Advanced SearchSearch Tips
Fabrication and Characterization of Film Type Light Guide Plates by UV Imprint Lithography
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Fabrication and Characterization of Film Type Light Guide Plates by UV Imprint Lithography
Kim, Hyeong-Gwan; Kim, So-Won; Lee, Hee-Chul;
  PDF(new window)
In this study, we have fabricated light guide plates (LGPs) in thin film form for edge type back light unit (BLU) by using UV imprint lithography. In the LGPs, the pattern of functional resins on PC and PMMA substrates were successfully transferred from original master mold through PVC stamp. Optimized pattern arrays with slowly-sloped density were designed to obtain high brightness and uniformity. We could obtain a relatively improved brightness of and a uniformity of 87.3% by using the NP-S20 functional resins at an input power of 1.3 W because NP-S20 resin could show high formability after UV hardening process. The LGP prepared on polymethylmethacrylate (PMMA) substrate exhibited higher brightness than that on polycarbonate (PC) substrate because PMMA has lower refractive index resulting in more refraction toward the vertical direction.
Light guide plates;Functional resin;BLU;Hot embossing;Imprint lithography;
 Cited by
B. -H. Hong, Technology trend of backlight for LCD, J. Kor. Inst. Electr. Electron. Mater. Eng., 17 (2004) 3-9.

J. -M. Han, J. -G. Shon, High Brightness Prism Light-guide Plate for TFT-LCDs Using Optical Simulation and Novel Injection Mold Process, Trans. Kor. Inst. Electr. Eng., 61 (2012) 93-96.

C. -Y. Kim, Technology trend of backlight unit materials, Kor. Info. Display. Soc., 6 (2005) 5-10.

J. -J. Lee, S. -Y. Park, K. -B. Choi and G. -H. Kim, Nano-scale patterning using the roll typed UV-nanoimprint lithography tool, MicroElec. Eng., 85 (2008) 861-865. crossref(new window)

E. -S. Park, T. -J. Je, H. -J. Choi, E. -C. Jeon, M. -C. Kang, Wear characteristics of V shape diamond tool for micro prism pattern with Al alloys, Trans. Nonferrous Met. Soc. China, 22 (2012) s769.-s774 crossref(new window)

J. -C. Yang, C. -C. Huang, Fabrication of dual brightness enhancement structures on light guide plates using UV roll-to-plate imprinting lithography, Optik, 124 (2013) 3324-3328. crossref(new window)

G. -S. Lee, J. -H. Jeong, S. -J. Yoon, D. -H. Choi, An integrated design approach for Light Guide Panel (LGP) of Back Light Unit (BLU) to improve the Optical Performance of Liquid Crystal Display (LCD), Optical Eng., 48 (2009) 1048-1052.

C. -J. Li, Y. -C. Fang, M. -C. Cheng, Prismpattern design of an LCD light guide plate using a neural-network optical model, Optik, 121 (2010) 2245-2249. crossref(new window)

C. -F. Lin, Y. -B. Fang, P. -H. Yang, Optical film with microstructures array for slim-type backlight applications, Optik, 122 (2011) 1169-1173. crossref(new window)

Y. -C. Kim, LGP pattern design with single LED light source, Optik, 125 (2014) 1341-1345. crossref(new window)

S. -W. Oh, N. Kim, E. -S. Kim, J. -W. Ahn, Optimization of the Dual-layer LGP for Improving Luminance and Uniformity of Edge Type Back Light Unit, Kor. J. Optics. Photonics, 21 (2010) 247-253. crossref(new window)

Y. -C. Kim, D. -W. Kim, T. -S. Oh, Y. -M. Lee, S. -J. Ahn, H. -S. Kim, LGP Pattern Design by Using a Pattern Density Function with Simple Exponential Function, Kor. J. Optics. Photonics, 21 (2010) 97-102. crossref(new window)

P. -H. Huang, T. -C. Huang, Y. -T. Sun, S. -Y. Yang, Fabrication of large area resin microlens arrays using gas-assisted ultraviolet embossing, Optics. Express, 16 (2008) 3041-3048. crossref(new window)

G. -H. Kim, W. -J. Kim, S. -M. Kim, J. -G. Son, Analysis of thermo-physical and optical properties of a diffuser using PET/PC/PBT copolymer in LCD backlight units, Displays, 26 (2005) 37-43. crossref(new window)