Knowledge-based driver apparatus for high lumen maintenance...

Details Knowledge-based driver apparatus for high lumen maintenance... Knowledge-based driver apparatus for high lumen maintenance...

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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