The disclosed embodiments provide a method and apparatus for optimizing
power efficiency in liquid crystal displays. A microprocessor or embedded
microcontroller associated with circuit control modules eliminates
redundancy by allowing a single inverter to equalize the intensity of
illumination for an array of multiple CCFLs. The microcontroller
optimizes power management by continuously sensing the operating currents
of every lamp and automatically 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.