# US 12,114,526 B2 · Display device

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- Number: US 12,114,526 B2
- Document ID: US12114526B2
- Status: Granted
- Kind: B2
- Application number: 17/507,582
- Filed: 2021-10-21
- Published: 2022-06-09
- Granted: 2024-10-08
- Earliest claimed: 2020-12-03
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Yeonjae Jeong; Wansoo Lee
- Web page: https://patentgrep.com/patent/US12114526B2

## CPC

- G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED}
- B32B 5/022: {Non-woven fabric}
- B32B 5/024: {Woven fabric}
- B32B 5/028: {Net structure, e.g. spaced apart filaments bonded at the crossing points}
- B32B 5/18: characterised by features of a layer {of} foamed material
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/281: {comprising polyimides}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/325: {comprising polycycloolefins}
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- H10K 59/221: {Static displays, e.g. displaying permanent logos}
- H10K 59/873: {Encapsulations}
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- B32B 2255/02: on fibrous or filamentary layer
- B32B 2255/102: synthetic resin or rubber layer being a foamed layer
- B32B 2262/02: Synthetic macromolecular fibres
- B32B 2262/0246: Acrylic resin fibres
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2266/0214: Materials belonging to B32B27/00
- B32B 2266/0242: Acrylic resin
- B32B 2266/025: Polyolefin
- B32B 2266/0264: Polyester
- B32B 2307/4023: on the layer surface, e.g. ink
- B32B 2307/732: Dimensional properties
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 77/111: {Flexible substrates}
- H10K 2102/311: {Flexible OLED}
- H10K 2102/351: {Thickness}
- H10W 72/07353: {changes in shapes}
- H10W 72/331: {Shapes of die-attach connectors}
- H10W 90/734: {between a chip and a stacked insulating package substrate, interposer or RDL}
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

A display device includes a display panel having a display area and a non-display area surrounding the display area, and a decorative film disposed on the display panel. The decorative film includes a porous layer disposed on the display panel and including a plurality of pores, and a decorative layer which overlaps the non-display area and is disposed in the porous layer. Accordingly, the decorative layer which is partially disposed is formed in the porous layer so that a step caused by the decorative layer is not formed or minimized to reduce the thickness of the decorative film. As a result, the design the display device can be slim, and a flexible display device with an excellent folding reliability can be provided based on the display device.

## Claims

### Claim 1

A display device, comprising:
a display panel including a display area and a non-display area adjacent to the display area; and
a decorative film disposed on the display panel,
wherein the decorative film includes:
a porous layer including a plurality of pores, a first area overlapping the non-display area, and a second area overlapping the display area; and
a decorative layer disposed in the first area of the porous layer.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein an average diameter of the plurality of pores is approximately 0.01 μm to 50 μm.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein an average porosity of the porous layer is approximately 20 volume % to 80 volume %.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein the porous layer is a mesh pattern layer, a foam layer, a woven layer, or a non-woven layer which is formed of one or more polymers selected from polyethylene terephthalate, polyimide, polyamideimide, polycarbonate, polymethyl methacrylate, and cycloolefin (co)polymer.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein the non-woven layer and the woven layer are configured by fibers having a diameter of approximately 0.01 μm to 50 μm.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein the decorative film further includes a base layer disposed on one surface of the porous layer.

### Claim 7 (depends on 6)

The display device according to claim 6, wherein the base layer includes one or more polymers selected from polyethylene terephthalate, polyimide, polyamideimide, polycarbonate, polymethyl methacrylate, and cycloolefin (co)polymer.

### Claim 8 (depends on 1)

The display device according to claim 1, wherein the decorative layer is formed by immersing a composition for forming the decorative layer in the first area of the porous layer and then curing the composition, and
the decorative layer is disposed to be filled in the plurality of pores of the porous layer.

### Claim 9 (depends on 1)

The display device according to claim 1, wherein an average diameter of the plurality of pores of the first area in the porous layer is larger than an average diameter of the plurality of pores of the second area in the porous layer.

### Claim 10 (depends on 1)

The display device according to claim 1, wherein an average porosity of the first area in the porous layer is larger than an average porosity of the second area in the porous layer.

### Claim 11 (depends on 1)

The display device according to claim 1, wherein a thickness of the porous layer is approximately 10 μm to 200 μm.

### Claim 12 (depends on 1)

The display device according to claim 1, wherein a thickness of the decorative layer is approximately 1 μm to 20 μm.

### Claim 13 (depends on 1)

The display device according to claim 1, further comprising:
an adhesive layer disposed on at least one surface of the porous layer.

### Claim 14 (depends on 13)

The display device according to claim 13, wherein a modulus of the adhesive layer is approximately 1.0×103 Pa to 1.0×107 Pa.

### Claim 15 (depends on 13)

The display device according to claim 13, wherein the adhesive layer is filled in at least some of the plurality of pores in the porous layer.

### Claim 16 (depends on 1)

The display device according to claim 1, wherein portions of the decorative layer extend into the porous layer.

### Claim 17 (depends on 1)

The display device according to claim 1, wherein an upper surface of the decorative layer contacts the porous layer, and
wherein a lowermost surface of the decorative layer is flush with a lowermost surface of the porous layer.

### Claim 18 (depends on 1)

The display device according to claim 1, further comprising:
an adhesive layer disposed on a surface of the porous layer,
wherein a portion of the decorative layer extends into a depression in the porous layer, and another portion of the decorative layer extends into a depression in the adhesive layer.

### Claim 19 (depends on 1)

The display device according to claim 1, wherein the porous layer includes a plurality of holes that extend all the way through opposite sides of the porous layer, and
wherein the decorative layer at least partially fills some of the plurality of holes in the porous layer.

### Claim 20

A display device, comprising:
a display panel including a display area and a non-display area adjacent to the display area; and
a decorative film disposed on the display panel,
wherein the decorative film includes:
a porous layer including a plurality of pores, a first area overlapping the non-display area, and a second area overlapping the display area; and
a decorative layer disposed in the first area of the porous layer, and
wherein an average diameter of the plurality of pores of the first area in the porous layer is larger than an average diameter of the plurality of pores of the second area in the porous layer, or an average porosity of the first area in the porous layer is larger than an average porosity of the second area in the porous layer.