CN110504296B

CN110504296B - Preparation method of flexible display screen and flexible display screen

Info

Publication number: CN110504296B
Application number: CN201910842674.9A
Authority: CN
Inventors: 肖福亮
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-09-14
Anticipated expiration: 2039-09-06
Also published as: CN110504296A

Abstract

The application relates to a preparation method of a flexible display screen and the flexible display screen. And forming a cutting seam for cutting off the flexible screen body layer by cutting the flexible screen body layer, and driving the end part of the flexible screen body layer close to the cutting seam by the rolling device to separate the flexible screen body layer from the substrate to obtain the flexible display screen. The preparation method of the flexible display screen is simple and quick, and avoids the use of a laser technology to separate the substrate and the flexible screen body layer, thereby ensuring the quality of the flexible display screen.

Description

Preparation method of flexible display screen and flexible display screen

Technical Field

The application relates to the field of display, in particular to a flexible display screen and a preparation method thereof.

Background

In the process of manufacturing an Organic Light Emitting Diode (OLED) flexible screen, the screen and a substrate are generally required to be separated. In the prior art, a Laser Lift Off (LLO) technology is mostly adopted to separate a substrate and a screen body. However, the laser light may affect the quality of the screen during the separation process, thereby affecting the display of the screen.

Disclosure of Invention

In view of the above, it is necessary to provide a method for manufacturing a flexible display panel and a flexible display panel.

A preparation method of a flexible display screen comprises the following steps:

s10, providing a flexible display screen prefabricated component, wherein the flexible display screen prefabricated component comprises a substrate and a flexible screen layer attached to the substrate;

s20, cutting the flexible screen body layer to form a cutting seam, wherein the cutting seam penetrates through the flexible screen body layer;

s30, providing a rolling device, enabling the rolling device to be attached to the surface of the flexible screen body layer close to the cutting seam, and rolling to enable the part, close to the cutting seam, of the flexible screen body layer to be separated from the substrate;

and S40, continuously rolling the rolling device to separate the flexible screen layer from the substrate from the position of the cutting seam, thereby obtaining the flexible display screen.

In one embodiment, the flexible display screen prefabricating assembly further comprises a release layer, the release layer is arranged between the substrate and the flexible screen body layer in a laminating mode, the cutting seam extends from the flexible screen body layer to the release layer, in S30, the rolling device is rolled to enable the part, close to the cutting seam, of the flexible screen body layer to be separated from the release layer.

In one embodiment, in S20, one end of the release layer is a bevel, and the cutting seam extends from the surface of the flexible screen layer to the bevel.

In one embodiment, one end of the flexible display screen prefabricated component is a fixed end, the inclined plane inclines towards a direction deviating from the fixed end, and in S30, the rolling device is controlled to move on the surface of the flexible screen body layer from the cutting seam towards a direction far away from the fixed end, so that the part of the flexible screen body layer close to the cutting seam is separated from the substrate.

In one embodiment, in S30, before controlling the rolling device to move on the surface of the flexible screen layer from the cut slit toward a direction away from the fixed end, so as to separate the portion of the flexible screen layer close to the cut slit from the substrate, the method further includes:

and blowing gas into the cutting seam.

In one embodiment, in S30, a projection of the cutting slit in the vertical direction of the substrate coincides with a projection of the inclined plane in the vertical direction of the substrate.

In one embodiment, one end of the flexible display screen prefabricated component is a fixed end, the inclined surface is inclined towards the fixed end, the cutting seam extends to the substrate along the inclined surface, and in S30, the rolling device is controlled to move on the surface of the flexible screen body layer from the cutting seam towards a direction away from the fixed end, so that a part of the flexible screen body layer close to the cutting seam is separated from the substrate.

In one embodiment, in S30, the rolling device is a roller, an adhesive pad is attached to a surface of the roller, and when the rolling device is rolled, the adhesive pad drives a portion of the flexible screen layer close to the cutting seam to separate from the substrate.

In one embodiment, the cutting slits are formed by laser cutting or knife milling cutting in the S20.

A flexible display screen is manufactured by the manufacturing method of the flexible display screen.

According to the preparation method of the flexible display screen, the flexible screen body layer is cut into the cutting seams for cutting off the flexible screen body layer, the rolling device drives the end portions, close to the cutting seams, of the flexible screen body layer to enable the flexible screen body layer to be separated from the substrate, and then the flexible display screen is obtained. The preparation method of the flexible display screen is simple and quick, and avoids the use of a laser technology to separate the substrate and the flexible screen body layer, thereby ensuring the quality of the flexible display screen.

Drawings

Fig. 1 is a flowchart of a method for manufacturing a flexible display screen according to an embodiment of the present disclosure;

fig. 2 is a structural diagram of a flexible display screen prefabricated component provided in an embodiment of the present application;

FIG. 3 is a schematic view of a blowing process of a flexible display screen prefabricated component provided in an embodiment of the present application;

fig. 4 is a structural diagram of a flexible display screen prefabricated component provided in an embodiment of the present application;

fig. 5 is a schematic view illustrating a flexible display screen prefabricated component provided in an embodiment of the present application.

Description of reference numerals:

flexible display screen prefabricated component 10

Substrate 110

Release layer 120

Bevel 122

Screen layer 130

Cutting slit 142

Rolling device 210

Adhesive pad 212

Fixed end 300

Platform 220

Pressing device 230

Vacuum adsorption device 240

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the following description of the method for manufacturing a flexible display panel and the flexible display panel according to the present application will be made in detail by using embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, an embodiment of the present application provides a method for manufacturing a flexible display screen. The preparation method comprises the following steps:

s10, providing a flexible display screen prefabricated component 10, where the flexible display screen prefabricated component 10 includes a substrate 110 and a flexible screen layer 130 attached to the substrate 110;

s20, cutting the flexible screen layer 130 to form a cutting seam 142, wherein the cutting seam 142 penetrates through the flexible screen layer 130;

s30, providing a rolling device 210, attaching the rolling device 210 to the surface of the flexible screen layer 130 located at the cut seam 142, and rolling the rolling device 210 to separate the portion of the flexible screen layer 130 close to the cut seam 142 from the substrate 110;

s40, the rolling device 210 is continuously rolled to separate the flexible screen layer 130 from the substrate 110 by the position of the cutting slit 142, thereby obtaining the flexible display screen.

In step S10, the substrate 110 may be a glass substrate 110. After the flexible panel layer 130 is fabricated on the substrate 110, the flexible panel layer 130 needs to be removed from the substrate 110 and further processed into a flexible display panel. The flexible screen layer 130 may include a flexible substrate, a driving circuit layer, and a light emitting layer and an encapsulation layer. The driving circuit layer may be formed on a surface of the flexible substrate. The light emitting layer may be formed on a surface of the driving circuit layer remote from the substrate. The surface of the light-emitting layer can be covered with an encapsulation layer. The flexible substrate may be transparent polyimide or non-transparent polyimide.

In step S20, the flexible screen layer 130 may be cut by a laser cutting process or a knife die cutting process. The cutting slit 142 may have a certain width. In one embodiment, the width of the cutting slit 142 may be in millimeters. The cut seam 142 extends through the flexible screen layer 130, such that the cut seam 142 severs the flexible screen layer 130. The cut portions of the flexible screen layer 130 may be used as a preform for the flexible display screen. The flexible display screen can be manufactured through the prefabricated member.

In step S30, the rolling device 210 may be a structure or an element having an arc-shaped surface. The rolling device 210 is in contact with the surface of the flexible screen layer 130, and the rolling device 210 is adjacent to the cut seam 142. When the rolling device 210 moves, the adhesion force between the rolling device 210 and the flexible screen layer 130 may cause the end portion of the flexible screen layer 130 close to the cutting slit 142 to tilt, and the flexible screen layer 130 is gradually peeled off from the substrate 110 along with the movement of the rolling device 210. In one embodiment, the rolling device 210 may have an arcuate surface. The arcuate surface may be in contact with a surface of the flexible screen layer 130. When the curved surface is rolled, the adhesion of the flexible screen layer 130 to the curved surface is greater than the adhesion between the flexible screen layer 130 and the substrate 110. The flexible screen layer 130 is rolled up by the curved surface.

In step S40, the rolling device 210 rolls to separate the end of the flexible screen layer 130 near the cutting slit 142 from the glass substrate 110, and then continues to roll. The contact area of the flexible screen layer 130 with the substrate 110 is gradually reduced until the flexible screen layer 130 is completely peeled off from the substrate 110. It is understood that the flexible screen layer 130 detached from the substrate 110 may be a preform constituting a flexible display screen. The flexible display screen can be manufactured by further processing the prefabricated member.

In the embodiment of the present application, the flexible display panel assembly 10 is first provided, and then the flexible panel layer 130 is cut to form the cut seam 142. The cut seam 142 divides the flexible screen layer 130 into two parts, one of which is a preform of the flexible display screen. Then, the rolling device 210 is attached to the surface of the flexible panel layer 130 located at the cut slit 142, and the rolling device 210 is rolled to start separation of one end of the portion of the flexible display panel as a preform from the substrate 110. Finally, the flexible screen layer 130 as a prefabricated member is separated from the substrate 110 by the position of the cutting slit 142, thereby obtaining a flexible display screen.

According to the preparation method of the flexible display screen provided by the embodiment of the application, the cutting seam 142 for cutting off the flexible screen layer 130 is formed by cutting the flexible screen layer 130, and the rolling device 210 drives the end part of the flexible screen layer 130 close to the cutting seam 142 to separate the flexible screen layer 130 from the substrate 110, so that the flexible display screen is obtained. The preparation method of the flexible display screen is simple and quick, and the substrate 110 and the flexible screen body layer 130 are prevented from being separated by using a laser technology, so that the quality of the flexible display screen is ensured.

In one embodiment, in step S20, the flexible display screen pre-assembly 10 further includes a release layer 120. The release layer 120 is stacked between the substrate 110 and the flexible panel layer 130. The dicing seams 142 extend from the flexible screen layer 130 to the release layer 120. The dicing lines 142 prevent the release layer 120 from being cut off, and prevent the contact area between the release layer 120 and the substrate 110 from being reduced. In step S30, the rolling device 210 is rolled to separate the portion of the flexible screen layer 130 near the cut seam 142 from the release layer 120.

The release layer 120 may be organic. For example, the material of the release layer 120 may be a polyimide-based material or a silicon-based compound. The material of the release layer 120 may also be inorganic. For example, the release layer 120 may be silicon, metal oxide, or silicon oxynitride. An organic solution may be coated on the surface of the substrate 110, and the release layer 120 may be formed after the organic solution is cured. The release layer 120 may facilitate separation of the substrate 110 and the flexible screen layer 13. Two opposite surfaces of the release layer 120 may be directly attached to the substrate 110 and the flexible screen layer 130. The adhesive force between the release layer 120 and the substrate 110 is greater than the adhesive force between the release layer 120 and the flexible screen layer 130. Therefore, when the rolling device 210 drives the flexible screen layer 130 to separate from the substrate 110, the flexible screen layer 130 can be separated from the release layer 120, and the release layer 120 and the substrate 110 are kept as a whole.

It is understood that, in step S40, the flexible screen layer 130 is separated from the release layer 120 by the position of the cutting seam 142, thereby obtaining the flexible display screen. Of course, in step S40, the flexible display panel layer 130 and the release layer 120 may also be separated from the substrate 110 by the position of the cutting seam 142, so as to obtain the flexible display panel, i.e. the flexible display panel 130 and the release layer 120 are still kept as a whole.

Referring to fig. 2, in an embodiment, in step S20, one end of the release layer 120 is a slope 122. Cut seam 142 extends from the surface of screen layer 130 to bevel 122. When the release layer 120 is formed on the surface of the substrate 110, the release layer 120 may be patterned by a photolithography process to form the slope 122. The slope 122 may change a contact area between the flexible screen layer 130 and the release layer 120, and thus may change an amount of adhesion between the flexible screen layer 130 and the release layer 120. The slope 122 may also change the contact area of the flexible screen layer 130 with the substrate 110, and thus may change the amount of adhesion of the flexible screen layer 130 to the substrate 110. The separation difficulty of the flexible screen layer 130 from the release layer 120 can be reduced by the inclined surface 122.

In one embodiment, one end of the flexible display screen prefabricated assembly 10 is a fixed end 300. The fixing end 300 may be fixed by a fixing device, thereby fixing the flexible display panel module 10. The inclined surface 122 is inclined in a direction away from the fixed end 300. That is, the height of the side of the inclined surface 122 close to the fixed end 300 is less than the height of the side of the inclined surface 122 away from the fixed end 300. That is, in the clockwise direction, the inclined surface 122 forms an obtuse angle with the base plate 110.

In step S30, the rolling device 210 is controlled to move on the surface of the flexible screen layer 130 away from the fixed end 300 by the cutting slit 142, so that the part of the flexible screen layer 130 close to the cutting slit 142 is separated from the substrate 110. When the inclined surface 122 is inclined toward a direction away from the fixing end 300, a contact area between the release layer 120 and the substrate 110 is larger than a contact area between the flexible screen layer 130 and the release layer 120. Therefore, the adhesion force between the substrate 110 and the release layer 120 is relatively greater, and when the rolling device 210 is moved on the surface of the flexible screen layer 130 by the cutting seam 142 toward the direction away from the fixed end 300, the substrate 110 can be prevented from being separated from the release layer 120, thereby facilitating the separation of the flexible screen layer 130 from the release layer 120.

Referring to fig. 3, in one embodiment, in step S30, before controlling the rolling device 210 to move the surface of the flexible screen layer 130 away from the fixed end 300 from the cutting slits 142, the method further includes blowing gas into the cutting slits 142 before separating the portion of the flexible screen layer 130 close to the cutting slits 142 from the substrate 110. By blowing gas into the cutting slit 142, pressure can be generated on the slope 122, that is, vertically downward pressure is generated on the release layer 120. Therefore, the difficulty of the rolling device 210 driving the flexible screen layer 130 to separate from the release layer 120 can be reduced, and the working efficiency can be improved.

In one embodiment, in step S30, the projection of the cutting slit 142 in the vertical direction of the substrate 110 coincides with the projection of the inclined plane 122 in the vertical direction of the substrate 110. I.e., opposite sidewalls of the cut seam 142 extend to both edges of the bevel 122. By making the projection of the cutting slit 142 in the vertical direction of the substrate 110 coincide with the projection of the inclined plane 122 in the vertical direction of the substrate 110, the area of the inclined plane 122 can be fully utilized, i.e., the contact area between the gas and the inclined plane 122 is increased, so that the adhesion force between the release layer 120 and the substrate 110 is increased, and the difficulty in separating the release layer 120 from the flexible screen layer 130 is further reduced.

Referring to fig. 4, in one embodiment, one end of the flexible display screen prefabricated component 10 is a fixed end 300. The inclined surface 122 is inclined toward the fixed end 300, i.e., the height of the inclined surface 122 on the side close to the fixed end 300 is greater than the height of the inclined surface 122 on the side away from the fixed end 300. That is, in the counterclockwise direction, the inclined surface 122 forms an acute angle with the substrate 110. The dicing lines 142 extend along the slopes 122 to the substrate 110. That is, one sidewall of the cutting slit 142 is in a plane with the surface of the bevel 122.

In step S30, the rolling device 210 is controlled to move on the surface of the flexible screen layer 130 away from the fixed end 300 by the cutting slit 142, so that the part of the flexible screen layer 130 close to the cutting slit 142 is separated from the substrate 110. Since the cutting slit 142 extends along the inclined surface 122 to the substrate 110, the side of the flexible screen layer 130 close to the fixed end 300 is also the inclined surface 122. And, the contact transition part of the flexible screen layer 130 and the release layer 120 is also the inclined plane 122. Because the inclined plane 122 inclines towards the fixed end 300, when the rolling device 210 is controlled to move on the surface of the flexible screen layer 130 from the cutting seam 142 towards the direction far away from the fixed end 300, the rolling device 210 can more easily drive the flexible screen layer 130 to be separated from the substrate 110 or the flexible screen layer 130 and the release layer 120 to be separated from the substrate 110, and the working difficulty is reduced.

In one embodiment, in step S30, the rolling device 210 is a roller. The surface of the roller is adhered with an adhesive pad 212. When the rolling device 210 is rolled, the adhesive pad 212 drives the portion of the flexible screen layer 130 close to the cutting slit 142 to separate from the substrate 110. The diameter of the roller may be 500mm to 700 mm. In one embodiment, the diameter of the drum is 600 mm. When the flexible screen layer 130 is rolled up by the drum, the flexible screen layer 130 may cover a portion of the surface of the roll. The adhesive pads 212 may function to adhere the flexible screen layer 130, thereby facilitating separation of the flexible screen layer 130 from the substrate 110. After the flexible screen layer 130 is rolled up, a support layer may be attached to the surface of the flexible screen layer 130 away from the roller, and then the flexible screen layer 130 is removed through the support layer.

Referring to fig. 5, in one embodiment, the fixed end 300 of the flexible shield layer 130 is fixed by the platform 220 and the clamping device. In operation, the flexible display screen precursor assembly 10 is first placed on the surface of the platform 220 and between the platform 220 and the pressing device 230. When peeling the flexible screen layer 130, the pressing device 230 is controlled to press the fixed end 300 of the flexible screen layer 130 in a vertical direction, and then the flexible screen layer 130 is separated from the substrate 110 by the rolling device 210. The stage 220 may further include a vacuum adsorption device 240, and the substrate 110 is adsorbed on the surface of the stage 220 by the vacuum adsorption device 240.

The embodiment of the application also provides a flexible display screen. The flexible display screen is manufactured by the manufacturing method of the flexible display screen in the embodiment. The flexible display screen can be used for electronic equipment such as a mobile terminal, a tablet computer and a sports bracelet.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present patent. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A preparation method of a flexible display screen is characterized by comprising the following steps:

s10, providing a flexible display screen prefabricated component (10), wherein the flexible display screen prefabricated component (10) comprises a substrate (110) and a flexible screen body layer (130) attached to the substrate (110);

s20, cutting the flexible screen layer (130) to form a cut seam (142), the cut seam (142) penetrating the flexible screen layer (130);

s30, providing a rolling device (210), enabling the rolling device (210) to be attached to the surface of the flexible screen layer (130) close to the cutting seam (142), and rolling the rolling device (210) to enable the part, close to the cutting seam (142), of the flexible screen layer (130) to be separated from the substrate (110);

s40, continuously rolling the rolling device (210) to separate the flexible screen layer (130) from the substrate (110) from the position of the cutting seam (142), so as to obtain the flexible display screen;

the flexible display screen prefabrication assembly (10) further comprises a release layer (120), the release layer (120) is arranged between the substrate (110) and the flexible screen layer (130) in a stacking mode, the cutting seam (142) extends from the flexible screen layer (130) to the release layer (120), in S30, the rolling device (210) is rolled to enable the part, close to the cutting seam (142), of the flexible screen layer (130) to be separated from the release layer (120);

in the S20, one end of the release layer (120) is a bevel (122), and the cut seam (142) extends from the surface of the flexible screen layer (130) to the bevel (122);

one end of the flexible display screen prefabricated component (10) is a fixed end (300), the inclined plane (122) faces away from the direction inclination of the fixed end (300), and in the step S30, the rolling device (210) is controlled to move on the surface of the flexible screen layer (130) towards the direction far away from the fixed end (300) through the cutting seam (142), so that the part, close to the cutting seam (142), of the flexible screen layer (130) is separated from the substrate (110).

2. The method of claim 1, wherein in the step S30, before the step of controlling the rolling device (210) to move the surface of the flexible screen layer (130) from the cutting slit (142) to a direction away from the fixed end (300) so as to separate the portion of the flexible screen layer (130) close to the cutting slit (142) from the substrate (110):

blowing gas into the cutting slit (142).

3. The method of manufacturing a flexible display panel according to claim 1, wherein in S30, a projection of the cut seam (142) in a vertical direction of the substrate (110) coincides with a projection of the inclined plane (122) in the vertical direction of the substrate (110).

4. The method of claim 1, wherein in the step S30, the rolling device (210) is a roller, an adhesive pad (212) is attached to a surface of the roller, and when the rolling device (210) is rolled, the adhesive pad (212) drives a portion of the flexible screen layer (130) close to the cutting seam (142) to separate from the substrate (110).

5. The method of manufacturing a flexible display panel according to claim 1, wherein in S20, the cutting slit (142) is formed by laser cutting or knife milling cutting.

6. The method for manufacturing a flexible display screen according to claim 1, wherein the width of the cutting seam is in mm.

7. The method of manufacturing a flexible display screen according to claim 1, wherein the rolling means has an arc-shaped surface.

8. The method for manufacturing the flexible display screen according to claim 1, wherein the material of the release layer is a polyimide material or a silicon-based compound.

9. A preparation method of a flexible display screen is characterized by comprising the following steps:

one end of the flexible display screen prefabricated component (10) is a fixed end (300), the inclined surface (122) faces the fixed end (300) and inclines, the cutting seam (142) extends to the substrate (110) along the inclined surface (122), in S30, the rolling device (210) is controlled to move on the surface of the flexible screen layer (130) towards the direction far away from the fixed end (300) by the cutting seam (142), so that the part of the flexible screen layer (130) close to the cutting seam (142) is separated from the substrate (110).

10. A flexible display panel, characterized by being produced by the method for producing a flexible display panel according to any one of claims 1 to 9.