Optical member and method for manufacturing same, backlight unit using the optical member, and method for manufacturing the backlight unit

摘要

The present invention relates to an optical member, comprising: a light incidence surface; and a light-emitting surface which comprises a patterned portion intended for adjusting the intensity of light and formed at an area corresponding to a light source, and an adhesive portion disposed in an area other than the patterned portion. When the optical member of the present invention is applied to a backlight unit, the patterned portion, which diffuses the light from the light source, is formed in the area corresponding to the light source so as to effectively diffuse the light from the light source into the peripheral area. Also, the optical member and a diffusion plate are stacked via an air layer in the area corresponding to the light source (the area in which the patterned portion is disposed), and the optical member and the diffusion plate closely contact each other without an air layer in the remaining area, such that the intensity of the light transmitted between a light source portion and the peripheral portion may be adjusted with an improvement in the balance of brightness and uniformity.

主权项

1. An optical member comprising:
a light incident side; a light outgoing side comprising a pattern part in an area corresponding to a light source and an adhesive part in an area aside from that of the pattern part, the pattern part configured to adjust the intensity of a light, the pattern part formed of a non-adhesive ink; and a spacer formed on the pattern part and having a pillar structure in order to maintain a predetermined distance between the pattern part and a film stacked thereon, wherein the spacer is formed by overlapping and patterning an ultraviolet curing ink or a phase change ink; wherein the pattern part includes a diffusion pattern formed on an entire area of the pattern part and a reflective pattern formed over the diffusion pattern, wherein the diffusion pattern is formed of a non-adhesive ink comprising at least one selected from the group consisting of titanium dioxide, Teflon, polystyrene, and silica, and wherein the reflective pattern is formed of a non-adhesive ink comprising at least one selected from the group consisting of Al, Cr, Ag, Hg, Pt, and Mo.