Touch-fingerprint complex sensor, operating method thereof, and electronic apparatus including the touch-fingerprint complex sensor

A touch-fingerprint complex sensor configured to detect a touch and a fingerprint of a user, the touch-fingerprint complex sensor comprising:

• a first unit group comprising a plurality of first touch electrodes electrically connected to each other;
• a plurality of first sub-electrodes, wherein at least one of the plurality of first sub-electrodes is disposed between adjacent ones of the plurality of first touch electrodes;
• a second unit group comprising a plurality of second touch electrodes electrically connected to each other and intersecting the plurality of first touch electrodes;
• and
• a plurality of second sub-electrodes,
• wherein at least one of the plurality of second sub-electrodes is disposed between adjacent ones of the plurality of second touch electrodes, and
• the touch-fingerprint complex sensor is configured to, in a touch detecting mode, selectively drive the plurality of first touch electrodes and the plurality of second touch electrodes and apply a fixed bias voltage to the plurality of first sub-electrodes and the plurality of second sub-electrodes.

A touch-fingerprint complex sensor comprising:

• a touch pad comprising:
• a plurality of first electrodes extending in a first direction;
• and
• a plurality of second electrodes extending in a second direction, wherein the second direction intersects the first direction,
• wherein the plurality of first electrodes comprises:
• a first plurality of first touch electrodes electrically connected to each other;
• a second plurality of first touch electrodes electrically isolated from each other of the plurality of first electrodes;
• a first plurality of first sub-electrodes disposed on a first side of one of the first plurality of first touch electrodes;
• and
• a second plurality of first sub-electrodes disposed on a second side of the one of the first plurality of first touch electrodes,
• wherein each of the first plurality of first sub-electrodes and each of the second plurality of first sub-electrodes is electrically connected to each other, and
• wherein the plurality of second electrodes comprises:
• a first plurality of second touch electrodes electrically connected to each other;
• a second plurality of second touch electrodes electrically isolated from each other of the plurality of second electrodes;
• a first plurality of second sub-electrodes disposed on a first side of one of the first plurality of second touch electrodes;
• a second plurality of second sub-electrodes disposed on a second side of the one of the first plurality of second touch electrodes;
• wherein each of the first plurality of second sub-electrodes and each of the second plurality of second sub-electrodes is electrically connected to each other.