Patent ID: 8851838

Claim:
A displayable wind turbine, comprising: a central shaft arranged vertically to a flow direction of fluid to transmit rotary power to an electric generator; an upper hub provided on a top of the central shaft and configured such that a plurality of radially extending upper spokes is coupled to the upper hub; a lower hub provided on a bottom of the central shaft and configured such that a plurality of radially extending lower spokes is coupled to the lower hub; a plurality of blades, first ends of which are rotatably connected to an end portion of the upper hub and second ends of which are rotatably connected to an end portion of the lower hub; a pitch control unit configured to adjust a pitch angle of the blades by horizontally rotating the blades; a detection unit including a fluid direction detection unit for detecting a flow direction of the fluid, a fluid velocity detection unit for detecting a flow velocity of the fluid, a central shaft speed detection unit for detecting a rotational speed of the central shaft, and a central shaft position detection unit for detecting a rotating position of the central shaft; a light emitting unit including a printed circuit board provided on one blade surface of each of the blades and a plurality of light emitting devices mounted on a top surface of the printed circuit board; and a control unit configured to control operations of the pitch control unit and the light emitting unit and to individually turn on or off the light emitting devices depending on variation in the rotational speed of the central shaft and the pitch angle of the blades.