a display device comprising an array of encapsulated pixels . the encapsulating pixel includes an optical element which is altered from a first optical state to a second optical state upon when a potential difference is generated across it . the optical element is in contact with two electrodes which are connected to a pixel driver for generating the potential difference . the encapsulated pixel is hermetically sealed from the environment by a sealing layer and the driver receives power wirelessly via an inductive power transmission system .