Abstract: A power supply device includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit performs a step-down operation according to a first voltage to output a first output voltage via a first connection interface. The second voltage conversion unit includes a first rectifying circuit and a power delivery circuit. The first rectifying circuit performs a first rectifying operation based on load information of a load and the first voltage to generate a second voltage. The power delivery circuit determines, according to the load information and the second voltage, whether to output the second voltage as a second output voltage to the load via a second connection interface. The first connection interface is different from the second connection interface, and the second output voltage is higher than or equal to the first output voltage.

Abstract: A power conversion device and a method for preventing abnormal shutdown thereof are provided. The method includes: providing a power conversion device including a main power supply and a standby power supply electrically connected to the main power supply. The standby power supply is configured to provide an operational voltage for microcontrollers of the main power supply; performing a monitoring procedure for monitoring the operational voltage when the power conversion device entering a non-standby mode and the standby power supply is inactivated; and forcing the standby power supply to activate before the operational voltage is lower than a preset compensation voltage, such that an abnormal shutdown condition of the power conversion device while the operational power is equal to or lower than the preset compensating voltage is prevented.

Abstract: A cloud-based transregional license-plate-recognition system and a method thereof are disclosed. The system includes a local license-plate-capture module and a cloud license-plate-recognition module. The local license-plate-capture module captures a license plate image when detecting that a vehicle is approaching, obtains position information, modulates the license plate image and the position information into recognition information and sends the recognition information to the cloud license-plate-recognition module. The cloud license-plate-recognition module retrieves and demodulates the recognition information to retrieve a recognition image and index information, selects at least one of a plurality of recognition logics according to the index information, and executes a license-plate-recognizing process on the recognition image by the selected recognition logic for generating license plate information.

Abstract: A charger with a wide range output voltage includes a voltage output side, a first constant voltage output unit, a voltage modulation unit and a load voltage detection unit. The first constant voltage output unit generates a first constant voltage. The load voltage detection unit detects a load voltage and transmits the load voltage to the voltage modulation unit. According to the load voltage and a load charging voltage requirement, the voltage modulation unit generates a modulation voltage and transmits the modulation voltage to the first constant voltage output unit. The first constant voltage output unit transmits the first constant voltage and the modulation voltage to the voltage output side. Moreover, the modulation voltage is an n times of a second constant voltage. The n is a positive number.

Abstract: A surge voltage protection apparatus includes a surge voltage absorbing component, a ground component, an electrical status sensing circuit and a control unit. The surge voltage absorbing component receives a surge voltage, so that the electrical status sensing circuit senses an electrical status between the surge voltage absorbing component and the ground component to obtain an electrical data. The electrical status sensing circuit sends the electrical data to the control unit. After the control unit receives the electrical data, the control unit determines the electrical data. When the electrical data is greater than an electrical data predetermined value, the control unit informs a power supply apparatus that the electrical data is greater than the electrical data predetermined value, so that the power supply apparatus is turned off to protect the power supply apparatus.

Abstract: A low profile keyboard backlight module includes an electrically insulative bottom membrane layer, an intermediate membrane layer including a conducting layer, an insulative layer and a light-emitting layer attached together through lamination and bonded to the top surface of the bottom membrane layer, and an electrically insulative top membrane layer bonded to a top surface of the intermediate membrane layer opposite to the bottom membrane layer and having an integrated elastic layer located at a top surface thereof to support a set of keys. Thus, the low profile keyboard backlight module provides optimal waterproof effects and is practical for use in an electronic product having light, thin, short and small characteristics.

Abstract: A power supply includes a DC to DC converter, a storage capacitor, a voltage detector, a bypass unit, and a voltage-multiplying unit. The DC to DC converter receives a capacitor voltage from the storage capacitor and generates an output voltage; the voltage detector is configured to detect an input voltage. The bypass unit electrically connected to the storage capacitor turns on when the input voltage is equal to or greater than the capacitor voltage and turns off when the input voltage is lower than the capacitor voltage. The voltage-multiplying unit electrically connected to the storage capacitor and the voltage detector includes a first winding and a second winding and performs a voltage-multiplying procedure by coupling the first winding to the second winding while the input voltage is lower than a threshold voltage to ensure that the DC to DC converter can generate the output voltage for a specific period.

Abstract: An input-voltage-off detection apparatus includes a voltage adjustment unit, a time delay unit, a voltage clamp unit, an auxiliary voltage discharge switch unit and an isolation notification unit. The voltage adjustment unit receives an input voltage. The time delay unit utilizes the input voltage to generate a direct current voltage. After the input voltage is cut off, the direct current voltage stored in the time delay unit discharges to the voltage adjustment unit. When the direct current voltage reduces to a predetermined voltage, the auxiliary voltage discharge switch unit is turned on, so that an auxiliary voltage winding sends a working voltage to the isolation notification unit. After the isolation notification unit receives the working voltage, the isolation notification unit notifies an electronic apparatus that the input voltage is cut off.

Abstract: A power switching apparatus includes a detection circuit, a control circuit and an auxiliary power circuit. The detection circuit comprises a voltage adjusting unit, a delay unit, a first switch unit and an isolation unit. The auxiliary power circuit comprises an auxiliary power input side and an output side. When a main power supplies power normally or the main power stops supplying power but the delay unit continues working in a setting time, the first switch unit is turned on. The isolation unit sends a first signal to the control circuit. The auxiliary power input side does not conduct to the output side. When the main power stops supplying power and the delay unit stops working, the first switch unit is turned off. The isolation unit does not send the first signal to the control circuit. The auxiliary power input side conducts to the output side.

Abstract: A multi-output control system includes a power conversion module, a first active linear module, a second active linear module, a control module and a feedback control module. The control module controls the feedback control module to adjust an output power based on current signals. The first active linear module and the second active linear module determine whether a difference value between a current value of a first output power and a current value of a second output power is greater than a current difference predetermined value based on the current signals, and the control module adjusts a voltage value of the first output power and a voltage value of the second output power to respectively be within a predetermined voltage range based on the current signals.

Abstract: LED lighting device includes LED light housing including hollow outer shell with planar mounting surface defined inner top side of accommodation chamber to face toward bottom opening and reflector cup mounted accommodation chamber and defining conical reflective surface therein and carrying lens at top center thereof with light exit surface of lens facing toward bottom opening of hollow outer shell, LED light-emitting module including circuit board mounted between planar mounting surface and lens, array of LEDs arranged front side of circuit board and control circuit with driver IC and capacitor thereof respectively arranged opposing front and back sides of circuit board for converting inputted AC power into stabilized DC power for driving LEDS.

Abstract: A light emitting diode driving system includes an infrared ray burning device and a light emitting diode driving device. The light emitting diode driving device includes an infrared ray receiving unit, a signal transforming unit, a storage unit, a pulse width modulating unit and a diode driving unit. The infrared ray receiving unit receives a burning signal transmitted by the infrared ray burning device; the signal transforming unit transforms the burning signal into a current control command and transmits it to the storage unit. The signal transforming unit generates a current control signal in accordance with the current control command in the storage unit. The pulse width modulating unit generates a pulse width modulation output current control signal according to the current control signal. The diode driving unit drives the light emitting diode by the pulse width modulation output current control signal.

Abstract: A power conversion device and a method for correcting decision threshold level thereof are disclosure. The method for correcting awaking-voltage of a power conversion device is provided. The method includes: fixing an output current of the power conversion module; monitoring a real decision threshold level of the power conversion module when the power conversion module departs from a burst mode; adjusting a preset decision threshold level based on the comparison between the real decision threshold level and the preset decision threshold level to make the preset voltage be equal to the real decision threshold level.

Abstract: A real-time lighting control system of an ecosystem and real-time lighting control method includes a computer device, multiple lighting devices and multiple wireless base stations. The lighting devices and the wireless base stations are arranged in multiple lighting regions of an indoor space. Each wireless base station emits a wireless signal continuously, and controls one or more connected lighting devices when receiving a lighting control signal. The computer device senses the wireless signals continuously, and keeps determining its position at the different time points according to the received wireless signals and the arranged positions of the wireless base stations. Next, the computer selects one of the lighting regions according to space information and the determined positions, and sends the lighting control signal to one of the wireless base stations arranged in the selected lighting region.

Abstract: A power supply module coupled with a primary winding of a power conversion module, the power supply module includes a plurality of power-controlling modules, a plurality of second switches, and a microprocessor. Each power-controlling module includes an auxiliary winding and a first switch electrically connected in series, and each auxiliary winding is magnetic coupled with the primary winding. Each second switch is electrically connected to one of the power-controlling units. The microprocessor is electrically connected to the first switches of the power-controlling modules and the second switches. The microprocessor places at least one first switch and one of the second switches in a conducting state to make the first switch in the conducting state and the second switch in the conducting state electrically connect in series and output an electric power to power the power conversion module.

Abstract: A power adapter with a power saving mode includes a power adaptation unit. The power adaptation unit includes a pulse width modulation control unit and a power saving signal receiver. The power saving signal receiver is electrically connected to the pulse width modulation control unit. When the power adapter enters a working status, the power adapter charges a battery. After the power saving signal receiver receives a battery fully-charged signal, the power adapter enters a sleeping status.

Abstract: A power supply apparatus with a protection function includes a pulse width modulation control unit, a pulse width modulation detecting unit, a switch unit and a feedback circuit. The feedback circuit detects a bus voltage. When the feedback circuit detects that the bus voltage is greater than a predetermined voltage, the feedback circuit sends an informing signal to the pulse width modulation control unit. The pulse width modulation control unit adjusts a duty cycle of a pulse width modulation signal and sends the pulse width modulation signal to the pulse width modulation detecting unit. When the pulse width modulation detecting unit detects that the duty cycle of the pulse width modulation signal is less than a predetermined cycle, the pulse width modulation detecting unit turns off the switch unit to stop outputting power to avoid a reverse current phenomenon.

Abstract: The current adjustment apparatus includes a communication interface, a current generating module, and a current adjustment module. The current generating module includes a microprocessor, a memory for storing a current setting parameter, and a current generating unit; the memory and the current generating unit are electrically connected to the microprocessor. When the current adjustment module is not physically connected to the current generating module, the microprocessor makes the current generating unit generate a driving current in response to the current setting parameter; when the current adjustment module is physically connected to the current generating module via the communication interface, the microprocessor makes the current generating unit generate the driving current in accordance with a setting signal from the current adjustment module, and the microprocessor further overwrites the current setting parameter in accordance with the setting signal when receives a writing signal.