LIGHT REDIRECTION HOLOGRAM FOR REFLECTIVE DISPLAYS
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United States of America Patent
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May 14, 2015
app pub date -
May 8, 2014
filing date -
Nov 8, 2013
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Abstract
This disclosure provides systems, methods and apparatus for enhancing the brightness and/or contrast ratio of display devices. In one aspect, the display devices can include a light redirector that is optically coupled with a diffuser. The light redirector includes a plurality of holographic features that can receive near-collimated light at non-normal angles with respect to a normal to a surface of the light redirector and redirects the received light along a direction that is substantially normal to the surface.
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