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United States of America Patent
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Apr 28, 2009
Grant Date -
May 15, 2008
app pub date -
Nov 13, 2007
filing date -
Nov 13, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A scanner repeats a threshold voltage correcting process over a plurality of horizontal periods prior to the sampling of a signal potential to hold a voltage corresponding to the threshold voltage of a driving transistor reliably in a retentive capacitor. Each signal line is associated with a pair of switches, one for supplying the signal potential to the signal line and the other for connecting, to the signal line, a common line for supplying a reference potential. A signal selector turns on and off the switches in each horizontal period in timed relation to a line sequential mode to switch between the signal potential and the reference potential and selectively supply the signal potential and the reference potential to the signal line of each column.
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