Touch state detection circuit, electronic device including touch state detection circuit, and touch state detection method

Abstract

Disclosed herein is a touch state detection circuit which is connected to a capacitance-type touch sensor including sensor electrodes disposed in a planar manner and which detects a touch state of a user by executing a scan process that reads out and processes detection signals sequentially output from the sensor electrodes. The touch state detection circuit includes a setting circuit which sets a scan condition related to an execution frequency of the scan process or an execution period of the scan process, and a detection circuit which detects the touch state by executing the scan process under the scan condition set by the setting circuit. When a determination condition indicating a situation in which the scan condition is required to be changed is satisfied, the setting circuit changes and resets the scan condition, and the detection circuit detects the touch state under the scan condition reset by the setting circuit.