Display panel and method of assembling display device having the same

Patent metadata

Field	Value
Publication number	US-10681806-B2
Application number	US-201916266465-A
Country	US
Kind code	B2
Filing date	Feb 4, 2019
Priority date	Mar 15, 2018
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A display panel includes a base having a first surface and a second surface disposed oppositely; a flexible printed circuit board disposed on a first surface of the base and bent toward a second surface of the base; and a mechanical strengthening element disposed on a second surface of the base and at least positioned at regions of the second surface corresponding to two side edges of the flexible printed circuit board.

First claim

What is claimed is:

1. A display panel, comprising: a first base, having a first surface and a second surface, the first surface and the second surface disposed oppositely; a flexible printed circuit board, disposed directly on the first surface of the first base and bent toward the second surface of the first base, wherein at least a portion of the flexible printed circuit board faces the second surface of the first base; another circuit board, directly connected to the flexible printed circuit board without being connected to the first base; and a mechanical strengthening element, disposed directly on the second surface of the first base, and the mechanical strengthening element at least positioned at regions of the second surface corresponding to two side edges of the flexible printed circuit board.

2. The display panel according to claim 1 , wherein the flexible printed circuit board is disposed on an outer lead bonding area of the first base, wherein a ratio of a width of the mechanical strengthening element to a width of the outer lead bonding area of the first base ranges from 0.8 to 2.0.

3. The display panel according to claim 1 , wherein the flexible printed circuit board is disposed on an outer lead bonding area of the first base, wherein a ratio of a length of the mechanical strengthening element to a width of the outer lead bonding area of the first base ranges from 3 to 8.

4. The display panel according to claim 1 , wherein the mechanical strengthening element has a width ranging from 3 mm to 5 mm, and a length ranging from 15 mm to 18 mm.

5. The display panel according to claim 1 , wherein in a cross-sectional view, the mechanical strengthening element has at least one arced protrusion.

6. The display panel according to claim 1 , wherein in a top view of the mechanical strengthening element, at least a portion of a shape of the mechanical strengthening element is arced.

7. The display panel according to claim 6 , wherein the shape of the mechanical strengthening element has a circular tail end or a cuspidal tail end.

8. The display panel according to claim 1 , comprising a lower polarizer disposed on the second surface of the first base, wherein the mechanical strengthening element neighbors the lower polarizer and is separated from the lower polarizer by at least a distance.

9. The display panel according to claim 1 , comprising a lower polarizer disposed on the second surface of the first base, wherein the mechanical strengthening element contacts one side surface of the lower polarizer.

10. The display panel according to claim 9 , comprising a second base and an upper polarizer, wherein the second base and the first base are disposed oppositely, and the upper polarizer is disposed on the second base, wherein a width of the lower polarizer is smaller than a width of the upper polarizer.

11. The display panel according to claim 1 , comprising a second base and an upper polarizer, wherein the second base and the first base are disposed oppositely, wherein the second base is a protection layer.

12. The display panel according to claim 1 , at least a portion of the first base is arced.

13. The display panel according to claim 12 , wherein in a top view of the first base, the first base comprises a first lateral side and a second lateral side disposed oppositely, and the first lateral side of the first base has a different curvature from the second lateral side of the first base.

14. The display panel according to claim 12 , wherein one side of the first base has at least two different curvatures.

15. The display panel according to claim 1 , wherein the flexible printed circuit board has a first side edge and a second side edge opposite to the first side edge and a third side edge; two connecting ends of the third side edge are respectively connected to the first side edge and the second side edge; the third side edge, a portion of the first side edge and a portion of the second side edge overlap with the first base in the top view of the first base; and the mechanical strengthening element is at least positioned at a first corner corresponding to one of the connecting ends between the first side edge of flexible printed circuit board and the third side edge of the flexible printed circuit board, and a second corner corresponding to the other one of the connecting ends between the second side edge and the third side edge.

16. A method of assembling a display device, comprising: providing a protection member; providing a display panel, which comprises a first base having a first surface and a second surface, and the first surface of the first base and the second surface of the first base are disposed oppositely, wherein a flexible printed circuit board is disposed directly on the first surface of the first base, and at least a portion of the flexible printed circuit board faces the second surface of the first base; providing another circuit board, directly connected to the flexible printed circuit board without being connected to the first base; bonding the display panel to the protection member; disposing a mechanical strengthening element directly on the second surface of the first base, wherein the mechanical strengthening element is at least positioned at regions corresponding to two side edges of the flexible printed circuit board; and bending the flexible printed circuit board backwardly toward the second surface of the first base after the mechanical strengthening element is disposed.

17. The method according to claim 16 , wherein the protection member at least has a curved surface, the display panel provided is a flat display panel, and the display panel is bonded toward the protection member having the curved surface upon bonding.

18. The method according to claim 16 , wherein the mechanical strengthening element is a glue, and the glue is one of a light curing glue, a heat curing glue, or a chemical reaction curing glue.

19. The method according to claim 16 , wherein after the mechanical strengthening element is disposed, an ultra-violet light source is provided to irradiate and cure the mechanical strengthening element.

20. The method according to claim 16 , wherein the flexible printed circuit board is disposed on an outer lead bonding area of the first base, wherein a ratio of a width of the mechanical strengthening element to a width of the outer lead bonding area of the first base ranges from 0.8 to 2.0.

Assignees

• Innolux Corp

Inventors

• Huang Kun-Feng

Classifications

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title

• H05K1/0281 Primary

  Reinforcement details thereof · CPC title

• H01L2251/5338

  Electricity · mapped topic

• H05K1/118

  specially for flexible printed circuits, e.g. using folded portions · CPC title

• H05K1/189

  characterised by the use of flexible or folded printed circuits · CPC title