Patent ID: 8159739
Filing Date: 2012-04-17
Classification: G02B,H04N

Abstract:
1. A display apparatus comprising: a spatial light modulator; optical elements in series with the spatial light modulator and being switchable to provide: a first parallax element being a parallax barrier capable of directing light output from the display apparatus to form a first plurality of viewing windows; and a second parallax element capable of directing light output from the display apparatus to form a second plurality of viewing windows, wherein the first and second plurality of viewing windows are respectively arranged in two perpendicular orientations, the optical elements being switchable to operate in a first mode in which the first and second parallax elements have substantially no directional effect on the light output from the display apparatus, a second mode in which the first parallax element directs light output from the display apparatus into the first plurality of viewing windows and the second optical element has substantially no directional effect on the light output from the display apparatus and a third mode in which the first parallax element has substantially no directional effect on the light output from the display apparatus and the second optical element directs light output from the display apparatus into the second plurality of viewing windows.