Radiant energy – Photocells; circuits and apparatus – Signal isolator
Patent
1997-05-19
1998-10-27
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Signal isolator
257 81, 327514, 250239, H01L 3112
Patent
active
058280740
ABSTRACT:
An optoisolator includes one or more light-emitting diodes (LEDs) within a compartment defined by walls of photocells, where the majority of light emitted by the LED impinges directly upon a photocell and is converted to electricity with a minimum of loss. The photocells are attached together by abutting the end of one photocell to the surface of another, as in a butt joint. In one embodiment, the LEDs is inserted into an opening in the compartment and secured by filling the compartment with a light-transmissive, non-conductive material. In another embodiment, the LEDs and photocells are mounted to a substrate. Optionally, each photocell has more than one electrically-independent photosensitive surface.
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Lee John R.
Mini-Systems, Inc.
Westin Edward P.
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