Patent ID: 8681414

Claim:
An electrophoretic display device comprising: a lower substrate having a plurality of pixel electrodes formed on the lower substrate and having partition walls formed on the lower substrate surrounding the pixel electrodes, the pixel electrodes and partition walls defining a plurality of sub-pixels; an upper substrate bonded with the lower substrate, the upper substrate having a common electrode formed thereon with an encapsulation layer formed on an area of the common electrode corresponding to the plurality of the sub-pixels; an electrophoretic dispersion liquid comprising a plurality of charged particles colored to display predetermined colors, the electrophoretic dispersion liquid injected into the plurality of the sub-pixels defined by the pixel electrodes and the partition walls; and an interlayer formed between the encapsulation layer and the electrophoretic dispersion liquid, wherein the interlayer is formed to prevent the electrophoretic dispersion liquid from contacting the encapsulation layer formed on the upper substrate directly, wherein the interlayer is formed of an insulating organic material, wherein each of the partition walls, the encapsulation layer and the interlayer has the non polarity properties.