Displays and sensors integrated with multi-state cholesteric liquid crystal devices
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United States of America Patent
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Jun 2, 2015
Grant Date -
Nov 22, 2012
app pub date -
Apr 23, 2012
filing date -
Apr 21, 2011
priority date (Note) -
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Abstract
A sensing device may include a cholesteric crystal device including two optically transparent substrates; a liquid crystal having portions adapted for producing a plurality of optical states, said liquid crystal being arranged between the two optically transparent substrates; an optical sensor for changing optical states of respective portions of said liquid crystal to produce a range of respective optical states including all optical states produced by said liquid crystal ranging from one state to any combination of broadband reflection, tunable narrow band reflection, light scattering, and transparency in accordance with an amount of voltage applied across said cholesteric crystal device for changing optical states.
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