# US 11,452,245 B2 · Display device

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

- Number: US 11,452,245 B2
- Document ID: US11452245B2
- Status: Granted
- Kind: B2
- Application number: 16/716,123
- Filed: 2019-12-16
- Published: 2020-06-25
- Granted: 2022-09-20
- Earliest claimed: 2018-12-19
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: JiHun Song
- Web page: https://patentgrep.com/patent/US11452245B2

## CPC

- H05K 7/20963: {Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20972 takes precedence)}
- G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters}
- H05K 5/03: Covers
- G09G 2300/0439: Pixel structures
- G09G 2380/02: Flexible displays
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- 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

A flexible, rollable display system includes a display and one or more cover components coupled thereto. The cover components include openings that, when the display is wound around a roller, reduce induced stresses and the likelihood of the display cracking. The roller may include a flat portion to accommodate a printed circuit board or other electronic components less flexible than the display. The cover component(s) may be formed of heat radiating material(s) to improve performance of the system.

## Claims

### Claim 1

A display device, comprising:
a display panel including a display area having a plurality of pixels and a non-display area;
a first cover coupled to the display panel, the first cover including a plurality of first openings through the first cover;
a second cover coupled to the first cover or the display panel, the second cover including a plurality of second openings through the second cover, the second cover at least partially overlapping the non-display area of the display panel and the first cover; and
a roller coupled to the second cover.

### Claim 2 (depends on 1)

The display device according to claim 1, further comprising:
one or more flexible films electrically connected to the display panel; and
one or more printed circuit boards electrically connected to the one or more flexible films;
wherein the one or more printed circuit boards are fixed to the second cover.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein:
the first cover includes a first support area and a first malleable area adjacent to the first support area, wherein the display panel is coupled to the first malleable area; and
the second cover at least partially overlaps the first malleable area of the first cover on a surface of the first cover opposite to the display panel.

### Claim 4 (depends on 1)

The display device according to claim 1, further comprising:
an adhesive member disposed on at least one of the first cover and the second cover, the adhesive member at least partially filling at least one of the plurality of first openings and the plurality of second openings.

### Claim 5

A display device, comprising:
a display panel including a plurality of pixels;
a first cover coupled to the display panel;
a second cover coupled to the first cover or the display panel;
a roller coupled to the second cover;
a first adhesive member bonding the display panel to the first cover; and
a second adhesive member bonding the first cover to the second cover.

### Claim 6 (depends on 5)

The display device according to claim 5, further comprising:
one or more flexible films electrically connected to the display panel in a bonding area of the display panel;
wherein the first adhesive member spans an entire area between the display panel, other than the bonding area of the display panel, and the first cover.

### Claim 7 (depends on 6)

The display device according to claim 6, wherein the second adhesive member is located between the first cover and the second cover and does not overlap the bonding area.

### Claim 8

A display device, comprising:
a display panel including a plurality of pixels;
a first cover coupled to the display panel;
a second cover coupled to the first cover or the display panel; and
a roller coupled to the second cover,
the first cover includes a first support area and a first malleable area adjacent to the first support area, wherein the display panel is coupled to the first malleable area of the first cover;
the display panel includes a display area and a non-display area outside of the display area, and
the second cover at least partially overlaps the non-display area of the display panel on a surface of the display panel opposite to the first cover.

### Claim 9 (depends on 8)

The display device according to claim 8, wherein:
the non-display area includes a bonding area and one or more flexible films are bonded to the bonding area, and
the second cover overlaps the bonding area.

### Claim 10 (depends on 9)

The display device according to claim 9, further comprising:
a first adhesive member that attaches the display panel to the first cover;
wherein the first adhesive member and the first cover are coupled to a portion of the display panel outside the bonding area of the non-display area of the display panel.

### Claim 11 (depends on 9)

The display device according to claim 9, further comprising:
a second adhesive member that attaches the display panel to the second cover;
wherein the second adhesive member is an adhesive layer that includes metal or ceramic particles.

### Claim 12 (depends on 9)

The display device according to claim 9, wherein:
the non-display area further includes a driving circuit area adjacent to the bonding area, wherein the driving circuit area includes a driving circuit; and
the second cover overlaps the driving circuit area.

### Claim 13 (depends on 8)

The display device according to claim 8, wherein:
the second cover includes a second support area fixed to the roller and a second malleable area adjacent to the second support area; and
the second malleable area includes the plurality of second openings.

### Claim 14

A display device, comprising:
a display panel configured to display images;
one or more flexible films electrically connected to the display panel;
a first cover attached to a rear surface of the display panel;
a second cover attached to a rear surface of the first cover or to a front surface of the display panel, wherein the second cover overlaps a location where the display panel and the one or more flexible films are connected; and
a roller configured to wind and unwind the display panel, the first cover, and the second cover about the roller.

### Claim 15 (depends on 14)

The display device according to claim 14, wherein:
the display panel includes a display area and a non-display area at the outside of the display area;
the non-display area includes a bonding area;
the flexible film is bonded to the non-display area of the display panel; and
the second cover overlaps the bonding area.

### Claim 16 (depends on 15)

The display device according to claim 15, further comprising:
a first adhesive member that attaches the display panel to the first cover; and
a second adhesive member that attaches the display panel to the second cover;
wherein the second cover is coupled to a surface of the display panel opposite to the first cover.

### Claim 17 (depends on 16)

The display device according to claim 16, wherein the second adhesive member is an adhesive layer that includes heat radiating particles.

### Claim 18 (depends on 14)

The display device according to claim 14, wherein the second cover is formed of a metal material selected from a group of metal materials consisting of: aluminum, copper, nickel, an alloy including aluminum, an alloy including copper, an alloy including nickel, and an alloy including silver.

### Claim 19

A display device, comprising:
a display panel configured to display images;
one or more flexible films electrically connected to the display panel;
a first cover attached to a rear surface of the display panel;
a second cover attached to a rear surface of the first cover or to a front surface of the display panel, wherein the second cover overlaps a location where the display panel and the flexible film are connected;
a roller configured to wind and unwind the display panel, the first cover, and the second cover;
a first adhesive member that attaches the display panel to the first cover; and
a second adhesive member that attaches the second cover to the first cover,
wherein the second cover is coupled to a surface of the first cover opposite to the display panel,
the display panel includes a display area and a non-display area outside of the display area,
the non-display area includes a bonding area,
the flexible film is bonded to the non-display area of the display panel, and
the second cover overlaps the bonding area.

### Claim 20 (depends on 19)

The display device according to claim 19, wherein the second adhesive member does not contact the bonding area.

### Claim 21

A rollable display device, comprising:
a rollable display panel;
a first cover coupled to a rear surface of the rollable display panel, wherein the first cover includes a malleable portion, the malleable portion of the first cover including a first plurality of openings through the first cover;
a printed circuit board coupled to the rollable display panel;
a second cover coupled to the rollable display panel or to the first cover wherein the second cover overlaps the printed circuit board; and
an adhesive member coupled to at least one of the first cover and the second cover.

### Claim 22 (depends on 21)

The rollable display device of claim 21 wherein the second cover overlaps the printed circuit board along an axis extending from a front end of the rollable display device to a rear end of the rollable display device.

### Claim 23 (depends on 21)

The rollable display device of claim 21 wherein the second cover includes a first malleable portion of the second cover including a second plurality of openings, a second malleable portion of the second cover including a third plurality of openings, and a support portion located between the first malleable portion of the second cover and the second malleable portion of the second cover, wherein the printed circuit board is attached to the support portion of the second cover.

### Claim 24 (depends on 23)

The rollable display device of claim 23 wherein the malleable portion of the first cover overlaps the first malleable portion of the second cover.

### Claim 25 (depends on 21)

The rollable display device of claim 21 wherein the rollable display panel is attached to the malleable portion of the first cover.

### Claim 26 (depends on 21)

The rollable display device of claim 21 wherein the first cover is configured to structurally support the rollable display panel and the second cover is configured to structurally support the rollable display panel and the printed circuit board.

### Claim 27 (depends on 21)

The rollable display device of claim 21 wherein the second cover is a heat-radiating material.

### Claim 28 (depends on 27)

The rollable display device of claim 27 wherein the heat-radiating material includes a material selected from the group consisting of: aluminum, copper, nickel, and silver.

### Claim 29 (depends on 21)

The rollable display device of claim 21 wherein the rollable display panel includes a bonding portion of the rollable display panel where a flexible film is bonded to the rollable display panel, and the second cover is coupled to a front surface of the bonding portion of the rollable display panel.

### Claim 30 (depends on 21)

The rollable display device of claim 21 wherein the second cover is coupled to the rollable display panel by an adhesive including particles of a heat radiating material.