Led display device for displaying pattern on rotatable object by light-scanning

An LED display device for displaying a pattern on a rotatable object by light-scanning;

• wherein when the rotating object rotates with a high speed, the pattern will display;
• the device comprising:
• a display device for displaying at least one pattern;
• the display device being fixed without rotation in operation;
• the display screen being connected to one end of a power wire;
• the display device including a display screen, a processor and a memory;
• the processor serving to control displaying of patterns on the display device;
• the memory serving to store patterns to be displayed and other processing programs;
• a rotating printed circuit board having at least one bank of LEDs;
• the rotating printed circuit board being arranged on one side of a rotating body so that the rotating printed circuit board can be viewed easily;
• a control circuit board controlling electric conduction of each LED;
• the control circuit board having a switch bank;
• the switch bank including a plurality of switches;
• the switching operation of the switch bank being controlled by the control circuit board;
• each LED being connected to a conductive wire which is connected to one end of a corresponding switch;
• and another end of the switch being connected to a power source for supplying power to the LED to light up;
• and
• an image scanner connected to the control circuit board;
• the image scanner including a plurality of light sensors and a photoelectric converter;
• the photoelectric converter serving for converting sensed light into electric current;
• the image scanner can scan through the display screen of the display device so as to sense the pattern on the screen;
• then sensed light signals being converted into electric signals and then the electric signals being transferred to the control circuit board;
• and
• wherein the rotating printed circuit board, the control circuit board and the image scanner are arranged on the rotating body so as to rotate with the rotating body.