Granted Patent B2

US 12,619,282 · App. 17/689,888 · Granted May 5, 2026

Inventor: NhoHoon Myoung (Seoul, KR)

Assignee: LG Display Co., Ltd.

G06F1/1652G06F3/147G09F9/301H01B1/04H01B1/124

Abstract

Claims (32)

1 . A flexible organic light emitting diode display apparatus comprising:

a display panel having a display area where a plurality of pixels are disposed and a non-display area which is a periphery area of the display area,

each of the plurality of pixels having bottom emission type electroluminescence element including a first electrode, an electroluminescence layer on the first electrode, and a second electrode on the electroluminescence layer,

a driving unit disposed in the non-display area and having a gate driver configured to supply a scan signal and a data driver configured to supply a video signal,

a first roller fixed to one side of the display panel;

a second roller disposed on an upper side; and

a housing including a cavity, the display panel, the first roller, and the second roller are disposed in the cavity of the housing,

wherein the housing includes a first edge of the housing and a second edge of the housing that is opposite the first edge of the housing and spaced apart from the first edge of the housing such that an opening is formed between an end of the first edge of the housing and an end of the second edge of the housing, and

wherein the display panel moving through the opening includes a first side and a second side opposite to the first side,

wherein each of a curvature radius of the first edge of the housing which is in contact with the first side and a curvature radius of the second edge of the housing which is in contact with the second side is equal to or larger than a threshold curvature radius of the display panel,

wherein the first edge of the housing is in direct contact with the first side and the second edge of the housing is in direct contact with the second side that is opposite the first side while the first edge of the housing is in direct contact with the first side as the display panel extends out of the housing through the opening or extends into the housing through the opening, and

wherein all regions of the first edge of the housing that are in direct contact with the first side and all regions of the second edge of the housing that are in direct contact with the second side are curved surfaces opposing and symmetrical to each other.

2 . The flexible organic light emitting diode display apparatus of claim 1 ,

wherein the display panel is configured to have the threshold curvature radius, the display panel is configured to be rolled with a curvature equal to or larger than the threshold curvature radius without being damaged;

wherein the first roller is configured to roll-up the display panel, the first roller having a curvature radius equal to or larger than the threshold curvature radius; and

wherein the second roller has a curvature radius equal to or larger than the threshold curvature radius.

3 . The flexible organic light emitting diode display apparatus of claim 1 ,

wherein a sheet resistance of a surface of at least one of the first roller, the second roller, and the housing is less than or equal to a specific value so as to reduce a static electricity generated by friction of at least one of the first roller, the second roller, and the housing in contact with the display panel.

4 . The flexible organic light emitting diode display apparatus of claim 1 , wherein the housing is electrically grounded.

5 . The flexible organic light emitting diode display apparatus of claim 1 , wherein the display panel is electrically grounded.

6 . The flexible organic light emitting diode display apparatus of claim 1 , wherein the first roller is electrically grounded.

7 . The flexible organic light emitting diode display apparatus of claim 1 ,

wherein the first side of the display panel is in contact with a surface of the first roller, and the second side of the display panel is in contact with a surface of the second roller.

8 . The flexible organic light emitting diode display apparatus of claim 1 ,

wherein the display panel is configured to extend out of the housing through the opening along a first direction or extending into the housing through the opening along the first direction,

wherein the second roller is configured to move between a first position and a second position along a second direction that is different from the first direction such that a first distance in the second direction is between the second roller and the display panel at the first position and a second distance in the second direction is between the second roller and the display panel at the second position where the second distance is different from the first distance,

wherein the second roller is in contact with the display panel when the second roller is in the first position, and

wherein the second roller is not in contact with the display panel when the second roller is in the second position.

9 . The flexible organic light emitting diode display apparatus of claim 1 , wherein the driving unit is embedded in the first roller.

10 . The flexible organic light emitting diode display apparatus of claim 1 ,

wherein a cross sectional of the first roller is circle, and

wherein a cross sectional of the second roller is circle.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (67)