Rollable display

Patent metadata

Field	Value
Publication number	US-10877525-B2
Application number	US-201715607109-A
Country	US
Kind code	B2
Filing date	May 26, 2017
Priority date	May 30, 2016
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A rollable display comprises a flexible display panel; at least one BRC member having one end coupled with an edge of the flexible display panel; a roller assembly having a roller coupled with another end of the BRC member and a motor for rotating the roller, the roller assembly being ascended while rolling the BRC member onto the roller when the motor is rotated in a first direction, and being descending while unrolling the BRC member from the roller when the motor is rotated in a second direction opposite to the first direction; and a panel guide part connected to the roller assembly and moved along with the roller assembly; wherein the flexible display panel is rolled onto the panel guide part when the roller assembly and the panel guide part ascend, and is unrolled from the panel guide part when the roller assembly and the panel guide part descend.

First claim

What is claimed is:

1. A rollable display comprising:
a flexible display panel;
at least one Bistable Reeled Composite (BRC) member having a first end mechanically coupled to a first edge of the flexible display panel, the BRC member being rollable along a longitudinal direction between the first end and a second end opposite the first end, the BRC member having a bend along a width of the BRC member in an unrolled state and being unbent along the width in a rolled state;
a roller assembly including a roller mechanically coupled to the second end of the BRC member, and a motor for rotating the roller, the roller assembly being movable to ascend with respect to the first edge of the flexible display panel while rolling the BRC member onto the roller when the motor is rotated in a first direction, and to descend with respect to the first edge of the flexible display panel while unrolling the BRC member from the roller when the motor is rotated in a second direction opposite to the first direction; and
a panel guide connected to the roller assembly and movable in conjunction with the roller assembly;
wherein the flexible display panel is rolled onto the panel guide when the roller assembly and the panel guide ascend, and is unrolled from the panel guide when the roller assembly and the panel guide descend, and
wherein the BRC member has a length between the roller assembly and the first edge of the flexible display panel, the length of the BRC member decreases when the roller assembly and the panel guide ascend, and the length of the BRC member increases when the roller assembly and the panel guide descend, and
wherein the panel guide includes:
a guide rail that defines a spiral trajectory; and
a guide shaft having a shape extending in a direction of a central axis, the flexible display panel being rollable with respect to the central axis, the guide shaft movable fastened to the guide rail,
wherein the guide shaft is coupled to a second edge of the flexible display panel, the second edge being opposite from the first edge, and the guide shaft guides the flexible display panel along the spiral trajectory of the guide rail.

2. The rollable display of claim 1 , comprising a plurality of BRC members, wherein at least one of the BRC members is spaced apart from at least one other of the BRC members.

3. The rollable display of claim 2 , wherein each of the plurality of the BRC members is driven by the motor.

4. The rollable display of claim 1 , wherein the second end of the BRC member is coupled to the roller in an unbent state along the width of the BRC member.

5. The rollable display of claim 4 , further comprising an upper frame attached to the first edge of the flexible display panel,
wherein the upper frame mechanically couples the first end of the BRC member to the first edge of the flexible display panel, with the BRC member being in a bent state along the width of the BRC member.

6. The rollable display of claim 4 , wherein the roller assembly includes a support member having a fixed curvature,
wherein the BRC member is bent to have the fixed curvature along the width of the BRC member while passing through the support member.

7. The rollable display of claim 1 , wherein the roller assembly includes a sub-roller opposite to the roller, the BRC member is positioned between the roller and the sub-roller, and the sub-roller rotates in conjunction with the rolling and unrolling of the BRC member,
wherein a rotation axis of the sub-roller is parallel to a rotation axis of the roller.

8. The rollable display of claim 1 , wherein the flexible display panel includes a portion protruding outward beyond an edge of the guide shaft along the direction of the central axis,
wherein the panel guide includes a guide roller in contact with the protruding portion of the flexible display panel, and
wherein a rotation axis of the guide roller is parallel to the central axis.

9. The rollable display of claim 1 , wherein the panel guide further includes bearings provided at respective ends of the guide shaft,
wherein the bearings are movably coupled to the guide rail along the spiral trajectory of the guide rail.

10. The rollable display of claim 1 , further comprising a base member to which the roller assembly and the panel guide are fixed.

11. A rollable display comprising:
a flexible display panel;
at least one Bistable Reeled Composite (BRC) member having a first end mechanically coupled to a first edge of the flexible display panel, the BRC member being rollable along a longitudinal direction between the first end and a second end opposite the first end, the BRC member having a bend along a width of the BRC member in an unrolled state and being unbent along the width in a rolled state;
a roller assembly including a roller mechanically coupled to the second end of the BRC member, and a motor for rotating the roller; and
a panel guide connected to a second edge of the flexible display panel,
wherein the first edge of the flexible display panel descends with respect to the panel guide while rolling the BRC member onto the roller when the motor is rotated in a first direction and ascends with respect to the panel guide while unrolling the BRC member from the roller when the motor is rotated in a second direction opposite to the first direction,
wherein the flexible display panel is rolled onto the panel guide while descending and is unrolled from the panel guide while ascending, and
wherein the BRC member has a length between the roller assembly and the first edge of the flexible display panel, the length of the BRC member decreases while the first edge of the flexible display panel descends with respect to the panel guide, and the length of the BRC member increases while the first edge of the flexible display panel ascends with respect to the panel guide, and
wherein the panel guide includes:
a guide rail that defines a spiral trajectory; and
a guide shaft having a shape extending in a direction of a central axis, the flexible display panel being rollable with respect to the central axis, the guide shaft movably fastened to the guide rail,
wherein the guide shaft is coupled to the second edge of the flexible display panel, and guides the flexible display panel along the spiral trajectory of the guide rail.

12. The rollable display of claim 11 , comprising a plurality of BRC members, wherein at least one of the BRC members is spaced apart from at least one other of the BRC members.

13. The rollable display of claim 12 , wherein each of the plurality of the BRC members is driven by the motor.

14. The rollable display of claim 11 , wherein the second end of the BRC member is coupled to the roller in an unbent state along the width of the BRC member.

15. The rollable display of claim 14 , further comprising an upper frame attached to the first edge of the flexible display panel,
wherein the upper frame mechanically couples the first end of the BRC member to the first edge of the flexible display panel, with the BRC member being in a bent state along the width of the BRC member.

16. The rollable display of claim 14 , wherein the roller assembly includes a support member having a fixed curvature,
wherein the BRC member is bent to have the fixed curvature along the width of the BRC member while passing through the support member.

17. The rollable display of claim 11 , wherein the roller assembly includes a sub-roller opposite to the roller, the BRC member is positioned between the roller and the sub-roller, and the roller rotates in conjunction with the rolling and

Assignees

• Lg Display Co Ltd

Inventors

• Kang Chounsung
• Park Geunchang
• PARK Jungkyu

Classifications

• H04M1/0268

  including a flexible display panel · CPC title

• G06F1/1679 Primary

  for locking or maintaining the movable parts of the enclosure in a fixed position, e.g. latching mechanism at the edge of the display in a laptop or for the screen protective cover of a PDA (G06F1/1681 takes precedence) · CPC title

• G06F1/1601 Primary

  Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays (constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64) · CPC title

• G09F9/301 Primary

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

• G06F1/1652

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