LIQUID CRYSTAL DISPLAY DRIVE CIRCUIT WHICH CAN DRIVE NORMALLY WHITE TYPE LIQUID CRYSTAL PANEL AND NORMALLY BLACK TYPE LIQUID CRYSTAL PANEL

摘要

A liquid crystal display driving circuit is provided with a first amplifier unit, a second amplifier unit, a first bias voltage source, a second bias voltage source, and a bias switch. The first amplifier unit receives a gamma corrected negative type image signal or a gamma corrected positive type image signal. The second amplifier unit receives the positive type image signal when the first amplifier unit receives the negative type image signal or the negative type image signal when the first amplifier unit receives the positive type image signal. The first bias voltage source generates a first bias voltage. The second bias voltage source generates a second bias voltage. The bias switch applies the first bias voltage to the first amplifier unit when the second bias voltage is applied to second amplifier unit or the second bias voltage to the first amplifier unit when the first bias voltage is applied to the second amplifier unit.