Display apparatus with crack detection

Patent metadata

Field	Value
Publication number	US-11800776-B2
Application number	US-202117504245-A
Country	US
Kind code	B2
Filing date	Oct 18, 2021
Priority date	Feb 19, 2021
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

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 first pad at one side of the peripheral area;
a first semiconductor layer disposed on the display area;
a first conductive layer interposed between the substrate and the first semiconductor layer, and includes a first electrode on the display area, and a first crack detection electrode, the first crack detection electrode including a first end portion at the one side of the peripheral area and a second end portion at another side of the peripheral area;
a second conductive layer disposed on the first semiconductor layer, and includes a second electrode at least partially overlapping the first semiconductor layer, and a second crack detection electrode, the second crack detection electrode including a first end portion located at the one side of the peripheral area and a second end portion connected to the second end portion of the first crack detection electrode; and
a third conductive layer disposed on the second conductive layer, and includes a third electrode on the display area, and a first auxiliary electrode, the first auxiliary electrode 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.

2. The display apparatus of claim 1 , further including a first voltage line electrically connected to the first end portion of the first crack detection electrode and the first end portion of the second crack detection electrode.

3. The display apparatus of claim 2 , further comprising:
a second voltage line electrically connected to the first pad;
a first data line and a second data line that are disposed on the display area and extend in a first direction;
a first switch connected between the first voltage line and the first data line; and
a second switch connected between the second voltage line and the second data line.

4. The display apparatus of claim 3 , wherein the first switch and the second switch are simultaneously controlled.

5. The display apparatus of claim 1 , further comprising:
a first voltage line electrically connected to the first end portion of the first crack detection electrode; and
a second voltage line electrically connected to the first end portion of the second crack detection electrode.

6. The display apparatus of claim 5 , further comprising:
a third voltage line electrically connected to the first pad;
first to third data lines that are disposed on the display area and extend in a first direction;
a first switch connected between the first voltage line and the first data line;
a second switch connected between the second voltage line and the second data line; and
a third switch connected between the third voltage line and the third data line.

7. The display apparatus of claim 6 , wherein the first switch, the second switch, and the third switch are simultaneously controlled.

8. The display apparatus of claim 1 , further comprising:
a second pad electrically connected to the first end portion of the first crack detection electrode and the first end portion of the second crack detection electrode.

9. The display apparatus of claim 8 , further comprising:
a resistance measuring unit electrically connected to the first pad and the second pad.

10. The display apparatus of claim 1 , further comprising:
a second pad electrically connected to the first end portion of the first crack detection electrode; and
a third pad electrically connected to the first end portion of the second crack detection electrode.

11. The display apparatus of claim 1 , wherein the first crack detection electrode extends along one edge of the substrate in the peripheral area,
the second crack detection electrode extends along the one edge in the peripheral area, and
the first auxiliary electrode extends along the one edge in the peripheral area.

12. The display apparatus of claim 1 , wherein the second crack detection electrode at least partially overlaps the first crack detection electrode.

13. The display apparatus of claim 1 , further comprising:
a semiconductor pattern having a first conductive region, a channel region, and a second conductive region;
a channel bottom electrode that overlaps the channel region, and is configured to receive a driving voltage;
a gate electrode overlapping the channel region;
an upper electrode overlapping the gate electrode; and
a line electrode electrically connected to one of the first conductive region and the second conductive region,
wherein the first semiconductor layer includes the semiconductor pattern,
the first conductive layer includes the channel bottom electrode,
the second conductive layer includes the gate electrode or the upper electrode, and
the third conductive layer includes the line electrode.

14. The display apparatus of claim 1 , further comprising:
a second semiconductor layer disposed on the second conductive layer in the display area; and
a fourth conductive layer interposed between the second semiconductor layer and the third conductive layer, and includes a fourth electrode overlapping a channel region of the second semiconductor layer, and a third crack detection electrode, the third crack detection electrode including a first end portion at the one side of the peripheral area and a second end portion connected to the second end portion of the first crack detection electrode and the first end portion of the first auxiliary electrode.

15. The display apparatus of claim 14 , further comprising:
a second pad electrically connected to the first end portion of the first crack detection electrode, the first end portion of the second crack detection electrode, and the first end portion of the third crack detection electrode.

16. The display apparatus of claim 14 , further comprising:
a second pad electrically connected to the first end portion of the first crack detection electrode;
a third pad electrically connected to the first end portion of the second crack detection electrode; and
a fourth pad electrically connected to the first end portion of the third crack detection electrode.

17. The display apparatus of claim 14 , wherein the first semiconductor layer includes a silicon semiconductor material, and the second semiconductor layer includes an oxide semiconductor material.

18. The display apparatus of claim 1 , wherein the first end portion of the first auxiliary electrode is directly connected to the second end portion of the first crack detection electrode and the second end portion of the second crack detection electrode through contact plugs.

19. The display apparatus of claim 1 , wherein at least one of the first crack detection electrode and the second crack detection electrode includes a plurality of zigzag patterns that are connected to each other in series.

20. The display apparatus of claim 1 , further comprising:
a second pad disposed at the one side of the peripheral area,
wherein the first conductive layer further includes a third crack detection electrode that includes a first end portion at the one side of the peripheral area and a second end portion adjacent to the second end portion of the first crack detection electrode on the other side of the peripheral area,
the second conductive layer further includes a fourth crack detection electrode that includes a first end portion at the one side of the peripheral area and a second end por

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