Integrated piezoelectric cantilever actuator and transistor for touch input and haptic feedback applications

An electronic device capable of providing haptic feedback to a user, the electronic device comprising:

• an array of haptic feedback devices, wherein at least one haptic feedback device of the array of haptic feedback devices comprises:
• a transistor comprising at least a source electrode, a drain electrode, and a gate electrode;
• and
• a cantilever actuator comprising a piezoelectric material,
• wherein the cantilever actuator is electrically isolated but mechanically connected to and integrated with the transistor through the gate electrode of the transistor,
• wherein the cantilever actuator comprises at least two electrodes separate from the source electrode, the drain electrode, and the gate electrode, wherein the at least two electrodes comprise a first electrode and a second electrode, and
• wherein the at least two electrodes allow for simultaneous actuating of the cantilever actuator separate from accessing of the transistor through the source electrode, the drain electrode, and the gate electrode.

A method, comprising:

• detecting, through a transistor, a change in induced charge of a piezoelectric film of indicative of a user input to an electronic device, wherein the piezoelectric film is electrically isolated from the transistor but mechanically connected to the transistor;
• determining, by a processor coupled to the transistor, whether a pressure was to the sensor based, at least in part, on the change in induced charge, wherein the change in induced charge is determined based, at least in part, on a threshold voltage of a transistor coupled to the piezoelectric film;
• processing, by the processor, the user input based, at least in part, on the determined pressure at the sensor;
• and
• performing, by the processor, an operation based, at least in part, on the received user input.