A bistable electro-optic display has a plurality of pixels, each of which is capable of displaying at least three gray levels. The display is driven by a method comprising: storing a look-up table containing data representing the impulses necessary to convert an initial gray level to a final gray level;...http://www.google.com/patents/US7312794?utm_source=gb-gplus-sharePatent US7312794 - Methods for driving electro-optic displays, and apparatus for use therein
