A terminal control method, a terminal and a non-transitory computer-readable storage medium are provided. The terminal control method includes: receiving, by a microphone, a detection audio signal emitted from a speaker and having a frequency within a pre-set detection frequency range; acquiring actual audio parameters of the detection audio signal when being received by the microphone, and original audio parameters of the detection audio signal when being emitted from the speaker; determining a relative state between the microphone and the speaker according to the actual audio parameters and the original audio parameters; determining a terminal control operation to be performed, according to the relative state and a pre-set correspondence between relative states and terminal control operations; and performing the determined terminal control operation on a terminal where the microphone is located.

An electronic device for gesture recognition, includes a processor operably connected to a transceiver. The transceiver is configured to transmit and receive signals for measuring range and speed. The processor is configured to transmit the signals, via the transceiver. in response to a determination that a triggering event occurred, the processor is configured to track movement of an object relative to the electronic device within a region of interest based on reflections of the signals received by the transceiver to identify range measurements and speed measurements associated with the object. The processor is also configured to identify features from the reflected signals, based on at least one of the range measurements and the speed measurements. The processor is further configured to identify a gesture based in part on the features from the reflected signals. Additionally, the processor is configured to perform an action indicated by the gesture.

Improving the accuracy of ultrasonic touch sensing and fingerprint imaging using acoustic impedance matching is disclosed. Acoustic impedance mismatches between an ultrasonic transducer array and a sensing plate can be reduced to maximize energy transfer and minimize parasitic reflections. A reduction in acoustic impedance mismatches can be accomplished using (i) a composite epoxy having a higher acoustic impedance than epoxy alone, (ii) one or more matching layers having an acoustic impedance that is approximately the geometric mean of the acoustic impedance of the sensing plate and the acoustic impedance of the transducer array, (iii) pores or perforations in the sensing plate, or (iv) geometric structures formed in the sensing plate. In addition, parasitic reflections can be suppressed using an absorbent layer.

An ultrasonic fingerprint sensor apparatus is provided. The ultrasonic fingerprint sensor apparatus includes a base substrate; a first electrode layer on the base substrate, and including an array of a plurality of first electrodes spaced apart from each other by an inter-electrode region; a piezoelectric layer on a side of the first electrode layer away from the base substrate; a second electrode layer on a side of the piezoelectric layer away from the base substrate, and including one or more second electrodes; and a first reference electrode layer configured to provide a first reference voltage. An orthographic projection of the first electrode layer on the base substrate is substantially non-overlapping with an orthographic projection of the second electrode layer on the base substrate. The first electrode layer and the first reference electrode layer are between the base substrate and the piezoelectric layer.

An ultrasonic touch sensor is proposed for attachment to a casing, having a semiconductor chip including a substrate side and a component side, the semiconductor chip including an ultrasonic transducer element and the ultrasonic transducer element being arranged on the component side, having an acoustic coupling medium covering the semiconductor chip at least in the region of the ultrasonic transducer element, having electrical contact elements for controlling the ultrasonic transducer element, and the electrical contact elements being arranged on the component side of the semiconductor chip.

An ultrasonic touch sensor is proposed for attachment to a casing, having a semiconductor chip including a substrate side and a component side, the semiconductor chip including an ultrasonic transducer element and the ultrasonic transducer element being arranged on the component side, having an acoustic coupling medium covering the semiconductor chip at least in the region of the ultrasonic transducer element, having electrical contact elements for controlling the ultrasonic transducer element, and the electrical contact elements being arranged on the component side of the semiconductor chip.

A touch sensor includes a touch structure arranged over an ultrasound port; an array of transceiver transducers arranged inside the ultrasound port and configured to generate a main directivity lobe directed at a touch interface, receive an ultra-sonic reflected wave produced at least in part by internal reflection of the main directivity lobe at the touch interface, and convert the ultra-sonic reflected wave into at least one measurement signal; a controller configured to modulate a directivity characteristic of the main directivity lobe by selectively activating the transmit transducers; and a receiver circuit configured to determine a size of a contact patch of a touch event present at the touch interface based on the at least one measurement signal and the directivity characteristic of the main directivity lobe, and determine an amount of contact force applied during the touch event based on the size of the contact patch.

A system providing various improved perceptions techniques for haptic feedback above interactive surfaces that require no contact with either tools, attachments or the surface itself is described. A range of receptors in a perceiving member which is part of the human body is identified to create substantially uniformly perceivable feedback. A vibration frequency that is in the range of the receptors in the perceiving member is chosen and dynamically altered to create substantially uniformly perceivable feedback throughout the receiving member.

A system providing various improved perceptions techniques for haptic feedback above interactive surfaces that require no contact with either tools, attachments or the surface itself is described. A range of receptors in a perceiving member which is part of the human body is identified to create substantially uniformly perceivable feedback. A vibration frequency that is in the range of the receptors in the perceiving member is chosen and dynamically altered to create substantially uniformly perceivable feedback throughout the receiving member.

A virtual and augmented reality instruction system may include a complete format and a portable format. The complete format may include a board system to capture all movement (including writing and erasing) on the board's surface, and a tracking system to capture all physical movements. The portable format may include a touch-enabled device or digital pen and a microphone, and is designed to capture a subset of the data captured by the complete format. In one embodiment of the complete format, the board system and the tracking system can communicate with each other through a network, and control devices (such as a laptop, desktop, mobile phone and tablet) can be used to control the board system and tracking system through the network. In further embodiments of the complete format, augmented reality can be achieved within the tracking system through the combination of 3D sensors and see through augmented reality glasses.