Patent ID: 8164552

Claim:
A display system built up of at least one display cell comprising an assembly which has at least a first electrode and a second electrode and in which there are mutually non-miscible first and second liquids filled, wherein either one of said first electrode and said second electrode is electrically insulated from said first and second liquids, said first liquid has electrical conductivity or polarity, and voltage is applied to one or both of said first electrode and said second electrode, whereby said first liquid and said second liquid vary in position to produce a display, characterized in that: said assembly comprises a set of substrates, at least one of which is transparent, a wall portion for holding said set of substrates in opposition to one another in such a way as to define a liquid confining space, a 1 st -A electrode and a 1 st -B electrode that are located on a side of one substrate that faces said liquid confining space in an electrically independent way, an insulating layer for covering said 1 st -A electrode and said 1 st -B electrode, an intermediate partition located at a boundary site between said 1 st -A electrode and said l st -B electrode, and said second electrode is located on another substrate that faces said liquid confining space, wherein said 1 st -A electrode and said 1 st -B electrode are electrically insulated from said first liquid and said second liquid; at a voltage applied between said 1 st -A electrode and said second electrode or between said 1 st -B electrode and said second electrode, said second liquid goes over said intermediate partition in such a way as to be able to move between on said 1 st -A electrode and on said l st -B electrode; said intermediate partition is a liquid retainer means which, even after the applied voltage is shut off at a position where said first liquid and said second liquid have moved to, permits said first liquid and said second liquid to be held at the position where they have moved to, producing memory capability; and there is a specific relation: θ 1 <θ 2 ≦θ 3 where θ 1 is an angle of contact with a water droplet indicative of hydrophilicity of a site of said wall portion exposed in said assembly, θ 2 is an angle of contact with a water droplet indicative of hydrophilicity of said intermediate partition, and θ 3 is an angle of contact with a water droplet indicative of hydrophilicity of said insulating layer.