Directional backlight with a modulation layer

摘要

A directional backlight is disclosed. The directional backlight has a directional backplane that has a plurality of directional pixels to scatter a plurality of input planar lightbeams into a plurality of directional lightbeams. Each directional lightbeam has a direction and angular spread controlled by characteristics of a directional pixel in the plurality of directional pixels. A modulation layer having a plurality of modulators modulates the plurality of directional lightbeams. The directional backlight can be used to generate a 3D image with multiple views by specifying the characteristics of the directional pixels in the directional backplane.

主权项

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.