# US 8,786,929 B2 · Components and methods for use in electro-optic displays

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- Number: US 8,786,929 B2
- Document ID: US8786929B2
- Status: Granted
- Kind: B2
- Application number: 12/959,508
- Filed: 2010-12-03
- Published: 2011-03-31
- Granted: 2014-07-22
- Earliest claimed: 2002-06-10
- Assignees: E Ink Corporation
- Applicants: Richard D. LeCain; Ara N. Knaian; Steven J. O'Neil; Gregg M. Duthaler; Guy M. Danner; Robert W. Zehner; Alberto Goenaga; Benjamin Max Davis; Randolph W. Chan; Jonathan D. Albert; Glen Crossley
- Inventors: Richard D. LeCain; Ara N. Knaian; Steven J. O'Neil; Gregg M. Duthaler; Guy M. Danner; Robert W. Zehner; Alberto Goenaga; Benjamin Max Davis; Randolph W. Chan; Jonathan D. Albert; Glen Crossley
- Web page: https://patentgrep.com/patent/US8786929B2

## CPC

- B05D 7/5483: {No curing step for any layer}
- B32B 37/12: characterised by using adhesives
- B32B 37/18: involving the assembly of discrete sheets or panels only
- G02B 1/14: Protective coatings, e.g. hard coatings
- G02F 1/1309: {Repairing; Testing}
- G02F 1/1339: Gaskets; Spacers; Sealing of cells
- G02F 1/167: by electrophoresis
- G02F 1/1675: Constructional details
- B32B 2307/202: Conductive
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- G02F 1/1681: having two or more microcells partitioned by walls, e.g. of microcup type
- G02F 2001/1678: {characterised by the composition or particle type}
- G02F 2202/28: Adhesive materials or arrangements
- G02F 2203/69: Arrangements or methods for testing or calibrating a device
- Y10T 156/10: Methods of surface bonding and/or assembly therefor
- Y10T 428/1476: Release layer
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A front plane laminate useful in the manufacture of electro-optic displays comprises, in order, a light-transmissive electrically-conductive layer, a layer of an electro-optic medium in electrical contact with the electrically-conductive layer, an adhesive layer and a release sheet. This front plane laminate can be prepared as a continuous web, cut to size, the release sheet removed and the laminate laminated to a backplane to form a display. Methods for providing conductive vias through the electro-optic medium and for testing the front plane laminate are also described.

## Claims

### Claim 1

A method of forming a sub-assembly useful in the production of an electro-optic display, the method comprising:
forming a layer of a solid electro-optic medium; and
coating a layer of an adhesive on to the layer of solid electro-optic medium;
forming a second layer of adhesive on the opposed side of the layer of solid electro-optic medium from the previously coated layer of adhesive; and contacting one of the adhesive layers with a backplane and the other adhesive layer with a light-transmissive electrode.

### Claim 2 (depends on 1)

A method according to claim 1 wherein the electro-optic medium comprises an electrophoretic medium.

### Claim 3 (depends on 2)

A method according to claim 2 wherein the electrophoretic medium comprises an encapsulated electrophoretic medium.

### Claim 4 (depends on 2)

A method according to claim 2 wherein the electrophoretic medium comprises electrically charged particles and a fluid present as a plurality of discrete droplets surrounded by a continuous phase comprising a polymeric material.

### Claim 5 (depends on 2)

A method according to claim 2 wherein the electrophoretic medium comprises a microcell electrophoretic medium.

### Claim 6

An article of manufacture comprising, in order:
a layer of a solid electrophoretic medium;
an adhesive layer; and
a release sheet;
wherein the electrophoretic medium comprises a suspending fluid and a plurality of electrically charged particles, the suspending fluid and the particles being present as a plurality of discrete droplets, the electrophoretic medium further comprising a continuous phase of polymeric material surrounding the droplets.

### Claim 7 (depends on 6)

An article of manufacture according to claim 6 wherein the electrophoretic medium comprises an encapsulated electrophoretic medium.

### Claim 8 (depends on 6)

An article of manufacture according to claim 6 wherein the electrophoretic medium comprises a microcell electrophoretic medium.

### Claim 9 (depends on 6)

An article of manufacture according to claim 6 wherein the adhesive layer comprises a heat activated adhesive.

### Claim 10 (depends on 6)

An article of manufacture according to claim 6 wherein the adhesive layer comprises a pressure sensitive adhesive.