Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

66results about How to "Impact size" patented technology

Pixel circuit and driving method thereof, electroluminescent display panel and display device

The invention discloses a pixel circuit and a driving method thereof, an electroluminescent display panel and a display device. The pixel circuit comprises an initialization module, a data writing-in module, a light emitting control module, a voltage storage module, a driving transistor, a first voltage maintaining module, a switch control module, an external compensation module and a light-emitting diode. The driving transistor is a double-gate transistor; and a second gate of the double-gate transistor is electrically connected with the external compensation module through the switch control module. Under the control of the switch control module, the external compensation module collects the voltage of a third node and then provides a compensation voltage for a second node so as to realize adjustment of the threshold voltage of the dual-gate transistor, so that the threshold voltage of the dual-gate transistor is close to a standard threshold voltage and the current of the light-emitting diode during light emitting is be independent of the threshold voltage. Therefore, a phenomenon that the current is affected by the drift of the threshold voltage is avoided; and the residual image is eliminated to improve the quality of the displayed picture.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD

Rotary exchanging method and rotary exchanging device for double workpiece platforms based on synchronous steering of turntable gear

The invention discloses a rotary exchanging method and a rotary exchanging device for double workpiece platforms based on synchronous steering of a turntable gear and belongs to semiconductor manufacturing equipment. The device comprises a rotary platform switching device consisting of a rotary motor stator, a rotary motor rotor, a rotating platform embedded in a base station and a rotary platform switching gear, wherein a liftable first shaft coupling device and a second shaft coupling device are arranged on the rotary platform; a first workpiece platform rotating shaft is arranged at the bottom of a first workpiece platform; a first workpiece platform switching device is arranged on the lateral surface of the first workpiece platform; a first workpiece platform gear is arranged at the waist part of the first workpiece platform; a second workpiece platform rotating shaft is arranged at the bottom of a second workpiece platform; a second workpiece platform switching device is arrangedon the lateral surface of the second workpiece platform; and a second workpiece platform gear is arranged at the waist part of the second workpiece platform. According to the rotary exchanging methodand the rotary exchanging device disclosed by the invention, in the switching process of double platforms, the orientations of the workpiece platforms are always kept unchanged and the problems that a cable in a traditional rotary platform switching scheme is not convenient to mount and an interferometer loses a target are solved; and meanwhile, the rotary exchanging method and the rotary exchanging device disclosed by the invention have the advantages that a rotational inertia in the specific implementation process is small, the required torque under the same platform switching time is smalland the like.
Owner:HARBIN INST OF TECH

Mutual inductor field wireless calibration instrument for 750kV substation

The invention discloses a mutual inductor field wireless calibration instrument for a 750kV substation. The mutual inductor field wireless calibration instrument comprises a main machine and an auxiliary machine, which are connected in a wireless mode and generate synchronous signals; the main machine is used for conditioning, collecting and carrying out A/D (analog/digital) conversion on the secondary signal of a standard mutual inductor, and transmitting a synchronous signal to the auxiliary machine; the main machine is also used for performing data operation processing on a digital signal of the standard mutual inductor, obtained from the A/D conversion, and a digital signal of a tested mutual inductor, transmitted by the auxiliary machine in the wireless mode, obtaining the comparison value and phase difference of the digital signals compared with each other, and displaying the comparison value and the phase difference; and the auxiliary machine is used for conditioning, collecting and carrying out A/D conversion on the secondary signal of the tested mutual inductor, and transmitting the digital signal of the tested mutual inductor after being subjected to A/D conversion to the main machine in the wireless mode after receiving the synchronous signal transmitted by the main machine. The mutual inductor field wireless calibration instrument for the 750kV substation can overcome the defects of great environmental influence, high fault rate and high error and the like in the prior art and realize the advantages of small environmental influence, high reliability and low error.
Owner:STATE GRID CORP OF CHINA +3

Bridge assembly type expansion joint device construction method

The invention relates to a bridge assembly type expansion joint device construction method which comprises the following steps that 1, a temporary supporting piece is built between the ends, close to each other, of two adjacent beam bodies used for building a bridge, wherein the temporary supporting piece comprises a supporting plate and two baffles arranged on the two opposite side walls of the supporting plate correspondingly; the two ends of the supporting plate extend to one ends of the two adjacent beam bodies correspondingly, the baffle is vertically arranged, the lower end of the baffle abuts against the upper surfaces of the beam bodies, and the supporting plate is provided with a positioning piece used for limiting the supporting plate from disengaging from the beam bodies; 2, concrete is poured on the upper surface of the beam body to form a concrete bridge floor, and a reserved groove used for installing an expansion joint device is formed in the beam body area corresponding to the supporting plate; and 3, after the concrete is solidified and cured, when the expansion joint device needs to be installed, positioning of the supporting plate by the positioning piece is canceled, the supporting plate is taken down, the reserved groove is cleaned, and then the expansion joint device is installed in the reserved groove. The method has the effect of improving the negative effect caused by grooving in the prior art.
Owner:湖南发通路桥集团有限公司

Manufacturing method of silicon carbide carrying disc for plasma etching and silicon carbide carrying disc

The invention belongs to the technical field of carrying discs, and particularly relates to a manufacturing method of a silicon carbide carrying disc for plasma etching and the silicon carbide carrying disc. The manufacturing method of the silicon carbide carrying disc comprises the following steps of (1) forming a plain blank, namely forming the silicon carbide plain blank meeting the size requirement by adopting silicon carbide granulation powder of a solid-phase sintering system through a process of firstly performing dry pressing and then performing isostatic pressing or directly performing isostatic pressing, (2) plain blank processing: according to the finished product size and the high-temperature sintering shrinkage rate of the plasma etching carrier disc, reserving certain sintering allowance for the outer circle, the total thickness and the groove depth of the front and back surfaces, and processing the formed plain blank, (3) high-temperature sintering: carrying out high-temperature sintering on the processed silicon carbide carrier plate blank, (4) finish machining: performing precision grinding and plane grinding on the outer circle of the carrying disc, and then machining the reverse side of the carrying disc by taking the groove depth of the reverse side as a reference, processing the front surface of the carrying disc by taking the total thickness requirement of the carrying disc as a reference, and finally, precisely grinding the wafer groove until the groove depth requirement is met.
Owner:NANTONG SANZER PRECISION CERAMICS CO LTD

Three-dimensional multi-station machining device for electronic parts

ActiveCN110355665ASatisfy the process processing methodMeet the needs of modern process technology environmentGrinding carriagesGrinding drivesEngineeringMachine tool
The invention relates to the related technical field of electronic science and technology, in particular to a three-dimensional multi-station machining device for electronic parts. The device comprises a machine tool, a transmission machine frame and an operation machine frame, the transmission machine frame is mounted on the machine tool, the operation machine frame is mounted on the transmissionmachine frame, the transmission machine frame and the side edge of the machine tool are movably mounted through a longitudinal transmission mechanism, a transverse transmission guide rail is arrangedon the transmission machine frame, a transverse sliding block is installed on the transverse transmission guide rail, a transverse transmission lead screw is installed in the transverse transmissionguide rail, the transverse sliding block is installed on the transverse transmission lead screw through threaded connection, the operation machine frame is installed on the transverse sliding block, the operation machine frame comprises a fine adjustment track and an operation cabinet, and the operation cabinet is installed on the fine adjustment track. According to the design, multiple stages oftransmission mechanisms are arranged and adjust the operation direction in a three-dimensional mode in the X-Y-Z-axis direction, and therefore the requirements of multi-station and multi-point streamline machining are met.
Owner:聊城西科自动化设备有限公司

Device for accurate measurement of micro deformation of composite rod for space

The invention provides a device for accurate measurement of micro deformation of a composite rod for space, and relates to the field of aerospace. The device solves the problems that an existing measuring method is low in measurement accuracy and cannot be used for effectively measuring micro deformation of a composite rod for space. The device comprises a steel ball made of 16-level-accurcy stainless steel materials and a straight joint made of invar steel materials with the linear expansion coefficient being zero; the two ends of the straight joint are of a first cylindrical structure and a second cylindrical structure respectively, the middle of the straight joint is of a square structure, the end of the first cylindrical structure is provided with a spherical groove for fixing the steel ball, and the spherical groove is the same as the steel ball in diameter; the diameter of the second cylindrical structure is in clearance fit with the inner diameter of the composite material rod, and the composite material rod is installed on the second cylindrical structure in a sleeved mode and connected together with the second cylindrical structure in a cementing mode. When the device is used for measuring the micro deformation of the composite rod, the repeatability is within 0.5 micrometer, and the measuring accuracy is high.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products