Abstract: Weather-resistant light emitting diode (LED) assemblies, which prevent water and moisture from entering the LED assemblies, which may be integrated to form a display, so that images may be displayed on the display are provided. A waterproof light emitting diode (LED) assembly including an LED tile including one or more LED boards; and a power box, wherein each LED board includes an array of LEDs, and the LED tile and the power box are connected through a plurality of waterproof connector assemblies is provided. Each waterproof connector assembly comprises a waterproof connector plug and waterproof connector socket having an O-ring, wherein the waterproof connector having the O-ring cooperatively interfacing with the waterproof connector plug seals the waterproof connector assembly. A waterproof LED panel including a plurality of waterproof LED assemblies mounted on a LED panel frame is also provided.

Abstract: Weather-resistant light emitting diode (LED) assemblies, which prevent water and moisture from entering the LED assemblies, which may be integrated to form a display, so that images may be displayed on the display are provided. A waterproof light emitting diode (LED) assembly including an LED tile including one or more LED boards; and a power box, wherein each LED board includes an array of LEDs, and the LED tile and the power box are connected through a plurality of waterproof connector assemblies is provided. Each waterproof connector assembly comprises a waterproof connector plug and waterproof connector socket having an O-ring, wherein the waterproof connector having the O-ring cooperatively interfacing with the waterproof connector plug seals the waterproof connector assembly. A waterproof LED panel including a plurality of waterproof LED assemblies mounted on a LED panel frame is also provided.

Abstract: A method for assembling an LED display includes the steps of: preparing a prefabricated diffuser film containing a light diffusion agent; mounting a plurality of light emitting elements on a substrate, thereby forming a plurality of gaps among the plurality of light emitting elements; filling the plurality of gaps with a black resin to form a planar surface composed of top surfaces of the plurality of light emitting elements and top surfaces of the black resin in the plurality of gaps; applying a transparent resin layer over the planar surface; and affixing the prefabricated diffuser film on the transparent resin layer. The resulting LED display has a plurality of light emitting elements surrounded by a black resin to form a checkered surface, a transparent resin layer affixed to the checkered surface; and a diffuser film affixed to the transparent resin layer by an adhesive.

Abstract: A holding device has a holding base, a connecting element and a holding bolt. The connecting element is attached to the holding base and has a threaded hole defined through the connecting element. The holding bolt is screwed onto the holding base to hold the rear derailleur. Accordingly, the rear derailleur is kept from shaking with the holding device during the travel of the bicycle.

Abstract: A chain sprocket for a bicycle has a body and at least one cover. The body has a periphery, two side surfaces, multiple teeth formed on the periphery and the cover formed on the side surfaces of the body. The cover has at least one arcuate piece with an arcuate periphery for supporting a chain mounted on the chain sprocket. With such feature, the chain will not easily release from the sprocket whereby trouble-free transmission is provided.

Abstract: A skateboard includes a wood-made base plate (10) and a graphite fiber-made resilient plate (20) to make the skateboard has excellent resilient and endurance. Additionally, the skateboard has the resilient plate (20) embedded inside so that the graphite fiber does not crack at edges to form sharp thorns to make users hurt.

Abstract: A skateboard includes an elongated body having a top plate, a bottom plate and two opposite closed side plates each located between the top plate and the bottom plate, a support base formed on the mediate portion of the top plate, a plurality of reinforcing ribs each longitudinally arranged in the elongated body and each supported between the top plate and the bottom plate, two strengthened frames each longitudinally arranged in the elongated body located adjacent to the support base, and each supported between the top plate and the bottom plate, and a foam core material inside the elongated body located between the strengthened frames and the reinforcing ribs.