Abstract: A projector, a fastening assembly thereof and a fastening method are provided. The fastening assembly can accommodate the portable projector and fasten it onto a tripod or a pan-tilt to perform projection. The fastening assembly has specific open regions that allow a user to access function keys of the projector and allow I/O ports of the projector to be connected with external devices.

Abstract: A plastic color wheel assembly includes a motor and a color filtering plate. The color filtering plate is disposed at one side of the motor and is made of plastic A projection system including the plastic color wheel is also disclosed.

Abstract: A color wheel assembly includes a motor and a color filter. The motor has a main body and a housing. The housing is integrally formed and covers the main body. The color filter is disposed directly on the housing.

Abstract: A thermal heating system, apparatus and method for heating a fluid using thermal radiation, for example, solar thermal radiation. The thermal heating apparatus includes a tank containing a fluid, a plurality of thermal units arranged in a panel and connected to the tank, and a frame supporting the tank and the thermal units. The thermal units may comprise a heat pipe that is receivable within a tube protruding into the tank. The tube may be formed directly with the tank or provided as a separate piece. The thermal units may also include a thermal casing that encapsulates the heat pipe, for example in a vacuum. Providing a thermal heating apparatus as described may allow collection and transfer of thermal energy to a fluid in the tank. The heated fluid may then be circulated for use in other parts of a thermal heating system.

Abstract: A light tunnel with a gradient filter layer includes a light tunnel body and a gradient filter layer. In this case, the gradient filter layer is disposed at a light emerging side. The transmission rate at the central area of the gradient filter layer is smaller than the transmission rate at the edge area of the gradient filter layer.

Abstract: A color wheel includes a color filter and a motor. In this case, the motor has an shaft, a rotor-oriented element, and a motor shell. The shaft is vertically installed on the rotor-oriented element. The motor shell has an opening in a direction of the shaft. The rotor-oriented element and the shaft are set inside the motor shell. The rotor-oriented element covers the opening of the motor shell, so as to form a concave portion constructed by the motor shell and the rotor-oriented element. The color filter is set on a surface of the motor, which is formed with the concave portion.

Abstract: A light tunnel with a gradient filter layer includes a light tunnel body and a gradient filter layer. In this case, the gradient filter layer is disposed at a light emerging side. The transmission rate at the central area of the gradient filter layer is smaller than the transmission rate at the edge area of the gradient filter layer.

Abstract: In a method of testing an IC, short circuits between adjacent I/Os are tested by grounding alternate rows in one step, and alternate columns in another step, and, if necessary including a third step of testing any inadequately tested I/Os by identifying inadequately tested I/Os and then testing these. The identifying may include performing an AND operation on the two I/O configurations of the two first steps, the grounded I/Os being defined as logic 0 and the tested I/Os as logic 1. The third step involves grounding all power supply and all ground pins of the IC and testing the remaining I/Os that were inadequately tested in both of the first two steps.