Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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A Study on the Fabrication Method of Mold for 7 inch LCD-BLU by continuous microlens 200μm

연속마이크로렌즈 200μm 적용 7인치 LCD-BLU 금형개발

  • 김종선 (한국생산기술연구원 정밀금형팀) ;
  • 고영배 (한국생산기술연구원 정밀금형팀) ;
  • 민인기 (단국대학교 기계공학과 대학원) ;
  • 유재원 (단국대학교 기계공학과 대학원) ;
  • 허영무 (한국생산기술연구원 정밀금형팀) ;
  • 윤경환 (단국대학교 기계공학과 대학원) ;
  • 황철진 (한국생산기술연구원 정밀금형팀)
  • Published : 2007.02.01
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Abstract

LCD-BLU is one of kernel parts of LCD and it consists of several optical sheets: LGP, light source and mold frame. The LGP of LCD-BLU is usually manufactured by etching process and forming numerous dots with $50\sim300{\mu}m$ diameter on the surface. But the surface of the etched dots of LGP is very rough due to the characteristics of the etching process during the mold fabrication, so that its light loss is high along with the dispersion of light into the surface. Accordingly, there is a limit in raising the luminance of LCD-BLU. In order to overcome the limit of current etched dot patterned LGP, optical pattern with continuous microlens was designed using optical simulation CAE. Also, a mold with continuous micro-lens was fabricated by UV-LiGA reflow process and applied to 7 inch size of navigator LCD-BLU in the present study.

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References

  1. T. Nagahara, A. Fukui, 2001, Light-Guide Plate for Liquid Crystal Display, Matsushita Technical Journal, Vol. 47, No.3, pp. 2-6
  2. M. H., Wu., G. M. Whitesides, 2002, Fabrication of two-dimensional arrays of microlenses and their applications in photolithography, Journal of micromechanics and microengineering, Vol. 12, pp. 747-758 https://doi.org/10.1088/0960-1317/12/6/305
  3. P. Ruther, B. Gerlachy, J. Gotterty, M. Iliez, J. Mohry, A. Mullery, C. OBmanny, 1997, Fabrication and characterization of micro lenses realized by a modified LIGA process, Pure Appl. Opt. Vol. 6, pp. 643-653 https://doi.org/10.1088/0963-9659/6/6/006
  4. C. J. Hwang, Y. B. Ko, S. Y. Ha, G. H. Lee, Y. M. Heo, 2005, Micro Injection Mold Fabrication with modified LIGA Micro-lens Pattern and its application to LCD-BLU, 21st Annual Meeting of the Polymer Processing Society
  5. Zoran D. Popovic, Robert A. Sprague, G. A. Neville Connell, 1998, Technique for monolithic fabrication of microlens arrays, Applied optics, Vol. 27, No.7, pp. 1281-1284 https://doi.org/10.1364/AO.27.001281