P-56: Automatic Delay Compensation for a CCFL Backlight System

Recently, a single phase driving method has been adopted for driving CCFL lamps to provide a low cost implementation. However, high voltage driving signals are coupled to pixel electrodes through parasitic capacitance between the lamps and panel electrodes, generating artifacts in the display. This paper describes the analysis results of this phenomenon and the proposed automatic delay compensation scheme eliminates the artifacts caused by the coupling effect.