Patent ID: 7875828

Claim:
A laser irradiation apparatus comprising: a laser oscillator for oscillating a laser; a plurality of laser heads for linearly irradiating said laser oscillated by said laser oscillator; a first driving means for adjusting arranged intervals of said laser heads, and for moving said laser heads in an X direction; and a second driving means for moving said laser heads in a Y direction different from the X direction, the first driving means comprising: a cross hanger including a plurality of units having an X shape, which continue to be linked for connecting said laser heads to each other; a first lead screw formed to penetrate a subset of said plurality of laser heads; at least one first guide bar disposed to penetrate said plurality of laser heads and parallel with said first lead screw; a first motor for rotating said first lead screw; a second lead screw disposed to penetrate the remaining subset of said plurality of laser heads and on an extension line of said first lead screw; a second guide bar formed to penetrate said plurality of laser heads and parallel with said second lead screw; and a second motor for rotating said second lead screw.