Bonding fixture and bonding method for curved screen, carrier film, curved screen

Abstract

The present application provides a fitting jig and a fitting method for a curved screen, a carrier film, a curved screen, and an electronic device. The fitting jig is provided with corner clamping components corresponding to the respective corners of the display panel assembly. A corner pulling portion is correspondingly connected to the corner of the main body portion of the carrier film of the display panel assembly. The corner pulling portion is clamped by the corner clamping components, and the corner clamping components move to pull the corner pulling portion. The corner pulling portion deforms under the action of the tensile force, and the deformation of the corner pulling portion of the carrier film causes the corner of the main body portion to deform. The corner of the main body portion drives the corner of the display panel bonded thereto to bend towards the back surface of the display panel, so that the corner of the display panel forms a curved surface structure. In this way, during the process of bending the edge of the display panel by the clamping mechanism, the stress concentration phenomenon at the corner of the display panel can be avoided, so as to improve the performance of the curved screen, improve the fitting effect of the curved screen, and a curved screen in the "eight-curved" form with the long side, short side, and corner all bent can be formed.

Description

Technical Field

[0001] The present application relates to the technical field of curved screen processing, and particularly relates to a fitting fixture for a curved screen, a fitting method, a carrier film, a curved screen, and an electronic device. Background Art

[0002] With the development of display technology, curved screens are gradually applied to display devices such as mobile phones, televisions, and tablet computers. Compared with ordinary flat screens, curved screens have many advantages. For example, they have better elasticity, are not easily broken, can improve the sensory experience, and have a better three-dimensional display effect, etc.

[0003] Since the curved screen has a non-planar structure, the fitting process thereof is more difficult than that of an ordinary flat screen, and a special fitting fixture is required to fit the curved screen. When fitting the curved screen, the display panel with the carrier film attached is placed on the carrier table of the fitting fixture, with the display panel facing upward and away from the carrier table. The carrier film is clamped by a clamp to apply a pulling force thereto, and then, the edge of the display panel is driven to bend towards the direction of the carrier table. After that, the curved cover plate is covered on the display panel, and a pressure is applied to the curved cover plate by the fitting fixture to press and fix the curved cover plate and the display panel.

[0004] However, stress concentration is likely to occur at the corners during the fitting of the curved screen, which will affect the performance of the display panel and the fitting effect between the curved cover plate and the display panel. Summary of the Invention

[0005] The present application provides a fitting fixture for a curved screen, a fitting method, a carrier film, a curved screen, and an electronic device. The fitting fixture and fitting method for the curved screen can reduce the stress concentration phenomenon at the corners during the fitting of the curved screen, improve the display performance of the curved screen, and improve the fitting effect of the curved screen.

[0006] In a first aspect of the present application, a fitting fixture for a curved screen is provided, which includes a carrier table assembly and a clamping mechanism. The carrier table assembly includes a carrier surface for placing a display panel assembly; the clamping mechanism moves up and down in a direction perpendicular to the carrier surface, or moves towards or away from the carrier table assembly in a direction parallel to the carrier surface;

[0007] The display panel assembly includes a display panel and a carrier film. The carrier film is attached to the surface of the display panel facing the carrier surface. The carrier film includes a main body portion and a plurality of pulling portions connected to the periphery of the main body portion. The main body portion covers the display panel, and the pulling portions extend beyond the display panel. The clamping mechanism is used for clamping the pulling portions;

[0008] Wherein, the clamping mechanism includes corner clamping components corresponding to the respective corners of the display panel assembly. The pulling portions include corner pulling portions connected to the corners of the main body portion. The corner clamping components are used for clamping the corner pulling portions.

[0009] The fitting fixture for the curved screen provided by this application, by setting corner clamping components corresponding to the corners of the display panel assembly, corner pulling parts are correspondingly connected to the corners of the main body part of the carrying film of the display panel assembly. The corner pulling parts are clamped by the corner clamping components, and the corner clamping components move to pull the corner pulling parts. The corner pulling parts are deformed under the tensile force, and the deformation of the corner pulling parts of the carrying film causes the deformation of the corners of the main body part. The corners of the main body part drive the corners of the display panel bonded thereto to bend towards the back surface of the display panel, so that the corners of the display panel form a curved surface structure. In this way, during the process of bending the edge of the display panel by the clamping mechanism, the stress concentration phenomenon at the corners of the display panel can be avoided, so as to improve the performance of the curved screen, improve the fitting effect of the curved screen, and a curved screen in the "eight-curved" form with the long sides, short sides and corners all bent can be formed.

[0010] In a possible implementation manner, the corner clamping components are arranged facing the protruding direction of the corners of the display panel assembly.

[0011] By arranging the corner clamping components facing the protruding direction of the corners of the display panel assembly, the acting force of the corner clamping components on the corner pulling parts of the carrying film is concentrated at the center of the corners of the main body part of the carrying film, and each area of the corners of the main body part of the carrying film receives an equalized acting force, so that each area of the curved surface structure formed by the corners of the display panel has a uniform thickness and good flatness.

[0012] In a possible implementation manner, from the end where the corner pulling part is connected to the main body part to the clamped part of the corner pulling part, the width of the corner pulling part gradually increases, and the clamping ends of the corner clamping components completely cover the clamped part of the corner pulling part.

[0013] From the end where the corner pulling part is connected to the main body part to its clamped part, by making the width of the corner pulling part gradually increase, the corner pulling part has an outward-expanded conical structure, and the corner pulling part matches the fan-shaped corners of the main body part. Moreover, by making the clamping ends of the corner clamping components completely cover the width range of the clamped part of the corner pulling part, the acting force of the corner clamping components is evenly transmitted to each area of the corners of the main body part.

[0014] In a possible implementation manner, the clamping mechanism further includes a plurality of side clamping components, and each side clamping component is correspondingly located outside each side of the display panel assembly; the pulling part further includes a plurality of side pulling parts, and each side pulling part is connected to each side of the main body part, and the side clamping components are used for clamping the side pulling parts.

[0015] By setting the side clamping components, the side clamping components clamp and pull the side pulling parts located on the sides of the main body part of the carrying film, the side pulling parts are deformed, and the deformation of the side pulling parts causes the deformation of the sides of the main body part, driving the sides of the display panel to bend.

[0016] In a possible implementation, the number of side clamping components is four, and the four side clamping components respectively correspond to the four sides of the display panel assembly; the number of side pulling parts is four, and the four side pulling parts are respectively connected to the sides of the four sides of the main body part.

[0017] The planar shape of the display panel assembly is rectangular and has four sides. By arranging side pulling parts on the sides of the four sides of the carrier film, correspondingly, four side clamping components are respectively arranged on the four sides of the corresponding display panel assembly, and each side clamping component clamps each side pulling part.

[0018] In a possible implementation, the four side clamping components include two long side clamping components and two short side clamping components. The two long side clamping components are respectively located outside the two long sides of the display panel assembly, and the two short side clamping components are respectively located outside the two short sides of the display panel assembly;

[0019] The four side pulling parts include two long side pulling parts and two short side pulling parts. The two long side pulling parts are connected to the two long sides of the main body part, and the two short side pulling parts are connected to the two short sides of the main body part; the long side clamping component is used to clamp the long side pulling part, and the short side clamping component is used to clamp the short side pulling part.

[0020] By arranging the long side clamping component and the short side clamping component, the long side clamping component clamps and pulls the long side pulling part on the long side of the main body part of the carrier film. The long side pulling part deforms, and the long side of the main body part deforms accordingly, driving the long side of the display panel to bend. The short side clamping component clamps and pulls the short side pulling part on the short side of the main body part of the carrier film. The short side pulling part deforms, and the short side of the main body part deforms accordingly, driving the short side of the display panel to bend.

[0021] In a possible implementation, the corner clamping component, the long side clamping component and the short side clamping component all include an upper clamping plate and a lower clamping plate which are arranged oppositely, and the upper clamping plate and the lower clamping plate are used to clamp the pulling part between the two.

[0022] By arranging the mutually mating upper clamping plate and lower clamping plate, the pulling part of the carrier film is placed between the upper clamping plate and the lower clamping plate, and the pulling part is clamped by the upper clamping plate and the lower clamping plate.

[0023] In a possible implementation, the fitting fixture further includes a driving mechanism, the driving mechanism is connected to the clamping mechanism, and the driving mechanism is used to drive the clamping mechanism to move.

[0024] In a possible implementation, the driving mechanism includes a plurality of driving components, and each driving component is respectively connected to each corner clamping component and each side clamping component.

[0025] By setting up each driving component to respectively drive each corner clamping component, each long side clamping component and each short side clamping component, the clamping components of each pulling part that clamps the supporting film can be individually controlled, thereby individually adjusting the bending deformation of each side and corner of the display panel to ensure the accuracy of the bending deformation of the edge of the display panel.

[0026] In a possible implementation, the support platform assembly includes a base and a buffer pad, the buffer pad is disposed on the base, and the support surface is a surface of the buffer pad facing away from the base.

[0027] By providing a base, the pressure-bearing capacity of the carrier platform assembly is guaranteed. By providing a buffer pad on the base, the pressure on the display panel assembly is buffered, the display panel is protected from damage, and the reliability of the bonding fixture is guaranteed.

[0028] The second aspect of the present application provides a carrier film, including a main body and a plurality of pulling parts connected to the peripheral side of the main body, the plurality of pulling parts including a plurality of side pulling parts and a plurality of corner pulling parts, each side pulling part is connected to each side of the main body, and each corner pulling part is connected to each corner of the main body.

[0029] The carrier film provided in the present application is used to adhere to the back of the display panel, so that the carrier film is deformed by the clamping mechanism of the laminating jig, and the carrier film drives the edge of the display panel to bend. Among them, the main body of the carrier film covers the display panel, and the circumferential edge of the main body is connected to a pulling portion, and the pulling portion includes a side pulling portion connected to the side of the main body, and the side pulling portion extends out of the display panel. The side pulling portion is clamped and pulled by the clamping mechanism to deform, and the sides of the display panel can be bent. In addition, by connecting the corner pulling portion to each corner of the main body, the corner pulling portion extends out of the display panel, and the side pulling portion is clamped and pulled by the clamping mechanism to deform, the corners of the display panel can be bent, so that the corners of the display panel form a curved surface structure. In this way, in the process of bending the edge of the display panel through the clamping mechanism, stress concentration at the corners of the display panel can be avoided, thereby improving the performance of the curved screen and the fitting effect of the curved screen, and forming an "eight-curve" curved screen with curved long sides, short sides and corners.

[0030] In a possible implementation, the pulling portion includes a deformation section and a clamping section, the deformation section is located between the edge of the main body and the clamping section, and the clamping section is used to be clamped by a clamping mechanism of the fitting jig.

[0031] By arranging a deformation section and a clamping section on the pulling portion, the deformation section is connected between the edge of the main body and the clamping section. When working, the clamping mechanism is clamped on the clamping section, and the deformation section is deformed by moving and pulling the clamping mechanism. The deformation section drives the edge of the main body to deform, and then drives the edge of the display panel to bend.

[0032] In a possible implementation, the width of the deformation section of the corner pulling part gradually increases from the end connected to the main body part to the other end.

[0033] From the end where the corner pulling part is connected to the main body part to the clamped part thereof, by making the width of the corner pulling part gradually increase, the corner pulling part has an outward-expanded conical structure, which matches the corner of the fan-shaped main body part, so that the acting force of the clamping mechanism is evenly transmitted to each area of the corner of the main body part.

[0034] In a possible implementation, the width of the deformation section of the side pulling part gradually decreases from the end connected to the main body part to the other end. The width of the clamping section of the side pulling part is smaller than the width of its deformation section.

[0035] By making the width of the clamping section of the side pulling part smaller than the width of the deformation section, there is a clearance space between the clamping sections of adjacent side pulling parts to ensure the smooth movement of the clamping mechanism when clamping each pulling part. In addition, for the deformation section of the side pulling part, from the end connected to the main body part to the other end, by making the width of the deformation section gradually decrease, the width of the deformation section decreases gently and transitions to the clamping section, ensuring that the acting force of the clamping mechanism is evenly transmitted to each area of the side of the main body part.

[0036] In a possible implementation, the shape of the main body part is rectangular, and the side pulling part includes two long-side pulling parts and two short-side pulling parts. The two long-side pulling parts are respectively connected to the two long sides of the main body part, and the two short-side pulling parts are respectively connected to the two short sides of the main body part.

[0037] The third aspect of the present application provides a method for attaching a curved screen, using the curved screen attaching jig as described above, including:

[0038] Attach a carrier film to the back of the display panel to form a display panel assembly; wherein, the carrier film includes a main body part and a plurality of pulling parts connected to the periphery of the main body part. The main body part covers the display panel, and the pulling parts extend outside the display panel. The pulling parts include corner pulling parts connected to the corners of the main body part;

[0039] Place the display panel assembly on the carrier table assembly, make the carrier film face the carrier table assembly, and clamp each pulling part on the clamping mechanism;

[0040] Control the clamping mechanism to move and pull the pulling part, driving the edge of the display panel to bend towards the direction of the carrier table assembly;

[0041] When the bending radian of the edge of the display panel reaches the preset radian, control the clamping mechanism to stop moving, and attach the cover plate to the front of the display panel;

[0042] The clamping mechanism includes corner clamping components corresponding to the corners of the display panel assembly, and clamps each pulling portion on the clamping mechanism, including:

[0043] The corner puller is clamped on the corner clamp assembly.

[0044] The method for laminating a curved screen provided by the present application is to attach a carrier film having a corner pulling portion to the back of a display panel, place the display panel assembly on a carrier platform assembly, and then clamp each pulling portion of the carrier film through a clamping mechanism, and the clamping mechanism moves and pulls each pulling portion, wherein the corner pulling portion is pulled by the corner clamping assembly, and the corner pulling portion is deformed by the tensile force, and the deformation of the corner pulling portion of the carrier film causes the deformation of the corner of the main body, and the corner of the main body drives the corner of the display panel bonded thereto to bend toward the back of the display panel, so that the corner of the display panel forms a curved structure. In this way, in the process of bending the edge of the display panel by the clamping mechanism, stress concentration can be avoided at the corner of the display panel, so as to improve the performance of the curved screen, improve the laminating effect of the curved screen, and form a curved screen with an "eight-curve" shape in which the long side, short side and corner are all curved.

[0045] In a possible implementation manner, the width of the corner pulling portion gradually increases from one end of the corner pulling portion connected to the main body portion to the clamped portion of the corner pulling portion;

[0046] The corner pulling part is clamped on the corner clamping assembly, specifically comprising:

[0047] Move the corner clamping assembly so that the clamping end of the corner clamping assembly completely covers the clamped portion of the corner pulling portion.

[0048] By moving the corner clamping assembly, corresponding to the clamped position of the corner pulling portion, each area in the width direction of the corner pulling portion is clamped on the corner clamping assembly, ensuring that each area in the circumferential direction of the corner pulling portion is in a tensioned state, thereby ensuring the bending effect of the corner of the display panel.

[0049] In a possible implementation manner, before attaching a carrier film to the back of the display panel to form a display panel assembly, the method further includes:

[0050] Along the circumferential direction of the corner of the main body, the corner of the main body and the corner pulling portion are divided into at least two flattened sections.

[0051] Along the circumferential direction of the display panel, the corner of the main body and the corner pulling portion are divided together to form at least two flattened sections. In the process of pulling the corner pulling portion to drive the corner of the main body to deform, the redundancy of the corner of the main body is distributed to each flattened section to avoid bulging of the local area of ​​the corner of the main body, thereby improving the bending effect of the corner of the display panel.

[0052] In a possible implementation, the connection part between the flattened section and the main body is a fan-shaped area, and the central angles of the fan-shaped areas corresponding to the flattened sections are the same.

[0053] By making the central angles of the connection parts between the flattened sections and the main body the same, and dividing the corner part of the main body into multiple fan-shaped areas with equal areas, the balance of the pulling force of the corner clamping component on each flattened section can be improved, and the bending effect of the corner of the display panel can be enhanced.

[0054] In a possible implementation, attaching the cover plate to the front of the display panel specifically includes:

[0055] Keep the clamping mechanism in the current position and maintain the clamping state, so that the pulling part is in a tensioned state;

[0056] Place the cover plate on the front of the display panel;

[0057] Apply pressure to the cover plate to attach the cover plate to the display panel;

[0058] Remove the display panel assembly attached to the front of the display panel from the carrier assembly;

[0059] Remove the carrier film attached to the back of the display panel to form a curved screen.

[0060] After the clamping mechanism bends the display panel in place, by keeping the clamping mechanism in the current position and maintaining the clamping state, the pulling part is kept in a state of pulling the display panel into a curved shape. Then, by placing the cover plate on the front of the display panel and relying on the pressure to attach the cover plate to the display panel. After the cover plate is attached, remove the display panel assembly from the carrier assembly and remove the carrier film attached to the back of the display panel to form a curved screen.

[0061] The fourth aspect of the present application provides a curved screen, which is formed by using the bonding method of the curved screen as described above.

[0062] For the curved screen provided by the present application, when bonding the curved screen, by attaching a carrier film with corner pulling parts to the back of the display panel, after placing the display panel assembly on the carrier assembly, the clamping mechanism clamps each pulling part of the carrier film, and the clamping mechanism moves to pull each pulling part. Among them, the corner pulling part is pulled by the corner clamping component, and the corner pulling part of the carrier film deforms under the pulling force, and the deformation of the corner pulling part of the carrier film causes the corner part of the main body to deform. The corner part of the main body drives the corner of the display panel bonded to it to bend towards the back of the display panel, so that the corner of the display panel forms a curved surface structure. In this way, during the process of bending the edge of the display panel by the clamping mechanism, the stress concentration phenomenon at the corner of the display panel can be avoided, so as to improve the performance of the curved screen, improve the bonding effect of the curved screen, and form a curved screen with a "double-curved" shape in which the long sides, short sides and corners are all bent.

[0063] In a possible implementation, the curved screen includes a flat portion and curved portions connected to the side edges and corner portions of the flat portion.

[0064] By forming curved portions at the corner portions of the curved screen, a curved screen in an "octagonal curvature" form with both long sides, both short sides, and all corner portions being curved can be formed. Moreover, by forming curved portions at the corner portions of the display panel, during the process of bending the edges of the display panel, stress concentration at the corner portions of the display panel can be prevented, and the performance of the display panel and the fitting effect of the curved screen can be improved.

[0065] The fifth aspect of the present application provides an electronic device including the curved screen as described above.

[0066] The electronic device provided by the present application includes a curved screen. When fitting the curved screen, after attaching a carrier film with corner pulling portions to the back surface of the display panel and placing the display panel assembly on the carrier table assembly, each pulling portion of the carrier film is clamped by a clamping mechanism. The clamping mechanism moves to pull each pulling portion. Among them, the corner pulling portion is pulled by a corner clamping component. The corner pulling portion of the carrier film deforms under the action of the pulling force, and the deformation of the corner pulling portion of the carrier film causes the corner of the main body portion to deform. The corner of the main body portion drives the corner of the display panel bonded thereto to bend towards the back surface of the display panel, so that the corner of the display panel forms a curved surface structure. In this way, during the process of bending the edges of the display panel by the clamping mechanism, stress concentration at the corner portions of the display panel can be avoided, the performance of the curved screen can be improved, the fitting effect of the curved screen can be improved, and a curved screen in an "octagonal curvature" form with long sides, short sides, and corner portions all being curved can be formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 FIG. is a working schematic diagram of a fitting jig for a curved screen;

[0068] Figure 2 is Figure 1 a partial enlarged view of part A in

[0069] Figure 3 FIG. is a working schematic diagram of a fitting jig for a curved screen provided by an embodiment of the present application;

[0070] Figure 4 FIG. is a schematic structural diagram of a carrier film provided by an embodiment of the present application;

[0071] Figure 5 is Figure 3 a partial enlarged view of part B in

[0072] Figure 6 FIG. is a schematic diagram of the state where a clamping mechanism clamps a carrier film provided by an embodiment of the present application;

[0073] Figure 7 Structural schematic diagram of the carrier platform assembly provided by an embodiment of the present application;

[0074] Figure 8 Step flowchart of the fitting method for a curved screen provided by an embodiment of the present application;

[0075] Figure 9 Schematic diagram of the assembled state of the cover plate and the display panel assembly provided by an embodiment of the present application.

[0076] Explanation of reference numerals:

[0077] 1, 100 - fitting jig; 2 - display panel assembly; 3 - cover plate;

[0078] 101 - workbench; 102 - clamping mechanism; 1021 - clamping plate assembly;

[0079] 11 - carrier platform assembly; 12 - clamping mechanism; 12a - upper clamping plate; 12b - lower clamping plate;

[0080] 111 - base; 112 - buffer pad; 121 - corner clamping assembly; 122 - long - side clamping assembly; 123 - short - side clamping assembly;

[0081] 21 - display panel; 21a - flat area; 22 - carrier film;

[0082] 221 - main body part; 222 - pulling part; 223 - flattening section;

[0083] 2221 - corner pulling part; 2222 - long - side pulling part; 2223 - short - side pulling part;

[0084] 222a - deformation section; 222b - clamping section; a - long side; b - short side; c - corner; d - bending part. Detailed implementation manners

[0085] The terms used in the implementation manners part of the present application are only for explaining the specific embodiments of the present application, and are not intended to limit the present application.

[0086] With the development of science and technology, the screens of display devices such as mobile phones, televisions, tablet computers, and smart wearable devices have also undergone multiple upgrades. Not only is the resolution of the screen getting higher and higher, but the size of the screen is also less and less restricted. Moreover, with the improvement of the display effect of the screen, curved screens have gradually entered the public eye, and more and more display devices are equipped with curved screens.

[0087] Compared with a flat screen, a curved screen usually uses a flexible material as the substrate, which has good elasticity, is light in weight, is not easy to break, and reduces the wear probability of the screen. Moreover, the curved screen is more in line with the viewing angle of the human eye, can improve the sensory experience, and also has a better stereoscopic display effect. In addition, for smart wearable devices, the curved screen has a better fit due to its curvature and provides a more comfortable wearing experience; for handheld devices such as mobile phones and tablet computers, the curved screen with a curved design is more conducive to holding and has a higher sense of holding. Therefore, the application of curved screens in display devices is becoming more and more extensive.

[0088] The thickness of the curved screen is very thin, and the display panel of the curved screen is a flexible panel. Therefore, when manufacturing the curved screen, a flat display panel can be first manufactured, the side edges of the display panel are bent by a fitting fixture, and then a cover plate with a curved shape, such as a curved glass cover plate, is attached to the bent display panel to form a curved screen.

[0089] Figure 1 It is a working schematic diagram of a fitting fixture for a curved screen. Figure 2 is Figure 1 the partial enlarged view of part A in Figure 1 As shown, Figure 1 shows the workbench 101 and the clamping mechanism 102 of the fitting fixture 100, and other structures of the fitting fixture 100 are not shown. During operation, the display panel 21 is placed on the workbench 101 of the fitting fixture 100, the back surface of the display panel 21 is attached to the workbench 101, the front surface of the display panel 21 faces upward, and a carrier film 22 is attached to the back surface of the display panel 21. The carrier film 22 is clamped by the clamping mechanism 102, and the clamping mechanism 102 pulls the carrier film 22, and the carrier film 22 drives the side edges of the display panel 21 to bend. After the side edges of the display panel 21 are bent, a cover plate (not shown in the figure) is attached to the display panel 21, and the curved surfaces at the edges of the cover plate and the display panel 21 are attached to form a curved screen.

[0090] It should be noted that the front surface of the display panel 21 refers to the side surface of the display panel 21 used for light-emitting display. The cover plate covers the front surface of the display panel 21 to protect the display panel 21. The back surface of the display panel 21 is opposite to the front surface, and the carrier film 22 is arranged on the back surface of the display panel 21, and the carrier film 22 drives the side edges of the display panel 21 to bend towards its back surface.

[0091] Figure 1The clamping mechanism 102 of the shown laminating fixture 100 includes clamping plate assemblies 1021 corresponding to the four sides of the display panel 21 respectively. By clamping the carrier film 22 located on the corresponding side edges of the display panel 21 through each clamping plate assembly 1021, the corresponding side edges of the display panel 21 are bent. The four side edges of the display panel 21 are bent by the clamping plate assemblies 1021 located on the four sides of the display panel 21 to form a curved screen in a "quadruple-curved" shape.

[0092] In practical applications, clamping plate assemblies 1021 can also be correspondingly arranged only on the two long side edges of the display panel 21 to bend the two long side edges of the display panel 21, or clamping plate assemblies 1021 can be correspondingly arranged on the two short side edges of the display panel 21 to bend the two short side edges of the display panel 21 to form a curved screen in a "double-curved" shape.

[0093] However, referring to Figure 2 As shown, whether it is a curved screen in a "quadruple-curved" shape or a curved screen in a "double-curved" shape, during the process of the clamping mechanism 102 pulling the carrier film 22 to bend the side edges of the display panel 21, since the material on the side edges of the display panel 21 flows towards the bending direction, changing the flattened state of the material, the material near the end of the side edges of the display panel 21 will accumulate at the corners of the display panel 21. Especially for the display panel 21 in a "quadruple-curved" shape, the materials at the ends of the adjacent side edges of the display panel 21 both accumulate at the corners, and wrinkles and sharp corners are likely to form at the corners of the bent display panel 21.

[0094] The wrinkles and sharp corners at the corners of the display panel 21 are detrimental to the flatness of the corners. The wrinkles and sharp corners cause local areas at the corners of the display panel 21 to bulge above the front surface of the display panel 21. When the display panel 21 and the cover plate are laminated, the corners of the display panel 21 are extremely likely to come into contact with the cover plate in advance, and then the flat surface area 21a of the display panel 21 contacts the cover plate. In this way, it is not conducive to discharging the air between the cover plate and the display panel 21, and air bubble areas are likely to appear between the cover plate and the display panel 21 after lamination, affecting the lamination effect of the curved screen.

[0095] Moreover, when the display panel 21 and the cover plate are laminated, the pressure of the cover plate on the display panel 21 acts on the corners of the display panel 21, and stress concentration is likely to occur at the corners of the display panel 21. As the pressure increases, the stress at the corners of the display panel 21 spreads to the surrounding areas, which will affect the performance of the surrounding areas of the corners of the display panel 21. For example, it affects the structural strength, display effect and other performances of the surrounding areas of the corners of the display panel 21.

[0096] In view of this, the embodiments of the present application provide a fitting jig for a curved screen, a fitting method, a curved screen, and an electronic device. The fitting jig for the curved screen is provided with corner clamping components corresponding to the corners of the display panel. When fitting, a corner pulling part corresponding to the corners of the display panel is cooperatively arranged on the carrier film. The corner clamping components drive the corner pulling part to deform, so that the corners of the display panel are bent, thereby reducing the stress concentration phenomenon at the corners of the display panel, improving the performance of the curved screen, and improving the fitting effect of the curved screen.

[0097] Embodiment 1

[0098] Figure 3 It is a working schematic diagram of the fitting jig for the curved screen provided by the embodiment of the present application. Refer to Figure 3 As shown, this embodiment provides a fitting jig for a curved screen (hereinafter referred to as the fitting jig). The fitting jig 1 includes a carrier table assembly 11, a clamping mechanism 12, and a driving mechanism (not shown in the figure). When fitting the curved screen, the display panel assembly 2 is placed on the carrier table assembly 11, the clamping mechanism 12 clamps the display panel assembly 2, and the driving mechanism drives the clamping mechanism 12 to move, so as to pull the display panel assembly 2 to deform through the clamping mechanism 12.

[0099] It should be noted that the curved screen includes a display panel 21 and a cover plate (not shown in the figure), and the cover plate is attached to the front surface of the display panel 21. When fitting the curved screen, first, the edge of the display panel 21 is bent by the fitting jig 1 to form a display panel 21 with a curved edge. Then, the cover plate is attached to the display panel 21 to form a curved screen. Among them, the cover plate is a curved cover plate with a curved edge. For example, the cover plate is a curved glass cover plate, and the cover plate can be formed by processes such as drawing, rolling, or casting.

[0100] When bending the edge of the display panel 21, a carrier film 22 is attached to the back surface of the display panel 21 to form the display panel assembly 2. By pulling the carrier film 22, the edge of the display panel 21 is driven to deform and bend, so as to form a display panel 21 with a curved edge. After bending the edge of the display panel 21 and attaching the cover plate to the front surface of the display panel 21, the carrier film 22 attached to the back surface of the display panel 21 is removed to form a curved screen.

[0101] Among them, as described above, the front surface of the display panel 21 is the surface on which it emits light and displays, and the back surface of the display panel 21 is the surface opposite to its front surface, which will not be elaborated here.

[0102] The fitting jig 1 will be described in detail below in conjunction with the display panel assembly 2.

[0103] Refer to Figure 3As shown, the carrier platform assembly 11 of the fitting fixture 1 can be installed on the ground, for example. The bottom surface of the carrier platform assembly 11 faces the ground, the top surface of the carrier platform assembly 11 faces upward, and the top surface of the carrier platform assembly 11 is its bearing surface. During operation, the back surface of the display panel assembly 2 is attached to the bearing surface of the carrier platform assembly 11, that is, the bearing film 22 faces the bearing surface, the front surface of the display panel 21 faces upward, and the clamping mechanism 12 pulls the bearing film 22 to drive the edge of the display panel 21 to bend towards its back surface.

[0104] By attaching the surface of the display panel assembly 2 where the bearing film 22 is provided to the bearing surface of the carrier platform assembly 11, making the front surface of the display panel 21 face upward, after the edge of the display panel 21 is bent in place, the display panel assembly 2 can be fixed to the bearing surface. Since the upward surface of the display panel assembly 2 is the front surface of the display panel 21, the cover plate can be placed directly above the display panel 21, and the fitting of the cover plate and the display panel 21 can be completed using the fitting fixture 1.

[0105] Figure 4 It is a schematic structural diagram of the bearing film provided by the embodiment of the present application. Refer to Figure 4 As shown, the bearing film 22 attached to the back surface of the display panel 21 includes a main body portion 221 and a plurality of pulling portions 222 connected to the periphery of the main body portion 221. The shape and size of the main body portion 221 of the bearing film 22 match the shape and size of the display panel 21. The main body portion 221 is attached to the back surface of the display panel 21, and the pulling portions 222 of the bearing film 22 are located outside the main body portion 221, and the pulling portions 222 extend out of the display panel 21.

[0106] Combined with Figure 3 As shown, the clamping mechanism 12 of the fitting fixture 1 clamps the pulling portions 222 of the bearing film 22 that extend out of the display panel 21. By driving the clamping mechanism 12 to move through the driving mechanism, the clamping mechanism 12 pulls the pulling portions 222 of the bearing film 22 to deform. The pulling portions 222 drive the main body portion 221 of the bearing film 22 to deform, and the main body portion 221 drives the edge of the display panel 21 bonded thereto to bend and deform.

[0107] It should be noted that the bearing film 22 can be a whole-layer film structure to ensure that during the process of the clamping mechanism 12 pulling the bearing film 22, the bearing film 22 has sufficient strength and toughness and will not be torn or broken, ensuring that the bearing film 22 can drive the display panel 21 to deform and bend. In practical applications, tools such as knives can be used to cut along the periphery of the bearing film 22 to separate the bearing film 22 into a main body portion 221 and pulling portions 222 located on the periphery of the main body portion 221. Among them, a plurality of pulling portions 222 can be cut along the periphery of the bearing film 22.

[0108] In addition, the surface area of the bearing surface of the carrier stage assembly 11 may be slightly smaller than the surface area of the display panel 21. The display panel 21 can completely cover the bearing surface, and the edges of the display panel 21 extend beyond the bearing surface for one week. Correspondingly, the edges of the main body portion 221 of the bearing film 22 extend beyond the bearing surface for one week. Thus, when the clamping mechanism 12 pulls the pulling portion 222 of the bearing film 22 to move, the deformation of the pulling portion 222 of the bearing film 22 drives the deformation of the edges of the main body portion 221, and the edges of the main body portion 221 drive the edges of the display panel 21 that is bonded thereto and has a suspended edge to bend, so as to form a curved display panel 21 with a curved edge.

[0109] Taking the screen of a display device such as a mobile phone, a tablet computer, a television, or a smart wearable device as an example, the planar shape of the screen is usually a rectangular shape. The screen includes the side edges on four sides and the corner portions formed at the intersections of adjacent side edges. Specifically, taking the planar shape of the screen as a rectangle as an example, the screen includes two long sides a arranged oppositely and two short sides b arranged oppositely. The short sides b are connected between the opposite ends of the two long sides a, and the intersections of the long sides a and the short sides b form the corner portions c of the screen. Among them, the display panel 21 and the cover plate of the screen both include two long sides a, two short sides b, and four corner portions c.

[0110] In order to realize the bending of the side edges of the display panel 21, that is, to form a "four-curved" curved screen, referring to Figure 4 As shown, among the multiple pulling portions 222 extending out of the main body portion 221 in the bearing film 22, there are four side-edge pulling portions, and each side-edge pulling portion is respectively connected to each side edge of the main body portion 221. Taking the shape of the main body portion 221 as a rectangle as an example, the four side-edge pulling portions include two long-side pulling portions 2222 and two short-side pulling portions 2223. The two long-side pulling portions 2222 are respectively connected to the two long sides a of the main body portion 221, and the two short-side pulling portions 2223 are respectively connected to the two short sides b of the main body portion 221. That is to say, the two long-side pulling portions 2222 on both sides correspond to the two long sides a of the display panel 21, and the two short-side pulling portions 2223 on both sides correspond to the two short sides b of the display panel 21.

[0111] Referring to Figure 3 As shown, corresponding to the long-side pulling portion 2222 and the short-side pulling portion 2223 of the bearing film 22, the clamping mechanism 12 includes a long-side clamping assembly 122 and a short-side clamping assembly 123. The long-side clamping assembly 122 is correspondingly located outside the long side a of the display panel assembly 2, and the short-side clamping assembly 123 is correspondingly located outside the short side b of the display panel assembly 2. When the bonding fixture 1 works, the long-side clamping assembly 122 clamps the long-side pulling portion 2222 of the bearing film 22, and the short-side clamping assembly 123 clamps the short-side pulling portion 2223 of the bearing film 22.

[0112] Corresponding to the two long sides a of the display panel 21, the clamping mechanism 12 may have two sets of long-side clamping components 122, and the two sets of long-side clamping components 122 are respectively located outside the two long sides a of the display panel assembly 2. By driving the two sets of long-side clamping components 122 to move, the long-side pulling parts 2222 located on the opposite sides of the main body 221 of the carrier film 22 are respectively pulled, and the long-side pulling parts 2222 on both sides are deformed, causing the parts of the main body 221 near the two long sides a to be deformed, and the main body 221 drives the two long sides a of the display panel 21 adhered thereto to bend.

[0113] Similarly, corresponding to the two short sides b of the display panel 21, the clamping mechanism 12 may have two sets of short-side clamping components 123, and the two sets of short-side clamping components 123 are respectively located outside the two short sides b of the display panel assembly 2. By driving the two sets of short-side clamping components 123 to move, the short-side pulling parts 2223 located on the opposite sides of the main body 221 of the carrier film 22 are respectively pulled, and the short-side pulling parts 2223 on both sides are deformed, causing the parts of the main body 221 near the two short sides b to be deformed, and the main body 221 drives the two short sides b of the display panel 21 adhered thereto to bend.

[0114] During the process of driving the long-side pulling parts 2222 on both sides of the main body 221 of the carrier film 22 and the short-side pulling parts 2223 on both sides by the long-side clamping components 122 on both sides and the short-side clamping components 123 on both sides to clamp and pull, respectively, and driving the two long sides a and the two short sides b of the display panel 21 to bend, in order to prevent the corners c of the display panel 21 from wrinkling or forming sharp corners, as shown in Figure 3 and Figure 4 Among the multiple pulling parts 222 of the carrier film 22, there are also corner pulling parts 2221 connected to the respective corners c of the main body 221. Correspondingly, the clamping mechanism 12 further includes corner clamping components 121 corresponding to the respective corners c of the display panel assembly 2. The corner clamping components 121 are used to clamp the corner pulling parts 2221 of the carrier film 22 so that the corners c of the display panel 21 are bent.

[0115] By clamping the corner pulling parts 2221 of the carrier film 22 with the corner clamping components 121, driving the corner clamping components 121 to move by the driving mechanism, the corner clamping components 121 pull the corner pulling parts 2221 of the carrier film 22, the corner pulling parts 2221 of the carrier film 22 are deformed, causing the parts of the main body 221 near the corners c to be deformed, and the main body 221 drives the respective corners c of the display panel 21 adhered thereto to bend.

[0116] Figure 5 For Figure 3 the partial enlarged view at B in Figure 5As shown, by bending each corner c of the display panel 21 towards its back surface, the material in the corner c area of the display panel 21 flows in the bending direction. Due to the pulling force of the carrier film 22 on the corner c of the display panel 21, the corner c of the display panel 21 deforms. The corner c of the display panel 21 bends synchronously with the long side a and the short side b, which can prevent wrinkles or sharp corners from appearing at the corner c of the display panel 21, avoid stress concentration at the corner c of the display panel 21, so as not to affect the performance of the display panel 21. Moreover, when the display panel 21 is attached to the cover plate, the corner c of the display panel 21 will not come into contact with the cover plate in advance, which can prevent the appearance of bubble areas between the cover plate and the display panel 21 after attachment, and improve the attachment effect of the curved screen.

[0117] In addition, by pulling the corner pulling part 2221 of the carrier film 22 through the corner clamping component 121, the corner c of the display panel 21 is driven to bend towards its back surface, and a curved surface structure is formed at each corner c of the display panel 21. In this way, not only the two long sides a and the two short sides b of the display panel 21 form a curved surface structure, but also the corner c of the display panel 21 forms a curved surface structure. The two long sides a, the two short sides b and each corner c of the display panel 21 are all curved surfaces. Correspondingly, the two long sides a, the two short sides b and each corner c of the cover plate are also all curved surfaces. Furthermore, a curved screen in the "eight-curve" form can be formed.

[0118] Among them, by way of example, taking the case of attaching the cover plate to the display panel 21 by a rolling method, after the cover plate is correctly aligned and covered on the display panel 21, since the corner c of the display panel 21 bends towards its back surface, the cover plate and each part of the display panel 21 are in planar contact, and the gap between the cover plate and the display panel 21 is uniform. Then, the roller is pressed on the cover plate. For example, the roller is first clamped in the middle area of the cover plate, and the roller moves from the middle area of the cover plate to the two side areas to discharge the bubbles between the cover plate and the display panel 21, realizing the attachment of the cover plate to the display panel 21.

[0119] It should be understood that the surface of the cover plate on the side connected to the display panel 21 can be coated with an adhesive. When rolling the cover plate, the bubbles between the cover plate and the display panel 21 are discharged, and the adhesive is extruded onto the display panel 21, and the cover plate and the display panel 21 are bonded together through the adhesive.

[0120] Refer to Figure 3As shown, since the front side of the display panel 21 is placed face up on the carrier assembly 11, and the clamping mechanism 12 clamps the pulling portion 222 of the carrier film 22 and moves it in a direction away from the front side of the display panel 21, so as to bend the edge of the display panel 21 towards its back side. Therefore, the long-side clamping assembly 122, the short-side clamping assembly 123 and the corner clamping assembly 121 in the clamping mechanism 12 generally surround the carrier assembly 11 and are located in the middle area in the thickness direction of the carrier assembly 11, so as to provide a pre-inclination angle for the pulling portion 222 of the carrier film 22 to move and deform away from the front side of the display panel 21.

[0121] Moreover, the clamping mechanism 12 can move towards or away from the carrier assembly 11 in a direction parallel to the bearing surface. Taking the long-side clamping assembly 122 in the clamping mechanism 12 as an example, when the long-side clamping assembly 122 moves away from the carrier assembly 11, the pulling force of the long-side clamping assembly 122 on the long-side pulling portion 2222 of the carrier film 22 increases, and the acting force of the carrier film 22 on the display panel 21 increases, so as to drive the display panel 21 to bend through the carrier film 22.

[0122] At the same time, the clamping mechanism 12 can move up and down in a direction perpendicular to the bearing surface of the carrier assembly 11. By adjusting the moving distance of the clamping mechanism 12 in a direction parallel to the bearing surface and the moving distance in a direction perpendicular to the bearing surface, the bending angle of the display panel 21 can be regulated. Continuing to take the long-side clamping assembly 122 as an example, if the long-side clamping assembly 122 is arranged close to the carrier assembly 11 in a direction parallel to the bearing surface, by moving the long-side clamping assembly 122 away from the display panel assembly 2 in a direction perpendicular to the bearing surface, as the pulling force of the long-side clamping assembly 122 on the long-side pulling portion 2222 of the carrier film 22 increases, the bending degree of the long side a of the display panel 21 increases.

[0123] Exemplarily, in this embodiment, by regulating the moving distances of the clamping mechanism 12 in directions parallel and perpendicular to the bearing surface of the carrier assembly 11, the bending angle of the edge of the display panel 21 can reach 90°.

[0124] In order to achieve independent control of the long-side clamping assemblies 122 on both sides, the short-side clamping assemblies 123 on both sides and each corner clamping assembly 121, and facilitate separately regulating the moving directions and deformation degrees of the pulling portions 222 of the carrier film 22, so as to more precisely regulate the bending deformation of the edge of the display panel 21, the driving mechanism can include a plurality of driving components (not shown in the figure), and each driving component is respectively used to drive each corner clamping assembly 121, long-side clamping assembly 122 and short-side clamping assembly 123.

[0125] Each driving component is connected to each clamping component of each clamping mechanism 12. Each driving component individually drives each clamping component to move, and respectively adjusts the bending deformation of each side and each corner c of the display panel 21 through the movement of each clamping component, ensuring that each side and each corner c of the display panel 21 are bent in place.

[0126] Exemplarily, the driving mechanism can be a servo mechanism, each driving component can be a servo motor, and each servo motor is respectively connected to each long-side clamping component 122, each short-side clamping component 123, and each corner clamping component 121, and drives each clamping component to move through each servo motor.

[0127] Figure 6 Schematic diagram of the state where the clamping mechanism provided by the embodiment of the present application clamps the carrier film. Refer to Figure 6 As shown, in order to facilitate showing the state where the clamping mechanism 12 drives the carrier film 22 to move and deform, the carrier table component 11 of the bonding jig 1 and the display panel 21 in the display panel assembly 2 are hidden in the figure. Each long-side clamping component 122, short-side clamping component 123, and corner clamping component 121 all include an upper clamping plate 12a and a lower clamping plate 12b. The upper clamping plate 12a and the lower clamping plate 12b are opposed to each other, and each pulling portion 222 of the carrier film 22 is correspondingly located between the upper clamping plate 12a and the lower clamping plate 12b of each clamping component, and the pulling portion 222 is clamped by the upper clamping plate 12a and the lower clamping plate 12b.

[0128] When the clamping mechanism 12 works, before clamping the carrier film 22, the upper clamping plate 12a and the lower clamping plate 12b of each clamping component can be in an open state, and a certain operating space is reserved between the upper clamping plate 12a and the lower clamping plate 12b to facilitate the operator to place the pulling portion 222 of the carrier film 22 between the upper clamping plate 12a and the lower clamping plate 12b. For example, if the carrier film 22 is a film material with adhesiveness, the carrier film 22 can be adhered to the upper clamping plate 12a or the lower clamping plate 12b. After the pulling portion 222 of the carrier film 22 is placed in place, the driving mechanism can be used to drive the upper clamping plate 12a and the lower clamping plate 12b to close, and the pulling portion 222 of the carrier film 22 is clamped between the upper clamping plate 12a and the lower clamping plate 12b.

[0129] Combined with Figure 4 As shown, each pulling portion 222 of the carrier film 22 includes a deformation section 222a and a clamping section 222b. The deformation section 222a is located between the edge of the main body portion 221 and the clamping section 222b. The clamping component clamps the clamping section 222b of the pulling portion 222, and the clamping section 222b is clamped between the upper clamping plate 12a and the lower clamping plate 12b. When the clamping component moves, it pulls the deformation section 222a of the pulling portion 222 to deform, and the deformation section 222a drives the edge portion of the main body portion 221 to deform, thereby driving the edge portion of the display panel to bend.

[0130] Referring to Figure 6 As shown, in this embodiment, each corner clamping component 121 of the laminating jig 1 can be arranged facing the protruding direction of each corner c of the display panel assembly 2. In this way, when the corner clamping component 121 moves closer to or away from the carrier table component 11 in the horizontal direction of the bearing surface of the carrier table component 11, or when the corner clamping component 121 moves up and down in the direction perpendicular to the bearing surface, the acting force of the corner clamping component 121 on the corner pulling part 2221 of the bearing film 22 is concentrated on the center of the corner c of the main body part 221 of the bearing film 22. During the process that the main body part 221 of the bearing film 22 drives the corner c of the display panel 21 to bend, the deformation of each area of the corner c of the display panel 21 is relatively uniform, and the thickness of each area of the curved surface structure formed by the corner c is uniform and the flatness is good.

[0131] Taking one of the corners c of the display panel assembly 2 as an example, if the corner clamping component 121 is biased towards the long side a or the short side b adjacent to the corner c, the corner clamping component 121 drives the corner pulling part 2221 of the bearing film 22 to move towards the direction biased towards the long side a or the short side b, which will cause the forces acting on each area of the corner c of the main body part 221 of the bearing film 22 by the corner clamping component 121 to be unbalanced. Furthermore, it will cause the thickness of each circumferential area of the corner c of the display panel 21 to be inconsistent and the surface to be uneven.

[0132] Referring to Figure 5 As shown, from the side close to the planar area 21a of the display panel 21 to the edge of the display panel 21, the corner c of the display panel 21 is an outward-expanded fan-shaped area. Correspondingly, the corner c of the main body part 221 of the bearing film 22 is also in an outward-expanded fan shape from the inside to the outside. The corner pulling part 2221 connected to the corner c of the main body part 221, since it needs to connect each area of the corner c of the main body part 221, and the corner pulling part 2221 should be able to evenly and dispersedly transfer the acting force to each area of the corner c of the main body part 221. Therefore, from the end where the corner pulling part 2221 is connected to the main body part 221 to the clamped part of the corner pulling part 2221, the width of the corner pulling part 2221 gradually increases.

[0133] Combined with Figure 6 As shown, since the width of each part of the corner pulling part 2221 of the bearing film 22 gradually changes in the extending direction of the corner pulling part 2221, in order to make the pulling force of the corner clamping component 121 on the corner pulling part 2221 act evenly on each area in the width direction of the corner pulling part 2221, so that the acting force is evenly transferred to each area of the corner c of the main body part 221, the clamping end of the corner clamping component 121 (the end of the corner clamping component 121 facing the carrier table component 11) should be able to completely cover the clamped part of the corner pulling part 2221.

[0134] Referring to Figure 4 As shown, the deformed section 222a of the corner pulling part 2221 of the carrier film 22 gradually increases in width from one end connected to the corner c of the main body part 221 to the other end. The deformed section 222a of the corner pulling part 2221 has an outwardly expanding conical structure to match the corner c of the fan-shaped main body part 221, and can evenly transfer the pulling force of the corner clamping assembly 121 to each area of the corner c of the main body part 221.

[0135] In addition, the shape of the clamping section 222b of the corner pulling part 2221 can be rectangular. In the extending direction of the corner pulling part 2221, the width of the clamping section 222b of the corner pulling part 2221 is consistent with the width of the end where the deformed section 222a is connected to it. The clamping end of the corner clamping assembly 121 can be clamped at the connecting part between the clamping section 222b and the deformed section 222a, and the clamping section 222b is clamped between the upper clamping plate 12a and the lower clamping plate 12b of the corner clamping assembly 121.

[0136] Continuing to refer to Figure 4 As shown, for the side pulling part of the carrier film 22, for example, the deformed section 222a of the long side pulling part 2222 and the short side pulling part 2223 of the carrier film 22 gradually decreases in width from one end connected to the side of the main body part 221 to the other end. The width of the deformed section 222a (the width of the deformed section 222a extending along the extension direction of the long side / short side of the main body part 221) can gradually decrease. In this way, the gap between the deformed section 222a of the side pulling part and the deformed section 222a of the adjacent corner pulling part 2221 gradually expands. Thus, there is a relatively large spacing between the clamping section 222b of the side pulling part and the clamping section 222b of the adjacent corner pulling part 2221, forming an avoidance space, which can reserve sufficient clamping space for the adjacent side clamping assembly and corner clamping assembly, ensuring the smooth movement of each clamping assembly.

[0137] In addition, for the deformed section 222a of the side pulling part from one end connected to the main body part 221 to the other end, by gradually reducing its width, the width of the deformed section 222a of the side pulling part gradually and smoothly decreases and transitions to the clamping section 222b, so that the acting force of the clamping assembly is evenly transferred to each area of the side of the main body part 221. Avoid the occurrence of width mutation areas in the deformed section 222a of the side pulling part, so as not to affect the strength of the deformed section 222a of the side pulling part and prevent the deformed section 222a from being torn or broken during the pulling process.

[0138] Exemplarily, the shape of the clamping section 222b of the side pulling part can be rectangular, which is convenient for the side clamping assembly to clamp. Among them, the clamping end of the side clamping assembly can clamp at the connection part between the clamping section 222b and the deformation section 222a of the side pulling part, and the clamping section 222b of the side pulling part is clamped between the upper clamping plate 12a and the lower clamping plate 12b of the side clamping assembly.

[0139] Figure 7 This is a schematic structural diagram of the carrier platform assembly provided by the embodiment of the present application. Refer to Figure 7 As shown, the carrier platform assembly 11 may include a base 111 and a buffer pad 112 disposed on the base 111. The base 111 may be a rigid structural member. For example, the material of the base 111 may be stainless steel, iron, epoxy resin, or organic resin, etc. The base 111 can withstand the pressure on the carrier platform assembly 11 during work, including the pressure of the display panel assembly 2 on the carrier platform assembly 11 when the clamping mechanism 12 drives the deformation of the pulling part 222 of the carrier film 22, and the pressure on the carrier platform assembly 11 when the cover plate is attached to the display panel assembly 2.

[0140] The buffer pad 112 is used to buffer the pressure borne by the display panel assembly 2. For example, during the process of the clamping mechanism 12 bending the edge of the display panel 21 and during the process of attaching the cover plate to the display panel assembly 2, the buffer pad 112 can buffer the pressure of the display panel assembly 2 on the carrier platform assembly 11, weaken the acting force borne by the display panel assembly 2, protect the display panel 21 from damage, and ensure the reliability of the bonding fixture 1. Exemplarily, the buffer pad 112 can be a rubber pad or a silica gel pad.

[0141] Embodiment 2

[0142] This embodiment provides a method for attaching a curved screen. This attaching method uses the curved screen attaching fixture 1 described in Embodiment 1 and combines with the display panel assembly 2 described in Embodiment 1 to attach and form a curved screen.

[0143] Figure 8 This is a step flow chart of the method for attaching a curved screen provided by the embodiment of the present application. Refer to Figure 8 As shown, the method for attaching a curved screen includes the following steps:

[0144] S100. Attach a carrier film to the back surface of the display panel to form a display panel assembly; wherein, the carrier film includes a main body part and a plurality of pulling parts connected to the periphery of the main body part. The main body part covers the display panel, and the pulling parts extend outside the display panel. The pulling parts include corner pulling parts connected to the corner c of the main body part.

[0145] First, attach a carrier film 22 to the back of the display panel 21. The display panel 21 and the carrier film 22 together form a display panel assembly 2, so as to facilitate subsequent pulling of the carrier film 22 through a fitting jig 1, and drive the edge of the display panel 21 to bend through the deformation of the carrier film 22.

[0146] Among them, the carrier film 22 includes a main body portion 221 and a plurality of pulling portions 222 connected to the periphery of the main body portion 221. The shape of the main body portion 221 matches the shape of the display panel 21, and the pulling portions 222 extend outside the display panel 21. The pulling portions 222 include long-side pulling portions 2222, short-side pulling portions 2223, and corner pulling portions 2221. Long-side pulling portions 2222 are connected to both long sides a of the main body portion 221 of the carrier film 22, short-side pulling portions 2223 are connected to both short sides b of the main body portion 221, and corner pulling portions 2221 are connected to each corner c of the main body portion 221.

[0147] Combined Figure 4 and Figure 5 As shown, in order to make the forces on each circumferential region of the corner pulling portion 2221 of the carrier film 22 more balanced, the corner c of the main body portion 221 of the carrier film 22 and the connected corner pulling portion 2221 can be divided into at least two flattened sections 223 along the circumference of the corner c of the main body portion 221 in advance, so as to facilitate the subsequent pulling of the corner pulling portion 2221, and distribute the redundancy of the corner c of the main body portion 221 to each flattened section 223, so as to avoid the local area of the corner c of the main body portion 221 from bulging, and prevent the corner c of the main body portion 221 from affecting the bending state of the corner c of the display panel 21, so as to form a curved surface structure with uniform thickness and smooth surface at the corner c of the display panel 21.

[0148] Exemplarily, the corner c of the main body portion 221 of the carrier film 22 and the corner pulling portion 2221 can be jointly divided to form two flattened sections 223. One flattened section 223 is biased towards the long side a adjacent to the corner c, and the other flattened section 223 is biased towards the short side b adjacent to the corner c. Or, the corner c of the main body portion 221 and the corner pulling portion 2221 can be jointly divided to form three flattened sections 223. The two flattened sections 223 on both sides are respectively biased towards the long side a and the short side b on both sides of the corner c, and the middle flattened section 223 is directly opposite to the protruding direction of the corner c of the main body portion 221. Or, the corner c of the main body portion 221 and the corner pulling portion 2221 can also be jointly divided to form four, five or six flattened sections 223, etc. This embodiment does not make specific limitations on this.

[0149] In addition, referring to Figure 4As shown, the angles of the central angles of the connection parts between the flattened sections 223 and the main body 221 can be the same, so as to divide the corner c of the main body 221 into multiple fan-shaped areas with equal areas, which can improve the balance of the pulling force of the corner clamping assembly 121 on each flattened section 223 and enhance the bending effect of the corner c of the display panel 21.

[0150] It should be noted that the size and quantity of the flattened sections 223 can be designed according to the performance parameters such as the strength and toughness of the carrier film 22 to ensure that each flattened section 223 has sufficient strength to prevent the flattened section 223 from tearing or even breaking during the process of the corner clamping assembly 121 pulling the corner pulling part 2221.

[0151] Exemplarily, the carrier film 22 can be a gelatinous layer. The carrier film 22 adheres to the back surface of the display panel 21 by its own adhesiveness, and the properties of the carrier film 22 facilitate its subsequent removal from the back surface of the display panel 21.

[0152] S200. Place the display panel assembly on the carrier table assembly, make the carrier film face the carrier table assembly, and clamp each pulling part on the clamping mechanism.

[0153] Combined with Figure 3 As shown, after the display panel assembly 2 is manufactured, place the display panel assembly 2 on the carrier table assembly 11 of the laminating jig 1. Among them, the side of the display panel assembly 2 with the carrier film 22 attached faces the bearing surface of the carrier table assembly 11, the carrier film 22 is attached to the bearing surface, and the front side of the display panel 21 faces upward.

[0154] After the display panel assembly 2 is placed, clamp each pulling part 222 of the carrier film 22 on the clamping mechanism 12 of the laminating jig 1.

[0155] Among them, the clamping mechanism 12 includes multiple groups of clamping assemblies. The clamping assembly includes a long-side clamping assembly 122, a short-side clamping assembly 123, and a corner clamping assembly 121. One group of long-side clamping assemblies 122 is provided on the outside of each of the two long sides a of the display panel assembly 2, one group of short-side clamping assemblies 123 is provided on the outside of each of the two short sides b of the display panel assembly 2, and a corner clamping assembly 121 is correspondingly arranged on the outside of each corner c of the display panel assembly 2.

[0156] The long-side pulling parts 2222 on both sides of the carrier film 22 are respectively clamped on the two long-side clamping assemblies 122 on both sides, the short-side pulling parts 2223 on both sides of the carrier film 22 are respectively clamped on the two short-side clamping assemblies 123 on both sides, and the corner pulling parts 2221 at each corner c of the carrier film 22 are respectively clamped on each corner clamping assembly 121.

[0157] As described in the first embodiment, in the extending direction of the corner pulling part 2221, from the end connected to the main body part 221 to the clamped part thereof, the width of the corner pulling part 2221 gradually increases. In order to ensure the balance of the acting forces of the corner clamping assembly 121 on each area of the corner c of the main body part 221, the clamping end of the corner clamping assembly 121 should completely cover the clamped part of the corner pulling part 2221, and each area in the width direction of the clamped part of the corner pulling part 2221 is clamped by the corner clamping assembly 121, ensuring that each area in the circumferential direction of the corner pulling part 2221 is in a tensioned state. The corner pulling part 2221 drives each area in the circumferential direction of the corner c of the main body part 221 to bend by a substantially equal amplitude, ensuring the bending effect of the corner c of the display panel 21.

[0158] Taking the corner pulling part 2221 including a plurality of flattened sections 223 formed by dividing along its width direction as an example, after placing the display panel assembly 2, move the position of the corner clamping assembly 121 so that each flattened section 223 is clamped on the corner clamping assembly 121. For the clamped part of the corner pulling part 2221, the entire width area of each flattened section 223 is clamped on the corner clamping assembly 121.

[0159] S300. Control the clamping mechanism to move and pull the pulling part, driving the edge of the display panel to bend towards the direction of the carrier table assembly.

[0160] After clamping each pulling part 222 on the carrier film 22 of the display panel assembly 2 to the corresponding clamping assemblies, drive each clamping assembly to move through the driving mechanism of the bonding fixture 1. Exemplarily, the driving mechanism drives each clamping assembly to move towards or away from the carrier table assembly 11 along a direction parallel to the bearing surface of the carrier table assembly 11, and / or the driving mechanism drives each clamping assembly to move up and down along a direction perpendicular to the bearing surface of the carrier table assembly 11.

[0161] Each clamping assembly moves to respectively pull each pulling part 222. The pulling part 222 deforms under the action of the pulling force of the clamping assembly. The deformation of the pulling part 222 causes the deformation of the main body part 221, and the main body part 221 drives the edge of the display panel 21 bonded thereto to bend towards the direction of the carrier table assembly 11. Among them, the long side pulling part 2222 drives the long side a of the display panel 21 to bend, the short side pulling part 2223 drives the short side b of the display panel 21 to bend, and the corner pulling part 2221 drives the corner c of the display panel 21 to bend.

[0162] As described in the foregoing Embodiment 1, each corner clamping component 121 drives the deformation of each corner pulling part 2221 respectively, and further drives the bending of each corner c of the display panel 21. By deforming and bending the corner c of the display panel 21, it is possible to avoid the formation of wrinkles or sharp corners at the corner c of the display panel 21, avoid stress concentration at the corner c of the display panel 21, prevent the performance of the display panel 21 from being affected, and avoid the cover plate coming into contact with the corner c of the display panel 21 first during subsequent bonding of the cover plate, so as to avoid the appearance of a bubble area between the bonded cover plate and the display panel 21, and improve the bonding effect of the curved screen.

[0163] Moreover, each corner clamping component 121 pulls each corner pulling part 2221 to form a curved surface structure at each corner c of the display panel 21. Further, curved surface structures are formed on both long sides a and both short sides b of the display panel 21 and each corner c, and a curved screen in an "octa-curved" form can be formed.

[0164] S400. When the bending radian of the edge of the display panel reaches the preset radian, control the clamping mechanism to stop moving, and bond the cover plate to the front surface of the display panel.

[0165] Figure 9 It is a schematic diagram of the assembled state of the cover plate and the display panel assembly provided by the embodiment of the present application. Refer to Figure 9 As shown, the clamping mechanism 12 drives the bending of the edge of the display panel 21 through the carrier film 22. After the bending radian reaches the preset radian, the driving mechanism controls the clamping mechanism 12 to stop at the current position. Then, the cover plate 3 is covered on the display panel assembly 2 from directly above the display panel assembly 2, and the cover plate 3 is bonded to the display panel assembly 2 through the bonding fixture 1.

[0166] It should be noted that the preset radian of the bending of the display panel can be set according to design requirements so that the bent display panel meets the design requirements of the curved screen. This embodiment does not specifically limit the preset radian.

[0167] Among them, an adhesive can be provided on the surface of the cover plate 3 facing the display panel assembly 2, and the cover plate 3 can be bonded to the display panel assembly 2 through the adhesive by means of rolling. Since the display panel 21 in the display panel assembly 2 faces upward, the cover plate 3 can be bonded to the front surface of the display panel 21.

[0168] In practical applications, after the display panel 21 is bent to a preset radian, the bending degree of the edge of the display panel 21 can be slightly greater than the radian of the curved surface structure of the edge of the cover plate 3. For example, the curved surface radian of the edge of the cover plate 3 is 60°, while the preset radian of the edge of the display panel 21, that is, the radian after being bent in place, is 62°. In this way, after the cover plate 3 is attached, the clamping mechanism 12 is removed, and the bending degree of the edge of the display panel 21 rebounds slightly, so that the edge of the display panel 21 fits tightly with the edge of the cover plate 3.

[0169] After the cover plate 3 is attached to the front surface of the display panel 21, it further includes: moving the assembled cover plate 3 and display panel 2 from the carrier assembly 11, and then removing the carrier film 22 attached to the back surface of the display panel 21 to form a curved screen. Taking the carrier film 22 as a photosensitive glue material as an example, the carrier film 22 can be removed through processes such as exposure and development; or, for the carrier film 22 made of a material that can be dissolved by certain chemical agents, the carrier film 22 can be dissolved by the corresponding chemical agents.

[0170] Embodiment III

[0171] This embodiment provides an electronic device, which can be a mobile terminal or a fixed terminal with a curved screen such as a mobile phone, a smart wearable device, a television, a desktop computer, a laptop, a tablet (Table), an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a driving recorder, and a security device.

[0172] Among them, the curved screen of the electronic device is made by the bonding method described in Embodiment II above and using the bonding jig 1 described in Embodiment I above.

[0173] The curved screen includes a flat portion and curved portions connected to the respective sides and corners of the flat portion. Taking the flat shape of the curved screen as a rectangle, specifically taking the flat shape of the curved screen as a rectangle, the curved screen is a "double-curved" curved screen in which the two long sides a, the two short sides b, and the respective corners c are all curved. Figure 9 As shown, the curved screen includes a display panel 21 and a cover plate 3 covering the display panel 21. The shape and size of the display panel 21 and the cover plate 3 match, and the two long sides a, the two short sides b, and the respective corners c of the display panel 21 and the cover plate 3 are all curved portions d.

[0174] By forming a bending portion d at each corner c of the curved screen, during the bending of the long side a and the short side b of the display panel 21 of the curved screen, by also deforming and bending the corner c of the display panel 21, it is possible to prevent wrinkles or sharp corners from being formed at the corner c of the display panel 21, avoid the phenomenon of stress concentration at the corner c of the display panel 21, so as not to affect the performance of the display panel 21. Moreover, when the display panel 21 is attached to the cover plate 3, the corner c of the display panel 21 will not come into contact with the cover plate 3 in advance, which can prevent the occurrence of a bubble area between the cover plate 3 and the display panel 21 after attachment, and improve the attachment effect of the curved screen.

[0175] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0176] The terms "first", "second", "third", "fourth", etc. (if any) in the description of the embodiments of the present application, the claims, and the above drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence.

Claims

1. A fitting fixture for a curved screen, characterized in that, It includes a carrier platform assembly and a clamping mechanism. The carrier platform assembly includes a carrier surface for placing a display panel assembly; the clamping mechanism moves up and down in a direction perpendicular to the carrier surface, or moves towards or away from the carrier platform assembly in a direction parallel to the carrier surface; The display panel assembly includes a display panel and a carrier film. The carrier film is attached to one side surface of the display panel facing the carrier surface. The carrier film includes a main body portion and a plurality of pulling portions connected to the periphery of the main body portion. The main body portion covers the display panel, and the pulling portions extend outside the display panel. The clamping mechanism is used to clamp the pulling portions; Wherein, the clamping mechanism includes corner clamping components corresponding to the respective corner portions of the display panel assembly. The pulling portions include corner pulling portions connected to the corners of the main body portion. The corner clamping components are used to clamp the corner pulling portions, and the corner clamping components are arranged facing the protruding direction of the corner portions of the display panel assembly; From the end where the corner pulling portion is connected to the main body portion to the clamped portion of the corner pulling portion, the width of the corner pulling portion gradually increases, and the clamping end of the corner clamping component completely covers the clamped portion of the corner pulling portion; The corners of the main body portion and the corner pulling portions are divided into at least two flattened sections along the circumference of the corners.

2. The fitting fixture according to claim 1, characterized in that, The clamping mechanism further includes a plurality of side clamping components, and each of the side clamping components is correspondingly located outside each side of the display panel assembly; The pulling portions further include a plurality of side pulling portions, and each of the side pulling portions is connected to each side of the main body portion. The side clamping components are used to clamp the side pulling portions.

3. The bonding jig according to claim 2, wherein, The number of the side clamping components is 4, and the 4 side clamping components respectively correspond to the four sides of the display panel assembly; the number of the side pulling portions is 4, and the 4 side pulling portions are respectively connected to the sides of the four sides of the main body portion.

4. The bonding jig according to claim 3, wherein The 4 side clamping components include 2 long side clamping components and 2 short side clamping components. The 2 long side clamping components are respectively correspondingly located outside the two long sides of the display panel assembly, and the 2 short side clamping components are respectively correspondingly located outside the two short sides of the display panel assembly; The 4 side pulling portions include 2 long side pulling portions and 2 short side pulling portions. The 2 long side pulling portions are respectively connected to the two long sides of the main body portion, and the 2 short side pulling portions are respectively connected to the two short sides of the main body portion; the long side clamping components are used to clamp the long side pulling portions, and the short side clamping components are used to clamp the short side pulling portions.

5. The fitting fixture according to any one of claims 2-4, characterized in that Both the corner clamping components and the side clamping components include an upper clamping plate and a lower clamping plate which are arranged oppositely, and the upper clamping plate and the lower clamping plate are used to clamp the pulling portion between the two.

6. The fitting fixture according to any one of claims 2-4, characterized in that, It further includes a driving mechanism. The driving mechanism is connected to the clamping mechanism, and the driving mechanism is used to drive the clamping mechanism to move.

7. The fitting jig according to claim 6, wherein The driving mechanism includes a plurality of driving components, and each of the driving components is respectively connected to each of the corner clamping components and each of the side clamping components.

8. The laminating jig according to any one of claims 1-4 and 7, characterized in that, The carrier stage assembly includes a base and a buffer pad. The buffer pad is disposed on the base, and the bearing surface is the surface of the buffer pad facing away from the base.

9. A carrier film, applied to the laminating fixture according to any one of claims 1-8, characterized in that, It includes a main body portion and a plurality of pulling portions connected to the periphery of the main body portion. The plurality of pulling portions include a plurality of side pulling portions and a plurality of corner pulling portions. Each of the side pulling portions is connected to each side of the main body portion, and each of the corner pulling portions is connected to each corner of the main body portion.

10. The carrier film according to claim 9, wherein, The pulling portion includes a deformation section and a clamping section. The deformation section is located between the edge of the main body portion and the clamping section, and the clamping section is used to be clamped by the clamping mechanism of the fitting jig.

11. The carrier film according to claim 10, wherein, The width of the deformation section of the corner pulling portion gradually increases from the end connected to the main body portion to the other end thereof.

12. The carrier film according to claim 10, wherein, The width of the deformation section of the side pulling portion gradually decreases from the end connected to the main body portion to the other end thereof, and the width of the clamping section of the side pulling portion is smaller than the width of its deformation section.

13. The carrier film according to any one of claims 9-12, characterized in that, The shape of the main body portion is rectangular. The side pulling portions include two long-side pulling portions and two short-side pulling portions. The two long-side pulling portions are respectively connected to the two long sides of the main body portion, and the two short-side pulling portions are respectively connected to the two short sides of the main body portion.

14. A method for bonding a curved screen, using the bonding jig for a curved screen according to any one of claims 1-8, characterized in that, It includes: Attaching a carrier film to the back surface of the display panel to form a display panel assembly; wherein, the carrier film includes a main body portion and a plurality of pulling portions connected to the periphery of the main body portion. The main body portion covers the display panel, and the pulling portions extend outside the display panel. The pulling portions include corner pulling portions connected to the corners of the main body portion; Placing the display panel assembly on the carrier stage assembly, with the carrier film facing the carrier stage assembly, and clamping each of the pulling portions on the clamping mechanism; Controlling the clamping mechanism to move and pull the pulling portions, driving the edges of the display panel to bend towards the direction of the carrier stage assembly; When the bending radian of the edges of the display panel reaches a preset radian, controlling the clamping mechanism to stop moving, and attaching a cover plate to the front surface of the display panel; Wherein, the clamping mechanism includes corner clamping components corresponding to the corners of the display panel assembly. The clamping each of the pulling portions on the clamping mechanism includes: Clamping the corner pulling portions on the corner clamping components.

15. The bonding method of the curved screen according to claim 14, wherein From the end where the corner pulling portion is connected to the main body portion to the clamped portion of the corner pulling portion, the width of the corner pulling portion gradually increases; The clamping the corner pulling portions on the corner clamping components specifically includes: Moving the corner clamping components so that the clamping ends of the corner clamping components completely cover the clamped portions of the corner pulling portions.

16. The bonding method of the curved screen according to claim 14 or 15, characterized in that, Before the attaching the carrier film to the back surface of the display panel to form a display panel assembly, it further includes: Dividing the corners of the main body portion and the corner pulling portions together into at least two flattened sections along the circumferential direction of the corners of the main body portion.

17. The bonding method of the curved screen according to claim 16, wherein The connection portion between the flattened section and the main body portion is a fan-shaped area, and the central angles of the fan-shaped areas corresponding to the flattened sections are the same.

18. The bonding method of the curved screen according to any one of claims 14-16 and 17, characterized in that The attaching the cover plate to the front surface of the display panel specifically includes: Keep the clamping mechanism at the current position and maintain the clamping state, so that the pulling part is in a tensioned state; Place the cover plate on the front of the display panel; Apply pressure to the cover plate to attach the cover plate to the display panel; Remove the assembled display panel after being attached to the cover plate from the carrier assembly; Remove the carrier film attached to the back of the display panel to form a curved screen.

19. A curved screen, characterized in that, The curved screen is formed by using the fitting method of the curved screen according to any one of claims 14-18.

20. The curved screen according to claim 19, characterized in that, The curved screen includes a flat portion and curved portions connected to the respective sides and corners of the flat portion.

21. An electronic device, characterized in that, Including the curved screen according to claim 19 or 20.

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