DRIVING CIRCUIT OF LIQUID CRYSTAL DISPLAY, ESPECIALLY FORMING AN OUTPUT BUFFER OF A DRIVING CIRCUIT BY AN NAND GATE AND AN ANALOG AMP

摘要

PURPOSE: A driving circuit of a liquid crystal display with an improved integrity is provided to improve integrity of the driving circuit by stably transmitting an analog output signal of the driving circuit to a signal line. CONSTITUTION: A latch circuit includes a data latch(41), a shift register(40), and a line latch(42), and it latches digital pixel data. A digital analog converter(43) converts an output of the latch circuit into an analog image signal. An analog amplifier(55) amplifies the analog image signal converted by the digital analog converter. The analog amplifier is composed of a NAND gate, a capacitor, and a switch. The capacitor is connected to an input terminal of the NAND gate. The switch connects the input terminal to an output terminal of the NAND gate. The data latch latches digital pixel data. The shift register sequentially generates a latch enable signal. The line latch sequentially stores the digital pixel data.