A PHASED ARRAY ULTRASOUND DEVICE FOR CREATING A PRESSURE FOCUS POINT

The present invention relates to a phased array ultrasound device. The phased array ultrasound device comprises a plurality of transducer elements arranged in a two dimensional (2D) array; a plurality of first electrodes, each first electrode extending along a first direction; and a plurality of second electrodes, each second electrode extending along a second direction; wherein each transducer element is associated with one first electrode and one second electrode; wherein each transducer element comprises a material located between its associated first electrode and second electrode, and is configured to emit an ultrasonic wave induced by a vibration force or an oscillation force of its material when the transducer element is actuated based on control signals applied to its associated first electrode and second electrode; wherein each transducer element has a unipolar actuation force direction; and wherein the phased array ultrasound device is configured to create a pressure focus point above or below the 2D array by actuating a set of transducer elements to form a combined ultrasonic wave. The pressure focus point may be used to provide a haptic feedback. The present invention also relates to an electronic device comprising a display; and a phased array ultrasound device. The phased array ultrasound device is arranged in or below the display of the electronic device, and is configured to create a pressure focus point above the display.