Patent ID: 7639210

Claim:
A multi-depth display apparatus for displaying images at at least two different perceived depths, the display apparatus comprising a display panel comprising a plurality of pixels arranged to display at least a first image in a first range of directions and a second image in a second range of directions; and a direction changing layer arranged so that light forming said first and second images enters the direction changing layer and then exits the direction changing layer, wherein: in relation to the light forming said first image, the direction of the light is changed by the direction changing layer so that the light exiting the direction changing layer is changed in direction by a first angle relative to the light entering the direction changing layer; and in relation to the light forming said second image, the direction of the light is changed by the direction changing layer so that the light exiting the direction changing layer is changed in direction by a second angle relative to the light entering the direction changing layer; and wherein said first and second angles are different; so as to create a difference in perceived depth between said first and second images when viewed by a user.