Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Chao-Cheng Lu0
Date of Patent
February 19, 2008
0Patent Application Number
111103260
Date Filed
April 4, 2005
0Patent Primary Examiner
Patent abstract
A precision voltage control circuit applicable to a PWM (Pulse Width Modulation) circuit can offer CCFL (Cold Cathode Fluorescent Lamp) or EEFL (External Electrode Fluorescent Lamp) tubes a stable high frequency voltage or current, so that each CCFL or EEFL tube can get an appropriate compensation current and an optimal emitting efficiency and enhance its emitting quality. The circuit also has an overload current, low current, and overload voltage and low voltage protective circuit to protect the CCFL or EEFL tubes from being injured. The circuit can also be applied to the TFT LCD TV or other large LCD panels, and develops the best display effect of each LCD tube.
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