Display apparatus with crack detection electrodes disposed in different layers

Patent metadata

Field	Value
Publication number	US-12225807-B2
Application number	US-202318380196-A
Country	US
Kind code	B2
Filing date	Oct 16, 2023
Priority date	Feb 19, 2021
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A display apparatus includes a first pad at one side of a substrate; a first semiconductor layer on the substrate; a first crack detection electrode interposed between the substrate and the first semiconductor layer, and including a first end portion at the one side and a second end portion at another side; a second crack detection electrode disposed on the first semiconductor layer, and including a first end portion located at the one side and a second end portion connected to the second end portion of the first crack detection electrode; and a first auxiliary electrode disposed on the second conductive layer, and including a first end portion connected to the second end portion of the first crack detection electrode and a second end portion electrically connected to the first pad.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate having a display area and a peripheral area outside the display area;
a plurality of pads disposed at one side of the peripheral area; and
a first, a second, and a third conductive layers including a first, a second, and a third crack detection electrodes, respectively,
wherein the first, the second, and the third crack detection electrodes extends along one edge of the substrate in the peripheral area, and
wherein a first end portion of the first crack detection electrode, a first end portion of the second crack detection electrode, and a first end portion of the third crack detection electrode are electrically connected with each other at another side of the peripheral area; wherein the first crack detection electrode includes a plurality of first zigzag patterns that are connected to each other in series, and the second crack detection electrode includes a plurality of second zigzag patterns that are connected to each other in series; wherein the first crack detection electrode and the second crack detection electrode at least partially overlap each other.

2. The display apparatus of claim 1 , wherein the plurality of pads includes a first pad electrically connected to a second end portion of the third crack detection electrode.

3. The display apparatus of claim 1 , wherein a second end portion of the first crack detection electrode and a second end portion of the second crack detection electrode are electrically connected with each other.

4. The display apparatus of claim 1 , wherein the plurality of pads includes:
a second pad electrically connected to a second end portion of the first crack detection electrode; and
a third pad electrically connected to a second end portion of the second crack detection electrode.

5. The display apparatus of claim 1 , wherein the first crack detection electrode and the second crack detection electrode substantially overlap each other.

6. A display apparatus comprising:
a substrate having a display area and a peripheral area outside the display area;
a plurality of pads disposed at one side of the peripheral area; and
a first, a second, and a third conductive layers including a first, a second, and a third crack detection electrodes, respectively,
wherein the first, the second, and the third crack detection electrodes extends along one edge of the substrate in the peripheral area, and
wherein the plurality of pads includes a first pad electrically connected to a first end portion of the first crack detection electrode, a first end portion of the second crack detection electrode, and a first end portion of the third crack detection electrode; wherein at least one of the first, second, or third crack detection electrodes includes a plurality of zigzag patterns that are connected to each other in series; wherein the first, the second, and the third crack detection electrodes substantially overlap each other at least in a section extending along the one edge of the substrate; an auxiliary electrode extending along the one edge in the peripheral area and electrically connecting the first end portion of the first crack detection electrode, the firstend portion of the second crack detection electrode, and the first end portion of the third crack detection electrode to the first pad.

7. The display apparatus of claim 6 , wherein the plurality of pads includes a second pad electrically connected to a second end portion of the first crack detection electrode, a second end portion of the second crack detection electrode, and a second end portion of the third crack detection electrode.

8. The display apparatus of claim 6 , wherein the plurality of pads includes:
a second pad electrically connected to a second end portion of the first crack detection electrode;
a third pad electrically connected to a second end portion of the second crack detection electrode; and
a fourth pad electrically connected to a second end portion of the third crack detection electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Minjeong
• Park Hyungjun
• An Junyong
• Um Nuree
• Kwak Wonkyu

Classifications

• G09G2380/02

  Flexible displays · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10D86/471

  having different architectures, e.g. having both top-gate and bottom-gate TFTs · CPC title