Patent ID: 8416488

Claim:
A display device comprising picture elements, which are constituted by electrowetting elements having at least one first fluid and a second fluid immiscible with each other within a space between a first support plate and a second support plate, the second fluid being electro-conductive or polar, whereby the first fluid in each element is at an inner side of the first support plate confined by element walls, and the second fluid is shared by a plurality of picture elements, wherein a preventer for preventing first fluid portions from being expelled from its confinement when forces other than electrowetting forces are exerted on this fluid is arranged at an inner side of the second support plate and is constituted by an array of protruding elements having their base on the second support plate, wherein the array of protruding elements has a hydrophilic surface and a height smaller than the distance between the first support plate and the second support plate.