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Title:
INTEGRATED LED BASED ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/039833
Kind Code:
A4
Abstract:
A light emitting diode (LED) based illumination device include a plurality of LEDS mounted to mounting board and includes a transmissive plate disposed above the LEDs. The transmissive plate includes an amount of wavelength converting material configured to change a wavelength of an amount of light emitted by the plurality of LEDs. A base reflector structure is coupled to the LED mounting board and the transmissive plate between at least two of the LEDs. In another configuration, a dam of reflective material surrounds the LEDs and is coupled to the LED mounting board and the transmissive plate, while a dam of thermally conductive material surrounds the dam of reflective material. In another configuration, the LED mounting board has a protrusion of thermally conductive material that surrounds the LEDs and is coupled to the transmissive plate, and has a void on the side opposite the protrusion.

Inventors:
HARBERS GERARD (US)
KAKUDA TYLER ROBIN (US)
BIERHUIZEN SERGE J A (US)
EBERLE STEFAN (US)
Application Number:
PCT/US2013/058529
Publication Date:
July 17, 2014
Filing Date:
September 06, 2013
Export Citation:
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Assignee:
XICATO INC (US)
International Classes:
H01L25/075; F21K99/00; F21V3/04; F21V9/40; F21V7/00; F21V13/04; F21Y101/02; F21Y105/00; H01L33/50; H01L33/60; H01L33/64
Attorney, Agent or Firm:
HALBERT, Michael J. (4010 Moorpark Avenue Suite 21, San Jose California, US)
Download PDF:
Claims:
AMENDED CLAIMS

received by the International Bureau on 28 May 2014 (28.05.2014)

What is claimed is:

1. An LED based illumination device comprising:

a plurality of LEDs mounted to an LED mounting board;

a transmissive plate disposed above the plurality of LEDs, the transmissive plate includes a first amount of a first wavelength converting material configured to change a wavelength of an amount of light emitted by the plurality of LEDs;

a reflective material structure surrounding the plurality of LEDs and coupled to the LED mounting board and the transmissive plate;

a thermally conductive material structure surrounding the reflective material structure, wherein the dam of thermally conductive material is coupled to the LED mounting board and the transmissive plate; and

a housing surrounding the LED mounting board, the reflective material structure, and the thermally conductive material structure disposed within the housing.

2. (Cancelled)

3. (Cancelled)

4. (Cancelled)

5. (Cancelled)

6. (Cancelled)

7. (Cancelled)

8. An LED based illumination device comprising:

a plurality of LEDs mounted to an LED mounting board;

a transmissive plate disposed above the plurality of LEDs, the transmissive plate includes a first amount of a first wavelength converting material configured to change a wavelength of an amount of light emitted by the plurality of LEDs;

a dam of reflective material surrounding the plurality of LEDs and coupled to the LED mounting board and the transmissive plate; a dam of thermally conductive material surrounding the dam of reflective material, wherein the dam of thermally conductive material is coupled to the LED mounting board and the transmissive plate; and

a housing surrounding the LED mounting board, the dam of reflective material, and the dam thermally conductive material disposed within the housing.

9. The LED based illumination device of Claim 8, wherein the housing includes at least one mechanical feature to interface the LED based illumination device with a heat sink.

10. The LED based illumination device of Claim 8, wherein the housing is spaced apart from the dam of thermally conductive material.

11. The LED based illumination device of Claim 8, wherein the dam of thermally conductive material is spaced apart from the dam of reflective material.

12. The LED based illumination device of Claim 8, wherein the dam of thermally conductive material is in contact with the dam of reflective material.

13. The LED based illumination device of Claim 8, wherein the dam of reflective material optically shields the dam of thermally conductive material from the amount of light emitted by the LEDs.

14. The LED based illumination device of Claim 8, further comprising:

an encapsulant material disposed between the plurality of LEDs and the first transmissive plate.

15. The LED based illumination device of Claim 8, wherein the transmissive plate includes a second amount of a second wavelength converting material configured to change a wavelength of the amount of light emitted by the plurality of LEDs.

16. A method comprising:

bonding a dam of thermally conductive material to an LED mounting board; mounting a plurality of LEDs onto the LED mounting board and electrically coupling each of the LEDs to the LED mounting board;

depositing a flowable, reflective material within the dam of thermally conductive material such that the flowable, reflective material wicks up the edge of the dam of thermally conductive material to shield the dam of thermally conductive material from exposure to light emitted from LEDs; and

bonding a transmissive plate to the dam of thermally conductive material over the plurality of LEDs, wherein the transmissive plate includes an amount of a wavelength converting material configured to change a wavelength of an amount of light emitted by the plurality of LEDs.

17. The method of Claim 16, wherein the depositing the flowable, reflective material within the dam of thermally conductive material involves depositing the flowable, reflective material in a space between the plurality of LEDs.

18. The method of Claim 16, wherein the dam of thermally conductive material is a metal structure.

19. The method of Claim 18, wherein the bonding of the metal structure to the LED mounting board involves gluing or soldering the metal structure to the LED mounting board.

20. The method of Claim 16, wherein the bonding of the transmissive plate to the dam of thermally conductive material involves gluing the transmissive plate to the dam of thermally conductive material.

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