OPTICAL ELEMENT PROVIDED WTH DIFFUSION BEAD, BACKLIGHT UNIT HAVING SAME, AND LIQUID CRYSTAL DISPLAY

摘要

The present invention relates to an optical element that is used in a backlight unit. The present invention comprises: a base film that is transparent to light; a fine optical pattern that is provided on one face of said base film and has a plurality of continuous peaks and valleys to focus incident light; and at least one diffusion bead comprising an inner substance and an outer substance surrounding the inner substance, and coated on the valleys of said fine optical pattern so that cracks in the peaks caused by friction with another optical device laminated onto said fine optical pattern may be prevented and incident light may be refracted by the difference in refractive indices and reflected vertically. Therefore, the present invention has the advantage of appropriately maintaining luminance by the difference in refractive indices between the diffusion bead and resin, while also preventing cracks in the peaks caused by friction with another optical device, thereby preventing wet-out phenomena.