CN111933039A - Curling device and flexible display device - Google Patents

Abstract

The application discloses a crimping device and a flexible display device, comprising a crimping shaft, a motor and a cylinder connected to the crimping shaft are arranged in the crimping shaft, an air passage is also arranged in the crimping shaft, and one end of the air passage is connected to the exhaust port of the cylinder; , the foam is arranged on the outer surface of the crimping shaft, an inflatable area is also formed between the foam and the crimping shaft, and the other end of the airway is connected to the inflatable area. According to the technical solutions provided by the embodiments of the present application, by providing a curling device, the curling device is an inflatable structure, and when the display device is rolled onto the curling device, the curling device generates a longitudinal direction perpendicular to the radial direction through inflation. Squeeze force, so that the display device rolled on the curling device can also be subjected to the vertical squeezing force, reducing the risk of peeling of the optical adhesive in the display device during the dynamic curling process and in the curling state for a long time, and further It can also reduce the tightening force during crimping, reduce the tightening force, reduce the stress on the material in the display device, and reduce the amount of creep.

Description

Curling device and flexible display device

technical field

The present invention generally relates to the field of flexible displays, and in particular, to a curling device and a flexible display device.

Background technique

With the development of display technology, demands for different forms of display devices have been increasing, among which bendable or foldable display devices have been developed.

The flexible display device includes a flexible display panel, a touch screen, a polarizer, and a cover plate, etc. The connection between different parts is usually bonded by optical glue. When the flexible display device is curled, the curled product is due to the flexible display device itself. Due to the existence of thickness, during the curling process of the product, due to the accumulation of the number of turns during curling, the stress will accumulate, and the deformation requirements of the optical adhesive will increase. The end strain is the largest. The excessive stress on the optical adhesive may easily cause the problem of peeling of the optical adhesive.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a curling device and a flexible display device.

In a first aspect, a crimping device is provided, comprising: a crimping shaft, a motor and a cylinder connected to each other are arranged in the crimping shaft, an air passage is also arranged in the crimping shaft, and one end of the air passage is connected to the air cylinder of the cylinder. exhaust vent;

The foam is arranged on the outer surface of the crimping shaft, an inflatable area is formed between the foam and the crimping shaft, and the other end of the air passage is connected to the inflatable area.

In a second aspect, a flexible display device is provided, comprising the above-mentioned curling device on which a display device to be curled is mounted.

According to the technical solutions provided by the embodiments of the present application, by providing a curling device, the curling device is an inflatable structure, and when the display device is rolled onto the curling device, the curling device is inflated to generate a longitudinal direction perpendicular to the radial direction. Squeeze force, so that the display device rolled on the curling device can also be subjected to the longitudinal squeezing force, reducing the risk of peeling of the optical adhesive in the display device during the dynamic curling process and in the curling state for a long time, and further It can also reduce the tightening force during crimping, reduce the tightening force, reduce the stress on the material in the display device, and reduce the amount of creep.

Description of drawings

Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

1 is a schematic structural diagram of the crimping device in the present embodiment when it is not inflated;

2 is a schematic structural diagram of the curling device after inflation in the present embodiment;

FIG. 3 is a schematic structural diagram of the flexible display device in this embodiment;

FIG. 4 is a schematic structural diagram of the display device of FIG. 3 after being rolled.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Please refer to FIG. 1 and FIG. 2 , the present embodiment provides a crimping device, comprising: a crimping shaft 1 , a motor 2 and a cylinder 3 are connected in the crimping shaft 1 , an air passage 4 is also arranged in the crimping shaft 1 , and the air passage 4 One end is connected to the exhaust port of cylinder 3;

The foam 5 is arranged on the outer surface of the crimping shaft 1 , an inflatable area 6 is formed between the foam 5 and the crimping shaft 1 , and the other end of the air passage 4 is connected to the inflatable area 6 .

The curling device in this embodiment is an inflatable structure. When the display device is rolled onto the curling device, the curling device generates a longitudinal pressing force perpendicular to the radial direction through inflation, so that the display device curled on the curling device It can also be subjected to the longitudinal pressing force, reducing the risk of peeling off during the dynamic curling process of the optical adhesive in the display device and in the curling state for a long time. Tightening force, reducing the stress on the material in the display device and reducing the amount of creep.

Wherein, a motor 2 and a cylinder 3 are arranged in the winding shaft 1 of the curling device, and the cylinder 3 and the charging area 6 are connected through the air passage 4, and the motor 2 is activated to release the gas in the cylinder 3 into the charging area 6 or The gas in the inflatable area 6 is sucked back into the cylinder 3; the curling device in this embodiment is usually used to curl the flexible display screen to realize different forms of display, wherein, foam cotton is arranged outside the inflatable area, and the flexible display The screen performs certain buffering and bearing, and the material of the foam is not specifically limited, for example, polyurethane material, rubber material, pearl cotton material, etc. can be set for the foam.

Further, the outer surface of the foam 5 is also provided with a force sensor, and the force sensor is used to detect the tightening force applied to the foam 5 .

In this embodiment, a force sensor is also arranged on the outer surface of the foam, and the force sensor detects the winding force on the foam, which can further control the motor according to the winding force, and can accurately roll up the flexible display screen according to the winding force. The actual situation on the crimping device determines whether the inflation area on the crimping device is inflated or not. The type of the force sensor is not specifically limited. For example, the strain tube type force sensor and the diaphragm type force sensor can all achieve the above functions.

Further, a controller is included, and the controller is used to receive the signal of the force sensor, and control the start and stop of the motor according to the signal of the force sensor.

In this embodiment, a controller is provided, and the controller controls the start and stop of the motor according to the tightening force detected by the force sensor, so that the control of inflating and inhaling the inflatable area is more precise.

The above-mentioned control method is as follows: when the force sensor detects that the tightening force outside the foam is the set value, it sends a first signal to the controller, and when it is detected that the tightening force is not the set value but not zero, then send a second signal to the controller,

When the controller receives the first electrical signal from the force sensor, it controls the motor to start and releases the gas in the cylinder into the charging area; when the controller receives the second electrical signal from the force sensor, it controls the motor to stop and no longer sends the gas to the charging area. Inflate inside.

It also includes: when the force sensor detects that the tightening force on the outside of the foam is zero, it sends a third signal to the controller, and when the controller receives the third signal from the force sensor, it controls the motor to start, and sucks back the gas in the inflatable area into the cylinder until there is no gas in the inflatable area, that is, when the foam is in contact with the curling shaft.

In this embodiment, when the force sensor detects that the tightening force is 4-6N, the motor is controlled to start working to inflate the inflatable area.

Further, the thickness of the gas-filled region 6 is 50-100 μm when it is full of gas.

In this embodiment, the gap between the foam and the curling shaft is set to be 50-100 μm, which is the thickness of the inflatable area when it is full of air. This thickness can ensure that after the inflatable area is inflated, a radial extrusion force can be provided to the flexible display screen , and the thickness is not set too large, otherwise the extrusion force on the flexible display screen is too large, affecting the quality of the display screen, and the thickness is too small, and the radial extrusion force provided to the flexible display screen is not enough.

Further, the radius of the curling shaft 1 is 5-20 mm.

The reel in this embodiment preferably adopts a radius of 5-20 mm to roll a flexible display screen, such as a display device such as a mobile phone and a tablet.

This embodiment also provides a flexible display device, including the above-mentioned curling device, and the display screen 7 to be curled is installed on the curling device.

As shown in FIG. 3 , this embodiment provides a flexible display device, including a display screen and a curling device for curling, the display screen is mounted on the curling device, so that the curling device can be easily curled; the display screen provided in this embodiment The conventional structure is a cover plate, a polarizer, a touch layer, a display panel, or a cover plate, a touch layer, a polarizer, a display panel, or a cover plate, a polarizer, a touch display panel, etc., the above-mentioned display Each part of the display device is usually bonded to each other with optical glue, and there is a certain difference in thickness and rigidity between each film layer. When the display device is curled, the optical glue provides the function of stress relief and provides The function of split layer is realized, and the stress is the largest at the beginning and end of the screen curl,

Therefore, when the above-mentioned display screen is curled, the curling device in this embodiment is used for curling. During the process, the curling device is also inflated to provide radial extrusion force to the display screen, so that the optical adhesive in the display screen can be more closely connected with other film layers, reducing the risk of optical adhesive peeling and reducing The tension force of the curling module during curling can reduce the stress on the film layer, increase the service life of the display module, and reduce the creep of the membrane material due to long-term stress.

Further, the display surface of the display screen 7 is arranged close to or away from the curling device.

The display screen in this embodiment can be installed on the curling device in a forward or reverse direction, and the cover plate of the display panel can be connected with the curling device or the back plate of the display device can be connected with the curling device.

Further, the force sensor is arranged at the position where the display screen and the curling device are installed.

The experimental results show that when the display screen is curled, the stress at the beginning and end of the display screen is the largest. Therefore, it is preferable to set the force sensor at the position where the display screen and the curling device are installed, that is, the curling start end of the display screen. , the force sensor can sensitively feel the change of the winding tightness in the place where the stress is most concentrated, so as to inflate the curling device in time.

Further, the curling radius of the display screen 7 is 5mm-15mm.

The display screen in this embodiment is a flexible material, and the preferred curling radius is 5mm-15mm, so as to facilitate the curling of the display screen.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of its equivalent features. For example, a technical solution is formed by replacing the above-mentioned features with the technical features disclosed in this application (but not limited to) with similar functions.

Claims (9)

1. A crimping apparatus, comprising: the winding device comprises a winding shaft, wherein a motor and an air cylinder which are connected are arranged in the winding shaft, an air passage is also arranged in the winding shaft, and one end of the air passage is connected to an air outlet of the air cylinder;

the bubble is cotton, the bubble is cotton to be set up the curling axle surface, the bubble cotton with still be formed with the inflation zone between the curling axle, the air flue other end is connected to the inflation zone.

2. The crimping device of claim 1, wherein the foam outer surface is further provided with a force sensor for detecting a wind-up force applied to the foam.

3. The crimping device of claim 2, further comprising a controller configured to receive the signal from the force sensor and to control the start and stop of the motor based on the signal from the force sensor.

4. A crimping device according to any one of claims 1-3, wherein the thickness of the gas-filled zone is 50-100 μm when filled with gas.

5. A crimping device according to any one of claims 1-3, characterized in that the radius of the crimping shaft is 5-20 mm.

6. A flexible display device comprising a curling device according to any of claims 1-5, wherein the curling device is provided with a display screen to be curled.

7. The flexible display device of claim 6, wherein the display surface of the display screen is disposed proximate to or distal from the curling device.

8. The flexible display device of claim 6, wherein the force sensor is disposed at a location where the display screen is mounted with the curling device.

9. The flexible display device of claim 6, wherein the display screen has a curl radius of 5mm to 15 mm.

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