# US 11,442,584 B2 · Window for display device, method for fabricating the same and display device including the same

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- Number: US 11,442,584 B2
- Document ID: US11442584B2
- Status: Granted
- Kind: B2
- Application number: 17/137,715
- Filed: 2020-12-30
- Published: 2021-04-22
- Granted: 2022-09-13
- Earliest claimed: 2017-11-08
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hyunseung Seo; Jonghwan Cho
- Web page: https://patentgrep.com/patent/US11442584B2

## CPC

- B32B 27/08: of synthetic resin
- B29D 11/00788: {Producing optical films}
- B32B 27/281: {comprising polyimides}
- B32B 27/286: {comprising polysulphones; polysulfides}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- G02B 1/10: Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence)
- G02B 1/115: Multilayers
- G02B 1/116: including electrically conducting layers
- G02B 1/14: Protective coatings, e.g. hard coatings
- G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels}
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F 3/044: by capacitive means
- H04M 1/0266: {for a display module assembly}
- H05K 5/03: Covers
- B05D 7/546: {each layer being cured, at least partially, separately}
- B29D 11/0073: {Optical laminates}
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- G02F 1/133311: {Environmental protection, e.g. against dust or humidity}
- G02F 1/133331: {Cover glasses}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/133388: {with constructional differences between the display region and the peripheral region}
- G02F 1/133394: {Piezoelectric elements associated with the cells}
- G02F 2201/503: Arrangements improving the resistance to shock
- G02F 2201/54: Arrangements for reducing warping-twist
- G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F 2203/04105: Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A window for a display device includes: a base layer; a first hard coating layer on the base layer; and a second hard coating layer on the first hard coating layer and having a thickness less than a thickness of the first hard coating layer, where the first hard coating layer is between the base layer and the second hard coating layer.

## Claims

### Claim 1

A window for a display device comprising:
a base layer;
a first coating layer on the base layer; and
a second coating layer on the first coating layer and having a thickness less than a thickness of the first coating layer,
wherein at least one of the base layer, the first coating layer and the second coating layer include an ultraviolet blocking element,
wherein the first coating layer comprises acryl and epoxy, and a ratio between the acryl and the epoxy of the first coating layer is 7:3.

### Claim 2 (depends on 1)

The window of claim 1, wherein the ultraviolet blocking element is selectively included only in one of the first and the second coating layers.

### Claim 3 (depends on 1)

The window of claim 1, wherein the critical light transmittance of the one layer is about 90%.

### Claim 4 (depends on 1)

The window of claim 1, wherein the content of the ultraviolet blocking element of the base layer is in a range of about 3 wt % or less with respect to the total weight of the base layer.

### Claim 5 (depends on 1)

The window of claim 1, wherein the content of the ultraviolet blocking element of the first coating layer is in a range of about 3 wt % or less with respect to the total weight of the first coating layer.

### Claim 6 (depends on 1)

The window of claim 1, wherein the content of the ultraviolet blocking element of the second coating layer is in a range of about 3 wt % or less with respect to the total weight of the second coating layer.

### Claim 7 (depends on 1)

The window of claim 1, wherein the second coating layer has a thickness which is about 10% of the thickness of the first coating layer.

### Claim 8 (depends on 1)

The window of claim 1, wherein the first coating layer has a thickness in a range from about 5% to about 10% of a thickness of the base layer.

### Claim 9 (depends on 1)

The window of claim 1, further comprising at least one of:
a first auxiliary layer on a lower surface of the base layer; and
a second auxiliary layer between the base layer and the first coating layer.

### Claim 10 (depends on 9)

The window of claim 9, wherein at least one of the first auxiliary layer and the second auxiliary layer comprises at least one of polyimide, polycarbonate, polyethersulfone, polyethylene naphthalate, polyphenylene sulfide, opaque liquid crystal polymer and polymethylmethacrylate.

### Claim 11 (depends on 1)

The window of claim 1, wherein the first coating layer comprises an organic material and an inorganic material.

### Claim 12 (depends on 11)

The window of claim 11, wherein the organic material of the first coating layer comprises acryl and epoxy.

### Claim 13 (depends on 1)

The window of claim 1, wherein the second coating layer comprises acrylic oligomer.

### Claim 14 (depends on 13)

The window of claim 13, wherein a surface of the second coating layer is hydrophobic.

### Claim 15 (depends on 14)

The window of claim 14, wherein the surface of the second coating layer has a water contact angle of 105 degrees or more.

### Claim 16 (depends on 1)

The window of claim 1, wherein at least one of the base layer, the first coating layer and the second coating layer comprises fluorine.

### Claim 17 (depends on 1)

The window of claim 1, wherein the second coating layer is exposed to an outside environment with no other layer being disposed on the second coating layer.

### Claim 18 (depends on 1)

The window of claim 1, wherein the base layer comprises at least one of polycarbonate, a low birefringence resin and poly methyl methacrylate.

### Claim 19 (depends on 1)

The window of claim 1, wherein the first coating layer has a multilayer structure.

### Claim 20 (depends on 1)

The window of claim 1, wherein the base layer comprises a soft layer and a hard layer, the hard layer having a hardness greater than a hardness of the soft layer.

### Claim 21 (depends on 20)

The window of claim 20, wherein the soft layer and the hard layer are alternately arranged with each other.

### Claim 22 (depends on 1)

The window of claim 1, wherein the ultraviolet blocking element included in one layer of the base layer, the first coating layer and the second coating layer has an amount determined not to lower a critical light transmittance of the one layer.

### Claim 23

A display device comprising:
a display panel; and
a window on the display panel,
wherein the window comprises:
a base layer on the display panel;
a first coating layer on the base layer; and
a second coating layer on the first coating layer and having a thickness less than a thickness of the first coating layer,
wherein at least one of the base layer, the first coating layer and the second coating layer includes an ultraviolet blocking element,
wherein the first coating layer comprises acryl and epoxy, and a ratio between the acryl and the epoxy of the first coating layer is 7:3.

### Claim 24 (depends on 23)

The display device of claim 23, wherein the ultraviolet blocking element is selectively included only in one of the first and the second coating layers.

### Claim 25 (depends on 23)

The display device of claim 23, wherein the content of the ultraviolet blocking element of the base layer is in a range of about 3 wt % or less with respect to the total weight of the base layer.

### Claim 26 (depends on 23)

The display device of claim 23, wherein the content of the ultraviolet blocking element of the first coating layer is in a range of about 3 wt % or less with respect to the total weight of the first coating layer.

### Claim 27 (depends on 23)

The display device of claim 23, wherein the content of the ultraviolet blocking element of the second coating layer is in a range of about 3 wt % or less with respect to the total weight of the second coating layer.

### Claim 28 (depends on 23)

The display device of claim 23, further comprising:
a frame which supports the window; and
a panel support portion between the window and a base portion of the frame.