# US 2020/0287162 A1 · Display device

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- Number: US 2020/0287162 A1
- Document ID: US20200287162A1
- Status: Published application
- Kind: A1
- Application number: 16/748,077
- Filed: 2020-01-21
- Published: 2020-09-10
- Earliest claimed: 2019-03-07
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Ho Ryun CHUNG; Myung Hwan KIM; Sang Yeol KIM; Se Joong SHIN; Chang Han LEE; Deok Hyeon JANG
- Web page: https://patentgrep.com/patent/US20200287162A1

## CPC

- H10W 90/00: Package configurations
- H10H 20/824: comprising only Group III-V materials, e.g. GaP
- H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots
- H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT]
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 77/111: {Flexible substrates}
- G02F 1/136222: {Colour filters incorporated in the active matrix substrate}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 2102/00: Constructional details relating to the organic devices covered by this subclass
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- 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
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A display device includes: a substrate; a light emitting element layer including a first light emitting element in a first display area of the substrate, and a second light emitting element in a second display area of the substrate; and a thin-film encapsulation layer formed on the light emitting element layer. The first light emitting elements may include a first electrode, an organic light emitting layer, and a second electrode. The second light emitting elements may include a first electrode, an inorganic light emitting layer, and a second electrode.

## Claims

### Claim 1

A display device comprising:
a substrate comprising a first display area and a second display area which is closer to an edge of the display device than the first display area;
a light emitting element layer comprising:
a first light emitting element in the first display area of the substrate, the first light emitting element comprising a first electrode, an organic light emitting layer and a second electrode, and
a second light emitting element disposed in the second display area of the substrate, the second light emitting element comprising a first electrode, an inorganic light emitting layer and a second electrode; and
a thin-film encapsulation layer on the light emitting element layer.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the inorganic light emitting layer of the second light emitting element comprises a light emitting unit including:
a first conductive semiconductor layer doped with a first conductive dopant;
a second conductive semiconductor layer doped with a second conductive dopant; and
an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer.

### Claim 3 (depends on 2)

The display device according to claim 2, wherein within the second light emitting element,
one among the first conductive semiconductor layer and the second conductive semiconductor layer contacts the first electrode of the second light emitting element, and
the other one among the first conductive semiconductor layer and the second conductive semiconductor layer contacts the second electrode of the second light emitting element.

### Claim 4 (depends on 2)

The display device according to claim 2, wherein the light emitting unit of the second light emitting element comprises a micro light emitting diode.

### Claim 5 (depends on 1)

The display device according to claim 1, wherein the second display area which is closer to the edge of the display device than the first display area, encloses the first display area in a plan view.

### Claim 6 (depends on 1)

The display device according to claim 1, further comprising a color filter layer comprising quantum dots, the thin-film encapsulation layer being disposed between the color filter layer and the light emitting element layer.

### Claim 7 (depends on 6)

The display device according to claim 6, wherein in the second display area, the color filter layer comprises a color conversion filter which color-converts light incident thereto, the color conversion filter corresponding to the second light emitting element.

### Claim 8 (depends on 1)

The display device according to claim 1, further comprising:
a pad portion through which an electrical signal is provided to the first display area, the pad portion including an integrated circuit chip, and
a bending area at which the display device is bendable,
wherein the bending area connects the first display area or the second display area to the pad portion.

### Claim 9 (depends on 1)

The display device according to claim 1, further comprising in the second display area, a through hole extending through the substrate and the thin-film encapsulation layer.

### Claim 10 (depends on 1)

The display device according to claim 1, further comprising:
the first display area provided in plurality to define a plurality of sub-areas, and
the second display area comprises a bending area at which the display device is bendable, the bending area connecting the plurality of sub-areas to each other.

### Claim 11 (depends on 1)

The display device according to claim 1, wherein the thin-film encapsulation layer includes a plurality of inorganic layers.

### Claim 12 (depends on 11)

The display device according to claim 11, wherein
in the first display area, the thin-film encapsulation layer includes an organic layer between the plurality of inorganic layers, and
in the second display area, the thin-film encapsulation layer excludes the organic layer.

### Claim 13 (depends on 1)

The display device according to claim 1, wherein the first light emitting element comprises an organic light emitting diode.

### Claim 14

A display device comprising:
a substrate comprising a first display area and a second display area which is closer to an outer edge of the display device than the first display area;
a first light emitting element in the first display area of the substrate, the first light emitting element including an organic light emitting layer; and
a second light emitting element in the second display area of the substrate, the second light emitting element including an inorganic light emitting layer.

### Claim 15 (depends on 14)

The display device according to claim 14, wherein the second light emitting element comprises a light emitting unit in the inorganic light emitting layer, the light emitting unit comprising:
a first conductive semiconductor layer doped with a first conductive dopant;
a second conductive semiconductor layer doped with a second conductive dopant; and
an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer.

### Claim 16 (depends on 14)

The display device according to claim 14, wherein an outer edge of the second display area corresponds to the outer edge of the display device.

### Claim 17 (depends on 14)

The display device according to claim 14, further comprising a thin-film encapsulation layer including an organic layer between a plurality of inorganic layers,
wherein
in the first display area, the first light emitting element including the organic light emitting layer is between the substrate and the organic layer of the thin-film encapsulation layer, and
in the second display area:
the thin-film encapsulation layer includes the plurality of inorganic layers and excludes the organic layer, and
the second light emitting element including the inorganic light emitting layer is between the substrate and the thin-film encapsulation layer.

### Claim 18 (depends on 14)

The display device according to claim 14, wherein
the second display area comprises a bending area at which the display device is bendable, and
the second light emitting element including the inorganic light emitting layer is disposed in the bending area.