Patent ID: 7956820
Filing Date: 2011-06-07
Classification: G02B,G02F,H04N

Abstract:
1. A display device comprising an outer display stacked with an inner display, said display device being arranged to be operated in a first, multiple view display mode (C) and a second, single view display mode (B), which display device is characterized in that said outer display is an electrophoretic display that is controllable to enable said display device to be operated in the first and the second display mode, wherein said first and second display modes are achieved by means of controlling a potential difference across picture elements in said outer display, which picture elements are operable in at least one opaque state and one transparent state, said first display mode being attained by arranging the inner display in an on-state and by arranging at least one of the picture elements in the outer display in the transparent state while the other picture elements in the outer display are in said at least one opaque state, and said second display mode being attained by arranging the inner display in the on-state and by arranging the picture elements of the outer display in the transparent state, and wherein said outer display further is arranged to be controllable to enable said display device to be operated in a third, low-power, single view mode (A), in which third mode the display device is consuming less power than in said second mode (B), said third mode being achieved by means of controlling a potential difference across picture elements in said electrophoretic display, the picture elements being operable in at least one further opaque state, said third display mode being attained by arranging the inner display in an off-state and by arranging the picture elements of the outer display in any one of the opaque states.