Patent Number: 6,310,593

Title: Liquid crystal driving circuit

Abstract: 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.

Inventors: Nakao; Tomoaki (Yamatokoriyama, JP)

Assignee: Sharp Kabushiki Kaisha

International Classification: G09G 3/36 (20060101); G09G 003/36 ()

Expiration Date: 10/30/2018