LIGHT-EMITTING DEVICE

• US 20090140650A1
• Filed: 04/21/2008
• Published: 06/04/2009
• Est. Priority Date: 12/04/2007
• Status: Active Grant

• Current Assignee: Coretronic Corporation
• Original Assignee: Young Lighting Technology Corporation
• Inventors: Wang, Wei-Chih, Yu, Shih-Yuan, Chou, Wei-Jen
• Granted Patent: US 7,791,276 B2
• Time in Patent Office: Days
• US Class Current: 313/512
• 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 33/22 Roughened surfaces, e.g. at the interface between epitaxial layers

Abstract

A light-emitting device includes a package housing, at least one light-emitting element, a plurality miniature elements, and a package filler. The package housing includes a recess. The light-emitting element is disposed in the recess. The miniature elements are formed on the light-emitting element. Light from the light-emitting element is output to the exterior of the recess in a predetermined direction by adjustment of the miniature elements. The package filler is filled in the recess and covers the light-emitting element and miniature elements.

Claims

1. A light-emitting device, comprising:

a package housing providing a recess;

at least one light-emitting element disposed in the recess;

a plurality of miniature elements formed on the light-emitting element, wherein light from the light-emitting element is output to the exterior of the recess in a predetermined direction by adjustment of the miniature elements; and

a package filler filled in the recess and covering the light-emitting element and miniature elements.

2. The light-emitting device as claimed in claim 1, wherein each miniature element comprises a triangular pyramid.

3. The light-emitting device as claimed in claim 1, wherein each miniature element comprises a square-based pyramid.

4. The light-emitting device as claimed in claim 1, wherein each miniature element comprises a cone.

5. The light-emitting device as claimed in claim 1, wherein the light-emitting element comprises a light-emitting diode chip.

6. A light-emitting device, comprising:

a package housing providing a recess;

a first light-emitting element disposed in the recess;

a plurality of first miniature elements formed on the first light-emitting element, wherein light from the first light-emitting element is output to the exterior of the recess in a first direction by adjustment of the first miniature elements;

a second light-emitting element disposed in the recess and separated from the first light-emitting element;

a plurality of second miniature elements formed on the second light-emitting element, wherein light from the second light-emitting element is output to the exterior of the recess in a second direction by adjustment of the second miniature elements;

a third light-emitting element disposed in the recess and separated from the first and second light-emitting elements; and

a plurality of third miniature elements formed on the third light-emitting element, wherein light from the third light-emitting element is output to the exterior of the recess in a third direction by adjustment of the third miniature elements.

7. The light-emitting device as claimed in claim 6, wherein each first miniature element comprises a triangular pyramid.

8. The light-emitting device as claimed in claim 6, wherein each first miniature element comprises a square-based pyramid.

9. The light-emitting device as claimed in claim 6, wherein each first miniature element comprises a cone.

10. The light-emitting device as claimed in claim 6, wherein the first, second, and third light-emitting elements comprise a light-emitting diode chip, respectively.

11. The light-emitting device as claimed in claim 6, wherein the first light-emitting element comprises a red-light light-emitting diode chip, the second light-emitting element comprises a green-light light-emitting diode chip, and the third light-emitting element comprises a blue-light light-emitting diode chip.

12. The light-emitting device as claimed in claim 6, further comprising a package filler filled in the recess and covering the first, second, and third light-emitting elements.