Light-emitting device array with individual cells

• US 9,373,606 B2
• Filed: 08/30/2010
• Issued: 06/21/2016
• Est. Priority Date: 08/30/2010
• Status: Active Grant

• Current Assignee: Bridgelux Incorporated
• Original Assignee: Bridgelux Incorporated
• Inventors: Helbing, Rene Peter, Xu, Tao
• Primary Examiner(s): Kim, Su C
• Application Number:
  US12/871,774
• Publication Number:
  US 20100320486A1
• Time in Patent Office: 2,122 Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/32 of an individual layer connector
• 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 2933/0025 relating to coatings
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 2933/005 relating to encapsulations
• CPC Class Codes: H01L 2933/0058 relating to optical field-shaping elements
• CPC Class Codes: H01L 33/40 Materials therefor
• CPC Class Codes: H01L 33/42 Transparent materials
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• 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 33/56 Materials, e.g. epoxy or silicone resin

Abstract

A light-emitting device and a method for manufacturing the light-emitting device is disclosed. Such a light-emitting device comprises a substrate, a plurality of cells disposed on the substrate, and a plurality of semiconductor dice, wherein each of the plurality of cells accommodates at least one of the plurality of dice. Each of the plurality of cells may be filled with an encapsulant, phosphor or a mixture of an encapsulant with phosphor to control light characteristics of the light-emitting device. In an alternative aspect, cells may be filled with an encapsulant, and comprise a transparent cover coated with or filled with phosphors to control light characteristics of the light-emitting device.

Claims

1. A light-emitting apparatus, comprising:

a substantially flat substrate;

a plurality of cells, shaped and dimensioned to eliminate cross-talk, disposed on the substantially flat substrate;

a plurality of light emitting diodes (LEDs), wherein each of the plurality of cells accommodates at least one of the plurality of LEDs;

a plurality of transparent covers, wherein each cover is in direct contact with a corresponding one of the plurality of cells, wherein the plurality of transparent covers comprises first, second, and third transparent covers, and wherein the second transparent cover is horizontally adjacent to the first transparent cover and the third transparent cover is vertically adjacent to the first transparent cover; and

only a single transparent cover disposed over at least the first, second, and third transparent covers.

2. The apparatus according to claim 1, wherein an encapsulant is disposed into each of the plurality of cells.

3. The apparatus according to claim 1, wherein phosphor is disposed into at least one of the plurality of cells.

4. The apparatus according to claim 1, wherein an encapsulant filled with phosphor is disposed into at least one of the plurality of cells.

5. The apparatus according to claim 4, wherein an encapsulant is disposed into each of the plurality of cells not containing the encapsulant filled with phosphor.

6. The apparatus according to claim 4, wherein at least two of the plurality of cells contain the encapsulant, wherein the encapsulant is filled with phosphor of a different color in each cell of the at least two cells.

7. The apparatus according to claim 1, further comprising an encapsulant disposed into each of the plurality of cells.

15. The apparatus according to claim 1, wherein the plurality of cells are defined by a plurality of support members disposed on the substantially flat substrate, and wherein the plurality of transparent covers are each disposed on a top surface of the each of the support members.

16. The apparatus according to claim 1, further comprising a transparent cover disposed over the plurality of transparent covers.

8. A method for manufacturing a light-emitting device, comprising:

manufacturing a substantially flat substrate;

disposing a plurality of cells, shaped and dimensioned to eliminate crosstalk, on the substantially flat substrate;

disposing a plurality of light emitting diodes (LEDs) into the plurality of cells, wherein each of the plurality of cells accommodates at least one of the plurality of LEDs;

disposing a plurality of transparent covers over the plurality of cells such that each cover is in direct contact with a corresponding one of the plurality of cells, wherein the plurality of transparent covers comprises first, second, and third transparent covers, and wherein the second transparent cover is horizontally adjacent to the first transparent cover and the third transparent cover is vertically adjacent to the first transparent cover; and

disposing only a single transparent cover over at least the first, second, and third transparent covers.

9. The method according to claim 8, further comprising disposing an encapsulant into each of the plurality of cells.

10. The method according to claim 8, further comprising disposing phosphor into at least one of the plurality of cells.

11. The method according to claim 8, further comprising disposing an encapsulant filled with phosphor into at least one of the plurality of cells.

12. The method according to claim 11, wherein an encapsulant is disposed into each of the plurality of cells not containing the encapsulant filled with phosphor.

13. The method according to claim 11, wherein at least two of the plurality of cells contains the encapsulant, wherein the encapuslant is filled with phosphor of a different color in each cell of the at least two cells.

14. The method according to claim 8, further comprising disposing an encapsulant into each of the plurality of cells.

17. The method according to claim 8, further comprising:

disposing a plurality of support members on the substantially flat substrate to define the plurality of cells; and

disposing each of the transparent covers on a top surface of each of the support members.

18. The method according to claim 8, further comprising disposing a transparent cover over the plurality of transparent covers.