Display device

Patent metadata

Field	Value
Publication number	US-11921545-B2
Application number	US-202016963509-A
Country	US
Kind code	B2
Filing date	Jun 24, 2020
Priority date	May 26, 2020
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

A display device is provided and includes: a case assembly, a first supporting component, a second supporting component disposed to be slidable relative to the first supporting component, and a transmission mechanism connected to the second supporting component; and a flexible display screen laying on one side of the first supporting component and one side of the second supporting component, a first end of the flexible display screen connected to one end of the second supporting component far away from the first supporting component, and a second end of the flexible display screen connected to the transmission mechanism.

First claim

What is claimed is:

1. A display device, comprising:
a case assembly, a first supporting component disposed to be fixed to the case assembly, a second supporting component disposed to be slidable relative to the first supporting component, and a transmission mechanism disposed in the case assembly and connected to the second supporting component; and
a flexible display screen laying on one side of the first supporting component and one side of the second supporting component, a first end of the flexible display screen connected to one end of the second supporting component far away from the first supporting component, and a second end of the flexible display screen connected to the transmission mechanism;
wherein when the first supporting component slides relative to the second supporting component, the two ends of the flexible display screen move, due to effect of the transmission mechanism, with the same distance in the same time,
wherein the case assembly comprises a first case body and a second case body which are disposed opposite to each other, the first case body is fixed to and connected to the first supporting component, and the second case body is fixed to and connected to the second supporting component;
the flexible display screen comprises a first part disposed on a surface of the case assembly and a second part disposed in the case assembly;
the transmission mechanism comprises at least gear set and at least one screw which are positioned on the first case body and a rack set which is positioned on the second case body, the gear set engages with the rack set, and the screw and the gear set rotate coaxially;
when the display device implements a small-screen display, the first part of the flexible display screen is in a display state and the second part of the flexible display screen is in a non-display state; and
when the display device implements a large-screen display, the rack set on the second case body drives, via the gear set, the screw to rotate, so that the second case body moves in a direction far away from the first case body, the second part of the flexible display screen moves from inside of the case assembly to the surface of the case assembly, and the first part and the second part of the flexible display screen are in the display state.

2. The display device of claim 1 , wherein the rack set comprises at least one first rack, and the first rack is disposed close to a first side surface or/and a second side surface of the second case body; and
when the display device implements the large-screen display, the first rack drives, via the gear set, the screw to rotate, so that the second case body moves in the direction far away from the first case body.

3. The display device of claim 2 , wherein the gear set at least comprises:
at least one first gear, the first gear engaging with the first rack, and the first gear positioned at one side of the first rack far away from the flexible display screen;
at least one second gear, and the first gear and the second gear rotating coaxially;
at least one first roller, and the first roller penetrating the first gear and the second gear and fixed to and connected to the first gear and the second gear; and
at least one third gear, the third gear engaging with the second gear, and the third gear and the screw rotating coaxially;
when the display device implements the large-screen display, the first rack transmits, via the first gear, the second gear, the third gear, and the first roller, a driving force to the screw, so that the second case body moves via the screw in the direction far away from the first case body.

4. The display device of claim 3 , wherein the gear set further comprises:
at least two first bearing sets, each of the first bearing sets comprising two first bearings, the first bearings positioned at two sides of the first roller, the first bearings fixed to and connected to the first roller, and the first gear, the second gear, and the first roller rotating in the first bearings; and
at least two gear stands, each of the gear stands corresponding to one of the first bearing sets, the gear stands fixed to and connected to a first side case or/and a second side case of the first case body, and the first case body and the second case body make the gear stands have a first opening toward a front case of the second case body.

5. The display device of claim 3 , wherein the first gear is a spur gear, and the second gear and the third gear are bevel gears; and
wherein when a pitch diameter of the first gear is A, a pitch diameter of the second gear is B, a pitch diameter of the third gear is C, and a screw pitch of the screw is L, a relationship of the first gear, the second gear, the third gear, and the screw is B*L=π*A*C.

6. The display device of claim 3 , wherein the display device further comprises:
a sliding block, and the sliding block slidably connected to the screw; and
a second roller positioned at one side of the first case body far away from the gear set, and the second part of the flexible display screen extending to inside of the first case body along the second roller and fixed to and connected to the sliding block;
wherein when the display device implements the large-screen display, the external driving force drives the second case body to move in the direction far away from the first case body and the screw drives the sliding block to move in a direction far away from the first gear, so that the second part of the flexible display screen moves from the inside of the first case body to a surface of the first case body; and
when the display device implements the small-screen display, the external driving force drives the second case body to move in a direction close to the first case body, the screw drives the sliding block to move in a direction close to the first gear, and the flexible display screen rolls along the second roller, so that the second part of the flexible display screen moves from the surface of the first case body to the inside of the first case body and extends toward a direction of the first roller.

7. The display device of claim 6 , wherein the flexible display screen comprises a display panel, a tensile layer, and an adhesive layer positioned between the display panel and the tensile layer, a first terminal of the tensile layer is fixed to and connected to the second case body, and a second terminal of the tensile layer is fixed to and connected to the sliding block.

8. The display device of claim 7 , wherein an area of the display panel is smaller than an area of the tensile layer.

9. The display device of claim 8 , wherein the flexible display screen further comprises a third part fixed to and connected to the sliding block, the third part of the flexible display screen corresponds to the tensile layer, and the third part of the flexible display screen is a non-functional area of the display device.

10. The display device of claim 7 , wherein a material of the tensile layer is a tensible material including a sus metallic material or an amorphous material.

11. The display device of claim 7 , wherein the adhesive layer is a viscous layer including an optical adhesive.

12. The display device of claim 4 , wherein the first case body comprises a rear case and a first side case and a second side case which are positioned at two sides of the rear case, the second case body comprises a front case, the first supporting component is fixed to and connected to the rear case, the first side case, and the second side case, and the second supporting component is fixed to and connected to the front case;
the first supporting component comprises a first supporting plate, an

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Feng Zikang

Classifications

• G06F1/1652 Primary

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

• H04M1/0268 Primary

  including a flexible display panel · CPC title

• H04M1/0237 Primary

  Sliding mechanism with one degree of freedom · CPC title

• G09F9/301

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