Patent ID: 8179365

Claim:
An electrophoretic display device, comprising: a first substrate comprising a plurality of pixel areas, each pixel area of the plurality of pixel areas including a plurality of sub-pixel areas, the plurality of pixel areas including a first pixel area, the first pixel area including a first sub-pixel area, a second sub-pixel area, a third sub-pixel area, and fourth sub-pixel area for displaying a first color, a second color, a third color, and a fourth color, respectively, wherein the first, second, and third sub-pixel areas have the same size, and the fourth sub-pixel area is of lesser area than each of the first, second, and third sub-pixel areas; sub-pixel electrodes formed in respective ones of the plurality of sub-pixel areas of the first substrate, the sub-pixel electrodes including a first sub-pixel electrode; and a plurality of differently colored sub-color filters corresponding to the sub-pixel electrodes and formed in a second substrate facing the first substrate, the plurality of differently colored sub-color filters including a first sub-color filter, where an area of the first sub-color filter is substantially less than an area of the first sub-pixel electrode.