Display device

Patent metadata

Field	Value
Publication number	US-11468801-B2
Application number	US-202017081300-A
Country	US
Kind code	B2
Filing date	Oct 27, 2020
Priority date	Nov 11, 2019
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A display device includes a display panel; a back cover disposed on a rear surface of the display panel to support the display panel; a roller disposed on a rear surface of the back cover, wherein the display panel and the back cover are wound around or unwound from the roller; a support bar disposed on a front surface of the display panel and fastened to the display panel and the back cover through fastening means; and at least one anti-shift means disposed on the rear surface of the back cover and fastened to a fastening groove of the roller when the display panel and the back cover are wound around the roller. Accordingly, it is possible to prevent cracks in the pad area and damages to the flexible film, thereby solving the issues of driving failure and reliability of the display panel.

First claim

What is claimed is:

1. A display device comprising:
a display panel;
a back cover disposed on a rear surface of the display panel and supporting the display panel;
a roller disposed on a rear surface of the back cover, wherein the display panel and the back cover are wound around or unwound from the roller;
a support bar disposed on a front surface of the display panel and fastened to the display panel and the back cover through fastening means; and
at least one anti-shifter disposed on the rear surface of the back cover and fastened to a fastening groove of the roller when the display panel and the back cover are wound around the roller.

2. The display device of claim 1 , further comprising:
at least one flexible film electrically connected to an end of the display panel and disposed on a surface of the back cover; and
a printed circuit board electrically connected to the at least one flexible film and disposed on another surface of the back cover.

3. The display device of claim 2 , wherein the roller has a cylindrical shape having an outer peripheral surface with a flat part and a curved part, and
wherein the printed circuit board is disposed on the flat part of the roller.

4. The display device of claim 3 , further comprising an accommodating groove formed inside the flat part of the roller,
wherein the printed circuit board is inserted and seated into the accommodating groove.

5. The display device of claim 1 , wherein the support bar has an outer circumferential surface forming an arc and a bottom forming a flat surface, and is disposed on a front surface of the display panel that is opposite to the back cover.

6. The display device of claim 3 , wherein a cross-section of the support bar and the curved part of the roller together form a circular shape.

7. The display device of claim 6 , wherein the cross section of the support bar has a semi-circular shape, an arc shape, a trapezoidal shape, or a combination of thereof.

8. The display device of claim 3 , wherein the fastening groove is formed in the curved part of the roller.

9. The display device of claim 1 , wherein the display panel further comprises a substrate divided into a display area and a non-display area, and
wherein the display device further comprises a protective layer disposed on the substrate in the non-display area.

10. The display device of claim 9 , further comprising a first anti-crack layer disposed under the substrate in the non-display area.

11. The display device of claim 10 , further comprising a barrier film disposed on a side surface of the first anti-crack layer.

12. The display device of claim 11 , further comprising a polarizing plate disposed on the first anti-crack layer and the barrier film.

13. The display device of claim 12 , further comprising the support bar disposed on the polarizing plate.

14. The display device of claim 12 , further comprising a tape interposed between the support bar and the polarizing plate and made of polyimide.

15. The display device of claim 12 , further comprising a second anti-crack layer disposed above the substrate in the non-display area.

16. The display device of claim 15 , wherein the second anti-crack layer is disposed on the protective layer.

17. The display device of claim 15 , further comprising a sealing layer disposed on the protective layer and/or the second anti-crack layer.

18. The display device of claim 17 , further comprising a fastening hole penetrating the support bar, the tape, the polarizing plate, the substrate, the protective layer, the first and second anti-crack layers, the sealing layer and a part of the back cover,
wherein the fastener fastens the support bar, the display panel and the back cover to one another through the fastening hole.

19. A display device comprising:
a display panel;
a back cover disposed on a rear surface of the display panel to support the display panel;
a roller disposed on a rear surface of the back cover, wherein the display panel and the back cover are wound around or unwound from the roller; and
a support bar disposed on a front surface of the display panel and fastened to the display panel and the back cover through fastener,
wherein the display panel comprises:
a substrate divided into a display area and a non-display area;
a first anti-crack layer disposed below the substrate in the non-display area; and
a second anti-crack layer disposed above the substrate in the non-display area, and
wherein the support bar is disposed over the first anti-crack layer.

20. The display device of claim 19 , wherein the roller has a cylindrical shape comprising an outer peripheral surface consisting of a flat part and a curved part, and
wherein the support bar is disposed on the flat part of the roller.

Assignees

• Lg Display Co Ltd

Inventors

• Oh Yeonjun

Classifications

• G09F9/301 Primary

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

• Y02E10/549

  Organic PV cells · CPC title

• G06F1/1652

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

• H01L51/5293

  Electricity · mapped topic