Radiant energy – Photocells; circuits and apparatus – Temperature control of photocell
Reexamination Certificate
2006-06-28
2009-10-27
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Temperature control of photocell
Reexamination Certificate
active
07608815
ABSTRACT:
A method of compensating a photo sensor (and a corresponding photo sensor with compensation) insures the accuracy of the photo sensor, e.g., over environmental variations or photo cell variations. The method comprises: providing a first signal indicative of a light level; providing a second signal indicative of an environmental parameter, e.g., temperature; and calculating, responsive to the first signal and the second signal, a compensated signal that is indicative of an absolute light level. The calculating can be performed by a processor and utilize calibration and compensation information or parameters, which can be obtained experimentally.
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Anderson J. David T.
Anderson James A.
Cho Yong Jeong
Jacklin Gregory A.
Kurz Gerald E.
Bethards Charles W.
Epps Georgia Y
Streetlight Intelligence, Inc.
Wyatt Kevin
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