| 摘要 |
PURPOSE:To structure a driving circuit for the display element which uses no transformer and is low in power consumption and to simplify the circuit constitution. CONSTITUTION:An AC coupling composed of a capacitor C is provided on a path for supplying a base current to a transistor TR used as a switching element charges are applied to a capacitive display medium layer. The AC coupling, therefore, supplies the base current to the transistor TR used as the switching element. For the purpose, at least either of a current limiting resistor and a discharging diode is interposed between the base and the emitter of the transistor TR is series or in parallel to structure the low-power-consumption circuit which eliminates the need for a transformer.
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