LIGHT REDIRECTION HOLOGRAM FOR REFLECTIVE DISPLAYS

摘要

This disclosure provides an apparatus and method for enhancing the brightness and/or contrast ratio of display devices. In one aspect, the display devices can include a light redirector (403). The light redirector (403) includes a light receiving surface, and a holographic layer including a plurality of transmissive holographic features (403a, 403b) that can receive near-collimated light at non-normal angles with respect to a normal to the light receiving surface and redirect and diffuse the received light along a direction that is within +/- 20 degrees with respect to the surface normal towards a side opposite the light receiving surface.