An electrophoretic display panel(1), comprises a plurality of picture elements(2); and drive means(100), for providing overreset pulses prior to application of grey scale pulses. The display panel comprises two or more interspersed groups of display elements. Each group is supplied with its own scheme(I, II) of overreset potential differences, the application schemes for overreset potential differences differs from group to group in such manner that the time at which an overreset condition is maintained differs between said groups for at least some transitions. |