Patent ID: 9726898
Date: 2017-08-08
CPC Classifications: G02B,G02F,H04N

Claim:
1. A switchable autostereoscopic display device comprising: a display panel having an array of display pixels configured to produce a display, the display pixels being arranged in horizontal rows and vertical columns; and a lens arrangement configured to direct an output from different pixels to different spatial positions to enable a stereoscopic image to be viewed, the lens arrangement being in a plane parallel to the display panel; wherein the lens arrangement comprises an electrically switchable liquid crystal (LC) layer which defines a lens pattern or a lens replica pattern, wherein LC alignment of LC molecules of the LC layer is electrically switchable such that the lens arrangement is switchable between a 2D mode and a 3D mode, wherein in the 2D mode, the LC alignment is in a first direction substantially within the plane of the lens arrangement, and in the 3D mode the LC alignment is in a second direction rotated around a normal of the display panel to remain substantially within the plane of the lens arrangement, the first direction of the LC alignment being perpendicular to the second direction of the LC alignment and being within the plane of the lens arrangement parallel to the display panel, wherein the lens arrangement comprises switching electrodes that are perpendicular to a lens axis of the lens arrangement for generating an in-plane electric field along the lenses.