Optimal Design of a Double-Side V-Groove Light Guide Plate in a LED Backlight Unit
Double-side V-groove of a light guide plate (LGP), on each side of which transverse scalene (or isosceles) and longitudinal isosceles V-groove structures respectively constructed, can be the most efficient technique for light extraction in terms of luminance performance in an edge-type LED backlight unit (BLU). In order to realistically simulate and analyze the behavior of light rays, from LEDs, inside and finally emitting from a BLU, an ASAP ray-tracing model for a LED BLU with a double-side V-groove LGP has been developed according to an algorithm which can facilitate the optimal design of a LED BLU. However, the core of the design task is to determine the base angles. Both two base angles of the isosceles V-groove structure are determined to be 47.5°. As simulaion results reveal that at least 10％ more light extraction enhancement is achieved compared to conventional medium-size edge-type BLUs. The effect of individual base angle of a transverse V-groove structure on emitting light from a LGP is investigated. The influence of pitch depth on optical performance is examined too. The simulation results are presented in this paper.
LED transverse V-groove structure backlight unit light guide plate
Chih-Chieh Kang Jeng-Feng Lin Jiun-Shian Yu Cho-Wei Chen Shi-Fu Zeng
Dept.of Electrooptical Eng., Southern Taiwan University, Yung-Kang, Tainan, Taiwan
国际会议
The 11th Asian Symposium on Information Display(ASID09)(第11届亚洲信息显示会议)
广州
英文
274-277
2009-10-07（万方平台首次上网日期，不代表论文的发表时间）