Flexible display device with bend stress reduction member and manufacturing method for the same

Patent metadata

Field	Value
Publication number	US-9812659-B2
Application number	US-201615218928-A
Country	US
Kind code	B2
Filing date	Jul 25, 2016
Priority date	Sep 30, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

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.

First claim

What is claimed is:

1. A flexible organic light-emitting diode (OLED) display apparatus, comprising:
a bend allowance section between first and second flat portions of the flexible OLED display apparatus, wherein the bend allowance section is curved;
a micro-coating layer provided over a base layer of the flexible OLED display apparatus in an area between the first and second flat portions of the base layer;
a support member disposed along the first flat portion, the bend allowance section and the second flat portion, wherein the support member has a planar body portion and a rounded end portion arranged towards the bend allowance section; and
a plurality of wire traces disposed in the bend allowance section, wherein one or more insulation layers on the base layer are absent in a space between two adjacent wire traces.

2. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , wherein at least one of the plurality of wire traces includes a first part and a second part separated by a space between the first part and the second part, which is filled with the micro-coating layer.

3. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , further comprising an organic light-emitting diode (OLED) display unit disposed in the first flat portion, an encapsulation over the OLED display unit, and a printed circuit film in the second flat portion.

4. The flexible organic light-emitting diode (OLED) display apparatus of claim 3 , wherein the micro-coating layer is arranged to cover a part of the printed circuit film.

5. The flexible organic light-emitting diode (OLED) display apparatus of claim 3 , further comprising a first support film disposed on the support member in the first flat portion and a second support film disposed on the support member in the second flat portion, wherein the first support film and the encapsulation are arranged such that the first support film is extended out toward the bend allowance section further than the encapsulation film.

6. The flexible organic light-emitting diode (OLED) display apparatus of claim 5 , wherein one or both of the first support film and the second support film have a flange extending toward the bend allowance section.

7. The flexible organic light-emitting diode (OLED) display apparatus of claim 5 , further comprising a first adhesive layer on a surface of the body portion that faces the first flat portion of the base layer and second adhesive layer on a surface of the body portion that faces the second flat portion of the base layer, wherein the first adhesive layer includes a pad layer interposed between two adhesive layers.

8. The flexible organic light-emitting diode (OLED) display apparatus of claim 7 , wherein the pad layer interposed between the two adhesive layers is a polyolefin foam layer.

9. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , further comprising a light blocking material included in the base layer.

10. The flexible organic light-emitting diode (OLED) display apparatus of claim 9 , wherein the light blocking material is configured to pass light of certain polarization or light within specific wavelength ranges.

11. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , further comprising a first adhesive layer on a surface of the body portion in the first flat portion and second adhesive layer on a surface of the body portion in the second flat portion.

12. The flexible organic light-emitting diode (OLED) display apparatus of claim 11 , wherein the first adhesive layer is thicker than the second adhesive film.

13. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , wherein the support member is made of a plastic material.

14. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , wherein a thickness of the rounded end portion of the support member is greater than a thickness of the planar body portion of the support member.

15. The flexible organic light-emitting diode (OLED) display apparatus of claim 14 , wherein the rounded end portion of the support member has a hemispherical shape with a center shifted toward the first flat portion from a central axis of the body portion.

16. The flexible organic light-emitting diode (OLED) display apparatus of claim 14 , wherein the rounded end portion of the support member has a hemispherical shape with a part of the rounded end being positioned above a central axis of the body portion and another part of the rounded end being positioned below the central axis of the body portion.

17. The flexible organic light-emitting diode (OLED) display apparatus of claim 16 , wherein the part of the rounded end portion that is positioned above the central axis of the body portion of the support member is larger than the part of the rounded end portion that is positioned below the central axis of the body portion of the support member.

18. The flexible organic light-emitting diode (OLED) display apparatus of claim 1 , wherein the support member is formed of a sheet of a stainless steel.

Assignees

• Lg Display Co Ltd

Inventors

• Kwon Seyeoul
• Yang Heeseok
• Youn Sangcheon
• Kim Sungwoo
• Cho Yoondong
• Lee Saemleenuri

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title