Patent ID: 11556202

Abstract:
An apparatus (2, 22) is described which includes a touch panel (1, 21). The touch panel (1, 21) includes a layer of piezoelectric material (4) disposed between a number of sensing electrodes (5, 23, 24) and at least one counter electrode (6). The apparatus (2, 22) also includes a touch controller (3) connected to the touch panel (1, 21). The touch controller (3) is configured to determine, in response to receiving piezoelectric signals (7) from one or more of the sensing electrodes (5, 23, 24), a location (9) and an applied force (10) corresponding to a user interaction (11) with the touch panel (1, 21). The touch controller (3) is configured to determine a capacitance value (20) of one or more of the sensing electrodes (5). The touch controller is configured to operate in a force-based mode, a capacitance-based mode or a mixed force-capacitance mode depending on the type of input received.