48.5: Roll-to-Roll Manufacturing Process for Full Color Electrophoretic Film

Abstract

We report the process development work on roll‐to‐roll fabrication of EPD film that enables the making of full color EPD display. Through the incorporation of inkjet printing process, Microcup® web can be printed with colored fluids to form designated color pattern at sub pixel level. Existing roll‐to‐roll Microcup® EPD manufacturing process can be modified to accommodate the printing step and the processes can be coordinated in such to prevent the mixing of different colored fluids during web processing.

Bistable and Reconfigurable Photonic Crystals—Electroactive Shape Memory Polymer Nanocomposite for Ink‐Free Rewritable Paper

“…Recent attempts to create and popularize rewritable paper can greatly lessen the heavy environmental burden brought about by traditional pulp and paper industry . Currently, paper‐replacement effort is developing around several distinct technologies: electrophoretic inks, electrowetting inks, cholesteric liquid crystals, reprintable coatings on paper, and responsive photonic crystals . Microencapsulated electrophoretic display was first introduced by an MIT group in 1998, which quickly enabled the commercially successful, monochromic e‐readers popular for their low power consumption due to its bistability and paper‐like legibility under illumination.…”

“…A reliable full‐color electrophoretic e‐paper with simple fabrication process is yet to be achieved . Current proposals either suffer from significant reflected light intensity loss due to color filters or require complex manufacturing processes to create subpixels with different colors and convoluted charging system . Electrowetting displays are another commercialized electronic paper that was invented by Liquavista in 2003 .…”

Review Paper: A critical review of the present and future prospects for electronic paper

“…57 While in principle it is possible to use combinations of colored pigments to generate full color, these approaches have not yet been successful in generating color approaching print-on-paper in actual displays. 58,59 The most successful implementation of color displays to date has used a black and white particle EPD with a RGBW color filter [Figs. 2(b) and 4(c)].…”

Application of Transparent Amorphous Oxide Thin Film Transistors to Electronic Paper

“…There are several ways to realize full color. One way is to use three combinations of two-color electrophoretic fluids to express red, green and blue [27]. However, in this way, a complicated patterning of subpixels and each color fluid is required.…”