# US 10,770,668 B2 · Flexible fiber substrate and flexible display device including the same

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- Number: US 10,770,668 B2
- Document ID: US10770668B2
- Status: Granted
- Kind: B2
- Application number: 16/406,648
- Filed: 2019-05-08
- Published: 2020-03-05
- Granted: 2020-09-08
- Earliest claimed: 2018-08-29
- Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Inventors: Yangkun Jing
- Web page: https://patentgrep.com/patent/US10770668B2

## CPC

- H05K 1/038: {Textiles (used as reinforcing materials for organic insulating substrates H05K1/0366)}
- H10K 77/111: {Flexible substrates}
- G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED}
- H05K 1/0393: {Flexible materials (H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups)}
- H05K 2201/026: Nanotubes or nanowires
- H05K 2201/0278: Polymeric fibers
- H05K 2201/0281: Conductive fibers
- H05K 2201/029: Woven fibrous reinforcement or textile
- H05K 2201/0323: Carbon
- H05K 2201/10128: Display
- Y02E 10/549: Organic PV cells
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A flexible fiber substrate and a flexible display device including the same are provided. The flexible fiber substrate includes: an insulating body woven from an insulating fiber and a patterned conductive member made of a conductive fiber. The conductive member and the insulating body are fixed to each other by interlacing, and the conductive member is touchable from outside of the flexible fiber substrate.

## Claims

### Claim 1

A flexible display device comprising:
a flexible fiber substrate, wherein the flexible fiber substrate comprises:
an insulating body woven from an insulating fiber and a patterned conductive member made of a conductive fiber, wherein the conductive member and the insulating body are fixed to each other by interlacing, and the conductive member is touchable from outside of the flexible fiber substrate;
a plurality of woven layers connected to each other and at least partially overlapping each other, the plurality of woven layers comprises a first outermost woven layer, a second outermost woven layer and at least one intermediate woven layer between the first outermost woven layer and the second outermost woven layer,
the conductive member comprises a first portion located in the at least one intermediate woven layer, and a portion of the insulating body located in the first outermost woven layer overlaps the first portion of the conductive member;
a pixel unit on the flexible fiber substrate, comprising a display electrode for displaying an image,
wherein the display electrode is electrically connected to the conductive member of the flexible fiber substrate, wherein the pixel unit is a pixel unit comprising an electrophoretic microcapsule, and the electrophoretic microcapsule has a sectional shape of a trapezoid, and a short base of the trapezoid is closer to the flexible fiber substrate relative to a long base of the trapezoid.

### Claim 2 (depends on 1)

The flexible display device according to claim 1, wherein the display electrode comprises at least one of a pixel electrode and a common electrode.

### Claim 3 (depends on 1)

The flexible display device according to claim 1, wherein the flexible display device further comprises an insulating layer between the display electrode and the flexible fiber substrate, a through hole is located in the insulating layer, and the display electrode is electrically connected to the conductive member of the flexible fiber substrate via the through hole in the insulating layer.

### Claim 4 (depends on 3)

The flexible display device according to claim 3, wherein the insulating layer is a planarization layer having a planar surface far away from the flexible fiber substrate.

### Claim 5 (depends on 4)

The flexible display device according to claim 4, wherein the planarization layer is a polyimide layer.

### Claim 6 (depends on 1)

The flexible display device according to claim 1, wherein the display electrode is a pixel electrode,
the flexible display device further comprises an insulating layer between the display electrode and the flexible fiber substrate, a through hole being located in the insulating layer, the display electrode being electrically connected to the conductive member of the flexible fiber substrate via the through hole in the insulating layer, and the display electrode being located between the insulating layer and the electrophoretic microcapsule.

### Claim 7 (depends on 1)

The flexible display device according to claim 1, wherein at least a portion of the conductive member is exposed from a surface of the flexible fiber substrate.

### Claim 8 (depends on 1)

The flexible display device according to claim 1, wherein the flexible fiber substrate has a first outer surface and a second outer surface which are opposite and overlap each other upon being in a substantially flat state, the first outer surface and the second outer surface are substantially located in a first plane and a second plane, respectively; the flexible fiber substrate does not exceed beyond the first plane and the second plane in a direction perpendicular to the flexible fiber substrate in the flat state, at least a portion of the conductive member is located on at least one of the first outer surface and the second outer surface of the flexible fiber substrate.

### Claim 9 (depends on 1)

The flexible display device according to claim 1, further comprising,
a plurality of woven layers connected to each other and at least partially overlapping each other, the plurality of woven layers comprises a first outermost woven layer, a second outermost woven layer and at least one intermediate woven layer between the first outermost woven layer and the second outermost woven layer;
wherein the conductive member comprises a first portion located in the at least one intermediate woven layer, and a portion of the insulating body located in the first outermost woven layer overlaps the first portion of the conductive member.

### Claim 10 (depends on 9)

The flexible display device according to claim 9, wherein the first outermost woven layer has an opening, and the first portion of the conductive member is touchable from the outside of the flexible fiber substrate through the opening.

### Claim 11 (depends on 9)

The flexible display device according to claim 9, wherein the conductive member further comprises a second portion located in the first outermost woven layer, and the second portion of the conductive member is electrically connected to the first portion.

### Claim 12 (depends on 11)

The flexible display device according to claim 11, wherein the conductive fiber comprises a polymeric material and a conductive material dispersed therein.

### Claim 13 (depends on 12)

The flexible display device according to claim 12, wherein the insulating fiber comprises the polymeric material.

### Claim 14 (depends on 12)

The flexible display device according to claim 12, wherein the polymeric material comprises polyamide.

### Claim 15 (depends on 12)

The flexible display device according to claim 12, wherein the conductive material comprises carbon nanotubes.

### Claim 16 (depends on 11)

The flexible display device according to claim 11, wherein a diameter of the insulating fiber is substantially equal to a diameter of the conductive fiber.

### Claim 17 (depends on 11)

The flexible display device according to claim 11, wherein the flexible fiber substrate is configured as a base substrate of a flexible display device, the flexible display device further comprises a display electrode on the base substrate, the conductive member is configured to electrically connect to the display electrode.