A wind turbine comprises of a shaft about a longitudinal axis and a plurality of blades coupled to the shaft. At least one of the blades has an array of light emitting diodes controlled to generate a viewable image when the turbine rotates about the axis. The image is generated by individual control of each LED while the array of LEDs follows the movement of the wind turbine blades, thus sweeping an area where the image appears. Means for controlling the LEDs include variable speed control to generate steady or moving images when the turbine rotates at variable rotational speeds. Electricity generated by the turbine may be used to power the LEDs and controller. LED arrays can be arranged anywhere on the moving parts of the turbine.
The invention relates in particular, but not exclusively, to vertical axis wind turbines (VAWTs). An example of a VAWT is shown in
With both a VAWT and an HAWT two separate images can be viewed, if two arrays of LEDs are installed to both sides of one or more blades of the wind turbine.
The invention relates in particular, but not exclusively, to wind turbines used in urban environments as the ability to display viewable text, images and video provides a number of applications such as, but not limited to, advertisements, signs, illumination, art, decoration, etc.