Patent ID: 8068187

Claim:
A stereoscopic 3D liquid crystal display apparatus, comprising: a liquid crystal display panel; a directional backlight positioned to provide light to the liquid crystal display panel, the directional backlight comprising: a light guide having a first side, a second side opposite the first side, a first surface extending between the first and second sides, and a second surface opposite the first surface, wherein the first surface substantially re-directs light and the second surface substantially transmits light to the liquid crystal display panel; a first light source disposed along the first side of the light guide; and a second light source disposed along the second side the light guide; a synchronization driving element electrically coupled to the first and second light sources and the synchronization driving element synchronizes turning each of the first or second light sources on or off in an alternating order between the first and second sides; and a double sided prism film disposed between the liquid crystal display panel and the directional backlight, wherein the prism film comprises a first surface having a plurality of cylindrical lenses adjacent the liquid crystal display panel and a second surface, opposite the first surface, having a plurality of non-contiguous prisms adjacent the directional backlight, wherein the directional backlight and the double sided prism film provide for left eye images and right eye images, and the left eye images and the right eye images together provide a viewer with 3D images by a directionality of the left eye images and the right eye images transmitted to the liquid crystal display panel, wherein a spacing of the non-contiguous prisms is selected to maintain the directionality of the left eye images and the right eye images in order to provide the 3D images.