Patent ID: 8537293

Claim:
A switchable autostereoscopic display device having 2D and 3D modes of operation, comprising: a display panel ( 60 ) having an array of display pixels ( 5 ) for producing a display, the display pixels being arranged in rows and columns; and a lens arrangement ( 72 ) comprising a lens element arrangement ( 72 ) and a replica structure ( 70 ), one of which is formed of a blue phase LC material and the other of which is formed of a non-switchable isotropic material, the lens arrangement being for directing the output from different pixels to different spatial positions to enable an autostereoscopic image to be viewed, wherein the device further comprises a controller adapted to switch the blue phase material to an isotropic state for the 2D mode and to a birefringent state for the 3D mode, and wherein in the 2D mode, the refractive index of the blue phase material matches the refractive index of the non-switchable isotropic material.