# US 12,216,849 B2 · Display panel and display apparatus having crack detection circuit with conductive loop

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- Number: US 12,216,849 B2
- Document ID: US12216849B2
- Status: Granted
- Kind: B2
- Application number: 17/905,815
- Filed: 2021-12-23
- Published: 2024-06-27
- Granted: 2025-02-04
- Earliest claimed: 2021-12-23
- Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd.
- Inventors: Bo Zhang; Hongwei Ma; Yulong Wei; Yi Qu; Zhiwen Chu; Xinxin Wang
- Web page: https://patentgrep.com/patent/US12216849B2

## 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}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F 2203/04104: Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
- G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
- G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters}
- G09G 2300/0408: Integration of the drivers onto the display substrate
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof
- G09G 2354/00: Aspects of interface with display user
- 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)

## Abstract

A display panel is provided. The display panel comprises: a touch electrode layer at least partially in a display area of the display panel; a gate-on-array in a peripheral area of the display panel; and a crack detection circuit; wherein at least a portion of signal lines in the crack detection circuit comprises a metal line in a same layer as mesh lines of the touch electrode layer.

## Claims

### Claim 1

A display panel, comprising:
a touch electrode layer at least partially in a display area of the display panel;
a gate-on-array in a peripheral area of the display panel; and
a crack detection circuit;
wherein at least a portion of signal lines in the crack detection circuit comprises a metal line in a same layer as mesh lines of the touch electrode layer;
the crack detection circuit comprises an integrated circuit and a first conductive loop electrically connected to the integrated circuit; and
the first conductive loop comprises a first touch crack sub-loop and a first panel crack sub-loop connected to each other, at least a portion of the first touch crack sub-loop being in a same layer as the mesh lines of the touch electrode layer; at least a portion of the first panel crack sub-loop being in a same layer as a gate line of the display panel.

### Claim 2 (depends on 1)

The display panel of claim 1, further comprising a voltage supply line in a part of the peripheral area;
wherein the display panel comprises, sequentially arranged along a direction perpendicular to extension directions of the first touch crack sub-loop and the first panel crack sub-loop in the part of the peripheral area, signal lines of the gate-on-array, a portion of the first panel crack sub-loop, a portion of the voltage supply line, and a portion of the first touch crack sub-loop.

### Claim 3 (depends on 2)

The display panel of claim 2, wherein the signal lines of the gate-on-array, the portion of the first panel crack sub-loop, the portion of the voltage supply line, and the portion of the first touch crack sub-loop are in a same layer.

### Claim 4 (depends on 2)

The display panel of claim 2, wherein the portion of the voltage supply line extends along a direction substantially parallel to the extension directions of the first touch crack sub-loop and the first panel crack sub-loop in the part of the peripheral area.

### Claim 5 (depends on 1)

The display panel of claim 1, wherein the first touch crack sub-loop comprises a first touch crack detection line and a second touch crack detection line on a same side relative to the display area, the first touch crack detection line spacing apart the second touch crack detection line from the display area; and
the first touch crack detection line comprises a first-first portion and a second-first portion in different layers and connected to each other.

### Claim 6 (depends on 5)

The display panel of claim 5, wherein the second-first portion is in a same layer as a voltage supply line in the peripheral area; and
the first-first portion is in a same layer as the mesh lines of the touch electrode layer.

### Claim 7 (depends on 5)

The display panel of claim 5, comprising a row of first vias respectively extending through at least a touch insulating layer;
wherein the first-first portion is connected to the second-first portion through a first-first via in the row of first vias; and
multiple mesh lines of mesh electrodes of the touch electrode layer are connected to multiple touch signal lines respectively through multiple first vias in the row of first vias.

### Claim 8 (depends on 7)

The display panel of claim 7, wherein the first-first portion is in a same layer as the mesh lines of the mesh electrodes of the touch electrode layer; and
the second-first portion, the multiple touch signal lines, and a voltage supply line in the peripheral area are in a second signal line layer spaced apart from the first-first portion by at least the touch insulating layer.

### Claim 9 (depends on 5)

The display panel of claim 5, wherein the first touch crack detection line further comprises a third-first portion connected to the second-first portion;
the third-first portion comprises:
a first sub-layer in a same layer as a second gate metal layer of the display panel;
a second sub-layer on a side of the first sub-layer away from a base substrate, the second sub-layer in a same layer as a first signal line layer of the display panel;
a third sub-layer on a side of the second sub-layer away from the first sub-layer, the third sub-layer in a same layer as a second signal line layer of the display panel; and
a fourth sub-layer on a side of the third sub-layer away from the second sub-layer, the fourth sub-layer in a same layer as the mesh lines of the touch electrode layer.

### Claim 10 (depends on 5)

The display panel of claim 5, wherein the second touch crack detection line comprises a first-second portion and a second-second portion in different layers and connected to each other;
wherein the display panel comprises a row of first vias respectively extending through at least a touch insulating layer;
the first-second portion is connected to the second-second portion through a second-first via in the row of first vias;
mesh lines of mesh electrodes of the touch electrode layer are connected to multiple touch signal lines respectively through multiple first vias in the row of first vias;
the first-second portion is in a same layer as the mesh lines of the mesh electrodes of the touch electrode layer; and
the second-second portion and the multiple touch signal lines are in a second signal line layer spaced apart from the first-first portion by at least the touch insulating layer.

### Claim 11 (depends on 10)

The display panel of claim 10, wherein the second touch crack detection line further comprises a third-second portion connected to the second-second portion;
the third-second portion comprises:
a fifth sub-layer in a same layer as a gate line of the display panel;
a sixth sub-layer on a side of the fifth sub-layer away from a base substrate, the sixth sub-layer in a same layer as a first signal line layer of the display panel;
a seventh sub-layer on a side of the sixth sub-layer away from the fifth sub-layer, the seventh sub-layer in a same layer as a second signal line layer of the display panel; and
an eighth sub-layer on a side of the seventh sub-layer away from the sixth sub-layer, the eighth sub-layer in a same layer as the mesh lines of the touch electrode layer.

### Claim 12 (depends on 1)

The display panel of claim 1, wherein the first panel crack sub-loop comprises a first panel crack detection line and a second panel crack detection line on a same side relative to the display area, the second panel crack detection line spacing apart the first panel crack detection line from the display area; and
the first panel crack detection line comprises a first-third portion, a second-third portion, and a third-third portion, the second-third portion being in a layer different from the first-third portion and the third-third portion, the second-third portion connecting the first-third portion to the third-third portion.

### Claim 13 (depends on 12)

The display panel of claim 12, wherein the first-third portion comprises at least a sub-layer in a same layer as a gate line of the display panel or in a same layer as a second gate metal layer;
the second-third portion is in a same layer as a voltage supply line in the peripheral area; and
the third-third portion comprises at least a sub-layer in a same layer as the second gate metal layer.

### Claim 14 (depends on 12)

The display panel of claim 12, wherein the second panel crack detection line comprises a first-fourth portion, a second-fourth portion, and a third-fourth portion, the second-fourth portion being in a layer different from the first-fourth portion and the third-fourth portion, the second-fourth portion connecting the first-fourth portion to the third-fourth portion.

### Claim 15 (depends on 14)

The display panel of claim 14, wherein the first-fourth portion comprises at least a sub-layer in a same layer as a gate line of the display panel or in a same layer as a second gate metal layer;
the second-fourth portion is in a same layer as a voltage supply line in the peripheral area; and
the third-fourth portion comprises at least a sub-layer in a same layer as the gate line of the display panel.

### Claim 16 (depends on 14)

The display panel of claim 14, wherein the third-fourth portion is connected to a third-second portion of a second touch crack detection line of the first touch crack sub-loop.

### Claim 17 (depends on 1)

The display panel of claim 1, further comprising:
a second conductive loop electrically connected to the integrated circuit; and
a connecting line connecting the first conductive loop and the second conductive loop;
wherein the second conductive loop comprises a second touch crack sub-loop and a second panel crack sub-loop connected to each other, at least a portion of the second touch crack sub-loop being in a same layer as the mesh lines of the touch electrode layer; at least a portion of the second panel crack sub-loop being in a same layer as a gate line of the display panel.

### Claim 18 (depends on 1)

A display apparatus, comprising the display panel of claim 1, and a printed circuit board connected to an integrated circuit in the display panel.