청정기술 (Clean Technology)

  • 제20권2호
  • /
  • Pages.97-102
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  • 2014
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  • 1598-9712(pISSN)
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  • 2288-0690(eISSN)
한국청정기술학회 (The Korean Society of Clean Technology)
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고효율 백색 발광다이오드 구현을 위한 고점도 형광체 정량 토출 공정 연구

A Study on High Viscosity Phosphor Dispensing Process for Implementation of High-Efficiency White LED

  • 양영진 (제주대학교 메카트로닉스공학과) ;
  • 김형찬 (제주대학교 전자공학과) ;
  • 고정범 (제주대학교 전자공학과) ;
  • 양봉수 (제주대학교 전자공학과) ;
  • 당현우 (제주대학교 전자공학과) ;
  • 도양회 (제주대학교 전자공학과) ;
  • 조경호 (제주대학교 메카트로닉스공학과) ;
  • 최경현 (제주대학교 메카트로닉스공학과)
  • Yang, Young-Jin (Department of Mechatronics Engineering, Jeju National University) ;
  • Kim, Hyung-Chan (Department of Electronic Engineering, Jeju National University) ;
  • Ko, Jeong-Beom (Department of Electronic Engineering, Jeju National University) ;
  • Yang, Bong-Su (Department of Electronic Engineering, Jeju National University) ;
  • Dang, Hyun-Woo (Department of Electronic Engineering, Jeju National University) ;
  • Doh, Yang-Hoi (Department of Electronic Engineering, Jeju National University) ;
  • Cho, Kyung-Ho (Department of Mechatronics Engineering, Jeju National University) ;
  • Choi, Kyung-Hyun (Department of Mechatronics Engineering, Jeju National University)
  • 투고 : 2013.11.12
  • 심사 : 2014.01.13
  • 발행 : 2014.06.30
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초록

현재 고효율 백색 발광다이오드(light emitting diode, LED) 구현을 위한 고점도 형광체 토출에 대한 많은 연구가 진행 중이다. 백색 발광다이오드에서 제품성능에 영향을 미칠 수 있어 고점도 형광체의 정량토출은 중요하다. 그러나 기존 연구에서 고점도 형광체 정량토출의 어려움이 있었다. 고점도 형광체의 정량토출을 위해서 본 연구에서는 다양한 점도에서 미세토출이 가능한 정전기력 프린팅 기술을 적용하였다. 전압 변화에 따른 요구 적출형(drop on demand, DOD) 토출 실험을 진행하여 토출 시 노즐의 메니스커스 각도와 토출 도트 직경 사이의 상관관계를 도출하였다. 토출 전압이 증가함에 따라, 토출 메니스커스 각도는 증가하고 토출 도트 직경은 감소하였다.

Currently various studies are underway for dispensing high-viscosity phosphor. These studies have reported limitations and challenges in the dispensing process. The discharged amount of phosphor was approximately the same each time which is important for the implementation of high-efficiency white LED technology. This paper present high-viscosity phosphor dispensing process for white LED implementation by using electrostatic printing technology. The voltage controlled DOD (Drop-On-Demand) discharge experiment was studied to determine angle of drop meniscus at nozzle and dot diameter. With increase in Discharge voltage, the discharge angle of meniscus increased while dot diameter decreased. Therefore it can be concluded that we can control the discharge rate by controling the discharge angle of meniscus.

키워드

참고문헌

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피인용 문헌

  1. Fine Dispensing Process of High Viscosity Phosphor for Repairing Application of White LED vol.25, pp.2, 2016, https://doi.org/10.7735/ksmte.2016.25.2.124