Integrated led based illumination device

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.

What is claimed is: 
     
         1 . An LED based illumination device comprising:
 a plurality of LEDs mounted to an LED mounting board;   a first transmissive plate disposed above the plurality of LEDs, the first 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; and   a base reflector structure coupled to the LED mounting board between at least two of the plurality of LEDs and extending to the first transmissive plate over a contact area.   
     
     
         2 . The LED based illumination device of  claim 1 , wherein the contact area between the base reflector structure and the first transmissive plate is shaped as a grid pattern between the plurality of LEDs. 
     
     
         3 . The LED based illumination device of  claim 1 , wherein the contact area between the base reflector structure and the first transmissive plate is a matrix of contact points between the plurality of LEDs. 
     
     
         4 . The LED based illumination device of  claim 1 , further comprising:
 a plurality of total internal reflection (TIR) lens elements disposed between each of the plurality of LEDs and the first transmissive plate, wherein each of the TIR lens elements are disposed within the base reflector structure.   
     
     
         5 . The LED based illumination device of  claim 1 , further comprising:
 an encapsulant material disposed between the base reflector structure and the first transmissive plate over the plurality of LEDs.   
     
     
         6 . The LED based illumination device of  claim 1 , further comprising:
 a second transmissive plate disposed above the first transmissive plate, the second transmissive plate includes a second amount of a second wavelength converting material configured to change the wavelength of a second amount of light emitted by the plurality of LEDs.   
     
     
         7 . The LED based illumination device of  claim 1 , wherein the first 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. 
     
     
         8 . An LED based illumination device comprising:
 a plurality of LEDs mounted to an LED mounting board;   a first transmissive plate disposed above the plurality of LEDs, the first 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 first transmissive plate; and   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 first transmissive plate.   
     
     
         9 . The LED based illumination device of  claim 8 , wherein the dam of thermally conductive material is spaced apart from the dam of reflective material. 
     
     
         10 . The LED based illumination device of  claim 8 , wherein the dam of thermally conductive material is in contact with the dam of reflective material. 
     
     
         11 . 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 plurality of LEDs. 
     
     
         12 . The LED based illumination device of  claim 8 , further comprising:
 a plurality of total internal reflection (TIR) lens elements disposed between each of the plurality of LEDs and the first transmissive plate.   
     
     
         13 . The LED based illumination device of  claim 8 , further comprising:
 an encapsulant material disposed between the plurality of LEDs and the first transmissive plate.   
     
     
         14 . The LED based illumination device of  claim 8 , further comprising:
 a second transmissive plate disposed above the first transmissive plate, the second 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.   
     
     
         15 . The LED based illumination device of  claim 8 , wherein the first 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 . 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, the plurality of LEDs mounted on a first side of the LED mounting board, the LED mounting board having a protrusion of thermally conductive material on the first side of the LED mounting board surrounding the plurality of LEDs, wherein the LED mounting board is coupled to the optically transmissive element at the protrusion, and wherein the LED mounting board includes a void on a second side of the LED mounting board opposite the protrusion.   
     
     
         17 . The LED based illumination device of  claim 16 , wherein the protrusion is formed on the first side of the LED mounting board by forming the void on the second side of the LED mounting board. 
     
     
         18 . The LED based illumination device of  claim 16 , wherein the optically transmissive element is a transmissive plate. 
     
     
         19 . The LED based illumination device of  claim 16 , wherein the optically transmissive element is a shaped lens element. 
     
     
         20 . The LED based illumination device of  claim 16 , further comprising:
 an encapsulant material disposed between the plurality of LEDs and the optically transmissive element.