Patent ID: 9563269
Date: 2017-02-07
CPC Classifications: G02B,G02F,G06F

Claim:
1. A display comprising: an optical waveguide; a light-extraction layer arranged on or within the waveguide; an injection optic configured to vary and control an elevation angle at which light is injected into the waveguide, the elevation angle influencing a reflection angle through which the light internally reflects from opposing front and back faces of the waveguide; and a plurality of holograms arranged in the light-extraction layer in different orientations relative to the front and back faces of the waveguide, each hologram being configured to release a portion of the light from the waveguide in a different, predetermined direction when such portion is received at a different, predetermined excitation angle, the orientation of each hologram being such that the reflection angle determines whether the portion is received at the predetermined excitation angle.