Flexible display device, foldable electronic device including the same, and method of manufacturing flexible display device

Patent metadata

Field	Value
Publication number	US-10429893-B2
Application number	US-201414575469-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 30, 2013
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A flexible display device that may fold so that a neutral surface has a radius of curvature is provided. The flexible display device includes a plurality of panel layers that are sequentially stacked on one another and comprise a display panel layer configured to display an image and a transparent protective panel layer; and adhesive layers that sequentially adhere the plurality of panel layers to one another. An elastic modulus and a thickness of each of the adhesive layers and the plurality of panel layers are determined so that a neutral surface is located on a layer other than the display panel layer.

First claim

What is claimed is:

1. A flexible display device that is foldable so that a neutral surface thereof has a radius of curvature, the flexible display device comprising:
a plurality of panel layers that is sequentially stacked on one another, wherein the plurality of panel layers comprises a display panel layer configured to display an image, and a transparent protective panel layer; and
a plurality of adhesive layers that sequentially adhere the plurality of panel layers to one another,
wherein, based on an elastic modulus and a thickness of each of the plurality of adhesive layers and the plurality of panel layers, the neutral surface is located on a layer other than the display panel layer, and
wherein a position of the neutral surface is determined so that when the flexible display device is in a folding state, the transparent protective panel layer and the display panel layer simultaneously reach a yield strain.

2. A flexible display device that is foldable so that a neutral surface thereof has a radius of curvature, the flexible display device comprising:
a plurality of panel layers that is sequentially stacked on one another, wherein the plurality of panel layers comprises a display panel layer configured to display an image, and a transparent protective panel layer; and
a plurality of adhesive layers that sequentially adhere the plurality of panel layers to one another,
wherein, based on an elastic modulus and a thickness of each of the plurality of adhesive layers and the plurality of panel layers, the neutral surface is located on a layer other than the display panel layer, and
wherein the elastic modulus and the thickness of each of the plurality of adhesive layers and the plurality of panel layers are determined so that when the flexible display device is in a folding state, the transparent protective panel layer and the display panel layer simultaneously reach a yield strain.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Jun-Hyung
• Lee Won-Ho
• Seo Ho-Seong

Classifications

• G06F1/1679

  for locking or maintaining the movable parts of the enclosure in a fixed position, e.g. latching mechanism at the edge of the display in a laptop or for the screen protective cover of a PDA (G06F1/1681 takes precedence) · CPC title

• Y10T156/1028

  by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith · CPC title

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• G06F1/166

  related to integrated arrangements for adjusting the position of the main body with respect to the supporting surface, e.g. legs for adjusting the tilt angle · CPC title

• G06F1/1652 Primary

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title