Magnetic fluid laminating device and method for flexible screen

Abstract

The invention relates to the technical field of flexible screens, and provides a magnetofluid attaching device and method for a flexible screen, and the attaching device comprises a bearing film which is used for attaching the flexible screen; the clamping and sliding assembly is used for clamping, sliding and resetting the bearing film; the telescopic magnetic fluid bag assembly is used for profiling the bearing film to which the flexible screen is attached and driving the profiled bearing film to extend into the inner wall of the curved glass cover plate; and the electromagnetic platform is used for placing the curved glass cover plate and performing magnetic current control on the telescopic magnetic fluid bag assembly. The curved glass cover plate is stably placed through the electromagnetic platform, the flexible screen and the bearing film are positioned through the clamping sliding assembly, the flexible screen and the bearing film are profiled and moved through the telescopic magnetic fluid bag assembly, and then the curved glass cover plate is stably placed by adjusting the current and the electrifying sequence of the electromagnetic platform. The flexible screen is uniformly attached to the inner circumferential wall of the curved glass cover plate through the telescopic magnetic fluid bag assembly, and the problems of unstable attachment and poor adaptability existing in a profiling silica gel attachment technology are solved.

Description

Technical Field

[0001] The present application relates to the technical field of flexible screens, and in particular to a magnetic fluid bonding device and method for flexible screens. Background Art

[0002] At present, with the rapid development of flexible OLED displays, flexible OLED displays are widely used in various industries. The market no longer simply demands flat flexible OLED displays. C-shaped curved displays and front and back cover integrated displays are highly favored in industries such as smart wearables, mobile phones and smart homes.

[0003] Among the related technical means, the C-shaped curved surface bonding equipment on the market mainly uses the method of profiling silicone to bond the flexible display screen and the C-shaped curved glass cover plate. The profiling silicone completes the bonding process through its elasticity and shape adaptation performance. In specific operations, the profiling silicone is usually processed into the shape of the corresponding curved glass cover plate, and the flexible display screen and the glass cover plate are bonded together by applying external pressure.

[0004] Regarding the above technical solution, although the curved surface bonding of the flexible display screen can be achieved by using the contoured silicone, there are many problems in practical application. First, the service life of the contoured silicone is short, and its elasticity and shape adaptation performance will gradually decrease with the increase in the number of uses, resulting in unstable bonding effect. Secondly, the flexibility of the contoured silicone is poor, and the bonding operation cannot be effectively realized, which limits its application in the field of diversified display screens. Summary of the invention

[0005] In order to improve the problems of unstable bonding effect and poor flexibility in contoured silicone bonding technology, the present application provides a magnetic fluid bonding device and method for a flexible screen.

[0006] The present invention provides a magnetic fluid bonding device for a flexible screen, which is applied to bonding the flexible screen to a curved glass cover plate. The bonding device comprises: a carrier film, which is used to bond the flexible screen; a clamping and sliding assembly, which is used to clamp and slide the carrier film to reset it; a telescopic magnetic fluid capsule assembly, which is used to contour the carrier film to which the flexible screen is attached, and drive the contoured carrier film to extend into the inner wall of the curved glass cover plate; and an electromagnetic platform, which is used to place the curved glass cover plate and perform magnetic flow control on the telescopic magnetic fluid capsule assembly.

[0007] As a preferred embodiment, the clamping slide assembly includes a first clamping slide and a second clamping slide, and the first clamping slide and the second clamping slide are arranged on both sides of the supporting film; the first clamping slide includes a first clamping member and a first slide, and the second clamping slide includes a second clamping member and a second slide; the first clamping member is arranged on the first slide, and the second clamping member is arranged on the second slide, and the first slide and the second slide are used to drive the first clamping member and the second clamping member to move toward or away from each other.

[0008] As a preferred embodiment, the telescopic magnetic fluid capsule assembly is arranged above the supporting film, and the telescopic magnetic fluid capsule assembly includes a telescopic part and a magnetic fluid capsule, the telescopic end of the telescopic part is arranged toward the supporting film, and the magnetic fluid capsule is arranged at the telescopic end of the telescopic part.

[0009] As a preferred embodiment, the electromagnetic platform includes a main electromagnetic platform, a first electromagnetic platform and a second electromagnetic platform. The first electromagnetic platform and the second electromagnetic platform are arranged at both ends of the main electromagnetic platform. The main electromagnetic platform is used to place the planar end of the curved glass cover plate, and the first electromagnetic platform and the second electromagnetic platform are used to wrap the curved end of the curved glass cover plate.

[0010] The present application also provides a magnetic fluid bonding method for a flexible screen, which adopts a magnetic fluid bonding device for a flexible screen described in any one of the above, and the bonding method includes: pre-setting a curved glass cover plate on an electromagnetic platform; pre-attaching the flexible screen to a carrier film, and clamping the carrier film with the flexible screen attached by a clamping sliding component; contouring the carrier film with the flexible screen attached by a telescopic magnetic fluid capsule component, and driving the contoured carrier film to move to the inner wall of the curved glass cover plate; controlling the current size and power-on sequence of the electromagnetic platform, so that the magnetic fluid in the telescopic magnetic fluid capsule component drives the flexible screen on the contoured carrier film to adhere to the inner circumferential wall of the curved glass cover plate.

[0011] As a preferred embodiment, the step of controlling the current size and power-on sequence of the electromagnetic platform so that the magnetic fluid in the telescopic magnetic fluid capsule assembly drives the flexible screen on the contoured carrier film to fit the inner circumferential wall of the curved glass cover plate includes: controlling the current size and power-on sequence of the main electromagnetic table, the first electromagnetic table, and the second electromagnetic table in the electromagnetic platform so that the main electromagnetic table and the first electromagnetic table and the second electromagnetic table generate a magnetic field; using the magnetic field to directionally stretch the magnetic fluid in the magnetic fluid capsule so that the magnetic fluid in the magnetic fluid capsule is squeezed toward the inner circumferential wall of the curved glass cover plate until the flexible screen on the contoured carrier film fits the inner circumferential wall of the curved glass cover plate; wherein, optical glue is affixed to the end surface of the flexible screen away from the carrier film.

[0012] Compared with the prior art, the present application has the following beneficial effects: efficient bonding and wide application range. The electromagnetic platform is used to ensure the stable placement of the curved glass cover plate, the clamping and sliding components are used to realize the positioning of the flexible screen and the carrier film, and the flexible screen and the carrier film are contoured and moved by the telescopic magnetic fluid capsule component. Then, by adjusting the current and power-on sequence of the electromagnetic platform, the flexible screen and the inner wall of the curved glass cover plate are evenly bonded by the telescopic magnetic fluid capsule component, which improves the bonding accuracy and quality, and expands the applicability in display screens of different shapes, especially for complex screen shapes with C-shaped curves and integrated front and rear covers, and improves the problems of unstable bonding effect and poor flexibility of contoured silicone bonding technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0015] Figure 1 It is a schematic diagram of the overall structure of a magnetic fluid bonding device for a flexible screen in an embodiment of the present application; Figure 2 It is a schematic diagram of the profiling process of a magnetic fluid laminating device for a flexible screen in an embodiment of the present application; Figure 3 This is a schematic diagram of a process of laminating a C-shaped curved surface with a magnetic fluid laminating device of a flexible screen in an embodiment of the present application; Figure 4 It is a schematic diagram of the process of laminating a magnetic fluid laminating device of a flexible screen to the integrated curved surfaces of the front and rear covers in an embodiment of the present application.

[0016] Description of reference numerals: 1. Flexible screen; 2. Curved glass cover; 3. Carrying film; 4. Clamping and sliding assembly; 41. First clamping and sliding member; 411. First clamping member; 412. First sliding member; 42. Second clamping and sliding member; 423. Second clamping member; 424. Second sliding member; 5. Telescopic magnetic fluid capsule assembly; 51. Telescopic member; 52. Magnetic fluid capsule; 6. Electromagnetic platform; 61. Main electromagnetic table; 62. First electromagnetic table; 63. Second electromagnetic table. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0019] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0020] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0022] Embodiment 1: like Figures 1 to 3 As shown, the present application provides a magnetic fluid bonding device for a flexible screen, which is used for bonding a flexible screen 1 with a curved glass cover plate 2. The bonding device includes a carrier film 3 for bonding the flexible screen 1. A clamping and sliding assembly 4 is used to clamp and slide the carrier film 3. A telescopic magnetic fluid capsule 52 assembly 5 is used to contour the carrier film 3 with the flexible screen 1 attached thereto, and drive the contoured carrier film 3 to extend into the inner wall of the curved glass cover plate 2. An electromagnetic platform 6 is used to place the curved glass cover plate 2 and perform magnetic flow control on the telescopic magnetic fluid capsule 52 assembly 5.

[0023] The bonding method includes steps S100 to S400.

[0024] Step S100 , pre-set the curved glass cover plate 2 on the electromagnetic platform 6 .

[0025] like Figures 1 to 3 As shown, in this step, the electromagnetic platform 6 includes a main electromagnetic platform 61, a first electromagnetic platform 62 and a second electromagnetic platform 63. The first electromagnetic platform 62 and the second electromagnetic platform 63 are arranged at both ends of the main electromagnetic platform 61. The main electromagnetic platform 61 is used to place the planar end of the curved glass cover plate 2, and the first electromagnetic platform 62 and the second electromagnetic platform 63 are used to wrap the curved end of the curved glass cover plate 2.

[0026] The curved glass cover plate 2 is positioned and fixed by the main electromagnetic platform 61, the first electromagnetic platform 62 and the second electromagnetic platform 63, wherein the first electromagnetic platform 62 and the second electromagnetic platform 63 can be opened and closed to adapt to the curved surface of the curved glass cover plate 2 with different curved surface sizes; in other embodiments, the glass cover plate 2 can be fixed on the electromagnetic platform 6 by additional mechanical components, such as using a preset clamp to clamp the glass cover plate 2. Specifically, the main electromagnetic platform 61 is set in the middle of the device to place and fix the flat end of the curved glass cover plate 2; the first electromagnetic platform 62 and the second electromagnetic platform are respectively set at both ends of the main electromagnetic platform 61 to wrap the curved surface of the curved glass cover plate 2. The main electromagnetic platform 61, the first electromagnetic platform 62 and the second electromagnetic platform 63 all adjust their magnetic flux and magnetic field direction through magnetic field control technology to ensure the stability of the glass cover plate during operation.

[0027] Step S200 , pre-attach the flexible screen 1 to the carrier film 3 , and use the clamping slide assembly 4 to clamp the carrier film 3 attached with the flexible screen 1 .

[0028] like Figures 1 to 3 As shown, in this step, the clamping slide assembly 4 includes a first clamping slide 41 and a second clamping slide 42, and the first clamping slide 41 and the second clamping slide 42 are arranged on two symmetrical sides of the supporting film 3, the first clamping slide 41 includes a first clamping member 411 and a first slide 412, the second clamping slide 42 includes a second clamping member 423 and a second slide 424, the first clamping member 411 is arranged on the first slide 412, and the second clamping member 423 is arranged on the second slide 424, and the first slide 412 and the second slide 424 are used to drive the first clamping member 411 and the second clamping member 423 to move toward or away from each other.

[0029] The flexible screen 1 and the carrier film 3 are clamped on both sides by the clamping slide assembly 4 to ensure the positioning accuracy in the subsequent profiling operation. Specifically, the first clamping slide 41 and the second clamping slide 42 are respectively arranged on both sides of the carrier film 3, and the second clamping slide 42 clamps the right edge of the carrier film 3 through the second clamping member 423. The first slide 412 and the second slide 424 include a slide rail and a slider. The first clamping member 411 is arranged on the slider of the first slide 412 to clamp the left edge of the carrier film 3, and the second clamping member 423 is arranged on the slider of the second slide 424 to clamp the right edge of the carrier film 3 to achieve opposite or opposite movement, thereby adjusting the tension of the carrier film 3, ensuring that the flexible screen 1 is flatly attached to the carrier film 3, and providing a stable foundation for the subsequent profiling operation.

[0030] Step S300 , contouring the carrier film 3 attached with the flexible screen 1 by means of the telescopic magnetic fluid capsule 52 assembly 5 , and driving the contoured carrier film 3 to move to the inner wall of the curved glass cover plate 2 .

[0031] like Figures 1 to 3 As shown, in this step, the telescopic magnetic fluid capsule 52 assembly 5 is arranged above the supporting film 3, and the telescopic magnetic fluid capsule 52 assembly 5 includes a telescopic part 51 and a magnetic fluid capsule 52, the telescopic end of the telescopic part 51 is arranged toward the supporting film 3, and the magnetic fluid capsule 52 is arranged at the telescopic end of the telescopic part 51.

[0032] By filling the magnetic fluid capsule 52 with ferromagnetic fluid, its surface morphology is designed according to the shape of the glass cover. Specifically, the telescopic magnetic fluid capsule 52 assembly 5 controls the telescopic action of the telescopic member 51, and the telescopic member 51 is preferably a telescopic cylinder, so that the surface of the magnetic fluid capsule 52 is attached to the flexible screen 1 on the carrier film 3 and the profiling is completed. After the profiling is completed, the magnetic fluid capsule 52 assembly continues to drive the magnetic fluid capsule 52 downward through the telescopic end of the telescopic member 51, and then drives the flexible screen 1 and the carrier film 3 to move together to a position about 0.2 mm away from the inner wall of the glass cover, ready for the final adhesion.

[0033] Step S400 , controlling the current size and power-on sequence of the electromagnetic platform 6 , so that the magnetic fluid in the telescopic magnetic fluid capsule 52 assembly 5 drives the flexible screen 1 on the contoured carrier film 3 to fit the inner circumferential wall of the curved glass cover plate 2 .

[0034] like Figures 1 to 3As shown, in this step, the main electromagnetic table 61, the first electromagnetic table 62 and the second electromagnetic table 63 are controlled in current magnitude and power-on sequence to generate a magnetic field. The magnetic field is used to directional stretch the magnetic fluid in the magnetic fluid capsule 52, so that the magnetic fluid in the magnetic fluid capsule 52 is squeezed toward the inner peripheral wall of the curved glass cover plate 2 until the flexible screen 1 on the carrier film 3 after profiling is attached to the inner peripheral wall of the curved glass cover plate 2; wherein, the end surface of the flexible screen 1 away from the carrier film 3 is attached with optical glue.

[0035] By adjusting the excitation intensity and power-on sequence of the main electromagnetic table 61, the first electromagnetic table 62, and the second electromagnetic table 63, the main electromagnetic table 61 provides a magnetic field to act on the flat part of the glass cover plate, and the first electromagnetic table 62 and the second electromagnetic table 63 provide a magnetic field to act on the curved part of the glass cover plate. During the bonding process, the magnetic field is provided by the main electromagnetic table 61, the first electromagnetic table 62, and the second electromagnetic table 63, so that the magnetic fluid in the magnetic fluid capsule 52 gradually extends from the middle of the glass cover plate to both sides, so that the flexible screen 1 on the surface of the magnetic fluid capsule 52 is bonded to the inner wall of the glass cover plate. During the bonding process, it can be carried out in a vacuum environment, which can effectively reduce the bubbles and impurities remaining in the bonding area. The side of the flexible screen 1 away from the carrier film 3 is coated with solid optical adhesive (OCA). Under the action of the magnetic field, the OCA is evenly distributed and completes high-quality bonding.

[0036] In this embodiment, by utilizing the fluidity, magnetism and magnetic field control characteristics of the magnetic fluid, the flexible screen 1 and the curved glass cover plate 2 are effectively bonded. Specifically, the stable placement of the curved glass cover plate 2 is ensured by the cooperative control of the main electromagnetic table 61, the first electromagnetic table 62 and the second electromagnetic table 63; the clamping sliding component 4 realizes the precise positioning of the flexible screen 1 and the carrier film 3; the telescopic magnetic fluid capsule 52 component 5 realizes the profiling and movement of the flexible screen 1 and the carrier film 3; by adjusting the current and power-on sequence of the main electromagnetic table 61, the first electromagnetic table 62 and the second electromagnetic table 63, the magnetic fluid in the magnetic fluid capsule 52 gradually extends from the middle of the glass cover plate to both sides, so that the flexible screen 1 and the inner wall of the curved glass cover plate 2 are evenly bonded. In the entire implementation process, the magnetic fluid technology not only solves the problems of high cost, low efficiency and short life in the traditional profiling silicone method, but also improves the bonding accuracy and quality, while expanding the applicability of the technology in display screens of different forms, and improving the problems of unstable bonding effect and poor flexibility in the profiling silicone bonding technology.

[0037] Embodiment 2: like Figure 4 As shown, the present application also provides a magnetic fluid bonding device for a flexible screen with integrated front and rear covers, and its bonding process is consistent with the bonding process of Example 1, except that the magnetic fluid capsule 52 enters the curved glass cover plate 2 from the side.

[0038] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic fluid bonding device for a flexible screen, used for bonding a flexible screen to a curved glass cover plate, characterized in that: The laminating device comprises: Carrier film, used to attach the flexible screen; A clamping and sliding assembly, used for clamping and sliding the carrier film for resetting; The telescopic magnetic fluid capsule assembly is used to profile the carrier film attached with the flexible screen, and drive the profiled carrier film to extend into the inner wall of the curved glass cover plate; The electromagnetic platform is used to place the curved glass cover and perform magnetic flow control on the telescopic magnetic fluid capsule assembly.

2. The magnetic fluid laminating device for a flexible screen according to claim 1, characterized in that: The clamping slide assembly comprises a first clamping slide and a second clamping slide, wherein the first clamping slide and the second clamping slide are arranged on both sides of the carrier film; The first clamping slide member includes a first clamping member and a first slide member, and the second clamping slide member includes a second clamping member and a second slide member; The first clamping member is arranged on the first sliding member, and the second clamping member is arranged on the second sliding member. The first sliding member and the second sliding member are used to drive the first clamping member and the second clamping member to move toward or away from each other.

3. The magnetic fluid laminating device for a flexible screen according to claim 1, characterized in that: The telescopic magnetic fluid capsule assembly is arranged above the supporting film. The telescopic magnetic fluid capsule assembly includes a telescopic member and a magnetic fluid capsule. The telescopic end of the telescopic member is arranged toward the supporting film, and the magnetic fluid capsule is arranged at the telescopic end of the telescopic member.

4. The magnetic fluid laminating device for a flexible screen according to claim 1, characterized in that: The electromagnetic platform includes a main electromagnetic platform, a first electromagnetic platform and a second electromagnetic platform. The first electromagnetic platform and the second electromagnetic platform are arranged at both ends of the main electromagnetic platform. The main electromagnetic platform is used to place the planar end of the curved glass cover plate, and the first electromagnetic platform and the second electromagnetic platform are used to wrap the curved end of the curved glass cover plate.

5. A method for laminating a flexible screen with magnetic fluid, using the flexible screen laminating device with magnetic fluid as claimed in any one of claims 1 to 4, characterized in that: The bonding method comprises: Presetting the curved glass cover plate on the electromagnetic platform; The flexible screen is pre-attached to the carrier film, and the carrier film with the flexible screen attached is clamped by a clamping slide assembly; The carrier film with the flexible screen attached is contoured by the telescopic magnetic fluid capsule assembly, and the contoured carrier film is driven to move to the inner wall of the curved glass cover plate; The current size and power-on sequence of the electromagnetic platform are controlled so that the magnetic fluid in the telescopic magnetic fluid capsule assembly drives the flexible screen on the contoured carrier film to fit the inner peripheral wall of the curved glass cover plate.

6. The magnetic fluid bonding method for a flexible screen according to claim 5, characterized in that: The step of controlling the current size and power-on sequence of the electromagnetic platform so that the magnetic fluid in the telescopic magnetic fluid capsule assembly drives the flexible screen on the contoured carrier film to fit with the inner peripheral wall of the curved glass cover plate includes: Controlling the current magnitude and power-on sequence of the main electromagnetic platform, the first electromagnetic platform, and the second electromagnetic platform in the electromagnetic platform so that the main electromagnetic platform and the first electromagnetic platform and the second electromagnetic platform generate magnetic fields; The magnetic field is used to directionally stretch the magnetic fluid in the magnetic fluid capsule so that the magnetic fluid in the magnetic fluid capsule is squeezed toward the inner wall of the curved glass cover plate until the flexible screen on the contoured carrier film fits with the inner wall of the curved glass cover plate; wherein optical glue is attached to the end surface of the flexible screen away from the carrier film.

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