Display module and its preparation method

Abstract

The present application discloses a display module and a manufacturing method thereof. The display module includes: a display panel including an array substrate and a counter substrate disposed opposite to each other; a backlight module including a back plate and an optical component, the back plate enclosing to form an accommodation space, and the optical component being disposed in the accommodation space; a composite middle frame disposed between the backlight module and the display panel and connecting the backlight module and the display panel, the composite middle frame including a glass member and a plastic member connected to each other, and the composite middle frame being prepared by a two-shot molding process; wherein, the display module has a welding area, in the welding area, the display panel and the glass member are fixedly connected by a laser welding process, and the plastic member is connected to the back plate. Through the above arrangement, the problem of insufficient waterproof and dustproof capabilities of the display module in the prior art is solved, enabling it to work normally in water or a high-dust environment, meeting the requirements in special environments, and being beneficial to reducing costs, extending the service life, improving the display effect and the user experience.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display module and a method for manufacturing the same. Background Art

[0002] With the development of technology, various electronic devices such as mobile phones and tablet computers have become an indispensable part of people's daily lives. These devices usually have a display module for displaying images and information. However, during use, the display module is often affected by water and dust, thereby affecting its display effect and service life.

[0003] In the prior art, rubber rings and other materials are mainly used to seal the display module to achieve the purpose of waterproofing and dustproofing. However, rubber rings are prone to aging, have a short service life, and need to be replaced regularly. The waterproof and dustproof capabilities of the display module are limited, the cost is high, and it cannot meet the requirements in some special environments. Summary of the Invention

[0004] The present application mainly provides a display module and a method for manufacturing the same to solve the problem of insufficient waterproof and dustproof capabilities of the display module in the prior art.

[0005] To solve the above technical problems, one technical solution adopted by the present application is: to provide a display module, including:

[0006] A display panel, including an array substrate and a counter substrate arranged opposite to each other;

[0007] A backlight module, including a backplane and an optical component; the backplane encloses to form a receiving space, and the optical component is disposed in the receiving space;

[0008] A composite middle frame, disposed between the backlight module and the display panel and connecting the backlight module and the display panel; the composite middle frame includes a glass part and a plastic part connected to each other, and the composite middle frame is prepared by a two-step molding process;

[0009] Wherein, the display module has a welding area, in the welding area, the display panel and the glass part are fixedly connected by a laser welding process; the plastic part is connected to the backplane.

[0010] In some embodiments, the plastic part includes a body part and a support part, both the body part and the support part are annular; the body part extends along the thickness direction of the display module, and the support part is connected to the inner side surface of the body part; the support part is located between the display panel and the backlight module;

[0011] The glass member is located on a side of the support portion close to the display panel and is partially embedded in the support portion; the glass member is annular, the glass member has a first surface facing away from the backlight module, and the plastic member wraps the glass member and exposes the first surface;

[0012] The orthographic projection of the welding area is located within the first surface.

[0013] In some embodiments, the welding area is annular;

[0014] The array substrate is located on a side of the opposing substrate close to the backlight module. In the welding area, the array substrate and the glass member are fixedly connected by a laser welding process.

[0015] In some embodiments, the welding area is annular;

[0016] The array substrate is located on a side of the opposing substrate facing away from the backlight module. Along a first direction, the size of the array substrate is larger than that of the opposing substrate. The array substrate protrudes from the opposing substrate to form a protruding portion, and the orthographic projection of the protruding portion is at least partially located within the first surface;

[0017] Along the circumferential direction of the display panel, in a part of the welding area corresponding to the protruding portion, the array substrate and the glass member are fixedly connected by a laser welding process. In the remaining welding area, the opposing substrate and the glass member are fixedly connected by a laser welding process.

[0018] In some embodiments, the protruding portion includes a bonding area, the orthographic projection of the bonding area is located within the first surface, and in the first direction, the bonding area is located on a side of the welding area away from the body portion;

[0019] The array substrate includes a driving circuit layer. The array substrate has a second surface facing the opposing substrate, and a first contact pad is provided at a position corresponding to the bonding area on the second surface. The first contact pad is electrically connected to the driving circuit layer;

[0020] A second contact pad is provided at a position corresponding to the bonding area on the first surface; the display module further includes a flexible circuit board and a conductive adhesive. One end of the flexible circuit board is electrically connected to the second contact pad; the conductive adhesive is disposed between the array substrate and the glass member and electrically connects the first contact pad and the second contact pad.

[0021] In some embodiments, one end of the support portion away from the body portion has a notch provided at a position corresponding to the second contact pad;

[0022] The display module further includes a rear case and a logic component. The rear case is disposed on a side of the backplane away from the display panel, and the logic component is disposed within the rear case; the logic component includes a connector;

[0023] The other end of the flexible circuit board sequentially extends into the rear case via the notch and the gap between the backplane and the optical component, and is electrically connected to the connector;

[0024] A driving chip is disposed on the flexible circuit board.

[0025] In some embodiments, the backplane includes a bottom plate and an annular side plate. The annular side plate is connected to a side of the bottom plate close to the display panel, and encloses the accommodation space with the bottom plate;

[0026] The body portion is disposed around the outside of the annular side plate.

[0027] In some embodiments, the annular side plate includes a stepped portion and a vertically extending portion. The stepped portion connects the bottom plate and the vertically extending portion; the body portion is located at the top of the stepped portion and disposed around the vertically extending portion, and an inner side surface of the body portion is attached to an outer side surface of the vertically extending portion;

[0028] The display module further includes a first sealing ring. The first sealing ring is disposed between the stepped portion and the body portion and around the vertically extending portion.

[0029] In some embodiments, when laser welding the display panel and the glass member in the welding area, a laser with a wavelength of 1064 nm and an average power of 50 w is used; the welding speed is 3 - 8 mm / S; and / or,

[0030] The welding depth of the display panel and the glass member is 0.2 - 0.5 mm; and / or,

[0031] The display module further includes a first polarizer and a second polarizer. The first polarizer is disposed on a side of the counter substrate away from the array substrate, and the second polarizer is disposed on a side of the array substrate away from the counter substrate.

[0032] To solve the above technical problems, another technical solution adopted by this application is: to provide a method for manufacturing a display module, including:

[0033] A display panel, a backlight module, and a composite middle frame are provided. Among them, the display panel includes an array substrate and a counter substrate disposed opposite to each other; the backlight module includes a back plate and an optical component; the back plate encloses to form a receiving space, and the optical component is disposed in the receiving space; the composite middle frame includes a glass part and a plastic part connected to each other, and the composite middle frame is prepared by a two-shot molding process.

[0034] Place the display panel on one side of the composite middle frame, and use a laser to perform laser welding on the display panel and the glass part in the welding area.

[0035] Integrally assemble the welded display panel and the composite middle frame onto the backlight module, and connect the plastic part to the back plate.

[0036] Perform a waterproof and dustproof test and a light aging test. Among them, the test environment of the waterproof and dustproof test is a simulated heavy rain environment, and the test duration is 2 h; the test conditions of the light aging test are: first irradiate with ultraviolet light for 120 h, and then place it under the conditions of 85 °C and 85% RH for 500 h.

[0037] The beneficial effects of this application are as follows: Different from the prior art, this application discloses a display module and a preparation method thereof. The display module includes: a display panel, including an array substrate and a counter substrate disposed opposite to each other; a backlight module, including a back plate and an optical component, the back plate encloses to form a receiving space, and the optical component is disposed in the receiving space; a composite middle frame, disposed between the backlight module and the display panel and connecting the backlight module and the display panel, the composite middle frame includes a glass part and a plastic part connected to each other, and the composite middle frame is prepared by a two-shot molding process. Among them, the display module has a welding area, in which the display panel and the glass part are fixedly connected by a laser welding process, and the plastic part is connected to the back plate. By setting the composite middle frame to include a glass part and a plastic part, and welding and fixing the display panel and the glass part of the composite middle frame by a laser welding process, a full-range seal of the display module can be achieved, greatly improving the waterproof and dustproof performance of the display module, enabling it to work normally in water or a high-dust environment, and meeting the requirements in special environments; moreover, the laser welding method has better anti-aging ability, ensuring the durability of the sealing effect, avoiding the problem of the sealing effect decreasing due to the aging of materials such as rubber gaskets, extending the service life of the display module, improving the display effect, and enhancing the user experience; at the same time, there is no need to set rubber gaskets and other sealing parts between the display panel and the glass part of the composite middle frame for sealing, and there is no need to replace the rubber gaskets regularly, reducing costs, and effectively solving the problem of insufficient waterproof and dustproof ability of the display module in the prior art. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0039] Figure 1 is a schematic structural diagram of a display module provided by the first embodiment of the present application;

[0040] Figure 2 is Figure 1 a top view structural diagram of a composite middle frame of the provided display module;

[0041] Figure 3 is Figure 2 an A-A cross-sectional view of the provided composite middle frame;

[0042] Figure 4 is a schematic structural diagram of a display module provided by the second embodiment of the present application;

[0043] Figure 5 is Figure 4 a top view structural diagram of a composite middle frame of the provided display module;

[0044] Figure 6 is Figure 5 a C-C cross-sectional view of the provided composite middle frame;

[0045] Figure 7 is Figure 4 a bonding structure diagram of a composite middle frame and a flexible circuit board of the provided display module;

[0046] Figure 8 is Figure 4 a partial enlarged view of area D in;

[0047] Figure 9 is a schematic flowchart of a preparation method of a display module provided by the third embodiment of the present application.

[0048] Reference numerals in the drawings:

[0049] Display module 100; display panel 1; array substrate 11; protrusion 111; second surface 112; first contact pad 113; counter substrate 12; backlight module 2; backplane 21; bottom plate 211; annular side plate 212; step portion 213; vertically extending portion 214; optical component 22; accommodation space 23; composite middle frame 3; glass member 31; first surface 311; plastic member 32; body portion 321; support portion 322; second contact pad 33; conductive adhesive 34; notch 35; first sealing ring 4; rear case 5; logic component 6; connector 61; flexible circuit board 7; second sealing ring 8; first polarizer 91; second polarizer 92; welding area H; bonding area B. Detailed implementation manners

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0051] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes unlisted steps or units, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0052] Referring to

[0053] See Figures 1 to 3 , Figure 1 is a schematic structural diagram of a display module provided by the first embodiment of the present application. Figure 2 is Figure 1Schematic top view structure diagram of the composite middle frame of the provided display module Figure 3 is Figure 2 Schematic diagram of the A-A cross-section of the provided composite middle frame.

[0054] See Figure 1 , this application provides a display module 100, which includes a display panel 1, a backlight module 2, and a composite middle frame 3.

[0055] See Figures 1 to 3 , the display panel 1 includes an array substrate 11 and a counter substrate 12 arranged oppositely, and a liquid crystal layer (not shown in the figure) disposed between the array substrate 11 and the counter substrate 12. The array substrate 11 and the counter substrate 12 are connected by a frame adhesive (not shown in the figure). The backlight module 2 includes a back plate 21 and an optical component 22. The back plate 21 surrounds to form a receiving space 23, and the optical component 22 is disposed in the receiving space 23. The composite middle frame 3 is disposed between the backlight module 2 and the display panel 1 and connects the backlight module 2 and the display panel 1. Specifically, the composite middle frame 3 includes a glass part 31 and a plastic part 32 connected to each other, and the composite middle frame 3 is prepared by a two-shot molding process. The display module 100 has a welding area H. In the welding area H, the display panel 1 and the glass part 31 of the composite middle frame 3 are fixedly connected by a laser welding process, the plastic part 32 is connected to the back plate 21, and the display panel 1 and the backlight module 2 are fixedly connected through the composite middle frame 3.

[0056] It can be understood that in this application, by setting the composite middle frame 3 to include a glass part 31 and a plastic part 32, the composite middle frame 3 is prepared by a two-shot molding process, and the display panel 1 and the glass part 31 of the composite middle frame 3 are welded and fixed by a laser welding process, and the display panel 1 is laser-welded on the two-shot molded composite middle frame 3, a full-range sealing of the display module 100 can be achieved, greatly improving the waterproof and dustproof performance of the display module 100, enabling it to work normally in water or a high-dust environment, meeting the requirements in special environments, and effectively preventing the influence of water and dust on the display module 100 during use, improving the display effect and the user experience; and compared with traditional rubber ring sealing and other methods, the laser welding method has better anti-aging ability. The glass part 31 of the composite middle frame 3 and the display panel 1 are both made of glass material and are not easy to age, ensuring the durability of the sealing effect and avoiding the problem of the sealing effect decreasing due to the aging of materials such as rubber rings; and because the laser welding method has better anti-aging ability and stability, the service life of the display module 100 can be extended. At the same time, there is no need to set rubber rings and other sealing parts between the display panel 1 and the glass part 31 of the composite middle frame 3 for sealing, and there is no need to replace the rubber ring regularly, reducing the production cost and effectively solving the problem of insufficient waterproof and dustproof ability of the display module 100 in the prior art.

[0057] Specifically, asFigure 2 and Figure 3 As shown in Figure 3 , in some embodiments, the plastic part 32 of the composite middle frame 3 includes a main body part 321 and a support part 322. Both the main body part 321 and the support part 322 are annular. Specifically, both the main body part 321 and the support part 322 are in the shape of a rectangular ring, and the main body part 321 is correspondingly arranged around the display panel 1. The main body part 321 extends along the thickness direction of the display module 100. The support part 322 is connected to the inner side surface of the main body part 321, and the support part 322 is located between the display panel 1 and the backlight module 2. The support part 322 is used to support the display panel 1.

[0058] See Figures 1 to 3 , in some embodiments, the glass part 31 of the composite middle frame 3 is located on the side of the support part 322 close to the display panel 1 and partially embedded in the support part 322. The glass part 31 is annular. Specifically, as shown in Figure 2 Figure 2 , the glass part 31 is in the shape of a rectangular ring and is correspondingly arranged at the edge of the display panel 1. Among them, the glass part 31 has a first surface 311 facing away from the backlight module 2. The plastic part 32 wraps the glass part 31 and exposes the first surface 311. In some embodiments, the plastic part 32 may wrap a part of the first surface 311 of the glass part 31, or may expose a part of the inner side surface of the glass part 31. For example, the main body part 321 may wrap a part of the first surface 311 of the glass part 31, only exposing a part of the first surface 311, and the support part 322 may wrap a part of the inner side surface of the glass part 31 (i.e., the surface of the glass part 31 away from the main body part 321), so that a part of the inner side surface of the glass part 31 is exposed, that is, the first surface 311 of the glass part 31 is located on the side of the support part 322 close to the display panel 1.

[0059] The composite middle frame 3 is prepared by a two - step molding process. Specifically, the glass part 31 can be prepared first, and then the glass part 31 is placed in a mold for injection molding to form a plastic part 32 having a main body part 321 and a support part 322, which wraps the glass part 31 and exposes the first surface 311 of the glass part 31.

[0060] In some embodiments, the orthographic projection of the welding area H of the display module 100 is located within the first surface 311. That is, when welding the display panel 1 and the glass part 31 of the composite middle frame 3 in the welding area H, the position where the display panel 1 and the glass part 31 are melted and combined corresponds to be located within the first surface 311, rather than at the corresponding position on the inner side surface of the glass part 31. In some embodiments, the welding area H is annular and is correspondingly arranged at the edge position of the display panel 1.

[0061] In this embodiment, the array substrate 11 is located on the side of the counter substrate 12 close to the backlight module 2, that is, the array substrate 11 is located on the light incident side of the display panel 1, and the counter substrate 12 is located on the light exiting side of the display panel 1. In the thickness direction of the display module 100, the counter substrate 12 is located on top of the array substrate 11.

[0062] In the welding area H, the array substrate 11 and the glass member 31 are fixedly connected by a laser welding process. That is, the surface of the array substrate 11 close to the glass member 31 (i.e., the surface facing away from the counter substrate 12) is attached to the first surface 311 of the glass member 31. When laser welding the display panel 1 and the glass member 31 in the welding area H, a part of the glass at the attachment position of the array substrate 11 and the glass member 31 melts and combines, so that the side of the array substrate 11 facing away from the counter substrate 12 is connected to the glass member 31, thereby fixedly connecting the composite middle frame 3 and the array substrate 11 of the display panel 1.

[0063] Since the welding area H is annular, it is possible to perform all-round sealing between the display panel 1 and the composite middle frame 3 in the circumferential direction of the display module 100, effectively preventing water vapor or dust from entering the display module 100 through the gap between the display panel 1 and the composite middle frame 3 and affecting the display effect and service life of the display module 100, which is beneficial to improving the waterproof and dustproof performance of the display module 100. There is no need to use a sealing material such as a rubber ring to seal between the composite middle frame 3 and the display panel 1, there is no need to replace the rubber ring regularly, and there is no problem of the sealing effect decreasing due to the aging of the rubber ring.

[0064] In some embodiments, when laser welding the display panel 1 and the glass member 31 in the welding area H, a laser with a wavelength of 1064 nm and an average power of 50 w is used, and the welding speed during laser welding is 3 - 8 mm / S. Preferably, the welding speed during laser welding is 5 mm / S. Using the above parameters for laser welding, the welding effect is better, the display panel 1 and the glass member 31 are not easily broken, and it will not have an adverse impact on the display effect of the display module 100.

[0065] In some embodiments, the welding depth between the display panel 1 and the glass member 31 is 0.2 - 0.5 mm. The welding depth refers to the thickness of the weld formed by the melting of the glass at the welding position between the display panel 1 and the glass member 31. It can be understood that setting the welding depth between the display panel 1 and the glass member 31 within the range of 0.2 - 0.5 mm can avoid excessive welding depth from affecting the structural strength and display performance of the array substrate 11. At the same time, it can also avoid too small welding depth, resulting in ineffective welding between the display panel 1 and the glass member 31, unable to achieve stable connection, and causing water vapor or dust to enter the display module 100 and affect the display performance.

[0066] In some embodiments, along the first direction, the size of the array substrate 11 is larger than that of the counter substrate 12. The array substrate 11 protrudes from the counter substrate 12 to form a protruding portion 111, and at least a part of the orthographic projection of the protruding portion 111 is located within the first surface 311. The protruding portion 111 includes a bonding area B. In this embodiment, the orthographic projection of the bonding area B can be located within the first surface 311 or partially outside the first surface 311. Components are bonded to the part of the surface of the array substrate 11 close to the counter substrate 12 (i.e., the top surface of the array substrate 11) within the bonding area B. Since the bonding position of the components is on the surface of the array substrate 11 close to the counter substrate 12, while the welding position of the display panel 1 and the glass member 31 is on the surface of the array substrate 11 facing away from the counter substrate 12 (i.e., the bottom surface of the array substrate 11), when welding the array substrate 11 and the glass member 31 in the welding area H, it will not affect the bonding of the components within the bonding area B of the array substrate 11. Therefore, in this embodiment, the positions of the bonding area B and the welding area H do not affect each other and can be set arbitrarily. In other embodiments, the size of the array substrate 11 can also be equal to that of the counter substrate 12.

[0067] In a specific embodiment, the size of the display panel 1 is 14 inches, and the outer frame size of the composite middle frame 3 is 14.2 inches. The thickness of the body portion 321 of the composite middle frame 3 is 0.3 - 2 mm. Preferably, the thickness of the body portion 321 of the composite middle frame 3 is 1.5 mm; the thickness of the glass member 31 is 0.3 - 0.8 mm, and the thickness of the support portion 322 of the composite middle frame 3 is 0.2 - 1.2 mm. Preferably, the thickness of the glass member 31 is 0.7 mm, and the thickness of the support portion 322 of the composite middle frame 3 is 0.8 mm, making the structure of the composite middle frame 3 more stable and having higher structural strength.

[0068] In other embodiments, the display panel 1 and the composite middle frame 3 can also be set to other sizes, and the thicknesses of the body portion 321, the support portion 322 of the composite middle frame 3, and the glass member 31 can also be set to other values, which can be designed according to needs.

[0069] Specifically, in some embodiments, the optical component 22 of the backlight module 2 is disposed in the accommodation space 23 formed by enclosing the backplane 21. The optical component 22 includes a light source (not shown in the figure) and an optical film (not shown in the figure). The optical film can include structures such as a diffusion sheet (not shown in the figure), a light guide plate (not shown in the figure), a reflection sheet (not shown in the figure), etc. The light source can be a lamp board or a lamp strip. Specifically, the light source can be an LED, a MINI-led, or other light-emitting elements. In some embodiments, the optical component 22 further includes a support member (not shown in the figure), and the support member supports the optical film to prevent the optical film from sagging and affecting the display effect. The backlight module 2 can be a side-entry backlight module 2 or a direct-lit backlight module 2, which can be designed according to needs.

[0070] As Figure 1 shown, in some embodiments, the backplane 21 includes a bottom plate 211 and an annular side plate 212. The annular side plate 212 is connected to the side of the bottom plate 211 close to the display panel 1 and encloses a receiving space 23 with the bottom plate 211. The body portion 321 is disposed around the outer side of the annular side plate 212, and the supporting portion 322 is located between the annular side plate 212 and the display panel 1. Specifically, the body portion 321 of the plastic part 32 of the composite middle frame 3 is sleeved on the outer side surface of the annular side plate 212 of the backplane 21, and the outer side surface of the annular side plate 212 is attached to the inner side surface of the body portion 321. The surface of the supporting portion 322 away from the display panel 1 abuts and is attached to the end surface of the annular side plate 212 away from the bottom plate 211. It can be understood that by disposing the body portion 321 of the composite middle frame 3 around the outer side of the annular side plate 212, that is, the backplane 21 of the backlight assembly is disposed inside the body portion 321 of the plastic part 32 of the composite middle frame 3. By externalizing the plastic part 32 of the composite middle frame 3, when there is a problem with the display module 100 that needs to be repaired, it is not necessary to separately disassemble the display panel 1. It can be achieved by removing the connection between the plastic part 32 of the composite middle frame 3 and the backplane 21. The above setting is more convenient for repairing the display module 100.

[0071] Specifically, as Figure 1 shown, in some embodiments, the annular side plate 212 of the backplane 21 includes a stepped portion 213 and a vertically extending portion 214. The stepped portion 213 connects the bottom plate 211 and the vertically extending portion 214. The body portion 321 of the plastic part 32 of the composite middle frame 3 is located at the top of the stepped portion 213 and is disposed around the vertically extending portion 214, and the inner side surface of the body portion 321 is attached to the outer side surface of the vertically extending portion 214. Among them, the body portion 321 of the plastic part 32 of the composite middle frame 3 and the annular side plate 212 of the backplane 21 are locked and connected by structural parts such as screws to complete the fixed connection between the backplane 21 and the composite middle frame 3.

[0072] Furthermore, in some embodiments, the display module 100 further includes a first sealing ring 4. The first sealing ring 4 is disposed between the stepped portion 213 and the body portion 321 and is disposed around the vertically extending portion 214. The surface of the body portion 321 close to the stepped portion 213 abuts against the first sealing ring 4, and the first sealing ring 4 is squeezed by the stepped portion 213 and the body portion 321. It can be understood that by providing the first sealing ring 4 disposed around the vertically extending portion 214 between the stepped portion 213 and the body portion 321, the plastic part 32 of the composite middle frame 3 and the backplane 21 of the backlight module 2 can be sealed, which is beneficial to preventing moisture or dust from entering the inside of the display module 100 through the gap between the composite middle frame 3 and the backplane 21 and thus affecting the display performance, and further improving the waterproof and dustproof effect of the display module 100. Among them, the first sealing ring 4 can be made of materials such as silica gel and rubber.

[0073] In some embodiments, the display module 100 further includes a rear case 5 and a logic component 6. The rear case 5 is disposed on a side of the backplane 21 of the backlight module 2 away from the display panel 1 and is fixedly connected to the backplane 21. The logic component 6 is disposed in a space formed by enclosing the rear case 5 and the backplane 21. The logic component 6 includes a connector 61. The logic component 6 is configured to drive and control the display panel 1 to implement a display function. Among them, the rear case 5 and the bottom plate 211 of the backplane 21 are locked and connected by structural members such as screws to complete the fixed connection between the backplane 21 and the rear case 5.

[0074] In some embodiments, the display module 100 further includes a flexible circuit board 7. The surface of the array substrate 11 facing the counter substrate 12 is the second surface 112 (i.e., the top surface of the array substrate 11). The array substrate 11 includes a driving circuit layer (not shown in the figure). The driving circuit layer is disposed on the second surface 112 of the array substrate 11. One end of the flexible circuit board 7 is electrically connected to the driving circuit layer disposed on the second surface 112 of the array substrate 11, and the other end is bent to one side of the backplane 21 of the backlight module 2 and is electrically connected to the connector 61 of the logic component 6 disposed in the rear case 5, thereby realizing the electrical connection between the driving circuit layer and the logic component 6 and facilitating driving and controlling the display panel 1 to implement a display function. In some embodiments, a driving chip (not shown in the figure) may be disposed on the flexible circuit board 7.

[0075] Specifically, in some embodiments, a first contact pad 113 is disposed at a position of the second surface 112 of the array substrate 11 corresponding to the bonding area B. The first contact pad 113 is electrically connected to the driving circuit layer. One end of the flexible circuit board 7 is electrically connected to the first contact pad 113, thereby realizing the electrical connection with the driving circuit layer.

[0076] Specifically, in some embodiments, the display module 100 further includes a second sealing ring 8. The second sealing ring 8 is disposed between the rear case 5 and the backplane 21. The surface of the rear case 5 close to the backplane 21 abuts against the second sealing ring 8, so that the second sealing ring 8 is squeezed by the rear case 5 and the backplane 21. The second sealing ring 8 can seal between the rear case 5 and the backplane 21, which is beneficial to preventing moisture or dust from entering the interior of the rear case 5 through the gap between the rear case 5 and the backplane 21 and affecting the performance of the logic component 6, and further improving the waterproof and dustproof effect of the display module 100. Among them, the second sealing ring 8 can be made of materials such as silica gel and rubber.

[0077] In some embodiments, the display module 100 further includes a first polarizer 91 and a second polarizer 92. The first polarizer 91 is disposed on the side of the counter substrate 12 away from the array substrate 11, that is, the first polarizer 91 is disposed on the light-emitting side, and the second polarizer 92 is disposed on the side of the array substrate 11 away from the counter substrate 12, that is, the second polarizer 92 is disposed on the light-incident side. Specifically, the first polarizer 91 can be used for polarization, and the second polarizer 92 can be used for polarization analysis.

[0078] In this embodiment, when assembling the display module 100, the display panel 1 and the composite middle frame 3 can be assembled in alignment first, and the array substrate 11 of the display panel 1 and the glass part 31 of the composite middle frame 3 can be fixed by laser welding. After laser welding the glass part 31 of the display panel 1 and the composite middle frame 3, the welding part can be inspected to ensure the welding quality and ensure that there are no defects such as air holes, cracks, discontinuities, etc. at the welding position. After welding is completed, the assembly of the backlight module 2, such as the back plate 21 and the optical component 22, is carried out. The first sealing ring 4 is assembled to one side of the step part 213 of the backlight module 2, and then the assembled backlight module 2 is assembled to the plastic part 32 of the display panel 1 and the composite middle frame 3 that has been welded, and the plastic part 32 of the composite middle frame 3 and the back plate 21 are locked by locking parts such as screws to ensure that the first sealing ring 4 is squeezed. The bonding of the flexible circuit board 7 to the array substrate 11 and the electrical connection between the flexible circuit board 7 and the connector 61 of the logic component 6 can be carried out after the above assembly steps are completed, and the assembly and locking between the rear shell 5 and the back plate 21 can be carried out after the bonding of the flexible circuit board 7 is completed.

[0079] In some embodiments, after the display module 100 is assembled, the assembled display module 100 can be subjected to waterproof and dustproof tests and light aging tests.

[0080] Specifically, the test environment for the waterproof and dustproof test can be a simulated heavy rain environment, and the test duration is 2h. The inventors of the present application used the structure of the display module 100 in this embodiment to perform the above waterproof and dustproof test. The test results show that no water ingress or dust ingress occurred in the display module 100, proving that the display module 100 has good waterproof and dustproof performance. The structure of the display module 100 in this embodiment can still achieve good waterproof and dustproof performance in special environments such as outdoor activities, diving, and mines, and can meet the requirements of special usage scenarios.

[0081] Specifically, the test conditions of the light aging test are: first irradiate with ultraviolet light for 120 hours, and then place it under the conditions of 85°C and 85% RH (relative humidity) for 500 hours. The inventor of the present application uses the structure of the display module 100 of this embodiment to perform the above light aging test. The test results show that the performance of the display module 100 has not been significantly reduced, proving that the display module 100 has good anti-aging performance.

[0082] The display module 100 structure provided in this embodiment can effectively improve the waterproof and dustproof performance of the display module 100, extend its service life, reduce the use cost, and has great market potential.

[0083] See also Figures 4 to 8 , Figure 4 is a structural schematic diagram of a display module provided in the second embodiment of the present application, Figure 5 yes Figure 4 A schematic diagram of the top view structure of the composite middle frame of the display module provided, Figure 6 yes Figure 5 The CC cross-section diagram of the composite middle frame provided, Figure 7 yes Figure 4 The schematic diagram of the bonding structure between the composite middle frame and the flexible circuit board of the display module provided. Figure 8 yes Figure 4 A partial enlarged schematic diagram of area D in the middle.

[0084] See also Figures 4 to 8 The second embodiment of the present application provides another display module 100. Different from the display module 100 of the first embodiment, in this embodiment, the array substrate 11 of the display panel 1 of the display module 100 is located on the side of the counter substrate 12 away from the backlight module 2, that is, in this embodiment, the array substrate 11 is located on the light emitting side, and the counter substrate 12 is located on the light incident side. In this embodiment, along the circumference of the display panel 1, part of the glass member 31 is welded and fixed to the counter substrate 12, and the other part is welded and fixed to the array substrate 11.

[0085] Specifically, Figure 4As shown, along the first direction, the size of the array substrate 11 is larger than that of the counter substrate 12. The array substrate 11 protrudes from the counter substrate 12 to form a protruding portion 111. The orthographic projection of the protruding portion 111 is at least partially located within the first surface 311 of the glass member 31. In a specific embodiment, the orthographic projection of the protruding portion 111 may be completely located within the first surface 311. The welding area H is annular. Along the circumferential direction of the display panel 1, in a part of the welding area H corresponding to the protruding portion 111, the array substrate 11 and the glass member 31 are fixedly connected by a laser welding process. In the remaining welding area H, the counter substrate 12 and the glass member 31 are fixedly connected by a laser welding process. Specifically, the display panel 1 is rectangular. Only at the side position where the protruding portion 111 of the array substrate 11 is located, the glass member 31 is laser welded to the array substrate 11. At the positions corresponding to the other three sides of the display panel 1, the glass member 31 is laser welded to the counter substrate 12.

[0086] Specifically, in some embodiments, the protruding portion 111 includes a bonding area B. The orthographic projection of the bonding area B is located within the first surface 311 of the glass member 31. And in the first direction, the bonding area B is located on the side of the welding area H away from the body portion 321. That is, in this embodiment, the bonding area B is located inside the welding area H. The array substrate 11 includes a driving circuit layer. The array substrate 11 has a second surface 112 facing the counter substrate 12. That is, different from the display module 100 of the first embodiment, in this embodiment, the second surface 112 is arranged facing the first surface 311 of the glass member 31. A first contact pad 113 is arranged at the position of the second surface 112 corresponding to the bonding area B. The first contact pad 113 is electrically connected to the driving circuit layer.

[0087] Furthermore, different from the display module 100 of the first embodiment, in this embodiment, a second contact pad 33 is arranged at the position of the first surface 311 of the glass member 31 corresponding to the bonding area B. The display module 100 not only includes a flexible circuit board 7, but also includes a conductive adhesive 34. One end of the flexible circuit board 7 is electrically connected to the second contact pad 33. The conductive adhesive 34 is arranged between the array substrate 11 and the glass member 31 and electrically connects the first contact pad 113 and the second contact pad 33. That is, in this embodiment, the second contact pad 33 is arranged on the first surface 311 of the glass member 31 facing the display panel 1. The driving circuit layer of the array substrate 11 is electrically connected to the flexible circuit board 7 through the first contact pad 113, the conductive adhesive 34, and the second contact pad 33 in sequence. The flexible circuit board 7 is not directly electrically connected to the first contact pad 113 of the array substrate 11. In a specific embodiment, the conductive adhesive 34 is an ACF (Anisotropic Conductive Film) conductive adhesive 34.

[0088] It can be understood that in this embodiment, the array substrate 11 is located on the side of the opposing substrate 12 away from the backlight module 2. By arranging the bonding area B on the side of the welding area H away from the body portion 321, the bonding area B is located inside the welding area H, and a second contact pad 33 is arranged on the first surface 311 of the glass member 31 corresponding to the bonding area B. Before laser welding the display panel 1 and the glass member 31 of the composite middle frame 3, one end of the flexible circuit board 7 can be electrically connected to the second contact pad 33 arranged on the first surface 311 of the glass member 31 corresponding to the bonding area B in advance, realizing the bonding of the flexible circuit board 7 and the second contact pad 33 in advance, and then performing laser welding. The electrical connection between the first contact pad 113 and the second contact pad 33 is realized by the contact arrangement of the conductive adhesive 34 with the first contact pad 113 of the array substrate 11 and the second contact pad 33 of the glass member 31, realizing the electrical connection between the flexible circuit board 7 and the array substrate 11. In this embodiment, the pre-bonding of the flexible circuit board 7 and the second contact pad 33 of the glass member 31 and the setting position of the flexible circuit board 7 do not affect the laser welding effect between the array substrate 11 in the welding area H and the glass member 31 of the composite middle frame 3, and it can be avoided that because the second contact pad 33 is not arranged on the first surface 311 of the glass member 31, the flexible circuit board 7 cannot be pre-bonded with the array substrate 11, resulting in the problem that after laser welding the display panel 1 and the glass member 31 of the composite middle frame 3 in the welding area H, specifically, after laser welding the glass member 31 and the array substrate 11 at the position corresponding to the protruding portion 111, the bonding between the flexible circuit board 7 and the array substrate 11 cannot be realized. Through the above settings, the waterproof and dustproof performance and display performance of the display module 100 can be further improved.

[0089] Specifically, as Figure 5 shown, in some embodiments, one end of the supporting portion 322 of the plastic member 32 of the composite middle frame 3 away from the body portion 321 has a notch 35, and the notch 35 is arranged corresponding to the position of the second contact pad 33 on the first surface 311 of the glass member 31. One end of the flexible circuit board 7 is electrically connected to the second contact pad 33, and the other end extends into the rear case 5 through the notch 35 of the supporting portion 322 and the gap between the back plate 21 and the optical component 22 in sequence, and is electrically connected to the connector 61 of the logic component 6 arranged in the rear case 5 to realize the electrical connection between the logic component 6 and the array substrate 11, facilitating the driving and controlling of the display panel 1 to realize the display function. That is, in this embodiment, the flexible circuit board 7 extends from inside the back plate 21 of the backlight module 2 into the space between the rear case 5 and the back plate 21, realizing the electrical connection with the logic component 6, which is more conducive to improving the waterproof and dustproof performance of the display module 100.

[0090] In this embodiment, when assembling the display module 100, one end of the flexible circuit board 7 needs to be bonded to the second contact pad 33 on the first surface 311 of the glass member 31 first, and then the display panel 1 is assembled in alignment with the composite middle frame 3 bonded with the flexible circuit board 7, so that the second surface 112 of the array substrate 11 corresponds to the first contact pad 113 arranged at the bonding area B position on the first surface 311 of the glass member 31 and the second contact pad 33 arranged at the bonding area B position on the first surface 311 of the glass member 31 achieve contact electrical connection through the conductive adhesive 34 arranged between the first contact pad 113 and the second contact pad 33. At other positions except the position of the protruding portion 111, the surface of the counter substrate 12 away from the array substrate 11 is attached to the first surface 311 of the glass member 31; the display panel 1 and the glass member 31 of the composite middle frame 3 are fixed by laser welding process. Specifically, in the partial welding area H corresponding to the protruding portion 111, the array substrate 11 and the glass member 31 are fixedly connected by laser welding process, and in the other welding areas H except the position of the protruding portion 111, the counter substrate 12 and the glass member 31 are fixedly connected by laser welding process. After laser welding the display panel 1 and the glass member 31 of the composite middle frame 3, the welding part can also be inspected to ensure the welding quality and ensure that there are no defects such as air holes, cracks, discontinuity, etc. at the welding position. After welding is completed, the first sealing ring 4 is assembled on one side of the step portion 213 of the backlight module 2, and the optical components 22 and the like inside the backplane 21 of the backlight module 2 are assembled. The other end of the flexible circuit board 7 extends from the inside of the accommodation space 23 of the backplane 21 to the outside of the backplane 21, and then the assembled backlight module 2 is assembled on the plastic part 32 of the already welded display panel 1 and the composite middle frame 3, and the plastic part 32 of the composite middle frame 3 and the backplane 21 are locked by locking parts such as screws to ensure that the first sealing ring 4 is extruded; the logic component 6 is assembled in the rear shell 5, and the other end of the flexible circuit board 7 is electrically connected to the connector 61 of the logic component 6 in the rear shell 5. The second sealing ring 8 is assembled and the rear shell 5 and the backplane 21 are locked and fixed by locking parts such as screws to complete the assembly of the display module 100.

[0091] In this embodiment, the rest of the structure and setting mode of the display module 100 are the same as those of the display module 100 provided in the first embodiment, and the same or similar technical effects can be achieved, which will not be elaborated here.

[0092] In some embodiments, after the display module 100 is assembled, the assembled display module 100 can be subjected to waterproof and dustproof tests and light aging tests. Specifically, the test environment for the waterproof and dustproof test can be a simulated heavy rain environment, and the test duration is 2h. The test conditions for the light aging test are: first, ultraviolet light irradiation for 120h, and then placed under the conditions of 85 °C and 85% RH (relative humidity) for 500h.

[0093] The inventors of the present application used the structure of the display module 100 in this embodiment to conduct the above waterproof and dustproof tests. The test results showed that no water or dust entered the display module 100, proving that the display module 100 has good waterproof and dustproof performance. The structure of the display module 100 in this embodiment can still achieve good waterproof and dustproof performance in special environments such as outdoor activities, diving, and mines, and can meet the requirements of special usage scenarios.

[0094] Furthermore, the inventors of the present application used the structure of the display module 100 in this embodiment to conduct the above light aging test. The test results showed that the performance of the display module 100 did not significantly decline, proving that the display module 100 has good anti-aging performance.

[0095] The structure of the display module 100 provided in this embodiment can effectively improve the waterproof and dustproof performance of the display module 100, extend its service life, reduce the usage cost, and has great market potential.

[0096] Refer to Figure 9 , Figure 9 which is a schematic flowchart of the manufacturing method of the display module provided in the third embodiment of the present application.

[0097] See Figure 9 , the third embodiment of the present application provides a manufacturing method of a display module 100 for manufacturing and forming the display module 100. The manufacturing method of the display module 100 includes:

[0098] S1: Provide a display panel 1, a backlight module 2, and a composite middle frame 3.

[0099] Specifically, provide a display panel 1, a backlight module 2, and a composite middle frame 3. Among them, the display panel 1 includes an array substrate 11 and a counter substrate 12 arranged opposite to each other and a liquid crystal layer disposed between the array substrate 11 and the counter substrate 12. The array substrate 11 and the counter substrate 12 are connected by frame glue. The backlight module 2 includes a back plate 21 and an optical component 22. The back plate 21 encloses to form a receiving space 23, and the optical component 22 is disposed in the receiving space 23. The composite middle frame 3 includes a glass part 31 and a plastic part 32 connected to each other, and the composite middle frame 3 is prepared by a two-shot molding process.

[0100] S2: Place the display panel 1 on one side of the composite middle frame 3, and use a laser to laser-weld the display panel 1 and the glass part 31 in the welding area H.

[0101] Specifically, the display panel 1 is placed on one side of the composite middle frame 3. In one embodiment, the array substrate 11 of the display panel 1 is located on the side of the counter substrate 12 close to the composite middle frame 3. The welding area H is annular and is arranged along the edge of the array substrate 11. A laser is used to perform laser welding on the display panel 1 and the glass part 31 in the welding area H, so that the array substrate 11 of the display panel 1 is fixedly connected to the glass part 31 of the composite middle frame 3.

[0102] Specifically, refer to Figures 1 to 3 , in some embodiments, the plastic part 32 of the composite middle frame 3 includes a main body part 321 and a support part 322. Both the main body part 321 and the support part 322 are annular. Specifically, both the main body part 321 and the support part 322 are in the shape of a rectangular ring, and the main body part 321 is correspondingly arranged around the display panel 1. The main body part 321 extends along the thickness direction of the display module 100. The support part 322 is connected to the inner side surface of the main body part 321, and the support part 322 is located between the display panel 1 and the backlight module 2. The support part 322 is used to support the display panel 1. The glass part 31 of the composite middle frame 3 is located on the side of the support part 322 close to the display panel 1 and is partially embedded in the support part 322. The glass part 31 is annular. Specifically, as Figure 2 shown, the glass part 31 is in the shape of a rectangular ring and is arranged corresponding to the edge of the display panel 1. Among them, the glass part 31 has a first surface 311 facing away from the backlight module 2. The plastic part 32 wraps the glass part 31 and exposes the first surface 311. In some embodiments, the orthographic projection of the welding area H of the display module 100 is located within the first surface 311. That is, when welding the display panel 1 and the glass part 31 of the composite middle frame 3 in the welding area H, the position where the display panel 1 and the glass part 31 are melted and combined corresponds to be located within the first surface 311, rather than at the position corresponding to the inner side surface of the glass part 31. The surface of the array substrate 11 close to the glass part 31 (i.e., the surface facing away from the counter substrate 12) is attached to the first surface 311 of the glass part 31. When performing laser welding on the display panel 1 and the glass part 31 in the welding area H, a part of the glass at the attachment position of the array substrate 11 and the glass part 31 is melted and combined, so that the side of the array substrate 11 facing away from the counter substrate 12 is connected to the glass part 31, thereby fixedly connecting the composite middle frame 3 and the array substrate 11 of the display panel 1.

[0103] In another embodiment, the array substrate 11 of the display panel 1 is located on the side of the counter substrate 12 away from the composite middle frame 3. The welding area H is annular and is arranged along the edge of the display panel 1. When using a laser to perform laser welding on the display panel 1 and the glass part 31 in the welding area H, along the circumferential direction of the display panel 1, a part of the glass part 31 is welded and fixed to the counter substrate 12, and the other part is welded and fixed to the array substrate 11.

[0104] Specifically, as Figure 4As shown, along the first direction, the size of the array substrate 11 is larger than that of the counter substrate 12. The array substrate 11 protrudes from the counter substrate 12 to form a protruding portion 111. The orthographic projection of the protruding portion 111 is at least partially located within the first surface 311 of the glass member 31. The welding area H is annular. Along the circumferential direction of the display panel 1, in the partial welding area H corresponding to the protruding portion 111, the array substrate 11 and the glass member 31 are fixedly connected by a laser welding process. In the remaining welding area H, the counter substrate 12 and the glass member 31 are fixedly connected by a laser welding process.

[0105] In this embodiment, a second contact pad 33 is provided at a position on the first surface 311 of the glass member 31 corresponding to the bonding area B. A first contact pad 113 is provided at a position on the second surface 112 of the array substrate 11 corresponding to the bonding area B. Before laser welding the display panel 1 and the glass member 31 in step S2, it is necessary to first provide a flexible circuit board 7 and bond one end of the flexible circuit board 7 to the second contact pad 33 on the first surface 311 of the glass member 31 (as Figure 7 shown). When placing the display panel 1 on one side of the composite middle frame 3 in step S2, a conductive adhesive 34 is provided between the second contact pad 33 and the first contact pad 113, so that the first contact pad 113 provided at the position on the second surface 112 of the array substrate 11 corresponding to the bonding area B is in contact electrical connection with the second contact pad 33 provided at the position on the first surface 311 of the glass member 31 corresponding to the bonding area B through the conductive adhesive 34 provided between the first contact pad 113 and the second contact pad 33. At positions other than the position of the protruding portion 111, the surface of the counter substrate 12 away from the array substrate 11 is attached to the first surface 311 of the glass member 31, and then the display panel 1 and the glass member 31 of the composite middle frame 3 are laser welded and fixed by a laser welding process.

[0106] In some embodiments, when laser welding the display panel 1 and the glass member 31 in the welding area H, a laser with a wavelength of 1064 nm and an average power of 50 w is used. The welding speed during laser welding is 3 - 8 mm / S. Preferably, the welding speed during laser welding is 5 mm / S. Using the above parameters for laser welding, the welding effect is better, the display panel 1 and the glass member 31 are not easily broken, and it will not have an adverse impact on the display effect of the display module 100.

[0107] The above method can perform all-round sealing between the display panel 1 and the composite middle frame 3 in the circumferential direction of the display module 100, effectively preventing water vapor or dust from entering the display module 100 through the gap between the display panel 1 and the composite middle frame 3 and affecting the display effect and service life of the display module 100, and improving the waterproof and dustproof performance of the display module 100.

[0108] In some embodiments, after laser welding the display panel 1 and the glass part 31 of the composite middle frame 3, the welding part can be inspected to ensure the welding quality and guarantee that there are no defects such as air holes, cracks, discontinuities, etc. at the welding position.

[0109] S3: Integrally assemble the welded display panel 1 and the composite middle frame 3 onto the backlight module 2, and connect the plastic part 32 to the back plate 21.

[0110] Specifically, integrally assemble the display panel 1 and the composite middle frame 3 that have been welded in step S2 onto the backlight module 2. Specifically, in some embodiments, the back plate 21 includes a bottom plate 211 and an annular side plate 212. The annular side plate 212 is connected to one side of the bottom plate 211 close to the display panel 1 and encloses a receiving space 23 with the bottom plate 211. The main body part 321 is disposed around the outside of the annular side plate 212, and the supporting part 322 is located between the annular side plate 212 and the display panel 1. Specifically, the main body part 321 of the plastic part 32 of the composite middle frame 3 is sleeved on the outer side surface of the annular side plate 212 of the back plate 21, and the outer side surface of the annular side plate 212 is in contact and fit with the inner side surface of the main body part 321. The surface of the supporting part 322 away from the display panel 1 abuts against and is in contact and fit with the end surface of the annular side plate 212 away from the bottom plate 211. It can be understood that by disposing the plastic part 32 of the composite middle frame 3 outside, when there is a problem with the display module 100 that needs to be repaired, it is not necessary to separately disassemble the display panel 1. By removing the connection between the plastic part 32 of the composite middle frame 3 and the back plate 21, the above setting is more convenient for repairing the display module 100.

[0111] Specifically, as Figure 1 shown, in some embodiments, the annular side plate 212 of the back plate 21 includes a step part 213 and a vertically extending part 214. The step part 213 connects the bottom plate 211 and the vertically extending part 214. The main body part 321 of the plastic part 32 of the composite middle frame 3 is located at the top of the step part 213 and is disposed around the vertically extending part 214, and the inner side surface of the main body part 321 is in contact and fit with the outer side surface of the vertically extending part 214. Among them, the main body part 321 of the plastic part 32 of the composite middle frame 3 and the annular side plate 212 of the back plate 21 are locked and connected through structural parts such as screws to complete the fixed connection between the back plate 21 and the composite middle frame 3.

[0112] Further, in some embodiments, the display module 100 may further include a first sealing ring 4. Before assembling the backlight module 2 with the assembly of the display panel 1 and the composite middle frame 3, the first sealing ring 4 may be disposed on one side of the step portion 213. After the backlight module 2 is assembled with the composite middle frame 3, the first sealing ring 4 is disposed between the step portion 213 and the body portion 321 and is disposed around the vertically extending portion 214. The surface of the body portion 321 close to the step portion 213 abuts against the first sealing ring 4, and the first sealing ring 4 is squeezed by the step portion 213 and the body portion 321. To seal between the plastic part 32 of the composite middle frame 3 and the back plate 21 of the backlight module 2, which is beneficial to prevent moisture or dust from entering the inside of the display module 100 through the gap between the composite middle frame 3 and the back plate 21, thereby affecting the display performance, and further improving the waterproof and dustproof effect of the display module 100. Among them, the first sealing ring 4 may be made of materials such as silica gel and rubber.

[0113] In some embodiments, the display module 100 further includes a rear case 5 and a logic component 6. The logic component 6 is disposed in the rear case 5. In one embodiment, after the integrated assembly of the display panel 1 and the composite middle frame 3 onto the backlight module 2 is completed, the flexible circuit board 7 may be bonded at the bonding area B of the array substrate 11, so that one end of the flexible circuit board 7 is electrically connected to the first contact pad 113 in the bonding area B of the array substrate 11, and the other end is electrically connected to the connector 61 of the logic component 6 disposed in the rear case 5, thereby realizing the electrical connection between the driving circuit layer and the logic component 6, and facilitating the driving and controlling of the display panel 1 to achieve the display function.

[0114] Specifically, in one embodiment, as Figure 1 shown, the array substrate 11 of the display panel 1 is located on the side of the counter substrate 12 close to the composite middle frame 3. The surface of the array substrate 11 facing the counter substrate 12 is the second surface 112 (i.e., the top surface of the array substrate 11). The array substrate 11 includes a driving circuit layer, and the driving circuit layer is disposed on the second surface 112 of the array substrate 11. One end of the flexible circuit board 7 may be electrically connected to the driving circuit layer disposed on the second surface 112 of the array substrate 11, and the other end is bent to the side of the back plate 21 of the backlight module 2 and is electrically connected to the connector 61 of the logic component 6 disposed in the rear case 5.

[0115] In another embodiment, as Figure 4 and Figure 5As shown in the figure, the array substrate 11 of the display panel 1 of the display module 100 is located on the side of the opposing substrate 12 facing away from the backlight module 2. The second surface 112 of the array substrate 11 faces the first surface 311 of the glass member 31. A second contact pad 33 is provided on the first surface 311 of the glass member 31 corresponding to the position of the bonding area B. Before laser welding the display panel 1 and the glass member 31 in step S2, one end of the flexible circuit board 7 can be bonded to the second contact pad 33 on the first surface 311 of the glass member 31. When the display panel 1 and the composite middle frame 3 bonded with the flexible circuit board 7 are assembled in alignment, electrical contact connection is achieved between the first contact pad 113 of the array substrate 11 and the second contact pad 33 of the glass member 31 through the conductive adhesive 34. When the welded display panel 1 and the composite middle frame 3 are integrally assembled to the backlight module 2 in step S3, the other end of the flexible circuit board 7 extends to the side of the backplate 21 away from the display panel 1 through the notch 35 of the support portion 322 and the gap between the backplate 21 and the optical component 22 in sequence. After the display panel 1 and the composite middle frame 3 are integrally assembled to the backlight module 2, the other end of the flexible circuit board 7 is electrically connected to the connector 61 of the logic component 6 provided in the rear case 5.

[0116] After the flexible circuit board 7 is electrically connected to the connector 61 of the logic component 6, the rear case 5 is assembled to the side of the backplate 21 away from the display panel 1 and fixedly connected to the backplate 21. Specifically, when the rear case 5 and the backplate 21 are assembled, a second sealing ring 8 can be assembled between the contact surfaces of the rear case 5 and the backplate 21 to further improve the waterproof and dustproof capabilities. The rear case 5 and the backplate 21 can be fixedly locked through locking members such as screws to complete the assembly of the display module 100.

[0117] S4: Perform waterproof and dustproof tests and light aging tests.

[0118] Specifically, waterproof and dustproof tests and light aging tests are performed on the assembled display module 100. Specifically, the test environment for the waterproof and dustproof test can be a simulated heavy rain environment, and the test duration is 2h. The test conditions for the light aging test are: first, irradiate with ultraviolet light for 120h, and then place it under the conditions of 85°C and 85% RH (relative humidity) for 500h.

[0119] The structure of the display module 100 can be as Figure 1 or Figure 4For any of the display modules 100, the above waterproof and dustproof test is carried out using the structure of the above display module 100. The test results show that no water or dust enters the display module 100, proving that the above two display modules 100 both have good waterproof and dustproof performance. The structure of the above display module 100 can still achieve good waterproof and dustproof performance in special environments such as outdoor activities, diving, and mines, and can meet the requirements of special usage scenarios.

[0120] The above light aging test is carried out using the structure of the above display module 100. The test results show that the performance of the display module 100 does not decrease significantly, proving that the above two display modules 100 both have good anti-aging performance.

[0121] The structure of the display module 100 prepared by the above method can effectively improve the waterproof and dustproof performance of the display module 100, extend its service life, reduce the use cost, and has great market potential.

[0122] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A display module, characterized in that, Comprising: A display panel, including an array substrate and a counter substrate arranged opposite to each other; A backlight module, including a back plate and an optical component; The back plate encloses to form a receiving space, and the optical component is disposed in the receiving space; A composite middle frame, disposed between the backlight module and the display panel and connecting the backlight module and the display panel; the composite middle frame includes a glass member and a plastic member connected to each other, and the composite middle frame is prepared by a two-shot molding process; Wherein, the display module has a welding area, and in the welding area, the display panel and the glass member are fixedly connected by a laser welding process; the plastic member is connected to the back plate.

2. The display module according to claim 1, wherein The plastic member includes a body portion and a support portion, and both the body portion and the support portion are annular; the body portion extends along the thickness direction of the display module, and the support portion is connected to the inner side surface of the body portion; The support portion is located between the display panel and the backlight module; The glass member is located on the side of the support portion close to the display panel and is partially embedded in the support portion; the glass member is annular, the glass member has a first surface facing away from the backlight module, and the plastic member wraps the glass member and exposes the first surface; The orthographic projection of the welding area is located within the first surface.

3. The display module according to claim 2, wherein The welding area is annular; The array substrate is located on the side of the counter substrate close to the backlight module, and in the welding area, the array substrate and the glass member are fixedly connected by a laser welding process.

4. The display module according to claim 2, wherein The welding area is annular; The array substrate is located on the side of the counter substrate away from the backlight module. Along a first direction, the size of the array substrate is larger than that of the counter substrate, and the array substrate protrudes from the counter substrate to form a protruding portion, and the orthographic projection of the protruding portion is at least partially located within the first surface; Along the circumferential direction of the display panel, in a part of the welding area corresponding to the protruding portion, the array substrate and the glass member are fixedly connected by a laser welding process, and in the remaining welding area, the counter substrate and the glass member are fixedly connected by a laser welding process.

5. The display module according to claim 4, wherein, The protruding portion includes a bonding area, the orthographic projection of the bonding area is located within the first surface, and in the first direction, the bonding area is located on the side of the welding area away from the body portion; The array substrate includes a driving circuit layer, the array substrate has a second surface facing the counter substrate, and a first contact pad is disposed at a position corresponding to the bonding area on the second surface, and the first contact pad is electrically connected to the driving circuit layer; A second contact pad is disposed at a position corresponding to the bonding area on the first surface; the display module further includes a flexible circuit board and a conductive adhesive, and one end of the flexible circuit board is electrically connected to the second contact pad; the conductive adhesive is disposed between the array substrate and the glass member and electrically connects the first contact pad and the second contact pad.

6. The display module according to claim 5, wherein One end of the support portion away from the body portion has a notch, and the notch is disposed at a position corresponding to the second contact pad; The display module further includes a rear case and a logic component. The rear case is disposed on a side of the backplane away from the display panel, and the logic component is disposed inside the rear case; the logic component includes a connector; The other end of the flexible circuit board sequentially extends into the rear case through the notch and the gap between the backplane and the optical component, and is electrically connected to the connector; A driving chip is disposed on the flexible circuit board.

7. The display module according to claim 2, wherein The backplane includes a bottom plate and an annular side plate. The annular side plate is connected to a side of the bottom plate close to the display panel, and encloses the accommodation space with the bottom plate; The body portion is disposed around the outside of the annular side plate.

8. The display module according to claim 7, wherein The annular side plate includes a stepped portion and a vertically extending portion. The stepped portion connects the bottom plate and the vertically extending portion; the body portion is located at the top of the stepped portion and disposed around the vertically extending portion, and an inner side surface of the body portion is in fit with an outer side surface of the vertically extending portion; The display module further includes a first sealing ring. The first sealing ring is disposed between the stepped portion and the body portion and around the vertically extending portion.

9. The display module according to claim 1, wherein When laser welding the display panel and the glass member in the welding area, a laser with a wavelength of 1064 nm and an average power of 50 w is used; the welding speed is 3 - 8 mm / S; and / or, The fusion depth of the display panel and the glass member is 0.2 - 0.5 mm; and / or, The display module further includes a first polarizer and a second polarizer. The first polarizer is disposed on a side of the counter substrate away from the array substrate, and the second polarizer is disposed on a side of the array substrate away from the counter substrate.

10. A method for preparing a display module, characterized in that, Including: Providing a display panel, a backlight module, and a composite middle frame; wherein, the display panel includes an array substrate and a counter substrate which are oppositely disposed; the backlight module includes a backplane and an optical component; the backplane encloses an accommodation space, and the optical component is disposed in the accommodation space; the composite middle frame includes a glass member and a plastic member which are connected to each other, and the composite middle frame is prepared by a two - step forming process; Placing the display panel on one side of the composite middle frame, and using a laser to perform laser welding on the display panel and the glass member in the welding area; Integrally assembling the welded display panel and the composite middle frame onto the backlight module, and connecting the plastic member to the backplane; Performing a waterproof and dust - proof test and a light aging test; wherein, the test environment for the waterproof and dust - proof test is a simulated heavy rain environment, and the test duration is 2 h; the test conditions for the light aging test are: first, irradiating with ultraviolet light for 120 h, and then placing it under the conditions of 85 °C and 85% RH for 500 h.

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