Organic light emitting diode

Patent metadata

Field	Value
Publication number	US-9899627-B2
Application number	US-201414904875-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Jul 24, 2013
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

An organic light emitting diode including a structure of a flexible printed circuit board installed on a substrate is provided.

First claim

The invention claimed is:

1. An organic light emitting display comprising:
a substrate including a light emitting portion having an anode, a cathode, and an organic layer of at least one layer arranged between the anode and the cathode, and a non-light emitting portion positioned on an outer side thereof;
four bar-type flexible printed circuit boards, each positioned at a respective edge of the substrate in the non-light emitting portion; and
at least one of a soldering portion and a wire bonding portion making the bar-type flexible printed circuit boards having neighboring end portions conduct electricity,
wherein each of the bar-type flexible printed circuit boards is connected to two other of the bar-type flexible printed circuit boards at the neighboring end portions by the at least one of the soldering portion or the wire bonding portion.

2. The organic light emitting display of claim 1 , wherein a width of the bar-type flexible printed circuit board is 1 to 5 mm.

3. The organic light emitting display of claim 1 , wherein a width of the soldering portion is 0.1 to 2 mm.

4. The organic light emitting display 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.

5. The organic light emitting display of claim 1 , wherein the wire bonding portion has a diameter of 0.1 to 2 mm.

6. The organic light emitting display of claim 1 , further comprising an anisotropic conductive film positioned between the substrate and the bar-type flexible printed circuit board to correspond to the flexible printed circuit board.

7. The organic light emitting display of claim 1 , wherein the bar-type flexible printed circuit boards do not overlap each other.

8. The organic light emitting display of claim 7 , wherein the bar-type flexible printed circuit boards are spaced apart from each other.

9. The organic light emitting display of claim 8 , wherein a gap distance between the bar-type flexible printed circuit boards is longer than 0 mm and equal to or smaller than 1 mm.

10. The organic light emitting display of claim 7 , wherein two pairs of anode pads and cathode pads are mounted on end portions of both sides of the bar-type flexible printed circuit boards, and
the soldering portion and the wire bonding portion make the anode pads and the cathode pads mounted on the end portion of any one of the bar-type flexible printed circuit boards and the anode pads and the cathode pads on the neighboring end portion of the other of the bar-type flexible printed circuit boards conduct electricity, respectively.

11. The organic light emitting display of claim 10 , wherein the anode pads and the cathode pads that are positioned on the end portions of the bar-type flexible printed circuit board are mounted in parallel to each other.

12. The organic light emitting display of claim 10 , wherein the anode pad and the cathode pad that are positioned on the end portion of one side of the bar-type flexible printed circuit board are mounted in parallel to each other in a length direction of the bar-type flexible printed circuit board, and
the anode pad and the cathode pad that are positioned on the end portion of the other side of the bar-type flexible printed circuit board are mounted in parallel to each other in a direction that is perpendicular to the length direction of the bar-type flexible printed circuit board.

13. The organic light emitting display of claim 10 , wherein the anode pad and the cathode pad that are mounted in a length direction of the bar-type flexible printed circuit board on the end portion of any one of the bar-type flexible printed circuit boards and the anode pad and the cathode pad that are mounted in a direction that is perpendicular to the length direction of the bar-type flexible printed circuit board on the end portion of another neighboring bar-type flexible printed circuit board conduct electricity, respectively, by the at least one of the soldering portion and the wire bonding portion.

14. The organic light emitting display of claim 1 , wherein the bar-type flexible printed circuit boards include a pair of lower flexible printed circuit boards positioned opposite to each other on the non-light emitting portion and mounted with anode pads and cathode pads, and a pair of upper flexible printed circuit boards positioned opposite to each other on the non-light emitting portion to partially overlap the lower flexible printed circuit boards and mounted with anode pads and cathode pads, and
the anode pads and the cathode pads of the upper flexible printed circuit boards and the anode pads and the cathode pads of the lower flexible printed circuit boards, which overlap each other, conduct electricity, respectively, by solder that fills a hole formed in a portion of the upper flexible printed circuit board that overlaps the lower flexible printed circuit board.

15. The organic light emitting display of claim 14 , wherein an end portion of the upper flexible printed circuit board overlaps an end portion of the lower flexible printed circuit board.

16. The organic light emitting display of claim 14 , wherein the hole is formed at the anode pad and the cathode pad of the upper flexible printed circuit board.

17. The organic light emitting display of claim 14 , wherein a diameter of the hole is equal to or smaller than a width of the anode pad and the cathode pad.

18. The organic light emitting display of claim 14 , wherein a distance between the center of the hole of the anode pad and the center of the hole of the cathode pad is 0.5 to 2 mm.

19. The organic light emitting display of claim 14 , wherein the upper flexible printed circuit board and the lower flexible printed circuit board have a multilayer structure including two or more layers.

20. The organic light emitting display of claim 19 , wherein an outermost layer of the upper flexible printed circuit board is installed to extend in a length direction of the upper flexible printed circuit board, and is positioned on the lower flexible printed circuit board so that an end portion of the outermost layer of the upper flexible printed circuit board overlaps the lower flexible printed circuit board.

21. The organic light emitting display of claim 1 , wherein an anode lead terminal and a cathode lead terminal are installed on an end portion of one side of the bar-type flexible printed circuit board to project in a length direction of the bar-type flexible printed circuit board, and an anode pad and a cathode pad are mounted on an end portion of the other side of the bar-type flexible printed circuit board, and
the anode lead terminal and the cathode lead terminal of any one of the bar-type flexible printed circuit boards correspondingly overlap the anode pad and the cathode pad of the end portion of another neighboring bar-type flexible printed circuit boards to conduct electricity with each other by the soldering portion.

22. The organic light emitting display of claim 1 , wherein the bar-type flexible printed circuit boards includes a pair of lower flexible printed circuit boards positioned opposite to each other on the non-light emitting portion and having anode pads and cathode pads mounted on end portions of both sides thereof, and a pair of upper flexible printed circuit boards positioned opposite to each other on the non-light emitting

Assignees

• Lg Display Co Ltd

Inventors

• Oh Ducksu
• Kang Minsoo

Classifications

• H05K1/14 Primary

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

• H01L51/5203

  Electricity · mapped topic

• H05K1/11

  Printed elements for providing electric connections to or between printed circuits · CPC title

• H01L51/5246 Primary

  Electricity · mapped topic

• H05K3/32

  electrically connecting electric components or wires to printed circuits · CPC title