Two-layered optical plate and method for making the same

摘要

An exemplary optical plate ( 20 ) includes a transparent layer ( 21 ) and a light diffusion layer ( 22 ). The transparent layer includes a light input interface ( 211 ), a light output surface ( 212 ) opposite to the light input interface, and plural protrusions ( 213 ) formed at the light output surface. Each of the protrusions includes two conical frustums one adjoining another. The light diffusion layer is integrally formed with the transparent layer adjacent to the light input interface. The light diffusion layer includes a transparent matrix resins ( 221 ) and plural diffusion particles ( 222 ) dispersed in the transparent matrix resins. A method for making the optical plate is also provided.