Liquid crystal document handler CVT glass
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United States of America Patent
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Sep 26, 2017
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N/A
app pub date -
Apr 29, 2016
filing date -
Apr 29, 2016
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Abstract
According to exemplary scanning devices herein, a platen has a sheet side and a scanner side, opposite the sheet side. A scanner is located on the scanner side of the transparent platen. The platen has a constant velocity transport (CVT) scanning position at an end of the platen. A portion of the platen, located at the CVT scanning position of the platen has integral transparent electrodes and incorporates a polymer/liquid crystal filler material that is white in a first state and transparent in a second state. A scanner is located on the scanner side of the platen. A controller is electrically connected to the electrodes. The controller controls the state of the polymer/liquid crystal filler material during scanning of a document and during white calibration of the scanner.
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