.

4. The LED package structure of claim 1, wherein the phosphor package resin body is formed by mixing silicone and a plurality of phosphor particles or by mixing epoxy and a plurality of phosphor particles.

5. The LED package structure of claim 1, wherein the adjustable camber of the phosphor package resin body is extended gradually away from the fixing camber of the transparent package resin body in a direction away from the at least one substrate body, thus the non-uniform thickness of the phosphor package resin body is increased gradually in a direction away from the at least one substrate body.

6. The LED package structure of claim 1, wherein the phosphor package resin body is divided into at least two phosphor layers, a junction of the at least two phosphor layers has a first thickness, each phosphor layer has a second thickness formed on one end thereof for contacting the at least one substrate body, and the first thickness is smaller than the second thickness.

7. A LED package structure capable of adjusting the spatial color uniformity and the light distribution curve, comprising:

a substrate unit including at least one substrate body;

a light-emitting unit including at least one light-emitting element disposed on the at least one substrate body and electrically connected to the substrate body;

a transparent package unit including a transparent package resin body formed on the at least one substrate body to cover the at least one light-emitting element, wherein the transparent package resin body has a fixing camber formed on the top surface thereof, the transparent package resin body has a fixed thickness, and the light-emitting source generated by the at least one light-emitting element passes through the transparent package resin body to form a light-passing source that shows a predetermined light distribution curve; and

a phosphor package unit including a phosphor package resin body formed on the at least one substrate body to cover the transparent package resin body, wherein the phosphor package resin body has an adjustable camber formed on the top surface thereof and adjusted according the predetermined light distribution curve shown by the light-passing source, and the thickness of the phosphor package resin body is adjusted to form a non-uniform thickness according to a non-uniform height of the adjustable camber of the phosphor package resin body relative to the at least one substrate body;

wherein the light-emitting source generated by the at least one light-emitting element is transformed into a light-projecting source through the transparent package resin body and the phosphor package resin body sequentially, and the spatial color uniformity and the light distribution curve of the light-projecting source is adjusted according to the phosphor package resin body having the non-uniform thickness.

8. The LED package structure of claim 7, wherein the adjustable camber of the phosphor package resin body is extended gradually away from the fixing camber of the transparent package resin body in a direction away from the at least one substrate body, thus the non-uniform thickness of the phosphor package resin body is increased gradually in a direction away from the at least one substrate body.

9. The LED package structure of claim 7, wherein the phosphor package resin body is divided into at least two phosphor layers, a junction of the at least two phosphor layers has a first thickness, each phosphor layer has a second thickness formed on one end thereof for contacting the at least one substrate body, and the first thickness is smaller than the second thickness.

10. A LED package structure capable of adjusting the spatial color uniformity and the light distribution curve, comprising:

a substrate unit including at least one substrate body;

a light-emitting unit including at least one light-emitting element disposed on the at least one substrate body and electrically connected to the substrate body;

a transparent package unit including a transparent package resin body formed on the at least one substrate body to cover the at least one light-emitting element, wherein the light-emitting source generated by the at least one light-emitting element passes through the transparent package resin body to form a light-passing source that shows a predetermined light distribution curve, the transparent package resin body has an adjustable camber formed on the top surface thereof and adjusted according the predetermined light distribution curve shown by the light-passing source, and the transparent package resin body has an adjustable thickness; and

a phosphor package unit including a phosphor package resin body formed on the at least one substrate body to cover the transparent package resin body, wherein the phosphor package resin body has a fixed camber formed on the top surface thereof, and the thickness of the phosphor package resin body is adjusted to form a non-uniform thickness according to a non-uniform height of the adjustable camber of the transparent package resin body relative to the at least one substrate body;

wherein the light-emitting source generated by the at least one light-emitting element is transformed into a light-projecting source through the transparent package resin body and the phosphor package resin body sequentially, and the spatial color uniformity and the light distribution curve of the light-projecting source is adjusted according to the phosphor package resin body having the non-uniform thickness.