반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
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Adhesion Force Analysis of Charged Particles for the E-paper

  • 김승택 (한국생산기술연구원 생산시스템연구부) ;
  • 김형태 (한국생산기술연구원 생산시스템연구부) ;
  • 이상호 (한국생산기술연구원 생산시스템연구부) ;
  • 김종석 (한국생산기술연구원 생산시스템연구부)
  • Kim, Seung-Taek (Korea Institute of Industrial Technology Manufacturing System R&D Department) ;
  • Kim, Hyung-Tae (Korea Institute of Industrial Technology Manufacturing System R&D Department) ;
  • Lee, Sang-Ho (Korea Institute of Industrial Technology Manufacturing System R&D Department) ;
  • Kim, Jong-Seok (Korea Institute of Industrial Technology Manufacturing System R&D Department)
  • 투고 : 2010.11.30
  • 심사 : 2010.12.17
  • 발행 : 2010.12.31
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초록

Charged micro-particles are widely used as the key components for many electrical applications such as an e-paper, a touch panel, a printer toner and an electronic ink. Among them, the e-paper is an emerging reflective type display using the charged particles that has the advantages of the extremely low power consumption and sunlight readability. To create images on the e-paper, we confine black positively-charged and white negatively-charged particles between bottom and top electrodes and selectively apply the electric field. When the Coulomb force by an applied electric field is greater than the adhesion force between the charged particle and the electrode, the particles' transition happens resulting in the change of color between black and white. Therefore, the adhesion force is a very important factor for designing and estimating e-paper's operation. In this study, we constructed a basic model for particle's transition and an adhesion force equation describing particle's transition with three different forces: electrostatic image force, Van der Waals force and gravitational force. The simulation results showed that the gravitational force is negligible for the interesting range for the charge and the radius, and the adhesion force can be strongly dependent on the particle's charge and radius.

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참고문헌

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