| 摘要 |
An electronic LED display device for displaying a pattern on a rotatable object; wherein when the rotating object rotates with a high speed, the pattern will display; the device comprises a printed circuit board on the rotatable object is arranged with a bank of light emitting diodes; a speed detection sensor for detecting speeds of the rotatable object; a memory storing with at least one pattern and algorithms for displaying; a processor being a controlling center; the processor receiving signals from the synchronous unit; wherein the processor processing a simulation calculation for displaying the light emitting diodes by using a simulated projection line to be projected to the pattern; and a current controller receiving signals from the processor; the current controller controlling on-and-off operation of each of the light emitting diodes in the printed circuit board.
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