| Summary: | 碩士 === 國立高雄第一科技大學 === 光電工程研究所 === 95 === Two types of backlight module designs mixing RGB LEDs emission without light guide are proposed as a new promising approach to achieve low cost, high efficiency and light weight in this work. Both elliptical curved reflecting surface and lens are adopted with RGB LEDs to replace the traditional light guide and light source of CCFL in the simulation model of proposed backlight module built in the optical simulation software ASAP (Advanced System Analysis Program). Other parameters such as Camber of the lens, elliptical reflecting curved surface, quantity and position of LEDs, roughness of the reflecting surface and mask yardstick are considered in order to improve the degree of uniformity and emission efficiency. The results of simulation by Taguchi method shown that (1) The model using lens gives 80.00% of degree of uniformity and 51% of emission efficiency, (2) the model using elliptical reflecting curved surface gives 82.30% degree of uniformity and 92% of emission efficiency, and thus (3) an elliptical reflecting curved surface with LED light source is effective for mixing RGB LEDs and efficient emission without light guide.
Include and use white light LED and use R.G.B. LEDs to mix all design while analysing in 10 inches of backlight module. 17 inches of backlight module, include and use R.G.B. LEDs to mix all design and useless width of reduction, the final result nearly has 80% of the degrees of uniformity and 80% efficiency .
|
|---|
