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http://dx.doi.org/10.5228/KSPP.2008.17.5.322

A Study on the Improvement of Optical Efficiency for The 2 inch LGP Considering Injection Molding Characteristics  

Do, Y.S. (한국생산기술연구원 정밀금형팀)
Hwang, C.J. (한국생산기술연구원 정밀금형팀)
Yoon, K.H. (단국대학교 기계공학과)
Publication Information
Transactions of Materials Processing / v.17, no.5, 2008 , pp. 322-327 More about this Journal
Abstract
LGP is a key component of LCD back light unit because it determines brightness and sharpness of the display image. Usually, it has optical patterns fabricated on the bottom surface. These optical patterns convert point or line sources placed in the side of LGP to plane source at the top surface by changing the propagating direction of the incident light. In the present paper the LiGA-reflow method was applied to fabricate the LGP mold. Furthermore, the optical simulation considering the replication ratio of pattern height was applied to the pattern design. The optical simulation through systematic correction scheme was adopted to find the optimum distribution of pattern density. Finally, the stamper fabricated by this method was installed in the mold and LGP was produced by injection molding. As a result of luminance measurement for the final product, the average luminance and luminance uniformity was measured 3,180 nit and 84%, respectively. Consequently, the mold fabrication method using the LiGA-reflow and optical simulation(CAE) can save the expense and time compared with the existing fabrication methods(laser ablation and chemical etching).
Keywords
Injection Molding; BLU(Back Light Unit); LGP(Light Guiding Plate); Optical Pattern; LiGA-Reflow; Optical Simulation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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