Rollable display device

Patent metadata

Field	Value
Publication number	US-10264687-B2
Application number	US-201715626501-A
Country	US
Kind code	B2
Filing date	Jun 19, 2017
Priority date	Jul 6, 2016
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A rollable display device includes a roller, a display panel configured to be wound around the roller in a wound-up configuration and to display an image in an unwound configuration, a housing configured to house the display panel in the wound-up configuration and the roller, and a roller controller connected to the roller and configured to change a radius of the roller.

First claim

What is claimed is:

1. A rollable display device comprising:
a roller;
a display panel configured to be wound around the roller in a wound-up configuration and to display an image in an unwound configuration;
a housing configured to house the display panel in the wound-up configuration and the roller; and
a roller controller connected to the roller, configured to change a radius of the roller, and including a sensor that is connected to the roller and senses a rotation of the roller and a stopping of the rotation of the roller, wherein when the display panel is in the wound-up configuration and the sensor detects that the roller has stopped rotating, the sensor will send a signal for the roller controller to reduce the radius of the roller.

2. The rollable display device of claim 1 , further comprising
a dummy panel connected to the roller and one end of the display panel.

3. The rollable display device of claim 2 , wherein
one end of the dummy panel is fixed to the roller.

4. The rollable display device of claim 1 , wherein the roller controller includes:
a radius varying driver that is connected to the sensor and the roller and is configured to change the radius of the roller.

5. The rollable display device of claim 4 , wherein the roller includes:
a fixing portion extending in a radial direction from a rolling axis corresponding to a rotational central axis of the roller,
a variable portion of which one end is connected to the fixing portion, and
a roller case housing the fixing portion and the variable portion.

6. The rollable display device of claim 5 , wherein
the roller case is adhered to the other end of the variable portion.

7. The rollable display device of claim 5 , wherein
the fixing portion configured to be inserted into the variable portion, and
when the variable portion is inserted into the fixing portion, the radius of the roller is reduced.

8. The rollable display device of claim 5 , wherein
the roller case includes a flexible film.

9. The rollable display device of claim 4 , wherein
the roller includes a roller case including a first end and a second end, and
the roller case is wound such that the first end and the second end face each other.

10. The rollable display device of claim 9 , wherein
when the first end of the roller case is wound in an inside direction toward a roiling axis corresponding to a rotational central axis of the roller, wherein the radius of the roller is reduced.

11. The rollable display device of claim 9 , wherein
the roller case includes a flexible film.

12. The rollable display device of claim 1 , wherein
the housing including a panel opening through which the display panel passes through in an unwound configuration.

13. The rollable display device of claim 12 , further comprising
a panel fixing portion configured to be positioned at one end of the display panel and to have a height larger than a width of the panel opening.

14. The rollable display device of claim 1 , further comprising a pressing portion configured to connect to a panel fixing portion connected to the display panel, wherein the pressing portion pushes or pulls the panel fixing portion.

15. The rollable display device of claim 1 , wherein
the inside of the roller is filled.

16. A rollable display device comprising:
a display panel;
a roller configured to receive the display panel in a wound-up configuration and including a fixing portion including a plurality of ends extending in different radial directions from a rolling axis corresponding to a rotational central axis of the roller, and a plurality of variable portions, wherein each variable portion includes a first end connected to the fixing portion and is configured to withdraw into one end of the plurality of ends of the fixing portion toward the rolling axis;
a housing configured to house the display panel in the wound-up configuration, the housing includes an opening, which the display panel passes through in an unwound configuration;
a sensor to detect a rotation of the roller; and
a radius varying driver connected to the sensor and the plurality of variable portions and configured to alter a radius of the roller.

17. The rollable display device of claim 16 , wherein the roller includes a roller case including a flexible film.

18. The rollable display device of claim 17 , wherein each variable portion includes a second end, opposite to the first end of each variable portion, connected to the roller case, and wherein the roller case houses the fixing portion and the plurality of variable portions.

19. The rollable display device of claim 1 , wherein the housing includes a panel opening, and when the sensor senses that the panel opening and the sensor are substantially aligned, the sensor generates the sensing signal for controlling the rotation of the roller.

Assignees

• Samsung Display Co Ltd

Inventors

• Choi Jin Hwan
• Kim Sun Ho
• Kim Jeong Ho
• Park Bo Ik
• Seo Tae An
• Lee Jung Hun

Classifications

• H05K5/0217

  Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03) · CPC title

• H05K5/0247

  Electrical details of casings, e.g. terminals, passages for cables or wiring · CPC title

• H05K5/0017 Primary

  with operator interface units · CPC title

• G09F9/301 Primary

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

• G02F1/133305

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