# US 8,541,938 B2 · Electronic paper display device and method of manufacturing the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,541,938 B2
- Document ID: US8541938B2
- Status: Granted
- Kind: B2
- Application number: 13/153,917
- Filed: 2011-06-06
- Published: 2012-06-07
- Granted: 2013-09-24
- Earliest claimed: 2010-12-07
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Sang Moon Lee; Young Woo Lee; Choong Hee Lee; Sang Jin Kim; Hwan-Soo Lee
- Inventors: Sang Moon Lee; Young Woo Lee; Choong Hee Lee; Sang Jin Kim; Hwan-Soo Lee
- Web page: https://patentgrep.com/patent/US8541938B2

## CPC

- G02B 26/026: {based on the rotation of particles under the influence of an external field, e.g. gyricons, twisting ball displays (based on orientable dipolar particles G02F1/172; based on electrophoresis G02F1/167)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

There are provided an electronic paper display device and a method of manufacturing the same. The electronic paper display device includes: a lower substrate having lower barrier ribs formed thereon, the lower barrier ribs forming cells for receiving electronic paper display elements; electronic paper display elements mounted in the cells of the lower substrate and having optical and electrical anisotropy; and an upper substrate formed to cover the lower substrate and including upper patterns bonded to the lower barrier ribs so as to secure a fluid moving path of the cell.

## Claims

### Claim 1

An electronic paper display device comprising:
a lower substrate having lower barrier ribs formed thereon forming cells for receiving electronic paper display elements;
electronic paper display elements mounted in the cells of the lower substrate and having optical and electrical anisotropy; and
an upper substrate formed to cover the lower substrate and including upper patterns bonded to the lower barrier ribs so as to secure a fluid moving path of the cell.

### Claim 2 (depends on 1)

The electronic paper display device of claim 1, wherein a cell formed by the lower barrier ribs has a shape in which upper and lower portions thereof are symmetrical.

### Claim 3 (depends on 2)

The electronic paper display device of claim 2, wherein the cell formed by the lower barrier rib has a polygonal cross section or a circular cross section.

### Claim 4 (depends on 1)

The electronic paper display device of claim 1, wherein a height of the lower barrier rib is higher than that of the electronic paper display element.

### Claim 5 (depends on 1)

The electronic paper display device of claim 1, wherein a height of the upper pattern is 10 to 20 μm.

### Claim 6 (depends on 1)

The electronic paper display device of claim 1, wherein the upper pattern has a shape of a straight line or a cross.

### Claim 7 (depends on 1)

The electronic paper display device of claim 1, wherein the upper substrate or the lower substrate has a fluid inlet formed at an edge thereof, the fluid inlet connecting the cell to an external environment.

### Claim 8 (depends on 7)

The electronic paper display device of claim 7, wherein a height of the fluid inlet is 5 to 20 μm.

### Claim 9 (depends on 1)

The electronic paper display device of claim 1, wherein the upper pattern and the lower barrier rib are made of a transparent exposure material.

### Claim 10 (depends on 1)

The electronic paper display device of claim 1, wherein each of the upper substrate and the lower substrate further includes an arrangement mark for arranging the cells and bonding the cells to each other.

### Claim 11

A method of manufacturing an electronic paper display device, the method comprising:
forming lower barrier ribs configuring cells on a lower substrate using an exposure method, the lower substrate having a first exposure material layer formed thereon;
forming upper patterns on an upper substrate using the exposure method, the upper patterns capable of securing a fluid moving path and the upper substrate having a second exposure material layer formed thereon; and
mounting the electronic paper display elements on the lower substrate and bonding the upper substrate thereto.

### Claim 12 (depends on 11)

The method of claim 11, further comprising forming a fluid inlet at the upper substrate or the lower substrate, wherein the fluid inlet has fluid introduced from the outside thereinto.

### Claim 13 (depends on 11)

The method of claim 11, wherein the cell formed by the lower barrier rib has a polygonal or a circular cross section.

### Claim 14 (depends on 11)

The method of claim 11, wherein a height of the lower barrier rib is higher than that of the electronic paper display element.

### Claim 15 (depends on 11)

The method of claim 11, wherein positions of the upper pattern and the lower barrier rib are arranged using an arrangement mark formed in the upper substrate and the lower substrate.