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US 2013/0272016 A1Published application
System and method for mixing and collimating light emitted from an array having different color light emitting diodes
AssigneeLumenetix, Inc.
InventorMatthew D. Weaver
Life of this patent
Estimating the term…
Abstract
A collimated light source and a method of manufacturing the collimated light source are disclosed. The collimated light source includes a light emitting diode (LED) array, a light pipe, and a light collimation optics. The light collimation optics can expand over an exit aperture of light pipe.
Claims20
A collimated light source comprising:
- an electronic circuitry to drive light emitting diodes (LEDs);
- a plurality of LEDs coupled to the electronic circuitry, the LEDs with more than one color type;
- a light pipe on the plurality of LEDs to provide total internal reflection of light rays from the plurality of LEDs for light ray angles larger than a critical angle with respect to a normal vector of a surface of the light pipe;
- and
- a light collimator over the light pipe to provide an uniform beam wave front exiting through the light pipe from the plurality of LEDs, the light collimator being an optics overhanging over and centered on an exit aperture of the light pipe.
2 more elements
A flat collimated light source comprising:
- a plurality of LEDs;
- a light mixing pipe optically bonded over the plurality of LEDs;
- a hemispherical lens optically bonded to the light mixing pipe with a convex side facing the light mixing pipe;
- a bowl shaped shell over and around the plurality of LEDs and the light pipe with a reflective inner surface facing the light pipe;
- and
- a clear plate covering a concave opening of the bowl shaped shell;
- wherein the hemispherical lens includes a flat surface attached to the clear plate.
4 more elements
A method of manufacturing a linear light source comprising:
- providing a light emitting diode (LED) array, the LED array including multiple color types of LED;
- coupling an electronic circuit to the LED array for driving the LED array;
- optically bonding a light pipe over the LED array with a pipe axis of the light pipe extending away from the LED array, the light pipe providing total internal reflection (TIR) of light rays from the LED array for light ray angles larger than a critical angle with respect to a normal vector of a surface of the light pipe;
- and
- optically bonding a light collimator on an exit aperture of the light pipe with a center of the light collimator aligned on the exit aperture.
2 more elements
Dependencies are inferred from the claim text.