Flexible touch screen panel and flexible display device with the same

Patent metadata

Field	Value
Publication number	US-9423915-B2
Application number	US-201414338196-A
Country	US
Kind code	B2
Filing date	Jul 22, 2014
Priority date	Jul 25, 2013
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A flexible touch screen panel includes a window substrate, a polarizing functional layer, sensing patterns and sensing lines. The window substrate is flexible. The polarizing functional layer is attached on a first surface of the window substrate, and is divided into an active area and an inactive area positioned outside of the active area. The sensing patterns are formed in the active area on a first surface of the polarizing functional layer. The sensing lines are formed in the inactive area on the first surface of the polarizing functional layer, and are connected to the sensing patterns. In the touch screen panel, the polarizing functional layer has a laminated structure in which a polarizer and a retardation compensation film are attached on the first surface of the window substrate.

First claim

What is claimed is:

1. A flexible touch screen panel, comprising:
a flexible window substrate;
a polarizing functional layer attached on a first surface of the flexible window substrate, the polarizing functional layer being divided into an active area and an inactive area positioned outside of the active area;
sensing patterns in the active area on a first surface of the polarizing functional layer; and
sensing lines in the inactive area on the first surface of the polarizing functional layer, the sensing lines being connected to the sensing patterns,
wherein the polarizing functional layer has a laminated structure in which a polarizer and a retardation compensation film are attached on the first surface of the flexible window substrate, and an angle between an absorption axis of the polarizer and a bending axis of the touch screen panel is about 45 to about 90 degrees.

2. The flexible touch screen panel of claim 1 , wherein the polarizer is attached on the first surface of the flexible window substrate by a transparent adhesive layer, and the retardation compensation film is attached on a first surface of the polarizer through an other transparent adhesive layer.

3. The flexible touch screen panel of claim 2 , wherein each of the transparent adhesive layer and the other transparent adhesive layer is independently a solvent-type adhesive, a film-type adhesive, or a combination thereof.

4. The flexible touch screen panel of claim 3 , wherein the solvent-type adhesive is an aqueous poly vinyl alcohol (PVA) adhesive, a polyester-based adhesive, a polyurethane-based adhesive, or a combination thereof.

5. The flexible touch screen panel of claim 3 , wherein the film-type adhesive is a polyacryl-based adhesive, a polysilicon-based adhesive, or a combination thereof.

6. The flexible touch screen panel of claim 1 , wherein the flexible window substrate is made of polymethyl methacrylate, acryl, polyester, or a combination thereof.

7. The flexible touch screen panel of claim 1 , wherein the polarizer comprises a stretched polymer film, and the absorption axis of the polarizer is in a direction of stretching of the stretched polymer film.

8. The flexible touch screen panel of claim 7 , wherein the polymer film comprises a PVA-based resin material.

9. The flexible touch screen panel of claim 1 , wherein the sensing patterns comprise:
first sensing cells configured to be connected along a first direction;
first connecting lines configured to connect adjacent ones of the first sensing cells to each other;
second sensing cells configured to be connected along a second direction; and
second connecting lines configured to connect adjacent ones of the second sensing cells to each other.

10. The flexible touch screen panel of claim 9 , further comprising an insulating layer at points of intersection of the first connecting lines and the second connecting lines.

11. A flexible display device, comprising:
a flexible touch screen panel, comprising:
a flexible window substrate;
a polarizing functional layer attached on a first surface of the flexible window substrate, the polarizing functional layer being divided into an active area and an inactive area positioned outside of the active area;
sensing patterns in the active area on a first surface of the polarizing functional layer; and
sensing lines in the inactive area on the first surface of the polarizing functional layer, the sensing lines being connected to the sensing patterns,
wherein the polarizing functional layer has a laminated structure in which a polarizer and a retardation compensation film are attached on the first surface of the flexible window substrate, and an angle between an absorption axis of the polarizer and a bending axis of the touch screen panel is about 45 to about 90 degrees; and

a display device attached facing the sensing patterns and the sensing lines in a direction of the first surface of the flexible window substrate.

12. The flexible display device of claim 11 , wherein the flexible display device is an organic light emitting display device.

13. The flexible display device of claim 11 , wherein the window substrate is formed of polymethyl methacrylate, acryl, polyester, or a combination thereof.

14. The flexible display device of claim 11 , wherein the polarizer is attached on the first surface of the flexible window substrate by a transparent adhesive layer, and the retardation compensation film is attached on a first surface of the polarizer through an other transparent adhesive layer.

15. The flexible display device of claim 14 , wherein each of the transparent adhesive layer and the other transparent adhesive layer is independently a solvent-type adhesive, a film-type adhesive, or a combination thereof.

16. The flexible display device of claim 15 , wherein the solvent-type adhesive is an aqueous poly vinyl alcohol (PVA) adhesive, a polyester-based adhesive, a polyurethane-based adhesive, or a combination thereof.

17. The flexible display device of claim 15 , wherein the film-type adhesive is a polyacryl-based adhesive, a polysilicon-based adhesive, or a combination thereof.

18. The flexible display device of claim 11 , wherein the polarizer comprises a stretched polymer film, and the absorption axis of the polarizer is in a direction of stretching of the stretched polymer film.

19. The flexible display device of claim 18 , wherein the polymer film comprises a PVA-based resin material.

Assignees

• Samsung Display Co Ltd

Inventors

• Kang Sung-Ku
• Jung Tae-Hyeog
• Lee Kyu-Taek
• Lee Choon-Hyop
• Lee Jeong-Heon
• Min Gui-Nam

Classifications

• H04M1/0268

  including a flexible display panel · CPC title

• G02F2001/133531

  Physics · mapped topic

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F1/1652

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title