Three-dimensional printing apparatus using DLP projector with laser scanner

A three-dimensional printing apparatus using a digital light processing (DLP) projector with a laser scanner, the apparatus comprising:

• a resin storage unit storing a photocurable resin;
• a DLP projector unit disposed above the resin storage unit and projecting light corresponding to a core portion of an axial cross section of a sculpture to the resin storage unit;
• a molding stage unit provided to be capable of being lifted and lowered in a vertical direction from a bottom of the resin storage unit, wherein the sculpture is formed on an upper side portion thereof;
• a laser scanner unit disposed above the resin storage unit and performing scanning of light corresponding to a shell portion of the axial cross section of the sculpture for the resin storage unit in a y-axis direction;
• a scanner transfer unit supporting and transporting the laser scanner unit, thereby allowing the laser scanner unit to move in an x-axis direction;
• an image processing unit dividing one sectional image of the sculpture into the core portion and the shell portion;
• and
• a controller receiving data on the core portion from the image processing unit, thereby outputting the data on the core portion to the DLP projector unit, receiving data on the shell portion from the image processing unit, on the basis of the data on the shell portion input thereto, controlling the laser scanner unit and the scanner transfer unit, and lifting and lowering the molding stage unit on the basis of data of the sculpture,
• wherein the image processing unit sets an overlap portion so that the shell portion and the core portion are slightly overlapped at an interface thereof, and
• wherein the data on the shell portion is obtained by adding the shell portion and the overlap portion, and the data on the core portion is obtained by adding the core portion and the overlap portion.