We analyzed various forces affective to the charged particles in closed space, to explain the image degradation and lifetime-shortening phenomena because of particle lumping which is one of the serious problems in reflective displays. It is possible to predict the quantity of q/m which is the most important parameter in determining the optical and electrical characteristics, by calculating the image force and kinetic energy. For stable driving, the quantity of q/m must be in the defined range but it changes during the fabrication process, so we added the filtering process to solve this problem and obtained the well-defined nonlinear driving voltage coinciding with the threshold voltage. And we obtained the fully-driving property which prevents the particle lumping and decides the image quality and lifetime of panel from the optical characteristics and occupation surface of moving particles.

Citations

• Reflectivity Improvement by Particle Neutralization in a Charged Particle-Type Electronic Display
  Young-Cho Kim
  Transactions on Electrical and Electronic Materials.2013; 14(1): 36.     CrossRef
• An Analysis of Driving Property of a Reflective Electronic Display Fabricated by Using Filtering Method of Non-moving Particles
  Young-Cho Kim
  Transactions on Electrical and Electronic Materials.2012; 13(5): 233.     CrossRef