b during the plasma firing positive or negative voltages are placed on each of the top fiber 17 column electrodes 31 this voltage attracts electrons or positive ions 99 toward the electrodes 31 however the electrons or positive ions 99 are stopped by the inner surface of the plasma tube 27 where they stay and build up charge 99 as shown in fig6 c to plate out electrons 99 as shown in fig6 c a positive voltage needs to be applied to the column electrodes 31 during the plasma firing step shown in fig6 b once the charge 99 is set up on the inner surface of the plasma tube 27 and the plasma is extinguished the charge 99 remains there until it bleeds off gt 10 sec by repeating this addressing process for each of the remaining tubes 27 charge 99 can be deposited at each pixel in the panel then when the voltage on all the column electrodes 31 are grounded an electric field is set up through the electro optic material 37 gyricon paper from the charge 99 plated out in the tubes 27 to the grounded electrodes 31 this electric field causes the electro optic material 37 to be modulated.