Patent ID: 8330750

Claim:
A liquid crystal drive device comprising: a gate driver applying a gate voltage to a liquid crystal display panel of an active matrix type; a source driver applying a source voltage to the liquid crystal display panel; a common driver applying a common voltage to the liquid crystal display panel; and a boosting circuit generating a desired boosted voltage from a supply voltage, wherein, on application of the source voltage and high-level transition of the common voltage, at least one of the source driver and the common driver performs voltage application using the supply voltage prior to voltage application using the boosted voltage, wherein the source driver comprises: a source amplifier generating a data voltage corresponding to a halftone value of input data by use of the boosted voltage; a buffer amplifier generating a predetermined precharge voltage by use of the supply voltage; and a selector selectively applying one of the data voltage and the precharge voltage to the liquid crystal display panel, wherein, on application of the source voltage, the selector applies the precharge voltage, for a predetermined period, prior to application of the data voltage.