Patent ID: 8699002
Filing Date: 2014-04-15
Classification: G03B

Abstract:
1. A laser irradiation device, comprising: a laser source to generate a laser beam; a projection lens arranged at a lower portion of the laser irradiation device; and a mask pattern arranged between the laser source and the projection lens, the mask pattern including a transmissive region and a non-transmissive region, wherein a surface of the mask pattern facing the laser source has a first inclined angle with respect to an optical axis of a laser beam, and wherein the mask pattern includes a reflective layer on the non-transmissive region of the surface of the mask pattern that faces the laser source, wherein the transmissive region of the mask pattern includes an aperture of which a side surface has a second inclined angle with respect to the surface of the mask pattern, wherein the first inclined angle is equal to the second inclined angle, wherein the first and second inclined angles are 1 to 45 degrees.