Display device

Patent metadata

Field	Value
Publication number	US-11636786-B2
Application number	US-202117166431-A
Country	US
Kind code	B2
Filing date	Feb 3, 2021
Priority date	Jun 3, 2020
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

A display device includes a display panel including a display area and a non-display area adjacent to the display area, and a driving circuit disposed on the non-display area. The driving circuit includes a plurality of bumps disposed in a plurality of rows, and a first alignment mark bump disposed at an end of at least one of the plurality of rows.

First claim

What is claimed is:

1. A display device comprising:
a display panel comprising a display area and a non-display area adjacent to the display area; and
a driving circuit disposed on the non-display area, the driving circuit comprising:
a driving chip;
a plurality of bumps extending away from a first surface of the driving chip and disposed in a plurality of rows, each of the plurality of bumps being able to electrically connect the driving circuit with circuit board pads of the non-display area; and
a first alignment mark bump extending away from the first surface of the driving chip and disposed at an end of at least one of the plurality of rows.

2. The display device of claim 1 , wherein
the plurality of bumps comprises a plurality of first bumps disposed in a first row among the plurality of rows, the first row being adjacent to the display area, and
the first alignment mark bump is disposed in the first row.

3. The display device of claim 2 , wherein
the plurality of first bumps comprises:
a plurality of second bumps disposed at a left side with respect to a first reference bump; and
a plurality of third bumps disposed on a right side with respect to the first reference bump,

the plurality of second bumps form an acute angle with respect to a reference line in a clockwise direction from the reference line to the plurality of second bumps, the reference line being at a center of the driving circuit in a direction intersecting a direction of the plurality of rows of the driving circuit, and
the plurality of third bumps form an acute angle with respect to the reference line in a counterclockwise direction from the reference line to the plurality of third bumps.

4. The display device of claim 2 , wherein the first alignment mark bump has a thickness substantially same as a thickness of each of the plurality of first bumps.

5. The display device of claim 2 , wherein the plurality of bumps further comprise dummy bumps disposed between the plurality of first bumps and the first alignment mark bump in the first row.

6. The display device of claim 2 , wherein the plurality of first bumps disposed in the first row comprises an output bump that outputs a driving signal that drives a light emitting element disposed in the display panel.

7. The display device of claim 2 , wherein
the first row in which the plurality of first bumps are disposed is arranged at an end of the driving circuit, and
the plurality of bumps comprise a plurality of input bumps disposed in an input row arranged at another end facing the end of the driving circuit.

8. The display device of claim 7 , wherein the driving circuit further comprises a second alignment mark bump disposed at an end of the input row.

9. The display device of claim 1 , wherein the display panel comprises:
a plurality of pads corresponding to the plurality of bumps; and
a panel alignment mark bump corresponding to the first alignment mark bump.

10. The display device of claim 1 , wherein a thickness of the first alignment mark bump is in a range of about 8 μm to about 10 μm.

11. The display device of claim 1 , wherein
the driving circuit further comprises an alignment inspection mark bump that overlaps the first alignment mark bump in a column direction, and
the alignment inspection mark bump has a thickness substantially same as a thickness of the first alignment mark bump.

12. The display device of claim 1 , wherein
the display panel comprises a first non-folding area, a folding area, and a second non-folding area, and
the folding area folds with respect to a folding axis.

13. The display device of claim 1 , wherein
the first alignment mark bump is disposed adjacent to an end of the driving chip.

14. The display device of claim 1 , further comprising:
an anisotropic conductive film disposed between the driving circuit and the display panel.

15. The display device of claim 1 , wherein the plurality of bumps and the first alignment mark bump comprise a same material.

16. The display device of claim 1 , wherein
the driving circuit further comprises a corner bump disposed at each of corners of the driving circuit, and
the corner bump has a thickness substantially same as a thickness of the first alignment mark bump.

17. The display device of claim 1 , wherein
the driving circuit has long sides extending in a direction parallel to the direction of the plurality of rows and short sides extending in a direction intersecting the direction of the plurality of rows,
the driving circuit further comprises a long side bump disposed adjacent to at least one of the long sides of the driving circuit, and
the long side bump has a thickness substantially same as a thickness of the first alignment mark bump.

18. The display device of claim 17 , wherein
the driving circuit further comprises edge bumps disposed adjacent to the long sides of the driving circuit and the short sides of the driving circuit, and
each of the edge bumps has a thickness substantially same as a thickness of the first alignment mark bump.

19. A display device comprising:
a display panel comprising a display area and a non-display area adjacent to the display area; and
a driving circuit disposed on the non-display area, the driving circuit comprising:
a driving chip;
a plurality of first bumps extending away from a first surface of the driving chip and disposed in a first row, each of the plurality of first bumps being able to electrically connect the driving circuit with circuit board pads of the non-display area;
a plurality of second bumps extending away from the first surface of the driving chip and disposed in a second row, each of the plurality of second bumps being able to electrically connect the driving circuit with circuit board pads of the non-display area; and
an alignment mark bump extending away from the first surface of the driving chip and disposed at an end of at least one of the first row or the second row.

20. The display device of claim 19 , wherein the plurality of first bumps, the plurality of second bumps, and the alignment mark bump have a substantially same thickness.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hongam
• Cho Youngmin

Classifications

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/3225

  using an active matrix · CPC title

• H10K59/129 Primary

  Chiplets · CPC title

• G09G3/035 Primary

  for flexible display surfaces · CPC title

• H10K59/88

  Dummy elements, i.e. elements having non-functional features · CPC title