Pressing device

Abstract

The invention discloses a pressing device, and belongs to the technical field of display. The pressing device comprises a bearing platform and a pressing assembly. The bearing platform is provided with a bearing surface, the bearing surface is used for bearing the display module, the display module comprises a display panel and a flexible circuit board in binding connection with the display panel, the front surface of the display panel is in contact with the bearing surface, and at least part of the flexible circuit board is located on the back surface of the display panel; the pressing assembly and the bearing platform are oppositely arranged, and the pressing assembly comprises a base and a pressing head fixed to the side, facing the bearing platform, of the base; the face, away from the base, of the pressing head is provided with a first pressing face and a second pressing face, and the vertical distance between the first pressing face and the base is larger than the vertical distance between the second pressing face and the base. The pressing head is used for pressing the protective adhesive tape to the side, away from the display panel, of the flexible circuit board. According to the pressing device provided by the embodiment of the invention, the problems of virtual sticking and die marks existing in the sticking of the protective adhesive tape can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a pressing device. Background Art

[0002] The assembly process of the display module involves bending the bending area of ​​the display panel and attaching the flexible circuit board bound to the binding area of ​​the display panel to the back of the display panel. After that, a protective tape needs to be attached to the back of the display module to cover and protect the flexible circuit board and part or all of the binding area.

[0003] Currently, the pressing surface of the pressing head used for pressing the protective tape is a plane, but the back of the display module is not a plane, so the pressing pressure on the protective tape is uneven, resulting in the protective tape being softly attached. Summary of the invention

[0004] The present application provides a pressing device, which can solve the problem of false attachment of protective tape in the prior art. The technical solution is as follows:

[0005] In one aspect, a pressing device is provided, comprising: a carrying platform and a pressing assembly;

[0006] The carrying platform has a carrying surface, and the carrying surface is used to carry a display module, wherein the display module includes: a display panel, and a flexible circuit board bound and connected to the display panel, the front side of the display panel contacts the carrying surface, and at least a part of the flexible circuit board is located on the back side of the display panel;

[0007] The pressing assembly is arranged opposite to the carrying platform, and comprises: a base, and a pressing head fixed on the side of the base facing the carrying platform; the pressing head has a first pressing surface and a second pressing surface on a side facing away from the base, and the vertical distance between the first pressing surface and the base is greater than the vertical distance between the second pressing surface and the base;

[0008] In which, the laminating head is used to press the protective tape to the side of the flexible circuit board facing away from the display panel, and the vertical distance between the part of the protective tape pressed by the first laminating surface and the back of the display panel is smaller than the vertical distance between the part of the protective tape pressed by the second laminating surface and the back of the display panel.

[0009] Optionally, the first pressing surface is used to press the protective tape onto a first portion of the flexible circuit board, and a first cushion block is provided between the first portion and the display panel;

[0010] The second pressing surface is used to press the protective tape onto the second portion of the flexible circuit board, and the second portion is bonded to the back surface of the display panel.

[0011] Optionally, the first pressing surface and the second pressing surface are arranged along a first direction;

[0012] The side of the pressing head facing away from the base also has a first avoidance groove, the first avoidance groove is located between the first pressing surface and the second pressing surface, the extension direction of the first avoidance groove is parallel to the second direction, and the second direction intersects with the first direction.

[0013] Optionally, the pressing head further has a third pressing surface on a side facing away from the base;

[0014] The third pressing surface is used to press the protective tape onto the back of the display panel, and the portion of the protective tape pressed by the third pressing surface is bonded to the display panel;

[0015] Wherein, a vertical distance between the third pressing surface and the base is greater than a vertical distance between the second pressing surface and the base.

[0016] Optionally, the third pressing surface is arranged adjacent to the second pressing surface, and / or the third pressing surface is arranged adjacent to the first pressing surface.

[0017] Optionally, the pressing head further has a fourth pressing surface on a side facing away from the base;

[0018] The fourth pressing surface is used to press the protective tape onto the binding area of ​​the display panel; the fourth pressing surface is located on a side of the first pressing surface away from the second pressing surface.

[0019] Optionally, a vertical distance between the fourth pressing surface and the base is equal to a vertical distance between the first pressing surface and the base.

[0020] Optionally, the side of the pressing head facing away from the base further comprises: a first avoidance portion, the first avoidance portion is located on a side of the fourth pressing surface away from the first pressing surface;

[0021] The shape of the first avoiding portion matches the shape of a portion of the protective adhesive layer for protecting the bending area in the display panel extending to the binding area.

[0022] Optionally, the side of the pressing head facing away from the base further has a second avoidance groove and / or a third avoidance groove;

[0023] The second avoidance groove is used to avoid the first electronic component on the flexible circuit board;

[0024] The third avoidance groove is used to avoid the second electronic component on the binding area of ​​the display panel;

[0025] The side of the pressing head facing away from the base also has: a pressure relief groove connected with the second avoidance groove and / or the third avoidance groove; the pressure relief groove is used to communicate with the external environment.

[0026] Optionally, the lamination head has a contoured profile that matches the outer contour of the protective tape;

[0027] When the laminating head laminates the protective tape, the orthographic projection of the protective tape on the carrying platform is located within the orthographic projection of the laminating head on the carrying platform.

[0028] The beneficial effects of the technical solution provided by the embodiment of the present application are:

[0029] In view of the structure that can produce a height difference on the back of the display panel (such as a flexible circuit board), the laminating head is provided with at least two laminating surfaces with different vertical distances from the base. As a result, the parts of the protective tape with different vertical distances from the back of the display panel can be pressed by the corresponding laminating surfaces. In this way, the pressure on the parts of the protective tape with different vertical distances from the back of the display panel tends to be consistent or the pressure difference is reduced, and the protective tape is evenly pressed as a whole. Based on this, the laminating device provided in the embodiment of the present application can improve the problems of false sticking and mold printing when attaching the protective tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the attachment process of the current protective tape;

[0032] Figure 2 A schematic diagram of the structure of a pressing device provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of a press-fit assembly provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the structure of a pressing head provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the structure of a display module provided in an embodiment of the present application;

[0036] Figure 6 A schematic diagram of a protective tape attached to a display panel according to an embodiment of the present application;

[0037] Figure 7 A front view of a pressing head provided in an embodiment of the present application;

[0038] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure of the display panel at AA' is shown;

[0039] Fig. 9 for Figure 8 A partial enlarged view of the middle A area;

[0040] Fig.10 for Figure 7 A schematic diagram of the cross-sectional structure of the display panel at BB' is shown;

[0041] Fig.11 for Figure 7 A schematic diagram of the cross-sectional structure of the display panel at CC' is shown;

[0042] Fig.12 for Figure 5 A schematic diagram of the cross-sectional structure of the display panel at DD' is shown;

[0043] Fig.13 for Figure 6 A schematic diagram of the cross-sectional structure of the display panel at EE' is shown;

[0044] Fig.14 for Figure 6 A schematic diagram of the cross-sectional structure of the display panel at FF' is shown;

[0045] Fig.15 for Figure 8 A partial enlarged view of the middle B area;

[0046] Fig.16 A schematic diagram of the structure of the base provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] Please refer to Figure 1 , Figure 1The protective tape 4 (IC CoverTape, referred to as Tape) is attached to the back of the display panel 1 to shield and protect the flexible printed circuit 3 (Flexible Printed Circuit, referred to as FPC) and the electronic components 21, such as the chip (referred to as IC), on the back of the display panel 1.

[0049] The above-mentioned attachment process can be divided into the attachment of the protective tape 4 and the lamination of the protective tape 4. The attachment of the protective tape 4 is attached to the back of the display panel 1 by vacuum adsorption; the lamination process of the protective tape 4 is to press the protective tape 4 to ensure that the protective tape 4 is compacted and flattened and fully attached to the back of the display panel 1.

[0050] In the past, the protective tape 4 pressing jig was designed according to the length and width of the protective tape 4, and was generally rectangular with a large pressing area. At present, the quality inspection of the display module has put forward requirements for the attachment quality of the protective tape 4. For example, poor attachment of the protective tape 4 will cause the protective tape 4 to be falsely attached and the display panel 1 to be molded.

[0051] The situation where the protective tape 4 is not firmly attached to the flexible circuit board 3 or the back of the display panel 1 can be defined as virtual attachment. The situation where a mark can be observed on the front of the display panel 1 can be defined as mold imprint.

[0052] When the protective tape 4 is pressed onto the back of the display panel 1, part of the protective tape 4 is attached to the flexible circuit board 3, another part is attached to the back of the display panel 1, and another part is attached to the binding area 2 of the display panel 1. The above areas may have the above-mentioned false sticking or mold printing problems.

[0053] The applicant has found that in the assembly process of the display module, before the protective tape is attached, processes such as heat dissipation film attachment, flexible circuit board binding, and bending zone bending are also involved. After the display panel is subjected to the bending process, the binding area is attached to the back of the heat dissipation film through a pad, and the flexible circuit board is attached to the heat dissipation film through a backing adhesive. Therefore, there is a height difference between the binding area of ​​the display panel and the back of the display area of ​​the display panel, and between the FPC and the back of the display panel, which leads to a corresponding height difference when the protective tape is attached. Under the same process pressure parameters, the contact surface between the jig and the protective tape is a whole plane. Due to the existence of the height difference, there are situations where the local pressure is small and the local pressure is too large. The situation where the pressure on the corresponding protective tape is small is prone to false sticking. The situation where the pressure on the corresponding protective tape is too large, the pressure will be transmitted to the transparent adhesive layer between the display panel and the cover plate, causing the transparent adhesive layer to be locally deformed, so that the mold printing problem is observed on the front of the display panel.

[0054] The present application embodiment provides a pressing device, please refer to Figures 2 to 8 , Figure 2 This is a schematic diagram of the structure of the pressing device provided in the embodiment of the present application. Figure 3 A schematic diagram of the structure of a press-fit assembly provided in an embodiment of the present application, Figure 4 A schematic diagram of the structure of the pressing head provided in the embodiment of the present application, Figure 5 A schematic diagram of the structure of a display module provided in an embodiment of the present application, Figure 6 is a schematic diagram of a protective tape attached to a display panel according to an embodiment of the present application, Figure 7 A front view of a pressing head provided in an embodiment of the present application, Figure 8 for Figure 7 The cross-sectional structure diagram of the display panel at AA′ is shown. The pressing device 000 may include: a carrying platform 001 and a pressing assembly 002 .

[0055] The carrying platform 001 has a carrying surface, and the carrying surface is used to carry the display module 003. The display module 003 may include: a display panel 301, and a flexible circuit board 302 bound and connected to the display panel 301. The front side of the display panel 301 contacts the carrying surface, and at least part of the flexible circuit board 302 is located on the back side of the display panel 301.

[0056] The pressing assembly 002 is arranged opposite to the carrying platform 001, and the pressing assembly 002 may include: a base 100, and a pressing head 200 fixed on the side of the base 100 facing the carrying platform 001. The pressing head 200 has a first pressing surface 201 and a second pressing surface 202 on a side facing away from the base 100, and a vertical distance h1 between the first pressing surface 201 and the base 100 is greater than a vertical distance h2 between the second pressing surface 202 and the base 100.

[0057] Among them, the laminating head 200 is used to press the protective tape 004 to the side of the flexible circuit board 302 facing away from the display panel 301, and the vertical distance between the part of the protective tape 004 pressed by the first laminating surface 201 and the back side of the display panel 301 is smaller than the vertical distance between the part of the protective tape 004 pressed by the second laminating surface 202 and the back side of the display panel 301.

[0058] Please refer to Fig. 9 , Fig. 9 for Figure 8 In the partial enlarged view of the A area, in view of the height difference between the first part and the second part, a height difference △h1=h2-h1 is correspondingly set between the first pressing surface 201 and the second pressing surface 202.

[0059] In the embodiment of the present application, the pressing head is provided with at least two pressing surfaces with different vertical distances from the base in view of the structure that can produce a height difference on the back of the display panel (such as a binding area, a flexible circuit board). Thus, the parts of the protective tape with different vertical distances from the back of the display panel can be pressed by the corresponding pressing surfaces. In this way, the pressure on the parts of the protective tape with different vertical distances from the back of the display panel tends to be consistent or the pressure difference is reduced, and the protective tape is evenly pressed as a whole. Based on this, the pressing device provided in the embodiment of the present application can improve the problems of false sticking and mold printing when attaching the protective tape.

[0060] For some possible implementations, see Figure 4 , Figures 7 to 11 , Fig.10 for Figure 7 The cross-sectional structure diagram of the display panel at BB' is shown. Fig.11 for Figure 7 The cross-sectional structure diagram of the display panel at C-C' is shown. According to the specific situation that there is a structure that can produce a height difference on the back of the display panel, the pressing head 200 can also correspond to more pressing surfaces with different heights, such as the third pressing surface 203, the fourth pressing surface 204, etc. In the embodiment of the present application, the height of the pressing surface refers to the vertical distance between the pressing surface and the base 100. The height of the protective tape 004, the binding area 301c and the flexible circuit board 302 refers to the vertical distance between the back of the display panel 301.

[0061] For some possible implementations, see Figure 12 to Figure 14 , Fig.12 for Figure 5 The cross-sectional structure diagram of the display panel at the D-D' is shown. Fig.13 for Figure 6 The cross-sectional structure diagram of the display panel at EE' is shown. Fig.14 for Figure 6 The cross-sectional structure diagram of the display panel at the F-F' is shown. The first pressing surface 201 is used to press the protective tape 004 onto the first part of the flexible circuit board 302, and there is a first pad 302b between the first part and the display panel 301; the second pressing surface 202 is used to press the protective tape 004 onto the second part of the flexible circuit board 302, and the second part is bonded to the back of the display panel 301.

[0062] Please refer to Fig.12In order to support the first electronic component 302a on the flexible circuit board 302, the display module 003 may be provided with a first cushion block 302b between the flexible circuit board 302 and the back of the display panel 301. Therefore, the first part of the flexible circuit board 302 is bonded to the back of the display panel 301 through the first cushion block 302b, and the second part of the flexible circuit board 302 is directly bonded to the back of the display panel 301. The part of the flexible circuit board 302 between the first part and the second part may have a suspended portion 300a between the back of the display panel 301.

[0063] Please refer to Figure 6 and Fig.14 The first pressing surface 201 can be used to press the first protection part 004a in the protective tape 004, and the first part of the flexible circuit board 302 covered by the first protection part 004a has a first cushion block 302b on the side away from the protective tape 004. The first pressing surface 201 can be used to press the second protection part 004b in the protective tape 004, and the second part of the flexible circuit board 302 covered by the second protection part 004b is directly bonded to the back of the display panel 301.

[0064] For some possible implementations, see Fig.12 The display panel 301 has a display area 301a and a non-display area surrounding the display area 301a; the non-display area includes: a bending area 301b and a binding area 301c, and the bending area 301b is closer to the display area 301a than the binding area 301c. Before the display panel 301 is bent, the bending area 301b and the binding area 301c are arranged along the first direction X. The flexible circuit board 302 is bound and connected to the binding area 301c; the display panel 301 also has a heat dissipation film 304 on the back of the display area 301a, and the flexible circuit board 302 is located on the side of the heat dissipation film 304 away from the display area 301a.

[0065] For example, a support film 303 and a heat dissipation film 304 may be bonded to the back of the display panel 301, and the heat dissipation film 304 is closer to the flexible circuit board 302 than the support film 303. In the case where the display panel 301 has the heat dissipation film 304, the back of the display panel 301 described in the embodiment of the present application may refer to the side of the heat dissipation film 304 away from the display area 301 of the display panel 301.

[0066] For some possible implementations, see Figure 4, the first pressing surface 201 and the second pressing surface 202 are arranged along the first direction X. The pressing head 200 further has a first avoidance groove 200a on a side facing away from the base 100, the first avoidance groove 200a is located between the first pressing surface 201 and the second pressing surface 202, the extension direction of the first avoidance groove 200a is parallel to the second direction Y, and the second direction Y intersects with the first direction X, for example, is perpendicular.

[0067] In the embodiment of the present application, due to the height difference between the first part and the second part of the flexible circuit board 302, after the flexible circuit board 302 is bonded to the back of the display panel 301, there is a bent transition portion between the first part and the second part, and there is a suspended portion 300a between the transition portion and the back of the display panel 301. The pressing head 200 provided in the embodiment of the present application can be provided with a first avoidance groove 200a for the transition portion to avoid the overpressure on the bent transition portion of the flexible circuit board 302.

[0068] For some possible implementations, see Figure 4 , Figure 8-Figure 9 ,and Fig.13 The side of the pressing head 200 facing away from the base 100 also has a third pressing surface 203. The third pressing surface 203 is used to press the protective tape 004 to the back of the display panel 301, and the part of the protective tape 004 pressed by the third pressing surface 203 is bonded to the display panel 301.

[0069] The vertical distance between the third pressing surface 203 and the base 100 is greater than the vertical distance between the second pressing surface 202 and the base 100 .

[0070] The third protective portion 004c in the protective tape 004 is directly bonded to the back of the display panel 301, and the orthographic projection of the third protective portion 004c on the display panel 301 exceeds the orthographic projection of the flexible circuit board 302 on the display panel 301. The protective tape 004 can fix the flexible circuit board 302 on the back of the display panel 301 to prevent the flexible circuit board 302 from being firmly bonded to the back of the display panel 301 due to deformation and other reasons. Among them, the vertical distance between the third protective portion 004c and the back of the display panel 301 is smaller than the vertical distance between the second protective portion 004b and the back of the display panel 301. The second pressing surface 202 and the third pressing surface 203 with a height difference can ensure that the force between the second protective portion 004b and the third protective portion 004c is uniform.

[0071] For some possible implementations, see Figure 4 The third pressing surface 203 is arranged adjacent to the second pressing surface 202 , and / or the third pressing surface 203 is arranged adjacent to the first pressing surface 201 .

[0072] For example, the orthographic projection of the flexible circuit board 302 on the display panel 301 may be located within the orthographic projection of the protective tape 004 on the display panel 301, or the orthographic projection of the flexible circuit board 302 on the display panel 301 overlaps with the orthographic projection of the protective tape 004 on the display panel 301. The corresponding third lamination surface 203 may be arranged adjacent to the first lamination surface 201 and / or the second lamination surface 202. Figure 4 As shown, the third pressing surface 203 and the second pressing surface 202 are arranged adjacent to each other in the first direction X. The third pressing surface 203 can also be arranged adjacent to both sides of the first pressing surface 201 in the second direction Y.

[0073] For some possible implementations, see Figure 4 The side of the pressing head 200 facing away from the base 100 also has a fourth pressing surface 204. The fourth pressing surface 204 is used to press the protective tape 004 to the binding area 301c of the display panel 301; the fourth pressing surface 204 is located on the side of the first pressing surface 201 facing away from the second pressing surface 202.

[0074] Please refer to Fig.13 The fourth protective portion 004d of the protective tape 004 covers part or all of the binding area 301c of the display panel 301. Since there may also be a height difference between the binding area 301c and the flexible circuit board 302, the pressing head 200 is provided with a corresponding fourth pressing surface 204 to press the fourth protective portion 004d.

[0075] For example, please refer to Figures 7 to 11 , the vertical distance between the fourth pressing surface 204 and the base 100 is equal to the vertical distance between the first pressing surface 201 and the base 100.

[0076] like Fig.13 As shown, a second pad 301e can be arranged between the binding area 301c of the display panel 301 and the display area 301a. By adjusting the first pad 302b and the second pad 301e, the binding area 301c can be made to have the same height as the first part of the flexible circuit board 302. At this time, the vertical distance between the first pressing surface 201 and the base 100 is equal to the vertical distance between the fourth pressing surface 204 and the base 100.

[0077] For some possible implementations, see Figure 4 , Fig.13 and Fig.15 , Fig.15 for Figure 8 In the partial enlarged view of the middle B area, the side of the pressing head 200 facing away from the base 100 also has: a first avoidance portion 205, and the first avoidance portion 205 is located on the side of the fourth pressing surface 204 away from the first pressing surface 201.

[0078] The shape of the first avoiding portion 205 matches the shape of the portion of the protection adhesive layer 305 for protecting the bending area 301 b in the display panel 301 that extends to the binding area 301 c .

[0079] In order to ensure the mechanical properties of the protective adhesive layer 305 , it is necessary to avoid excessive pressure on the protective adhesive layer 305 when the protective tape 004 is pressed. Therefore, the first avoidance portion 205 is provided to perform contour avoidance on the fifth protective portion of the protective tape 004 .

[0080] For some possible implementations, see Figure 4 and Figure 5 The side of the pressing head 200 facing away from the base 100 also has a second avoidance groove 206 and / or a third avoidance groove 207 .

[0081] The second avoiding groove 206 is used to avoid the first electronic component 302 a on the flexible circuit board 302 .

[0082] The third avoiding groove 207 is used to avoid the second electronic component 301 d on the binding area 301 c of the display panel 301 .

[0083] The side of the pressing head 200 facing away from the base 100 also has: a pressure relief groove 208 connected to the second avoidance groove 206 and / or the third avoidance groove 207; the pressure relief groove 208 is used to communicate with the external environment.

[0084] Since electronic components are generally arranged on the binding area 301c of the display panel 301 and the flexible circuit board 302, which are easily damaged by pressure, the second avoidance groove 206 and / or the third avoidance groove 207 need to be arranged to avoid the electronic components. When the protective tape 004 is pressed, a negative pressure cavity will be formed between the avoidance groove and the protective tape 004. After the pressing is completed, Figure 2 As shown, the pressing assembly 002 is reset upwards, and the negative pressure in the avoidance groove will lift the display module 003, and the display module 003 is likely to fall after being lifted. Therefore, the embodiment of the present application provides a pressure relief groove 208 to connect to the outside atmosphere to avoid the formation of negative pressure, thereby protecting the display module 003.

[0085] For some possible implementations, see Figure 4 , Figure 6 and Figure 7 The pressing head 200 has a contoured profile that matches the outer contour of the protective tape 004 .

[0086] When the laminating head 200 is laminating the protective tape 004 , the orthographic projection of the protective tape 004 on the carrying platform 001 is located within the orthographic projection of the laminating head 200 on the carrying platform 001 .

[0087] In the embodiment of the present application, the lamination head 200 is shaped according to the outer contour of the protective tape 004, and the edge of the lamination head 200 is 0.5 mm to 1 mm larger than the edge of the protective tape 004, thereby ensuring that the protective tape 004 is fully pressed, and can also ensure that the area outside the protective tape 004 is pressed less, avoiding pressure on areas that do not need pressure, reducing the pressure area on the back of the display panel 301, and reducing the generation of mold printing.

[0088] For example, in order to further improve the mold printing problem, the hardness of the pressing head 200 can be 7A to 13A (Shore A hardness). The hardness of the pressing head 200 currently used is generally 20A to 30A. Using a softer pressing head 200 can further improve the mold printing problem.

[0089] For some possible implementations, see Figure 4 and Fig.16 , Fig.16 The schematic diagram of the structure of the base provided in the embodiment of the present application shows that the base 100 may have a first mounting groove 101, the outer contour of the first mounting groove 101 matches the outer contour of the pressing head 200, and the pressing head 200 is fixed in the first mounting groove 101 on the side facing the base 100.

[0090] In the embodiment of the present application, the pressing head 200 can be made of a silicone material, and the base 100 can be made of a metal material. The pressing head 200 currently used is in planar contact with the base 100 and is fixed with adhesive. During use, the pressing head 200 is prone to debonding. In order to improve the debonding problem, the embodiment of the present application uses the first mounting groove 101 to enhance the connection reliability between the pressing head 200 and the base 100, thereby increasing the service life of the pressing assembly 002.

[0091] In summary, the lamination device provided in the embodiment of the present application may include: a carrying platform and a lamination assembly. In view of the structure that can produce a height difference on the back of the display panel (such as a flexible circuit board), the lamination head is provided with at least two lamination surfaces with different vertical distances from the base. Thus, the parts of the protective tape with different vertical distances from the back of the display panel can be pressed by the corresponding lamination surfaces, so that the pressures on the parts of the protective tape with different vertical distances from the back of the display panel tend to be consistent or the pressure difference is reduced, and the protective tape is evenly pressed as a whole. Based on this, the lamination device provided in the embodiment of the present application can improve the problems of false sticking and mold printing when attaching the protective tape.

[0092] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0093] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0094] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pressing device, characterized in that: include: Load-bearing platform and press-fit components; The carrying platform has a carrying surface, and the carrying surface is used to carry a display module, wherein the display module includes: a display panel, and a flexible circuit board bound and connected to the display panel, the front side of the display panel contacts the carrying surface, and at least a part of the flexible circuit board is located on the back side of the display panel; The pressing assembly is arranged opposite to the carrying platform, and comprises: a base, and a pressing head fixed on the side of the base facing the carrying platform; the pressing head has a first pressing surface and a second pressing surface on a side facing away from the base, and the vertical distance between the first pressing surface and the base is greater than the vertical distance between the second pressing surface and the base; In which, the laminating head is used to press the protective tape to the side of the flexible circuit board facing away from the display panel, and the vertical distance between the part of the protective tape pressed by the first laminating surface and the back of the display panel is smaller than the vertical distance between the part of the protective tape pressed by the second laminating surface and the back of the display panel.

2. The pressing device according to claim 1, characterized in that: The first pressing surface is used to press the protective tape onto the first part of the flexible circuit board, and a first cushion block is provided between the first part and the display panel; The second pressing surface is used to press the protective tape onto the second portion of the flexible circuit board, and the second portion is bonded to the back surface of the display panel.

3. The pressing device according to claim 2, characterized in that: The first pressing surface and the second pressing surface are arranged along a first direction; The side of the pressing head facing away from the base also has a first avoidance groove, the first avoidance groove is located between the first pressing surface and the second pressing surface, the extension direction of the first avoidance groove is parallel to the second direction, and the second direction intersects with the first direction.

4. The pressing device according to any one of claims 1 to 3, characterized in that: The pressing head further has a third pressing surface on one side facing away from the base; The third pressing surface is used to press the protective tape onto the back of the display panel, and the portion of the protective tape pressed by the third pressing surface is bonded to the display panel; Wherein, a vertical distance between the third pressing surface and the base is greater than a vertical distance between the second pressing surface and the base.

5. The pressing device according to claim 4, characterized in that: The third pressing surface is arranged adjacent to the second pressing surface, and / or the third pressing surface is arranged adjacent to the first pressing surface.

6. The pressing device according to any one of claims 1 to 3 and 5, characterized in that: The pressing head further has a fourth pressing surface on a side facing away from the base; The fourth pressing surface is used to press the protective tape onto the binding area of ​​the display panel; the fourth pressing surface is located on a side of the first pressing surface away from the second pressing surface.

7. The pressing device according to claim 6, characterized in that: The vertical distance between the fourth pressing surface and the base is equal to the vertical distance between the first pressing surface and the base.

8. The pressing device according to claim 7, characterized in that: The side of the pressing head away from the base further comprises: a first avoidance portion, the first avoidance portion is located on a side of the fourth pressing surface away from the first pressing surface; The shape of the first avoiding portion matches the shape of a portion of the protective adhesive layer for protecting the bending area in the display panel extending to the binding area.

9. The pressing device according to any one of claims 1-3, 5, 7-8, characterized in that: The side of the pressing head facing away from the base also has a second avoidance groove and / or a third avoidance groove; The second avoidance groove is used to avoid the first electronic component on the flexible circuit board; The third avoidance groove is used to avoid the second electronic component on the binding area of ​​the display panel; The side of the pressing head facing away from the base also has: a pressure relief groove connected with the second avoidance groove and / or the third avoidance groove; the pressure relief groove is used to communicate with the external environment.

10. The pressing device according to any one of claims 1-3, 5, 7-8, characterized in that: The pressing head has a contoured profile that matches the outer contour of the protective tape; When the laminating head laminates the protective tape, the orthographic projection of the protective tape on the carrying platform is located within the orthographic projection of the laminating head on the carrying platform.

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