Patent ID: 8598806
Filing Date: 2013-12-03
Classification: H05B

Abstract:
1. A method for driving one or more cold-cathode fluorescent lamps, the method comprising: generating at least one drive signal associated with a signal frequency, the signal frequency being equal to a first predetermined frequency; receiving a current-sensing signal, the current-sensing signal being associated with a lamp current for the one or more cold-cathode fluorescent lamps in response to at least the first predetermined frequency; determining whether the current-sensing signal is larger than a first threshold in magnitude, the current-sensing signal being related to the first predetermined frequency; if the current-sensing signal related to the first predetermined frequency is determined to be larger than the first threshold in magnitude at anytime during a first period of time, changing the signal frequency from the first predetermined frequency to a second predetermined frequency, the second predetermined frequency being different from the first predetermined frequency; if the current-sensing signal related to the first predetermined frequency is determined to be smaller than the first threshold in magnitude throughout the first period of time,