H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 37/00 (2006.01) H02M 1/42 (2007.01) H02H 7/00 (2006.01) H02H 7/10 (2006.01) H05B 33/08 (2006.01) H01J 1/304 (2006.01)
Patent
CA 2544774
A power supply device for a CCFL or other lamp type regulates a current output to the CCFL regardless of lamp length and/or short circuit conditions. The power supply device for a lamp comprises a voltage regulating module that receives an input voltage signal and generates an output voltage signal that is substantially constant. A voltage driving module receives the output voltage signal and a detection signal, and generates a driving voltage signal. A current limiting module receives the driving voltage signal and generates a current supply signal that is substantially constant regardless of an impedance of a load that receives the current supply signal. A detection module communicates generates the detection signal. The detection signal is indicative of a voltage across the load. The voltage driving module discontinues the driving voltage signal if the detection signal indicates that the voltage is greater than a threshold.
Chlebek Kevin
Lee James
Borden Ladner Gervais Llp
Marketing Displays Inc.
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