Method and apparatus for powering fluorescent lighting
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 9, 2001
Grant Date -
N/A
app pub date -
Jun 16, 2000
filing date -
Jun 16, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a power supply for a fluorescent light, particularly a sub-miniature fluorescent light (SFL) which provides compensation for temperature and age effects of the fluorescent light. One or more SFLs are powered by a variable output anode controller and a variable output cathode controller, wherein the illumination output of the SFLs is selectively adjustable based upon the voltage output of one or both of the anode and cathode controllers. In a first example of implementation of the invention, an illumination feedback circuit is provided to the anode/cathode controller, wherein the voltage output is adjusted to compensate for diminished illumination, caused for example by cold operating conditions or age of the sensed SFLs. In a second form of the present invention, a temperature feedback circuit is provided to the anode/cathode controller to provide the aforesaid voltage adjustment to compensate for diminished illumination. In another aspect of the present invention, the SFLs are placed into a ready-state for being presently illuminated based upon sensing of a wake-up signal.
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