LED monitoring without external light detection
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United States of America Patent
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Jan 10, 1989
Issued Date -
N/A
app pub date -
Dec 12, 1983
filing date -
May 22, 1981
priority date (Note) -
Expired
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Abstract
An apparatus and method for monitoring the light intensity of individual light emitting diodes in an array of light emitting diodes. Means are provided to measure current flow through an unenergized diode adjacent to an energized diode. Current flow through the unenergized diode is porportional to light intensity of the light emitted by its energized adjacent diode.
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