Abstract: An integrated advertisement board includes a frame, several light emitting elements arranged on the frame in a form of a matrix, and a controlling circuit electrically connected to the light emitting element; the controlling circuit is used for making each light emitting element emit light and stop emitting light in an alternate way for the light emitting element to present patterns as well as for the patterns to have constantly changing appearance.

Abstract: An integrated advertisement board includes a frame, several light emitting elements arranged on the frame in a form of a matrix, and a controlling circuit electrically connected to the light emitting element; the controlling circuit is used for making each light emitting element emit light and stop emitting light in an alternate way for the light emitting element to present patterns as well as for the patterns to have constantly changing appearance.

Abstract: A rotary valve structure is provided for a four-stroke engine having a cylinder in which a piston is brought by a crankshaft to move in reciprocating motion and a combustion chamber is provided to communicate with separated gas-in and gas-out passages. The rotary valve structure includes an intake and an exhaust rotary rod rotatably located at a gas inlet of the gas-in passage and a gas outlet of the gas-out passage, respectively. The intake and the exhaust rotary rods are rotated by a transmission mechanism driven by the crankshaft, such that an intake and an exhaust hole radially extended through the intake and the exhaust rotary rod, respectively, are turned either to communicate the gas-in and the gas-out passages with the combustion chamber or to close the gas-in and said gas-out passages at the gas inlet and the gas outlet.

Abstract: LED lamps include a hollow light-transparent ball and one or more LED of the same or different colors fixed behind the ball, which has an inner semi-transparent layer and an outer transparent layer. The semi-transparent layer has a larger deflecting percentage than the outer transparent layer so that light emitted by the LED may deflect and collide with each other many times in the semi-transparent layer of the ball to produce soft and evenly mixed colored light when seen through the ball.