Patent ID: 8982041
Filing Date: 2015-03-17
Classification: G02F,G09G

Abstract:
1. A drive method for a display device, the display device comprising a plurality of pixels, each pixel comprising: a first drive electrode that is associated with a first region of the pixel; a viewing electrode that is associated with a second region of the pixel; a second drive electrode that is: intermediate of the first drive electrode and the viewing electrode; at the boundary between the first and second regions of the pixel; and movable charged particles; and wherein the optical appearance of each pixel is altered by controlling the number of charged particles within the vicinity of the viewing electrode, under the influence of control signals applied to the first and second drive electrodes and the viewing electrode, wherein the method for each pixel comprises: in a pre-addressing stage, applying control signals to the pixel to move the particles towards the second drive electrode at the boundary between the first and second regions; and then in an addressing stage, applying control signals to the pixel to move the particles to the first region and to the second region, the respective numbers of particles moved to the first and second regions being in dependence on the desired optical appearance of the pixel; in a post-addressing stage, subsequent to the addressing stage, applying control signals to the pixel such that the particles in the first region move to the vicinity of the first drive electrode and that the particles in the second region move to the vicinity of the viewing electrode; wherein controls signals for the pre-addressing stage are applied to at least one of the plurality of pixels and controls signals for the addressing stage are applied to at least one other of the plurality of pixels, and wherein the control signals for the pre-addressing stage and the control signals for the addressing stage are applied simultaneously.