Patent · US Active

Multi-color electrophoretic displays

US8797634B2 · kind B2 · utility

121Cited by

49References

17Claims

0Family size

Assignee

E Ink Holdings Inc. · TW

Inventors

Richard J. Paolini, Jr. · Framingham, US
George G. Harris · Woburn, US
Stephen J. Telfer · Arlington, US

Key dates

Filing date	Nov 18, 2011
Grant date	Aug 5, 2014
Priority date	—
Expiry date	Dec 26, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/34
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An electrophoretic display (100) has stacked first (104) and second (120) electrophoretic layers, each comprising charged particles (W, C, Y, M) in a fluid (106, 122). The first layer contains particles of white (W) and first color (M) particles and has three optical states (a) white particles adjacent a viewing surface; (b) first color particles lie adjacent the viewing surface; and (c) both types of particles shuttered to allow light to pass through the first layer. The second layer contains particles having second (C) and third (Y) colors and has three optical states (d) second particles (C) adjacent the first layer; (e) third particles (Y) adjacent the first layer; and (f) second (C) and third (Y) particles intermixed within the fluid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.