CN114248527A

CN114248527A - Curved screen and preparation method thereof

Info

Publication number: CN114248527A
Application number: CN202010997122.8A
Authority: CN
Inventors: 马浚原
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2022-03-29

Abstract

The disclosure relates to a curved screen and a preparation method thereof. The preparation method of the curved screen comprises the steps of manufacturing a curved screen body with more than two curved surfaces through a mould; manufacturing a curved surface cover plate with more than two curved surfaces; and the curved screen body is attached to the curved cover plate. The preparation method of the curved screen solves the problem that the curved screen is easy to break in the preparation process due to the existence of shear stress, and the curved screen prepared by the preparation method is smooth in surface and can be suitable for preparing the curved screen with more than two curved surfaces.

Description

Curved screen and preparation method thereof

Technical Field

The disclosure relates to the field of display screen manufacturing, in particular to a curved screen and a preparation method thereof.

Background

As the technology of flexible screens is gradually mature, the flexible characteristics of flexible screens are continuously developed and utilized, and flexible screens are used in various electronic devices. Among them, a curved-screen electronic device capable of displaying a screen on both the front and side surfaces of the electronic device has become a competitive field for various manufacturers.

In the manufacturing process of the curved screen, the curved screen and the cover plate need to be attached. In the related art, the curved screen and the cover plate are usually attached by using the silica gel block, and the method is difficult to accurately control deformation caused by extrusion in the attaching process and has the risk of poor attaching.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a curved screen and a method for manufacturing the curved screen.

According to a first aspect of the embodiments of the present disclosure, a method for manufacturing a curved screen is provided, which includes manufacturing a curved screen body having two or more curved surfaces through a mold; manufacturing a curved surface cover plate with more than two curved surfaces; and the curved screen body is attached to the curved cover plate.

In an embodiment, the method for preparing the curved screen further includes: preparing the mold having a four-sided curved surface shape; and preparing the die which corresponds to the shape of the back surface of the curved screen body and is provided with four curved surfaces. .

In one embodiment, the manufacturing of the curved screen with more than two curved surfaces through the mold includes: attaching the back surface of the flexible screen body to the mold through the bonding layer; and applying pressure in two directions on the flexible screen body to bend the flexible screen body to form the curved screen body.

In one embodiment, the applying two-directional pressure on the flexible screen body includes: and pressing the flexible screen body along the two directions through a rolling component to enable the back surface of the flexible screen body to be attached to the mold.

In one embodiment, the tie layers include a first tie layer and a second tie layer having a viscosity greater than the first tie layer; the first bonding layer is attached to the flexible screen body; the second adhesive layer is attached to the mold.

In one embodiment, the first adhesive layer is a resin adhesive layer whose molecular bonds are broken when irradiated with ultraviolet rays or heated.

In an embodiment, the attaching the curved screen body and the curved cover plate includes: arranging an adhesive part inside the curved cover plate; and attaching the front surface of the curved screen body to the viscose part.

In one embodiment, the adhesive component is a fluid adhesive; and curing the fluid adhesive by irradiating ultraviolet rays or heating so as to attach the curved screen body to the curved cover plate.

In one embodiment, said attaching the front surface of the curved screen to the adhesive member includes: and pressing the curved screen body towards the curved cover plate to fill the fluid adhesive between the curved cover plate and the curved screen body.

In an embodiment, after the curved screen body and the curved cover plate are attached to each other, the mold is separated from the curved screen body.

In one embodiment, the curved screen body is a four-sided curved screen; the curved surface cover plate is a four-side curved surface cover plate.

According to a second aspect of the embodiments of the present disclosure, there is provided a curved panel manufactured by the method for manufacturing any one of the curved panels described above, the curved panel having four curved surfaces.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: according to the manufacturing method, the curved-surface screen body is manufactured through the mold, and then the curved-surface screen body is attached to the curved-surface cover plate, so that the pressure applied to the curved-surface screen body in the manufacturing process is controllable, and the problem that the curved-surface screen body is easy to break in the manufacturing process due to the existence of shear stress is solved. In addition, the mode can avoid the error of the attaching sequence in the preparation process of the curved screen, and ensure that no bubbles are mixed in the prepared curved screen. The curved screen prepared by the preparation method disclosed by the invention is smooth in surface and can be suitable for preparing curved screens with two or more curved surfaces.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a flow chart illustrating a method of making a curved screen according to an exemplary embodiment.

Fig. 2a is a schematic structural diagram illustrating a mold for manufacturing a curved screen body according to an exemplary embodiment.

Fig. 2b is a schematic diagram illustrating a flexible screen according to an exemplary embodiment.

Fig. 2c is a schematic structural diagram of a four-side curved screen according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating a curved cover plate structure having more than two curved surfaces according to an exemplary embodiment.

Fig. 4 is a schematic structural diagram illustrating a curved screen body and a curved cover plate that are attached to each other according to an exemplary embodiment.

FIG. 5 is a flow chart illustrating a method of fabricating a mold according to an exemplary embodiment.

FIG. 6 is a flow chart illustrating a method for forming a curved screen body with a mold according to an exemplary embodiment.

FIG. 7 is a flow chart illustrating a method for forming a curved screen body with a mold according to another exemplary embodiment.

FIG. 8 is a schematic diagram illustrating a bonding layer structure according to an exemplary embodiment.

Fig. 9 is a schematic diagram illustrating a rolling member according to an exemplary embodiment.

FIG. 10 is a flow chart illustrating a process for attaching a curved screen body to a curved cover plate according to an exemplary embodiment.

FIG. 11 is a flow chart illustrating a process for conforming a curved screen body to a curved cover plate according to another exemplary embodiment.

Fig. 12 is a flowchart illustrating a method of manufacturing a curved screen according to another exemplary embodiment.

FIG. 13 is a schematic diagram illustrating the structure of a curved screen according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

With the development of technology, more and more manufacturers have introduced electronic devices having flexible display screens. The flexible display screen is typically an OLED (organic light-Emitting Diode). The OLED is a device for generating electroluminescence by utilizing a multi-layer organic thin film structure, and compared with the LCD, the OLED display screen is lighter and thinner, has high brightness, low power consumption, quick response, high definition, good flexibility and high luminous efficiency, and can meet the increasingly high requirements of users on display technology. More and more manufacturers worldwide are invested in research and development, the industrialization process of the OLED is greatly promoted, and the mass production of the flexible display screen is promoted.

Due to the characteristic of being bendable, the flexible display screen can be used for manufacturing wearable equipment, bendable electronic equipment and curved screen electronic equipment. For example, when the curved-surface screen mobile phone is manufactured, the curved design of the whole curved-surface screen mobile phone is beneficial to holding, the curved-surface screen mobile phone is better attached to the palm radian, the distance of a thumb touching the screen during single-hand operation is reduced, and the experience of transverse screen crossing operation under a large-size screen is promoted. And the screen can be made thinner, lightweight, and low power consumption. The curved screen increases the angle of visibility, so the effect is good even when viewed at an off-center angle.

In the related technology, in the manufacturing process of the curved screen, the flexible screen body is pushed to be attached to and extruded by the curved cover plate through the silica gel block, and the flexible screen body is bent and fixed to the curved screen by utilizing the bending shape of the curved cover plate. However, in the process of laminating and extruding the flexible screen body and the curved cover plate, the deformation of the flexible screen body is difficult to control accurately, shear stress exists, and the condition that the screen body cracks due to uneven stress of the flexible screen body is easy to occur.

In addition, in the preparation process of the curved screen with the curved surfaces above two surfaces, the risk of wrong lamination sequence exists. When the flexible screen body is pushed to be attached to the curved cover plate through the silica gel block, one side of the flexible screen body is attached to the curved surface of the curved cover plate first, and the part, corresponding to the plane of the curved cover plate, of the flexible screen body is attached to the curved cover plate later. The edge part of the flexible screen body is firstly attached to the curved cover plate, the middle part of the flexible screen body is then attached to the curved cover plate, and the condition that the periphery is firstly sealed is formed in the space between the flexible screen body and the curved cover plate. Therefore, in the subsequent extrusion process, air existing between the flexible screen body and the curved cover plate is difficult to discharge, and air bubbles are mixed in the finally formed curved screen.

Aiming at the technical scheme, the disclosure provides a preparation method of a curved screen. FIG. 1 is a flow chart illustrating a method of making a curved screen according to an exemplary embodiment. As shown in fig. 1, the preparation method of the curved screen of the present disclosure includes the following steps:

in step S11, a curved screen body having two or more curved surfaces is manufactured by a mold.

In the embodiment of the disclosure, the curved screen body is manufactured by the mold. The mold of the present disclosure may be a mold having two or more curved surfaces, for example, may be a mold 100 as shown in fig. 2 a. Fig. 2a is a schematic structural diagram illustrating a mold for manufacturing a curved screen body according to an exemplary embodiment. The shape of the mold 100 of the present disclosure is determined by the shape of the curved screen body that needs to be prepared. For example, when the manufacturing purpose is to manufacture a curved screen having four curved surfaces, it is necessary to first manufacture the mold 100 having four curved surfaces.

In the disclosed embodiment, the curved screen body of the present disclosure may be made of a flexible screen body that is bent according to the shape of the mold 100. The flexible screen body has flexibility, and when the flexible screen body which is not shaped is placed on the mold 100, the flexible screen body can be attached to the mold 100 and bent into a shape corresponding to the mold 100 according to the shape of the mold 100. In the embodiment of the present disclosure, the flexible screen body may be formed by bending more than two sides of the flexible screen body corresponding to the curved surface of the mold 100 to form a curved surface according to the shape of the mold 100 having more than two curved surfaces, and attaching the curved screen body to the mold 100. Fig. 2b is a schematic structural diagram of a flexible screen according to an exemplary embodiment, and as shown in fig. 2b, the flexible screen 800 may be planar, and the planar flexible screen 800 is attached to the mold 100 having two or more curved surfaces, so as to form a curved screen.

The preparation method in the embodiment of the present disclosure may be used for preparing a curved screen body with four curved surfaces, as shown in fig. 2c, fig. 2c is a schematic structural diagram of a curved screen body with four curved surfaces shown according to an exemplary embodiment. Taking a mobile phone or a tablet computer as an example, the curved screen body used for electronic equipment such as the mobile phone or the tablet computer can be a four-side curved screen. Namely, the curved screen body 200 has a first curved surface 201, a second curved surface 202, a third curved surface 203 and a fourth curved surface 204. The first curved surface 201, the second curved surface 202, the third curved surface 203 and the fourth curved surface 204 may be disposed at four sides of the electronic device, respectively, to increase a display area of the electronic device. When the curved screen body with the four curved surfaces is prepared, the mold 100 is required to be provided with the four curved surfaces, the flexible screen body 800 is attached to the mold 100 with the four curved surfaces, and four side edges of the flexible screen body 800 are bent according to the four curved surfaces of the mold 100 to form the curved screen body with the four curved surfaces.

In step S12, a curved surface cover plate having two or more curved surfaces is produced.

The curved surface cover plate manufactured in the embodiment of the disclosure has more than two curved surfaces. The method for manufacturing the curved cover plate disclosed by the disclosure can be a manufacturing method commonly used in the field. In the embodiment of the present disclosure, the curved cover plate 500 has more than two curved surfaces, and the shape of the curved cover plate 500 corresponds to the shape of the curved screen body 200. Fig. 3 is a schematic structural view of a curved cover plate having two or more curved surfaces according to an exemplary embodiment, as shown in fig. 3. That is, the number of the curved surfaces of the curved surface cover plate 500 is equal to the number of the curved surfaces of the curved surface screen body 200, and the curved surfaces of the curved surface cover plate 500 are arranged to correspond to the curved surfaces of the curved surface screen body 200, so that the curved surface cover plate 500 can cover the curved surface screen body 200, thereby protecting the curved surface screen body 200. In some embodiments, the curved cover plate 500 may be configured to just cover the curved screen body 200. In other possible embodiments, the curved cover plate 500 may be configured to be larger than the curved screen body 200, and the disclosure is not particularly limited as long as the purpose can be achieved. In the embodiment of the present disclosure, when the curved screen body 200 has the first curved surface 201, the second curved surface 202, the third curved surface 203 and the fourth curved surface 204, the curved cover plate 500 also has four curved surfaces respectively for covering and protecting the curved screen body 200.

In the embodiment of the present disclosure, the material of the curved cover plate 500 may be glass, polymethyl methacrylate (PMMA) or Polycarbonate (PC). In one embodiment of the present disclosure, the curved cover plate 500 is made of glass. The curved cover plate 500 is a glass cover plate.

In the embodiment of the present disclosure, the inner diameter of the curved cover plate 500 may be set to be 0.05-0.5mm larger than the single side of the curved screen body 200. In the present disclosure, the curved cover plate 500 is used to protect the curved screen body 200, that is, the curved cover plate 500 covers the curved screen body 200. The side of the curved cover plate 500 on which the curved surface is disposed is the inner side of the cover plate 500, the inner side of the curved cover plate 500 is configured to accommodate the curved screen body 200, and a device for fixing the curved screen may need to be disposed on the inner side of the curved cover plate 500, so the inner diameter of the curved cover plate 500 is greater than that of the curved screen body 200. Specifically, the inner diameter of the curved cover plate 500 may be set to be 0.05-0.5mm larger than the size of the front surface of the curved screen body 200. For example, the inner diameter of the curved cover plate 500 may be set to be 0.1-0.3mm larger than the size of the front surface of the curved screen body 200.

In step S13, the curved panel and the curved cover are bonded together.

The curved screen body 200 is attached to the curved cover plate 500, that is, the front surface of the curved screen body 200 is attached to the inner side of the curved cover plate 500. The front surface of the curved screen body 200 and the inner side of the curved cover plate 500 can be attached and fixed by a double-sided adhesive tape or other adhesive components, for example. In addition, in the embodiment of the present disclosure, a surface of the curved screen body 200 for displaying is a front surface, and a surface opposite to the front surface of the curved screen body 200 is a back surface. The shape of the mold 100 in the manufacturing method of the present disclosure is consistent with the shape of the back of the curved screen body, so that the flexible screen body can be fixed as the curved screen body by the mold 100 of the present disclosure. Fig. 4 is a schematic structural diagram illustrating a curved screen body and a curved cover plate that are attached to each other according to an exemplary embodiment. As shown in fig. 4, in the curved screen manufacturing method of the present disclosure, the curved screen body 200 and the curved cover plate 500 are manufactured through the mold 100, the shape of the curved screen body 200 is fixed, and then the curved screen body 200 and the curved cover plate 500 are attached to each other, that is, the curved screen body 200 does not deform during the attachment process of the curved screen body 200 and the curved cover plate 500, that is, the pressure applied to the curved screen body 200 during the entire attachment process is controllable. Therefore, the problem that the curved screen body 200 is easy to break in the preparation process due to shear stress when the curved screen body is not fixed and is attached to the curved cover plate can be solved. Moreover, the shape of the curved screen body 200 manufactured by the mold 100 is matched with the shape of the curved cover plate 500, so that the front surface of the curved screen body 200 can be completely attached to each position of the inner side of the curved cover plate 500 in the process of attaching the curved screen body 200 to the curved cover plate 500, the situation that the edge part is attached to the curved cover plate firstly and the middle part is attached to the curved cover plate later is avoided, and further, bubbles are not mixed in the screen body of the manufactured curved screen body 200. Wherein the curved screen body 200 without air bubbles is relatively flat.

In the method for manufacturing the curved screen, in order to manufacture the curved screen body through the mold, the mold 100 is required to be manufactured first. FIG. 5 is a flow chart illustrating a method of fabricating a mold according to an exemplary embodiment. As shown in fig. 5, the method of making the mold 100 of the present disclosure includes the steps of:

in step S21, a mold having a four-sided curved surface shape is prepared.

In the embodiment of the present disclosure, the curved screen body is prepared by the mold 100, and the shape of the mold 100 is determined by the shape of the curved screen body to be prepared. For example, when the manufacturing purpose is to manufacture a curved screen having four curved surfaces, it is necessary to first manufacture the mold 100 having four curved surfaces.

In the embodiment of the present disclosure, the material of the mold 100 may be plastic or metal, and may be determined according to the characteristics of the size, hardness, and the like of the curved screen body to be manufactured. The mold 100 may be formed by integrally molding one material or two materials, for example, a plastic material may be used as a part thereof, and a metal material may be used as a part thereof.

In step S22, a mold corresponding to the shape of the back surface of the curved screen body and having a four-sided curved surface is prepared.

In the embodiment of the present disclosure, the mold 100 has four curved surfaces and the shape of the mold corresponds to the shape of the back surface of the curved screen, so that the curved screen is manufactured by the mold 100, and the back surface of the manufactured curved screen 200 has the shape corresponding to the four curved surfaces of the mold 100.

In the embodiment of the present disclosure, the method for manufacturing the curved screen body 200 by using the mold 100 may be various, and the present disclosure is not limited thereto. In one example, the flexible screen can be manufactured by attaching the back surface of the flexible screen to a mold. For example, the back side of the flexible screen is attached to the mold by an adhesive layer.

FIG. 6 is a flow chart illustrating a method for forming a curved screen body with a mold according to an exemplary embodiment. As shown in fig. 6, the manufacturing of the curved screen body 200 includes the following steps:

in step S31, the back surface of the flexible screen is bonded to the mold via the adhesive layer.

In the embodiment of the present disclosure, the flexible screen 800 has flexibility, and can be bent to form the curved screen 200 according to the shape of the mold 100 when being attached to the mold 100. However, the flexible panel 800 is likely to move or slide only when it is attached to the mold 100, and is difficult to fix. As shown in fig. 2b and 3, the flexible screen 800 can be fixed on the mold 100 by attaching the back surface of the flexible screen 800 to the mold 100 through the adhesive layer 300, so that the shape of the curved screen 200 formed in this way is more stable.

In step S32, two-directional pressure is applied to the flexible screen to bend the flexible screen to form a curved screen.

In the embodiment of the present disclosure, when the flexible screen 800 is attached to the mold 100, it is difficult to completely attach the side surface of the flexible screen 800 to the curved surface of the mold 100 only by using the bendability of the flexible screen 800, and the accuracy of the shape of the formed curved screen 200 is not high. By applying an acting force on the flexible screen body 800, the flexible screen body 800 can be attached to the mold 100 more tightly, and the accuracy of the curved screen body 200 is higher.

In the embodiment of the present disclosure, the curved screen body 200 is made of a flexible screen body 800, and the curved screen body 200 is a screen with a curved surface formed by bending the flexible screen body 800. In the present disclosure, the back surface of the flexible screen body 800 is the back surface of the curved screen body 200, and the flexible screen body 800 is attached to the mold 100 by attaching the back surface to the mold. According to the flexible screen body 800 attached to the mold 100 through the adhesive layer 300, the adhesive layer 300 can be attached to the back surface of the flexible screen body 800 or the surface of the mold 100, and the purpose of attaching the flexible screen body 800 to the mold 100 can be achieved. The adhesive layer 300 may be a material having adhesiveness on both sides, such as a double-sided tape, and may be formed of one of an elastomer-type pressure-sensitive adhesive, a resin-type pressure-sensitive adhesive, and an acrylic-type pressure-sensitive adhesive, for example. In the embodiment of the present disclosure, a double-sided adhesive tape formed by a resin type pressure sensitive adhesive may be used, and such double-sided adhesive tape may have a broken molecular bond and a reduced viscosity under the condition of ultraviolet irradiation or heating, so as to facilitate the separation of the curved screen body 200 from the mold 100.

In a possible embodiment, the following steps may also be included in step 31 of the present disclosure:

in step S311, the adhesive layer is attached to the back surface of the flexible screen body.

When the adhesive layer 300 is a double-sided tape, the adhesive layer 300 is attached to the back surface of the flexible screen 800.

In step S312, the back surface of the flexible screen is attached to the mold.

The back surface of the flexible panel 800 to which the adhesive layer 300 is attached to the mold 100.

In another possible embodiment, the following steps may also be included in step 31 of the present disclosure:

in step S313, the adhesive layer is attached to the mold.

When the adhesive layer 300 is a double-sided tape, the adhesive layer 300 is attached to the mold 100.

In step S314, the back surface of the flexible screen is attached to a mold.

The back surface of the flexible panel 800 is attached to the mold 100 to which the adhesive layer 300 is attached.

In the embodiment of the present disclosure, after the flexible screen 800 is attached to the mold 100, since the mold 100 is formed according to the shape of the back surface of the curved screen 200, the shape of the back surface of the curved screen 200 may correspond to that of the mold 100, and the mold 100 has a curved surface, for example, a four-sided curved surface. In order to fabricate the curved screen 200 with a more precise shape, after the flexible screen 800 is attached to the mold 100, a force is applied to the flexible screen 800 to bend the flexible screen 800 to form the curved screen 200. The curved screen 200 of the present disclosure has more than two curved surfaces. When a rectangular electronic device such as a mobile phone or a tablet is taken as an example, to manufacture a curved screen body with two or more curved surfaces, acting forces need to be applied in two directions, namely the length direction and the width direction of the electronic device, to obtain the curved screen body 200 with two or more curved surfaces. In the case of manufacturing a curved screen body of an irregular or circular electronic device such as a wearable device, if necessary, after the flexible screen body is attached to a mold, pressure may be applied to the flexible screen body in a plurality of directions to bend the flexible screen body to form a desired curved screen body.

In the present disclosure, a method for applying pressure to the flexible screen 800 may be various, for example, the flexible screen 800 may be applied by a manufacturing device such as a carrying fixture. The flexible screen 800 may also be pressurized by other components. FIG. 7 is a flow chart illustrating a method for forming a curved screen body with a mold according to another exemplary embodiment. As shown in fig. 7, the manufacturing of the curved screen body 200 includes the following steps:

in step S41, the back surface of the flexible screen is bonded to the mold via the adhesive layer.

In the embodiment of the present disclosure, in order to attach the flexible screen body 800 to the mold 100 and facilitate separation of the molded curved screen body 200 from the mold 100, the bonding layer 300 may be further optimized. For example, the adhesive layer 300 may be internally divided into a plurality of layers having different viscosities. As shown in fig. 8, fig. 8 is a schematic diagram illustrating a structure of a bonding layer according to an exemplary embodiment. In the embodiment of the present disclosure, the adhesive layer 300 may include a first adhesive layer 301 and a second adhesive layer 302 having a viscosity greater than that of the first adhesive layer 301, where the first adhesive layer 301 is attached to the flexible screen 800, and the second adhesive layer 302 is attached to the mold 100. The back surface of the flexible panel 800 is attached to the mold 100 through the adhesive layer 300, that is, one surface of the adhesive layer 300 is attached to the flexible panel 800, and the other surface opposite to the one surface of the adhesive layer 300 is attached to the mold 100. In the embodiment of the present disclosure, one surface attached to the flexible screen 800 is a first adhesive layer 301, and the other surface attached to the mold 100 is a second adhesive layer 302. Also, the viscosity of the second adhesive layer 302 is greater than the viscosity of the first adhesive layer 301. Such an arrangement not only can complete the attachment of the flexible screen 800 to the mold 100, but also can facilitate the separation of the adhesive layer 300 and the mold 100 from the curved screen 200 after the curved screen 200 is manufactured. In the process of separating the bonding layer 300 and the mold 100 together from the curved panel 200, since the viscosity of the second bonding layer 302 is greater than that of the first bonding layer 301, the first bonding layer 301 is more easily separated from the curved panel 200 than the second bonding layer 302 is separated from the mold 100. In this arrangement, the adhesive layer 300 is not left in the curved panel 200.

In some possible embodiments, the first adhesive layer 301 may be further provided as a resin adhesive layer whose molecular bonds are broken when ultraviolet rays are irradiated or heated. The resin adhesive layer may be composed of one or more of polymers such as polyethylene terephthalate, polybutylene terephthalate, and polyarylate. The first adhesive layer 301 is made of such a material that the molecular bond is broken when the first adhesive layer is irradiated with ultraviolet rays or heated, the viscosity is reduced, and the first adhesive layer is easily separated from the curved screen body 200. That is, after the curved panel 200 is manufactured, the first adhesive layer 301 may be irradiated with ultraviolet rays or heated to easily separate the adhesive layer 300 from the curved panel 200, thereby preventing the adhesive layer 300 from remaining inside the curved panel 200.

In step S42, the rolling member presses the flexible panel in two directions to bond the back surface of the flexible panel to the mold.

In the embodiment of the present disclosure, the rolling member 400 may be a cylindrical roller capable of uniformly pressing the flexible screen body 800 to make the flexible screen body 800 fit along the mold 100. The cylindrical rolling component 400 is suitable for rolling on a curved surface, can ensure uniform force application while rolling on the curved surface, and can tightly attach the flexible screen body 800 to the mold 100 to form the curved screen body 200 with higher precision. As shown in fig. 9, fig. 9 is a schematic view illustrating a structure of a rolling member according to an exemplary embodiment. In the disclosed embodiment, the flexible screen body 800 may be pressed using a rolling member 400 such as a scroll wheel. When a rectangular electronic device such as a mobile phone or a tablet is used as an example, the flexible screen body 800 is pressed in two directions by the rolling member 400, and a curved screen having two or more curved surfaces is manufactured, forces are applied in two directions, namely, a length direction and a width direction of the electronic device, to obtain the curved screen body 200 having two or more curved surfaces. When manufacturing a curved screen body of an irregular-shaped or circular-shaped electronic device such as a wearable device, the present disclosure is not limited thereto, and if necessary, after the flexible screen body is attached to a mold, the rolling member 400 may be used to apply pressure to the flexible screen body in a plurality of directions to bend the flexible screen body to form a desired curved screen body.

In step S43, the flexible screen is bent to form a curved screen.

In the present disclosure, the curved screen body 200 and the curved cover plate 500 are manufactured through the above embodiments, and the method for manufacturing the curved screen of the present disclosure further includes a step of attaching the curved screen body 200 and the curved cover plate 500 to each other. FIG. 10 is a flow chart illustrating a process for attaching a curved screen body to a curved cover plate according to an exemplary embodiment. As shown in fig. 10, the step of attaching the curved screen body to the curved cover plate further includes:

in step S51, an adhesive member is provided inside the curved cover plate.

In the embodiment of the present disclosure, an adhesive member 600 is disposed inside the curved cover plate 500 for attaching the curved cover plate 500 to the curved screen body 200.

In step S52, the front surface of the curved screen body is bonded to the adhesive member.

In the embodiment of the present disclosure, after the viscose part 600 is disposed inside the curved cover plate 500, the front surface of the curved screen body 200 is attached to the viscose part 600, that is, the front surface of the curved screen body 200 is attached to the inside of the curved cover plate 500 through the viscose part 600, so as to complete the attachment of the curved screen body 200 to the curved cover plate 500.

FIG. 11 is a flow chart illustrating a process for conforming a curved screen body to a curved cover plate according to another exemplary embodiment. As shown in fig. 11, the step of attaching the curved screen body to the curved cover plate may further include:

in step S61, an adhesive member is provided inside the curved cover plate.

In step S62, the front surface of the curved screen body is bonded to the adhesive member.

In step S63, the curved screen body is pressed against the curved cover plate such that the fluid adhesive fills between the curved cover plate and the curved screen body.

In the embodiment of the present disclosure, the adhesive member 600 may be a fluid adhesive, for example, a liquid adhesive or a solid adhesive, as long as it has fluidity. The adhesive member 600 in the embodiment of the present disclosure may be a liquid adhesive, for example, a liquid optical adhesive. The liquid optical cement has the characteristics of colorless transparency and light transmittance of more than 98%, can be used for bonding transparent optical elements, and is suitable for bonding between the transparent curved cover plate 500 and the curved screen body 200.

Due to the fluidity of the adhesive member 600, after the curved panel 200 is attached to the curved cover plate 500, the curved panel 200 may be pressed toward the curved cover plate 500, so that the fluid adhesive is filled between the curved cover plate 500 and the curved panel 200. Because the internal diameter of curved surface apron 500 is greater than curved surface screen body 200, promptly after the laminating of curved surface screen body 200 and curved surface apron 500, there is certain space between curved surface screen body 200 and curved surface apron 500, think that curved surface apron 500's direction is pressed curved surface screen body 200, can make viscose part 600 flow, thereby further reduce the distance between curved surface screen body 200 and curved surface apron 500, and can make viscose part 600 flow and extend, fill up the space between curved surface screen body 200 and curved surface apron 500, further strengthen the fastness of laminating between curved surface screen body 200 and the curved surface apron 500.

Further, the fluid adhesive can be cured by irradiation of ultraviolet rays or heating, so that the curved screen body can be attached to the curved cover plate. After the curved screen body 200 and the curved cover plate 500 are attached to each other, the fluid adhesive is cured by ultraviolet rays or heat, so that the curved screen body 200 and the curved cover plate 500 are fixed.

It should be noted that, in the present disclosure, the flexible screen body is manufactured into the curved screen body through the mold, and then the curved screen body is attached to the curved cover plate. In the process, the die is attached to the curved screen body, so that the curved screen body is conveniently shaped, and in the process of attaching and extruding the curved screen body and the curved cover plate, pressure can be applied through the die, so that the stress of the curved screen body can be kept uniform.

Fig. 12 is a flowchart illustrating a method of manufacturing a curved screen according to another exemplary embodiment. As shown in fig. 12, the steps of the preparation method of the curved screen may be:

in step S71, the mold having a four-sided curved surface shape is prepared.

In step S72, the back surface of the flexible screen is bonded to the mold via the adhesive layer.

In the embodiment of the present disclosure, the adhesive layer 300 is attached to the back of the flexible screen body 800, then the flexible screen body 800 is aligned with the mold 100, and then the back of the flexible screen body 800 is attached to the mold.

In the embodiment of the present disclosure, the adhesive layer 300 may be provided to include a first adhesive layer 301 and a second adhesive layer 302, and the first adhesive layer 301 may also be provided as a resin adhesive layer in which molecular bonds are broken when ultraviolet rays are irradiated or heated. The first adhesive layer 301 is made of such a material that the molecular bond is broken when the first adhesive layer is irradiated with ultraviolet rays or heated, the viscosity is reduced, and the first adhesive layer is easily separated from the curved screen body 200. That is, after the curved panel 200 is manufactured, the first adhesive layer 301 may be irradiated with ultraviolet rays or heated to easily separate the adhesive layer 300 from the curved panel 200, thereby preventing the adhesive layer 300 from remaining inside the curved panel 200.

In step S73, a curved screen having a four-sided curved shape is manufactured by a mold.

In step S74, a curved cover plate having a four-sided curved shape is produced.

In step S75, an adhesive member is provided inside the curved cover plate.

In step S76, the front surface of the curved screen body is bonded to the adhesive member.

In the embodiment of the present disclosure, due to the fluidity of the adhesive member 600, after the curved panel 200 is attached to the curved cover plate 500, the curved panel 200 may be pressed toward the curved cover plate 500, so that the fluid adhesive is filled between the curved cover plate 500 and the curved panel 200. Because the internal diameter of curved surface apron 500 is greater than curved surface screen body 200, promptly after the laminating of curved surface screen body 200 and curved surface apron 500, there is certain space between curved surface screen body 200 and curved surface apron 500, think that curved surface apron 500's direction is pressed curved surface screen body 200, can make viscose part 600 flow, thereby further reduce the distance between curved surface screen body 200 and curved surface apron 500, and can make viscose part 600 flow and extend, fill up the space between curved surface screen body 200 and curved surface apron 500, further strengthen the fastness of laminating between curved surface screen body 200 and the curved surface apron 500. In the embodiment of the present disclosure, the curved screen body 200 and the curved cover plate 500 may be aligned, and then the curved screen body 200 and the curved cover plate 500 are attached to each other through the adhesive component 600.

Further, since the fluid adhesive is cured by irradiation of ultraviolet rays or heating, the curved screen can be attached to the curved cover plate. After the curved screen body 200 and the curved cover plate 500 are attached to each other, the fluid adhesive is cured by ultraviolet rays or heat, so that the curved screen body 200 and the curved cover plate 500 are fixed.

In step S77, after the curved panel and the curved cover plate are bonded together, the mold is separated from the curved panel.

FIG. 13 is a schematic diagram illustrating the structure of a curved screen according to an exemplary embodiment. As shown in fig. 13, in the embodiment of the present disclosure, in step S76, when the fluid adhesive is cured by ultraviolet rays or heat to fix the curved screen body 200 and the curved cover plate 500, the adhesive layer 300 is irradiated or heated by ultraviolet rays to reduce the viscosity of the first adhesive layer 301, and is separated from the curved screen body 200, so that the mold 100 is separated from the curved screen body 200, and finally, the excess adhesive remaining at the four corners of the curved screen body 200 is cleaned, so that the curved screen is prepared.

Based on the same conception, the embodiment of the disclosure also provides a curved screen. The curved panel of the present disclosure has four curved surfaces, and may be manufactured by any one of the aforementioned methods of manufacturing a curved panel.

According to the curved screen, the curved screen body and the curved cover plate are manufactured through the die, the shape of the curved screen body is fixed, and then the curved screen body is attached to the curved cover plate, namely, the curved screen body cannot deform in the attaching process of the curved screen body and the curved cover plate, namely, the pressure of the curved screen body in the whole attaching process is controllable. Therefore, the problem that the curved screen body is easy to break in the preparation process due to the shear stress when the curved screen body is not fixed and is attached to the curved cover plate can be solved. And the shape of the curved screen body manufactured by the die is matched with that of the curved cover plate, so that the front surface of the curved screen body can be completely attached to each position of the inner side of the curved cover plate in the attaching process of the curved screen body and the curved cover plate, the condition that the edge part is attached to the curved cover plate firstly and the middle part is attached to the curved cover plate later is avoided, and bubbles are not mixed in the prepared curved screen body. The curved screen of this disclosure is surperficial level, and has four sides curved surface.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

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

manufacturing a curved screen body with more than two curved surfaces through a mold;

manufacturing a curved surface cover plate with more than two curved surfaces; and

and attaching the curved screen body and the curved cover plate.

2. The method for preparing a curved screen according to claim 1, further comprising:

preparing the mold having a four-sided curved surface shape;

and preparing the die which corresponds to the shape of the back surface of the curved screen body and is provided with four curved surfaces.

3. The method for manufacturing the curved screen according to claim 1, wherein the step of manufacturing the curved screen body with more than two curved surfaces through the mold comprises the following steps:

attaching the back surface of the flexible screen body to the mold through the bonding layer;

and applying pressure in two directions on the flexible screen body to bend the flexible screen body to form the curved screen body.

4. The method for preparing a curved screen according to claim 3, wherein the applying pressure in two directions on the flexible screen body comprises:

and pressing the flexible screen body along the two directions through a rolling component to enable the back surface of the flexible screen body to be attached to the mold.

5. The method for preparing a curved screen according to claim 3,

the bonding layers comprise a first bonding layer and a second bonding layer with viscosity larger than that of the first bonding layer;

the first bonding layer is attached to the flexible screen body;

the second adhesive layer is attached to the mold.

6. The method for preparing a curved screen according to claim 5,

the first bonding layer is a resin adhesive layer with molecular bonds broken when ultraviolet rays are irradiated or heated.

7. The method for preparing the curved screen according to claim 1, wherein the step of attaching the curved screen body to the curved cover plate comprises:

a viscose part is arranged in the curved surface cover plate;

and attaching the front surface of the curved screen body to the viscose part.

8. The method for preparing a curved screen according to claim 7,

the viscose part is a fluid adhesive;

and curing the fluid adhesive by irradiating ultraviolet rays or heating so as to attach the curved screen body to the curved cover plate.

9. The method for preparing a curved screen according to claim 8, wherein the attaching the front surface of the curved screen body to the adhesive member comprises:

and pressing the curved screen body towards the curved cover plate to fill the fluid adhesive between the curved cover plate and the curved screen body.

10. The method for preparing a curved screen according to claim 1, further comprising:

and after the curved surface screen body is attached to the curved surface cover plate, the mold is separated from the curved surface screen body.

11. The method for preparing a curved screen according to claim 1,

the curved screen body is a four-side curved screen;

the curved surface cover plate is a four-side curved surface cover plate.

12. A curved panel characterized by having a four-sided curved surface, produced by the production method of any one of claims 1 to 11.