ELECTROPHORETIC DISPLAY DEVICES

摘要

An electrophoretic display device comprises an array (70) of rows and columns of display pixels and a backlight (72). The backlight (72) comprises an array of independently drivable backlight portions, each backlight portion being associated with a sub-array of a plurality of display pixels. The use of independently controlled backlight portions enables them to be driven to a brightness and/or color which takes account of the local pixel values. This can be used to increase the proportion of pixels driven fully transmissive or fully black. It also enables the power consumption of the backlight to be reduced, as the individual portions can be driven off or to levels selected in dependence on the local pixel drive values.