Input/output device and driving method thereof
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United States of America Patent
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Dec 10, 2013
Grant Date -
Jan 5, 2012
app pub date -
Jun 22, 2011
filing date -
Jul 2, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An object is to reduce power consumption. An input/output device including: a display selection signal output circuit outputting a display selection signal during a first display mode and stopping outputting the display selection signal during a second display mode; a photodetection reset signal output circuit outputting N (N is a natural number) photodetection reset signals during a first photodetection mode and outputting M (M is a natural number smaller than N) photodetection reset signals during a second photodetection mode; an output selection signal output circuit outputting N output selection signals during the first photodetection mode and outputting M output selection signals during the second photodetection mode; and a photodetector circuit being reset in accordance with a photodetection reset signal, generating data according to an intensity of light entering the photodetector circuit subsequently, and outputting the data as a data signal in accordance with the output selection signal.
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