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US 2013/0272015 A1Published application
System and method for mixing light for a led-based linear light source
AssigneeLumenetix, Inc.
InventorMatthew D. Weaver
Life of this patent
Estimating the term…
Abstract
A linear light source and a method of manufacturing the linear light source are disclosed. The linear light source includes a light emitting diode (LED) array, a light pipe, and a shell with a linear exit slit aperture. Cutouts of the light pipe provides a slanted surface to reflect portions of light rays along the length of the light pipe out of the linear exit slit aperture.
Claims20
A linear 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 (TIR) 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 shell with reflective inner surface over the light pipe;
- wherein the shell has an exit aperture along a pipe axis of the light pipe;
- and
- wherein the light pipe has cut outs aligned across from the exit aperture, each of the cut outs having a slanted surface.
5 more elements
A linear light source comprising:
- a plurality of light emitting diodes (LEDs), the LEDs with more than one color type;
- a mixing chamber with reflective walls to collimate light from the plurality of LEDs;
- and
- a light pipe attached over an exit aperture of the mixing chamber extending in at least two directions, the light pipe 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;
- wherein the light pipe has cut outs aligned along the at least two directions, each of the cut outs having a slanted surface;
- and
- wherein the light pipe includes a groove across from a portion of the light pipe over the exit aperture.
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 circuitry for driving the LED array;
- attaching 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;
- forming cut outs from the light pipe, each of the cut outs with a slanted surface for reflecting part of light rays traveling down the light pipe out of the light pipe;
- and
- enclosing the light pipe and the LED array with a shell, the shell having a linear slit aperture extending along the light pipe parallel to the pipe axis and across from the cut outs of the light pipe.
3 more elements
Dependencies are inferred from the claim text.