Abstract: A solar power collecting device includes a solar power concentrator and a solar cell. The solar power concentrator includes a fructoconical reflector and a converging lens. The reflector includes a fructoconical inner reflecting surface, a wide end open to an outside and a narrow end, the reflecting surface configured for reflecting and directing sunlight from the wide end to the narrow end. The converging lens is located at the narrow end of the reflector, and is configured for receiving and converging the reflected sunlight from the reflector and sunlight incident thereon directly from the wide end. The solar cell is configured for converting the converged sunlight from the solar power concentrator into electricity.

Abstract: A light guide plate includes a light emitting surface and a micro structure positioned on the light emitting surface. The micro structure includes a plurality of pyramids projecting from the light emitting surface. Each of the pyramids includes a bottom surface and a plurality of side surfaces connected to the bottom surface. An included angle between each side surface and the bottom surface of each pyramid is in the range from about 15 degrees to about 25 degrees. An illuminating device including the light guide plate is also provided.

Abstract: A light guide plate includes a light incident surface and a plurality of micro cylinders protruding from the light incident surface in parallel. Each of the micro cylinders has a circumference surface and two opposite end surfaces. The circumference surface is connected to the light incident surface. The two end surfaces are positioned on two opposite ends of the circumference surface, and are perpendicular to the light incident surface. Each of the two end surfaces is circular arc-shaped, and the radius of each of the two end surfaces is in the range of 0.04 ?m to 0.07 ?m.

Abstract: An organic light-emitting diode includes a substrate layer, a cathode layer spread on the substrate layer, an organic film spread on the cathode layer and an anode layer spread on the organic film. The substrate layer is made of electrically insulative and transparent material. The cathode layer is made of transparent and electrically conductive material. The organic film includes an organic luminescent layer. Molecules of the organic film orient toward a uniform direction and the organic film radiates polarization light.

Abstract: An apparatus for manufacturing an optical film includes a first pressing roller, a second pressing roller, an UV solidifying unit and a winding roller. The first pressing roller and the second pressing roller are spaced a predetermined distance from each other and configured for cooperatively molding the optical film by means of microstructures formed on a peripheral surface of the first pressing roller. Reverse-face microstructures are imprinted on the optical film. A diameter of the first pressing roller is smaller than that of the second pressing roller, and a diameter of the winding roller is larger than that of the second pressing roller. The UV solidifying unit is configured for solidifying the molded optical film.