IMAGE-DISPLAY-DEVICE DRIVE METHOD, IMAGE DISPLAY DEVICE, AND IMAGE DISPLAY SYSTEM
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United States of America Patent
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Issued Date -
Mar 6, 2014
app pub date -
Aug 6, 2012
filing date -
Dec 7, 2011
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Abandoned
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Abstract
Discharge for detecting the position coordinates of an electronic pen is caused stably, and the position coordinates are detected accurately. For this purpose, in a driving method of an image display device, an image display subfield group constituted of image display subfields, a y-coordinate detection subfield, and an x-coordinate detection subfield are set in one field. An initializing period, in which an up-ramp voltage and a down-ramp voltage are applied to the scan electrodes, is set in the x-coordinate detection subfield, and the x-coordinate detection subfield is disposed immediately after the y-coordinate detection subfield.
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