# US 11,908,854 B2 · Display device

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- Number: US 11,908,854 B2
- Document ID: US11908854B2
- Status: Granted
- Kind: B2
- Application number: 17/966,395
- Filed: 2022-10-14
- Published: 2023-02-09
- Granted: 2024-02-20
- Earliest claimed: 2018-01-31
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Dongwook Kim; Wonkyu Kwak
- Web page: https://patentgrep.com/patent/US11908854B2

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads}
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/3275: Details of drivers for data electrodes
- H10D 89/921: {characterised by the configuration of the interconnections connecting the protective arrangements, e.g. ESD buses}
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/126: Shielding, e.g. light-blocking means over the TFTs
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/40: OLEDs integrated with touch screens
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- G02F 1/136204: {Arrangements to prevent high voltage or static electricity failures}
- G06F 3/044: by capacitive means
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
- G09G 2310/0278: Details of driving circuits arranged to drive both scan and data electrodes
- G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/87: {Passivation; Containers; Encapsulations}
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- H10K 59/873: {Encapsulations}
- H10K 59/88: Dummy elements, i.e. elements having non-functional features
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- 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)
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- 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

## Abstract

A display device includes a substrate that includes a display area and a peripheral area outside the display area, a display element on the display area, a peripheral circuit on the peripheral area, the peripheral circuit including a thin film transistor, a first shielding layer on the peripheral circuit. and a second shielding layer on the first shielding layer. At least one of the first shielding layer and the second shielding layer includes a hole. One shielding layer of the first shielding layer and the second shielding layer includes the hole and overlaps the other one of the first shielding layer and the second shielding layer.

## Claims

### Claim 1

A display device, comprising:
a substrate including a display area and a peripheral area outside the display area;
a display element in the display area, the display element including a pixel electrode electrically connected to a thin film transistor, an opposite electrode of the pixel electrode, and an emission layer between the pixel electrode and the opposite electrode;
a peripheral circuit in the peripheral area;
a first shielding layer and a second shielding layer each located in the peripheral area;
an input sensor including sensing electrodes and signal lines, wherein
the sensing electrodes are located in the display area, and
the signal lines are connected to the sensing electrodes and located in the peripheral area; and
an encapsulation layer, wherein
in the peripheral area, the encapsulation layer is disposed between the first shielding layer and the signal lines, and the second shielding layer is disposed between the first shielding layer and the encapsulation layer, and
the first shielding layer has a plurality of first holes, the second shielding layer has a plurality of second holes, and the plurality of first holes and the plurality of second holes are arranged to be offset from each other in a plan view.

### Claim 2 (depends on 1)

The display device of claim 1, further comprising:
a dummy pixel overlapping the first shielding layer and the second shielding layer.

### Claim 3 (depends on 1)

The display device of claim 1, further comprising:
a connection layer electrically connecting the thin film transistor and the pixel electrode;
a first insulating layer between the thin film transistor and the connection layer; and
a second insulating layer on the first insulating layer, the second insulating between the connection layer and the pixel electrode.

### Claim 4 (depends on 3)

The display device of claim 3, wherein each of the first and second insulating layers comprises an organic insulating material.

### Claim 5 (depends on 3)

The display device of claim 3, wherein:
the first shielding layer and the connection layer are disposed on the first insulating layer.

### Claim 6 (depends on 5)

The display device of claim 5, wherein:
the second shielding layer and the pixel layer are disposed on a same layer.

### Claim 7 (depends on 1)

The display device of claim 1, further comprising:
a dam in the peripheral area, wherein an inorganic encapsulation layer of the encapsulation layer overlaps the dam.

### Claim 8 (depends on 7)

The display device of claim 7, wherein a portion of the first shielding layer and a portion of the second shielding layer are overlapped with the dam.

### Claim 9 (depends on 7)

The display device of claim 7, wherein the first shielding layer and the second shielding layer are in direct contact with each other around the dam.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the opposite electrode of the display element is electrically connected to the second shielding layer.

### Claim 11 (depends on 10)

The display device of claim 10, wherein a part of the opposite electrode of the display element and a part of the second shielding layer are in direct contact with each other above the peripheral circuit.

### Claim 12

A display device, comprising:
a substrate including a display area and a peripheral area outside the display area;
a display element in the display area, the display element including a pixel electrode electrically connected to a thin film transistor, an opposite electrode of the pixel electrode, and an emission layer between the pixel electrode and the opposite electrode;
a peripheral circuit in the peripheral area;
a first shielding layer and a second shielding layer each located in the peripheral area; and
an input sensor including sensing electrodes in the display area and signal lines in the peripheral area, wherein the signal lines are electrically connected to the sensing electrodes, wherein
the first shielding layer and a second shielding layer are interposed between the peripheral circuit and the signal lines, and
the first shielding layer has a plurality of first holes, the second shielding layer has a plurality of second holes, and a center of each of the plurality of first holes and a center of each of the plurality of second holes are offset from each other in a plan view.

### Claim 13 (depends on 12)

The display device of claim 12, further comprising:
a first insulating layer between the peripheral circuit and the first shielding layer; and
a second insulating layer between the first shielding layer and the second shielding layer.

### Claim 14 (depends on 13)

The display device of claim 13, wherein:
the first insulating layer and the second insulating layer each comprises an organic insulating material, and
the first insulating layer has a first valley hole in the peripheral area and the second insulating layer has a second valley hole in the peripheral area overlapping the first valley hole.

### Claim 15 (depends on 14)

The display device of claim 14, wherein:
a part of the first shielding layer is in direct contact with an upper surface of an inorganic insulating layer, which is disposed under the first insulating layer, via the first valley hole, and
a part of the second shielding layer is in direct contact with an upper surface of the part of the first shielding layer via the second valley hole.

### Claim 16 (depends on 12)

The display device of claim 12, further comprising an encapsulation layer, wherein:
in the display area, the encapsulation layer is between the opposite electrode of the display element and the sensing electrodes, and
in the peripheral area, the encapsulation layer is between the second shielding layer and the signal lines.

### Claim 17 (depends on 12)

The display device of claim 12, further comprising a dam in the peripheral area, wherein the first shielding layer and the second shielding layer are in direct contact with each other around the dam.

### Claim 18 (depends on 12)

The display device of claim 12, wherein the opposite electrode of the display element is electrically connected to the second shielding layer.

### Claim 19 (depends on 18)

The display device of claim 18, wherein a part of the opposite electrode of the display element and a part of the second shielding layer are in direct contact with each.

### Claim 20 (depends on 19)

The display device of claim 19, further comprising a dummy pixel being between the display element and a contact region of the part of the second shielding layer and the part of the opposite electrode.