Rollable display device

Patent metadata

Field	Value
Publication number	US-10671124-B2
Application number	US-201916238388-A
Country	US
Kind code	B2
Filing date	Jan 2, 2019
Priority date	Jan 4, 2018
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A rollable display device includes: a window member; a first pressure sensitive adhesive member arranged under the window member; a display module detachable from and attachable to the window member by the first pressure sensitive adhesive member; a housing having a groove through which the window member, the first pressure sensitive adhesive member, and the display module are configured to enter and exit from the housing; a first rotation member on which the window member and the first pressure sensitive adhesive member are rollable or slidable; and a second rotation member on which the display module is rollable or slidable.

First claim

What is claimed is:

1. A rollable display device comprising:
a window member including a first window surface defined by a first direction and a second direction, and a second window surface opposite to the first window surface in a thickness direction;
a first pressure sensitive adhesive member fixed on the second window surface;
a display module facing the window member with the first pressure sensitive adhesive member arranged therebetween, the display module including a first module surface detachable from and attachable to the first pressure sensitive adhesive member; and a second module surface opposite to the first module surface;
a housing having a groove through which the window member, the first pressure sensitive adhesive member, and the display module are configured to enter and exit from the housing in the first direction;
a first rotation member in the housing and extending in the second direction, wherein the window member and the first pressure sensitive adhesive member are rollable or slidable on the first rotation member; and
a second rotation member spaced apart from the first rotation member in the housing and extending in the second direction, wherein the display module is rollable or slidable on the second rotation member.

2. The rollable display device of claim 1 , wherein, in an unrolled state, a length of the window member extending in the first direction is greater than a length of the display module extending in the first direction,
wherein the first rotation member is located under the first pressure sensitive adhesive member, and the second rotation member is located under the second module surface of the display module.

3. The rollable display device of claim 2 , wherein the first rotation member is farther away from the groove in the first direction than the second rotation member is from the groove.

4. The rollable display device of claim 1 , wherein, in an unrolled state, a length of the window member extending in the first direction is equal to a length of the display module extending in the first direction,
wherein the first rotation member is located on the first window surface of the window member, and the second rotation member is located under the second module surface of the display module.

5. The rollable display device of claim 4 , wherein a distance of the first rotation member from the groove in the first direction is equal to a distance of the second rotation member from the groove in the first direction.

6. The rollable display device of claim 1 , wherein the first pressure sensitive adhesive member includes an acrylic-based adhesive material.

7. The rollable display device of claim 1 , wherein the display module comprises:
a display panel to display an image;
a driving substrate electrically connected to the display panel and extending in the second direction; and
a connection substrate connecting the display panel and the driving substrate,
wherein the driving substrate is arranged in the second rotation member, and the display panel is rollable on the second rotation member.

8. The rollable display device of claim 1 , further comprising:
a handle extending in the second direction and coupled to the display module,
wherein the display module comprises:
a display panel to display an image;
a driving substrate electrically connected to the display panel and extending in the second direction; and
a connection substrate connecting the display panel and the driving substrate,
wherein the driving substrate is arranged in the handle, and the display panel is slidable on the second rotation member.

9. The rollable display device of claim 1 , further comprising a cleaning rotation member in the housing and located under the first pressure sensitive adhesive member to remove a foreign material attached to the first pressure sensitive adhesive member when the first pressure sensitive adhesive member and the display module are detached from each other.

10. The rollable display device of claim 1 , further comprising:
a protective member under the display module and comprising a first protective surface facing the second module surface, and a second protective surface opposite to the first protective surface, wherein the first protective surface is between the second module surface and the second protective surface;
a second pressure sensitive adhesive member which is fixed on the first protective surface and which is detachable from and attachable to the second module surface; and
a third rotation member spaced apart from the first and second rotation members in the housing, wherein the protective member and the second pressure sensitive adhesive member are rollable or slidable on the third rotation member.

11. The rollable display device of claim 10 , wherein the protective member comprises a plurality of supporting blocks extending in the second direction and arranged in the first direction, and
wherein adjacent ones of the supporting blocks are connected to each other by a hinge.

12. The rollable display device of claim 10 , wherein, in an unrolled state, a length of the window member extending in the first direction is greater than a length of the display module extending in the first direction, and, in the unrolled state, the length of the display module extending in the first direction is greater than a length of the protective member extending in the first direction,
wherein the first rotation member is located under the first pressure sensitive adhesive member, the second rotation member is located under the second module surface of the display module, and the third rotation member is located under the second protective surface of the protective member,
wherein the first rotation member is farther away from the groove in the first direction than the second rotation member is from the groove, and the second rotation member is farther away from the groove in the first direction than the third rotation member is from the groove.

13. The rollable display device of claim 10 , wherein, in an unrolled state, a length of the window member extending in the first direction is less than a length of the display module extending in the first direction, and, in the unrolled state, a length of the protective member extending in the first direction is less than or equal to the length of the display module extending in the first direction,
wherein the first rotation member is located on the window member, the second rotation member is located on the first module surface or under the second module surface of the display module, and the third rotation member is located under the second protective surface of the protective member,
wherein the first rotation member is closer to the groove in the first direction than the second rotation member, and
wherein the second rotation member is farther away from the groove in the first direction than the third rotation member, or a distance of the second rotation member from the groove in the first direction is equal to a distance of the third rotation member from the groove in the first direction.

14. The rollable display device of claim 10 , wherein each of the first, second, and third rotation members has a cylindrical shape,
wherein a radius of the first rotation member, a radius of the second rotation member, and a radius of the third rotation member are equal to each other, and
wherein the window member is rolled on the first rotation member, the display module is rolled on the second rotation member, and the protective member is rolled on the third rotation member.

15. The rollable display device of claim 10 ,

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jeongho
• Koo Hyunwoo
• Kim Kyuyoung
• Kim Taewoong
• Choi Jinhwan
• Kachatryan Hayk

Classifications

• H05K5/0017

  with operator interface units · CPC title

• G06F1/1652 Primary

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

• H01L2251/5338

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic

• G09F9/301

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title