| 摘要 |
PURPOSE: A back light device of a prism method and a method for manufacturing the same are provided to improve a viewing angle of a light guide plate, improve brightness of the light guide plate, and replace a prism film by prism threads inducing and condensing a light. CONSTITUTION: A plurality of V-shaped prism threads(30) are firstly engraved on the rear surface of a light guide plate(20) to reflect an incident light entered from a plurality of light sources(10) located on one side to a front surface. The engraved prism threads are secondly engraved. An inclined surface of each prism thread is mirror-surface processed. A reflective plate(40) is arranged on the rear surface of the light guide plate for reflecting the light emitted from the light guide plate. |
