Patent ID: 8427753

Claim:
A method of utilizing a fluid mixture for an electrowetting display device, comprising: providing a display device having: a first surface, a switchable electric field, and the fluid mixture; wherein the fluid mixture comprises an electrically inducible liquid and an electrically inert fluid, being on or close to the first surface, the electrically inducible liquid having a surface tension that is sensitive to the strength of the switchable electric field, the electrically inert fluid having a surface tension that is not or is only marginally sensitive to the switchable electric field, the electrically inducible liquid forming a bi- or multiphasic mixture with the electrically inert fluid of the fluid mixture, and at least the electrically inducible liquid having a freezing point below and/or a boiling point above water, wherein the electrically inducible liquid is derived from the group comprising the substances propylene carbonate, diethylcarbonate, diacetone alcohol, cyclohexanone, butylacetate, propylacetate and ethylhexanol; and wherein the electrically inducible liquid and/or the electrically inert fluid is stained; and changing the strength of the switchable electric field so as to change the surface tension of the electrically inducible liquid.