Abstract: The preset invention includes a circuit board wired to connect at least one common terminal and a plurality of signal terminals to form multiple instruction switches and an annular click member. Each of the instruction switches has an elastic contact element built with a return force. The circuit board has a plurality of displacement portions. The annular click member has actuating portions corresponding to and engageable with the displacement portions such that the annular click member is movable up and down relative to the circuit board to form a normal position and an instruction generating position. When the annular click member receives a force and is moved to the instruction generating position, a contact depresses the elastic contact element to store the return force When the force is released from the annular click member it is pushed by the return force of the elastic contact element to the normal position.

Abstract: A boost snubber circuit structure applied in a power supply having a boost circuit and a power conversion unit, wherein the boost circuit includes a boost unit connected to a switch element, a boost control unit for generating a driving signal to drive the switch element to control the charge/discharge of the boost unit, and a boost snubber unit for obtaining a voltage difference between a reference voltage and a detection signal and modulating the magnitude of the reference voltage or the detection signal to change the voltage difference and control the duration of outputting the driving signal. The voltage difference between the reference voltage and the detection signal determines the duration of outputting the driving signal. By controlling the voltage difference between the detection signal and the boost level, the invention prevents an occurrence of an inrush current caused by a too-large duration of generating the driving signal.

Abstract: A machine boot up protection structure for parallel power supply equipment provides a determination level to set the parallel power supply equipment in an ON condition. It has a control unit to receive a connection signal output by each of power supply units to compare with the determination level. If the comparison matches, all of the power supply units are activated to the ON condition. If the comparison does not match, all of the power supply units are set to an OFF condition. Thereby when the external power is not completely connected, some of the power supply units do not suffer from overloading and damaging.

Abstract: An LED regulation circuit and method include a voltage transformation unit to receive DC power and provide a constant current to drive at least one LED and a pulse-width modulation unit to generate a driving signal to control the voltage transformation unit. The driving signal of the pulse-width modulation unit has an operation period. In the operation period, the driving signal drives the voltage transformation unit to output regular operation power. The pulse-width modulation unit is connected to a timing regulation unit which generates a regulation signal sent to the pulse-width modulation unit to regulate the operation period of the driving signal by adding a sleep period. In the sleep period, the driving signal lowers the power of the voltage transformation unit that drives the LED. Through alternately controlling the operation period and sleep period of the driving signal, continuous heat generation and heat accumulation can be reduced.

Abstract: An input device includes an input module operated by a user to generate an input signal, a micro control unit, a memory unit having a plurality of preset protocol data fields, a Bluetooth driving unit, and a Bluetooth module. Each set of Bluetooth communication protocol codes stored in one protocol data field. The micro control unit is triggered by the input signal to output an output signal or an object switch signal. The Bluetooth driving unit is triggered by the object switch signal to access the Bluetooth communication protocol code from one protocol data field and send it to the Bluetooth module. The Bluetooth module receives the output signal and sends it to the linked information processing system, or receives the Bluetooth communication protocol code sent by the Bluetooth driving unit to establish a linkage with the information processing system corresponding to the Bluetooth communication protocol code.

Abstract: A power supply device of controlling feedback synchronization is connected to an electric power source for obtaining an input power and includes first and second converters for modulating the input power. The first and second converters include first and second output terminals for providing first and second output power respectively. The power supply device further includes a feedback synchronization unit electrically coupled to the first and second output terminals of the first and second converters for obtaining first and second feedback signals, and producing and transmitting a synchronous feedback signal to the second converter according to a voltage difference of the first and second feedback signals to synchronizing output voltage level of the second converter with the first converter. The aforementioned circuit can control the synchronization of a voltage boost time and output time of the first and second converters.

Abstract: The present invention discloses an electric arc isolation structure for isolating an electric arc produced by an arc discharge at a transformer, and the transformer includes a primary side input electrode terminal and a secondary side high-voltage output terminal. The exterior of the transformer is covered by an insulating sheath, and the insulating sheath at least fully covers the secondary side high-voltage output terminal of the transformer.

Abstract: An input device with multi-object switch transmission aims to establish a data transmission link between an input device and at least one information processing system. The input device contains a Bluetooth transmission device, a memory unit, a circuit unit and a micro control unit. The memory unit presets a plurality of protocol data fields. The Bluetooth transmission device gets multiple sets of Bluetooth communication protocol codes from multiple linkable information processing systems. The micro control unit saves each set of Bluetooth communication protocol code corresponding to each information processing system in each protocol data field of the memory unit. The circuit unit is triggered by a user to output a corresponding selection signal. The selection signal triggers the micro control unit to access the Bluetooth communication protocol code in a selected protocol data field from the memory unit to link the Bluetooth transmission device to one information processing system.

Abstract: A power conversion structure includes a power factor correction circuit which has an energy storage coil, a switch and a voltage boosting control unit. The voltage boosting control unit drives the switch to set OFF and ON of the switch to change the period of current passing through the energy storage coil to alter the phase of the current. The energy storage coil is coupled with at least one induction coil to induce and generate driving power to energize lighting equipment. The amount of the driving power is determined by the coil ratio of the induction coil and the energy storage coil. Through the induction coil, the energy storage coil can be induced to generate the driving power which is determined by the coil ratio of the induction coil and energy storage coil.

Abstract: A modularized power supply switch control structure aims to control a main power system of a power supply. The main power system includes at least one high voltage output unit at a high voltage output end and one low voltage output unit at a rear low voltage output end. A control unit is connected to the high voltage output unit and the low voltage output unit to control start/stop time series of the high voltage output unit and the low voltage output unit so that the high voltage output unit and the low voltage output unit can be started asynchronously. Thus the power supply can output a start voltage at the start instant to meet load requirement. A plurality of power output modules deliver output asynchronously. Hence output current or voltage surge at the start instant can be improved.

Abstract: A power supply to provide multiple synchronous outputs includes a standby power system to receive input power and regulate to become standby power and a main power system to receive the input power and regulate to become main output power. The main power system has a rectification output unit to deliver the main output power. The power supply further has at least one delay trigger unit to receive the main output power and a voltage regulation output unit. The delay trigger unit sets a voltage judgment level and determines whether to output a trigger signal based on the main output power being greater or smaller than the voltage judgment level. The voltage regulation output unit can be activated by getting the standby power. According to the generation time series of the trigger signal, the time series to generate the secondary output power can be regulated.

Abstract: The present invention discloses a frequency-changing voltage regulation circuit, which applies to a power supply device that has a booster unit and a power conversion unit. The booster unit modulates an input power and converts the input power into a boosted power. The boost control circuit is coupled to the frequency-changing voltage regulation circuit of the present invention. The frequency-changing voltage regulation circuit comprises: a voltage detection circuit and a frequency setting circuit. The voltage detection circuit detects the input power sent to the booster unit and generates an input level signal according to the value of the input power. The frequency setting circuit generates a reference frequency signal corresponding to the input level signal and uses the reference frequency signal to modulate the frequency that the booster unit performs power conversion.

Abstract: A protection circuit with variable current level limits is coupled to between a power supply system and a load. The power supply system outputs power to drive the load. The protection circuit with variable current level limits of the present invention comprises: a current level limiting switch unit which is coupled to between the power supply system and the load to conduct the output power, a detection unit which detects the current value of the output power, a current level setting unit which sets a normal-state current level limit and a transient-state current level limit according to the current value of the output power, a current level setting unit which checks the current value of the output power and controls the current level limiting switch unit to limit the current value and a timer unit.

Abstract: The present invention discloses a multi-input power-switching circuit, which comprises: more than one power input terminal, more than one detection/evaluation circuit, and a switching/controlling unit. A switch is arranged in the path via which the input power is received by the power input terminal and then transferred to the power conversion unit. Each detection/evaluation circuit receives a partial voltage signal from one input power and generates a detection signal according to the partial voltage signal. The switching/controlling unit receives the detection signals from the detection/evaluation circuits, determines which power input terminal has a higher voltage level according to the detection signals, and generates a turn-on signal to turn on the switch connected with the power input terminal having a higher voltage level. Thereby, the power conversion unit can acquire a higher voltage input power and provide a stable driving power for a load.

Abstract: A watertight switch comprises a cover and a base assembled together to form an accommodating space for mounting a switching module therein. The cover and the base, at the combination interface therebetween, respectively have a first junction interface and a second junction interface, which are inwardly shrunk to form a binding gap, the binding gap is gummed by an adhesive for fixedly combining and positioning the first and the second junction interfaces, and the adhesive will fill the binding gap without flowing over the first and the second junction interfaces.

Abstract: An ice maker equipped with a convection fan includes a control box, an ice making tray, a water intake unit and an ice sweeping shaft. The control box holds at least one convection fan and has at least one air inlet and one air outlet to allow the convection fan to generate cooling air convection to accelerate cooling speed and improve ice making efficiency.

Abstract: A power supply device with a system switch circuit includes a primary power system, a stationary power system and a power management unit. The power management unit is triggered by a remote ON/OFF signal to generate a bias voltage power for turning on the primary power system after obtaining a stationary power. The system switch circuit is triggered by the remote ON/OFF signal to interrupt the stationary power system from obtaining an electric power path of an input power or a reference frequency signal to interrupt the stationary power, and triggered by the remote ON/OFF signal again to conduct the stationary power system to obtain the electric power path of the input power or the reference frequency signal to generate the stationary power, so as to achieve the effects of reducing a power loss as well as maintaining a normal operation of the power supply device.

Abstract: A multi-output power supply includes a standby power system and a main power system. The main power system has a transformer and a rectification output circuit connecting to the transformer to generate first output power. The power supply further has an output time series judgment circuit and a plurality of voltage regulation units connecting respectively to the standby power system and the rectification output circuit. The output time series judgment circuit has a preset reference potential compared with the potential of the first output power to determine whether to output a feedback signal. Each voltage regulation unit is connected to the output time series judgment circuit to receive the feedback signal and be activated normally and determine a regulation time spot to synchronously regulate the first output power to second output power. Thus the time difference for delivering the first output power and the second output power can be regulated.

Abstract: The present invention discloses a portable image monitoring and identifying device suitable for monitoring an activity in the image and/or identifying image contents and when an image activity and/or an identified image content triggers certain preset event, a command or trigger signal can be sent out for controlling other external devices to act and/or send out a message to the user. The portable device includes an image input unit for inputting an input video, a main processor unit for executing functions of processing image data, detecting activity and triggering event, a memory unit for storing an operation data of the main processor, an input port for connecting with an input device so as to support the necessary operation by the user, and a control output port for outputting the command or trigger signal described above so as to control other external devices connected to the control output port to act.

Abstract: The present invention discloses a cooling-fan rotation-speed control circuit, wherein a plurality of sets of input power sources respectively having different voltages is electrically and parallel coupled to a cooling fan; a switch is installed between at least one input power source and the cooling fan; the switch is turned on/off according to a rotation-speed parameter to determine whether the cooling fan is driven by a low-voltage driving power or a high-voltage driving power.