Patent ID: 7233113

Claim:
A power supply system for liquid crystal monitors, characterized in that it includes at least a first DC/AC converter (FBS, HBS) operating at predetermined frequency and duty-cycles and being fed by at least a second DC/DC converter (FC, SC) which regulates the circuit voltage to feed a plurality of fluorescent lamps (L, L 1 , LN) in the monitor through a wiring harness which transmits at least an output sinusoidal signal (SG 1 , SG 2 , SG 3 ) from said first DC/AC converter (FBS, HBS) to the primary windings of a plurality of parallel connected piezoelectric transformers (PT, PTl, PT 2 , PTN, PT 2 N), which are connected with the fluorescent lamps (L, L 1 , LN,).