Tactile feedback device, related method, and touch display device containing the same

A tactile feedback device, comprising:

• a deformable structure, a driver coupled to the deformable structure, a controller coupled to the driver, a first signal line, a second signal line, and a thin-film transistor coupled to a deformable unit, wherein:
• the deformable structure is configured to include a plurality of deformable units placed on a display panel, each of the plurality of deformable units being capable of deforming along a direction at an angle to a plane the plurality of deformable units is placed on;
• the controller is configured to generate and send a control signal to the driver, the control signal being based on a touch location of a touch motion;
• and the driver is configured to drive deformable units corresponding to the touch location to deform based on the control signal;
• the driver drives the deformable units corresponding to the touch location to deform along a direction perpendicular to the plane the plurality of deformable units is placed on;
• each of the plurality of deformable units includes a first electrode, a second electrode, and a piece of electrostrictive material between the first electrode and the second electrode;
• and when the driver applies a voltage signal between the first electrode and the second electrode, the piece of electrostrictive material deforms in response to the voltage signal;
• the first signal line is coupled to a source electrode of the first thin-film transistor, the second signal line is coupled to a gate electrode of the first thin-film transistor, the first electrode of the deformable unit is coupled to a drain electrode of the thin-film transistor, and the second electrode of a deformable unit is grounded;
• and when the second signal line coupled to the thin-film transistor is applied with a voltage scanning signal, and the first signal line coupled to the thin-film transistor is applied with a voltage driving signal, the deformable unit deforms.