Electrophoretic display device and driving method thereof

摘要

An electrophoretic display device is provided, in which an image update period is constituted with a reset period including at least a stirring pulse for stirring electrophoretic particles and a compensation pulse for suppressing accumulation of the residual DC component and with a set period including a set pulse for applying, to intended pixels, a voltage of polarity for making transition to black or white for a prescribed amount of time according to a next image. The voltage waveforms for each display gradation are so designed that a period where a positive voltage is applied to a counter electrode and a period where a negative voltage is applied do not overlap with each other, and a compensation pulse is applied after the stirring pulse which sets all the pixels of the display unit to a white or black base state. Thereby, changes in the display state are not visually recognized.

主权项

1. An electrophoretic display device, comprising:
a display unit which comprises a first substrate, a second substrate, and electrophoretic particles inserted between the first substrate and the second substrate; and a voltage applying unit which updates a display state of the display unit from a current image to a next image by applying prescribed voltage waveforms constituted with a stirring pulse, a compensation pulse, and a set pulse to the electrophoretic particles, wherein the voltage applying unit first sets the display state to a state where the electrophoretic particles are migrated to either the first substrate or the second substrate by the stirring pulse according to polarity of the electrophoretic particles, then applies a voltage for suppressing a residual direct current component that may be generated after applying the set pulse without causing a change in the display state by the compensation pulse, and updates the image to the next image by the set pulse.