Patent ID: 7545358
Filing Date: 2009-06-09
Classification: G09G

Abstract:
1. An electro-optic display comprising: a layer of a bistable electro-optic medium; a plurality of pixel electrodes disposed on one side of the layer of electro-optic medium, at least one of the pixel electrodes being a sensor pixel electrode; at least one non-linear element associated with each pixel electrode; pixel drive means arranged to apply voltages to the pixel electrodes via the non-linear elements, the pixel drive means being arranged to apply a predetermined voltage to the input of the non-linear element associated with the at least one sensor pixel electrode; a common electrode on the opposed side of the layer of electro-optic medium from the pixel electrodes; and measuring means arranged to receive the predetermined voltage and the voltage on the at least one sensor pixel electrode and to determine the difference therebetween.