Integrated LED based illumination device

Patent metadata

Field	Value
Publication number	US-9528666-B2
Application number	US-201514937722-A
Country	US
Kind code	B2
Filing date	Nov 10, 2015
Priority date	Sep 6, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

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.

First claim

What is claimed is:

1. An LED based illumination device comprising:
a plurality of LEDs;
an optically transmissive element disposed above the plurality of LEDs, the optically transmissive element 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; and
an LED mounting board of thermally conductive material having a first side and a second side that is opposite the first side, the plurality of LEDs mounted on the first side of the LED mounting board, the LED mounting board having a protrusion of the LED mounting board that projects from the first side of the LED mounting board surrounding the plurality of LEDs and an indentation opposite the protrusion in the second side of the LED mounting board, wherein the LED mounting board is coupled to the optically transmissive element at the protrusion.

2. The LED based illumination device of claim 1 , wherein the protrusion is formed on the first side of the LED mounting board by forming the indentation on the second side of the LED mounting board.

3. The LED based illumination device of claim 1 , wherein the optically transmissive element is a transmissive plate.

4. The LED based illumination device of claim 1 , wherein the optically transmissive element is a shaped lens element.

5. The LED based illumination device of claim 1 , further comprising:
an encapsulant material disposed between the plurality of LEDs and the optically transmissive element.

Assignees

• Xicato Inc

Inventors

• Harbers Gerard
• Kakuda Tyler Robin
• Bierhuizen Serge J A
• Eberle Stefan

Classifications

• F21V3/12

  the coatings comprising photoluminescent substances · CPC title

• H10W90/00

  Package configurations · CPC title

• F21K9/64 Primary

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title

• F21V29/763

  the planes containing the fins or blades having the direction of the light emitting axis · CPC title

• F21V29/74

  with fins or blades · CPC title