Backlight system and liquid crystal display using the same

摘要

A backlight system ( 100 ) in accordance with the present invention includes a plurality of light sources ( 110 ) for emitting light beams and a light guide plate ( 120 ) for receiving the light beams emitted by the light sources. The light guide plate includes a light input surface ( 121 ) and a light output surface ( 122 ) joining the light input surface. The light input surface has a plurality of recesses ( 124 ) therein. The recesses have cylindrical surfaces, each having a specific curvature, and the light beams emitted by the light sources pass through the cylindrical surfaces orthogonally. Since nearly all of the light beams enter into the light guide plate with few being reflected at the light input surface, the backlight system is highly efficient in light utilization.