Patent ID: 7675502

Claim:
An electrophoretic display device, comprising a display region between substrates, at least one of which is transparent, the display region including a multiplicity of pixels, wherein one or more of the pixels comprises three subpixels, the three subpixels being comprised of individual reservoirs that each contain a display medium comprised of one or more sets of colored particles in a dielectric fluid, the display medium including two different colors therein so that the subpixel is capable of exhibiting each of the two different colors, and wherein each of the three subpixels of a single pixel of the one or more pixels includes a display medium having a different combination of two colors from the display mediums of all of the other of the three subpixels of the single pixel, wherein the two different colors are selected from a group of colors consisting of red, green and blue, and wherein at least two of the subpixels of the single pixel are capable of displaying a same color, and wherein one or more of the pixels further comprises a fourth subpixel, wherein the fourth subpixel includes a display medium comprised of black and white colors.