한국광학회지 (Korean Journal of Optics and Photonics)

  • 제21권2호
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  • Pages.53-60
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  • 2010
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  • 1225-6285(pISSN)
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  • 2287-321X(eISSN)
한국광학회 (Optical Society of Korea)
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광학시트를 제거한 복합 도광판 설계 연구

A Study on an Integrated Light Guide Plate

  • Lee, Yun-Mi (Department of Optical Engineering, Kongju National University) ;
  • Lee, Jun-Ho (Department of Optical Engineering, Kongju National University) ;
  • Jeon, Eun-Chae (Korea Institute of Machinery & Materials)
  • 투고 : 2010.02.23
  • 심사 : 2010.03.15
  • 발행 : 2010.04.25
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초록

본 논문에서는 휴대전화용 백라이트 유닛의 광학시트를 줄이면서도 휘도와 휘도균일도 및 시야각을 유지하기 위한 복합 도광판을 설계하고 가공하였다. 복합 도광판의 패턴은 가공성을 고려하여 윗면에는 마이크로 급의 프리즘 패턴을 형성하고 아랫면은 나노 및 마이크로 급의 크기가 다른 두 개의 음각 프리즘 패턴을 형성하였다. 이러한 패턴 형상은 금형 코어를 이용한 사출성형을 통해 복합 도광판의 가공성을 확인하였다. 특히 최적화된 복합 도광판은 프리즘 시트 한 장만을 채용하여 통상적인 백라이트 유닛과 유사한 휘도 4560 cd/$m^2$, 휘도균일도 83%, 수직 시야각 $60^{\circ}$, 수평 시야각 $56^{\circ}$라는 성과를 얻을 수 있었다. 결과적으로 도광판의 윗면과 아랫면에 복합 패턴들을 형성함으로써 기존의 백라이트 유닛에서 확산시트 및 프리즘시트 1장을 제거하여 BLU에 적용될 수 있음을 확인하였다.

An integrated light guide plate (LGP) was designed for liquid crystal displays (LCD) without using prism and diffuser sheets. The integrated LGP is textured with micro-patterns on both the top and bottom surfaces. The textures effectively substitute for a single prism-sheet and a diffuser sheet in LCD displays without decreasing the brightness and uniformity. A LCD display with our integrated light guide is simulated to give average luminance of 4560 cd/$m^2$, luminance uniformity of 83% horizontal viewing angle $60^{\circ}$ and vertical viewing angle $56^{\circ}$. Therefore an ultra thin (slim) back light unit can be constructed with fewer optical sheets, which reduces the manufacturing cost and so improves price competitiveness.

키워드

참고문헌

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피인용 문헌

  1. Study on the Optimization of the Optical Structure of Lenticular-Lens Films for LCD Backlight Applications vol.22, pp.6, 2011, https://doi.org/10.3807/KJOP.2011.22.6.247
  2. Optical characterization and manufacturing of an optical plate for increasing light efficiency of LED systems vol.16, pp.7, 2015, https://doi.org/10.1007/s12541-015-0178-y
  3. Optimization of the Dual-layer LGP for Improving Luminance and Uniformity of Edge Type Back Light Unit vol.21, pp.6, 2010, https://doi.org/10.3807/KJOP.2010.21.6.247
  4. Design of Light Guide Plate to Improve Optical Characteristics for Large-Area Edge-lit LED Display vol.9, pp.1, 2013, https://doi.org/10.9797/TSISS.2013.9.1.10
  5. A Study on Design of High Luminance Hybrid LED Package and Ultra-fine Machining of Optical Pattern vol.19, pp.8, 2010, https://doi.org/10.5228/KSTP.2010.19.8.474