US Patent 10133057 Electrowetting element with different dielectric layers

An electrowetting element comprising a first fluid and a second fluid immiscible with the first fluid. A support plate comprises an electrode, a support plate surface and a substrate. An inorganic dielectric layer is located between the substrate and the support plate surface and is transmissive to light in the visible spectrum. An organic dielectric layer is located between the substrate and the support plate surface and is transmissive to visible light. The inorganic dielectric layer has an inorganic dielectric layer deformation behavior and the organic dielectric layer has an organic dielectric layer deformation behavior substantially equal to the inorganic dielectric layer deformation behavior.