41results about How to "Reduce instantaneous current" patented technology

A liquid crystal display. The liquid crystal display having a power device, a display unit array, a scan driver, a selection device, and a current limiting device. In normal operation of the liquid crystal display, according to the operation of the selection device, a voltage signal applied from the power device is directly applied to the scan driver according to the selection device, and the scan driver sequentially outputs scan signals to scan electrodes. During shutdown and power on processes of the liquid crystal display, according to the operation of the selection device, the voltage signal applied from the power device is applied to the scan driver through the current limiting device, limiting the instantaneous current from the power device. Moreover, the scan driver simultaneously outputs all the scan signals to erase charges within all the display units.

The present invention discloses a serial transmission device for reducing instantaneous current including an input terminal for receiving serial data, a coding module coupled to the receiving terminal comprising a plurality of coding units in series for transforming the serial data to a plurality of coding results according to a plurality of coding schemes, and a plurality of output terminals respectively coupled to the plurality of coding units of the coding module for outputting the plurality of coding results.

The invention discloses an elevator control device. The input terminal of the rectifier is connected with an external AC power supply, and the output DC voltage is sent to the input terminal of the inverter; the inverter converts the DC voltage at the input terminal into an AC voltage to supply power for the motor; The high-voltage end of the inverter is connected to the input end of the inverter; the second contactor is connected between the low-voltage end of the DC converter and the accumulator; the buffer capacitor is arranged between the DC converter and the second contactor, and the two ends of the buffer capacitor are respectively Connect the positive and negative ends of the low-voltage side of the DC converter. The elevator control device of the present invention has low cost.

The invention provides a voltage level conversion circuit and a display panel driving control method. The voltage level conversion circuit is coupled to a plurality of data lines in the display panel through a multiplexer. The voltage level conversion circuit includes a voltage level conversion unit and a control unit. The voltage level conversion unit is coupled to the multiplexer and receives the first voltage level, the second voltage level and the third voltage level respectively, wherein the third voltage level is higher than the second voltage level and the second voltage level above the first voltage level. The control unit is coupled to the voltage level conversion unit for selectively controlling the voltage level conversion unit to output the first voltage level or the second voltage level to the multiplexer according to the voltage level of the timing control signal.

In an electrochemical sensor, the potential difference applied to electrochemical batteries is increased at a certain ratio to reduce the transient current.

The invention discloses a Braille convex-concave point control structure, comprising a character post rod, a rod projection, an active board and a control device thereof, and a character post rod motion control device. The rod projection is connected at the lower end of the character post rod which moves up and down through the driving of the character post rod motion control device and the rod projection; the active board is perpendicular to the character post rod, the bottom layer of the active board is provided with a groove; the active board is controlled to translate, and the rod projection enters the groove to drive the character post rod to move up and down. The invention also discloses a progressive full-page driving Braille display, comprising a plurality of square modules each of which is composed of 6 Braille convex-concave point control structures, wherein the structure is arranged in a mode of 3 rows * 2 columns mode; the active boards of the Braille convex-concave point control structures of the square modules in the same line are connected to form an active lath moving together, a waist hole corresponding to the character post rod is arranged on the active lath; in the square modules in the same column, the electromagnetic assemblies of a first Braille convex-concave point control structure, a second Braille convex-concave point control structure and a third Braille convex-concave point control structure in the same column of the square modules are respectively connected to a first driving wire, a second driving wire and a third driving wire which are identical.

The invention discloses a lightning-stroke-resisting protective element. The lightning-stroke-resisting protective element comprises a fuse, two electrodes electrically connected with the two ends of the fuse, and an insulator that is connected with the two electrodes and used for supporting the two electrodes concurrently, wherein at least a metal anti-thunder structure is arranged on the insulator for receiving charge deposition. When lightning stroke voltage appears at the two ends of the lightning-stroke-resisting protective element, the lightning stroke voltage instantly causes air breakdown to enable charges to be deposited on the metal anti-thunder structure so as to greatly lower instantaneous current passing through the protective element fuse in order to prevent the protective element fuse from being fused under the lightning stroke state.

The invention discloses a circuit and an electrical appliance for controlling a high-power load by means of thyristor isolation in a flyback power supply, including a high-frequency transformer, an absorbing circuit, a secondary output circuit, an auxiliary power supply circuit, a drive circuit and a thyristor; the auxiliary power supply The circuit is connected to the high-frequency transformer, and the two ends of the auxiliary power supply circuit are connected to the AC phase line input and the analog ground; the output end of the drive circuit is connected to the G pole of the thyristor, which is used to control the conduction of the thyristor. When the flyback power supply starts, the auxiliary power supply circuit has a continuous DC output; when the drive circuit is turned on, the thyristor has a DC input provided by the auxiliary power supply circuit, the purpose of the present invention The purpose is to provide a circuit that utilizes thyristor isolation to control high-power loads in a flyback power supply. An auxiliary power supply circuit is added to the circuit, which can directly provide trigger current for the conduction of the thyristor, and reduce the voltage loss when the thyristor is turned on. Instantaneous current or instantaneous voltage is conducive to passing the EMC test.

The invention mainly relates to a construction method for improving the percent of pass of double-block type concrete sleepers, in particular to a construction method which is applied to a sleeper structure and used for prefabricating and constructing the double-block type concrete sleepers with stopping shoulders. The construction method includes the steps that internal stress of steel bars is eliminated after the steel bars are made to stand still for a certain period of time; by adjusting the arch bending height and increasing welding points, the instantaneous welding current is reduced, the thermal distortion range of the welding points is reduced, and mold cleaning and quality control over and improvement to spraying of release agents are perfected; the impact force generated when the sleeper is demolded is reduced. The construction method has the advantages that the stress generated in the steel bar cold rolling process is effectively removed, the instantaneous welding current is reduced by increasing the welding points, and therefore the thermal distortion range of the welding portions is reduced, it is avoided that the welding points break away from the welding portions, the impact force generated when the sleeper is demolded is reduced, and the quality of the sleeper is guaranteed.

The embodiment of the present invention provides a multi-channel switching circuit and switching method, including: a multiplexing switch matrix, the control terminal of the multiplexing switch matrix is ​​connected to a controller; the multiplexing switch matrix includes a plurality of multiplexing Using a switch, each output channel of each multiplexing switch is respectively connected to a sensor circuit; the common end of each multiplexing switch is respectively connected to the first input end of the signal detection circuit; the output end of the signal detection circuit is connected to the control device, the second input end of the signal detection circuit is connected to the output end of the digital-to-analog converter DAC; the input end of the digital-to-analog converter DAC is connected to the controller; the controller is used to control the digital-to-analog conversion when the multiplexing switch switches the output channel The DAC adjusts the bias voltage applied to the input channel of the multiplexing switch according to a preset gradient function. According to the switching circuit of the embodiment of the present invention, the instantaneous current and voltage generated during channel switching can be reduced, thereby reducing the influence on adjacent channels.