Bistable chiral nematic liquid crystal display and method of driving the same

摘要

A cholesteric liquid crystal display has pixel address circuits ( 84 ) with an input ( 12 ) for receiving a data signal and a plurality of outputs, wherein each output is for applying a pixel drive signal to a respective portion of the liquid crystal material ( 20 ), and wherein the pixel drive signal for each output is independently switchable by the pixel address circuit to each output. This provides spatially-separated sub-pixels, and a number of the sub-pixels can be addressed in order to provide a grey scale output for each pixel. Each pixel drive signal can however be a two-level digital signal.