| 摘要 |
A liquid crystal driving circuit includes: a charge capacitor and a distribution capacitor, each having a first electrode and a second electrode, respective first electrodes of the charge capacitor and the distribution capacitor being connected to each other; a first switch for connecting and disconnecting respective second electrodes of the charge capacitor and the distribution capacitor; a select switch for selecting application of a first reference voltage and a second reference voltage with respect to the second electrode of the charge capacitor by connection or disconnection; an operational amplifier for outputting an analog signal for multi-tone display in accordance with an amount of charge of the distribution capacitor and the second reference voltage; and a controller for alternately controlling the first switch and the select switch in accordance with a digital signal for multi-tone display.
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