Patent ID: 8213072

Claim:
An electrofluidic display device, comprising: a first structure layer, comprising: a first substrate; a trench structure layer, disposed on the first substrate and having at least one trench correspondingly surrounding an indent groove of a second substrate; a first electrode layer, disposed on the first substrate, and being conformal with the at least one trench; and a first hydrophobic layer, disposed on the first electrode layer, and being conformal with the at least one trench; a second structure layer, comprising: the second substrate, located at one side of the first substrate with a gap; a groove structure layer, disposed on the second substrate, wherein the groove structure layer has the indent groove surrounded by the trench of the first substrate; a second electrode layer, disposed on the groove structure layer; and a second hydrophobic layer, disposed on the second electrode layer; polar fluid, disposed in the indent groove and contacting the first hydrophobic layer, and non-polar fluid, disposed in the gap between the first substrate and the second substrate.