%0 Journal Article
%T An Analysis of Particle-clumping Phenomena of a Charged Particle-type Reflective Electronic Display
%A Young-Cho Kim
%J Transactions on Electrical and Electronic Materials
%D 2012
%I Korean Institute of Electrical and Electronic Material Engineers (KIEEME)
%X Both the electrically positive and negative particles in a cell of quick response-liquid powder display (QR-LPD) aresurrounded by conductive electrodes on the upper and lower substrate and the dielectric materials of the barrier ribs.Particles in a cell are attached to or detached from the other materials by image force, electric field, CoulombĄ¯s force,and Van der WaalsĄ¯ force. Through these forces, the moving particles form an image but induce clumping phenomena.Particles having a large kinetic energy by a large q/m value crash into the opposite electrode with high speed at a largedriving voltage and quickly lose electrically charged material. As a result, these particles are clumped and degradepanel performance. The clumped particles in a cell are observed by microscopic photographs and ascertained bya response time. When the bias voltage is increased to 0.68-0.76 V/ĻĖm, particle clumping occurs abruptly and theresponse time increases sharply. This particle clumping is similarly observed after the number of driving times at thedriving voltage (0.42-0.64 V/ĻĖm).
%K Reflective display
%K Particle-clumping
%K Force
%K Clumping process
%K q/m
%U http://dx.doi.org/10.4313/TEEM.2012.13.4.212