Abstract: The invention provides a piezoelectric micro-electromechanical systems (MEMS) microphone having a base with a cavity, a piezoelectric diaphragm, and a limit element. The base has a ring base, and a support column. The piezoelectric diaphragm includes diaphragm sheets. Each diaphragm sheet have a fixing end connected with the support column and a free end suspended above the cavity. The limit element includes a limit part arranged apart from the piezoelectric diaphragm to limit the free ends in vibration directions of the diaphragm sheets, and an edge fixing plate connected with the outer edge of the limit part and arranged on the ring base. When the diaphragm sheets greatly deform upwards under impact force, deformation of the diaphragm sheets can be controlled, and the diaphragm sheets are protected to prevent the diaphragm sheets from breaking, thereby improving the stability of the piezoelectric MEMS microphone.

Abstract: The present invention provides a piezoelectric MEMS microphone having a base with a cavity, a piezoelectric diaphragm, and a restraining element. The base has a ring base circumferentially forming a cavity, a support column. The piezoelectric diaphragm includes diaphragm sheets each having a fixing end connected to a support column and a free end suspended over the cavity. The restraining element has one end fixedly connected to the free end, the other end connected to the part on the base that is not connected to the fixing end. The piezoelectric MEMS microphone of the invention can constrain the deformation of the diaphragm sheet, thereby improving the resonant frequency of the piezoelectric diaphragm, reducing the noise of the whole piezoelectric MEMS microphone.

Abstract: Provided is a piezoelectric type and capacitive type combined MEMS microphone, comprising a base with a back cavity and a capacitor system arranged on the base; wherein, the capacitor system comprises a back plate and a diaphragm; the back plate is opposite to and apart from the diaphragm to form a first sound cavity; a piezoelectric diaphragm structure is between the capacitor system and the base; a second sound cavity is formed between the capacitor system and the piezoelectric diaphragm structure; the second sound cavity is at least in communication with the first sound cavity or the back cavity; the piezoelectric type and capacitive type combined MEMS microphone can output two groups of electric signals comprising a group of electric signals output from the capacitor system and a group of electric signals output from the piezoelectric diaphragm structure, thus improving sensitivity of the microphone.

Abstract: The present disclosure provides an MEMS microphone including a base having a rear cavity and a capacitor system disposed on the base. The capacitor system includes a rear plate and a diaphragm that are spaced relatively apart to form an acoustic cavity. A piezoelectric diaphragm is attached to a side of the diaphragm, the side being away from the acoustic cavity. The piezoelectric diaphragm, under the deformation effect of the diaphragm, deforms to generate and output charges. Therefore, the MEMS microphone can output two groups of electrical signals, one group of electrical signals output by the capacitor system and one group of electrical signals output by the piezoelectric diaphragm, thereby sensitivity of the microphone is improved.

Abstract: The present application discloses an organic electroluminescent device comprising carrier transport layers. The carrier transport layers include an electron transport layer and/or a hole transport layer, at least one of the carrier transport layers is doped with inert material having a refractive index less than 1.5. The present application also provides a manufacturing method of the above-mentioned organic electroluminescent device.

Abstract: The present invention discloses a thermally activated delayed fluorescence material and application thereof in an organic electroluminescence device. The thermally activated delayed fluorescence material is a compound having the general structure of Formula I or Formula II: In Formula I and Formula II, R1 is a cyano, p is 1, 2 or 3, q is 1, 2 or 3, m is 1 or 2, n is 1 or 2, Ar1 is a phenyl substituted with one or more groups selected from C1-6 alkyl, methoxy, ethoxy, or phenyl, Ar2 and Ar3 are selected from the following groups: and X is bromine or iodine. The present invention further discloses application of the thermally activated delayed fluorescence material as a host material or a luminescent dye of a luminescent layer of an organic electroluminescence device.

Abstract: The present invention relates to a depositable ionic organic functional material having a structure selected from the formulas (21) to (26). The depositable ionic organic functional material can be used in high-efficiency blue to red OLEDs. The present invention also relates to an organic electroluminescent device using the depositable ionic organic functional material as a dopant in the organic light-emitting layer thereof.

Abstract: A method for processing seismic data from a subsurface using least squares migration or wave equation migration velocity analysis over a cost function comprising a function of a matching filter by iteratively updating the reflectivity model velocity model to yield an updated reflectivity model or updated velocity model that matches the observed seismic data.

Abstract: The present application provides a piezoelectric microphone, including a substrate having a back cavity and a piezoelectric cantilever diaphragm fixed to the substrate. The piezoelectric cantilever diaphragm includes a first diaphragm located at its center and suspended above the back cavity, and a second diaphragm fixed to the substrate and provided around the first diaphragm. The second diaphragm includes a fixed end fixed to one side of the substrate and a movable end close to the first diaphragm side and suspended above the back cavity. The piezoelectric microphone further includes one or more elastically stretchable members each connecting the first diaphragm with the movable end. The piezoelectric microphone of the present disclosure has better performance.

Abstract: The present application provides a piezoelectric microphone, and it includes a substrate having a back cavity and a piezoelectric cantilever diaphragm fixed to the substrate. The piezoelectric cantilever diaphragm includes a plurality of diaphragm flaps, and each of the diaphragm flaps has one end fixed to the substrate and another end suspended above the back cavity. Every two adjacent ones of the diaphragm flaps are spaced apart to form a gap. The piezoelectric microphone further comprises an elastically stretchable member connecting the two adjacent diaphragm flaps, and the elastically stretchable member is provided between at least one set of two adjacent ones of the diaphragm flaps. The piezoelectric microphone of the present disclosure has better performance.

Abstract: The present application provides a piezoelectric microphone including a substrate having a back cavity and a piezoelectric cantilever diaphragm fixed to the substrate, the piezoelectric cantilever diaphragm includes a fixed end fixedly connected to the substrate and a movable end connected to the fixed end and suspended above the back cavity, the piezoelectric microphone further includes a support back plate, the support back plate includes a support arm opposite to and spaced apart from the movable end of the piezoelectric cantilever diaphragm and a fixing arm that fixes the support arm. The piezoelectric microphone of the present disclosure has better stability compared to the related art.

Abstract: An organic electroluminescence device and a display apparatus, where the organic electroluminescence device includes an organic light emitting layer which includes a host material, a sensitizer material, and a resonance thermally activated delayed fluorescent material, where the host material is a wide bandgap material, and the sensitizer material is an exciplex material, a singlet state energy level for the wide bandgap material is greater than a singlet state energy level for the exciplex, and a triplet state energy level for the wide bandgap material is greater than a triplet state energy level for the exciplex, and a singlet state energy level for the exciplex material is greater than a singlet state energy level for the resonance delayed fluorescent material, and a triplet state energy level for the exciplex material is greater than a triplet state energy level for the resonance delayed fluorescent material.

Abstract: An organic electroluminescence device, a preparation method thereof, and a display apparatus, the organic electroluminescence device including an organic light emitting layer which includes a host material, a sensitizer material, and a resonance thermally activated delayed fluorescent material, where the host material is a wide bandgap material, and the sensitizer material is a thermally activated delayed fluorescent material. The singlet state energy level of the thermally activated delayed fluorescent material falls between the singlet state energy level of the wide bandgap material and the singlet state energy level of the resonance thermally activated delayed fluorescent material. The triplet state energy level of the thermally activated delayed fluorescent material falls between the triplet state energy level of the wide bandgap material and the triplet state energy level of the resonance thermally activated delayed fluorescent material.

Abstract: An organic electroluminescent device, a preparation method thereof, and a display apparatus thereof. The organic electroluminescent device includes an organic light emitting layer, the organic light emitting layer includes a host material and a resonance-type thermally activated delayed fluorescence material; the host material is an exciplex; a singlet energy level of the exciplex is greater than a singlet energy level of the resonance-type thermally activated delayed fluorescence material, and a triplet energy level of the exciplex is greater than a triplet energy level of the resonance-type thermally activated delayed fluorescence material. The present application can overcome the defects of short device lifetime and wide spectrum caused by using conventional TADF materials for emitting light at present.

Abstract: An organic electroluminescent device, a preparation method thereof, and a display apparatus. The organic electroluminescent device includes a light emitting layer, the light emitting layer includes a host material and a dye, and the host material is a triplet-triplet annihilation material, the dye includes a thermally activated delayed fluorescence material; a singlet energy level of the triplet-triplet annihilation material is greater than a singlet energy level of the thermally activated delayed fluorescence material; and a triplet energy level of the triplet-triplet annihilation material is smaller than a triplet energy level of the thermally activated delayed fluorescence material. The present application can overcome the defect of short device lifetime caused by high-energy excitons in the device at present.

Abstract: The present disclosure relates to display technologies, and particularly discloses an organic electroluminescent device. This organic electroluminescent device includes a light-emitting layer, the light-emitting includes an exciplex composed of a donor molecule and an acceptor molecule, and a wide band gap material for increasing the inter-molecular spacing between the donor molecule and the acceptor molecule. According to the device of the present disclosure, the degree of orbital overlap of HOMO and LUMO of the formed exciplex and the singlet-triplet energy level difference can be reduced, the reverse intersystem crossing rate (KRISC) of the exciplex host can be increased, the Föster energy transferred to the guest molecule can be enhanced, and the efficiency and the lifetime of the device can be improved.

Abstract: The present disclosure discloses an organic electroluminescent device and a preparation method thereof. The device includes a light-emitting layer, the light-emitting layer includes a host material, an auxiliary host material and a fluorescent dye; the host material is an exciplex prepared by mixing an electron donor material and an electron acceptor material, the auxiliary host material is a thermally activated delayed fluorescence material, a singlet energy level and a triplet energy level of the exciplex are higher than the single energy level and triplet energy level of the auxiliary host material. The above organic electroluminescent device can promote the reverse intersystem crossing of the host material and the auxiliary host material from the triplet excitons to the singlet excitons, enhance the Foster energy transfer, reduce the triplet exciton quenching, therefore the efficiency roll-off of the device is small and the external quantum efficiency is high.

Abstract: Techniques are disclosed relating to deblending of sources in multi-source geophysical survey data, including marine or land-based data. Recorded data may be aligned to a primary source. A deblending procedure may be iteratively applied to produce a residual term and deblended estimates for the primary source and one or more secondary sources. Following an iteration of the deblending procedure, the resultant data may be sorted according to a domain that renders the one or more secondary sources incoherent with respect to the primary source. The domain used for sorting may be different from a domain used to sort during an immediately prior iteration. In embodiments, the deblending procedure may use coherency filtering, and the coherency filtering may be weighted according to a signal-to-noise metric generated from the data being deblended.

Abstract: The present invention discloses an organic electroluminescence device, comprising a luminescent layer, wherein, a host material of the luminescent layer comprises a thermally activated delayed fluorescence material, the host material is doped by a dye, and the dye comprises at least one phosphorescent dye. The present invention employs a thermally activated delayed fluorescence material, whose difference between the triplet state energy level and the singlet state energy level (?EST) is relatively small. The present invention employs the material as the phosphorescence host, so part of the triplet state exciton level transfers to the singlet state excitons, and the amount of the overall triplet state excitons is smaller.

Abstract: The present disclosure provides systems and methods for the determining a rate of change of one or more analyte concentrations in a target using non invasive non contact imaging techniques such as OCT. Generally, OCT data is acquired and optical information is extracted from OCT scans to quantitatively determine a flow rate of fluid in the target; angiography is also performed using one or more fast scanning methods to determine a concentration of one or more analytes. Both calculations can provide a means to determine a change in rate of an analyte over time. Example methods and systems of the disclosure may be used in assessing metabolism of a tissue, where oxygen is the analyte detected, or other functional states, and be generally used for the diagnosis, monitoring and treatment of disease.