OPTICAL MEMBER WITH A SCATTER LAYER, AND BACKLIGHT ASSEMBLY AND DISPLAY DEVICE HAVING THE SAME
A display device includes a backlight assembly including an optical member comprising: a base film; a plurality of linear shaped prisms disposed on the base film and extending in one direction; and a scatter layer underlying the base film and attached to the base film and comprising a coat of beads which is spread under the base film, the scatter layer having a haze value of about 10% to about 30%.
1 . An optical member comprising:
a base film;
a plurality of linear shaped prisms disposed on the base film and extending in one direction; and
a scatter layer underlying the base film and attached to the base film and comprising beads dispersed under the base film, the scatter layer having a haze value of about 10% to about 30%.
2 . The optical member of claim 1 , wherein the beads' average diameter is about 1 μm to about 7 μm.
3 . The optical member of claim 2 , wherein the beads are made of one or more of a group consisting of PolyMethylMethacrylate (PMMA), PolyStyrene, PolyCarbonate, PolyUrethane, Nylon, Poly Olefin, Silicon (Si), and Silicone.
4 . The optical member of claim 1 , wherein the thickness of the scatter layer is about 1 μm to about 10 μm.
5 . A backlight assembly comprising:
a light source;
an optical plate comprising a light incident portion for receiving light from the light source, a light emitting portion for emitting the light outside of the optical plate, and a reflecting portion disposed opposite the light emitting portion, the reflecting portion being for reflecting the light received through the light incident portion;
a first optical member disposed over the light emitting portion and comprising a first base film and a plurality of linear shaped prisms; and
a second optical member disposed over the first optical member and comprising a second base film and a plurality of linear shaped prisms,
wherein the first optical member comprises a first scatter layer underlying the first base film and attached to the first base film and comprising beads dispersed under the first base film, the first scatter layer having a haze value of about 10% to about 30%.
6 . The backlight assembly of claim 5 , wherein the light source is disposed adjacent to the light incident portion of the optical plate.
7 . The backlight assembly of claim 6 , wherein the optical plate comprises light scattering patterns on the reflecting portion.
8 . The backlight assembly of claim 5 , wherein the beads' average diameter is about 1 μm to about 7 μm.
9 . The backlight assembly of claim 8 , wherein the beads are made of one or more of a group consisting of Poly Methyl Methacrylate (PMMA), Poly Styrene, Poly Carbonate, Poly Urethane, Nylon, Poly Olefin, Silicon (Si), and Silicone.
10 . The backlight assembly of claim 5 , wherein the thickness of the first scatter layer is about 1 μm to about 10 μm.
11 . The backlight assembly of claim 9 , wherein the second optical member further comprises a second scatter layer underlying the second base film and attached to the second base film and comprising a coat of beads which is spread under the second base film, the second scatter layer having a haze value of about 10% to about 30%.
12 . The backlight assembly of claim 5 further comprising a protector sheet disposed over the second optical member, for protecting the second optical member from damage.
13 . The backlight assembly of claim 5 further comprising a reflector sheet disposed under the optical plate, the reflector sheet being for reflecting light leaked from the optical plate and re-directing the leaked light back into the optical plate.
14 . The backlight assembly of claim 5 , wherein the first optical member's prisms' ridges are substantially perpendicular to the second optical member's prisms' ridges.
15 . A display device comprising the backlight assembly of claim 5 in combination with a liquid crystal panel, wherein the optical plate is positioned in an optical path extending from the light source to the liquid crystal panel.
16 . The display device of claim 15 , wherein the light source is disposed adjacent to the light incident portion of the optical plate.
17 . The display device of claim 16 , wherein the optical plate comprises light scattering patterns on the reflecting portion.
18 . The display device of claim 15 , wherein the beads' average diameter is about 1 μm to about 7 μm.
19 . The display device of claim 18 , wherein the beads are made of one or more of a group consisting of PolyMethylMethacrylate (PMMA), PolyStyrene, PolyCarbonate, PolyUrethane, Nylon, Poly Olefin, Silicon (Si), and Silicone.
20 . The display device of claim 15 , wherein the thickness of the first scatter layer is about 1 μm to about 10 μm.