204results about How to "Reduce standby power consumption" patented technology

Power is taken out from radio waves through an antenna and a power receiving unit. A signal receiver, a comparator, and an ID signal holder are operated with the taken-out power to compare an ID contained in a received signal with an ID read out from the ID signal holder. When both the ID's are matched with each other, a switch for a main power source is turned on. In trying to remotely operate household electrical appliances by utilizing the Internet that has become increasingly popular, standby power is consumed if the electrical appliances are kept in a standby state at all times. Since power is taken out from radio waves, the invention is able to cut the standby power in an environment where the radio waves are transferred via radio communication that is expected to be more and more prevalent in future.

A packet relay device determines a port to be placed on standby in a link aggregation, determines whether there is an active port among ports belonging to redundant network interfaces, and, if a network interface has no active port, places the network interface on standby. The packet relay device monitors whether a failure has occurred in an active network interface and, if a failure is detected, activates a standby network interface and places the failed network interface on standby.

The invention discloses an Internet of Things intelligent control method and an Internet of Things intelligent control system based on user perception. The Internet of Things intelligent control method is characterized in that all users in a target area can be identified, and according to preset user priority levels, the user having the highest priority level is defined as the target user, and then the control parameters corresponding to the target user can be acquired, and the working state of the specified Internet of Things device can be controlled according to the control parameters; the Internet of Things intelligent control system comprises a user perception module, a target user selection module, a control parameter acquisition module, and a device control module. Various Internet of Things devices in the room are provided with the capability of perceiving the users, and can be used to provide the services to the users automatically based on the own responsibilities and functions according to the moving conditions of the users, and then the irrelevant relation between the working conditions of various devices in the room and the moving conditions of the users can be changed, and the living quality of the people can be improved.

A charger has two pins for connecting with a battery therebetween, and an apparatus and method are proposed to determine to wake up or turn off the charger according to a voltage or a current detected from the two pins, to reduce the standby power consumption of the charger.

A low-dropout (LDO) voltage regulator that includes an error amplifier which compares a reference voltage with a feedback voltage of an output voltage and outputs an error signal based on the result of the comparison, the error amplifier being biased by an input voltage; a first MOS transistor having a gate electrically connected to the error signal, a source electrically connected to the input voltage and a drain electrically connected to the output voltage; a voltage divider which transmits a predetermined part of the output voltage to the error amplifier as feedback voltage; and a level limiter which limits a level of the output voltage from changing beyond and below an offset voltage when a level of a load current changes. In accordance with embodiments, A predetermined number of comparators and MOS transistor type-switches are provided to enhance the slew ratio of the regulated output voltage and to reduce standby electricity consumption.

A display includes a power supply system using a power controller to switch a power switch to control power delivery, and an image scalar receiving a supply voltage and a supply current from the power supply system. An apparatus and method are proposed to determine a control signal in a standby mode by monitoring the supply voltage or the supply current, to wake up or turn off the power controller to reduce the switching times of the power switch in the standby mode, thereby reducing the switching loss of the power switch and the standby power consumption of the display.

System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and adjust the input current for the power converter. The threshold signal is associated with a threshold magnitude as a function of time. The threshold magnitude increases with time at a first slope during a first period, and the threshold magnitude increases with time at a second slope during a second period. The first slope and the second slope are different.

An isolated power converter, an inverting type shunt regulator, and an operating method thereof are disclosed. The isolated power converter includes a transformer, an inverting type shunt regulator, a controller, and an optocoupler. The inverting type shunt regulator is located on the secondary side of the transformer. The inverting type shunt regulator includes an error amplifier and a MOSFET. The controller is located on the primary side of the transformer. The controller includes an inverting unit cooperated with the MOSFET. The controller receives a feedback voltage. The optocoupler is coupled to the inverting type shunt regulator and the controller to provide an opto-coupling current to the controller.

The invention relates to startup and shutdown technology of electronic products, in particular to a startup and shutdown circuit. The startup and shutdown circuit comprises a startup and shutdown key, a system main control chip, a hard startup circuit, a soft shutdown circuit, a forced shutdown circuit and a system power supply, wherein the hard startup circuit, the soft shutdown circuit, the forced shutdown circuit and the system power supply are all formed by discrete components. The hard startup circuit, the soft shutdown circuit and the input end of the forced shutdown circuit are all connected with the startup and shutdown key. The output end of the hard startup circuit is connected with the system power supply, the output ends of the soft shutdown circuit and the forced shutdown circuit are connected with the system power supply through the hard startup circuit, and the soft shutdown circuit is further connected with the system main control chip. The startup and shutdown circuit is composed of all discrete components and is simple and low in standby power consumption and cost compared with startup and shutdown circuits controlled by an advanced reduced instruction set computer machine (ARM)/micro controller unit (MCU)/Super input/output (IO)/electronic computer (EC)/south bridge chip. Simultaneously the startup and shutdown circuit has high circuit reliability, can achieve a startup and shutdown control method same as that of x86 platform products (personal computer (PC) and Notebook) under the condition of non-x86 platform products, and increases a new user experience effect.

A portable radio telephone handset includes the capability of operating as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation are available in the handset, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode. A paging function for incoming analog cellular communication is carried out on a CDPD channel. The handset distinguishes between paging signals identifying CDPD mode communications and paging signals identifying analog cellular communications. The handset automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. To maintain the security of the handset ID, AMPS communications can be set up and controlled using CDPD control channels.

The invention discloses a chip extra-low in standby power consumption. The chip comprises a standby normally open area circuit, a digital core area circuit, a real-time clock circuit and a level converting circuit, wherein the real-time clock circuit employs a first power source, while the digital core area circuit and the standby normally open area circuit employ a second power source; the standby normally open area circuit is used for processing a wake-up request in the standby mode to wake up the chip so that the chip enters the working mode; the digital core area circuit is the core of the chip and works normally in the working mode; and the real-time clock circuit completes system clock maintenance and is used for generating continuous interruptions, and still works normally in the standby mode. The chip extra-low in standby power consumption can provide a small-scale standby circuit.

The invention discloses a microwave induction control method and a microwave induction control device and relates to the technical field of application of microwave sensors. According to the method, an action system for judging whether persons enter or leave the scene or not is established by using the Doppler effect through the microwave induction control device; a switch of a power supply of an electrical appliance is controlled by identifying the action that human bodies enter or leave the scene; the microwave induction control device adopted by the method can be arranged inside the electrical appliance, so that the electrical appliance adopts a closed structure, and moisture resistance and electric shock prevention can be realized. In addition, according to the method, the action whether the human bodies leave or not can be identified, and the power supply of the electrical appliance is automatically closed when the human bodies leave the detection range and no person exist in the detection range. Besides, the device is low in power consumption; when the device is installed on the electrical appliance for use, the standby power consumption of the electrical appliance can be greatly reduced, and further the aims of saving energy and electricity are achieved.

The invention discloses a system for realizing standby and awakening of a set top box by utilizing a singlechip, comprising a microcontroller, an RTC (Real Time Clock) clock chip, a state indication module and a controllable power supply, wherein the microcontroller detects whether a power on/off signal returned by the set top box or an RTC timing awake signal sent by the RTC clock chip is available or not; if the power on signal is available, the microcontroller controls the controllable power supply to supply electricity to a control mainboard of the set top box; the set top box further judges that where the signal comes from and performs corresponding action so as to realize video output or backstage downloading of the set top box; and once the microcontroller detects the power off signal, the set top box writes the timing time to the RTC clock chip, the microcontroller controls the controllable power supply to cut off electricity for each module on the control mainboard of the set top box. The system has lower standby power consumption and can ensure that the effective service life of the set top box is prolonged. Because the system has simple structure and low cost, and is convenient for production and alternation of the prior art, the system is suitable for wide popularization in the field of the set top box.

The invention provides a high voltage starting circuit applied to an AC/DC converter, which comprises a constant current circuit and a constant current switching-off circuit, wherein the constant current circuit is used for setting a constant current in a negative feedback control way, and charging an external capacitor (Cext) of a power voltage (VCC) of the AC/DC converter by utilizing the constant current; and the constant current switching-off circuit is used for switching the constant current circuit off and stopping charging the external capacitor (Cext) when the power voltage (VCC) rises to a starting threshold UVLO_OFF, and switching the constant current circuit on and starting charging the external capacitor (Cext) when the power voltage (VCC) drops to a switching-off threshold UVLO_ON. The high voltage starting circuit can effectively reduce the standby loss of the AC/DC converter at the same time of accelerating the starting of the AC/DC converter.

The invention relates to a power supply control system of an electric automobile. The system comprises a CAN transceiver, an MCU control chip, a monitoring interface and a power supply control circuit; the power supply control circuit comprises a storage battery, a first power supply source and a second power supply source; the first power supply source is used for converting the voltage of a storage battery into working voltage of the MCU control chip, the monitoring interface and the CAN transceiver to be outputted; when the electric automobile is off, the MCU control chip is awakened through external signals received by the monitoring interface and the CAN transceiver; the second power supply source is used for converting the voltage of the storage battery into working voltage to be outputted to a peripheral electrode when the MCU control chip is awakened. According to the power supply control system of the electric automobile, the first power supply source supplies power to some circuit when the automobile is in an off state, and the second power supply source supplies power to other circuits under the awakening state, so that the normal use of the electric automobile can be ensured, and the power consumption of the electric automobile under a non-working state can be greatly decreased.

The invention relates to a weak-current power supply system for a power control unit (PCU) of an electric automobile, which comprises a storage cell, a usual power supply circuit and an unusual power supply circuit, wherein the storage cell supplies electricity to a minimum singlechipystem circuit of a vehicle control unit (VCU) module, a DI (discrete input)/DO (discrete output) unit circuit and a CAN communication interface circuit via the usual power supply circuit, and the storage cell supplies the electricity to an AI (analogue input)/AO (analogue output) unit circuit, a motor controller module, the relay group of the VCU module and a contactor of a high-voltage power distribution module via the unusual power supply circuit only when the switch of the electric automobile is turned off. According to the weak-current power supply system, the usual power supply circuit and the unusual power supply circuit are adopted to provide two power supply modes namely usual power supply and unusual power supply for PCU, and the electricity is supplied to partial circuits, which need to work, of the VCU module in standby when the switch of the electric automobile is turned off so as to ensure the awakening of the electric automobile, also reduce the standby power consumption to the greatest extent and solve the problem of long-time storage of the electric automobile. The weak-current power supply system is greatly convenient for use of a user, improves the rigid index of the electric automobile and is green and environment-friendly.

The invention provides an intelligent electric saving manager with low power consumption and a management method thereof, aiming at solving the technical problems that electric saving equipment has large power consumption and cannot be widely used so as to cause inconvenience for daily life. The technical scheme is as follows: a power supply circuit comprises a rectification filtering circuit, a pulse current control circuit and a transformer output circuit. The rectification filtering circuit transmits a commercial power supply signal to the pulse current control circuit after carrying out current limiting, rectifying and filtering on the commercial power supply signal; after pulse current is processed by the pulse current control circuit, voltage regulation is carried out on the pulse current with the help of the transformer output circuit, and then the pulse current is output to each power supply universal socket. The invention has the following advantages: by adopting the technical measure that current oscillation strictly controls internal resistance of a power supply in the power supply circuit, the invention reduces the power consumption of a product itself at the same time as solving the standby energy consumption of power utilizing equipment, so as to lead the static power consumption of the product to be controlled within 0.1W, thereby realizing the electric saving of the electric saving product in the true sense.

The invention belongs to the technical field of vehicle inspection, and particularly relates to a vehicle data analysis system. The vehicle data analysis system comprises a vehicle-mounted data collecting module and mobile terminal equipment. The vehicle-mounted data collecting module comprises a core processor, a non-volatile storage module, a Bluetooth low-power-consumption module supporting a 4.0 or higher version, and the core processor can collect and process data related to vehicles in real time through an interface of a vehicle-mounted diagnostic system for the vehicles. Bluetooth wireless connection between the mobile terminal equipment and the Bluetooth low-power-consumption module can be in a connected state or a disconnected state, when the Bluetooth wireless connection is in the disconnected state, the vehicle-mounted data collecting module will store the data which are collected and processed by the core processor in real time and related to the vehicles in the non-volatile storage module, and when the Bluetooth wireless connection is in the connected state, the vehicle-mounted data collecting module will transmit the data which are collected and processed by the core processor in real time and related to the vehicles to the mobile terminal equipment in real time and transmit the data which are related to the vehicles and stored in the non-volatile storage module to the mobile terminal equipment.

An upper heat roller with an external heat source and a lower heat roller with an internal heat source are arranged with a paper transport path therebetween, in such a manner as to be pressed against each other. The lower heat roller is heated sufficiently, thereby supplying a paper sheet with sufficient heat when the paper sheet is transported through a contact region between the upper and lower heat rollers to be heated.

The disclosed device for standby process of mobile terminal comprises a baseband processor for calling, a MPU to send correction signal and wake-up signal to processor periodically. Wherein, the processor corrects self clock with correction signal from MPU on standby calling; it closes self inner clock once calling end; when receiving wake-up signal, it start up self clock for calling. This invention can reduce terminal power consumption and prolongs standby time.

A self-powered combustion control system having a burner and a fuel supply control valve connected with the burner. The fuel supply control valve includes ignition and hold solenoids arranged whereby energizing the ignition solenoid causes the hold solenoid to transform from a closed disposition in which no fuel passes to the burner to an open disposition in which fuel flow to the burner is initiated for igniting the burner and subsequently maintained during heating of the material to be heated. An electronic system controller is provided for controlling the ignition solenoid and an unpowered rechargeable energy storage device is provided for all of the power required to operate the combustion control system.

The invention discloses a battery management system with low standby power consumption and a battery management system awaking method. The battery management system comprises a power supply, an isolation power supply module, a communication module, a communication bus, a communication isolation module, a control center, a power supply switch module and a communication bus level detection module, wherein the battery management system is in standby, the power supply switch module is disconnected by the control center; the communication bus level detection module detects the level signal of the communication bus; if level signal change of the communication bus is detected, an awakening signal is output to the control center; and the control center receives the awakening signal, awakens the battery management system and switches on the power supply switch module. The power supply switch module is disconnected when the battery management system is in standby, so that the power supply isolation module, the communication module and the communication isolation module are power off in a resting mode when the battery management system is in standby; and therefore, the standby power consumption of the battery management system is lowered and the standby time of the battery is prolonged.

The invention discloses a power supply controller. The power supply controller comprises a main power supply device, a main chip and a signal receiving device. The power supply controller also comprises an auxiliary power supply device, a switching device, a voltage detection device, wherein the switching device is connected with the main power supply device, the main chip and the auxiliary power supply device and is used for receiving the control signal of the main chip and switching the power source of the main chip; and the voltage detection device is connected between the main chip and the auxiliary power supply device and is used for detecting the voltage of the auxiliary power supply device. When the power supply controller receives a shutdown instruction, the main chip can transmit the signal to the switching device according to the shutdown instruction so as to make the auxiliary power supply device power the main chip, the main power supply device is in an idling or underload state at the time. In addition, the energy in the auxiliary power supply device detected by the voltage detection device can be used for deciding whether the main power supply device is selected to supply energy to the auxiliary power supply device, thereby reducing the standby power consumption of an electric apparatus and saving the electric energy.

The invention relates to a high-power factor light-emitting diode driving circuit structure and belongs to the technical field of a circuit structure. A driving control circuit module of the high-power factor light-emitting diode driving circuit structure controls the duty cycle of a switch of a power pipe by converting a negative voltage signal of an auxiliary winding which is acquired by sampling through a negative voltage signal sampling end into a corresponding current signal to characterize the voltage of a bus, so that a current peak value envelope extracted by the high-power factor light-emitting diode driving circuit structure from an alternating-current voltage source is enveloped into a sine waveform and has the same phase as the voltage of the structure, a bus voltage sampling circuit is not required, a sampling input pipe pin of a control circuit is eliminated, the cost of the circuit structure is effectively reduced, the standby power consumption of the circuit is reduced, the volume miniaturization of a whole machine is facilitated, and the control on the decreasing of the area of the circuit and the enriching of the functions of the circuit are also facilitated. The high-power factor light-emitting diode driving circuit structure is relatively wide in application range.

The invention discloses a Bluetooth earphone and terminal connection method and system and a storage medium. The method comprises the steps: disconnecting Bluetooth connection between a Bluetooth earphone and a second terminal when the Bluetooth earphone receives a Bluetooth connection request for building Bluetooth connection with a first terminal and the Bluetooth earphone is currently connectedwith the second terminal; and establishing Bluetooth connection with the first terminal by adopting a corresponding Bluetooth connection mode according to the Bluetooth connection request type, configuring the Bluetooth connection request type to comprise a preemption connection request sent by the first terminal and an active switching connection request that is triggered by a user through the Bluetooth earphone and is used for establishing Bluetooth connection with the first terminal. Compared with the prior art, the connection stability and safety of the Bluetooth earphone are improved, and the standby power consumption and connection power consumption of the Bluetooth earphone are reduced.

The invention provides a low-drop-out voltage regulator. The voltage regulator comprises a power tube, an error amplifier, an operational amplifier, a control transistor and an output end VO. The source of the power tube is connected with the power supply end, the drain is connected with the output end VO, the grid is connected with the output end of the error amplifier, the first input end of the error amplifier is connected with the drain of the power tube, and the second input end of the error amplifier is connected with a first reference voltage. The first input end of the operational amplifier is connected with the output end VO, the second input end is connected with a second reference voltage, the output end is connected with the control end of the control transistor, one connection end of the control transistor is connected with the drain of the power tube, and the other grounding end of the control transistor is connected with the grounding end. Compared with the prior art, a second feedback loop is added to adjust the output voltage and offset leakage power of the power tube, and accordingly, the static current of the low-drop-out voltage regulator can be reduced.

The invention discloses a power supply circuit, a control chip, a switch power supply system and a power supply method. The power supply circuit comprises a control unit, a switch unit, a capacitor and an MOS transistor, wherein the control unit is electrically connected with the input end of the switch unit and the gate electrode of the MOS transistor for generating a voltage signal for conducting or cutting off the MOS transistor and/or a current signal for conducting or cutting off the switch unit; the input end of the switch unit is further electrically connected with the direct current voltage input end of the switch power supply system; the output end of the switch unit is electrically connected to the capacitor and the drain electrode of the MOS transistor; the source electrode of the MOS transistor is coupled to the load end of the switch power supply system, wherein when the MOS transistor and the switch unit are conducted, the switch power supply system supplies power to the load; and when the MOS transistor is cut off according to the cut-off voltage signal output by the control unit, the switch unit is cut off according to the cut-off current signal output by the control unit or the switch unit is cut off after the capacitor is charged for a certain time.

A switch mode power supply (SMPS) is capable of reducing standby power consumption, and includes a power factor capacitor (PFC) bulk capacitor which supplies power in a standby mode to constant loads by repeatedly charging and discharging a voltage, a PFC controller which controls the voltage to be charged in the PFC bulk capacitor, a first resistor and a second resistor which divide the voltage of the PFC bulk capacitor and output a reference voltage, and a control unit which controls the charging and discharging of the voltage of the PFC bulk capacitor in accordance with the reference voltage.

The invention discloses a charge pal switching implementation method and a charge pal. The method comprises the following steps: arranging a connection detecting module used for detecting whether a charged device is connected or not on the charge pal in advance and setting the connection between the connection detecting module and the charging switch of the charge pal; controlling the default state of the charging switch to be normally open; when the connection detecting module detects that the charged device is connected to the charging interface of the charge pal, controlling the charging switch to close to charge the charged device; and when the connection detecting module detects that the charged device is disconnected from the charging interface of the charge pal, controlling the charging switch to open. With adoption of the method, the charge pal can be switched on/off automatically according to the situation whether the charged device is connected or not, and moreover the standby energy consumption of the charge pal can be reduced.

The invention relates to a high-voltage power transmission line grounding fault indicating and positioning device, in particular to a pole and tower power transmission line fault indicator and belongs to the technical field of electric power tools. The pole and tower power transmission line fault indicator comprises a base, a current transformer and a control circuit board connected with a power source are arranged on the base, an MCU processor is welded to the control circuit board, the secondary current output end of the current transformer is connected with the signal input end of the MCU processor through a rectifying and filtering circuit and an amplifying circuit which are arranged on the control circuit board, the signal input end of the MCU processor is further connected with a photoresistor, the control output end of the MCU processor is respectively connected with a turnover indicator and an LED caution light, a semicircular shell is arranged above the base, a display window is arranged on the semicircular shell, and the display window corresponds to the turnover indicator, the LED caution light and the photoresistor which are arranged on the base. The pole and tower power transmission line fault indicator is simple in structure, the fault of a power transmission line can be fast and accurately positioned, the fault finding difficulty is reduced, the workload and the labor intensity of inspection personnel are reduced, and stable and reliable power supply is guaranteed.