Abstract: A power supply apparatus and a control method thereof are provided. Power conversion is performed according to a switching signal group to provide an output voltage and an output current. An error value between the output voltage and a reference voltage is multiplied by a proportional parameter to obtain a proportional result. The error value is multiplied by an integration parameter to obtain a first calculation value which is then accumulated over time to obtain an integration result. When a slope of the output current is greater than a reference slope and a slope of the output voltage is negative, the slope of the output voltage is multiplied by a differential parameter to obtain a second calculation value which is then added to the integration result over time. A duty cycle of the switching signal group is adjusted according to the sum of the proportional result and the integration result.

Abstract: An inrush current test device is adapted to receive an alternating current. The inrush current test device includes: a first isolation coupling component, a positive crossing point pulse generation circuit, an output circuit, and a control circuit. The first isolation coupling component includes a primary side and a secondary side, and is responsive to the alternating current on the primary side and conducts the secondary side. When the secondary side transits from an off state to an on state, the positive crossing point pulse generation circuit generates a positive crossing point pulse. When the control circuit is actuated and the positive crossing point pulse is detected, after delaying for a delay time, the control circuit outputs a control pulse for actuating the output circuit for a first operating time. The output circuit is configured to receive the alternating current and output the alternating current when the output circuit is actuated.

Abstract: An illuminated vehicular emblem for a means of transportation includes a housing unit, a lighting unit and a light dimming unit. The housing unit includes a bottom case, a top case disposed on the bottom case, and an emblem member disposed above the top case. A receiving space is defined between the top and bottom cases to receive the lighting unit. The lighting unit includes a light guide plate, light emitting components and a first light shielding film disposed on the light guide plate. The light emitting components are disposed at the light guide plate such that the light guide plate receives light emitted from the light emitting components. The light dimming unit changes the direction of propagation of the light and includes a first dot portion distributed on the light guide plate and along a projection of an outline of the emblem member.

Abstract: A keyboard backlight module includes a light-guiding sheet, a circuit board, a light-emitting element, a reflective sheet and a release film. The circuit board is located on a surface of the light-guiding sheet, and the reflective sheet is located on another surface of the light-guiding sheet opposite to the circuit board. The light-emitting element is located between the circuit board and the light-guiding sheet, and disposed on the circuit board. The light-emitting element emits light into the light-guiding sheet. The release film is located on the light-guiding sheet and the circuit board, and transfers a glue layer on the surface of the light-guiding sheet. The light-guiding sheet includes a plurality of illuminated patterns, and the keyboard backlight module adjusts the illumination uniformity of the light through the reflective sheet, the glue layer and the plurality of illuminated patterns.

Abstract: A power conversion system is provided. The system includes a switch module, a resonant module, a magnetic conversion module, a bobbin and an iron core. The magnetic conversion module includes a primary winding and a PCB winding module. The PCB winding module includes a printed circuit board, a conductive layer disposed on at least one surface of the printed circuit board, and a switch unit disposed on the printed circuit board.

Abstract: A power supply apparatus and a control method thereof are provided. Power conversion is performed according to a switching signal group to provide an output voltage and an output current. An error value between the output voltage and a reference voltage is multiplied by a proportional parameter to obtain a proportional result. The error value is multiplied by an integration parameter to obtain a first calculation value which is then accumulated over time to obtain an integration result. When a slope of the output current is greater than a reference slope and a slope of the output voltage is negative, the slope of the output voltage is multiplied by a differential parameter to obtain a second calculation value which is then added to the integration result over time. A duty cycle of the switching signal group is adjusted according to the sum of the proportional result and the integration result.

Abstract: A load identification system includes an AC-power input unit, a load, a zero-crossing detector, a microcontroller, a first and a second current phase detectors. The zero-crossing detector is configured to output a zero-voltage pulse signal when a zero-crossing signal of the AC-power input unit is detected. The first current phase detector detects a current flowing through the load to output a first voltage signal. When the current flows along a first direction, the first voltage signal is at a high level. The second current phase detector is configured to detect the current flowing through the load to output a second voltage signal. When the current flows along a second direction, the second voltage signal is at a high level. The microcontroller is configured to receive and identify the type of the load according to the zero-voltage pulse signal, the first and the second voltage signals.

Abstract: An insulation cover fixing structure and a protection device include a first insulation, a first metal shielding cover and an engaging unit. The first insulation cover includes a first bottom plate and a first side plate. The first metal shielding cover is disposed at an outer side of the first insulation cover. The first metal shielding cover includes a second bottom plate and a second side plate. The engaging unit is disposed on at least one of the first insulation cover and the first metal shielding cover. The first metal shielding cover and the first insulation cover are fixed by the engaging unit. The engaging unit includes a first tongue extended with bend from one of the first side plate and the second side plate toward the other and a second tongue extended from the first tongue. The second tongue is pressed against the other of the first side plate and the second side plate.

Abstract: Disclosed is a valve, an expansion valve and their stepping control methods. The valve includes a valve body, a limiting unit, and a heating unit installed in the limiting unit. The valve body has an actuation space, and a first through hole and a second through hole communicated with the actuation space, and the actuation space further contains a valve seat disposed between the first and second through holes, and the limiting unit is installed in the actuation space, and a variable spacing is defined between the limiting unit and the valve seat. When the variable spacing is reduced, the heating unit heats up the interior of the limiting unit for heating to prevent ice buildups, so as to maintain a flowing state of the variable spacing.

Abstract: A backlight module is disclosed. The backlight module includes a light emitting component, a first light guide plate and a second light guide plate. The first light guide plate is disposed above the light emitting component and includes a first hole located correspondingly to the light emitting component. The second light guide plate is disposed between the light emitting component and the first light guide plate and includes a second hole. The second hole is located corresponding to the light emitting component and communicates with the first hole. The diameter of the second hole is greater than the diameter of the first hole.

Abstract: The present disclosure discloses a light emitting device. A plurality of luminous dots disposed on a light guiding plate is distributed on a first area and a second area of the light guiding plate by a first density and a second density, respectively. A plurality of diffusion dots disposed on a diffusion film is distributed on a third area and a fourth area of the diffusion film by a third density and a fourth density, respectively. The first area of the light guiding plate is projected to the third area of the diffusion film, and the second area of the light guiding plate is projected to the fourth area of the diffusion film. A sum of the first density and the third density after an approximation and a sum of the second density and the fourth density after the approximation are both equal to a predetermined value.

Abstract: A soft-start control circuit is provided. The soft-start control circuit includes a load switch, a driving unit and a filtering unit. The first terminal of the load switch is configured to receive an input voltage. The control terminal of the load switch is configured to receive a switching signal and perform switching between on and off according to the switching signal, thereby performing a soft-start operation. The second terminal of the load switch is configured to provide a switched voltage. The driving unit is configured to provide a switching signal according to a control signal and release a parasitic charge stored in the load switch when the load switch is turned off. The filtering unit is configured to convert the switched voltage into an output voltage.

Abstract: A soft-start control circuit is provided. The soft-start control circuit includes a load switch, a driving unit and a filtering unit. The first terminal of the load switch is configured to receive an input voltage. The control terminal of the load switch is configured to receive a switching signal and perform switching between on and off according to the switching signal, thereby performing a soft-start operation. The second terminal of the load switch is configured to provide a switched voltage. The driving unit is configured to provide a switching signal according to a control signal and release a parasitic charge stored in the load switch when the load switch is turned off. The filtering unit is configured to convert the switched voltage into an output voltage.

Abstract: A constant power protection circuit includes a voltage conversion circuit, a current detection circuit, a voltage detection circuit, a power setting circuit, a voltage feedback circuit, an addition circuit, a current feedback circuit, and a signal isolation unit. When an output voltage of the voltage conversion circuit is larger than a voltage of the voltage detection circuit and an output current of the voltage conversion circuit is larger than a current of the current detection circuit, the power setting circuit provides a comparison signal to the current feedback circuit, the current feedback circuit outputs a feedback signal to the signal isolation unit. According to a signal outputted from the signal isolation unit, the voltage conversion circuit enables a constant power mode.

Abstract: A lighting system suitable for receiving two kinds of power signals includes a light emitting unit, a switch control circuit, first and second power adjustment circuits, and first and second switches. The switch control circuit is electrically connected to the light emitting unit, the first and second switches. When the light emitting unit and the switch control circuit receive a first power signal, the switch control circuit turns on the first switch and turns off the second switch, so that a first current drives the light emitting unit to emit. When the light emitting unit and the switch control circuit do not receive the first power signal and the second power adjustment circuit receives the second power signal, the switch control circuit turns off the first switch and turns on the second switch, so that a second current drives the light emitting unit to emit.

Abstract: The present disclosure discloses an illuminating keyboard, which includes a light emitting module, a reflection plate and a light guiding plate. The light emitting module includes a circuit board, a plurality of electronic components, and a plurality of light emitting units. The electronic components and the light emitting units is disposed on the circuit board, the electronic components are collectively disposed in an area, the light emitting units surround the area, and the light from the light emitting units is directed outside the area. The reflection plate has a through hole corresponding to the light emitting units. The light guiding plate is disposed above the reflection plate, and has a slot hole corresponding to the through hole. The light emitting units are accommodated in the space formed by the through hole and the slot hole, and the light guiding plate receives the light from the light emitting units.

Abstract: A power converter device includes a first phase-shift full-bridge circuit, a second phase-shift full-bridge circuit, a detector circuit, and a control circuit. The control circuit controls the first phase-shift full bridge circuit and the second phase-shift full bridge circuit. The control circuit disables the second phase-shift full-bridge circuit when the output current is less than a first predetermined value. The control circuit enables the second phase-shift full-bridge circuit when the output current is equal to or greater than the first predetermined value. The control circuit controls a synchronous switching circuit of the second phase-shift full-bridge circuit to operate in a traditional control mode when the output current is equal to or greater than a second predetermined value and a duty cycle of a phase-shift switching circuit is equal to or greater than a third predetermined value. The second predetermined value is greater than the first predetermined value.

Abstract: An inverter integrated motor having a frame, a motor body, a cap, a fan, an inverter, and a heat transfer module is provided. The motor body is received in the frame, and a heat dissipation passage is formed between them, the motor body is covered and closed by the cap, and the cap and the motor body are presented in a continuous form. The inverter is attached on an outer side surface of the frame. The heat transfer module is located between the cap and the fan and thermally connected to the inverter. Airflow is generated by the fan to flow through the heat transfer module and exchange heat therewith, and the airflow then flows into the heat dissipation passage along the cap. Accordingly, an attached additional fan for the inverter is not necessary.

Abstract: A motor sleeve is applied to a motor housing and a motor driver housing. The motor sleeve includes a sleeve base, a second fixing structure, a second coupling structure and a plurality of base fins. The sleeve base includes an outer surface and an inner surface. The second fixing structure is disposed on the inner surface and located corresponding to a first fixing structure of the motor housing. The sleeve base is fixed to the motor housing by the first and second fixing structures. The sleeve base is installed on a side portion of the motor housing. The second coupling structure is disposed on the outer surface. The base fins are separately disposed on the outer surface and located corresponding to a first coupling structure of the motor driver housing. The motor driver housing is coupled to the sleeve base by the first and second coupling structures.

Abstract: A system is disclosed and includes an air-conditioning load prediction unit for predicting a load of an air-conditioning unit in a future time period based on past data; an indoor temperature and humidity sensing module for sensing temperature and humidity of a building at a first time; a fan-speed sensing module for sensing a fan-speed of the air-conditioning unit at the first time; and a comfort-degree prediction module for calculating a comfort-degree that the air-conditioning unit is required to reach at a second time based on the sensed temperature, sensed humidity and sensed fan-speed; an energy management unit for controlling a central monitoring computer to set a temperature and an fan-speed of the air conditioning unit, and compare the predicted load and an actual load of the air conditioning unit for adjusting the set temperature and the set fan-speed in real time. A method of adjusting is also provided.