Abstract: A cooling module assembly method comprises forming at least one through-hole on a circuit board; coupling the circuit board to a heat dissipating unit so that a face of the circuit board is coupled to a coupling face of the heat dissipating unit; filling the at least one through-hole with metal solders; fixing at least one heat-generating element to another face of the circuit board, wherein the at least one heat-generating element aligns with and covers the at least one through-hole; and soldering the at least one heat-generating element and the heat dissipating unit together by melting the metal solders in the at least one through-hole.

Abstract: A heat dissipating assembly includes a circuit board having opposite first and second faces. The circuit board further includes a through-hole extending from the first face through the second face. A heat generating element is mounted on the first face of the circuit board and electrically coupled to the circuit board. The heat generating element includes a heat conducting portion aligned with the through-hole. A heat dissipating unit includes a base having an engaging face in contact with the second face of the circuit board. A metal solder is filled in the through-hole. The metal solder is engaged with the engaging face of the base and the heat conducting portion of the heat generating element. The heat generating element is directly engaged with the heat dissipating unit by the metal solder to effectively enhance the overall heat dissipating efficiency while reducing the number of members to lower the manufacturing costs.

Abstract: A rotation control circuit comprises a motor-driving unit and a rotation-switching unit. The motor-driving unit is coupled to a motor of a fan. The rotation-switching unit is coupled to the motor-driving unit and has at least a charging-discharging circuit for generating a rotation control command, the rotation control command controls the motor to rotate in a forward direction for a time period when the motor starts to operate, and controls the motor to rotate in a backward direction opposite to the forward direction.

Abstract: An alternating current (AC) light-emitting diode (LED) lamp includes a first AC power end, a second AC power end, a lighting module and a direct current (DC) power output circuit. The lighting module has a first end, a second end and at least one LED unit, wherein the first end is electrically coupled to the first AC power end. The at least one LED unit has one or more LEDs connected in series. The DC power output circuit has a first end and a second end, wherein the second end of the DC power output circuit is electrically coupled to the second AC power end, while the first end of the DC power output circuit is electrically coupled to the second end of the lighting module. The DC power output circuit has a DC output side.

Abstract: A lamp circuit is disclosed, comprising a direct current (DC) power supplier adapted to provide a supply voltage, a driving unit coupled to the DC power supplier so as to receive the supply voltage, and a light-radiating module coupled to the driving unit and having a DC output side. The driving unit generates a constant DC current that passes through the light-radiating module such that a DC voltage to be supplied to a DC load is built at the DC output side.

Abstract: A lamp includes a lighting module having a lighting element and a control circuit electrically connected to the lighting element. The lamp further includes a control unit having a temperature sensor and a processor electrically connected to the temperature sensor and the control circuit. The temperature sensor senses a temperature of the lighting element and generates a temperature sensing result. The processor controls brightness of the lighting element based on the temperature sensing result of the temperature sensor. Since the brightness of the lighting element can be controlled by the processor through the control circuit using the temperature sensing result, overheating of the lighting element during operation can be avoided. The service life of the lighting element is, thus, prolonged.