Multi-view display device

Abstract

The invention provides a multi-view display in which a view forming arrangement comprises a first view forming structure spaced by a first distance from the display panel for providing multiple views across a first direction, and a second view forming arrangement spaced by a second distance from the display panel for providing multiple views across a second perpendicular direction. The angular width of the multiple views in the two directions can thus be independently defined.

1 . A multi-view display, comprising:
 a display panel; and   a view forming arrangement formed over the display panel for providing a multi-view function,   wherein the view forming arrangement comprises a first view forming structure spaced by a first distance (t1) from the display panel for providing multiple views across a first direction, and a second view forming structure spaced by a second distance (t2) from the first view forming structure for providing multiple views across a second perpendicular direction,   characterised in that the angular width of the multiple views in the two directions is independently defined with the angular widths of the multiple views in the two directions in the ratio of smaller angular width to larger angular width of 1:n where n<2 wherein the first view forming structure closest to the display panel is made of material with a first refractive index, and the second view forming structure is made of material with a lower refractive index.   
     
     
         2 . A display as claimed in  claim 1 , wherein the view forming arrangement comprises a first spacer layer over the display pane, a first lenticular lens array over the first spacer layer, a second spacer layer over the first lenticular lens array and a second lenticular lens array over the second spacer layer. 
     
     
         3 . A display as claimed in  claim 2 , wherein the first and second lenticular lens arrays define convex lens interfaces, with respect to the direction of light through the view forming arrangement from the display panel. 
     
     
         4 . A display as claimed in  claim 3 , wherein the first spacer layer, the first lenticular lens array and the second lenticular lens array are glass or plastic, and the second spacer layer is air. 
     
     
         5 . A display as claimed in  claim 2 , wherein the first lenticular lens array defines convex lens interfaces, and the second lenticular lens array defines concave lens interfaces, with respect to the direction of light through the view forming arrangement from the display panel. 
     
     
         6 . A display as claimed in  claim 5 , wherein the first spacer layer, the first lenticular lens array and the second lenticular lens array are glass or plastic with a first refractive index, and the second spacer layer is glass or plastic with a second, lower refractive index. 
     
     
         7 . A display as claimed in  claim 1 , wherein the view forming arrangement comprises a first spacer layer over the display panel, a first barrier layer over the first spacer layer, a second spacer layer over the first barrier layer and a second barrier layer over the second spacer layer. 
     
     
         8 . A hand held device comprising a display as claimed in  claim 1 .