Patent ID: 9201270
Filing Date: 2015-12-01
Classification: G02B,G02F

Abstract:
1. A directional backlight, comprising: a directional backplane comprising a slab of transparent material configured to guide a plurality of input planar lightbeams, the directional backplane having a plurality of directional pixels configured to scatter a portion of the guided input planar lightbeams out of a surface of the transparent material slab into a plurality of directional lightbeams corresponding to directions of different views of a three-dimensional (3D) image, each directional lightbeam having a direction and angular spread controlled by characteristics of a directional pixel in the plurality of directional pixels; and a modulation layer having a plurality of modulators configured to modulate the plurality of directional lightbeams, wherein a directional pixel of the plurality of directional pixels comprises a patterned grating one or both of in and on the surface of the transparent material slab.