Rollable flexible display device

Patent metadata

Field	Value
Publication number	US-9684340-B2
Application number	US-201514981225-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Jul 30, 2015
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

Disclosed is a rollable flexible display device. The rollable flexible display device includes, for example, a display panel, a source board, and a panel roller unit. The panel roller unit provides a mechanical structure for rolling the display panel and the source board along an outer circumferential surface thereof. The panel roller unit may have a region forming a curved surface and a region forming a planar surface.

First claim

What is claimed is:

1. A rollable flexible display device comprising:
a display panel configured to display an image;
a source board connected to the display panel and allowing a driver for providing a signal to the display panel to be mounted thereon; and
a panel roller unit configured to provide a mechanical structure for rolling the display panel and the source board along an outer circumferential surface thereof,
wherein the panel roller unit has a region forming a curved surface and a region forming a planar surface, and
wherein the region forming the planar surface corresponds to the driver, and a size of the region forming the planar surface is equal to or greater than a size of the driver.

2. The rollable flexible display device of claim 1 , wherein the panel roller unit has a depressed portion in the region forming the planar surface.

3. The rollable flexible display device of claim 2 , wherein the depressed portion has a buffer member attached to a surface thereof.

4. The rollable flexible display device of claim 2 , wherein a corner region of the depressed portion is rounded.

5. The rollable flexible display device of claim 1 , wherein the display panel comprises a first substrate, an intermediate layer having a display area including a plurality of pixels, and a second substrate attached to the first substrate so as to be sealed, and wherein the second substrate is formed of a metal.

6. The rollable flexible display device of claim 5 , wherein the first substrate has a non-etched region and an etched region having a thickness smaller than that of the non-etched region.

7. The rollable flexible display device of claim 6 , wherein the non-etched region is a region in which a pad part connecting the display panel and an external board is positioned.

8. The rollable flexible display device of claim 6 , wherein the panel roller unit comprises:
a first depressed portion in the region forming the planar surface and corresponding to the driver; and
a second depressed portion corresponding to the non-etched region.

9. The rollable flexible display device of claim 6 , wherein a thickness of the non-etched region ranges from 0.1 mm to 0.2 mm and a thickness of the etched region ranges from 0.01 mm to 0.2 mm.

10. The rollable flexible display device of claim 5 , wherein the second substrate has a protrusion protruding outwardly with respect to the first substrate.

11. The rollable flexible display device of claim 5 , wherein the first substrate has a thickness ranging from 0.01 mm to 0.2 mm.

12. The rollable flexible display device of claim 11 , wherein the first substrate formed of glass has a thickness ranging from 0.01 mm to 0.1 mm.

13. The rollable flexible display device of claim 5 , wherein the second substrate has a thickness ranging from 0.01 mm to 0.2 mm.

14. The rollable flexible display device of claim 1 , further comprising:
a receiving unit configured to receive the panel roller and the display panel.

15. The rollable flexible display device of claim 14 , wherein the receiving unit comprises a driving device to rotate the panel roller electrically.

16. The rollable flexible display device of claim 1 , wherein the display panel comprises a first substrate and a second substrate attached to the first substrate so as to be sealed, and
wherein the first substrate comprises a first portion and a second portion a width of which is thicker than that of the first portion.

17. The rollable flexible display device of claim 1 , further comprising: an auxiliary sheet configured to connect the display panel and the panel roller unit.

Assignees

• Lg Display Co Ltd

Inventors

• Han Changhoon
• Kim Bongchul
• Kim Jaehyun
• KIM Yongyub
• Park Jaewook
• Kim Woosub

Classifications

• H10K59/8721

  Metallic sealing arrangements · CPC title

• G06F1/1652 Primary

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

• G06F1/1601

  Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays (constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64) · CPC title

• G09G2380/02

  Flexible displays · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title