Display device

Patent metadata

Field	Value
Publication number	US-2016306392-A1
Application number	US-201615002337-A
Country	US
Kind code	A1
Filing date	Jan 20, 2016
Priority date	Apr 16, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

A display device includes a flexible display panel; a window film; an adhesive layer between the flexible display panel and the window film; a modification layer between the window film and the adhesive layer; and a field generator for supplying an electric field or a magnetic field to the modification layer, wherein hardness of the modification layer is configured to be changed by the electric field or by the magnetic field.

First claim

What is claimed is:

1 . A display device comprising:
a flexible display panel; a window film; an adhesive layer between the flexible display panel and the window film; a modification layer between the window film and the adhesive layer; and a field generator for supplying an electric field or a magnetic field to the modification layer, wherein hardness of the modification layer is configured to be changed by the electric field or by the magnetic field.

2 . The display device of claim 1 , wherein the field generator is on the flexible display panel.

3 . The display device of claim 2 , wherein the field generator is a touch sensing layer that is configured to generate the magnetic field during operation.

4 . The display device of claim 1 , wherein the hardness of the modification layer is configured to be increased when the electric field or the magnetic field is applied.

5 . The display device of claim 4 , wherein 100% modulus of the modification layer is about 5 Gpa or higher at room temperature when the electric field or the magnetic field is applied.

6 . The display device of claim 4 , wherein 100% modulus of the modification layer is 0.05 Mpa or less at room temperature when the electric field or the magnetic field is not applied.

7 . The display device of claim 1 , wherein the modification layer comprises a magnetorheological fluid.

8 . The display device of claim 1 , wherein a thickness of the modification layer is about 10 μm to about 100 μm.

9 . The display device of claim 1 , wherein the window film comprises a base film and a hard coating layer.

10 . The display device of claim 9 , wherein the modification layer is between the base film and the hard coating layer of the window film.

11 . The display device of claim 1 , wherein the field generator is directly connected to the modification layer to supply the electric field or the magnetic field.

12 . The display device of claim 1 , further comprising a touch sensing layer on the flexible display panel,
wherein the field generator is configured to directly supply the electric field or the magnetic field to the modification layer separately from the touch sensing layer.

13 . The display device of claim 3 , wherein the display device is configured to be hardened when the electric field or the magnetic field is applied to the modification layer, and
wherein the display device is configured to be flexible and bendable when the electric field or the magnetic field is not applied to the modification layer.

14 . The display device of claim 1 , wherein the adhesive layer comprises a pressure reaction adhesive (PSA).

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jung Ho

Classifications

• 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

• G06F3/046

  by electromagnetic means · CPC title

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• G06F1/1652 Primary

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