Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2009-10-21
2011-12-06
Philogene, Haiss (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S169100, C315S291000, C315S224000, C315S360000
Reexamination Certificate
active
08072163
ABSTRACT:
A knowledge-based driver is provided for powering a solid-state light source with a constant current, including a memory that stores lumens per amp and volts per amp performance characterizations of the light source over time, and a controller that operates in a test mode to estimate the light source degradation based on voltage feedback obtained at a predetermined test current value, and to adjust the drive current in normal operating mode according to the estimated device degradation to implement constant lumens control without external optical feedback components.
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Aurongzeb Deeder
Payne Kevin Carr
Roberts Bruce Richard
Fay Sharpe
General Electric Company
Philogene Haiss
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