Flexible display and fixing method thereof

Patent metadata

Field	Value
Publication number	US-9829922-B2
Application number	US-201414223004-A
Country	US
Kind code	B2
Filing date	Mar 24, 2014
Priority date	Apr 25, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A flexible display includes a flexible substrate, a metal material coupled to the flexible substrate, and at least one electromagnet coupled to the flexible substrate. The electromagnet generates a force to attract the metal material when the flexible substrate changes from a first state to a second state. The force assists in holding the flexible substrate in the second state, which may be a rolled state, folded state, or another changed state. The flexible substrate includes a display area corresponding to a plurality of pixels for generating an image.

First claim

What is claimed is:

1. A flexible display, comprising:
a flexible display panel having a non-display area adjacent a display area, the flexible display panel including at least one electromagnet in the non-display area; and
a power supply to supply power to the at least one electromagnet when the flexible display panel is closed, wherein the flexible display panel is closed when in a rolled state and wherein the power supply is to continue supplying power to the at least one electromagnet after the flexible display panel is closed to hold the flexible display panel in a closed state.

2. The flexible display as claimed in claim 1 , wherein a plurality of electromagnets are positioned in opposing first and second sides of the non-display area.

3. The flexible display as claimed in claim 2 , wherein:
electromagnets positioned on the first side of the non-display area are arranged in a first line and spaced from each other,
electromagnets positioned on the second side of the non-display area are arranged in a second line and spaced from each other, and
the first line and the second line are substantially parallel to each other.

4. The flexible display as claimed in claim 2 , wherein the plurality of electromagnets are symmetrically arranged relative to the display area.

5. The flexible display as claimed in claim 1 , wherein the flexible display panel includes at least one metal plate positioned in the non-display area, and the electromagnet and the metal plate are positioned on different planes.

6. The flexible display as claimed in claim 5 , wherein the electromagnet overlaps the metal plate.

7. The flexible display as claimed in claim 5 , wherein:
when the power is supplied to the electromagnet when the flexible display panel is in the rolled state, the electromagnet generates a force to pull the metal plate to fix the flexible display panel in the rolled state.

8. The flexible display as claimed in claim 1 , wherein:
the flexible display panel includes at least one metal plate positioned in the non-display area, and
the electromagnet and the metal plate are positioned on a same plane.

9. The flexible display as claimed in claim 8 , wherein:
the electromagnet is positioned on one side of the non-display area, and
the metal plate is positioned on an opposing side of the non-display area.

10. The flexible display as claimed in claim 8 , wherein:
when the power is supplied to the electromagnet when the flexible display panel is in a folded state, the electromagnet generates a force to pull the metal plate to fix the flexible display panel in the folded state.

11. The flexible display as claimed in claim 1 , further comprising:
an electromagnet driver to drive the electromagnet,
wherein the electromagnet driver adjusts an amount of current applied to the electromagnet.

12. The flexible display as claimed in claim 1 , further comprising:
a plurality of metal plates positioned in the non-display area,
wherein, when in the rolled state, at least two metal plates and at least two electromagnets are overlapped.

13. A flexible display, comprising:
a flexible display panel, the flexible display panel including a flexible substrate and a device layer on the flexible substrate, the device layer including a first device layer and a second device layer that surrounds the first device layer, the second device layer including at least one electromagnet; and
a power supply to supply power to the at least one electromagnet when the flexible display panel is closed, wherein the power supply is to continue supplying power to the at least one electromagnet after the flexible display panel is closed to hold the flexible display panel in a closed state.

14. The flexible display as claimed in claim 13 , wherein:
the flexible display panel includes a non-display area around a display area,
the first device layer is positioned in the display area, and
the second device layer is positioned in the non-display area.

15. The flexible display as claimed in claim 14 , wherein the flexible substrate includes a metal material.

16. The flexible display as claimed in claim 14 , wherein:
the flexible display panel includes at least one metal plate positioned in the non-display area, and the metal plate is included in the flexible substrate.

17. The flexible display as claimed in claim 16 , wherein:
the flexible display panel includes the flexible substrate and a barrier layer between the flexible substrate and the device layer, and
the electromagnet overlaps the metal plate.

18. The flexible display as claimed in claim 16 , wherein:
the flexible display panel includes an encapsulation layer on the device layer, and
at least one of the electromagnet or the metal plate is exposed to an external surface of the flexible display panel.

19. A method for fixing a flexible display device, comprising:
changing a shape of a flexible display panel that includes at least one electromagnet; and
supplying power to the at least one electromagnet when the shape of the flexible display panel is changed to be closed, the power continuing to be supplied to the at least one electromagnet after the flexible display panel is closed to hold the flexible display panel in a closed state.

20. The method as claimed in claim 19 , wherein the flexible display panel includes a non-display area around a display area, and the electromagnet is positioned in the non-display area.

21. The method as claimed in claim 19 , wherein the flexible display panel includes at least one metal plate, and the changing the shape of the flexible display panel includes positioning the electromagnet to be adjacent to the metal plate that corresponds to the electromagnet.

22. A display, comprising:
a flexible substrate including a display area corresponding to a plurality of pixels;
a metal material coupled to the flexible substrate; and
at least one electromagnet coupled to the flexible substrate, the electromagnet to generate a force to attract the metal material when the flexible substrate changes from a first state to a second state, the force to assist in holding the flexible substrate in the second state, wherein the first state is an open state and the second state is a closed state and wherein the at least one electromagnet is to continue to apply the force after the flexible substrate changes to the closed state.

23. The display as claimed in claim 22 , wherein the metal material is a plate.

24. The display as claimed in claim 22 , wherein the metal material is included in another electromagnet.

Assignees

• Samsung Display Co Ltd

Inventors

• Hong Jun Woo
• Seo Hae Kwan

Classifications

• G06F1/1652 Primary

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

• G09F9/00 Primary

  Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) · CPC title