Sensor device with timing control circuit outputting inverted polarity signal to the floating ground and sensing electrodes

A sensor device comprising:

• a panel including an insulating layer, a first electrode provided on a first main surface side of the insulating layer, a second electrode provided on a second main surface side opposite the first main surface of the insulating layer and sandwiching the insulating layer together with the first electrode, and a third electrode provided on the second main surface side of the insulating layer;
• and
• a control circuit including a first circuit including a timing control circuit, a first amplifier, and a second amplifier, and a second circuit including a detection circuit connected to a floating ground line and electrically isolated from the first circuit,
• the first electrode and the second electrode being located in a first area,
• the third electrode being located in a second area outside of the first area,
• the detection circuit including a detector electrically connected to the second electrode, and a first output unit,
• during a first sensing drive period,
• the first output unit outputting a first synchronization signal,
• the timing control circuit
• outputting a second synchronization signal generated based on the first synchronization signal and having a polarity inverted from the polarity of the first synchronization signal, and
• outputting a fifth synchronization signal generated based on the first synchronization signal and having the same polarity as that of the first synchronization signal,
• the first amplifier amplifying the second synchronization signal and providing the amplified second synchronization signal to each of the floating ground line and the third electrode,
• the second amplifier amplifying the fifth synchronization signal and providing the amplified fifth synchronization signal to the first electrode, and
• the detector reading a change in a sensor signal generated at the second electrode.