Flexible printed circuit boards structure

Patent metadata

Field	Value
Publication number	US-9907171-B2
Application number	US-201414905728-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Jul 24, 2013
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A flexible printed circuit board installed on a substrate in a display device is provided.

First claim

The invention claimed is:

1. A structure of a flexible printed circuit board comprising:
a substrate; and
two or more flexible printed circuit boards positioned at edges on the substrate,
wherein an anode lead terminal and a cathode lead terminal are installed on an end portion of one side of the flexible printed circuit board to protrude in a length direction of the flexible printed circuit board and an anode pad and a cathode pad are mounted on an end portion of the other side of the flexible printed circuit board, and
wherein the anode lead terminal and the cathode lead terminal of any one of the flexible printed circuit boards correspondingly overlap the anode pad and the cathode pad of the end portion of another neighboring flexible printed circuit board to conduct electricity with each other through a conductive material.

2. A structure of a flexible printed circuit board comprising:
a substrate;
a pair of lower flexible printed circuit boards facing each other at edges on the substrate and provided with anode pads and cathode pads mounted on end portions of both sides thereof; and
a pair of upper flexible printed circuit boards facing each other at edges on the substrate and provided with anode lead terminals and cathode lead terminals installed on end portions of both sides thereof to protrude in a length direction thereof,
wherein the anode lead terminal and the cathode lead terminal of the upper flexible printed circuit board, which neighbors the lower flexible printed circuit board, correspondingly overlap the anode pad and the cathode pad of the lower flexible printed circuit board to conduct electricity with each other through a conductive material.

3. The structure of claim 1 , wherein the flexible printed circuit board is a bar-type flexible printed circuit board.

4. The structure of claim 1 , wherein the flexible printed circuit board has a width of 1 to 5 mm.

5. The structure of claim 1 , wherein the anode pad and the cathode pad mounted on the flexible printed circuit board are mounted in parallel to each other in a direction that is perpendicular to the length direction of the flexible printed circuit board.

6. The structure of claim 1 , wherein the conductive material is formed by soldering.

7. The structure of claim 6 , wherein solder that is used for the soldering is any one of brass solder, silver solder, german silver solder, manganese solder, gold solder, a lead-tin alloy, a lead-tin-zinc alloy, a lead-cadmium alloy, zinc-cadmium solder and a lead-tin-bismuth-based alloy.

8. The structure of claim 1 , wherein the flexible printed circuit board has a multilayer structure including two or more layers.

9. The structure of claim 8 , wherein the anode lead terminal and the cathode lead terminal protrude from an end portion of an uppermost layer of the flexible printed circuit board in the length direction of the flexible printed circuit board.

10. The structure of claim 1 , further comprising an anisotropic conductive film positioned between the substrate and the flexible printed circuit board to correspond to the flexible printed circuit board.

11. The structure of claim 2 , wherein the flexible printed circuit board is a bar-type flexible printed circuit board.

12. The structure of claim 2 , wherein the flexible printed circuit board has a width of 1 to 5 mm.

13. The structure of claim 2 , wherein the anode pad and the cathode pad mounted on the flexible printed circuit board are mounted in parallel to each other in a direction that is perpendicular to the length direction of the flexible printed circuit board.

14. The structure of claim 2 , wherein the conductive material is formed by soldering.

15. The structure of claim 14 , wherein solder that is used for the soldering is any one of brass solder, silver solder, german silver solder, manganese solder, gold solder, a lead-tin alloy, a lead-tin-zinc alloy, a lead-cadmium alloy, zinc-cadmium solder and a lead-tin-bismuth-based alloy.

16. The structure of claim 2 , wherein the flexible printed circuit board has a multilayer structure including two or more layers.

17. The structure of claim 16 , wherein the anode lead terminal and the cathode lead terminal protrude from an end portion of an uppermost layer of the flexible printed circuit board in the length direction of the flexible printed circuit board.

18. The structure of claim 2 , further comprising an anisotropic conductive film positioned between the substrate and the flexible printed circuit board to correspond to the flexible printed circuit board.

Assignees

• Lg Display Co Ltd

Inventors

• Oh Ducksu
• Park Sung Soo
• Kang Minsoo

Classifications

• H05K1/117

  Pads along the edge of rigid circuit boards, e.g. for pluggable connectors · CPC title

• H05K3/361

  Assembling flexible printed circuits with other printed circuits · CPC title

• H05K2201/05

  Flexible printed circuits [FPCs] · CPC title

• H05K1/147

  at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence) · CPC title

• H01L51/5203

  Electricity · mapped topic