Cholesteric Liquid Crystal Writing Tablet Erased By A Piezoelectric Transducer
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Aug 13, 2013
filing date -
Jun 26, 2012
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Abstract
A display device includes a cholesteric liquid crystal writing tablet and a piezoelectric transducer. The piezoelectric transducer is subjected to a mechanical force that generates a voltage that is applied to the writing tablet that erases writing on the writing tablet. A further feature is a display device comprising a cholesteric liquid crystal display and a piezoelectric transducer. The piezoelectric transducer is subjected to a mechanical force that generates a voltage that is applied to the display that places the display in at least one of a color reflective planar state, a substantially transparent focal conic state and a gray scale state. Also featured is a method of erasing a cholesteric liquid crystal writing tablet.
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