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http://dx.doi.org/10.3807/KJOP.2010.21.6.247

Optimization of the Dual-layer LGP for Improving Luminance and Uniformity of Edge Type Back Light Unit  

Oh, Se-Won (Department of Information and Communication Engineering, Chunbuk University)
Kim, Nam (Department of Information and Communication Engineering, Chunbuk University)
Kim, Eun-Suk (Eunsung Display)
An, June-Won (LMS)
Publication Information
Korean Journal of Optics and Photonics / v.21, no.6, 2010 , pp. 247-253 More about this Journal
Abstract
A dual-layer light guide plate (DLGP) was designed and a simulation was done to optimize the structure of the light guide plates used at backlight units while maintaining the luminance, uniformity and viewing angle by reducing the optical sheet. The characteristic of DLGP with prism pattern with curvature on the top surface is simulated and the luminance and uniformity are obtained. In order to improve the uniformity, the V groove prism pattern on the bottom surface was turned by an angle of $90^{\circ}$. In particular, we used the pitch calculation program to select the value of the ratio (Max : Min) between the pitch at the extreme outside and the pitch at the middle, the number of V groove lines and the variance at the bottom pattern of DLGP. After that, the optimum distance between V grooves was determined. For optimizing the DLGP, we examined the uniformity again by changing the number of pattern grooves on the bottom surface of DLGP. As a result of the simulation, we find that the BLU with DLGP has a uniformity of 90.6% and viewing angle $145^{\circ}$.
Keywords
Light guide plate (LGP); Backlight unit (BLU); V groove;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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