Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Fabrication and Characterization of Film Type Light Guide Plates by UV Imprint Lithography

UV 임프린팅법에 의한 필름형 광도광판의 제조 및 특성 연구

  • Kim, Hyeong-Gwan (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Kim, So-Won (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Lee, Hee-Chul (Department of Advanced Materials Engineering, Korea Polytechnic University)
  • 김형관 (한국산업기술대학교 신소재공학과) ;
  • 김소원 (한국산업기술대학교 신소재공학과) ;
  • 이희철 (한국산업기술대학교 신소재공학과)
  • Received : 2016.02.13
  • Accepted : 2016.04.12
  • Published : 2016.04.30
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Abstract

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 $950cd/m^2$ 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.

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References

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