Patent ID: 7425970

Claim:
A display unit comprising: a frame buffer memory operable to store image information; a first plurality of row drivers and column drivers which depend on said frame buffer memory; a passive matrix of independently controllable pixels comprising rows and columns of discrete pixels, said passive matrix operable to generate an image in response to electrical signals driven from said first plurality of row drivers and column drivers solely coupled to pixels of said passive matrix, wherein said image is representative of said image information of said frame buffer memory; a second plurality of row drivers and column drivers which operate independent of said frame buffer memory; and a border surrounding said passive matrix and comprising a fixed number of pixels arranged in rows and columns, wherein said border includes a fixed width surrounding said passive matrix, wherein each pixel of said border is uniformly controllable between an on state and an off state by a threshold signal applied to each pixel of said border, wherein said threshold signal is based on voltages driven by said second plurality of row drivers and column drivers solely coupled to said pixels of said border.