Rollable display device with separate rollers for display and display window

Patent metadata

Field	Value
Publication number	US-10143095-B2
Application number	US-201715683307-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Oct 17, 2016
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A rollable display device includes a display module, a window member, a housing in which the display module and the window member are configured to be rolled up and stored, the housing having a slot through which the display module and the window member are configured to move in and out, a first rotary member disposed inside the housing configured to roll up the display module, and a second rotary member disposed inside the housing, spaced from the first rotary member, and configured to roll up the window member.

First claim

What is claimed is:

1. A rollable display device comprising:
a display module having a first module surface and a second module surface opposed to the first module surface;
a window member disposed on the first module surface and having a first window surface and a second window surface opposed to the first window surface and disposed between the first window surface and the first module surface;
a housing in which the display module and the window member are configured to be rolled up and stored, the housing having a slot through which the display module and the window member are configured to move in and out;
a first rotary member disposed inside the housing configured to roll up the display module; and
a second rotary member disposed inside the housing, spaced from the first rotary member, and configured to roll up the window member.

2. The rollable display device of claim 1 , wherein the display module comprises:
a display panel configured to display an image;
a touch sensing unit disposed on the display panel;
a first elastic layer disposed on the touch sensing unit; and
a second elastic layer disposed under the display panel.

3. The rollable display device of claim 2 , wherein the display module further comprises:
a first adhesive layer disposed between the touch sensing unit and the first elastic layer; and
a second adhesive layer disposed between the display panel and the second elastic layer.

4. The rollable display device of claim 2 , wherein the first and second elastic layers each comprise at least one of thermoplastic polyurethane (TPU), polyurethane (PU), polydimethylsiloxane (PDMS), or polyamide (PA).

5. The rollable display device of claim 1 , the window member comprises:
a plastic film; and
a hard coating layer disposed on the plastic film.

6. The rollable display device of claim 1 , wherein the window member comprises:
a glass substrate; and
a shatterproof layer disposed under the glass substrate.

7. The rollable display device of claim 1 , further comprising a gap pattern disposed between the second window surface and the first module surface.

8. The rollable display device of claim 7 , wherein the gap pattern is attached to the second window surface.

9. The rollable display device of claim 7 , wherein the gap pattern comprises a light transmitting material.

10. The rollable display device of claim 7 , wherein the gap pattern comprises a plurality of first mesh lines each extending in a first direction and arranged in a second direction intersecting the first direction, and a plurality of second mesh lines each extending in the second direction and arranged in the first direction.

11. The rollable display device of claim 7 , wherein the gap pattern comprises a plurality of lines each extending in a first direction and arranged in a second direction intersecting the first direction.

12. The rollable display device of claim 7 , wherein the gap pattern comprises a plurality of dots protruding towards the first module surface from the second window surface.

13. The rollable display device of claim 1 , wherein each of the first and second rotary members has a cylindrical shape, the first rotary member has a first radius, and the second rotary member has a second radius greater than the first radius.

14. The rollable display device of claim 1 , wherein the first rotary member is disposed between the second rotary member and the slot of the housing, the first rotary member contacts the second module surface to roll up the display module, and the second rotary member contacts the second window surface to roll up the window member.

15. The rollable display device of claim 1 , wherein the second rotary member is disposed between the first rotary member and the slot of the housing, the first rotary member contacts the first module surface to roll up the display module, and the second rotary member contacts the first window surface to roll up the window member.

16. The rollable display device of claim 1 , wherein each of the first and second rotary members has a cylindrical shape, the first rotary member has a first radius, and the second rotary member has a second radius which is greater than the first radius.

17. The rollable display device of claim 1 , wherein each of the first and second rotary members has a cylindrical shape, and a first radius of the first rotary member and a second radius of the second rotary member are equal to each other.

18. A rollable display device comprising:
a display module including a display panel configured to display an image;
a window member disposed on the display module to protect the display module;
a first rotary member on which the display module is configured to be rolled up; and
a second rotary member spaced from the first rotary member and on which the window member is configured to be rolled up.

19. The rollable display device of claim 18 , further comprising a gap pattern disposed between the display module and the window member to maintain a gap between the display module and the window member.

20. The rollable display device of claim 18 , wherein the display module further comprises a first elastic layer disposed between the display panel and the window member and a second elastic layer disposed under the display panel.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sunho
• Kim Taewoong
• Park Boik

Classifications

• H01L27/323

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title

• 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

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title