Liquid crystal display driver circuitry

In a driving device of an active matrix type liquid crystal display unit including a liquid crystal display panel, a scan driver (7), and a data driver (8), a data voltage controlling apparatus is provided to achieve digital multiple gray-scale levels with little flickering. The data voltage controlling apparatus supplies the data driver (8) with a combination of two different voltages selected from a plurality of predetermined digital data voltages (V1 to V4). The combination of two different data voltages are, for example, a combination of different waveforms, a combination of negative level and positive level, and a combination of two different voltages having at least a voltage difference. Further, a division of T-V characteristics and an exchange of data voltages are carried out to reduce the flickering.