Velocity compensated waveforms for non-flashy updates of electrophoretic displays

Abstract

An electrophoretic display and a method for driving an electrophoretic display are disclosed for minimizing visible flicker during pixel transitions between black and white optical states. The method generates distinct transition waveforms for black-to-white and white-to-black transitions. Each waveform includes a plurality of full-velocity voltage segments followed by at least one reduced-velocity segment having a smaller voltage magnitude. For black-to-white transitions, the reduced-velocity segment occurs last; for white-to-black transitions, it occurs first. These tailored waveforms are applied to respective display pixels such that the transition velocity of a display pixel changing from black to white substantially matches that of a display pixel changing from white to black. This approach improves visual stability and reduces flicker artifacts during display updates.

Images