Methods and apparatus for visual

A portable manual device (A10), comprising a housing (A40), a panel (A12, A14) of visual seated within the housing (A40) and having a layer (A618) of light modulation with a plurality of shutters (A502) movable transversely formed on a substrate (504) transparent, an array (500) control coupled to the display panel to provide control over respective ones of the transversely movable shutters for moving said transversely movable shutters substantially in parallel to the transparent substrate (504) and transversely to a path of a light beam propagating to establish a level of illumination of respective pixels, a (A612) light source arranged inside the housing below the transparent substrate to direct light through the layer of light modulation, and a controller (A156) coupled with the matrix co ntrol to control mobile shutters for displaying an image, a power source disposed within the housing and coupled with (A612) and the light source controller (A156); wherein the controller (A156) has a plurality of operating modes of display and is adapted to provide a dynamic control of operational modes of display by determining the operating mode display necessary for executing a particular application, for energy saving purposes.