| 摘要 |
The present invention relates to a direct surface light source device having improved luminescence and uniformity of luminescence. An intaglio cone-shaped reflective pattern and an intaglio circular cone-shaped lens pattern are formed on the upper side and the lower side of a light guide plate on which a light diffusion pattern is formed. A reflective layer is arranged on the lower side of the light guide plate. A reflective sheet having a predetermined size is arranged on the cone-shaped reflective pattern. A light source is arranged inside the intaglio cone-shaped lens pattern. The direct surface light source device can reduce the thickness thereof and increase light luminescence and light efficiency dramatically using a small number of light sources compared to the existing direct surface light source device, by converting and emitting the light of the light source introduced to the inside of the light guide plate into a surface light source through total reflection and diffused reflection. |
