Display device

Patent metadata

Field	Value
Publication number	US-10615245-B2
Application number	US-201816119940-A
Country	US
Kind code	B2
Filing date	Aug 31, 2018
Priority date	Jan 25, 2018
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

An exemplary embodiment provides a display device including: a display panel including a pad portion; and a flexible printed circuit film bonded to the pad portion, wherein the pad portion includes lighting pads positioned at a least one end thereof, the flexible printed circuit film includes dummy pads positioned at a portion corresponding to the lighting pads to overlap at least some of the lighting pads, and a number of the dummy pads is smaller than that of the lighting pads.

First claim

What is claimed is:

1. A display device comprising:
a display panel including a pad portion; and
a flexible printed circuit film bonded to the pad portion,
wherein the pad portion includes lighting pads positioned in at least one end thereof,
the flexible printed circuit film includes dummy pads positioned at a portion corresponding to the lighting pads to overlap at least some of the lighting pads,
a number of the dummy pads is smaller than a number of the lighting pads, and
a pitch of the dummy pads is greater than a pitch of the lighting pads.

2. The display device of claim 1 , wherein the pitch of the dummy pads is twice or more than the pitch of the lighting pads.

3. The display device of claim 2 , wherein, among the lighting pads, lighting pads overlapping the dummy pads and lighting pads that do not overlap the dummy pads are alternately positioned along a first direction corresponding to a longitudinal direction of the pad portion.

4. The display device of claim 1 , wherein the pad portion includes an alignment mark between the lighting pads and pads adjacent thereto.

5. The display device of claim 4 , wherein the flexible printed circuit film includes an alignment mark between the dummy pads and pads adjacent thereto.

6. The display device of claim 5 , wherein the lighting pads are rectangular and have long sides that are perpendicular to a first direction corresponding to a longitudinal direction of the pad portion, and
the pads adjacent to the lighting pads are parallelogrammic and have long sides that are inclined with respect to the first direction.

7. The display device of claim 6 , wherein the dummy pads are rectangular and have long sides that are perpendicular to the longitudinal direction of the pad portion, and
the pads adjacent to the dummy pads are parallelogrammic and have long sides that are inclined with respect to the longitudinal direction of the pad portion.

8. The display device of claim 1 , wherein a width of the lighting pads and a width of the dummy pads are substantially the same.

9. The display device of claim 1 , wherein a length of the lighting pads and a length of the dummy pads are substantially the same.

10. The display device of claim 1 , wherein the pad portion and the flexible printed circuit film are bonded to each other by an anisotropic conductive film including conductive particles.

11. A display device comprising:
a display panel including a pad portion; and
a flexible printed circuit film bonded to the pad portion,
wherein the pad portion includes lighting pads positioned in at least one end thereof,
the flexible printed circuit film includes dummy pads corresponding to the lighting pads,
the dummy pads are arranged in at least two rows, and
a pitch of the dummy pads is greater than a pitch of the lighting pads.

12. The display device of claim 11 , wherein a number of the dummy pads is equal to a number of the lighting pads.

13. The display device of claim 11 , wherein each of the lighting pads includes a relatively wide first portion and a relatively narrow second portion, and the dummy pads overlap the first portions of the lighting pads.

14. The display device of claim 13 , wherein the first portions and the second portions of the lighting pads are alternately positioned along a first direction corresponding to a longitudinal direction of the pad portion.

15. The display device of claim 13 , wherein a length of each of the first portions is shorter than a length of each of the second portions.

16. The display device of claim 13 , wherein a width of each of the first portions and a width of each of the dummy pads are substantially the same.

17. The display device of claim 13 , wherein a length of each of the first portions and a length of each of the dummy pads are substantially the same.

18. The display device of claim 11 , wherein the dummy pads include dummy pads positioned at a first row and dummy pads positioned at a second row, the pitch of the dummy pads positioned at the first row is the same as the pitch of the dummy pads positioned at the second row, and the pitch of the dummy pads positioned at the first row is twice the pitch of the lighting pads.

19. The display device of claim 11 , wherein some of the lighting pads include a relatively wide first portion and a relatively narrow second portion, while others of the lighting pads include the first portion but include no second portion, and the dummy pads overlap the first portions of the lighting pads.

Assignees

• Samsung Display Co Ltd

Inventors

• Choi Ha Young
• Kim Joon Sam
• Jung Wu Hyeon

Classifications

• G02F1/13458

  Terminal pads · CPC title

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• H01L2251/5392

  Electricity · mapped topic

• H01L27/3276 Primary

  Electricity · mapped topic

• H01L27/3223

  Electricity · mapped topic