Patent ID: 8514213

Claim:
A display device comprising: a plurality of transistors, each comprising a source terminal, a gate terminal, and a drain terminal; a column driver connected to said source terminals for providing column voltages (V col ); a row driver connected to said gate terminals for providing a row select voltage; a plurality of pixels, each having a pixel state that is driven by a driving voltage differential (V Eink ) between a pixel voltage (V px ) applied to a pixel terminal and a common voltage (V CE ) applied to a common terminal, said pixel terminal connected to a drain terminal of a corresponding transistor; a common driver for providing a variable common voltage (V CE ) to the common terminals; and a controller controlling the operation of the column driver, the row driver, and the common driver for driving said plurality of pixels, said controller arranged to provide a control sequence of: a scan line driving phase during which the column driver is controlled to provide a plurality of driving column voltages (V col — PD ) to the source terminals and the row driver is controlled to provide scanning row select voltages to the gate terminals, for sequentially updating each pixel having an initial pixel state with said plurality of driving column voltages (V col — PD ) to attain, for each initial pixel state, an initial common pixel state; and a common driving phase during which the column driver is controlled to provide a uniform column voltage (V col — CD ) to the source terminals for updating said plurality of pixel voltages (V px ) with a uniform column voltage (V col — CD ) and wherein the row driver is controlled to provide row select voltages with a gate voltage swing (ΔV gate ) that is lower during the common driving phase than during the scan line driving phase or wherein the row driver is controlled to provide a uniform row select voltage (V gate — CD ) during multiple scan periods for keeping the transistors open in a conducting state, thereby maintaining said uniform column voltage (V col — CD ) on the pixel terminals so as to drive each pixel from a respective initial common pixel state to a respective final common state, wherein the common driver is controlled not to change the common voltage when one of the rows is selected.