Laminating method of curved surface display device, bending laminating device and curved surface display device

Abstract

The invention discloses a fitting method of a curved surface display device, a bending fitting device and the curved surface display device.The fitting method of the curved surface display device comprises the steps that a flexible screen body and a cover plate are fitted, and a fitted initial module is obtained; bending the initial module to obtain a curved screen; the curved screen is attached to the middle frame. According to the scheme that the initial module with the cover plate is bent and deformed, the deformation quantity of the obtained curved screen can be adjusted through bending, the initial module with the cover plate is pre-bent and then aligned and attached, and the design of middle frames with different bending directions and angles can be effectively matched; due to the characteristic that the initial module can be bent subsequently, the bending amplitude and size of the initial module are easier to adjust, the method can be suitable for more middle frame design schemes, meanwhile, the bending amplitude before attachment can be improved, and terminal products of complex structures are easier to implement. The application range is wider.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a bonding method for a curved display device, a bending bonding device, and a curved display device. Background Art

[0002] A curved display screen is a display screen with curved sides formed by bonding a flexible screen to a 3D curved glass cover plate. It can realize front and side display of the product. 3D curved glass has excellent visual appearance and tactile feel. It meets the design requirements of 3C products and is widely used in various 3C product designs, such as home appliance panels, smart phones, smart watches, tablet computers, wearable smart products, dashboards, etc.

[0003] However, the shape of the current curved display screen cannot meet the changing needs of terminals and has a small scope of application. Summary of the invention

[0004] The embodiments of the present application provide a method for bonding a curved display device, a bending bonding device, and a curved display device, aiming to solve the technical problem that the application range of the curved display screen is relatively small.

[0005] A first aspect of the present application provides a method for bonding a curved display device, and the method for bonding a curved display device includes:

[0006] Laminating the flexible screen body and the cover plate to obtain an initial module after lamination;

[0007] The initial module is bent to obtain a curved screen;

[0008] Fit the curved screen to the middle frame.

[0009] According to the implementation of the first aspect of the present application, the cover plate includes a flat area and at least one bending area, and the curvature of the bending area of ​​the cover plate in the curved screen is greater than the curvature of the bending area of ​​the cover plate in the initial module.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the cover plate is planar in the initial module.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, before the step of laminating the flexible screen body and the cover plate to obtain the initial module after lamination, the step includes:

[0012] At least one bending area is thinned so that the thickness of the bending area is smaller than the thickness of the planar area.

[0013] According to any of the aforementioned implementations of the first aspect of the present application, the step of bending the initial module to obtain a curved screen includes:

[0014] Obtain the bending data of the curved screen;

[0015] Two sets of clamping fixtures are used to clamp the two ends of the initial module respectively, wherein the two sets of clamping fixtures are arranged opposite to each other;

[0016] The two sets of clamping fixtures are driven to move relative to each other according to the bending data, so that the two sets of clamping fixtures clamp the initial module and bend it according to the bending data to obtain a curved screen.

[0017] According to any of the aforementioned implementations of the first aspect of the present application, the bending data is determined according to the middle frame.

[0018] According to any of the aforementioned implementations of the first aspect of the present application, the step of bonding the curved screen to the middle frame includes:

[0019] Apply middle frame glue on the edge of the middle frame;

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, before the step of applying the middle frame glue on the edge of the middle frame, the method includes:

[0021] Fix the middle frame to the middle frame fixing mechanism.

[0022] According to any of the aforementioned implementations of the first aspect of the present application, the middle frame fixing mechanism is arranged in close contact with the middle frame.

[0023] According to any of the aforementioned implementations of the first aspect of the present application, the step of bonding the curved screen to the middle frame includes:

[0024] The driving mechanism drives the clamping fixture to move the bent curved screen to above the middle frame fixing mechanism;

[0025] Use the visual module to calibrate the position of the curved screen and the middle frame;

[0026] The bonding mechanism presses down to drive the curved screen to bond with the middle frame, and maintains the preset time to allow the middle frame glue to solidify.

[0027] According to any of the foregoing implementations of the first aspect of the present application, the step of laminating the curved screen to the middle frame includes:

[0028] Take out the bonded curved screen and middle frame.

[0029] According to any of the aforementioned embodiments of the first aspect of the present application, the curved screen includes at least one curved portion, the middle frame includes at least one curved fitting portion, and the curved portions correspond to the curved fitting portions one by one;

[0030] In the steps of bending the initial module:

[0031] If the concave surface of the curved portion is arranged away from the curved fitting portion, the curved angle of the curved portion is smaller than the curved angle of the corresponding curved fitting portion;

[0032] If the concave surface of the curved portion is arranged toward the curved fitting portion, the bending angle of the curved portion is greater than the bending angle of the corresponding curved fitting portion.

[0033] According to any of the aforementioned embodiments of the first aspect of the present application, the absolute value of the difference between the bending angle of the bending portion and the bending angle of the curved fitting portion is 1° to 3°.

[0034] According to any of the aforementioned embodiments of the first aspect of the present application, the curved screen includes a first curved portion and a second curved portion, the middle frame includes a first curved bonding portion and a second curved bonding portion, and the step of bonding the curved screen to the middle frame includes:

[0035] The first laminating mechanism presses down to drive the first curved portion to be laminated with the first curved laminating portion;

[0036] The second bonding mechanism presses down to drive the second curved portion to bond with the second curved bonding portion.

[0037] According to any of the aforementioned embodiments of the first aspect of the present application, the concave surface of the first curved portion is oriented opposite to the concave surface of the second curved portion.

[0038] According to any of the aforementioned embodiments of the first aspect of the present application, before the step of pressing down the second bonding mechanism to drive the second curved portion to bond with the second curved bonding portion, the step includes:

[0039] The curved screen and the middle frame are re-fixed to suspend the second curved portion and the second curved fitting portion;

[0040] The first fitting mechanism is pressed down again until it abuts against the first curved portion.

[0041] A second aspect of the present application provides a bending and laminating device, which can be used in the laminating method of the curved display device in any of the above embodiments. The bending and laminating device includes:

[0042] Mounting seat;

[0043] Two sets of clamping fixtures are arranged opposite to each other and mounted on a mounting seat;

[0044] At least one set of driving mechanisms, the driving mechanisms are connected to a clamping fixture, and the driving mechanisms are used to drive the clamping fixture to move along the first direction or the second direction;

[0045] The middle frame fixing mechanism is spaced apart from the mounting seat.

[0046] According to an implementation of the second aspect of the present application, the bending and laminating device further includes:

[0047] A coordinate moving platform is connected to the mounting seat and is used to drive the mounting seat to move closer to or away from the middle frame fixing mechanism;

[0048] The fitting mechanism comprises a driving member and an abutting member connected to each other, wherein the abutting member is used to abut against the curved screen, and the driving member is used to drive the abutting member to approach or move away from the middle frame fixing mechanism.

[0049] According to any of the aforementioned embodiments of the second aspect of the present application, a clamping fixture is movably disposed relative to the mounting seat along a first direction, and another clamping fixture and the mounting seat are movably disposed along a second direction.

[0050] According to any of the aforementioned embodiments of the second aspect of the present application, a clamping fixture is slidably connected to a mounting seat via a screw structure.

[0051] According to any of the aforementioned embodiments of the second aspect of the present application, the number of the bonding mechanisms is multiple groups.

[0052] According to any of the aforementioned embodiments of the second aspect of the present application, the abutment member is cylindrical, and the outer peripheral surface of the abutment member is used to abut against the curved screen.

[0053] According to any of the aforementioned embodiments of the second aspect of the present application, the bending and laminating device further includes:

[0054] The visual module is used to identify the relative position of the clamping fixture and the middle frame fixing mechanism, and the visual module is communicatively connected with the coordinate moving platform.

[0055] An embodiment of a third aspect of the present application provides a curved display device, which is prepared and formed according to the bonding method of the curved display device of any of the above-mentioned embodiments.

[0056] According to the bonding method of the curved display device of the embodiment of the present application, the bonding method of the curved display device includes bonding the flexible screen body and the cover plate to obtain the bonded initial module; bending the initial module to obtain the curved screen; bonding the curved screen to the middle frame. By setting a scheme for bending and deforming the initial module with the cover plate, the deformation amount of the obtained curved screen can be adjusted by bending, and the initial module with the cover plate is pre-bent and then aligned and bonded, which can effectively correspond to the middle frame design with different bending directions and angles. Due to the subsequent bendable characteristics of the initial module, the bending amplitude and size are also easier to adjust, and can be applied to more middle frame design schemes. At the same time, it can also increase the bending amplitude before bonding, and terminal products with complex structures are easier to realize. Compared with the scheme of pre-bending the cover plate, the present application has a wider range of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0058] Figure 1It is a schematic cross-sectional structure diagram of a curved screen and a middle frame in a curved display device provided in an embodiment of the present application when the curved screen and the middle frame are separated;

[0059] Figure 2 It is a schematic flow chart of a preparation method of a method for bonding a curved display device provided in a first embodiment of the first aspect of the present application;

[0060] Figure 3 It is a three-dimensional structural schematic diagram of a bending and laminating device and an initial module provided in an embodiment of the present application;

[0061] Figure 4 It is a schematic diagram of a three-dimensional structure of a bending and laminating device and a curved screen provided in an embodiment of the present application;

[0062] Figure 5 It is a schematic flow chart of a preparation method of a method for bonding a curved display device provided in the second embodiment of the first aspect of the present application;

[0063] Figure 6 It is a schematic flow chart of a preparation method of a method for bonding a curved display device provided in the third embodiment of the first aspect of the present application;

[0064] Figure 7 It is a schematic flow chart of a preparation method of a method for bonding a curved display device provided in the fourth embodiment of the first aspect of the present application;

[0065] Figure 8 It is a schematic diagram of a side cross-sectional structure of a bending and laminating device and a curved screen provided in an embodiment of the present application;

[0066] Fig. 9 It is a structural schematic diagram of a bonding mechanism in a bending and bonding device provided in an embodiment of the present application;

[0067] Fig.10 This is one of the schematic side cross-sectional structures of a bending and bonding device provided in an embodiment of the present application when bonding a curved screen to a middle frame;

[0068] Fig.11 This is the second schematic diagram of the side cross-sectional structure of a bending and bonding device provided in an embodiment of the present application when bonding a curved screen to a middle frame.

[0069] Description of reference numerals:

[0070] 100. curved screen; 101. curved portion;

[0071] 110, cover plate; 120, plane area; 130, bending area;

[0072] 160. Flexible screen;

[0073] 200, middle frame; 201, bending and fitting portion;

[0074] 300, initial module;

[0075] 1. Mounting seat; 11. Screw rod structure;

[0076] 2. Clamping fixture;

[0077] 4. Middle frame fixing mechanism;

[0078] 6. Laminating mechanism; 61. Driving member; 62. Abutting member. DETAILED DESCRIPTION

[0079] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0080] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0081] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0082] For existing curved screens, the glass (or other material) cover is pre-made into a product with a certain curved shape, and then the flexible screen body and the curved cover are bonded to form an initial module with a certain curved shape; the curved shape of the initial module is fixed, and the curved shape of the cover is pre-designed according to the shape of the middle frame. When the shape of the middle frame changes, the preparation process and parameters of the cover must be adjusted accordingly. In order to meet the needs of different installation terminals, the existing middle frame has many curved shapes and bending angle styles. The pre-prepared cover and initial module shape cannot meet the changing needs of the terminal, and it is difficult to realize products with large bending amplitudes and complex shapes. Based on the fact that the existing processes and equipment cannot meet the new product design and production needs and have a small scope of application, the inventor proposed a new bonding process scheme, and designed the product and process equipment mechanism according to the scheme, and verified and realized the process production of the curved middle frame bonding.

[0083] Optionally, the above-mentioned terminal product may specifically refer to an in-vehicle display product. In order to meet the design requirements of in-vehicle display products, the existing equipment and process technology have a small scope of application, and it is difficult to achieve the problem of fitting the initial module of a fixed style with the curved middle frame of varying styles.

[0084] To solve the above problems, the embodiments of the present application provide a bonding method for a curved display device, a bending bonding device and a curved display device. The bonding method for a curved display device, the bending bonding device and the embodiments of the curved display device will be described below in conjunction with the accompanying drawings.

[0085] Please also read Figures 1 to 4 , Figure 1 It is a schematic cross-sectional structure diagram of a curved screen and a middle frame in a curved display device provided in an embodiment of the present application when the curved screen and the middle frame are separated; Figure 2 It is a schematic flow chart of a preparation method of a method for bonding a curved display device provided in a first embodiment of the first aspect of the present application; Figure 3 It is a three-dimensional structural schematic diagram of a bending and laminating device and an initial module provided in an embodiment of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of a bending and bonding device and a curved screen provided in an embodiment of the present application.

[0086] An embodiment of the present application provides a method for bonding a curved display device, which may be a method for bonding an organic light emitting diode (OLED) curved display device.

[0087] like Figure 2 As shown, the first aspect of the present application provides a method for bonding a curved display device, and the method for bonding a curved display device includes:

[0088] Step S10, laminating the flexible screen body and the cover plate to obtain an initial module after lamination.

[0089] Reference Figure 1 and Figure 3 The cover plate 110 may be a glass cover plate or a transparent cover plate made of other materials. The flexible screen body 160 has its own bendable property. The step of bonding the flexible screen body 160 to the cover plate 110 may adopt a bonding process. After the bonding is completed, an initial module 300 combining the flexible screen body 160 and the cover plate 110 is obtained.

[0090] Step S20, bending the initial module to obtain a curved screen.

[0091] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, the cover plate 110 is a bendable design, and the cover plate 110 will not be damaged during the bending of the initial module 300. When pre-processing the cover plate 110, there is no need to perform a special process step of bending and fixing the cover plate 110. Instead, after the cover plate 110 and the flexible screen body 160 are combined into the initial module 300, the initial module 300 is bent corresponding to the middle frame 200 to be bonded, thereby forming the curved screen 100. This makes the shape of the curved screen 100 more compatible with the shape of the middle frame 200, so as to facilitate the subsequent bonding of the curved screen 100 and the middle frame 200.

[0092] Step S30, bonding the curved screen to the middle frame.

[0093] The middle frame 200 is the installation frame of the curved display device. The curved display device is obtained by laminating and fixing the curved screen 100 and the middle frame 200. The shape of the middle frame 200 can be fixed. For example, the middle frame 200 can be a rigid structure. In the process of laminating the curved screen 100 and the middle frame 200, pressure can also be applied to fine-tune and maintain the bending amplitude of the curved screen 100 so that it further adapts to the shape of the middle frame 200. After fixing, the installation of the curved screen 100 and the middle frame 200 is completed.

[0094] Combined with reference Figures 1 to 4According to the bonding method of the first embodiment of the present application, the flexible screen body 160 and the cover plate 110 are bonded to obtain an initial module 300 through step S10; the initial module 300 is adaptively bent to obtain a curved screen 100 through step S20, and the bending angle and bending position of the curved screen 100 can be set according to the shape of the middle frame 200; and the curved screen 100 and the middle frame 200 are installed and combined to obtain a curved display module through step S30. This application sets a scheme for bending and deforming the initial module 300 with the cover plate 110, so that the deformation of the obtained curved screen 100 can be adjusted by bending. The initial module 300 with the cover plate 110 is pre-bent and then aligned and bonded, which can effectively correspond to the middle frame 200 design with different bending directions and angles. Due to the subsequent bending characteristics of the initial module 300, its bending range and size are also easier to adjust, and it can be applied to more middle frame 200 design schemes. At the same time, it can also increase the bending range before bonding, and terminal products with complex structures are easier to realize. Compared with the scheme of pre-bending the cover plate, this application has a wider range of applications.

[0095] like Figure 1 As shown, in some optional embodiments, the cover plate 110 includes a flat area 120 and at least one bending area 130 , and the curvature of the bending area 130 of the cover plate 110 in the curved screen 100 is greater than the curvature of the bending area 130 of the cover plate 110 in the initial module 300 .

[0096] Curvature refers to the rotation rate of the tangent direction angle of a point on the curve to the arc length. It is defined by differentiation and indicates the numerical value of the curvature of the curve at a certain point. The larger the curvature, the greater the curvature of the curve; conversely, the smaller the curvature, the closer the curve is to a straight line.

[0097] The larger the radius of curvature, the flatter the curve is near the point; the smaller the radius of curvature, the steeper the curve is near the point. Therefore, the curvature of the bending area 130 of the cover plate 110 in the curved screen 100 is greater than the curvature of the bending area 130 of the cover plate 110 in the initial module 300. It can also be understood that the curvature radius of the bending area 130 of the cover plate 110 in the curved screen 100 is smaller than the curvature radius of the bending area 130 of the cover plate 110 in the initial module 300.

[0098] In these optional embodiments, the cover plate 110 includes at least one bending zone 130, which does not limit the cover plate 110 to be in a bent state before being bonded to the flexible screen body 160, but means that the bending zone 130 can be bent later. After the cover plate 110 and the flexible screen body 160 are bonded and bent to form the curved screen 100, the bending curvature of the bending zone 130 is greater than the curvature of the bending zone 130 of the cover plate 110 in the initial module 300. By setting the bending zone 130 and bending the bending zone 130, the bending angle of the initial module 300 is adjusted to make it more adaptable to the shape of the middle frame 200, more convenient to bond, and wider in scope of application. The number of bending zones 130 is not limited to one, and can also be multiple, so as to meet the needs of the middle frame 200 with more varied shapes.

[0099] Optional, such as Figure 3 As shown, in the initial module 300, the cover plate 110 is planar, that is, the bending area 130 of the cover plate 110 in the initial module 300 is planar, not curved, so that the curvature of the bending area 130 can be adjusted later, thereby improving the scope of application. Figure 4 As shown, in the curved screen 100 state, the bending area 130 is in a bent state.

[0100] See also Figure 5 , Figure 5 : is a flow chart of a preparation method of a method for bonding a curved display device provided in the second embodiment of the first aspect of the present application; in some optional embodiments, before step S10, the method includes:

[0101] Step S01, performing a thinning process on at least one bending area so that the thickness of the bending area is smaller than the thickness of the flat area.

[0102] After thinning the bending zone 130, the bending zone 130 can be bent more conveniently, and by setting the degree of thinning, the bending amplitude of the bending zone 130 can be adjusted. The setting position of the bending zone 130 can be set according to the bending position of the middle frame 200, and the thinning degree can also be set according to the bending amplitude of the middle frame 200. The present application partially thins the bending position of the cover plate 110. When the initial module 300 is subsequently bent, a certain external force can be applied to cause the initial module 300 to deform at a certain angle at the thinned position of the cover plate 110, thereby achieving a bending effect.

[0103] For example, the greater the bending amplitude of the bending zone 130 is, the smaller the thickness of the bending zone 130 is, and the greater the thickness removed by the thinning process is.

[0104] Exemplarily, the thickness of the cover plate 110 before thinning may be 0.5 mm, and after thinning a bending area 130 , the thickness of the bending area 130 may be 0.05 mm to 0.1 mm.

[0105] Exemplarily, in order to prevent the thinned cover plate 110 from being bent, glass glue may be applied to the corresponding recessed position of the thinning treatment; the recessed opening formed by the thinning treatment is arranged toward the flexible screen body 160 to avoid it being exposed to the outside world and affecting the user experience.

[0106] See also Figure 6 , Figure 6 is a flow chart of a preparation method of a method for bonding a curved display device provided in the third embodiment of the first aspect of the present application; in some optional embodiments, step S20 includes:

[0107] S21, obtaining bending data of the curved screen.

[0108] The bending data specifically includes a bending position and a bending angle. The bending data of the curved screen 100 can be designed according to the shape of the middle frame 200. The bending data corresponding to the curved screen 100 can be obtained through software simulation according to the middle frame 200 that is fitted as needed.

[0109] S22, using two sets of clamping fixtures to respectively clamp two ends of the initial module, wherein the two sets of clamping fixtures are arranged opposite to each other.

[0110] like Figure 3 and Figure 4 As shown, the two sets of clamping jigs 2 can move relative to each other, and the relative positions of the two ends of the initial module 300 can be adjusted by changing the relative distance (such as the horizontal distance and the vertical distance). The two sets of clamping jigs 2 are used to apply external force to control the initial module 300 to perform bending action. By using the clamping jigs 2, the bending is easier to control, and the bending accuracy is higher and the stability is better.

[0111] S23, driving the two groups of clamping fixtures to move relative to each other according to the bending data, so that the two groups of clamping fixtures clamp the initial module and bend it according to the bending data to obtain a curved screen.

[0112] For example, software simulation can be used to determine the displacement distance of the clamping fixture 2 according to the bending data, and then the two groups of clamping fixtures 2 can be controlled to complete the corresponding actions, thereby realizing the bending of the initial module 300 and obtaining the curved screen 100. The curved screen 100 designed according to the shape of the middle frame 200 can be better adapted to the middle frame 200, and it is easier and more convenient to subsequently fit the curved screen 100 to the middle frame 200.

[0113] In these optional embodiments, the initial module 300 with the cover plate 110 is bent and deformed by setting a clamping jig 2, and the deformation amount can be adjusted by the movement distance of the clamping jig 2, so that the bending angle and size of the front curved screen 100 can be more compatible with the middle frame 200.

[0114] Optionally, the bending data is determined according to the middle frame 200. Determining the bending data according to the middle frame 200 specifically refers to modeling and simulating the curved screen 100 fitted thereto according to the shape, size, bending position and other features of the middle frame 200, so as to obtain the bending data of the curved screen 100; the bending data obtained by this solution is more accurate and has a smaller error.

[0115] See also Figure 7 , Figure 7 : is a flow chart of a preparation method of a method for bonding a curved display device provided in the fourth embodiment of the first aspect of the present application; in some optional embodiments, before step S30, the method includes:

[0116] Step S26, applying middle frame glue on the edge of the middle frame.

[0117] The middle frame glue is used to achieve the bonding and fixing of the middle frame 200 and the curved screen 100. By applying the middle frame glue on the edge of the middle frame 200 in advance, the curved screen 100 and the middle frame 200 can be bonded together when the curved screen 100 and the middle frame 200 are subsequently attached. The assembly of the display device is completed after the middle frame glue is solidified for a certain period of time.

[0118] The process before step S26 includes:

[0119] Fix the middle frame to the middle frame fixing mechanism.

[0120] Optionally, the middle frame fixing mechanism is arranged in close contact with the middle frame. The middle frame fixing mechanism 4 can provide support for the middle frame 20, and the surface contact arrangement of the two makes the support effect better. Fig.10 As shown, when gluing the middle frame 200 and subsequently attaching it to the curved screen 100 , a set of middle frame fixing mechanisms 4 can be used to fix the middle frame 200 , and the shape of the middle frame fixing mechanism 4 matches the shape of the middle frame 200 .

[0121] Optionally, step S30 includes:

[0122] The driving mechanism drives the clamping fixture to move the bent curved screen to above the middle frame fixing mechanism;

[0123] Use the visual module to calibrate the position of the curved screen and the middle frame;

[0124] The bonding mechanism presses down to drive the curved screen to bond with the middle frame, and maintains the preset time to allow the middle frame glue to solidify.

[0125] Optionally, before the curved screen 100 is bonded to the middle frame 200, the curved screen 100 can be inverted manually or automatically, that is, rotated 180° in a vertical plane, and the bending angle of the curved screen 100 is still fixed during the process, so that the curved screen 100 can be bonded to the middle frame 200 below it. The precise positioning and control of the bonding process of the curved screen 100 and the middle frame 200 can be achieved by setting a coordinate moving platform; after the coordinate moving platform drives the curved screen 100 and the middle frame 200 to pre-bond, the bonding mechanism 6 squeezes the curved screen 100 to approach the middle frame 200, and the curved screen 100 and the middle frame 200 can be squeezed to make them closer, and the preset time is maintained until the glue of the middle frame solidifies to complete the assembly. It should be noted that the length of the preset time can be selected by those skilled in the art according to the adaptability of the process conditions, and the embodiment of the present application does not make specific restrictions on this.

[0126] Optionally, the visual module can be used to identify the relative position of the clamping fixture 2 and the middle frame fixing mechanism 4, and the visual module is connected to the coordinate moving platform in communication. The visual module can identify whether the clamping fixture 2 is aligned with the middle frame fixing mechanism 4, and by feeding back information to the controller, the controller controls the coordinate moving platform to drive the mounting seat 1 to move accordingly, thereby performing position calibration, and finally realizing the alignment of the curved screen 100 and the middle frame 200 and the subsequent bonding action.

[0127] Optionally, after step S30, the following steps are included:

[0128] Take out the bonded curved screen and middle frame.

[0129] After the curved screen 100 and the middle frame 200 are bonded together, the curved screen 100 and the middle frame 200 formed as a whole can be taken out together, for example, the bonding mechanism 6 is reset, the clamping fixture 2 is released, etc., to realize the unloading action, so as to facilitate the bonding of the next curved display device.

[0130] In some optional embodiments, referring to Figures 8 to 10 , the curved screen 100 includes at least one curved portion 101, and the middle frame 200 includes at least one curved bonding portion 201, and the curved portion 101 corresponds to the curved bonding portion 201 one by one; since the edge of the middle frame 200 is coated with middle frame glue, in order to prevent the curved screen 100 and the middle frame 200 from contacting the middle frame glue in advance during the bonding process, resulting in poor bonding such as glue pulling and glue overflow, the design of the curved screen 100 should avoid the edge position from contacting the middle frame 200 in advance, therefore, in step S20:

[0131] If the concave surface of the curved portion is arranged away from the curved fitting portion, the bending angle of the curved portion is smaller than the bending angle of the corresponding curved fitting portion.

[0132] The bending angle of the bending portion 101 means that the two ends of the bending portion 101 are each connected to a planar sub-curved screen 100 , and after bending, the angle between the two sub-curved screens 100 is the bending angle of the bending portion 101 ; the bending angle of the bending bonding portion 201 is the same.

[0133] The concave surface of the curved portion 101 is away from the curved bonding portion 201, that is, the convex surface of the curved portion 101 faces the curved bonding portion 201. At this position, the curved bonding portion 201 is in a structure covering the curved portion 101. When the bending angle of the curved portion 101 is smaller than the bending angle of the curved bonding portion 201, the convex surface of the curved portion 101 can first contact and bond with the concave surface of the curved bonding portion 201, and then the sub-curved screens 100 at both ends of the curved portion 101 are bonded with the middle frame 200. Fig.10 The illustrated embodiment shows a solution in which the concave surface of the curved portion 101 faces away from the curved fitting portion 201 .

[0134] If the concave surface of the curved portion is arranged toward the curved fitting portion, the bending angle of the curved portion is greater than the bending angle of the corresponding curved fitting portion.

[0135] The concave surface of the curved portion 101 faces the curved bonding portion 201, that is, the convex surface of the curved bonding portion 201 faces the curved portion 101. In this position, the curved portion 101 is in a structure covering the curved bonding portion 201. When the bending angle of the curved portion 101 is greater than the bending angle of the curved bonding portion 201, the concave surface of the curved portion 101 can first contact and fit with the convex surface of the curved bonding portion 201, and then the sub-curved screens 100 at both ends of the curved portion 101 can fit with the middle frame 200.

[0136] In these optional embodiments, by adjusting the relative bending angles of the bending portion 101 and the bending fitting portion 201, the bending portion 101 can be made to contact the bending fitting portion 201 first, and then most of the edge of the curved screen 100 can contact the middle frame glue at the edge of the middle frame 200, thereby optimizing the bonding process and preventing poor bonding such as glue pulling and glue overflow.

[0137] Exemplarily, the absolute value of the difference between the bending angle of the bending portion 101 and the bending angle of the bending and fitting portion 201 is 1° to 3°. In this embodiment, whether the bending angle of the bending portion 101 is smaller than the bending angle of the bending and fitting portion 201, or the bending angle of the bending portion 101 is larger than the bending angle of the bending and fitting portion 201, the angle difference between the two is small, which can make the subsequent pressing and fitting of the curved screen 100 easier while optimizing the fitting process, so that it can be fully fitted with the middle frame 200. If the angle difference is large, the bending angle of the bending portion 101 needs to be adjusted significantly later, and the process is relatively complicated.

[0138] Optionally, the curved screen 100 includes a first curved portion and a second curved portion, the middle frame 200 includes a first curved bonding portion and a second curved bonding portion, and step S30 includes:

[0139] The first laminating mechanism presses down to drive the first curved portion to be laminated with the first curved laminating portion;

[0140] The second bonding mechanism presses down to drive the second curved portion to bond with the second curved bonding portion.

[0141] Optionally, the concave surface of the first curved portion faces away from the concave surface of the second curved portion. Optionally, before the step of the second bonding mechanism pressing down to drive the second curved portion to bond with the second curved bonding portion comprises:

[0142] The curved screen and the middle frame are re-fixed to suspend the second curved portion and the second curved fitting portion;

[0143] The first fitting mechanism is pressed down again until it abuts against the first curved portion.

[0144] The number of the laminating mechanisms 6 can be set according to the number of the curved portions 101 of the curved screen 100. At least one curved portion 101 is formed by the relative displacement of the two sets of clamping fixtures 2. The other curved portions 101 can be formed by the laminating mechanism 6 rolling the curved screen 100 and laminating it to the middle frame 200 and then fixing it. It can be understood that the bending area 130 of the cover plate 110 in each curved portion 101 is correspondingly thinned to facilitate the subsequent rolling and bending by the laminating mechanism 6.

[0145] In these optional embodiments, multiple sets of bonding mechanisms 6 can realize segmented bending and bonding of the curved screen 100 and the middle frame 200, which can correspond to a multi-form middle frame 200 or terminal product with multiple curved arcs.

[0146] The second aspect of the present application provides a bending and bonding device, which can be used in the bonding method of the curved display device in any of the above embodiments. Please refer to Figures 1 to 10 The bending and laminating device includes a mounting seat 1, two groups of clamping fixtures 2, at least one group of driving mechanisms (not shown) and a middle frame fixing mechanism 4; the two groups of clamping fixtures 2 are arranged opposite to each other and installed on the mounting seat 1; the driving mechanism is connected to a clamping fixture 2, and the driving mechanism is used to drive the clamping fixture 2 to move along the first direction or the second direction; the middle frame fixing mechanism 4 is spaced apart from the mounting seat 1.

[0147] The driving mechanism may specifically refer to a manual, electric, pneumatic or hydraulically driven structure. For example, the manual mechanism may be a crank and a connecting rod structure. By holding the crank and turning the crank, a torque is transmitted to a clamping fixture 2 through the connecting rod structure, thereby driving the clamping fixture 2 to move. Figure 3 The Y-axis direction in the second direction can be found in Figure 7 The two sets of clamping fixtures 2 may be designed as a structure in which one is fixed and the other can be moved in multiple directions; or they may be designed as a structure in which both can be moved, and the movable directions of the two can be set according to the actual situation.

[0148] The two groups of clamping jigs 2 can move relative to each other, and the relative positions of the two ends of the initial module 300 can be adjusted by changing the relative distance (for example, the horizontal distance and the vertical distance). The two groups of clamping jigs 2 are used to apply external force to control the initial module 300 to bend, so as to adjust the bending angle of the initial module 300. The initial module 300 with the cover plate 110 is bent and deformed by using the clamping jig 2, and its deformation amount can be adjusted by the movement distance of the clamping jig 2, so that the bending angle and size of the curved screen 100 before bonding can be more compatible with the middle frame 200, so that it can be more adapted to the shape of the middle frame 200; by using the clamping jig 2, it is easier to control the initial module 300 when bending, and the bending accuracy is higher and the stability is better; the middle frame fixing mechanism 4 is used to fix the middle frame 200, and the shape of the middle frame fixing mechanism 4 matches the shape of the middle frame 200, so that the middle frame 200 can be better and more stably bonded with the curved screen 100. By changing the relative position of the middle frame fixing mechanism 4 and the mounting seat 1 , the middle frame 200 and the curved screen 100 can be brought closer or further away from each other, thereby adjusting the fitting position.

[0149] According to the bending and bonding device of the second embodiment of the present application, the initial module 300 with the cover plate 110 is bent and deformed by the bending and bonding device, so that the deformation of the obtained curved screen 100 can be adjusted by bending. When the initial module 300 with the cover plate 110 is aligned and bonded, it can effectively correspond to the middle frame 200 design with different bending directions and angles. The bending amplitude and size are also easier to adjust, which can be applicable to more middle frame 200 design schemes. At the same time, it can also increase the bending amplitude before bonding, and terminal products with complex structures are easier to realize. The deformation amount of the initial module 300 of the present application can be adjusted according to the displacement distance of the two groups of clamping fixtures 2 in the bending and bonding device, which can ensure that the bending angle and size of the front curved screen 100 meet the requirements. By pre-bending the initial module 300 with the cover plate 110 and then aligning and bonding it with the middle frame 200, it can effectively correspond to the middle frame 200 or terminal design with different bending directions and angles. Compared with the solution of pre-bending the cover plate to adapt to the middle frame 200, the application scope of the present application is wider.

[0150] In addition, it should be noted that if Figure 8 and Fig.10As shown, before the curved screen 100 is bonded to the middle frame 200, the curved screen 100 can be inverted manually or automatically, that is, rotated 180° in a vertical plane. During this process, the bending angle of the curved screen 100 is still kept fixed to facilitate the bonding of the curved screen 100 with the middle frame 200 located therebelow.

[0151] In some optional embodiments, referring to Fig. 9 and Fig.10 The bending and bonding device also includes a coordinate moving platform (not shown) and a bonding mechanism 6; the coordinate moving platform is connected to the mounting seat 1, and is used to drive the mounting seat 1 to approach or move away from the middle frame fixing mechanism 4; the bonding mechanism 6 includes a driving member 61 and an abutting member 62 that are connected to each other, the abutting member 62 is used to abut against the curved screen 100, and the driving member 61 is used to drive the abutting member 62 to approach or move away from the middle frame fixing mechanism 4.

[0152] In these optional embodiments, the coordinate moving platform can specifically use the three-coordinate moving platform of the prior art, which can realize the movement of the X, Y, and Z coordinates of the mounting seat 1 in the spatial rectangular coordinate system, thereby driving the clamping fixture 2 and the curved screen 100 set on the mounting seat 1 to move together, and the precise positioning and control of the bonding process of the curved screen 100 and the middle frame 200 are realized by setting the coordinate moving platform; after the coordinate moving platform drives the curved screen 100 and the middle frame 200 to pre-bond, the bonding mechanism 6 presses the curved screen 100 to approach the middle frame 200 to achieve further bonding. Specifically, the abutment 62 is used to contact the curved screen 100 and press the curved screen 100 and the middle frame 200 to fit more closely. When the driving member 61 drives the abutment 62 to move closer to the middle frame fixing mechanism 4, the curved screen 100 and the middle frame 200 can be pressed more closely by squeezing, and the assembly is completed after a certain period of time until the middle frame glue solidifies.

[0153] Optionally, the abutment member 62 is cylindrical, and the outer circumferential surface of the abutment member 62 is used to abut against the curved screen 100. The cylindrical abutment member 62 contacts the curved screen 100, which can better fit the curved design and can achieve tight contact between the curved screen 100 and the middle frame 200 through rolling.

[0154] Exemplarily, the driving member 61 can drive the abutting member 62 to move in at least one direction, for example Fig.10 The Z-axis direction in the figure can also drive the abutment member 62 to move in the plane rectangular coordinate system, so that the abutment member 62 can move in two directions, for example Fig.10 The Y-axis and Z-axis directions in the curved screen 100 can be rolled better.

[0155] Optional, such as Figure 3 and Figure 4, one clamping fixture 2 is movably arranged relative to the mounting seat 1 along a first direction, and the other clamping fixture 2 is movably arranged with the mounting seat 1 along a second direction. Figure 3 The Y-axis direction in the second direction is specifically referred to Figure 3 In the Z-axis direction, two groups of clamping fixtures 2 are respectively arranged to move in different directions, so that each group of clamping fixtures 2 only needs to move in one direction, which can simplify the connection and driving structure of the clamping fixture 2 and can better realize the bending action of the curved screen 100.

[0156] Optionally, one clamping fixture 2 is slidably connected to the mounting seat 1 via a screw structure 11. Another clamping fixture 2 may also be slidably connected to the mounting seat 1 via a screw structure 11. By providing the screw structure 11, the clamping fixture 2 can move more smoothly and its control accuracy can be higher.

[0157] Optional, such as Fig.11 As shown, there are multiple groups of bonding mechanisms 6. The number of bonding mechanisms 6 can be set according to the number of curved portions 101 of the curved screen 100. At least one curved portion 101 is formed by the relative displacement of two groups of clamping fixtures 2, and the other curved portions 101 can be formed by the bonding mechanism 6 rolling the curved screen 100 and bonding it to the middle frame 200 and then fixing it. It can be understood that the bending area 130 of the cover plate 110 in each curved portion 101 is correspondingly thinned to facilitate the subsequent rolling and bending by the bonding mechanism 6.

[0158] In these optional embodiments, multiple sets of bonding mechanisms 6 can realize segmented bending and bonding of the curved screen 100 and the middle frame 200, which can correspond to a multi-form middle frame 200 or terminal product with multiple curved arcs.

[0159] In some optional embodiments, the bending and bonding device further includes a visual module, which is used to identify the relative position of the clamping fixture 2 and the middle frame fixing mechanism 4, and the visual module is connected to the coordinate moving platform in communication. The visual module can identify whether the clamping fixture 2 is aligned with the middle frame fixing mechanism 4, and by feeding back information to the controller, the controller controls the coordinate moving platform to drive the mounting seat 1 to move accordingly, thereby performing position calibration, and finally realizing the alignment of the curved screen 100 and the middle frame 200 and the subsequent bonding action, improving the control accuracy, and simplifying the alignment process.

[0160] The embodiment of the third aspect of the present application provides a curved display device, which is prepared and formed according to the bonding method of the curved display device of any of the above-mentioned embodiments. Since the curved display device provided by the embodiment of the third aspect of the present application is prepared and formed by the bonding method of the curved display device of any of the above-mentioned embodiments of the first aspect, the curved display device provided by the embodiment of the third aspect of the present application has the beneficial effects of the bonding method of the curved display device of any of the above-mentioned embodiments of the first aspect, which will not be repeated here.

[0161] In some optional embodiments, referring to Figure 1 The curved display device includes a cover plate 110, a flexible screen body 160 and a middle frame 200. The cover plate 110 includes a flat area 120 and at least one bending area 130, wherein the thickness of the bending area 130 is less than the thickness of the flat area 120. In the preparation process, it is convenient to bend the bending area 130 to adapt to the shape of the middle frame 200, and it is easier to form.

[0162] The curved display device in the embodiments of the present application includes but is not limited to vehicle-mounted terminals, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart fixed-line phones, consoles, and other devices with display functions.

[0163] According to the embodiments described above, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A method for bonding a curved display device, characterized in that: The bonding method of the curved display device comprises: Laminating the flexible screen body and the cover plate to obtain an initial module after lamination; Bending the initial module to obtain a curved screen; The curved screen is bonded to the middle frame.

2. The method for bonding a curved display device according to claim 1, characterized in that: The cover plate includes a flat area and at least one bending area, and the curvature of the bending area of ​​the cover plate in the curved screen is greater than the curvature of the bending area of ​​the cover plate in the initial module; Preferably, in the initial module, the cover plate is planar.

3. The method for bonding a curved display device according to claim 2, wherein: The step of laminating the flexible screen body and the cover plate to obtain the initial module after lamination includes: The at least one bending area is thinned so that the thickness of the bending area is smaller than the thickness of the planar area.

4. The method for bonding a curved display device according to claim 1, wherein: The step of bending the initial module to obtain a curved screen comprises: Obtain the bending data of the curved screen; Using two sets of clamping jigs to clamp the two ends of the initial module respectively, wherein the two sets of clamping jigs are arranged opposite to each other; According to the bending data, the two groups of clamping jigs are driven to move relative to each other, so that the two groups of clamping jigs clamp the initial module and bend it according to the bending data to obtain a curved screen; Preferably, the bending data is determined according to the middle frame.

5. The method for bonding a curved display device according to claim 1, wherein: The step of bonding the curved screen to the middle frame includes: Apply middle frame glue on the edge of the middle frame; Preferably, before the step of applying the middle frame glue on the edge of the middle frame, the step includes: Fixing the middle frame to the middle frame fixing mechanism; Preferably, the middle frame fixing mechanism is arranged in close contact with the middle frame; Preferably, the step of bonding the curved screen to the middle frame comprises: The driving mechanism drives the clamping fixture to move the bent curved screen to above the middle frame fixing mechanism; Performing position calibration on the curved screen and the middle frame through a visual module; The bonding mechanism presses down to drive the curved screen to bond with the middle frame, and keeps the bonding for a preset time to allow the glue of the middle frame to solidify; Preferably, after the step of bonding the curved screen to the middle frame, the method further comprises: Take out the bonded curved screen and the middle frame.

6. The method for bonding a curved display device according to claim 5, characterized in that: The curved screen includes at least one curved portion, the middle frame includes at least one curved fitting portion, and the curved portions correspond to the curved fitting portions one by one; In the step of bending the initial module: If the concave surface of the curved portion is arranged away from the curved fitting portion, the bending angle of the curved portion is smaller than the bending angle of the corresponding curved fitting portion; If the concave surface of the curved portion is arranged toward the curved fitting portion, the bending angle of the curved portion is greater than the bending angle of the corresponding curved fitting portion; Preferably, the absolute value of the difference between the bending angle of the bending portion and the bending angle of the bending fitting portion is 1° to 3°; Preferably, the curved screen includes a first curved portion and a second curved portion, the middle frame includes a first curved bonding portion and a second curved bonding portion, and the step of bonding the curved screen to the middle frame includes: The first laminating mechanism presses down to drive the first curved portion to be laminated with the first curved laminating portion; The second laminating mechanism presses downward to drive the second curved portion to be laminated with the second curved laminating portion; Preferably, the concave surface of the first curved portion is oriented in a direction opposite to the concave surface of the second curved portion; Preferably, before the step of the second laminating mechanism pressing down to drive the second curved portion to be laminated with the second curved laminating portion, the step includes: Re-fixing the curved screen and the middle frame to suspend the second curved portion and the second curved fitting portion; The first fitting mechanism is pressed down again until it abuts against the first curved portion.

7. A bending and laminating device, characterized in that: include: Mounting seat; Two groups of clamping jigs, the two groups of clamping jigs are arranged opposite to each other and mounted on the mounting seat; At least one set of driving mechanisms, the driving mechanisms are connected to one of the clamping fixtures, and the driving mechanisms are used to drive the clamping fixture to move along the first direction or the second direction; The middle frame fixing mechanism is spaced apart from the mounting seat.

8. The bending and laminating device according to claim 7, characterized in that: The bending and laminating device also includes: A coordinate moving platform connected to the mounting seat and used to drive the mounting seat to approach or move away from the middle frame fixing mechanism; The laminating mechanism comprises a driving member and an abutting member connected to each other, wherein the abutting member is used to abut against the curved screen, and the driving member is used to drive the abutting member to approach or move away from the middle frame fixing mechanism; Preferably, one of the clamping fixtures is movably arranged relative to the mounting seat along a first direction, and the other of the clamping fixtures is movably arranged with the mounting seat along a second direction; Preferably, the clamping fixture is slidably connected to the mounting seat via a screw structure; Preferably, the number of the laminating mechanisms is multiple groups; Preferably, the abutment member is cylindrical, and the outer peripheral surface of the abutment member is used for abutting against the curved screen.

9. The bending and laminating device according to claim 8, characterized in that: The bending and laminating device also includes: A visual module, the visual module is used to identify the relative position of the clamping fixture and the middle frame fixing mechanism, and the visual module is communicatively connected with the coordinate moving platform.

10. A curved display device, characterized in that: The curved display device is prepared and formed according to the method for bonding a curved display device according to any one of claims 1 to 6.

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