Patent ID: 8212948

Claim:
A display device configured to provide two-dimensional and three-dimensional perception, comprising: a display panel displaying light, a backlight arrangement emitting light towards the display panel, and control circuitry controlling the display panel, where said backlight arrangement comprises: a light source arrangement comprising a first light source and a second light source; an optically clear lightguide having: a first side face for coupling into the lightguide light from the first light source traveling in a first direction within the lightguide, a second side face, opposite the first the side face, for coupling into the lightguide light from the second light source traveling in a second direction, opposite the first direction within the lightguide; an exit surface via which light coupled into the lightguide is coupled out of the lightguide; and a relief-structured polarization-selective beam-splitting interface configured to split-off from the light traveling in the first direction, a first beam of first polarization and redirect said first beam to have said first beam exit the exit surface at a first angle and to split-off from the light traveling in the second direction, a second beam of light of first polarization and redirect said second beam to have said second beam exit the exit surface at a second angle different from the first angle; and where the control circuitry is configured to provide the three-dimensional perception using the first and the second beam.