18results about How to "Small driving current" patented technology

The invention relates to an input voltage power failure locking and startup and shutdown instruction control circuit and a working method thereof. The circuit comprises a short circuit protection unit, a surge suppression unit, an EMI filtering unit, a DC / DC conversion unit, an output filtering unit and a control circuit unit. The control circuit unit comprises an input bus power failure locking unit, a shutdown control instruction unit, a startup control instruction unit and a startup and shutdown state locking unit. The method is suitable for a power supply and distribution system in aerospace electronic equipment, and can be widely applied to other various power supply and distribution systems which work reliably for a long time. According to the method, the reliability of pulse instruction control on and off of the power supply and distribution system in the electronic equipment for space navigation can be guaranteed, when the primary input bus voltage breaks down or returns to normal, the power supply can be effectively in the off state, the effective on and off instruction can be retransmitted through the platform, and it is guaranteed that the system is reliably restarted and operated.

The invention discloses a light-emitting element, and the element comprises an LED chip which is provided with a first surface, a second surface opposite to the first surface, and a side wall connected with the first surface and the second surface. The wavelength conversion layer is at least arranged on the first surface of the LED chip; the electrode expansion structure is arranged on the second surface of the LED chip; the packaging layer at least surrounds the LED chip, the wavelength conversion layer and the electrode expansion structure; and at least one functional structure module selected from the group consisting of the following structure modules. The method can flexibly adapt to different application scenes.

The utility model relates to a kind of integrated pump valve drive's electronic controller powered by 48V, it is related to the field of automotive electronics, and electronic controller is equipped with 48V direct current total power input end, and electronic controller includes: pump motor drive module, connects 48V direct current total power input end;First DCDC step-down circuit one, connects 48V direct current total power input end, and output end outputs medium voltage power supply one;Solenoid valve drive module, connects medium voltage power supply one;Second DCDC step-down circuit, connects 48V direct current total power input end, and output end outputs medium voltage power supply two;Second low voltage supply circuit, connects medium voltage power supply two, and output end outputs low voltage supply;Microcontroller module, connects low voltage supply, and control signal connects pump motor drive module and solenoid valve drive module;Communication interface module, with microcontroller module two-way signal connection.The utility model realizes 48V power supply under high-power pump motor drive efficiency and multi-channel solenoid valve comprehensive optimization by differentiating power architecture.

This application discloses a display panel and its driving method and display device, relating to the field of display technology. After the display panel enters a first display mode, the total duration H1 of the light emission control signal being at the enable level in the m light emission holding frames of the first screen refresh frame is set to be less than the total duration H2 of the light emission control signal being at the enable level in the m light emission holding frames of the second screen refresh frame, thereby reducing the light emission duration of the first screen refresh frame, and / or, the bias voltage signal DVH1 corresponding to the x-th light emission holding frame in the first screen refresh frame is set to be greater than the bias voltage signal DVH2 corresponding to the x-th light emission holding frame in the second screen refresh frame, thereby reducing the driving current of the driving transistor in the pixel circuit; thereby reducing the brightness of the first screen refresh frame, weakening the brightness jitter of the first screen refresh frame, improving the brightness consistency of the display panel in timing, and thus improving the display effect.

A gate drive circuit adapted to high junction temperature environments, and its turn-on and turn-off methods, are disclosed. The gate drive circuit includes a main three-terminal transistor, a turn-off circuit, and an auxiliary circuit. The added auxiliary circuit generates an auxiliary current signal, either in the same direction or opposite to the control signal current, to the control electrode of the main three-terminal transistor during the turn-on and turn-off processes within a preset time period. This disclosure enables the generation of corresponding positive or negative auxiliary current signals at the control electrode of the three-terminal transistor. During the conduction process, the auxiliary circuit can generate a reverse auxiliary current signal at the control electrode of the three-terminal transistor during the current rise phase, reducing the drive current of the turn-on signal to decrease di. d / dt, suppressing the turn-on current; during the turn-off process, the auxiliary circuit can generate a unidirectional auxiliary current signal at the control electrode of the three-terminal transistor in the current-decreasing segment, increasing the drive current of the turn-off signal and accelerating the turn-off speed.

The invention discloses an improved self-powered power supply driving circuit and a chip. In a pre-turn-off stage of a turn-on period, a current sampling switch tube is turned off and a charging switch tube is turned on, so that current flowing through a driving tube is led out to an energy storage circuit for charging; the charging opportunity is selected in the pre-turn-off stage of the conduction period, the normal switching period of the driving tube and the normal output of energy cannot be influenced, the self-charging can be realized without the help of an external winding, and the defects of many processes, power consumption and cost of charging of an auxiliary winding are overcome; when the driving tube is realized by adopting a Darlington tube, the amplification factor is larger, the required driving current is smaller, better conversion efficiency can be achieved, enough time is provided for charging the energy storage circuit at the primary side conduction stage after pre-turn-off, and the same output power is realized at lower cost. Appropriate charging current is selected according to the voltage on the output feedback voltage pin, the maximum voltage value in the chip is reduced, and the chip is prevented from being damaged.

A display device according to an example of the present disclosure includes a substrate in which a light emitting region and a non-light emitting region are divided and a plurality of sub-pixels are defined, an insulating layer disposed above the substrate, a first electrode disposed in each of the plurality of sub-pixels, a bank disposed on the insulating layer and exposing the first electrode through an opening thereof, an organic layer disposed on the first electrode, and a second electrode disposed on the organic layer. The bank includes an exposed side obtained by removing one region between the plurality of sub-pixels and an undercut structure inward from a lower end of the exposed side. The bank further includes an exposed side obtained by removing one region between the plurality of sub-pixels and a trench structure obtained by removing a portion of a thickness of the insulating layer.

A control method for hard commutation of a motor belongs to the field of electronic technology and motor control, and is characterized in that real-time monitoring analysis and control are carried out on the duty ratio of speed regulation PWM (Pulse Width Modulation); when the duty ratio of the speed regulation PWM is larger than a preset threshold, the motor driving controller is switched to a lower arm MOS PWM mode from a lower arm MOS normally-on mode; and delaying the closing of the lower arm PWM, so that the closing of the lower arm MOS switching tube is delayed by one or more time periods compared with the closing of the upper arm MOS switching tube. The drive current obtained from the bus during hard commutation of the motor drive controller can be effectively reduced, the conduction pressure of a three-phase bridge lower arm MOS switch tube is reduced, and energy consumed from the bus during commutation of the drive controller can be supplemented in time through energy feedback.

The present application provides a complementary metal oxide semiconductor (CMOS) field effect device, comprising a substrate; a first n-type doped S / D region and a second n-type doped S / D region; a first p-type doped S / D region and a second p-type doped S / D region; a first channel layer disposed above the substrate, the first channel layer comprising a first sub-layer and a second sub-layer; wherein the first and second n-type doped S / D regions are disposed on a first side of the first channel layer, and the first and second p-type doped S / D regions are disposed on a second side of the first channel layer, the second side being opposite to the first side; wherein an energy of a conduction band edge of the first sub-layer is lower than an energy of a conduction band edge of the second sub-layer; and wherein an energy of a valence band edge of the first sub-layer is lower than an energy of a valence band edge of the second sub-layer; and a gate structure adjacent to the first sub-layer and the second sub-layer of the first channel layer.

The invention relates to a transient TTL signal switch control circuit and a working method thereof. The circuit comprises a channel opening control unit, a channel closing control unit and a control signal output unit. The channel opening control unit comprises a photoelectric coupler N1; the photoelectric coupler N1 comprises a first light emitting diode and a first phototriode; the channel closing control unit comprises a photoelectric coupler N2; the photoelectric coupler N2 comprises a second light emitting diode and a second phototriode; the control signal output unit comprises a triode V5, a triode V6, a triode V7, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a resistor R11. Compared with a magnetic latching relay control circuit, the magnetic latching relay control circuit not only can realize a channel opening / closing function, but also has the advantages of small driving current, smooth opening / closing instant voltage and current, no peak and the like.

The application relates to a method, device, system and equipment for automatically regulating the running current of a projector light source. The method automatically regulates the running current of the projector light source according to the curve change rate of a brightness change curve to determine whether the projector light source is working in a similar saturation state. The driving current of the projector light source working in the similar saturation state is adjusted, that is, the corresponding driving current is matched according to the actual brightness value of the projector, the driving current of the projector light source working in the similar saturation state is reduced, the projector light source is prevented from working in the similar saturation state, the electro-optical conversion efficiency of the projector light source is kept in a high state, the energy consumption of the projector is reduced, the heat generated by the projector light source is reduced, the service life of the projector is prolonged, and the problem that the projector with multiple light sources in parallel working in the similar saturation state after a fault occurs, the output current cannot be adjusted according to the working light source, and the service life of the projector is reduced is solved.

The invention discloses a light-emitting assembly, a preparation method thereof and a display panel, and relates to the technical field of display. The laminating directions of film layers in a first light-emitting diode and a second light-emitting diode included in a light-emitting unit in the light-emitting assembly are opposite, so that the first light-emitting diode and the second light-emitting diode are conveniently connected in series through a first connecting electrode. Moreover, the two light-emitting diodes of the light-emitting unit are connected in series, so that the voltage of the light-emitting unit can be improved, the driving current provided for the light-emitting unit can be further reduced, and the power consumption of the display panel is prevented from being too high. Moreover, the power consumption of the display panel is low, so that the temperature in the display panel is not too high, and the reliability of the display panel can be ensured.

This surface-emitting laser element is provided with: a first semiconductor layer provided on a translucent substrate; an active layer on the first semiconductor layer; a second semiconductor layer on the active layer; a photonic crystal layer which is included in the first semiconductor layer and which has pores arranged in a two-dimensional periodic manner in a plane parallel to the active layer; and a light reflecting layer provided on the second semiconductor layer and having a reflecting surface. The back surface of the substrate has a light emission surface, the photonic crystal layer has a diffraction surface which is a wave source when fixed light is diffracted in a direction orthogonal to the photonic crystal layer, and the distance between the diffraction surface and the reflection surface is set so that the light emission surface is substantially equal to the light emission surface. The light intensity of interference light generated by interference between first diffracted light diffracted from the diffraction surface to the light emission surface side and second diffracted light diffracted from the diffraction surface to the light reflection layer side and reflected by the reflection surface is made smaller than the light intensity of the first diffracted light.

The invention discloses a display driving circuit and display screen energy-saving equipment, and relates to the technical field of display equipment, and the circuit comprises a first power supply module which is connected to the anode of a red light-emitting diode in an LED display unit and is used for providing a first working voltage for the red light-emitting diode; the second power supply module is connected with the anode of a green light emitting diode and the anode of a blue light emitting diode in the LED display unit and used for providing second working voltage for the green light emitting diode and the blue light emitting diode, and the first working voltage is smaller than the second working voltage; the driving module is connected with the cathode of the red light-emitting diode, the cathode of the green light-emitting diode and the cathode of the blue light-emitting diode, and is used for providing driving current for the red light-emitting diode, the green light-emitting diode and the blue light-emitting diode. The row selection module is connected with the row selection end of each LED display unit through a plurality of row selection lines, and is used for sequentially gating each LED display unit in a preset scanning period.

The invention provides a static memory. The static memory comprises a plurality of memory elements arranged in an array; a word line; a first transmission line and a second transmission line connected to the plurality of memory cells located in the same column; the memory cell includes: a first transistor coupled to a first node, a first power line, and a second node, respectively; a second transistor coupled to the second node, the first power line, and the first node, respectively; a third transistor coupled to the first node, the second node, and a second power line, respectively; a fourth transistor coupled to the second node, the first node, and a second power line, respectively; the fifth transistor is respectively coupled with the word line, the second node and the first transmission line, and the fifth transistor is a PMOS (P-channel Metal Oxide Semiconductor); and the sixth transistor is respectively coupled with the word line, the first node and the second transmission line, and the sixth transistor is a PMOS (P-channel Metal Oxide Semiconductor). According to the SRAM disclosed by the invention, a read-write path is changed, and a pull-down tube can be prepared by adopting an oxide transistor.

The invention discloses a magnetic suspension impeller capable of reducing stirring resistance, which comprises a two-pole magnet, a shell and a plurality of blades, and is characterized in that the shell is used for covering the two-pole magnet; first wave-making teeth and second wave-making teeth are symmetrically arranged at the front ends of the blades; the upper ends of the first wave-making teeth are provided with first protruding parts, and the lower ends of the second wave-making teeth are provided with second protruding parts. A first flow channel is formed between the first protruding part and the blade, and a second flow channel is formed between the second protruding part and the blade. The invention also discloses a bioreactor which comprises the magnetic suspension impeller for reducing the stirring resistance in the previous embodiment. The liquid mixing device is used in a liquid mixing system in the field of biopharmacy, and realizes the function of quickly and effectively mixing materials such as a culture medium and a buffer solution uniformly; during operation, the impeller can well eliminate wave-making resistance, and the operation stability of the impeller can also be improved; meanwhile, the driving current of the motor can be reduced, and electric energy consumption is reduced.

The utility model relates to the technical field of environmental protection equipment, concretely relates to a mud scraping subassembly, include: the mud scraping board of length extension, including the stainless steel square tube of inside hollow, and the both ends of stainless steel square tube are sealed state, set up in the both ends of mud scraping board's mobile guide pulley, the mobile guide pulley distributes in mud scraping board's two sides, the rotation axis of mobile guide pulley is with the length direction parallel of mud scraping board, the diameter of mobile guide pulley is greater than the width of mud scraping board, the mobile guide pulley slightly protrudes in the both ends of mud scraping board along its width direction.

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an electromagnetic system and a direct-current switch. The electromagnetic system comprises a static iron core. The at least two groups of electromagnetic driving units are arranged on the static iron core; the first end of the connecting column is connected with the static iron core, and the second end of the connecting column penetrates through the electromagnetic driving unit and extends out; the magnet yoke sheet is connected with the second end of the connecting column; one end of the elastic piece is embedded in the magnet yoke piece; and one end, far away from the magnet yoke piece, of the elastic piece is embedded in the movable iron core. According to the utility model, the lower end of the movable iron core is not additionally provided with a guide part, so that the overall mass of the movable iron core is reduced, the driving current required by the electromagnetic driving unit is reduced, and the electromagnetic system can be directly started by adopting a PLC (Programmable Logic Controller).