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Optical Characteristics and Measurement System of Charged Particle Type Display

대전입자형 디스플레이 소자의 측정시스템 및 광학특성

  • 김백현 (청운대학교 대학원 전산전자공학과) ;
  • 김성운 (서울시립대학교 전기전자컴퓨터공학부) ;
  • 이상국 (한국생산기술연구원 환경에너지본부 청정-화학소재팀) ;
  • 김영조 (청운대학교 대학원 전산전자공학과)
  • Published : 2008.02.28

Abstract

We fabricated the 4 channel wave function generator with variable frequency, pulse width, amplitude and rising/falling slope to develop driving method of charged particle type display. The selective sell driving is ascertained by fabricated panel with black and yellow particles. To measure CIE point, reflectivity, contrast ratio and viewing angle, experimental apparatus is integrated with optical circular$(1^{\circ})$ moving emitting/receiving part and spectrometer connected to emitting part. The yellow particles in glass have reflectivity of $35{\sim}40%$ and wavelength of 571.2nm and black one has reflectivity of $15{\sim}20%$ in case of only 1 layer of particle, and the case of 3 layer the optical property is promoted.

대전입자형 디스플레이 소자의 구동을 위하여 주파수, 펄스폭, 진폭, 경사 등을 구현하기 위한 4채널 파형발생기를 제작하였으며, 이 파형발생기로 노란색과 검정색으로 제작한 패널의 선택적 셀구동 신호를 확인하였다. $1^{\circ}$ 간격으로 동작하는 광방출부와 수광부, 광방출부의 분광기 연결이 구비된 집적화된 실험장치로부터 CIE 특성, 반사율, 대조비, 시야각을 측정하였으며 1 layer 입자충전일 경우 노란색은 $35{\sim}40%$, 검정색인 경우 $15{\sim}20%$의 반사율을 가지며, 노란색의 색좌표를 확인하였고 파장은 571.2nm였다. 3 layer 입자충전의 경우 광학특성은 향상됨을 확인하였다.

Keywords

References

  1. R.Hattrori, S.Yamada, Y.Masuda, N.Nihei and R.Sakurai, "Ultra Thin and Flexible Paper-Like Display using QR-LPD Tehnology," DIGEST O4,oo. 136-139, (2004).
  2. Takashi Kitamura, "Electronic Paper Based on particle Movement Electrophoretic and Toner Display."IDW 06, pp.587-589, (2006).
  3. M.Omoani,"Flexible Display are Expected to Create Novel Fields for Visual information," J. of the institute of image information and TelevisionEngineer 1256-1261, (2005).
  4. I. Shiyanovskaya, A. Khan, S. Green, G. Magyar and J. W. Doane, "Single Substrate Encapsulated Cholesteric LCDs: Coatable, Drapable and Foldable" SID Symposium Digest, pp. 1566-1559, (2005).
  5. H. Fujikake, T. Murashige, H. Sato, H. Kikuchi, T. Kunita and Y. Suzuki, "Fabrication of Single-Substrate Liquid Crystal Devices Using Two-Step Coating Process" Euro Display Symposium Digest, pp. 510-513, (2005).
  6. M. Omodani, "Flexible Displays are Expected to Create Novel Fields for Visual Information" J. of The Institute of Image Information and Telvision Engineers, pp. 1256-1261, (2005).
  7. Y. Masuda, Y. Sakurai, N. Nihei and R. Hattori, "Novel Type of Multi-Stable Reflective Display Using Electric Powder" Proc. of IDW Symposium, pp. 821-824, (2005).
  8. S.H. Kwon, S.G. Lee, W.K. Cho, B.G. Ryu and M.B. Song, ""Reflective Paper-Like Display using Oppsite-Charged Two Particles,"" The 6th IMID''05 Diges, pp.423(2005)
  9. W.K. Cho, S.H. Kwon, S.G. Lee, N.J. Kim, B.G. Ryu and M.B. Song, ""Development of Reflective Paper-Like Display with Tribo-electrically Charged- Polymer Particles,"" JID, vol.6, no.3, 2005