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.