DRIVING CIRCUIT OF THIN FILM TRANSISTOR LIQUID CRYSTAL DISPLAY DEVICE, ESPECIALLY ADDING COMMON ELECTRODE VOLTAGE AS A VOLTAGE SOURCE

摘要

PURPOSE: A driving circuit of a thin film transistor liquid crystal display device is provided to utilize the low voltage driving amplifier for the high voltage driving by reducing the voltage difference between both ends of the gray level amplifier. CONSTITUTION: A driving circuit of a thin film transistor liquid crystal display device includes a plurality of first amplifiers(20) and a plurality of second amplifiers(21). The plurality of first amplifiers receives a first voltage higher than the common voltage and a plurality of first gray level voltages divided by the common voltage and outputs the first voltage and the first gray level voltages. The plurality of second amplifiers receives a second voltage lower than the common voltage and a plurality of second gray level voltages divided between the second voltages and outputs the second voltage and the second gray level voltages. The first voltage and the common voltage are supplied to the first amplifiers. And, the common voltage and the second voltage are supplied to the second amplifiers.