| 摘要 |
PURPOSE: An optical film having a scattering pattern is provided to increase light efficiency and minimize light deviation by equalizing the brightness value of the whole surface of a light guide plate from a light source, and increase the shielding power by minimizing the loss of the brightness value, thereby producing a back light assembly applying to the optical film. CONSTITUTION: An optical film(200) includes a material layer(210) penetrating light which comes from the outside and a pattern layer(220). The pattern layer forms multiple optical patterns(222) and a scattering pattern(230) to minimize the loss of the brightness value at the space between the optical patterns or on the surface. The scattering pattern embossed on the optical patterns maximizes a shielding effect while maintaining the property for brightness. |
