Ink ribbon positioning system of a color printer

A method of identifying various positions of a color ink ribbon of a color printer, the ink ribbon of the color printer comprising a plurality of sequentially arranged color frames for storing different color dyes, a first boundary formed between a first color frame and a second color frame, a second boundary formed between the second color frame and a third color frame, the color printer comprising a thermal print head for printing the color dyes onto an object and a driving device for scrolling the ink ribbon relative to the thermal print head;

• the method comprising following steps:
• (1) emitting a first light beam through the ink ribbon;
• (2) detecting a first change of the first light beam penetrating through the ink ribbon when the first boundary moves across the print head;
• (3) emitting a second light beam through the ink ribbon;
• (4) stopping emitting the first light beam;
• (5) detecting a second change of the second light beam penetrating through the ink ribbon when the second boundary moves across the print head;
• (6) emitting the first light beam through the ink ribbon;
• and
• (7) stopping emitting the second light beam.