Ultra thin radiation management and distribution systems...

Details Ultra thin radiation management and distribution systems... Ultra thin radiation management and distribution systems...

2007-08-28

2007-08-28

Wood, Kevin (Department: 2874)

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

C385S036000, C362S623000, C362S628000

Reexamination Certificate

active

10191372

ABSTRACT:
A thin-profile, optically efficient lighting device for use with, among other things, flat information displays, includes a combination of three optically coupled light propagating structures, fabricated of electromagnetic flux transmitting materials. The first structure may be a generally elongated optical pipe adapted to receive light from at least one light source such as a light emitting diode. Radiation from additional sources is coupled into the first structure by a second structure which injects the radiation thereinto. Light injected into the first structure is directed into the third structure where it is redirected so that it propagates out of the third structure uniformly and efficiently and in a direction that is substantially perpendicular to the surface of the third structure. A device can include multiple bodies of any or all three structures.

REFERENCES:
patent: 5359691 (1994-10-01), Tai et al.
patent: 5461547 (1995-10-01), Ciupke et al.
patent: 6293683 (2001-09-01), Okada

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