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 ) on an opposite side of the transparent layer to the light input interface, and a plurality of protrusions ( 213 ) formed at the light output surface. Each of the protrusions is conical frustum-shaped. The light diffusion layer is integrally formed in immediate contact with the light input interface of the transparent layer. The light diffusion layer includes a transparent matrix resin ( 221 ) and a plurality of diffusion particles ( 222 ) dispersed in the transparent matrix resin.