Display device

Patent metadata

Field	Value
Publication number	US-12507355-B2
Application number	US-202318379278-A
Country	US
Kind code	B2
Filing date	Oct 12, 2023
Priority date	Jan 5, 2023
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A display device includes a first roller extending in a first direction and provided with a first tunnel defined therein to extend in the first direction and rotates about a first rotational axis parallel to the first direction, a display module connected to the first roller and wound around or unwound from the first roller, an inner roller extending in the first direction and disposed in the first tunnel and which rotates about the first rotational axis, a first gear connected to each of opposite sides of the inner roller in the first direction, where the plurality of first gears is disposed on an outer surface of the first roller, and a first elastic body disposed in the first tunnel and connected to the inner roller and the first roller.

First claim

What is claimed is:

1 . A display device comprising:
a first roller extending in a first direction and provided with a first tunnel defined therein to extend in the first direction, wherein the first roller rotates about a first rotational axis parallel to the first direction; a display module connected to the first roller and wound around and unwound from the first roller; an inner roller extending in the first direction and disposed in the first tunnel, wherein the inner roller rotates about the first rotational axis; a first gear connected to each of opposite sides of the inner roller in the first direction, wherein the first gear is disposed on an outer surface of the first roller; and a first elastic body disposed in the first tunnel and connected to the inner roller and the first roller.

2 . The display device of claim 1 , wherein the first roller and the inner roller rotate in a same direction.

3 . The display device of claim 1 , further comprising:
a second roller extending in the first direction and spaced apart from the first roller in a second direction crossing the first direction, wherein the second roller is provided with a second tunnel defined therein to extend in the first direction; a support part connected to the second roller and disposed under the display module, wherein the support part is wound around and unwound from the second roller; a second gear connected to each of opposite sides of the second roller in the first direction; a fixed bar extending in the first direction and disposed in the second tunnel; and a second elastic body disposed in the second tunnel and connected to the second roller and the fixed bar.

4 . The display device of claim 3 , wherein
the second roller rotates in a same direction as the first roller about a second rotational axis parallel to the first direction, and the fixed bar does not rotate.

5 . The display device of claim 3 , wherein an unwound portion of the support part, when viewed in the second direction, is in a shape convexly curved upward.

6 . The display device of claim 3 , further comprising:
a third roller extending in the first direction and disposed between the first roller and the second roller; and a third gear disposed on each of opposite sides of the third roller in the first direction, wherein the third gear is disposed between the first gear and the second gear and engaged with the first gear and the second gear.

7 . The display device of claim 6 , wherein the third roller rotates about a third rotational axis parallel to the first direction in a direction opposite to a direction in which the first roller and the second roller rotate.

8 . The display device of claim 6 , further comprising:
a housing which accommodates the first roller, the second roller, and the third roller; and a handle connected to at least one selected from the display module and the support part.

9 . The display device of claim 8 , further comprising:
a first protrusion extending from the first gear in the first direction; a second protrusion extending from the second gear in the first direction; and a third protrusion extending from the third gear in the first direction, wherein the first, second, and third protrusions are disposed in fastening recesses defined on the housing.

10 . The display device of claim 8 , wherein the fixed bar penetrates the second gear and is connected to the housing.

11 . The display device of claim 3 , wherein one end of the second elastic body passes through a fixed opening defined through the fixed bar and is connected to an outer surface of the fixed bar, and
wherein an opposite end of the second elastic body is connected to an inner circumferential surface of the second roller.

12 . The display device of claim 1 , wherein one end of the first elastic body is connected to the inner roller, and an opposite end of the first elastic body is connected to an inner circumferential surface of the first roller.

13 . The display device of claim 12 , wherein the first elastic body includes a spiral spring.

14 . The display device of claim 12 , wherein the first elastic body includes a torsion spring.

15 . The display device of claim 14 , wherein the torsion spring includes:
a helical portion surrounding the inner roller; a first antenna extending from one side of the helical portion in the first direction and connected to the inner roller; and a second antenna extending from an opposite side of the helical portion in a second direction crossing the first direction and connected to the inner circumferential surface of the first roller.

16 . A display device comprising:
a first roller part extending in a first direction; a display module connected to the first roller part and wound around and unwound from the first roller part; a second roller part extending in the first direction and spaced apart from the first roller part in a second direction crossing the first direction, wherein the second roller part includes a second gear disposed on each of opposite sides thereof in the first direction; and a third roller part extending in the first direction and disposed between the first roller part and the second roller part, wherein the third roller part includes a third gear disposed on each of opposite sides thereof in the first direction, wherein the first roller part includes:
a first roller provided with a first tunnel defined therein to extend in the first direction, wherein the first roller rotates about a first rotational axis parallel to the first direction;
an inner roller disposed in the first tunnel and extending in the first direction;
a first gear connected to each of opposite sides of the inner roller in the first direction, wherein the first gear is disposed on an outer surface of the first roller; and
a first elastic body disposed in the first tunnel and connected to the inner roller and the first roller, and
wherein the first, second, and third gears are engaged with each other to rotate.

17 . The display device of claim 16 , wherein the inner roller rotates in a same direction as the first roller about the first rotational axis.

18 . The display device of claim 16 , wherein the first and second gears rotate in a same direction as each other, and the third gear rotate in a direction opposite to the direction in which the first and second gears rotate.

19 . The display device of claim 16 , wherein the second roller part includes:
a second roller provided with a second tunnel defined therein to extend in the first direction; a support part connected to the second roller and disposed under the display module, wherein the support part is wound around and unwound from the second roller; a fixed bar disposed in the second tunnel; and a second elastic body disposed in the second tunnel and connected to the second roller and the fixed bar.

20 . The display device of claim 19 , wherein the second roller rotates about a second rotational axis parallel to the first direction, and
wherein the fixed bar does not rotate about the second rotational axis.

21 . An electronic device for providing an image comprising:
a display device comprising: a first roller extending in a first direction and provided with a first tunnel defined therein to extend in the first direction, wherein the first roller rotates about a first rotational axis parallel to the first direction; a display module connected to the first roller and wound around and

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sangjun
• Kim Beomjin
• Ahn Jaeho
• Jang Cheol

Classifications

• H10K2102/311

  Flexible OLED · CPC title

• F16H1/20

  involving more than two intermeshing members · CPC title

• H04M1/0237

  Sliding mechanism with one degree of freedom · CPC title

• H04M1/0268

  including a flexible display panel · CPC title

• G06F1/1618

  the display being foldable up to the back of the other housing with a single degree of freedom, e.g. by 360° rotation over the axis defined by the rear edge of the base enclosure · CPC title