Three dimensional pattern printing device and method for manufacturing micro-optical film structure by using same

A stereoscopic pattern printing apparatus comprising:

• a base roller and a retrieving roller respectively providing and retrieving a base film;
• a backup roller disposed in front of the base roller and moving the base film, a lower surface of the base film being attached to the backup roller;
• a printer disposed at a side of the backup roller, and transferring an ink on an upper surface of the base film attached to the backup roller as a fine pattern;
• and
• a convex pattern hardening roller disposed between the printer and the retrieving roller, and forming an upper hardening layer on the upper surface of the base film, a convex lens being uniformly formed on the upper hardening layer,
• wherein the printer comprises:
• a blanket roller disposed at a side of the backup roller so as to be adjacent to the upper surface of the base film;
• an ink nozzle coating an ink on the blanket roller;
• a cliché roller making contact with an outer surface of the blanket roller, the ink coated on the blanket roller being transferred to the cliché roller;
• and
• a cleaner cleaning the cliché roller,
• wherein the fine pattern is engraved on the cliché roller.

A method for manufacturing a micro-optical film structure comprises:

• forming a fine pattern on the base film;
• forming an upper hardening layer on the baser film on which the fine pattern is formed;
• and
• forming a convex lens pattern aligned with the fine pattern, via imprinting the upper hardening layer,
• wherein said forming the fine pattern comprises:
• forming a lower hardening layer on the base film;
• forming an imprint pattern, via imprinting a first pattern roller having a fine pattern embossed on the first pattern roller, on the lower hardening layer, to form concave patterns on the lower hardening layer;
• and
• forming filling an ink to the concave patterns of the lower hardening layer,
• wherein said forming the convex lens pattern comprises:
• forming the upper hardening layer on the lower hardening layer;
• and
• forming an imprint pattern, via imprinting a second pattern roller having a concave lens pattern on the second pattern roller, on the upper hardening layer, to form a convex lens on the upper hardening layer, and
• wherein the convex lens is formed over the fine pattern continuously.