Display device.

摘要

This invention provides a driver for driving a liquid crystal panel by a multi line simultaneous selection addressing method which only needs to withstand a low voltage. A display device includes a liquid crystal panel 1, a controller 2, a common driver 3 and a segment driver 4. The controller 2, as well as producing an orthonormal signal indicating a set of orthonormal functions, also produces a sum of products signals in accordance with a result of performing a sum of product calculation with a set of othonormal functions and a set of pixel data. The common driver 3 applies a row driving waveform having a predetermined voltage level (+Vr, Vo, -Vr) to the row electrodes of the liquid crystal panel 1 by group sequential scanning at selected intervals in accordance with the orthonormal signal. The segment driver 4 applies a column driving waveform having a predetermined voltage level to the column electrodes of the liquid crystal panel 1 in synchronising with the sum of products signals. While the common driver 3 is supplied by a high voltage power supply (+VLC, -VLC) and outputs a relatively high voltage level line driving waveform, the segment driver 4 is supplied by a low voltage power supply (VDD, GND) and outputs a relatively low voltage level row driving waveform. <IMAGE>