A display module and display device

Abstract

This application provides a display module and display device. The display module includes a back plate, a display panel, and a printed circuit board (PCB). The PCB is electrically connected to the display panel. The back plate includes a tongue, on which the PCB is fixed. The tongue includes a flat portion and a raised bulge structure protruding towards the PCB. The root of the raised bulge structure is connected to the flat portion. A through-hole is provided on the PCB, penetrating the PCB in its thickness direction. The raised bulge structure and the through-hole are interference-fitted, and the surface of the raised bulge structure away from the flat portion does not protrude from the surface of the PCB away from the flat portion. The raised bulge structure in this application can be hidden in the through-hole, eliminating the need for additional assembly space in the display module and facilitating the thinning of the display device. Simultaneously, the outer wall of the raised bulge structure and the inner wall of the through-hole exert a certain compressive force, thereby ensuring reliable fixation between the raised bulge structure and the PCB.

Description

[Technical Field]

[0001] This application relates to the field of display technology, and in particular to a display module and display device. [Background Technology]

[0002] Liquid crystal displays (LCDs) are widely used in the market due to their advantages such as energy saving, low radiation levels, and slim and lightweight design. In LCD devices, the printed circuit board is typically mounted on a tab on the back panel.

[0003] In existing technologies, one approach is to use screws to fix the printed circuit board (PCB) to the backplate, but this requires providing clearance when assembling subsequent components, resulting in a thicker display device. Another approach is to use tape to attach the PCB to the backplate's tabs, but this leads to poor PCB stability. Therefore, a solution for fixing the PCB is urgently needed.

[0004] [Application Content]

[0005] In view of this, embodiments of this application provide a display module and a display device to solve the above problems.

[0006] In a first aspect, embodiments of this application provide a display module, including a backplate, a display panel, and a printed circuit board (PCB). The PCB is electrically connected to the display panel. The backplate includes a tongue, and the PCB is fixed on the tongue. The tongue includes a flat portion and a raised bulge structure protruding towards the PCB. The root of the raised bulge structure is connected to the flat portion. A through-hole is provided on the PCB, penetrating the PCB in the thickness direction.

[0007] The convex hull structure is interference-fitted with the through hole, and the surface of the convex hull structure away from the flat portion does not protrude from the surface of the printed circuit board away from the flat portion.

[0008] In one implementation of the first aspect, the tongue further includes a flat portion, and the cross-section of the convex hull structure in the thickness direction of the printed circuit board includes a top surface and a side surface connected to the top surface, wherein the top surface is a surface of the convex hull structure that protrudes toward one side of the printed circuit board.

[0009] The first included angle is formed between the side and the plane where the flat part is located. The opening of the first included angle is away from the convex hull structure. The first included angle is a1, and 0 < a1 < 90°.

[0010] In one implementation of the first aspect, the printed circuit board includes a conductive region that is electrically connected to a planar portion.

[0011] In one implementation of the first aspect, the display module further includes conductive adhesive, which is located between the conductive area and the flat portion, and a portion of the conductive adhesive is located between the convex structure and the sidewall of the through hole.

[0012] In one implementation of the first aspect, when the conductive adhesive is in a flat state, the conductive adhesive includes a first opening, which is corresponding to a through hole on the printed circuit board, and the size of the first opening is smaller than the size of the through hole.

[0013] In one implementation of the first aspect, when the conductive adhesive is in a flat state, the conductive adhesive also includes multiple cuts, the cuts being connected to a first opening and extending away from the first opening.

[0014] In one implementation of the first aspect, the height of the portion of the conductive adhesive located in the through-hole is no greater than the thickness of the printed circuit board.

[0015] In one implementation of the first aspect, the same through hole includes a first sub-hole and a second sub-hole that are connected. The first sub-hole is located on the side of the second sub-hole away from the plane where the flat portion is located. The convex hull structure protrudes from the second sub-hole into the first sub-hole and is connected to the sidewall of the first sub-hole.

[0016] The first sub-hole includes a first surface and a second surface that are opposite each other. The second surface is located on the side of the first surface away from the plane where the flat portion is located. Along the thickness direction of the printed circuit board, the projected area of ​​the second surface is larger than the projected area of ​​the first surface.

[0017] In one implementation of the first aspect, the cross section of the first sub-hole in the thickness direction of the printed circuit board includes opposing first and second sidewalls, the extension lines of the first and second sidewalls intersect to form a second included angle, the opening of the second included angle faces the first sub-hole, and the second included angle is a2, 60°≤a2≤120°.

[0018] In one implementation of the first aspect, the convex hull structure is a hollow structure.

[0019] In one implementation of the first aspect, the surface of the convex hull structure that protrudes toward the printed circuit board is the top surface, and the convex hull structure is also provided with a second opening that penetrates the top surface.

[0020] In one implementation of the first aspect, the outer diameter of the projection of the top surface onto the plane containing the flat portion along the thickness direction of the printed circuit board is D1; ​​the opening diameter of the through hole facing the plane containing the flat portion is D2, and 0≤D1-D2≤0.3mm.

[0021] Secondly, embodiments of this application provide a display device, including the display module as provided in the first aspect.

[0022] In this embodiment, the convex hull structure is positioned facing the printed circuit board, and the surface of the convex hull structure away from the flat portion does not protrude from the surface of the printed circuit board away from the flat portion. Therefore, when the convex hull structure is embedded in a through-hole of the printed circuit board, it can be hidden within the through-hole, eliminating the need for additional assembly space for the display module and facilitating the thinning and lightening of the display device. Furthermore, the interference fit between the convex hull structure and the through-hole ensures that when the convex hull structure is embedded in the through-hole, the outer wall of the convex hull structure and the inner wall of the through-hole exert a certain compressive force, thereby guaranteeing reliable fixation between the convex hull structure and the printed circuit board. [Attached Image Description]

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a display module provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 A schematic plan view of the backplate shown;

[0026] Figure 3 for Figure 1 A schematic plan view of the printed circuit board shown;

[0027] Figure 4 for Figure 1 A schematic cross-sectional view along the NN' tangent.

[0028] Figure 5 A cross-sectional schematic diagram of a tongue provided in an embodiment of this application;

[0029] Figure 6 This is a schematic diagram illustrating the assembly of a tongue and a printed circuit board according to an embodiment of this application.

[0030] Figure 7 This is a planar schematic diagram of a conductive adhesive provided in an embodiment of this application;

[0031] Figure 8 A schematic diagram illustrating the alignment of a tongue and a printed circuit board, provided for an embodiment of this application;

[0032] Figure 9 for Figure 1 Another schematic diagram of a cross section along the NN' tangent;

[0033] Figure 10 for Figure 9An enlarged schematic diagram of a through hole;

[0034] Figure 11 This is a planar schematic diagram of a tongue provided in an embodiment of this application;

[0035] Figure 12 for Figure 11 A cross-sectional schematic diagram of the tongue-shaped plate;

[0036] Figure 13 This is a schematic diagram of a display device provided in an embodiment of this application.

Detailed Implementation Methods

[0037] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0038] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0039] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0040] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In the description of this specification, it should be understood that the terms "substantially", "approximately", "about", "about", "roughly", "generally" and "generally" used in the claims and embodiments of this application refer to values ​​that can be generally agreed upon within a reasonable range of process operations or tolerances, rather than a precise value.

[0042] It should be understood that although terms such as "first," "second," etc., may be used to describe included angles, openings, surfaces, etc., in the embodiments of this application, these included angles, openings, surfaces, etc., should not be limited to these terms. These terms are only used to distinguish included angles, openings, surfaces, etc., from each other. For example, without departing from the scope of the embodiments of this application, a first included angle may also be referred to as a second included angle, and similarly, a second included angle may also be referred to as a first included angle.

[0043] Through meticulous and in-depth research, the applicant in this case has provided a solution to the problems existing in the prior art.

[0044] Figure 1 This is a schematic diagram of a display module provided in an embodiment of this application. Figure 2 for Figure 1 A schematic plan view of the backplate shown. Figure 3 for Figure 1 A planar schematic diagram of the printed circuit board shown. Figure 4 for Figure 1 A schematic cross-sectional view along the NN' tangent.

[0045] This application embodiment provides a display module 100, combined with... Figures 1-4 As shown, the display module 100 includes a backplate 10, a display panel 20, and a printed circuit board 30. The printed circuit board 30 is electrically connected to the display panel 20 and is used to provide display signals to the display panel 20.

[0046] The backplate 10 includes a tongue 101, on which the printed circuit board 30 is fixed. The backplate 10 may include a metal material, which can not only fix the printed circuit board 30, but also serve as a grounding terminal to release static electricity on the printed circuit board 30 and prevent the normal operation of the printed circuit board 30 from being interfered with by static electricity.

[0047] The tongue 101 includes a flat portion 101A and a convex hull structure 102 that protrudes toward the side of the printed circuit board 30. The root of the convex hull structure 102 is connected to the flat portion 101A. A through hole 301 is provided on the printed circuit board 30, and the through hole 301 penetrates the printed circuit board 30 in the thickness direction H of the printed circuit board 30.

[0048] The convex hull structure 102 is interference-fitted with the through hole 301, and the surface of the convex hull structure 102 away from the flat portion 101A does not protrude from the surface of the printed circuit board 30 away from the flat portion 101A. Of course, the maximum height h1 of the convex hull structure 102 is not greater than the thickness h2 of the printed circuit board 30.

[0049] In other words, the external dimensions of the convex hull structure 102 can be comparable to the opening size of the through hole 301. After the convex hull structure 102 is pressed into the through hole 301, a certain compressive force can be formed between the convex hull structure 102 and the inner wall of the through hole 301, so that the convex hull structure 102 can be embedded in the through hole 301 and is not easy to fall out. Moreover, the convex hull structure 102 will not protrude from the surface of the printed circuit board 30 away from the tongue 101.

[0050] Specifically, a convex structure 102 is formed by stamping the tongue 101 along a direction perpendicular to the mounting surface of the tongue 101 and the printed circuit board 30. The convex structure 102 faces the mounting surface of the tongue and the printed circuit board. A hole is punched in the printed circuit board 30 at the position corresponding to the convex structure 102, forming a through hole 301 penetrating the printed circuit board 30. The opening size of the through hole 301 is approximately the same as the outer dimensions of the convex structure 102, resulting in an interference fit between the through hole 301 and the convex structure 102.

[0051] In this embodiment, the convex hull structure 102 is positioned facing the printed circuit board 30, and the surface of the convex hull structure 102 away from the flat portion 101A does not protrude from the surface of the printed circuit board 30 away from the flat portion 101A. When the convex hull structure 102 is embedded in the through hole 301 of the printed circuit board 30, the convex hull structure 102 can be hidden in the through hole 301, without occupying additional assembly space of the display module 100, which is beneficial to achieving a thinner and lighter display device.

[0052] Meanwhile, by setting the convex hull structure 102 to be interference-fitted with the through hole 301, when the convex hull structure 102 is embedded in the through hole 301, the outer wall of the convex hull structure 102 and the inner wall of the through hole 301 form a certain compressive force, thereby ensuring that the convex hull structure 102 and the printed circuit board 30 are reliably fixed.

[0053] Figure 5 This is a cross-sectional schematic diagram of a tongue provided in an embodiment of this application.

[0054] In one embodiment of this application, such as Figure 5 As shown, the cross section of the convex hull structure 102 in the thickness direction H of the printed circuit board 30 includes a top surface 102A and a side surface 102B connected to the top surface 102A. The top surface 102A is the surface of the convex hull structure 102 that protrudes toward the side of the printed circuit board 30.

[0055] The plane containing the side surface 102B and the flat portion 101A forms a first angle, with the opening of the first angle facing away from the convex hull structure 102. The first angle is a1, where 0 < a1 < 90°. That is, the root of the convex hull structure 102 where it connects to the flat portion 101A of the tongue 101 is narrower than the top surface 102A of the convex hull structure 102. The convex hull structure 102 is a structure with a wider top surface and a narrower root.

[0056] In this embodiment, the top surface of the convex hull structure 102 is larger than the root, which allows the top surface of the convex hull structure 102 to be more tightly pressed against the sidewall of the through hole when it is embedded in the through hole 301. Moreover, the part of the convex hull structure 102 near its root can enter the through hole more easily. When the interference fit between the convex hull structure 102 and the through hole 301 is achieved, the tongue 101 can be reliably fixed to the printed circuit board 30, and the convex hull structure 102 can be more easily embedded into the through hole 301, which helps to reduce the difficulty of the assembly process.

[0057] In one embodiment of this application, please continue to refer to Figure 4 The printed circuit board 30 includes a conductive area 302, which is electrically connected to the flat portion 101A.

[0058] Specifically, the conductive area 302 is located on the side of the printed circuit board 30 facing the mounting surface with the tongue 101. When the convex structure 102 is inserted into the through hole, the conductive area 302 can fit tightly with the flat portion 101A of the tongue 101.

[0059] In this embodiment, a conductive area 302 is provided in the contact area between the printed circuit board 30 and the tongue 101. After the printed circuit board 30 is fixed by the tongue 101, the flat part 101A of the tongue 101 can be tightly attached to the conductive area 302 to form a good electrical connection. This makes the grounding impedance of the printed circuit board 30 meet the requirements, which is beneficial to meeting the anti-static requirements of the printed circuit board 30 and ensuring the normal operation of the printed circuit board 30.

[0060] Figure 6 This is a schematic diagram of the assembly of a tongue and a printed circuit board provided in an embodiment of this application.

[0061] In one embodiment of this application, such as Figure 6 As shown, the display module 100 also includes conductive adhesive 40, which is located between the conductive area 302 and the flat portion 101A. A portion of the conductive adhesive 40 is located between the convex structure 102 and the sidewall of the through hole 301, meaning that the convex structure 102 can be connected to the sidewall of the through hole 301 through the conductive adhesive 40.

[0062] Of course, the conductive adhesive 40 can be tacky on both the side near the printed circuit board 30 and the side near the tongue 101.

[0063] Optionally, the height of the portion of the conductive adhesive 40 located in the through-hole 301 is no greater than the thickness h2 of the printed circuit board 30, meaning that after a portion of the conductive adhesive 40 is squeezed into the through-hole 301, it does not protrude from the surface of the printed circuit board 30 away from the tongue 101. This helps to prevent protruding conductive adhesive 40 from overflowing onto the surface of the printed circuit board 30 away from the tongue 101, thereby preventing the conductive adhesive 40 from affecting the normal operation of the printed circuit board 30.

[0064] In this embodiment, conductive adhesive 40 is provided between the conductive area 302 of the printed circuit board 30 and the flat portion 101A of the tongue 101. On one hand, this adhesive can bond the conductive area 302 of the printed circuit board 30 to the flat portion 101A of the tongue 101, further improving the fixation effect between the printed circuit board 30 and the tongue 101. On the other hand, the conductive adhesive 40 can increase the effective contact points between the conductive area 302 and the flat portion 101A, improving the electrical connection effect between them. This helps ensure that the grounding impedance between the printed circuit board 30 and the tongue 101 is within the allowable range, meeting the anti-static requirements of the printed circuit board 30.

[0065] Furthermore, a portion of the conductive adhesive 40 is adhered between the convex structure 102 and the sidewall of the through hole 301. On one hand, this increases the adhesion between the convex structure 102 and the sidewall of the through hole 301. On the other hand, the conductive adhesive 40 has a certain thickness. When the conductive adhesive 40 is adhered to the sidewall of the through hole 301, it effectively reduces the opening size of the through hole towards the convex structure 102, thereby increasing the compressive force formed by the interference fit between the convex structure 102 and the through hole 301. This is beneficial for further improving the locking stability of the convex structure 102 inside the through hole 301, and thus further improving the fixing effect between the printed circuit board 30 and the tongue 101.

[0066] Figure 7 This is a planar schematic diagram of a conductive adhesive provided in an embodiment of this application. Figure 8 This is a schematic diagram illustrating the alignment of a tongue and a printed circuit board, provided as an embodiment of this application.

[0067] In one embodiment of this application, combined with Figure 6 , Figure 7 , Figure 8 As shown, when the conductive adhesive 40 is in a flat state, the conductive adhesive 40 includes a first opening 401, which is correspondingly provided with a through hole 301 of the printed circuit board 30, and the size of the first opening 401 is smaller than the size of the through hole 301.

[0068] For example, when both the first opening 401 and the through hole 301 are circular holes, along the thickness direction H of the printed circuit board 30, the center of the first opening 401 coincides with the center of the through hole, and the diameter of the first opening 401 is smaller than the diameter of the through hole 301.

[0069] In this embodiment, a first opening 401 is provided at the position corresponding to the conductive adhesive 40 and the through hole 301. This facilitates the insertion of the convex structure 102 into the through hole 301 through the conductive adhesive 40. At the same time, the size of the first opening 401 is smaller than the size of the through hole 301, so that in the thickness direction of the printed circuit board 30, there is still a portion of the conductive adhesive 40 at the corresponding position of the through hole 301 and the conductive adhesive 40 that has not been cut. This facilitates the insertion of the convex structure 102 into the through hole 301 along with a portion of the conductive adhesive 40 when it passes through the first opening 401 of the conductive adhesive 40, further achieving an interference fit between the convex structure 102 and the through hole 301.

[0070] In one embodiment of this application, such as Figure 7 As shown, when the conductive adhesive 40 is in a flat state, the conductive adhesive 40 also includes a plurality of cuts 402. The cuts 402 are connected to the first opening 401. The cuts 402 extend in a direction away from the first opening 401. The plurality of cuts 402 can be arranged around the first opening 401.

[0071] In this embodiment, multiple cuts 402 are provided around the first opening 401, which helps to avoid wrinkles when part of the conductive adhesive 40 is squeezed into the through hole 301, resulting in uneven extrusion pressure when the convex structure 102 and the through hole 301 are interference-fitted.

[0072] Figure 9 for Figure 1 Another schematic diagram of a cross-section along the NN' tangent. Figure 10 for Figure 9 An enlarged schematic diagram of a through hole.

[0073] In one embodiment of this application, combined with Figure 9 and Figure 10 As shown, the same through hole 301 includes a first sub-hole 301A and a second sub-hole 301B that are connected. The first sub-hole 301A is located on the side of the second sub-hole 301B away from the plane where the flat part 101A is located. The convex hull structure 102 protrudes from the second sub-hole 301B into the first sub-hole 301A and is in contact with the side wall of the first sub-hole 301A. That is, the convex hull structure 102 can be engaged on the side wall of the first sub-hole 301A.

[0074] The first sub-hole 301A includes a first surface 301A1 and a second surface 301A2. The second surface 301A2 is located on the side of the first surface 301A1 away from the plane of the flat portion 101A. Along the thickness direction H of the printed circuit board 30, the projected area of ​​the second surface 301A2 is larger than the projected area of ​​the first surface 301A1. That is, the opening size of the first sub-hole 301A on the side facing the second sub-hole 301B is smaller than the opening size on the side away from the second sub-hole 301B.

[0075] It should be noted that the opening size of the second sub-hole 301B facing the first sub-hole 301A can be the same as the opening size of the side away from the first sub-hole 301A. Of course, the opening size of the second sub-hole 301B can be the same as the size of the first surface 301A1 of the first sub-hole 301A.

[0076] Specifically, after the convex hull structure 102 protrudes into the first sub-hole 301A, the convex hull structure 102 can fit tightly against the sidewall of the first sub-hole 301A. Moreover, the flat portion 101A of the tongue 101 can fit tightly against the side of the printed circuit board 30 facing the tongue 101.

[0077] In this embodiment, the through hole 301 is formed by the combination of a first sub-hole 301A and a second sub-hole 301B. The convex hull structure 102 protrudes from the second sub-hole 301B into the first sub-hole 301A and can fit against the side wall of the first sub-hole 301A. Since the side wall of the first sub-hole 301A is an inclined structure, the convex hull structure 102 can be engaged with the side wall of the first sub-hole 301A, which helps to further fix the convex hull structure 102 in the through hole 301 and improve the fixing effect between the convex hull structure 102 and the printed circuit board 30.

[0078] Furthermore, the through hole 301 is formed by combining the first sub-hole 301A and the second sub-hole 301B, which helps to increase the diversity of the through hole 301 and thus improve the diversity of the display module 100. Moreover, the dimensions of the first sub-hole 301A and the second sub-hole 301B can be flexibly adjusted to improve the compatibility between the convex hull structure 102 and the through hole 301.

[0079] In one implementation of the embodiments of this application, please continue to refer to Figure 10 The cross section of the first sub-hole 301A in the thickness direction H of the printed circuit board 30 includes a first sidewall 301A3 and a second sidewall 301A4, which are opposite each other. The extension lines of the first sidewall 301A3 and the second sidewall 301A4 intersect to form a second included angle. The opening of the second included angle faces the first sub-hole 301A. The second included angle is a2, and 60°≤a2≤120°.

[0080] In this implementation, the second included angle a2 formed by the extension lines of the first sidewall 301A3 and the second sidewall 301A4 is within a preset range. Therefore, the inclination of the sidewall of the first sub-hole 301A can be determined according to the size of the second included angle a2, which helps to ensure that the convex hull structure 102 can smoothly protrude into the first sub-hole 301A, and after entering the first sub-hole 301A, the convex hull structure 102 can be stably engaged on the sidewall of the first sub-hole 301A.

[0081] In one embodiment of this application, such as Figures 4-6 , Figure 9As shown, the convex hull structure 102 is a hollow structure. That is, the interior of the convex hull structure 102 is a cavity.

[0082] In this embodiment, the convex hull structure 102 is set as a hollow structure, so it can be directly formed by stamping using the flat part of the tongue 101, without the need to use additional metal materials to make the convex hull structure 102, which helps to save material costs and simplify the process.

[0083] Furthermore, by setting the convex hull structure 102 as a hollow structure, it is possible to avoid the situation where rigid compression is formed between the convex hull structure 102 and the through hole 301 without any buffer space. This is conducive to achieving an interference fit between the convex hull structure 102 and the through hole 301, and to prevent the printed circuit board 30 from deforming due to compression.

[0084] Figure 11 This is a planar schematic diagram of a tongue provided in an embodiment of this application. Figure 12 for Figure 11 A schematic cross-sectional view of the tongue.

[0085] In one embodiment of this application, combined with Figures 11-12 As shown, the surface of the convex hull structure 102 that protrudes towards the printed circuit board 30 is the top surface 102A. The convex hull structure 102 is also provided with a second opening 103, which penetrates the top surface 102A. That is, a second opening 103 is opened on the top surface 102A, and the second opening 103 is connected to the cavity inside the convex hull structure 102.

[0086] Optionally, the second opening 103 extends from the top surface 102A to the side surface 102B of the convex hull structure 102.

[0087] In this embodiment of the application, a second opening 103 is provided on the top surface 102A of the convex hull structure 102, which can further increase the assembly toughness of the convex hull structure 102. When the convex hull structure 102 and the through hole 301 are in an interference fit, it is beneficial to reduce the squeezing of the printed circuit board 30, thereby helping to avoid deformation and damage of the printed circuit board 30 during the interference fit process.

[0088] In one embodiment of this application, such as Figure 8 As shown, along the thickness direction H of the printed circuit board 30, the outer diameter of the projection of the top surface 102A onto the plane where the flat portion 101A is located is D1; ​​the opening diameter of the through hole 301 facing the plane where the flat portion 101A is located is D2, and 0≤D1-D2≤0.3mm.

[0089] It should be noted that, in the convex hull structure 102 here, the outer diameter D1 of the top surface 102A refers to the outer diameter of the top surface 102A of the convex hull structure 102 before the through hole 301 is inserted into the convex hull structure 102.

[0090] In this embodiment, the difference between the outer diameter D1 of the top surface 102A of the convex hull structure 102 and the opening diameter D2 of the through hole 301 is set within a preset range. This ensures that the convex hull structure 102 and the sidewall of the through hole 301 are tightly fitted after the convex hull structure 102 is embedded in the through hole 301. It also avoids the problem that the convex hull structure 102 is difficult to embed in the through hole 301 due to a large difference between D1 and D2. This helps to reduce the difficulty of interference fit between the convex hull structure 102 and the through hole 301.

[0091] Figure 13 This is a schematic diagram of a display device provided in an embodiment of this application.

[0092] This application provides a display device 300, such as... Figure 13 As shown, the display device 300 includes the display module 100 provided in the above embodiments. The display device 300 provided in this application embodiment can be an in-vehicle display. In addition, the display device 300 can also be an electronic device such as a computer, television, or mobile phone.

[0093] In the display device 300, a convex hull structure 102 is provided facing the printed circuit board 30, and the surface of the convex hull structure 102 away from the flat portion 101A does not protrude from the surface of the printed circuit board 30 away from the flat portion 101A. Therefore, when the convex hull structure 102 is embedded in the through hole 301 of the printed circuit board 30, the convex hull structure 102 can be hidden within the through hole 301, without requiring additional assembly space for the display module 100, which is beneficial for achieving a thinner and lighter display device. Simultaneously, the interference fit between the convex hull structure 102 and the through hole 301 ensures that when the convex hull structure 102 is embedded in the through hole, the outer wall of the convex hull structure 102 and the inner wall of the through hole 301 form a certain compressive force, thereby ensuring reliable fixation between the convex hull structure 102 and the printed circuit board 30.

[0094] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display module, characterized by The display module comprises a back plate, a display panel and a printed circuit board, the printed circuit board is electrically connected with the display panel; the back plate comprises a tongue, and the printed circuit board is fixed on the tongue; The tongue comprises a flat portion and a convex structure which is convex towards a side of the printed circuit board, a root of the convex structure is connected with the flat portion, a through hole is arranged on the printed circuit board, the through hole penetrates the printed circuit board in the thickness direction of the printed circuit board; the printed circuit board comprises a conductive area, the conductive area is electrically connected with the flat portion; The display module further comprises conductive glue, the conductive glue is located between the conductive area and the flat portion, and part of the conductive glue is located between the convex structure and the side wall of the through hole; when the conductive glue is in a flat state, the conductive glue comprises a first opening, the first opening is arranged corresponding to the through hole of the printed circuit board, and the size of the first opening is smaller than the size of the through hole; when the conductive glue is in a flat state, the conductive glue further comprises a plurality of cutting portions, the cutting portions are communicated with the first opening, and the cutting portions extend away from the first opening; The convex structure is in interference fit with the through hole, and the surface of the convex structure away from the flat portion does not protrude from the surface of the printed circuit board away from the flat portion.

2. The display module of claim 1, wherein, The cross section of the convex structure in the thickness direction of the printed circuit board comprises a top surface and a side surface connected with the top surface, and the top surface is the surface of the convex structure convex towards the side of the printed circuit board; The first included angle is formed between the side surface and the plane where the flat portion is located, the opening of the first included angle is away from the convex structure, and the first included angle is a1, 0 3. The display module of claim 1, wherein, The height of the part of the conductive glue in the through hole is not greater than the thickness of the printed circuit board.

4. The display module of claim 1, wherein, The same through hole comprises a first sub-hole and a second sub-hole which are communicated, the first sub-hole is located on the side of the second sub-hole away from the plane where the flat portion is located, the convex structure is convex from the second sub-hole to the first sub-hole, and is connected with the side wall of the first sub-hole; The first sub-hole comprises opposite first and second surfaces, the second surface is located on the side of the first surface away from the plane where the flat portion is located, and the projection area of the second surface is greater than the projection area of the first surface in the thickness direction of the printed circuit board.

5. The display module of claim 4, wherein, The cross section of the first sub-hole in the thickness direction of the printed circuit board comprises opposite first and second side walls, the second included angle is formed by the intersection of the extensions of the first and second side walls, the opening of the second included angle is towards the first sub-hole, and the second included angle is a2, 60°≤a2≤120°.

6. The display module of claim 1, wherein, The convex structure is a hollow structure.

7. The display module of claim 6, wherein, The surface of the convex structure convex towards the side of the printed circuit board is a top surface, and a second opening is further arranged on the convex structure, and the second opening penetrates the top surface.

8. The display module of claim 2, wherein, The projection outer diameter of the top surface in the plane of the flat portion along the thickness direction of the printed circuit board is D1; the opening aperture of the through hole toward the plane of the flat portion is D2, 0≤D1-D2≤0.3mm.

9. A display device, characterized by comprising: The display module comprises the display module as claimed in any one of claims 1-8.

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