Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Study on the gate cutting of light guiding plate for mobile using quenching element

박형 도광판의 음각, 양각 마이크로 패턴 성형성에 관한 연구

  • Hwang, Chul-Jin (KITECH, Precision Dies & Molds Team) ;
  • Kim, Jong-Sun (Department of Mechanical Engineering, Dankook University) ;
  • Min, In-Gi (Department of Mechanical Engineering, Dankook University) ;
  • Kim, Jong-Dug (Department of Mechanical Engineering, Dankook University) ;
  • Yoon, Kyung-Hwan (Department of Mechanical Engineering, Dankook University)
  • 황철진 (한국생산기술연구원 정밀금형팀) ;
  • 김종선 (단국대학교 기계공학과) ;
  • 민인기 (단국대학교 기계공학과) ;
  • 김종덕 (단국대학교 기계공학과) ;
  • 윤경환 (단국대학교 기계공학과)
  • Received : 2008.06.10
  • Accepted : 2008.09.26
  • Published : 2008.10.01
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Abstract

LCD-BLU (Liquid Crystal Display - Back Light Unit) is one of kernel parts of LCD unit and it consists of several optical sheets(such as prism, diffuser and protector sheets), LCP (Light Guide Plate), light source (CCFL or LED) and mold frame. The LGP of LCD-BLU is usually manufactured by forming numerous dots with $50-200{\mu}m$ in diameter on it by erosion method. But the surface of the erosion dots of LGP is very rough due to the characteristics of the erosion 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. Especially, the negative and positive micro-lens pattern fabricated by modified LiGA with thermal reflow process was applied to the optical design of LGP.

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