Reflective display comprising a frontlight with extraction features and a light redirecting optical element
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United States of America Patent
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May 16, 2017
Issued Date -
N/A
app pub date -
Apr 30, 2015
filing date -
Apr 16, 2010
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Abstract
A display includes a reflective spatial light modulator having a reflective surface, a lightguide comprising a core layer, a first cladding layer, and a light emitting region comprising a plurality of light extraction features arranged in a pattern that varies spatially in the light emitting region to frustrate totally internally reflected light propagating within the core layer such that light exits the core layer in the light emitting region into the first cladding layer. A light redirecting optical element is optically coupled to the second side of the first cladding layer, and includes a plurality of light redirecting features directing frustrated totally internally reflected light from the plurality of light extraction features toward the reflective spatial light modulator.
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