||The manufacturing technology of LCD is becoming skillful gradually and begins to popularize in recent years, and its relevant component is developed vigorously accordingly. In the numerous key components of LCD, back light module(BLM) is easiest to make, but its cost accounted is very high in specific gravity, so it attracts large quantities of manufacturers to plunge into the relevant studies. However, so far, most of studies concentrate on the light guide plate and the diffuser sheet, there are seldom researches corresponding to the brightness enhancement of the back light module while is relating to the prism sheet(brightness enhancement film, BEF). Therefore, this thesis will focus on the constructing of the optical module of the prism sheet and the effects of the prism sheet’s structure parameter on the brightness enhancement.|
By utilizing optics simulation software ASAP to build and construct out the prism sheet optics module, one can analyze and discuss the effect of the variation of its structure parameter, such as prismatic degree(θ), prismatic structure(t), polyester substrate(T) and the refract rate of bottom sill on the brightness enhancement. It can be found from the result of simulation, relative to other structure parameter, the changing of the prismatic degree(θ) influence the brightness enhancement the most, and have the best result on 104 degree.