G - Physics – 03 – B
Patent
G - Physics
03
B
G03B 21/14 (2006.01) F21V 7/04 (2006.01) H04N 5/74 (2006.01) H04N 9/31 (2006.01)
Patent
CA 2471451
An illumination engine for a projection display using light emitting diodes (LEDs) that includes a reflector having a first and second focal points, a source of electro-luminescence located proximate to the first focal paint to emit rays of radiation in a first range of wavelengths that reflect from the reflector and converge substantially at the second focal point, and a light pipe having an first input end and a first output end, the first input end being located proximate to the second focal point to collect substantially all of the radiation and wherein the first output end transmits substantially all of the radiation. The illumination system may further include a substrate having a first side, a platform disposed proximate to the first side of the substrate, and a plurality of reflectors each having a first and second focal points disposed in the platform, each of the first and second focal points disposed proximate to the first side of the substrate, a plurality of sources of electro-luminescence disposed on the first side of the substrate, each of the sources of electro-luminescence disposed substantially coincident with a corresponding one of the first focal points to emit rays of electromagnetic radiation that reflect from a corresponding one of the plurality of reflectors and converges substantially at a corresponding one of the second focal points, a plurality of light pipes disposed in the substrate, each of the light pipes having an input end and an output end, each of the input ends disposed substantially coincident with a corresponding one of the second focal points to collect substantially all of the radiation, wherein each of the output ends transmits substantially all of the radiation emitted by a corresponding one of the plurality of sources.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Wavien Inc.
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