LED-based illumination modules with PTFE color converting surfaces
AssigneeXicato, Inc.
InventorsPeter K. Tseng, Gerard Harbers
Life of this patent
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Abstract
An illumination module includes a plurality of Light Emitting Diodes (LEDs) and a light conversion sub-assembly mounted near but physically separated from the LEDs. The light conversion sub-assembly includes at least a portion that is a polytetrafluoroethylene (PTFE) material that also includes a wavelength converting material. Despite being less reflective than other materials that may be used in the light conversion sub-assembly, the PTFE material unexpectedly produces an increase in luminous output, compared to other more reflective materials, when the PTFE material includes a wavelength converting material.
Claims20
An LED based illumination device comprising:
- a light source sub-assembly having a plurality of Light Emitting Diodes (LEDs) mounted on an LED mounting board;
- and
- a light conversion sub-assembly configured to mix and color convert light emitted from the light source sub-assembly, wherein a first portion of the light conversion sub-assembly is a polytetrafluoroethylene (PTFE) material, wherein the first portion includes a bottom reflector disposed over the LED mounting board, and wherein a second portion of the light conversion sub-assembly is an output port that includes a first type of wavelength converting material that is physically separated from the plurality of LEDs.
An LED based illumination device comprising:
- a light source sub-assembly having a plurality of Light Emitting Diodes (LEDs) mounted in a first plane;
- and
- a light conversion sub-assembly mounted adjacent to the first plane and configured to mix and color convert light emitted from the light source sub-assembly, wherein the light conversion sub-assembly comprises a sidewall and a bottom reflector comprising a polytetrafluoroethylene (PTFE) material and an output port including a first wavelength converting material, wherein the first wavelength converting material is physically separated from the plurality of LEDs.
A method comprising:
- emitting light having a first wavelength into a light conversion cavity, the light conversion cavity having a bottom reflector insert comprising a polytetrafluoroethylene (PTFE) material and an output port including a first type of wavelength converting material;
- converting a portion of the light having the first wavelength into light having a second wavelength with the first type of wavelength converting material;
- reflecting a remainder portion of the light having the first wavelength with the PTFE material;
- and
- emitting the light having the first wavelength and the light having the second wavelength from the light conversion cavity through the output port.
Dependencies are inferred from the claim text.