A fingerprint recognition module, a display panel and driving method, and a display device are provided. The fingerprint recognition module includes a first electrode layer including a plurality of first electrodes, and a piezoelectric layer disposed on a side of the first electrode layer. The fingerprint recognition module also includes a second electrode layer disposed on a side of the piezoelectric layer facing away from the first electrode layer. The second electrode layer includes a plurality of second electrodes that are arranged along a first direction, and one second electrode overlaps at least two first electrodes. Moreover, the fingerprint recognition module includes a flexible circuit board bonded and connected to the plurality of second electrodes. In a plane parallel to the first electrode layer, the plurality of second electrodes and the flexible circuit board are arranged along a second direction, and the first direction intersects the second direction.

A method of fabricating a film vibration device, including: photoetching a surface of a silicon wafer to form a circular-hole array; etching an aluminum layer on the silicon wafer; etching the silicon wafer to form a through-hole array to obtain a porous silicon wafer; attaching a polyethylene terephthalate (PET) sheet to a side of the porous silicon wafer; ablating the PET sheet to obtain a porous PET film; attaching a polyvinylidene fluoride (PVDF) film to a lower side of the porous silicon wafer; performing vacuumization above the porous silicon wafer, while heating the PVDF film below the porous silicon wafer to create dome micro-structures on the PVDF film; and laminating the porous PET film on each of two sides of the PVDF film to obtain the film vibration device. This application also provides a cleaning device having the film vibration device.

The invention relates to the field of ultrasonic imaging detection, and more particularly, to an ultrasonic system of a contact type flexible conformal ultrasonic probe and a method for the same. The ultrasonic system comprises: a flexible probe, comprising a flexible detection surface, a plurality of probe units, and a soft film sensing surface; a switch module; a control module, comprising: a transmitting control unit for sequentially controlling the probe units in the probe array to transmit the ultrasonic signal; a receiving control unit for sequentially controlling the probe units in the probe array to receive the ultrasonic signal, and for processing the ultrasonic signal to obtain a ultrasonic image. The present invention has the following beneficial effects: the use of a flexible probe for acquiring an ultrasonic image allows to solve the problem that the operation process and imaging steps are complicated when using a rigid probe.

An acoustic wave image generation apparatus for generating a photoacoustic image and a Doppler image is provided with a setting unit that sets a region of interest in the Doppler image, and a receiving-aperture controlling unit that sets receiving apertures of an acoustic wave detection probe for detecting photoacoustic waves to apertures smaller than all receiving apertures that the acoustic wave detection probe has, on the basis of a size of the region of interest, and for setting positions of the receiving apertures on the basis of a position of the set region of interest.

The present disclosure provides an ultrasonic module, an ultrasonic sensor and a display screen, and belongs to a display technical field, and may at least partly solve the problem that the current ultrasonic module has a low conversion rate of the ultrasonic wave. The present disclosure discloses an ultrasonic module including: a piezoelectric material layer; a first electrode unit arranged at a side of the piezoelectric material layer; and a second electrode unit arranged on a side of the piezoelectric material layer distal to the first electrode unit, wherein the second electrode unit includes a plurality of first sub-electrode layers and a plurality of first conductive elastic material blocks arranged at intervals along a direction parallel to an extending direction of the piezoelectric material layer, the plurality of first conductive elastic material blocks are arranged between the plurality of first sub-electrode layers and the piezoelectric material layer, and each of the plurality of first sub-electrode layers corresponds to a corresponding one of the plurality of first conductive elastic material blocks.

An apparatus includes an ultrasonic transmitter, an ultrasonic receiver, and an acoustic delay gradient layer disposed in an acoustic path between the ultrasonic transmitter and the ultrasonic receiver. The acoustic delay gradient layer is configured to cause a reflection from a platen interface of the transmitted ultrasonic signal to reach the first receiver region at a first time and the reflection from the platen interface of the transmitted ultrasonic signal to reach the second receiver region at a second time that is different from the first time. The apparatus can further include a controller configured to set for a first region or portion of the receiver, a first range gate window (RGW). The controller is also configured to set, for a second region or portion of the receiver, a second RGW, and to establish a first temporal delay between the first RGW and the second RGW.

An acoustic imaging system coupled to a sensing plate to define an imaging surface. The acoustic imaging system includes an array of piezoelectric acoustic transducers coupled to the sensing plate opposite the imaging surface and formed using a thin-film manufacturing process over an application-specific integrated circuit that, in turn, is configured to leverage the array of piezoelectric actuators to generate an image of an object at least partially wetting to the imaging surface.

There is provided systems, devices and methods for system (100) for generating an acoustic-potential field of ultrasonic waves, using an array of acoustic micromachined ultrasonic transducer, MUT, elements, the array of acoustic MUT elements being comprised in one or more micromachined ultrasonic transducer, MUT; and having a controller being communicably connected to two or more of said acoustic MUT elements in said array, and being configured to control each of the two or more acoustic MUT elements to emit a modulated ultrasonic signal comprising a plurality of ultrasound waves towards one or more common focal points according to a respective phase shift of each of the two or more acoustic MUT elements, configured to cause the ultrasound waves of the modulated ultrasonic signals to be constructively combined at the common focal point(s), so as to generate an acoustic-potential field of ultrasonic waves.

An ultrasonic sensor and a display device and may drive a plurality of sensing pixels disposed in the ultrasonic sensor simultaneously to transmit an ultrasonic wave, may make a first electrode disposed in a sensing pixel to be floated at a timing receiving a reflected signal to store the signal, and then may perform a sensing sequentially. Therefore, as an accurate sensing may be possible while reducing a duration and a number of an ultrasonic wave transmitting, a sensitivity and an accuracy of a sensing may be maintained while improving a driving efficiency of the ultrasonic sensor.

Aquatic tracking makes use of acoustics, rather than other signals that do not travel as well in water. Tracking devices are used to monitor species of fish and other aquatic animals to monitor how their populations and movements are in nature, and how or whether those populations and movements are affected by, for example, hydroelectric dams and other manmade structures and phenomena. Often, the trackers inserted in aquatic animals adversely affect the animals and can lead to mortality or changed behaviors. New solutions that decrease the size and weight of such tracking devices are disclosed herein, enabling better tracking of aquatic animals that is less likely to cause adverse effects to those populations.