# US 2013/0156943 A1 · Microcapsule color-patterning method

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- Number: US 2013/0156943 A1
- Document ID: US20130156943A1
- Status: Published application
- Kind: A1
- Application number: 13/707,663
- Filed: 2012-12-07
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Electronics and Telecommunications Research Institute
- Inventors: Kyung Soo Suh
- Web page: https://patentgrep.com/patent/US20130156943A1

## CPC

- B05D 1/286: {using a temporary backing to which the coating has been applied}
- C09B 67/0004: {Coated particulate pigments or dyes}
- C09B 67/0097: {Dye preparations of special physical nature; Tablets, films, extrusion, microcapsules, sheets, pads, bags with dyes}
- G09G 3/344: {based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167)}
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- C09B: ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES {, e.g. PIGMENTS}; MORDANTS; LAKES (fermentation or enzyme using processes to synthesise a desired chemical compound C12P)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

Provided is a color patterning method, in which electrophoretic microcapsules are used. The patterning method may include preparing a microcapsule slurry, in which electrophoretic microcapsules and a water-soluble binder are mixed, coating the microcapsule slurry on a first substrate, moving the microcapsules from the first substrate to a stamp, and moving the microcapsules from the stamp to a second substrate to form patterns. By using the patterning method, it is possible to form an intended pattern without physical and chemical damage on the microcapsules and realize an improved color electronic paper.

## Claims

### Claim 1

A microcapsule color-patterning method, comprising:
preparing a microcapsule slurry, in which electrophoretic microcapsules and a water-soluble binder are mixed;
coating the microcapsule slurry on a first substrate;
moving the microcapsules from the first substrate to a stamp; and
moving the microcapsules from the stamp to a second substrate to form patterns.

### Claim 2 (depends on 1)

The method of claim 1, wherein the stamp comprises a surface provided with patterned portions, and
the moving of the microcapsules from the first substrate to the stamp comprises moving the microcapsules from the first substrate to the patterned portions of the stamp.

### Claim 3 (depends on 1)

The method of claim 1, wherein the coating of the microcapsule slurry comprises forming the microcapsules in the form of line using a liquid ejector.

### Claim 4 (depends on 3)

The method of claim 3, wherein the forming of the microcapsules in the form of line using the liquid ejector comprises:
supplying the microcapsule slurry in the liquid ejector with an injection port and an ejecting hole; and
coating the microcapsule slurry supplied in the liquid ejector onto the first substrate.

### Claim 5 (depends on 1)

The method of claim 1, wherein the electrophoretic microcapsule comprises at least one of a black particle, a white particle, or a color particle.

### Claim 6 (depends on 5)

The method of claim 5, wherein the color particle comprises one of a red particle, a green particle, and a blue particle.

### Claim 7 (depends on 1)

The method of claim 1, wherein the water-soluble binder comprises at least one of water-soluble urethane, water-soluble acryl, water-soluble ethylene-vinyl acetate (EVA) copolymer, acrylic resin, or polyvinyl alcohol.

### Claim 8 (depends on 1)

The method of claim 1, wherein the coating of the microcapsule slurry on the first substrate comprises coating the microcapsules on the first substrate to have a single-layered structure.