# US 10,319,308 B2 · Display device

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- Number: US 10,319,308 B2
- Document ID: US10319308B2
- Status: Granted
- Kind: B2
- Application number: 15/782,658
- Filed: 2017-10-12
- Published: 2018-06-14
- Granted: 2019-06-11
- Earliest claimed: 2016-12-12
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hae Yeon Lee; Won Kyu Kwak; Joong Soo Moon; Chang Kyu Jin
- Web page: https://patentgrep.com/patent/US10319308B2

## CPC

- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer}
- G09G 3/3225: using an active matrix
- G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
- H10K 77/111: {Flexible substrates}
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2380/02: Flexible displays
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- 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
- 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)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A display device includes a substrate including a bent area, and a flat area including a plurality of pixels, a plurality of island-shaped inorganic insulating patterns arranged on the substrate in the bent area to be separate from each other, an organic insulating layer including a concavo-convex surface covering the inorganic insulating patterns in the bent area, and wiring lines arranged on the organic insulating layer and overlapping the inorganic insulating patterns.

## Claims

### Claim 1

A display device comprising:
a substrate including a bent area, and a flat area including a plurality of pixels;
a plurality of island-shaped inorganic insulating patterns arranged on the substrate in the bent area to be separate from each other;
an organic insulating layer including a concavo-convex surface covering the inorganic insulating patterns in the bent area; and
wiring lines arranged on the organic insulating layer and overlapping the inorganic insulating patterns such that the concavo-convex surface of the organic insulating layer is between the inorganic insulating patterns and the wiring lines.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the wiring lines have a concavo-convex part over the concavo-convex surface of the organic insulating layer.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the inorganic insulating patterns comprise at least two sequentially stacked inorganic insulating layers.

### Claim 4 (depends on 3)

The display device of claim 3,
wherein each of the plurality of pixels comprises a transistor on the substrate and an emission element connected to the transistor,
wherein the transistor comprises:
a buffer layer on the substrate;
an active pattern on the buffer layer;
a gate electrode on a gate insulating layer on the active pattern;
an interlayer insulating layer on the gate electrode;
an insulating layer on the interlayer insulating layer; and
a source electrode and a drain electrode on the insulating layer, and
wherein the buffer layer, the gate insulating layer, and the interlayer insulating layer comprise openings that expose the substrate in the bent area.

### Claim 5 (depends on 4)

The display device of claim 4, wherein the inorganic insulating patterns are provided in the openings and comprise:
a first inorganic insulating layer on the substrate; and
a second inorganic insulating layer on the first inorganic insulating layer.

### Claim 6 (depends on 5)

The display device of claim 5,
wherein the first inorganic insulating layer comprises a same material as the buffer layer, and
wherein the second inorganic insulating layer comprises a same material as the gate insulating layer.

### Claim 7 (depends on 6)

The display device of claim 6, wherein the inorganic insulating patterns further comprise a third inorganic insulating layer on the second inorganic insulating layer.

### Claim 8 (depends on 7)

The display device of claim 7, wherein the third inorganic insulating layer comprises a same material as the interlayer insulating layer.

### Claim 9 (depends on 8)

The display device of claim 8, wherein the organic insulating layer extends from the insulating layer and fills the openings.

### Claim 10 (depends on 8)

The display device of claim 8, wherein the insulating layer comprises an inorganic material and exposes the substrate to correspond to the openings.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the organic insulating layer is a fill insulating layer including an organic material which fills the openings.

### Claim 12 (depends on 10)

The display device of claim 10, wherein the inorganic insulating patterns further comprise a fourth inorganic insulating layer on the third inorganic insulating layer.

### Claim 13 (depends on 12)

The display device of claim 12, wherein the fourth inorganic insulating layer comprises a same material as the insulating layer.

### Claim 14 (depends on 3)

The display device of claim 3, wherein, in a direction vertical to a direction in which the wiring lines extend, a width of the wiring lines is not more than a width of the inorganic insulating patterns.

### Claim 15 (depends on 14)

The display device of claim 14, wherein, in the direction in which the wiring lines extend, a first distance between adjacent inorganic insulating patterns of the inorganic insulating patterns is not more than 50% of a sum of the width of the wiring lines in the direction vertical to the direction in which the wiring lines extend and the width of the inorganic insulating patterns.

### Claim 16 (depends on 15)

The display device of claim 15, wherein, in the direction vertical to the direction in which the wiring lines extend, a second distance between the adjacent inorganic insulating patterns is substantially equal to the first distance.

### Claim 17 (depends on 15)

The display device of claim 15, wherein a thickness of the organic insulating layer is not more than 1.5 times a thickness of the inorganic insulating patterns.

### Claim 18 (depends on 17)

The display device of claim 17, wherein the thickness of the inorganic insulating patterns is not less than 10% of the width of the wiring lines and the width of the inorganic insulating patterns.

### Claim 19 (depends on 17)

The display device of claim 17, wherein the thickness of the inorganic insulating patterns is not less than 8,000 Å.

### Claim 20 (depends on 2)

The display device of claim 2, wherein, in a direction in which the wiring lines extend, each of the inorganic insulating patterns overlaps one of the wiring lines.

### Claim 21 (depends on 20)

The display device of claim 20, wherein, in a direction vertical to the direction in which the wiring lines extend, each of the inorganic insulating patterns overlaps one of the wiring lines.

### Claim 22 (depends on 20)

The display device of claim 20, wherein, in a direction vertical to the direction in which the wiring lines extend, each of the inorganic insulating patterns overlaps a plurality of the wiring lines.

### Claim 23 (depends on 20)

The display device of claim 20, wherein the inorganic insulating patterns comprise:
a first inorganic insulating pattern on the substrate; and
at least one second inorganic insulating pattern on the first inorganic insulating pattern.

### Claim 24 (depends on 23)

The display device of claim 23,
wherein the at least one second inorganic insulating pattern comprises at least two second inorganic insulating patterns, and
wherein, in the direction in which the wiring lines extend, the at least two second inorganic insulating patterns are separate from each other.

### Claim 25 (depends on 23)

The display device of claim 23, wherein the at least one second inorganic insulating pattern comprises at least two inorganic insulating layers.

### Claim 26

A display device comprising:
a substrate including a bent area and a flat area;
a buffer layer on the substrate;
an active pattern on the buffer layer in the flat area;
a gate insulating layer on the active pattern;
a gate electrode on the gate insulating layer in the flat area;
an interlayer insulating layer on the gate electrode;
a first insulating layer on the interlayer insulating layer;
a source electrode and a drain electrode arranged on the first insulating layer to be separate from each other and connected to the active pattern in the flat area;
a second insulating layer on the drain electrode and including an organic material;
an emission element on the second insulating layer and connected to the drain electrode in the flat area;
an opening through areas of the buffer layer, the gate insulating layer, and the interlayer insulating layer, which correspond to the bent area;
a plurality of island-shaped inorganic insulating patterns arranged in the opening to be separate from each other;
an organic insulating layer covering the inorganic insulating patterns; and
wiring lines arranged on the organic insulating layer,
wherein the organic insulating layer comprises a concavo-convex surface between the inorganic insulating patterns and the wiring lines, and
wherein the wiring lines comprise a concavo-convex part over the concavo-convex surface of the organic insulating layer.

### Claim 27 (depends on 26)

The display device of claim 26, wherein the inorganic insulating patterns comprise at least two sequentially stacked inorganic insulating layers.

### Claim 28 (depends on 27)

The display device of claim 27, wherein the inorganic insulating patterns comprise:
a first inorganic insulating layer on the substrate; and
a second inorganic insulating layer on the first inorganic insulating layer.

### Claim 29 (depends on 28)

The display device of claim 28,
wherein the first inorganic insulating layer comprises a same material as the buffer layer, and
wherein the second inorganic insulating layer comprises a same material as the gate insulating layer.

### Claim 30 (depends on 29)

The display device of claim 29,
wherein the inorganic insulating patterns further comprise a third inorganic insulating layer on the second inorganic insulating layer, and
wherein the third inorganic insulating layer comprises a same material as the interlayer insulating layer.

### Claim 31 (depends on 30)

The display device of claim 30, wherein the organic insulating layer extends from the first insulating layer.

### Claim 32 (depends on 30)

The display device of claim 30, wherein the first insulating layer comprises an inorganic material and exposes the substrate to correspond to the opening.

### Claim 33 (depends on 32)

The display device of claim 32, wherein the organic insulating layer is a fill insulating layer including an organic material which fills the opening.

### Claim 34 (depends on 32)

The display device of claim 32,
wherein the inorganic insulating patterns further comprise a fourth inorganic insulating layer provided on the third inorganic insulating layer, and
wherein the fourth inorganic insulating layer comprises a same material as the first insulating layer.

### Claim 35 (depends on 27)

The display device of claim 27, wherein, in a direction vertical to a direction in which the wiring lines extend, a width of the wiring lines is not more than a width of the inorganic insulating patterns.

### Claim 36 (depends on 35)

The display device of claim 35, wherein, in the direction in which the wiring lines extend, a first distance between adjacent inorganic insulating patterns of the inorganic insulating patterns is not more than 50% of a sum of the width of the wiring lines in the direction vertical to the direction in which the wiring lines extend and the width of the inorganic insulating patterns.

### Claim 37 (depends on 36)

The display device of claim 36, wherein, in the direction vertical to the direction in which the wiring lines extend, a second distance between the adjacent inorganic insulating patterns is substantially equal to the first distance.

### Claim 38 (depends on 36)

The display device of claim 36, wherein a thickness of the organic insulating layer is not more than 1.5 times a thickness of the inorganic insulating patterns.

### Claim 39 (depends on 38)

The display device of claim 38, wherein the thickness of the inorganic insulating patterns is not less than 10% of the width of the wiring lines and the width of the inorganic insulating patterns.

### Claim 40 (depends on 38)

The display device of claim 38, wherein the thickness of the inorganic insulating patterns is not less than 8,000 Å.

### Claim 41 (depends on 26)

The display device of claim 26, wherein, in a direction in which the wiring lines extend, each of the inorganic insulating patterns overlaps one of the wiring lines.

### Claim 42 (depends on 41)

The display device of claim 41, wherein, in a direction vertical to the direction in which the wiring lines extend, each of the inorganic insulating patterns overlaps one of the wiring lines.

### Claim 43 (depends on 41)

The display device of claim 41, wherein, in a direction vertical to the direction in which the wiring lines extend, each of the inorganic insulating patterns overlaps a plurality of the wiring lines.

### Claim 44 (depends on 41)

The display device of claim 41, wherein the inorganic insulating patterns comprise:
a first inorganic insulating pattern on the substrate; and
at least one second inorganic insulating pattern on the first inorganic insulating pattern.

### Claim 45 (depends on 44)

The display device of claim 44,
wherein the at least one second inorganic insulating pattern comprises at least two second inorganic insulating patterns, and
wherein, in the direction in which the wiring lines extend, the at least two second inorganic insulating patterns are separate from each other.

### Claim 46 (depends on 44)

The display device of claim 44, wherein the at least one second inorganic insulating pattern comprises at least two inorganic insulating layers.