Light-emitting device with miniature elements

• US 7,791,276 B2
• Filed: 04/21/2008
• Issued: 09/07/2010
• Est. Priority Date: 12/04/2007
• Status: Active Grant

• Current Assignee: Coretronic Corporation
• Original Assignee: Young Lighting Technology Corporation
• Inventors: Chou, Wei-Jen, Yu, Shih-Yuan, Wang, Wei-Chih
• Primary Examiner(s): Ton, Toan
• Assistant Examiner(s): Hanley, Britt D
• Application Number:
  US12/106,487
• Publication Number:
  US 20090140650A1
• Time in Patent Office: 869 Days
• Field of Search: 313/111, 257/98, 362/555
• 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;

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 passes through the first miniature elements to the exterior of the recess in a first direction;

a second light-emitting element disposed in the recess;

a plurality of second miniature elements formed on the second light-emitting element, wherein light from the second light-emitting element passes through the second miniature elements to the exterior of the recess in a second direction, and the shape of the first miniature elements and the shape of the second miniature elements are different, and the first direction crosses the second direction; and

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

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

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

4. The light-emitting device as claimed in claim 1, wherein each of the first miniature elements comprises a cone.

5. The light-emitting device as claimed in claim 1, wherein each of the first light-emitting elements and the second 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 passes through the first miniature elements is output to the exterior of the recess in a first direction

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 passes through the second miniature elements to the exterior of the recess in a second direction;

a third light-emitting element disposed in the recess and separated from the first and the 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 passes through the third miniature elements to the exterior of the recess in a third direction;

wherein at least two of the first direction, the second direction, and the third direction cross each other, and at least two of the first miniature elements, the second miniature elements, and the third miniature elements have different shapes.

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

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

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

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