Abstract: A method for manufacturing a polarizer sheet includes: preparing a light transmission film where a metal thin film is formed, and forming metal patterns by irradiating a polarized pulse laser beam onto a plurality of regions of the metal thin film.

Abstract: A backlight unit capable of enhancing a luminance of an LCD is provided. The backlight unit includes a lamp for emitting light, a light guide plate for guiding the light emitted from the lamp, and an optical sheet disposed on a path of the light emitted from the light guide plate. The optical sheet includes a prism sheet having a plurality of prisms of which apex angles are obtuse, and a reflective polarizer film for reflecting and transmitting the light emitted from the prism sheet according to polarization components.

Abstract: A method for manufacturing a color filter by thermal transfer using a laser beam with uniform energy distribution. The method includes forming a black matrix pattern on a substrate by photolithography. A transfer film having thermal color layers is placed on the substrate, and a laser beam with uniform energy distribution irradiates the transfer film to transfer the color layers onto the substrate. The substrate onto which the color layer has been transferred, is cured at 200˜300° C. Therefore, by using the laser beam with uniform energy distribution, or a laser beam which scans by dithering, for the thermal transfer, the quality of an image formed at the edges of the is improved and the surface roughness is reduced, resulting in an excellent color filter.