Circuit for driving a liquid crystal display and method for driving the same circuit

A drive circuit for driving an active matrix type liquid crystal display, comprising a video signal generating block, a timing control block, coupled to the video signal generation block, for supplying timing signals to various parts in the liquid crystal display, and a panel control pulse generation block, coupled to the timing control block, for supplying control pulses for scanning in the liquid crystal display,

• wherein the video signal generating block for generating a video signal to be supplied to the liquid crystal display, includes, for each of liquid crystal display systems for R (red), G (green) and B (blue), an ADC circuit for converting an analog signal from a signal source of a video signal for a display, into a digital signal, two memories, coupled to the ADC circuit, each having a capacity which can hold signals of one line of the liquid crystal display, a V-T compensation circuits, coupled to the two memories, for compensating a non-linearity of a transmission light strength to an input voltage of the liquid crystal display, a polarity inverting circuit, coupled to the V-T compensation circuit, for an AC driving of liquid crystal pixels in the liquid crystal display, a DAC circuit, coupled to the polarity inverting circuit, for converting the digital signal outputted from said polarity inverting circuit, into an analog signal, and an output selection circuit, coupled to the DAC circuit, for switching an output to be applied to the liquid crystal display, so as to supply the switched output to the liquid crystal display, said output selection circuit being configured to display the analog signal outputted from said DAC circuit, during a period which is a half of one horizontal period of said video signal, and to precharge the liquid crystal display during a latter half of the horizontal period.