Sensing device and driving method of sensing device

A sensing device comprising:

• a plurality of sensing electrodes arranged in row and column directions to detect a close object;
• a plurality of wirings connected to each of the plurality of sensing electrodes;
• a sensing circuit connected to the plurality of wirings and detecting voltage values of the plurality of sensing electrodes in a plurality of sensing periods;
• and
• a calculation circuit connected to the sensing circuit and calculating a position of the close object in proximity using the voltage values detected by the sensing circuit;
• wherein
• the sensing circuit uses a set of sensing electrodes adjacent to each other in the row direction and the column direction as a sensing unit, sets the plurality of sensing periods consecutively, and changes the sensing electrodes included in the sensing unit to be different by one row or one column for each of the sensing periods,
• the set of sensing electrodes includes a first set of sensing electrodes, the first set of sensing electrodes includes a first electrode, a second electrode arranged in the column direction with respect to the first electrode, a third electrode arranged in the row direction intersecting the first electrode in the column direction, and a fourth electrode arranged in the row direction relative to the third electrode,
• the plurality of sensing periods includes
• a first sensing voltage sensing period,
• a second sensing voltage sensing period following the first sensing voltage sensing period,
• a third sensing voltage sensing period following the second sensing voltage sensing period, and
• a fourth sensing voltage sensing period following the third sensing voltage sensing period,
• the voltage values include:
• a first sensing voltage value detected from the first electrode, the second electrode, the third electrode and the fourth electrode during the first sensing voltage sensing period,
• a second sensing voltage value detected from at least the second electrode and the fourth electrode during the second sensing voltage sensing period,
• a third sensing voltage value detected from at least the third electrode and the fourth electrode during the third sensing voltage sensing period, and
• a fourth sensing voltage value detected from at least the fourth electrode during the fourth sensing voltage sensing period, and
• the calculation circuit is configured to calculate the position of the close object by using the first through fourth sensing voltage values.