Drive voltage generating device for liquid crystal display device

A drive voltage generating device for a liquid crystal display device, comprising:

• a voltage supply source which generates a prescribed voltage;
• first charge storing means for storing therein a charge supplied from said voltage supply source;
• second charge storing means, corresponding to said first charge storing means, for storing therein a charge transferred from said first charge storing means;
• an output terminal section including a plurality of output terminals which supply a voltage required for driving a liquid crystal display section, receiving said prescribed voltage from said second charge storing means through a predetermined pair of output terminals of said plurality of output terminals;
• and
• switching means for switching a connection between said voltage supply source and said first charge storing means and a connection between said first charge storing means and said second charge storing means so that a charge is supplied to said first charge storing means from said voltage supply source and that a charge stored in said first charge storing means is transferred to said second charge storing means, said switching means comprising two switching circuits, each being provided with a MOS type FET, the MOS type FET provided in one of said switching circuits not being driven in accordance with a switching of a parasitic diode generated by a back gate effect of the MOS type FET, the MOS type FET of the other switching circuit being driven in accordance with a switching of a parasitic diode generated by the back gate effect of the MOS type FET.