PaperDisplay’s products are based on Acreo’s patented electrochemical (EC) paper electronics technology. In this technology the display element is structured as an electrochemical cell with an active electrode (pixel) and a counter electrode, in contact with a solid electrolyte (proprietory). The electrodes which are made from PEDOT-PSS serves both as electrochromic material and electrical conductor. Both lateral and vertical designs are possible. In the schematic drawing the lateral design is shown. The paper display is partly bi-stable which means that once it is switched it only takes a small sustain current to keep it updated. A slightly modified label printing press is used for manufacture the paper displays . Optional printing steps can be used for the graphic appearances. The printing speed is 5 to 20 m/min but it has a potential to be increased to more than 100 m/min.
