The disclosed embodiments provide a method and apparatus for visual
enhancement of liquid crystal displays. A microprocessor or embedded
microcontroller associated with visual enhancement circuit modules allows
a single inverter to control the intensity of illumination for an array
of multiple CCFLs. The microcontroller continuously senses the operating
currents of every lamp and adjusts for variations in illumination of
individual lamps by parallel switching of capacitance that ensures an
equal current is applied to each lamp. The microcontroller produces the
appropriate control signals and executes a digital servo control
algorithm to modify the currents for carrying out the luminance
adjustments.