Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2022013048-A1
Application number	US-202117192437-A
Country	US
Kind code	A1
Filing date	Mar 4, 2021
Priority date	Jul 10, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

A display device includes a display panel including a display area displaying an image, a non-display area adjacent to the display area, and a plurality of signal lines, and a driving circuit disposed in the non-display area, wherein the driving circuit includes a plurality of bumps arranged in a plurality of rows. The plurality of bumps include a crack detection bump arranged in at least one row among the plurality of rows, the plurality of signal lines include a crack detection line electrically connected to the crack detection bump, and at least a portion of the crack detection line is disposed adjacent to an edge of the driving circuit.

First claim

What is claimed is:

1 . A display device comprising:
a display panel including:
a display area displaying an image;
a non-display area adjacent to the display area; and
a plurality of signal lines; and
a driving circuit disposed in the non-display area, wherein the driving circuit comprises a plurality of bumps arranged in a plurality of rows, the plurality of bumps comprise a crack detection bump arranged in at least one row among the plurality of rows, the plurality of signal lines comprise a crack detection line electrically connected to the crack detection bump, and at least a portion of the crack detection line is disposed adjacent to an edge of the driving circuit.

2 . The display device of claim 1 , wherein
the driving circuit comprises:
at least one long side extending in a first direction parallel to the plurality of rows; and
at least one short side extending in a second direction intersecting the first direction, and
the at least a portion of the crack detection line is disposed adjacent to the at least one short side.

3 . The display device of claim 2 , wherein the crack detection line is disposed adjacent to at least a portion of the at least one long side of the driving circuit.

4 . The display device of claim 2 , further comprising a circuit board including a plurality of circuit board pads electrically connected to the display panel.

5 . The display device of claim 4 , wherein the crack detection line is electrically connected to at least a part of the plurality of circuit board pads.

6 . The display device of claim 5 , wherein
the plurality of circuit board pads comprise resistance test pads, and the crack detection line is electrically connected to the resistance test pads.

7 . The display device of claim 2 , wherein
the at least one short side comprises a first short side and a second short side spaced apart from the first short side in the first direction, and the crack detection line comprises:
a left crack detection line disposed adjacent to the first short side; and
a right crack detection line disposed adjacent to the second short side.

8 . The display device of claim 7 , wherein
the crack detection line comprises a connection crack detection line that electrically connects the left crack detection line and the right crack detection line, and the connection crack detection line is disposed adjacent to one of the at least one long side of the driving circuit.

9 . The display device of claim 1 , wherein
the crack detection line comprises a first detection line and a second detection line spaced apart from the driving circuit, and the first detection line is disposed between the second detection line and the driving circuit.

10 . The display device of claim 9 , wherein each of the first detection line and the second detection line comprises a structure forming a loop structure through a plurality of detection lines extending along the edge of the driving circuit.

11 . The display device of claim 10 , wherein the driving circuit comprises a comparison unit electrically connected to the crack detection bump.

12 . The display device of claim 11 , wherein the comparison unit applies a weight to compensate for a difference in wiring resistance between the first detection line and the second detection line.

13 . The display device of claim 10 , wherein
the crack detection bump comprises first to fourth crack detection bumps, the first detection line comprises a first input detection line electrically connected to the first crack detection bump and a first output detection line electrically connected to the second crack detection bump, and the second detection line comprises a second input detection line electrically connected to the third crack detection bump and a second output detection line electrically connected to the fourth crack detection bump.

14 . The display device of claim 13 , wherein
the first detection line has a structure in which the first input detection line and the first output detection line are connected to form a loop structure, and the second detection line comprises a structure in which the second input detection line and the second output detection line are connected to form a loop structure.

15 . The display device of claim 11 , wherein the driving circuit further comprises a connection line electrically connecting the crack detection bump and the comparison unit.

16 . The display device of claim 1 , wherein
the plurality of bumps comprise an output bump and an input bump, the plurality of signal lines comprise a data line electrically connected to the output bump or the input bump, and the data line and the crack detection line are disposed on different layers.

17 . The display device of claim 1 , wherein the crack detection bump comprises a dummy bump disposed at an end of at least one row among the plurality of rows.

18 . The display device of claim 1 , wherein the display panel comprises a module crack detection line disposed in the non-display area and at an outermost side of the display panel.

19 . A display device comprising:
a display panel including:
a display area displaying an image;
a non-display area adjacent to the display area; and
a plurality of signal lines; and
a driving circuit disposed in the non-display area, wherein the driving circuit comprises a bump disposed in at least one row extending in a first direction, the bump comprises a crack detection bump disposed in the at least one row, the driving circuit comprises at least one long side extending in the first direction and at least one short side extending in a second direction intersecting the first direction, and at least a part of the plurality of signal lines comprises a crack detection line disposed adjacent to the at least one short side of the driving circuit.

20 . A method of manufacturing a display device, the method comprising:
preparing a display panel including:
a display area displaying an image,
a non-display area adjacent to the display area, and
a crack detection line disposed in the non-display area;
preparing a driving circuit including at least one long side extending in a first direction and at least one short side extending in a second direction intersecting the first direction; pressing the driving circuit to the display panel so that the at least one short side of the driving circuit is disposed adjacent to the crack detection line; and determining whether a crack has occurred by measuring a resistance of the crack detection line.

21 . The method of claim 20 , further comprising electrically connecting a circuit board including a plurality of circuit board pads to the display panel, wherein
the crack detection line is electrically connected to resistance test pads among the plurality of circuit board pads, and the resistance test pads measure a resistance of the crack detection line to determine whether a crack has occurred.

22 . The method of claim 20 , wherein
the driving circuit comprises:
a crack detection bump electrically connected to the crack detection line; and
a comparison unit electrically connected to the crack detection bump, and
the comparison unit measures a resistance of the crack detection line to determine whether a crack has occurred.

23 . The method of claim 22 , wherein
the crack detection line comprises a first detection line and a second detection line spa

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hongam
• Cho Youngmin

Classifications

• H10K71/40

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G3/20 Primary

  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} · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title