Method of forming an electrophoretic display having a color filter array

Patent metadata

Field	Value
Publication number	US-11520179-B2
Application number	US-202016794347-A
Country	US
Kind code	B2
Filing date	Feb 19, 2020
Priority date	Sep 3, 2002
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

The invention provides an electrophoretic medium comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors. The invention also provides article of manufacture comprising a layer of a solid electro-optic medium, a first adhesive layer on one surface of the electro-optic medium, a release sheet covering the first adhesive layer, and a second adhesive layer on an opposed second surface of the electro-optic medium.

First claim

The invention claimed is:

1. A process for forming a reflective electrophoretic display, the process comprising:
providing a color filter array;
providing an electrophoretic medium comprising a plurality of capsules, each capsule comprising
a suspending fluid,
a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the suspending fluid, and
a capsule wall surrounding the suspending fluid and the electrically charged particles;

depositing the electrophoretic medium on the color filter array to form a coated color filter array; and
thereafter laminating the coated color filter array to a backplane comprising at least one pixel electrode, wherein the electrophoretic medium is disposed between the color filter array and the backplane.

2. A process according to claim 1 wherein a surface of the color filter array is surface treated prior to depositing the electrophoretic medium on the color filter array to produce regions of varying surface energy on the surface.

Assignees

• E Ink Corp

Inventors

• Duthaler Gregg M
• Amundson Karl R
• Comiskey Barrett
• Goenaga Alberto
• Ritter John E
• Steiner Michael L
• Zehner Robert W

Classifications

• G02F2001/1678

  characterised by the composition or particle type · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/167 Primary

  by electrophoresis · CPC title

• G02F1/133354

  Arrangements for aligning or assembling substrates · CPC title

• G02F1/133516

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title