Abstract: A laser irradiation apparatus includes a plurality of laser heads from which a laser is irradiated, can adjust arranged intervals of the laser heads, and moves freely to irradiate the laser along a shape of a subject. A laser oscillator oscillates a laser. A plurality of laser heads linearly irradiate the laser oscillated by the laser oscillator. A first driving means adjusts arranged intervals of the laser heads, and moves the laser heads in an X direction. A second driving means moves the laser heads in a Y direction different from the X direction.

Abstract: Disclosed is a frit sealing apparatus and method of using the same, the apparatus being capable of irradiating infrared rays only to a frit portion of a substrate. The apparatus includes a first chamber, a second chamber positioned inside the first chamber, a lamp positioned inside the second chamber, a stage positioned outside the first chamber to receive and fix a first mother substrate and a second mother substrate, an emitting part formed in the first chamber and the second chamber and positioned to direct heat supplied by the lamp to the stage. The apparatus also includes a mask positioned over the substrates, the mask including one or more transmitting portions positioned over regions containing the frit, and one or more interrupting portions positioned at other regions.