| 摘要 |
PROBLEM TO BE SOLVED: To enable the fast rising and falling of driving signals of a piezoelectric element as an actuator arranged in an inkjet head. SOLUTION: A first DC/DC converter 5 and a second DC/DC converter 6 are connected to both of the ends of the piezoelectric element 3, relative to the driving signal to the piezoelectric element 3, the inclination and the amplitude width of the output wave form 1 of the first DC/DC converter 5 become 1/2 of the inclination and the amplitude width of the rising and falling of the driving signal, and the differential voltage of the output wave form of the second DC/DC converter 6 becomes the differential voltage inverting the output wave form the first DC/DC converter 5, and the difference between the intermediate potential Vm1 of the output wave form 1 of the first DC/DC converter 5 and the intermediate potential Vm2 of the output wave form 2 of the second DC/DC converter6 is set to the intermediate potential Vm of the driving signal. COPYRIGHT: (C)2007,JPO&INPIT
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