Flexible display device having support layer with rounded edge

Patent metadata

Field	Value
Publication number	US-9847506-B2
Application number	US-201615164592-A
Country	US
Kind code	B2
Filing date	May 25, 2016
Priority date	Dec 15, 2014
Publication date	Dec 19, 2017
Grant date	Dec 19, 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 display apparatus, comprising:
a flexible base layer defined with a display area and a non-display area, the non-display area comprising a bent portion and a folded back portion, the folded back portion extending from the bent portion in a direction substantially parallel to the display area;
a support layer including a first support layer and a second support layer on a first surface of the flexible base layer, the first support layer being provided in the display area of the flexible base layer and the second support layer being provided in the folded back portion of the flexible base layer; and
a support member having an elongated body portion and a rounded end portion, wherein the bent portion of the flexible base layer is bent around the rounded end portion of the support member.

2. The flexible display apparatus of claim 1 , wherein the support member supports the flexible base layer and maintains a curvature at the bent portion of the flexible base layer.

3. The flexible display apparatus of claim 1 , wherein the support layer is not present at the bent portion of the flexible base layer to facilitate easier bending of the flexible base layer.

4. The flexible display apparatus of claim 1 , wherein the support member is formed of plastic materials or a folded thin sheet metal.

5. The flexible display apparatus of claim 1 , wherein the elongated body portion of the support member has a planar shape and is thinner than the rounded end portion of the support member.

6. The flexible display apparatus of claim 5 , wherein a lowest edge of the rounded end portion of the support member is in-line with a bottom surface of the elongated body portion of the support member, providing the support member with a flat bottom.

7. The flexible display apparatus of claim 5 , wherein neither top nor bottom surfaces of the elongated body portion of the support member is in-line with highest and lowest edges of the rounded end portion of the support member.

8. The flexible display apparatus of claim 1 , wherein a thickness of the rounded end portion of the support member is substantially the same as a thickness of the elongated body portion of the support member.

9. The flexible display apparatus of claim 1 , further comprising:
an adhesive layer placed on at least one of an upper surface and a lower surface of the elongated body portion of the support member.

10. The flexible display apparatus of claim 9 , wherein a height of the adhesive layer and the support layer between the support member and the base layer is at least equal to or greater than a vertical distance between highest edge of the rounded end portion of the support member and a surface of the elongated body portion of the support member where the adhesive layer is placed.

11. The flexible display apparatus of claim 9 , wherein the adhesive layer is formed of multiple layers, the multiple layers including a cushion layer of polyolefin foam interposed between an upper layer and a lower layer of the adhesive layer.

12. The flexible display apparatus of claim 1 , further comprising:
an array of display pixels in the bent portion of the flexible base layer.

13. A flexible display apparatus, comprising:
a flexible base layer defined with a first area, a second area and a bend allowance section between the first area and the second area of the flexible base layer;
a first support layer on a first side of the flexible base layer, the first support layer being provided in the first area;
a second support layer on the first side of the flexible base layer, the second support layer being provided in the second area; and
a support member between the first support layer and the second support layer, wherein the support member includes a rounded end portion, and the bend allowance section of the flexible base layer is wrapped around the rounded end portion of the support member.

14. The flexible display apparatus of claim 13 , wherein the flexible base layer and the support member are arranged so that the rounded end portion of the support member is positioned under the flexible base layer corresponding to the bend allowance section of the flexible base layer.

15. The flexible display apparatus of claim 13 , further comprising:
an encapsulation on a second side of the flexible base layer, the encapsulation provided in the first area, wherein the first support layer is extended out toward the bend allowance section further than the encapsulation, and an extra margin of the first support layer maintains a steady rate of curvature in the bend allowance section.

16. The flexible display apparatus of claim 15 , wherein the support member is placed under the first support layer with a margin between an edge of the first support layer and an upper tip of the support member.

17. The flexible display apparatus of claim 16 , wherein a distance between the edge of the second support layer and a lower tip of the rounded end portion of the support member is greater than a distance between the edge of the first support layer and an upper side support layer and an upper tip of the rounded end portion of the support member.

18. The flexible display apparatus of claim 13 , further comprising:
a micro-coating layer on a second side of the flexible base layer.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jun Seok

Classifications

• B32B2266/025

  Polyolefin · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title

• B32B2255/26

  Polymeric coating · CPC title

• B32B3/04

  characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material} · CPC title