An electronic paper display device, a manufacturing method and a driving
method thereof are disclosed. Micro protrusion members are formed at
electrodes or at insulating layers. Consequently, the electrophoretic
particles are prevented from being securely attached to an upper or the
lower structure, and therefore, the quality of pictures is improved, and
the contrast ratio of the pictures is increased. The relative sizes and
the injection amounts of two kinds of electrophoretic particles are
changed such that the relative sizes and the injection amounts of the
electrophoretic particles are different from each other. Consequently,
the driving voltage is lowered by excessively electrifying the
electrophoretic particles of one kind. Protrusions are formed at the
corresponding electrode such that a relatively large electric field is
distributed around the electrode at which electrophoretic particles are
located in the initial stage of voltage application. Consequently, the
electrophoretic particles are easily separated from the electrode and
moved even at low driving voltage. As such, the voltage level of the
driving voltage pulse is lowered. Consequently, it is possible to further
increase the response speed of the driving devices and to lower the
internal voltage of the devices, thereby reducing the costs related to
the driving devices.