397results about How to "Reduce the starting voltage" patented technology

A gimbal-type torsional z-axis micromachined gyroscope with a non-resonant actuation scheme measures angular rate of an object with respect to the axis normal to the substrate plane (the z-axis). A 2 degrees-of-freedom (2-DOF) drive-mode oscillator is comprised of a sensing plate suspended inside two gimbals. By utilizing dynamic amplification of torsional oscillations in the drive-mode instead of resonance, large oscillation amplitudes of the sensing element is achieved with small actuation amplitudes, providing improved linearity and stability despite parallel-plate actuation. The device operates at resonance in the sense direction for improved sensitivity, while the drive direction amplitude is inherently constant within the same frequency band.

The present invention relates to micro-electro-mechanical systems (MEMS). The present invention relates to a design feature that allows lower actuation voltage for electrostatically actuated structures (i.e., switches or mirrors). The present invention further relates to a method for fabricating such a design that allows lower actuation voltage.

This invention provides a very sensitive optical attenuator, which can be used to couple and attenuate optical signals between optical fibers with a wide range of attenuation level. Such an optical attenuator includes a flexible conductive membrane to be moved by an external force, such as electrostatic force, to achieve deformation of the conductive membrane. The conductive membrane can be formed, for example, by a vacuum deposited silicon nitride film. A thin metallic, conductive layer is then deposited on the flexible membrane to form a reflective mirror to receive and reflect incident optical signals. The semiconductor structure includes one or more spacing posts, with which the first structural member is to be joined and bonded. Electrodes are placed on the semiconductor structure in close proximity to the flexible membrane. At various areas of the semiconductor structure, additional spacing posts are added to cause deformation of the conductive membrane when a voltage is applied between the membrane and the electrodes on the semiconductor structure.

The present invention is a plasma etching method including: an arranging step of arranging a pair of electrodes oppositely in a chamber and making one of the electrodes support a substrate to be processed in such a manner that the substrate is arranged between the electrodes, the substrate having an organic-material film; and an etching step of applying a high-frequency electric power to at least one of the electrodes to form a high-frequency electric field between the pair of the electrodes, supplying a process gas into the chamber to form a plasma of the process gas by means of the electric field, and plasma-etching the organic-material film of the substrate by means of the plasma partway in order to form a groove having a flat bottom. A frequency of the high-frequency electric power applied to the at least one of the electrodes is 50 to 150 MHz in the etching step.

The invention discloses a variable emissivity and variable reflectivity electrochromic intelligent thermal control coating and a preparation method. Due to the adoption of conductive polymer advanced doping control and multi-layer composite photoelectric matching ways, initial electrochromic voltage is effectively reduced, and variation ranges of reflectivity and emissivity of an electrochromic active layer are widened. The prepared electrochromic coating adopts DC drive, ensures the driving voltage of lower than 2V, and has the reflectivity variations of more than 0.4 and the emissivity variations of more than 0.25; and after positive and negative 100-DC temperature alternation is performed on the coating for 100 times, the reflectivity and emissivity variations of the coating still meetthe indexes, so the coating substantially satisfies the needs of aerospacecrafts in intelligent thermal control.

An active matrix electrowetting on dielectric (AM-EWOD) device includes a substrate electrode and a plurality of array elements, each array element including an array element electrode. The AM-EWOD device further includes thin film electronics disposed on a substrate. The thin film electronics includes first circuitry configured to supply a first time varying signal V1 to the array element electrodes, and second circuitry configured to supply a second time varying signal V2 to the substrate electrode. An actuation voltage is defined by a potential difference between V2 and V1, and the first circuitry further is configured to adjust the amplitude of V1 to adjust the actuation voltage. V1 may be adjusted to adjust the actuation voltage while V2 remains unchanged. The actuation voltage may be controlled to operate the AM-EWOD device between high and low voltage modes of operation in accordance with different droplet manipulation operations to be performed.

The invention discloses a composite hole transport layer with a multi-layer periodic doping structure, an LED device structure and application and preparation method of the LED device structure. By doping a metal oxide material in a hole organic transport layer of a quantum-dot light emitting device, the hole transport layer (HTL) taking the doping organic layer as a structural unit and with multi-layer periodic doping is fabricated, the hole injection capability of the device is remarkably improved, so that the carrier injection balance in the device is improved. Meanwhile, the influence of the doping proportion of the metal oxide doping material in the HTL on the light emitting property of the device is symmetrically researched. The structure is not limited to a quantum-dot LED, and the device structure can be implanted to other types of photoelectric devices.

The present invention provides an electronic expansion valve, comprising a leading screw, a valve needle and a valve needle sleeve. It further comprises: a washer provided in an annular groove, which is provided at the lower end of the leading screw in the circumferential direction, and a thickness of the washer is less than a width of the annular groove; the valve needle sleeve abuts against the upper surface of the washer and is fixedly connected with the valve needle; and a spring is provided between the washer and the valve needle. By arranging the washer in the annular groove provided at the lower end of the leading screw in the circumferential direction, with the thickness of the washer being less than the width of the annular groove, and by arranging the spring between the valve needle and the washer, the washer is enabled to rotate around the annular groove in the circumferential direction and move up and down in the annular groove, improving the reliability of the electronic expansion valve.

The invention relates to a phenanthroimidazole symmetric derivative host material. The structure of the host material is represented by formula I, and can be used to form an organic electroluminescent device with the advantages of high luminescence efficiency, low driving voltage, long life, high brightness and high color purity. In the formula I, R1 and R2 are respectively independently selected from the hydrogen atom, substituted or unsubstituted C1-C30 alkyl groups, C1-C30 cycloalkyl groups, C1-C30 saturated alkyl groups, substituted or unsubstituted C1-C30 alkyloxy groups, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C6-C30 aryloxy groups, substituted or unsubstituted C6-C30 arylamino groups, substituted or unsubstituted C2-C30 heterocyclic groups, substituted or unsubstituted C6-C30 fused polycyclic groups, hydroxy groups, cyan groups or substituted or unsubstituted amino groups.

The present invention relates to a novel organic compound and applications thereof, and an organic electroluminescent device using the compound, wherein the compound has a structure represented by thefollowing formula defined in the specification, wherein Y<1>, Y<2> and Y<3> are respectively and independently selected from H and B, at most one of Y<1>, Y<2> and Y<3> is H, X<1>, X<2> and X<3> arerespectively and independently selected from N and H, at most one of X<1>, X<2> and X<3> is H, X<4>, X<5> and X<6> are respectively and independently selected from H, a single bond, O, S and CR, R<1>-R<18> are respectively and independently selected from hydrogen, deuterium, substituted or unsubstituted C1-C36 alkyl, substituted or unsubstituted C6-C48 monocyclic aromatic hydrocarbon or fused ringaromatic hydrocarbon, and substituted or unsubstituted C3-C48 monocyclic heteroaromatic hydrocarbon or fused ring heteroaromatic hydrocarbon, and the two adjacent groups in R<1>-R<18> can be bonded to form C1-C10 cycloalkane, C6-C30 aromatic hydrocarbon or C5-C30 heteroaromatic hydrocarbon. According to the present invention, with the application of the compound as the light emitting layer material in an OLED device, the compound exhibits excellent device performance and excellent stability. The present invention further discloses an organic electroluminescent device using the compound represented by the general formula.

An electrospinning direct-writing jet-printing device enhancing the focusing function by virtue of double layers of air relates to an electrospinning direct-writing jet-printing device and is provided with a jet head device, air supply devices, a solution tank, a solution supply device, a high-voltage power supply and a collection plate, wherein the jet head device is provided with an outer-layer air jet nozzle, an inner-layer air jet nozzle and a solution jet nozzle; the three jet nozzles are provided with coaxial central through holes; the solution jet nozzle is arranged in the central through hole of the inner-layer air jet nozzle; the inner-layer air jet nozzle is arranged in the central through hole of the outer-layer air jet nozzle; the outer-layer air jet nozzle is provided with an air inlet; the inner-layer air jet nozzle is provided with an air inlet; the solution jet nozzle is provided with a solution inlet hole; the air inlets of the inner-layer air jet nozzle and the outer-layer air jet nozzles are connected with the air supply devices; the solution tank is arranged on the solution supply device and is communicated with the solution jet nozzle through a solution supply pipe; the anode of the high-voltage power supply is connected with the solution inlet hole of the solution jet nozzle; the cathode of the high-voltage power supply is connected with the collection plate; and the collection plate is positioned under the jet head device. The electrospinning direct-writing jet-printing device can strengthen restriction on jet flow, maintain the jet stability of the jet flow and improve the focusing effect.

The object of the invention is to provide an organic electroluminescent element which reduces the luminescence starting voltage, increases the luminescence brightness, and has excellent stability with repeated use. The invention achieves these objects by providing an organic electroluminescent element comprising at least a positive electrode, luminescing layer, and negative electrode, wherein said negative electrode is a compound layer of magnesium and a metal having a higher work function than magnesium, and the exterior surface side of said compound layer has a higher percentage of metal having a high work function.

The invention relates to a method for manufacturing an anodic aluminum oxide template and a method for manufacturing a field emission cathode array material by using the aluminum oxide template. The anodic aluminum oxide template with a regular appearance and a clean surface is manufactured by adopting a series of surface protection measures; and a field emission vertical nanowire or nanotube array cathode material is manufactured by pouring organic substances, metal organic solution or sol into a nano hole of the aluminum oxide template by a water method, a heat method and the like through processes such as gelation, high temperature carbonization, aluminum oxide template removal and the like. The field emission cathode material manufactured by the method has regular appearance and low starting voltage during field emission performance test; furthermore, the method process is simpler; and manufacturing of large-area field emission materials can be realized easily.

The invention discloses an organic light emitting device, which comprises a glass substrate, an anode, a hole injection layer, a hole transmission layer, a light emitting layer, an electron transmission layer, an electron injection layer, and a cathode stacked in sequence, wherein the hole injection layer comprises a graphene oxide layer and a metallic oxide layer. The hole injection layer has a two-layer structure, the original hole injection barrier is separated into two parts, the hole firstly jumps into the graphene oxide layer from the anode and then jumps into the metallic oxide layer form the graphene oxide layer, and the hole is finally injected into the hole transmission material from the metallic oxide layer, and therefore, starting voltage of the device is reduced, and the light efficiency is improved. The invention also discloses an organic light emitting device manufacturing method. Graphene is adopted as raw material, the graphene oxidation process can be realized in a simple oxidation method, and the preparation method is simple.

The invention discloses an organic compound. The structural formula of the organic compound is shown in a formula I. When being used as a material of an organic electroluminescence element, the organic compound is capable of reducing starting voltage and improving luminescence efficiency and luminance. The invention further discloses application of the organic compound.

The invention relates to design and synthesis of an organic electroluminescent blue-light material with phenanthroimidazole and anthracene as the central unit structure and application of the material in a blue organic light-emitting diode (OLED). The material takes phenanthroimidazole as the core. Groups with different electronic properties are bonded at positions C1 and N2, and the glass transition temperature is raised so as to effectively solve carrier injection and realize high efficiency exciton recombination radically, thus further realizing combination of high efficiency light-emitting and energy level adjustment of the material. In addition, polarity of the compound can be adjusted through pushing/pulling an electron group. Compared with the blue fluorescence of common blue fluorescent main material 2-methyl-9, 10-di(naphth-2-yl)anthracene (M-ADN), the OLED has substantial effects in reduction of operating voltage and efficiency enhancement, so that the material provided in the invention can be widely applied in the field of organic electroluminescence.

The invention relates to the technical field of organic electroluminescence, in particular to an organic compound, an application of the organic compound and an organic electroluminescence device comprising the organic compound. The general formula compound of the present invention has a structure represented by the following formula: wherein each of ring A, ring B, ring C and ring D independentlyrepresents any one of a C5-C20 monocyclic aromatic ring or fused aromatic ring, a C4-C20 monocyclic heterocyclic ring or fused heterocyclic ring; ring E represents a C5-C20 aromatic ring; Y1 and Y2 are respectively, independently and respectively N or B, and X1, X2, X3 and X4 are respectively, independently and respectively NR1, BR2, O or S. When the compound provided by the invention is used asthe luminescent material in an OLED device, excellent device performance and stability are shown. The invention also discloses an organic light-emitting device adopting the compound with the general formula.