Fan blade sign display device

Abstract

A fan blade sign display device includes a rotary device, an actuator adapted to rotate the rotary device, a display unit installed in the rotary device, and a control device adapted to turn on/off the display unit. A sign is appeared in the movement path of the LED array upon rotation of the LED array with the rotary device at the speed in which the motion cycle of the LED array is smaller than the transient retention time of visual sensation when controlling the control device to turn on/off the display unit.

What the invention claimed is:  
     
         1 . A fan blade sign display device comprising: 
 a rotary device;    an actuator adapted to rotate said rotary device;    a display unit installed in said rotary device; and    a control device adapted to turn on/off said display unit;    wherein a sign is appeared in the movement path of said LED array upon rotation of said LED array with said rotary device at the speed in which the motion cycle of said LED array is smaller than the transient retention time of visual sensation when controlling said control device to turn on/off said display unit.    
     
     
         2 . The fan blade sign display device as claimed in  claim 1  wherein said actuator is a motor.  
     
     
         3 . The fan blade sign display device as claimed in  claim 1  wherein said rotary device is a fan blade.  
     
     
         4 . The fan blade sign display device as claimed in  claim 1  wherein said display unit is comprised of a LED (light emitting diode) array.  
     
     
         5 . The fan blade sign display device as claimed in  claim 1  wherein said control device is comprised of a power supply unit and a driving unit.  
     
     
         6 . The fan blade sign display device as claimed in  claim 5  wherein said power supply unit comprises a speed stabilizing circuit adapted to control the speed of revolution of said rotary device.  
     
     
         7 . The fan blade sign display device as claimed in  claim 1  wherein said driving unit comprises software adapted to control on/off of said display unit.