The present invention relates to an improved EPD which comprises both the
traditional up/down switching and the in-plane switching modes. In other
words, the improved EPD has dual switching modes. The monochrome EPDs of
the present invention are capable of displaying highlight color of choice
which is different from the text. For example, white background, blue
text, and red highlight can be shown in any selected areas of the
display. Furthermore, the full color EPDs of the present invention are
capable of displaying high contrast images of high color saturation. Both
high quality black and white states are possible in the full color
displays of the present invention. The EPDs of the present invention do
not need complex circuitry design, and are compatible with low cost and
high yield roll-to-roll manufacturing processes.