1. An autostereoscopic display device comprising: a display ( 103 ) having an array of display pixels ( 105 ) for producing a display, wherein the display pixels are arranged in rows and columns; a view forming arrangement for projecting a plurality of views each of which in a different direction, the view forming arrangement comprising elongate elements which have a long axis which is slanted at an angle α to the column pixel direction, and the elongate elements have a pitch of P times the width between pixels of the same colour in different columns, and wherein the pitch P is selected to be: 
 P= 0.5· k ·(1+ S 2 ) in which S=tan α, and k is a positive integer.