A dielectric elastomer vibration system includes a dielectric elastomer vibrator with a dielectric elastomer layer and a pair of electrode layers, and a power supply device producing a potential difference across the electrode layers. The vibrator exhibits various modes or regions of relationship between potential difference and deformation induced by the potential difference: a high-response region in which a relatively large deformation is induced; a low-response region of lower-potential difference in which a relatively small deformation is induced; and a low-response region of higher-potential difference in which a relatively small deformation is induced or in which a break point of the dielectric elastomer layer is included. The power supply device produces the potential difference by applying across the electrode layers a vibration signal voltage, which is generated by combining an AC voltage with a bias DC voltage corresponding to a potential difference falling in the high-response region.

The present disclosure provides an ultrasonic sensor pixel circuit, a driving method thereof and a display panel. The ultrasonic sensor pixel circuit includes a detection module, of which a first terminal is connected with an ultrasonic sensing unit and a second terminal is connected with a first signal terminal, and the detection module is configured to generate a detection voltage according to an electric signal output from the ultrasonic sensing unit under control of the first signal terminal; an output module, of which a first terminal is connected with a third terminal of the detection module and a second terminal is connected with a read line, and the output module is configured to generate an output signal according to the detection voltage and provide the output signal to the read line.

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.

An organic film is patterned without applying a hard mask or photolithography. A hydrophilic solvent-soluble resist is placed and arranged on the organic film using a non-lithography process. The hydrophilic solvent-soluble resist is placed and arranged using a printing or lamination process. The organic film is patterned using a wet etchant that is selective to the organic film but non-selective to the hydrophilic solvent-soluble resist. The hydrophilic solvent-soluble resist protects the underlying organic film from contamination and damage, prevents undercutting, and assists in providing a desired taper profile during patterning.

A filtering apparatus formed by a plurality of channel systems. Each of the channel systems include an inlet port formed on an inlet side of the plate; no more than one outlet port formed on an outlet side of the plate; and a channel formed in the plate, the channel coupled to the inlet port and to the outlet port, wherein the ratio of the product of the capture area of the inlet ports of a channel system with the first transmissivity associated with the inlet ports to the product of the capture area of the outlet ports of a channel system with the second transmissivity associated with the outlet ports is greater than one. The channel system is configured to interact with objects of interest on a scale which is smaller than a value several orders of magnitude larger than the mean free path of an object of interest. Some plate embodiments are configured to interact with particles, such as air molecules, water molecules, or aerosols. Other plate embodiments are configured to interact with waves or wavelike particles, such as electrons, photons, phonons or acoustic waves.

A driving device generates a driving signal and outputs the driving signal to a piezoelectric element, the driving signal having a waveform obtained by using, as a first modulated wave, a first low-frequency wave having a frequency of 1 Hz or more and less than 100 Hz, using, as a second modulated wave, a waveform obtained by modulating an amplitude of a second low-frequency wave having a frequency of 100 Hz or more and 300 Hz or less with the first modulated wave, and modulating a high-frequency wave having a frequency of 20 kHz or more and 100 kHz or less with the second modulated wave.

A tactile device includes: a substrate provided with a first surface; an organic piezoelectric film arranged on the first surface side; a plurality of electrodes arranged on the first surface; and a plurality of drive circuits arranged between the substrate and the organic piezoelectric film. The plurality of electrodes includes: a common electrode arranged across a plurality of cells; and a plurality of driving electrodes respectively arranged in the plurality of cells. The plurality of drive circuits includes: a first drive circuit capable of supplying a first driving signal; and a second drive circuit capable of supplying a second driving signal. The plurality of driving electrodes includes: a first driving electrode connected to the first drive circuit; and a second driving electrode connected to the second drive circuit. The first driving electrode and the second driving electrode are arranged in each of the plurality of cells.

A display device can include a display panel including display pixels having light emitting elements, and sensing pixels including piezoelectric elements; and a driving circuit configured to drive the display panel, in which the display panel further includes a substrate; a thin film transistor array disposed on the substrate, the thin film transistor array including display driving transistors included in the display pixels; a sensor array disposed on the thin film transistor array, the sensor array including sensor driving transistors included in the sensing pixels; a piezoelectric element layer disposed on the sensor array, the piezoelectric element layer including the piezoelectric elements connected to the sensor driving transistors; and a light emitting element layer disposed on the piezoelectric element layer, the light emitting element layer including the light emitting elements, and anode electrodes of the light emitting elements are connected to the display driving transistors.

Microelectromechanical (MEMS) devices and associated methods are disclosed. Piezoelectric MEMS transducers (PMUTs) suitable for integration with complementary metal oxide semiconductor (CMOS) integrated circuit (IC), as well as PMUT arrays having high fill factor for fingerprint sensing, are described.

Described herein are methods and systems useful for interrogating protein-protein interactions. These systems utilize non-functional fragments of polypeptides that can complement each other to form a fully functional fragment in vivo. The fully functional polypeptide releases a transcription regulating polypeptide that can bind and activate or repress a reporter element.