Method for driving two layer variable transmission display

Patent metadata

Field	Value
Publication number	US-2021263385-A1
Application number	US-202117243089-A
Country	US
Kind code	A1
Filing date	Apr 28, 2021
Priority date	May 21, 2010
Publication date	Aug 26, 2021
Grant date	—

Abstract

An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

First claim

1 . A microcavity electrophoretic display comprising walls defining at least one cavity, the cavity containing a fluid and first, second and third types of particles dispersed in the fluid, each of the first, second and third types of particles having an unshuttered state, in which the particles occupy substantially the entire area of the microcavity, and a shuttered state, in which the particles occupy only a minor proportion of the areas of the microcavity, the first, second and third particles being of differing colors and differing in dielectrophoretic and/or electro-osmotic properties such that the first, second and third types of particles can be moved between their unshuttered and shuttered states independently of one another.

2 . A microcavity electrophoretic display according to claim 1 wherein the colors of the first, second and third types of particles are such that when all three types of particles are in their unshuttered states the display appears substantially black.

Assignees

• E Ink Corp

Inventors

• Telfer Stephen J
• Paolini Jr Richard J
• Sainis Sunil Krishna
• Hill Randal M
• Moran Isaac W
• Yezek Lee
• Bouchard Alain
• Vetterling William
• Harris George G
• Morgan Hywel
• Slominski Luke
• Anseth Jay William
• Morrison Jennifer M
• Herb Craig A

Classifications

• G02F2001/1678

  characterised by the composition or particle type · CPC title

• G02F1/1676

  Electrodes · CPC title

• G02F1/167 Primary

  by electrophoresis · CPC title

• G02F1/01

  for the control of the intensity, phase, polarisation or colour  (G02F1/29, G02F1/35 take precedence) · CPC title

• G02F2203/30

  Gray scale · CPC title