An apparatus for performing gesture recognition and control based on ultrasonic positioning is disclosed. The apparatus includes an ultrasonic transmitter module for providing an original ultrasonic signal; an ultrasonic receiver for receiving an reflected ultrasonic signal corresponding to the original ultrasonic signal; a computing module for computing a frequency shift within a time period from the original ultrasonic signal being transmitted to the reflected ultrasonic signal being received, and converting the frequency shift into a gesture characteristic signal; a gesture database for providing reference gesture characteristic signals, and control signals corresponding to the reference gesture characteristic signals respectively; and a gesture recognition and control module for comparing the gesture characteristic signal with the reference gesture characteristic signals in the gesture database, and selecting a corresponding control signal from the data base according to a comparison result.

An apparatus for performing gesture recognition and control based on ultrasonic positioning is disclosed. The apparatus includes an ultrasonic transmitter module for providing an original ultrasonic signal; an ultrasonic receiver for receiving an reflected ultrasonic signal corresponding to the original ultrasonic signal; a computing module for computing a frequency shift within a time period from the original ultrasonic signal being transmitted to the reflected ultrasonic signal being received, and converting the frequency shift into a gesture characteristic signal; a gesture database for providing reference gesture characteristic signals, and control signals corresponding to the reference gesture characteristic signals respectively; and a gesture recognition and control module for comparing the gesture characteristic signal with the reference gesture characteristic signals in the gesture database, and selecting a corresponding control signal from the data base according to a comparison result.

A touch device and a sensing compensation method are provided. The touch device may include a touch panel, a sensing compensation circuit and a sensing circuit. The sensing compensation circuit may be coupled to the touch panel for providing a compensation-impedance according to features of the touch panel. The sensing circuit may be coupled to the sensing compensation circuit. The sensing circuit receives touch information compensated by the sensing compensation circuit.

A mutual capacitance touch sensing device and a sine wave measuring method is disclosed. A sine wave generator of a driver and sensor module of a touch sensing panel of the mutual capacitance touch sensing device uses a clock to generate multiple sine waves according to a lookup table being loaded therein, enabling a selective circuit to transmit the sine waves to driving lines of the touch sensing panel in a proper order so that each sine wave at each driving line is capacitive-coupled to a respective sensing line through a respective crossover point to produce a respective sensing signal, and then a measurement unit scans the generated sensing signal subject to the lookup table in the sine wave generator and then provides the measured signals to a processor for processing.

An ultrasonic sensor and a display device is disclosed where a piezoelectric material disposed in each pixel area of the ultrasonic sensor is formed to have various thicknesses, or an electrode driving the piezoelectric material disposed in each pixel area has various areas, thereby providing the ultrasonic sensor that generates ultrasonic waves in various frequency bands. Accordingly, it can expand the frequency band of the ultrasonic waves generated by the ultrasonic sensor to improve its sensing performance, and obtain information of various frequency bands to provide the ultrasonic sensor capable of both the fingerprint sensing and the proximity sensing.

An ultrasonic sensor and a display device is disclosed where a piezoelectric material disposed in each pixel area of the ultrasonic sensor is formed to have various thicknesses, or an electrode driving the piezoelectric material disposed in each pixel area has various areas, thereby providing the ultrasonic sensor that generates ultrasonic waves in various frequency bands. Accordingly, it can expand the frequency band of the ultrasonic waves generated by the ultrasonic sensor to improve its sensing performance, and obtain information of various frequency bands to provide the ultrasonic sensor capable of both the fingerprint sensing and the proximity sensing.

Methods for determining a touch-and-hold touch event on a touch sensitive interaction surface of a touch sensing device are provided and comprise the steps of: a) determining a touch location of the touch event based on vibrations, such as bending waves, propagating through the interaction surface and b) determining whether the touch event comprises a hold touch event based on a sensed airborne signal. A device configured to carry out such methods is also provided.

Methods for determining a touch-and-hold touch event on a touch sensitive interaction surface of a touch sensing device are provided and comprise the steps of: a) determining a touch location of the touch event based on vibrations, such as bending waves, propagating through the interaction surface and b) determining whether the touch event comprises a hold touch event based on a sensed airborne signal. A device configured to carry out such methods is also provided.

Method for image acquisition in an ultrasonic biometric imaging device, the method comprising: determining a target area of a touch surface; by a plurality of ultrasonic transducers arranged at a periphery of the touch surface, emitting a shaped ultrasonic beam towards the target area using transmit beamforming; by the ultrasonic transducers, receiving reflected ultrasonic echo signals defined by received RF-data, the reflected ultrasonic echo signals resulting from interactions with an object in contact with the touch surface at the target area; subtracting background RF-data from the received RF-data to form a clean image; performing receive side beamforming to form a reconstructed image from the clean image; and for a plurality of reconstructed images resulting from a plurality of emitted ultrasonic beams for a given target area, adding the plurality of reconstructed images to form a summed image.

Method for image acquisition in an ultrasonic biometric imaging device, the method comprising: determining a target area of a touch surface; by a plurality of ultrasonic transducers arranged at a periphery of the touch surface, emitting a shaped ultrasonic beam towards the target area using transmit beamforming; by the ultrasonic transducers, receiving reflected ultrasonic echo signals defined by received RF-data, the reflected ultrasonic echo signals resulting from interactions with an object in contact with the touch surface at the target area; subtracting background RF-data from the received RF-data to form a clean image; performing receive side beamforming to form a reconstructed image from the clean image; and for a plurality of reconstructed images resulting from a plurality of emitted ultrasonic beams for a given target area, adding the plurality of reconstructed images to form a summed image.