Scanning apparatus for an electrophoretic matrix display panel

A scanning apparatus for an electrophoretic matrix display panel having opposed spaced X-line and Y-line electrodes and having a multiplicity of display cells located between said X-line and Y-line electrodes, said scanning apparatus comprising an X-line electrode driving circuit adapted to be coupled to said X-line electrodes and having a set of X-line drivers for supplying an X-erasing pulse and a selecting pulse with a pause interval to an X-line electrode, said pause interval being supplied before said selecting pulse is supplied and after said X-erasing pulse is supplied so as to stop the supply of any voltage to said X-line electrode during said pause interval;

• a Y-line electrode driving circuit adapted to be coupled to said Y-line electrodes and having a set of Y-line drivers for supplying a Y-erasing pulse and a data pulse with a pause interval to a Y-line electrode, said Y-erasing pulse, pause interval and data pulse supplied to said Y-line electrode being synchronized with said X-erasing pulse, pause interval and selecting pulse supplied to said X-line electrode, respectively, so as to stop the supply of any voltage to the display cell at the intersection of said X-line electrode and said Y-line electrode during said pause interval, the voltage difference between said selecting pulse and said data pulse being applied as an information pulse to said display cell;
• and an information signal supply means coupled to said X-line and Y-line electrode driving circuits.