Flexible Display Device With Space Reducing Wire Configuration And Manufacturing Method For The Same

• US 20160155788A1
• Filed: 11/28/2014
• Published: 06/02/2016
• Est. Priority Date: 11/28/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kwon, SeYeoul, Yang, Heeseok, LEE, Chanwoo, Youn, Sangcheon, Cho, YoonDong, Lee, Saemleenuri, Jo, Soyoung, Kim, Dongyoon, Ha, AnNa
• Granted Patent: US 9,627,463 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

There is provided a flexible display having a plurality of innovations configured to allow bending of a portion or portions to reduce apparent border size and/or utilize the side surface of an assembled flexible display.

Claims

1. A flexible display apparatus, comprising:

a flexible base layer having an active area and an inactive area, the active area including a plurality of pixels with one or more organic light-emitting diodes;

a first wire trace and a second wire trace positioned adjacent to each other on the flexible base layer, each of the first wire trace and the second wire trace including a trace of a conductive line covered with at least one insulation layer patterned according to the trace of the respective conductive line, wherein a space between the first wire trace and the second wire trace is free of said insulation layer patterned according to the traces of the conductive lines.

2. The flexible display apparatus of claim 1, wherein each of the first wire trace and the second wire trace is provided with a trace design that includes one or more of a non-linear sections with a convex side and a concave side, and the convex side of the non-linear section in one of the first and second wire traces is positioned next to the concave side of the non-linear section in the other wire trace.

3. The flexible display apparatus of claim 2, wherein the trace design of the first wire trace and the second wire trace comprises at least one of serpentine trace design, sine wave trace design and square wave trace design.

4. The flexible display apparatus of claim 2, wherein the trace design of the first wire trace and the trace design of the second wire trace are different from each other such that the non-linear section in one of the first and second wire traces is larger than the non-linear section in the other wire trace.

5. The flexible display apparatus of claim 2, wherein at least some portions of the first wire trace and the second wire trace are positioned in a bend allowance section of the flexible display.

6. The flexible display apparatus of claim 5, wherein said at least one insulation layer patterned according to the trace of the conductive line includes a buffer layer under the conductive line.

7. The flexible display apparatus of claim 6, wherein said at least one insulation layer patterned according to the trace of the conductive line includes a passivation layer on the conductive line.

8. The flexible display apparatus of claim 7, wherein the buffer layer under the first and second wire traces is thinner in the bend allowance section than the active area of the flexible display apparatus.

9. The flexible display apparatus of claim 7, wherein the buffer layer and the passivation layer include one or more sub-layers of silicon oxide or silicon nitride, and said one or more sub-layers of silicon oxide or silicon nitride are absent in the space between the first wire trace and the second wire trace.

10. The flexible display apparatus of claim 9, wherein the buffer layer has a lesser number of sub-layers under the first and second wire traces in the bend allowance section than the active area of the flexible display apparatus.

11. The flexible display apparatus of claim 7, further comprising a micro-coating layer over the portion of the first wire trace and the portion of the second wire trace positioned in the bend allowance section of the flexible display apparatus.

12. The flexible display apparatus of claim 4, wherein the first wire trace is configured to transmit data signals to a first group of pixel, and the second wire trace is configured to transmit data signals to a second group of pixels among the plurality of pixels in the active area.

13. A flexible display apparatus, comprising:

a flexible base layer having an active area and an inactive area, the active area including a plurality of pixels with one or more organic light-emitting diodes;

a first wire trace and a second wire trace on the flexible base layer, each having a trace design that includes an indented section between two distended sections of the respective wire trace, wherein the first wire trace and the second wire trace are arranged in a staggered configuration such that one of the distended sections of the first wire trace is aligned next to the indented section of the second wire trace.

14. The flexible display apparatus of claim 13, wherein a channel of space provided between the first wire trace and the second wire trace is absent of one or more insulation layers provided under and over the first wire trace and the second wire trace.

15. The flexible display apparatus of claim 13, wherein each of the first wire trace and the second wire trace includes a series of links connected in a chain.

16. The flexible display apparatus of claim 15, wherein at least one or more insulation layers provided under and over the first and second wire traces are absent in an open area at the middle of the link.

17. The flexible display apparatus of claim 16, wherein at least some portion of the first wire trace and at least some portion of the second wire trace are positioned in a bend allowance section of the flexible display apparatus.

18. The flexible display apparatus of claim 17, wherein the active area is provided in a central portion of the flexible display apparatus, and the bend allowance section is provided in the bend portion located at one of edges of the flexible display apparatus.

19. The flexible display apparatus of claim 18, wherein at least one of the first wire trace and the second wire trace has a grid trace design.

20. The flexible display apparatus of claim 18, further comprising a micro-coating layer over the portion of the first wire trace and the portion of the second wire trace positioned in the bend allowance section of the flexible display apparatus.

21. The flexible display apparatus of claim 17, wherein each of the first wire trace and the second wire trace includes a trace of a conductive line covered with at least one of the insulation layers patterned according to the trace of the respective conductive line.

22. The flexible display apparatus of claim 21, wherein at least one of the insulation layers patterned according to the trace of the conductive line includes a buffer layer under the conductive line.

23. The flexible display apparatus of claim 22, wherein at least one of the insulation layers patterned according to the trace of the conductive line includes a passivation layer on the conductive line.

24. The flexible display apparatus of claim 23, wherein the buffer layer under the first wire trace and the second wire trace is thinner in the bend allowance section than the active area of the flexible display apparatus.

25. The flexible display apparatus of claim 23, wherein the buffer layer and the passivation layer include one or more sub-layers of silicon oxide or silicon nitride, and

the one or more sub-layers of silicon oxide or silicon nitride are absent in the space between the first wire trace and the second wire trace.

26. The flexible display apparatus of claim 25, wherein the buffer layer has a lesser number of sub-layers under the first and second wire traces in the bend allowance section than the active area of the flexible display apparatus.

27. The flexible display apparatus of claim 21, wherein the trace design of the first wire trace and the second wire trace comprises at least one of serpentine trace design, sine wave trace design and square wave trace design.

28. The flexible display apparatus of claim 13, wherein the first wire trace is configured to transfer data signals to a first group of pixels, and the second wire trace is configured to transfer data signals to a second group of pixels among the plurality of pixels in the active area.