Granted Patent B2

US 12,211,403 · App. 17/905,159 · Granted Jan 28, 2025

Inventors: Jonggil Pyo (Seoul, KR); Kwaneun Jin (Seoul, KR); Jaeyong Kim (Seoul, KR)

Assignee: LG ELECTRONICS INC.

G09F9/301

Abstract

Claims (55)

1. A display device comprising:

a flexible display panel;

a panel roller extending along a length direction, around or from which the flexible display panel is configured to be wound or unwound;

a driving gear located at a side of the panel roller, and configured to rotate together with the panel roller;

a motor located inside the panel roller, and configured to provide power to the driving gear;

a motor gear fixed to a rotation shaft of the motor;

at least one planetary gear engaged with the motor gear;

a first pulley coupled to the driving gear, and configured to rotate together with the panel roller;

a second pulley spaced apart from the first pulley;

a belt connecting the first pulley and the second pulley; and

a bar fixed to the belt between the first pulley and the second pulley,

wherein a distal end of the flexible display panel is fixed to the bar.

2. The display device of claim 1 , further comprising a tension pulley configured to pull the belt in a direction intersecting with a direction in which the bar moves.

3. The display device of claim 2 , further comprising:

a bottom frame on which the panel roller is rotatably mounted;

a top frame which is parallel to the bottom frame, and spaced apart from the bottom frame; and

a vertical frame connecting the bottom frame and the top frame,

wherein the first pulley is installed on the bottom frame,

wherein the second pulley is installed on the top frame, and

wherein the belt is installed on the vertical frame.

4. A display device comprising:

a flexible display panel;

a panel roller extending along a length direction, around or from which the flexible display panel is configured to be wound or unwound;

a bottom frame in which the panel roller is rotatably mounted;

a motor mounted in the bottom frame;

a first vertical frame extending along a direction intersecting with the length direction of the panel roller, and fixed to the bottom frame;

a first lead screw which is parallel to the first vertical frame, and rotatably coupled to the bottom frame;

a first screw nut into which the first lead screw is inserted, wherein the first screw nut is engaged with a thread of the first lead screw;

a worm gear configured to rotate the first lead screw;

a first pulley configured to provide a rotational force to the worm gear;

a second pulley connected to a rotation shaft of the motor;

a belt connecting the first pulley and the second pulley;

a first slider coupled to the first screw nut, and configured to move along a length direction of the first lead screw while being in contact with the first vertical frame when the first lead screw rotates; and

a bar to which a distal end of the flexible display panel is fixed, wherein the bar is coupled to the first slider.

5. The display device of claim 4 , further comprising:

an indicator configured to rotate together with the second pulley; and

a sensor configured to detect a rotation of the indicator.

6. A display device comprising:

a flexible display panel;

a panel roller extending along a length direction, around or from which the flexible display panel is configured to be wound or unwound;

a bottom frame in which the panel roller is rotatably mounted;

a motor mounted in the bottom frame;

a first vertical frame extending along a direction intersecting with the length direction of the panel roller, and fixed to the bottom frame;

a first lead screw which is parallel to the first vertical frame, and rotatably coupled to the bottom frame;

a first slider configured to move along a length direction of the first lead screw when the first lead screw rotates;

a bar to which a distal end of the flexible display panel is fixed, wherein the bar is coupled to the first slider;

a second vertical frame which is parallel to the first vertical frame, and fixed to the bottom frame;

a second lead screw which is parallel to the second vertical frame, and rotatably coupled to the bottom frame; and

a second slider configured to move along a length direction of the second lead screw when the second lead screw rotates,

wherein the bar has a first side fixed to the first slider and a second side fixed to the second slider.

7. The display device of claim 6 , further comprising a second screw nut to which the second lead screw is inserted, wherein the second screw nut is engaged with a thread of the second lead screw,

wherein the second slider is coupled to the second screw nut, and configured to move along a length direction of the second lead screw while being in contact with the second vertical frame.

8. The display device of claim 7 , further comprising:

a worm gear configured to rotate the second vertical frame; and

a transmission shaft which is parallel to the panel roller, wherein the transmission shaft has a first side fixed to the first pulley, and a second side configured to rotate the worm gear.

Assignments (1)

Continuity (1)

References Cited (10)