Display Device
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United States of America Patent
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Issued Date -
Nov 13, 2008
app pub date -
Oct 13, 2005
filing date -
Oct 22, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A display device which can authenticate fingerprint without a fingerprint sensor device and can be prevented from large size or reduced the size. A display device (1) is provided with a pixel or sub pixel comprising a photo diode (11) for detecting a light from a object, a holding capacitor (13) for holding a voltage (Vn1) corresponding to an intensity of the light detected by the photo diode (11), and a refreshing means (18) for writing a voltage (Vdd or Vss) into the holding capacitor (13) (node N1) on the basis of the voltage Vn1 held in the holding capacitor (13).
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