53.1: Active‐Matrix Color Displays Using Electrophoretic Ink and Color Filters

Abstract

In this paper, we describe the first research prototypes of 5.0" diagonal QVGA active-matrix driven microencapsulated electrophoretic displays that utilize color filter arrays to produce color images.We report on the performance of the electrophoretic ink material and the color filter used in the display, and discuss the method by which the display was integrated to within required tolerances. The color display exhibits "paper-like" optics, in that the brightness and saturation of the optical states are largely independent of viewing or illumination conditions.

Synthesis and Properties of Latent Pigment Nano- and Micro-encapsulated in High-durability Inorganic Capsules

“…To prepare inorganic MCs with high durability, PTES (C 6 H 5 Si(OC 2 H 5 ) 3 ) is used as a starting material, and an inorganic-polymer precursor (in which a phenyl group is bonded to a siloxane skeleton) is synthesized by the sol-gel method with an acidic catalyst using HCl. Then, MCs are formed by developing this precursor in NH 4 OH (which is a basic catalyst).…”

“…Three primary-color pigments, namely, quinacridone-BOC (for magenta), indigo-BOC (for cyan), and Pigment Yellow 93-BOC (PY-BOC) (for yellow), were selected for the latent pigmentation. In the three kinds of latent pigments, the hydrogen of the N-H group in each organic pigment molecule was substituted with a t-BOC (COOC(CH 3 ) 3 ) group, and all three kinds were soluble in an organic colored with the three primary-color materials, namely, red-purple (quinacridone, Qn), blue (indigo), and yellow (PY93), were obtained. It is clear that colors of the MCs differ considerably before and after the heat treatment and that the pigment is formed inside the MCs due to the heat treatment.…”

“…In particular, as for microencapsulation of functional organic dyes, it is expected to be applied to, for example, display materials, information-recording materials, microsphere lasers, biomaterials such as drug delivery system and in-vivo fluorescent dye materials, and it is a field in which great development is expected in the future [1][2][3][4][5][6][7][8][9][10][11][12][13]. Conventionally, MCs of functional organic dyes have a structure in which an organic dye forms a core that is encased by an organic-polymer shell.…”

Mobility of black pigments for electrophoretic display depending on the characteristics of carbon sphere

“…At the initial stage of development, a colored particle with a dye solution was used for the monochromic display [5]. Recently, more than two types of particles have commonly been applied for the enhancement of contrast ratio and response time [4], the color realization [6] and the delicate control of display. Black and white particles with opposite sign of charge are used for the monochrome display.…”

Development of a Flexible Color A4 Size e-Paper Using a Thin Metal Foil and a Plastic Substrate

“…Among the various paper-like display manufacturing technologies, there have been considerable interests and technical achievements in the microencapsulated electrophoretic displays (EPD) [2,3].…”