of the single sheet piezoelectric transformers 201 a are jointly connected to the one end of the inductor 60 a and the secondary electrodes 22 of the single sheet piezoelectric transformers 201 a are jointly connected to the input end high voltage end of the ccfl 10 a to actuate and ignite the ccfl 10 a in a cooperative manner of course to drive the multiple single sheet piezoelectric transformers 201 a the inductor 60 a and the power switch 50 a must have a matching power as the ccfl 10 have many different specifications such as long tube or short tube and the actuating circuit also has many types such as the long tube is ignited by a push pull circuit and the number of loads driven by each element also is different hence the circuit configuration could vary but the basic structure shown in fig1 still is applied the piezoelectric transformer of the invention is adaptable to these variations more embodiments are discussed below refer to fig2 through 7 for the circuit topologic diagrams of various embodiments that employ a single power supply unit 30 and a single pwm control unit 40 to control a plurality of loads namely ccfls 10 a 10 d the circuit of the power switch inductor and piezoelectric transformer unit may have different designs as follow fig2 shows ccfls 10 a 10 d are driven respectively by a matching piezoelectric transformer unit 20 a 20 d and inductor 60 a 60 d one power switch 50 a or 50 b respectively drives two or more inductors 60 a and 60 b and 60 c and 60.