Touch panel system, display device, and method for controlling touch panel for detecting position and pressure of input

A touch panel system comprising:

• a capacitive touch panel;
• and
• control circuitry to control the capacitive touch panel,
• wherein:
• the capacitive touch panel includes includes:
• a first substrate, a second substrate,
• a first dielectric layer located between the first substrate and the second substrate,
• a plurality of drive electrodes located on the first substrate,
• a plurality of floating island electrodes located on the first substrate,
• a plurality of pressure detection electrodes located on the second substrate, and
• a plurality of position detection electrodes located on the second substrate,
• each of the plurality of drive electrodes overlaps at least part of a corresponding one of the plurality of pressure detection electrodes, and each of the plurality of floating island electrodes overlaps at least part of a corresponding one of the plurality of position detection electrodes in plan view,
• the control circuitry further provides a drive signal to the plurality of drive electrodes and corrects a pressure detection signal obtained from each of the plurality of pressure detection electrodes by using a position detection signal obtained from a position detection electrode, among the plurality of position detection electrodes, that is adjacent to the each of the plurality of pressure detection electrodes,
• the control circuitry includes a drive unit, a charge detection unit, and a correction unit,
• the drive unit generates the drive signal,
• the charge detection unit generates the position detection signal and the pressure detection signal from the position detection electrode and each of the plurality of pressure detection electrodes,
• the correction unit corrects the pressure detection signal based on the position detection signal and generates a corrected pressure detection signal, and
• the correction unit amplifies the position detection signal and subtracts the amplified position detection signal from the pressure detection signal so as to generate the corrected pressure detection signal.