Patent ID: 7312589

Claim:
A driver control method for controlling a variety of cold cathode fluorescent lamps (CCFLs), each CCFL having a different frequency requirement, being realized in a circuit configuration comprising a micro control unit, a plurality of input/output ports, a plurality of analog-to-digital converter, a comparator, a programmable frequency divider (PFD) and two programmable pulse generators (PPGs), comprising a PPG 0 and a PPG 1 , the method comprising the steps of: programming the output of the PFD to be used as the control signal for activating the PPG 0 and the PPG 1 ; utilizing control software to modify a clock source received by the PFD for enabling the PFD to selectively output a frequency matching the differing tube frequency requirement of each CCFL; and utilizing the transition frequency of the PFD to control the activation of the PPG 0 and the PPG 1 in an alternative manner.