Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2006-11-14
2006-11-14
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
Reexamination Certificate
active
07135664
ABSTRACT:
A feedback method on occasion independently senses a characteristic of light produced by each of several light sources in a lighting apparatus. The sensed value of that characteristic is compared to a reference value for the respective light source and that light source's operation is adjusted accordingly. This method has particular application in a lighting apparatus that produces different lighting effects by varying the intensity of different colors of light produced by the various light sources. The feedback method compensates for light emission variation as the sources age, thus ensuring that the lighting apparatus continues to produce the desired lighting effects. This enables multiple lighting apparatus in an area to be calibrated to the same standard so that uniform illumination is provided.
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Hamilton Douglas M.
Vornsand Steven J.
Bui-Pho Pascal M.
Carmen Matthew, LLC
Emteq Lighting and Cabin Systems, Inc.
Epps Georgia
Haas George E.
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