Abstract: A passive current balance driving apparatus has a circuit topology composed by several simple passive components and is capable of driving a plurality of LED strings simultaneously. The present passive current balance driving apparatus is mainly configured such that each LED string has the identical load characteristics during the positive and negative half cycles of the AC power. As such, the currents flowing through the respective LED strings are basically/substantially equal, thereby achieving the current balance.

Abstract: A passive current balance driving apparatus has a circuit topology composed by several simple passive components and is capable of driving a plurality of LED strings simultaneously. The present passive current balance driving apparatus is mainly configured such that each LED string has the identical load characteristics during the positive and negative half cycles of the AC power. As such, the currents flowing through the respective LED strings are basically/substantially equal, thereby achieving the current balance.

Abstract: A transformer structure includes an iron core set, a main bobbin, and two sub-bobbins. The main bobbin includes a primary winding area for winding a first coil, a main bobbin through hole longitudinally mounted in and penetrating through the main bobbin, and two assembling troughs respectively formed at two ends of the main bobbin through hole. The two sub-bobbins are respectively accommodated in the two assembling troughs and respectively include a secondary winding area for winding a second coil and a sub-bobbin through hole communicated with the main bobbin through hole for penetrating the iron core set. Therefore, the sub-bobbins are mounted in two extended assembling troughs of the main bobbin, the first coil is wound on the primary winding area at the outer side of the main bobbin, and the first coil is separated from the second coils not only by horizontal distance but also by the assembling troughs.

Abstract: The present invention discloses a transformer structure, which has a winding reel. The winding reel has an iron-core frame. A first primary winding, a second primary winding and at least one secondary winding are wound on the iron-core frame. The first primary winding is electrically connected to the second primary winding. The secondary winding is arranged in between the first primary winding and the second primary winding. In the present invention, a plurality of the secondary windings may be arranged in between the first primary winding and the second primary winding and surrounded by the first primary winding and the second primary winding so that the transformer can drive a plurality of loads.

Abstract: The present invention discloses current collection board for a fuel cell. The current collection board for a fuel cell comprises a substrate and at least one current collection bar. The substrate includes at least one hollow portion. The current collection bars are made of stainless steel. Further, the current collection bars respectively cover the hollow portions of the substrate, and are fixed to the substrate.

Abstract: A method of calculating a fuel concentration in a direct methanol fuel cell is disclosed, and comprises the following steps. A direct methanol fuel cell is provided. One or more fuels with different known concentrations are separately provided for the direct methanol fuel cell such that the direct methanol fuel cell performs electrochemical reactions and generates power on the conditions of different known concentrations of fuels. A plurality of physical parameters produced when the direct methanol fuel cell is operated with fuels having known concentrations are respectively measured and recorded, and three of the physical parameters are selected to construct a corresponding three-dimensional measuring space. An interpolation means is generated based on the three-dimensional measuring space.

Abstract: A circuit board in a monitor containing a switch unit to control the size of the amperage outputted to drive the corresponding monitor for the circuit board to adjust its outputted amperage by means of the switch unit depending on the size of the monitor to be adapted to.

Abstract: A Spherical massager composed of two semispherical bodies. Each of the semispherical bodies has a soft facial layer on the surface. The soft facial layer is formed with multiple outward projecting contact sections. The mating faces of the two semispherical bodies are respectively disposed with a power supply section and an oscillation generating section. The power supply section has a recessed female connecting section formed on the connecting face of one of the semispherical bodies. The oscillation generating section including a male connecting section outward projecting from the mating face of the other semispherical body. The male connecting section is formed with a central hole for receiving a vibrating motor. An eccentric wheel is disposed at a front end of a rotary shaft of the vibrating motor to achieve a vibrating effect.

Abstract: A hockey puck of the type having a disk like main body which comprises a peripheral side surface substantially being of a cylindrical shape and comprises a top surface and a bottom surface all being flat, the hockey puck comprises the improvement of a plurality of bosses formed internally near the peripheral side surface and in an annular arrangement on each of the top and bottom surfaces, each of the bosses has a peak of small area. The puck is characterized in that the main body comprises two half main bodies made of hard material coupled with each other, and comprises a soft enveloping layer covering over the surfaces thereof but revealing only the bosses.