08348467 is referenced by 2 patents and cites 5 patents.

An LED replacement-lamp design concept comprising tapered waveguides to provide uniform and broad light distribution is disclosed. Currently, most LED-based replacement lamps for tubular fluorescent lamps place discrete surface-mount LEDs directly on a cylindrical base, which produce wasteful, non-uniform and directional illumination unsuitable for large space and high-ceiling applications. An LED lamp design, proposed as a tubular lamp replacement, comprises of a plurality of discrete LEDs mounted on a common substrate, where all light from each LED is immediately guided and broadened through a tapered waveguide long enough to seamlessly terminate at the lamp's semi-circularly curved cover surface. Many such LED-waveguide assemblies can fill the entire curved cover with diffused and uniform light distribution, resulting in illumination over broad angular ranges. The proposed lamp has a ā€œDā€ shaped cross-section wherein the lamp's flat side is used as a heat-sink base to be placed against the ceiling or some blocking surface.

Title
Light distribution using tapered waveguides in LED-based tubular lamps as replacements of linear fluorescent lamps
Application Number
13/135303
Publication Number
8348467 (B2)
Application Date
June 30, 2011
Publication Date
January 8, 2013
Inventor
Mujibun Nisa Khan
Colts Neck
NJ, US
IPC
F21V 33/00
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