Structure for flexible printed circuit boards

Patent metadata

Field	Value
Publication number	US-9974164-B2
Application number	US-201414904551-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Jul 24, 2013
Publication date	May 15, 2018
Grant date	May 15, 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;
two or more flexible printed circuit boards positioned at edges on the substrate and mounted with anode pads and cathode pads, the two or more flexible printed circuit boards including a first flexible printed circuit board and a second flexible printed circuit board; and
at least one of a soldering portion and a wire bonding portion which respectively make the anode pads and the cathode pads mounted on neighboring end portions of the first and second flexible printed circuit boards conduct electricity,
wherein a first end of the at least one of a soldering portion and a wire bonding portion is connected with the anode pad or the cathode pad of the first flexible printed circuit board, and a second end of the at least one of a soldering portion and a wire bonding portion is connected with the anode pad or the cathode pad of the second flexible printed circuit board, and
wherein the first flexible printed circuit board has an end portion and the second flexible printed circuit board has an end portion, the end portion of the first flexible printed circuit board overlaps the end portion of the second flexible printed circuit board, and the at least one of a soldering portion and a wire bonding portion overlaps each of the end portion of the first flexible printed circuit board and the end portion of the second flexible printed circuit board.

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

3. The structure of claim 1 , wherein the two or more flexible printed circuit boards include four bar-type flexible printed circuit boards.

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

5. The structure of claim 1 , wherein the anode pads and the cathode pads that are positioned on the end portions of the flexible printed circuit board are mounted in parallel to each other.

6. The structure of claim 1 , wherein the anode pads and the cathode pads that are positioned on the end portions of one side of the flexible printed circuit board are mounted in parallel to each other in a length direction of the flexible printed circuit board, and
the anode pads and the cathode pads that are positioned on the end portions of the other side of 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.

7. The structure of claim 6 , wherein the anode pad and the cathode pad that are mounted in the length direction of the flexible printed circuit board on the end portion of any one of the two or more flexible printed circuit boards and the anode pad and the cathode pad that are mounted in the direction that is perpendicular to the length direction of the flexible printed circuit board on the end portion of another neighboring flexible printed circuit board respectively conduct electricity through at least one of the soldering portion and the wire bonding portion.

8. The structure of claim 1 , wherein a width of the soldering portion is 0.1 to 2 mm.

9. The structure of claim 1 , wherein the soldering portion includes 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.

10. The structure of claim 1 , wherein the wire bonding portion has a diameter of 0.1 to 2 mm.

11. 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.

Assignees

• Lg Display Co Ltd

Inventors

• Oh Ducksu
• Park Sung Soo
• Kang Minsoo

Classifications

• H05K2201/10681

  Tape Carrier Package [TCP]; Flexible sheet connector · CPC title

• H05K2201/09418

  Special orientation of pads, lands or terminals of component, e.g. radial or polygonal orientation · CPC title

• H05K2201/046

  Planar parts of folded PCBs making an angle relative to each other · CPC title

• H05K2203/049

  Wire bonding · CPC title

• H05K1/14

  Structural association of two or more printed circuits (providing electric connection to or between printed circuits H05K1/11, H01R12/00) · CPC title