LED-based illumination modules with PTFE color converting surfaces
AssigneeXicato, Inc.
InventorsPeter K. Tseng, Gerard Harbers
Life of this patent
Estimating the term…
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 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 a first portion of the light conversion sub-assembly is a polytetrafluoroethylene (PTFE) material and an interior surface of the first portion includes a first type of wavelength converting material that is physically separated from the plurality of LEDs, wherein the light conversion sub-assembly includes a bottom reflector insert disposed on top of the first plane that includes the PTFE material.
An apparatus comprising:
- a plurality of Light Emitting Diodes (LEDs) mounted to a mounting board;
- and
- a primary light mixing cavity configured to direct light emitted from the plurality of LEDs to an output port, and wherein a first portion of the primary light mixing cavity is a polytetrafluoroethylene (PTFE) material and an interior surface of the first portion includes a first type of wavelength converting material, wherein a second portion of the primary light mixing cavity is the PTFE material and an interior surface of the second portion includes a second type of wavelength converting material.
A method comprising:
- emitting light having a first wavelength into a light conversion cavity, the light conversion cavity having an area comprising a polytetrafluoroethylene (PTFE) material and 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 a window comprising the PTFE material.
Dependencies are inferred from the claim text.