| 摘要 |
PURPOSE:To drive a capacitive emitter at low d.c. power source voltage, and to reduce consumption power by connecting a drive circuit consisting of two coils and at least two switches, to an EL element, and by specifically controlling the ON/OFF operation of the switch. CONSTITUTION:A first switch means S1 is turned into ON condition from an OFF condition, and power is accumulated in a first inductor means L1, and the S1 is turned into OFF condition after a specific period of time passes, and the power of L1 is fed to and charged in a capacitive emitter EL. A process of accumulating the charged power of the emitter EL in a second inductor means L2, and a process of carrying out the same control for a second switch means S2 and for the circuit of the L2, to accumulate the charged power of the emitter EL in the L1, are also included. The two processes are repeated alternately or in partially the same time, by a controller. The power source voltage can be low, since part of the power accumulated in the emitter EL is returned to the L2, L1, and is re-used, and the power can thus be used effectively.
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