# US 2019/0173050 A1 · Display device and method of manufacturing the same

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- Number: US 2019/0173050 A1
- Document ID: US20190173050A1
- Status: Published application
- Kind: A1
- Application number: 16/162,316
- Filed: 2018-10-16
- Published: 2019-06-06
- Earliest claimed: 2017-12-04
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Sung Woo EO
- Web page: https://patentgrep.com/patent/US20190173050A1

## CPC

- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H05K 5/03: Covers
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light}
- G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00)
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 59/40: OLEDs integrated with touch screens
- H10K 71/40: Thermal treatment, e.g. annealing in the presence of a solvent vapour
- H10K 2102/311: {Flexible OLED}
- H10K 2102/351: {Thickness}
- H10K 2102/361: {Temperature}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A display device includes a display panel having a display region and a non-display region that is arranged outside the display region, a cover window arranged on the display panel, and a frit coating layer formed on a side surface of the cover window.

## Claims

### Claim 1

A display device comprising:
a display panel including a display region and a non-display region that is arranged outside the display region;
a cover window arranged on the display panel; and
a frit coating layer formed on a side surface of the cover window.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the cover window includes a flat portion and a curved portion that is arranged at both sides of the flat portion, the side surface of the cover window includes a left side surface and a right side surface formed at ends of the curved portion, and the frit coating layer is formed on the left side surface and the right side surface.

### Claim 3 (depends on 2)

The display device of claim 2, further comprising an upper side surface and a lower side surface configured to connect upper ends and lower ends of the left side surface and the right side surface,
wherein the frit coating layer is formed on the left side surface, the right side surface, the upper side surface, and the lower side surface.

### Claim 4 (depends on 2)

The display device of claim 2, wherein the display panel includes a first substrate, an encapsulation layer formed on the first substrate, and an organic light-emitting diode arranged between the first substrate and the encapsulation layer.

### Claim 5 (depends on 1)

The display device of claim 1, wherein a thickness of the frit coating layer ranges from 5 μm to 15 μm.

### Claim 6 (depends on 1)

The display device of claim 1, wherein the side surface includes a polished surface chamfered in an oblique direction.

### Claim 7 (depends on 1)

The display device of claim 1, further comprising an input sensing unit arranged between the display panel and the cover window.

### Claim 8 (depends on 1)

The display device of claim 1, further comprising a polarizing layer arranged between the display panel and the cover window.

### Claim 9 (depends on 1)

The display device of claim 1, further comprising a printing layer arranged between the display panel and the cover window.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the frit coating layer is black.

### Claim 11 (depends on 1)

The display device of claim 1, wherein the cover window is flat.

### Claim 12 (depends on 11)

The display device of claim 11, wherein the display panel includes a first substrate, a second substrate opposite to the first substrate, and an organic light-emitting diode arranged between the first substrate and the second substrate.

### Claim 13 (depends on 1)

The display device of claim 1, wherein the cover window and the frit coating layer are made of glass.

### Claim 14 (depends on 13)

The display device of claim 13, wherein the cover window and the frit coating layer have the same coefficient of thermal expansion.

### Claim 15

A method of manufacturing a display device, the method comprising:
applying a frit onto a side surface of a cover window;
pressing the cover window with an upper jig and a lower jig and forming a curved portion; and
applying heat to the frit and forming a frit coating layer.

### Claim 16 (depends on 15)

The method of claim 15, wherein the pressing of the cover window with the upper jig and the lower jig and the applying of the heat to the frit are performed simultaneously.

### Claim 17 (depends on 15)

The method of claim 15, wherein a temperature of the heat applied to the frit ranges from 400° C. to 900° C.

### Claim 18 (depends on 15)

The method of claim 15, wherein the upper jig and the lower jig include graphite.

### Claim 19 (depends on 15)

The method of claim 15, wherein the cover window includes a flat portion and a curved portion that is arranged at both sides of the flat portion, the side surface of the cover window includes a left side surface and a right side surface formed at ends of the curved portion, and the applying of the frit onto the side surface of the cover window includes applying a frit onto the left side surface and the right side surface.

### Claim 20 (depends on 15)

The method of claim 15, wherein the applying of the frit onto the side surface of the cover window includes printing the frit in a solution state onto the side surface of the cover window.