Display module and preparation method thereof

Abstract

The invention discloses a display module and a preparation method thereof. The display module comprises a display panel which comprises an array substrate and an opposite substrate which are oppositely arranged; the backlight module comprises a back plate and an optical assembly, the back plate forms a containing space in a surrounding mode, and the optical assembly is arranged in the containing space; the composite middle frame is arranged between the backlight module and the display panel and connected with the backlight module and the display panel, the composite middle frame comprises a glass part and a plastic part which are connected with each other, and the composite middle frame is prepared by adopting a secondary forming process; wherein the display module is provided with a welding area, in the welding area, the display panel and the glass part are fixedly connected through a laser welding process, and the plastic part is connected with the back plate. By means of the arrangement, the problem that in the prior art, a display module is insufficient in waterproof and dustproof capacity is solved, the display module can normally work in water or in a high-dust environment, the requirement in a special environment is met, and cost reduction, service life prolonging and display effect and user experience improving are facilitated.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a method for preparing 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 display modules for displaying images and information. However, during use, display modules are often affected by water and dust, which affects their display effect and service life.

[0003] In the prior art, the display module is mainly sealed with materials such as rubber rings to achieve the purpose of waterproof and dustproof. However, the rubber ring is easy to age, has a short lifespan, and needs to be replaced regularly. The waterproof and dustproof capabilities of the display module are limited, the cost is high, and it cannot meet the needs of some special environments. Summary of the invention

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

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a display module, comprising:

[0006] The display panel comprises an array substrate and an opposing substrate which are arranged opposite to each other;

[0007] The backlight module comprises a back plate and an optical component; the back plate is surrounded to form a receiving space, and the optical component is arranged in the receiving space;

[0008] A composite middle frame is disposed between the backlight module and the display panel and connects the backlight module and the display panel; the composite middle frame comprises a glass part and a plastic part connected to each other, and the composite middle frame is prepared by a secondary molding process;

[0009] Wherein, the display module has a welding area, in which the display panel and the glass component are fixedly connected through a laser welding process; and the plastic component is connected to the back panel.

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

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

[0012] An orthographic projection of the weld zone is located within the first surface.

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

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

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

[0016] The array substrate is located at a side of the opposite substrate away from the backlight module. Along the first direction, the size of the array substrate is larger than that of the opposite substrate. The array substrate protrudes from the opposite 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 circumference of the display panel, in the welding area corresponding to the protrusion, the array substrate and the glass piece are fixedly connected by a laser welding process, and in the remaining welding areas, the counter substrate and the glass piece are fixedly connected by a laser welding process.

[0018] In some embodiments, the protrusion includes a bonding area, an 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 main body;

[0019] The array substrate comprises a driving circuit layer, the array substrate has a second surface facing the counter substrate, a first contact pad is arranged at a position of the second surface corresponding to the bonding area, and the first contact pad is electrically connected to the driving circuit layer;

[0020] A second contact pad is arranged at a position of the first surface corresponding to the bonding area; the display module also 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 arranged between the array substrate and the glass member, and electrically connects the first contact pad and the second contact pad.

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

[0022] The display module further comprises a rear shell and a logic component, wherein the rear shell is arranged on a side of the back plate away from the display panel, and the logic component is arranged in the rear shell; the logic component comprises a connector;

[0023] The other end of the flexible circuit board extends into the rear shell via the notch and the gap between the back plate and the optical component in sequence, and is electrically connected to the connector;

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

[0025] In some embodiments, the back plate includes a bottom plate and an annular side plate, wherein the annular side plate is connected to a side of the bottom plate close to the display panel and is surrounded by the bottom plate to form the accommodation space;

[0026] The main body is disposed around the outer side of the annular side plate.

[0027] In some embodiments, the annular side plate includes a step portion and a vertical extension portion, the step portion connects the bottom plate and the vertical extension portion; the main body portion is located on the top of the step portion and is arranged around the vertical extension portion, and the inner side surface of the main body portion is arranged to fit the outer side surface of the vertical extension portion;

[0028] The display module further includes a first sealing ring, which is disposed between the step portion and the main body portion and surrounds the vertical extension portion.

[0029] In some embodiments, when the display panel and the glass member are laser welded 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 fusion depth between the display panel and the glass piece 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] In order to solve the above technical problems, another technical solution adopted by the present application is: to provide a method for preparing a display module, comprising:

[0033] A display panel, a backlight module and a composite middle frame are provided; wherein the display panel comprises an array substrate and an opposing substrate arranged oppositely; the backlight module comprises a back plate and an optical component; the back plate is surrounded to form a receiving space, and the optical component is arranged in the receiving space; the composite middle frame comprises glass parts and plastic parts connected to each other, and the composite middle frame is prepared by a secondary molding process;

[0034] 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 a welding area;

[0035] Assemble the welded display panel and the composite middle frame integrally onto the backlight module, and connect the plastic part to the back plate;

[0036] Waterproof and dustproof test and light aging test are carried out; wherein, the test environment of the waterproof and dustproof test is a simulated rainstorm environment, and the test duration is 2 hours; the test conditions of the light aging test are: first ultraviolet light irradiation for 120 hours, and then placed at 85°C, 85% RH for 500 hours.

[0037] The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses a display module and a method for preparing the same. The display module includes: a display panel, including an array substrate and an opposing substrate arranged relatively to each other; a backlight module, including a back plate and an optical component, the back plate is arranged to form a receiving space, and the optical component is arranged in the receiving space; a composite middle frame, arranged between the backlight module and the display panel and connecting the backlight module and the display panel, the composite middle frame includes glass parts and plastic parts connected to each other, and the composite middle frame is prepared by a secondary molding process; wherein the display module has a welding area, in which the display panel and the glass parts are fixedly connected by a laser welding process, and the plastic parts are connected to the back plate. By setting the composite middle frame to include glass parts and plastic parts, and welding the display panel and the glass parts of the composite middle frame to fix them through a laser welding process, all-round sealing of the display module can be achieved, which greatly improves the waterproof and dustproof performance of the display module, enabling it to work normally in water or in a high-dust environment, meeting the needs of special environments; and the laser welding method has better anti-aging ability, ensures the durability of the sealing effect, avoids the problem of reduced sealing effect due to aging of materials such as rubber rings, extends the service life of the display module, improves the display effect, and improves the user experience; at the same time, there is no need to set a rubber ring or other sealing part for sealing between the display panel and the glass parts of the composite middle frame, and there is no need to replace the rubber ring regularly, which reduces costs and effectively solves the problem of insufficient waterproof and dustproof ability of the display module in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

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

[0040] Figure 2 yes Figure 1 A schematic diagram of a top view structure of a composite middle frame of a display module is provided;

[0041] Figure 3 yes Figure 2 The AA cross-section diagram of the composite middle frame is provided;

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

[0043] Figure 5 yes Figure 4 A schematic diagram of a top view structure of a composite middle frame of a display module is provided;

[0044] Figure 6 yes Figure 5 A CC cross-sectional diagram of the composite middle frame is provided;

[0045] Figure 7 yes Figure 4 A schematic diagram of the bonding structure between the composite middle frame and the flexible circuit board of the display module provided;

[0046] Figure 8 yes Figure 4 A partial enlarged schematic diagram of the middle area D;

[0047] Fig. 9 It is a schematic flow chart of a method for preparing a display module provided in the third embodiment of the present application.

[0048] Figure Number:

[0049] Display module 100; display panel 1; array substrate 11; protrusion 111; second surface 112; first contact pad 113; opposite substrate 12; backlight module 2; back plate 21; bottom plate 211; annular side plate 212; step portion 213; vertical extension portion 214; optical component 22; accommodating space 23; composite middle frame 3; glass member 31; first surface 311; plastic member 32; main body 321; support portion 322; second contact pad 33; conductive adhesive 34; notch 35; first sealing ring 4; rear shell 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 DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

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

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

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

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

[0055] See also Figures 1 to 3 The display panel 1 includes an array substrate 11 and an opposing substrate 12 that are arranged opposite to each other, and a liquid crystal layer (not shown) arranged between the array substrate 11 and the opposing substrate 12. The array substrate 11 and the opposing substrate 12 are connected by a frame glue (not shown). The backlight module 2 includes a back plate 21 and an optical component 22. The back plate 21 is surrounded to form a receiving space 23, and the optical component 22 is arranged in the receiving space 23. The composite middle frame 3 is arranged 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 that are connected to each other. The composite middle frame 3 is prepared by a secondary 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 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 by the composite middle frame 3.

[0056] It can be understood that in the present application, by setting the composite middle frame 3 to include a glass member 31 and a plastic member 32, the composite middle frame 3 is prepared by a secondary molding process, and the display panel 1 and the glass member 31 of the composite middle frame 3 are welded and fixed by a laser welding process, and the display panel 1 is laser welded to the secondary molded composite middle frame 3, it is possible to achieve all-round sealing of the display module 100, greatly improving the waterproof and dustproof performance of the display module 100, so that it can work normally in water or in a high dust environment, meeting the needs of special environments, and in the process of use, it is possible to effectively prevent the influence of water and dust on the display module 100, thereby improving the display effect and the user's experience; Compared with traditional rubber ring sealing methods, laser welding 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, which is not easy to age, ensuring the durability of the sealing effect and avoiding the problem of reduced sealing effect due to aging of materials such as rubber rings. Moreover, since 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 a rubber ring or other sealing member for sealing between the display panel 1 and the glass part 31 of the composite middle frame 3, and there is no need to replace the rubber ring regularly, which reduces the production cost and effectively solves the problem of insufficient waterproof and dustproof ability of the display module 100 in the prior art.

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

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

[0059] The composite middle frame 3 is prepared by a secondary molding process. Specifically, a glass piece 31 can be prepared first, and then the glass piece 31 is placed in a mold for injection molding to form a plastic piece 32 having a main body portion 321 and a support portion 322 that wraps the glass piece 31 and exposes the first surface 311 of the glass piece 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 the display panel 1 and the glass member 31 of the composite middle frame 3 are welded at the welding area H, the position where the display panel 1 and the glass member 31 are melted and combined corresponds to the first surface 311, not at the position corresponding to the inner side surface of the glass member 31. In some embodiments, the welding area H is annular, and the welding area H is arranged corresponding to the edge position of the display panel 1.

[0061] In this embodiment, the array substrate 11 is located on the side of the opposing 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 opposing substrate 12 is located on the light emitting side of the display panel 1. In the thickness direction of the display module 100, the opposing substrate 12 is located on the top of the array substrate 11.

[0062] In the welding area H, the array substrate 11 is fixedly connected to the glass member 31 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 the display panel 1 and the glass member 31 are laser welded in the welding area H, part of the glass at the bonding position of the array substrate 11 and the glass member 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 member 31, thereby fixing the composite middle frame 3 and the array substrate 11 of the display panel 1.

[0063] Since the welding area H is annular, the display panel 1 and the composite middle frame 3 can be fully sealed in the circumferential direction of the display module 100, effectively preventing water vapor or dust from entering the display module 100 from the gap between the display panel 1 and the composite middle frame 3 to affect the display effect and service life of the display module 100, which is conducive to improving the waterproof and dustproof performance of the display module 100. There is no need to use sealing materials such as rubber rings to seal between the composite middle frame 3 and the display panel 1, and there is no need to replace the rubber ring regularly, and there is no problem of reduced sealing effect due to 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. The above parameters are used for laser welding, and the welding effect is better, the display panel 1 and the glass member 31 are not easy to break, and the display effect of the display module 100 will not be adversely affected.

[0065] In some embodiments, the fusion depth between the display panel 1 and the glass member 31 is 0.2-0.5 mm, and the fusion 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 the fusion depth between the display panel 1 and the glass member 31 is set within the range of 0.2-0.5 mm, which can avoid the fusion depth being too large, which affects the structural strength and display performance of the array substrate 11, and at the same time, it can also avoid the fusion depth being too small, which leads to the inability to effectively weld the display panel 1 and the glass member 31, and the inability to achieve a stable connection, which causes 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 the size of the counter substrate 12, and the array substrate 11 protrudes from the counter substrate 12 to form a protruding portion 111, and the orthographic projection of the protruding portion 111 is at least partially 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 may be located within the first surface 311, or may be partially located outside the first surface 311. Component bonding is performed on a portion of the surface of the array substrate 11 close to the counter substrate 12 (i.e., the top surface of the array substrate 11) located within the bonding area B. Since the bonding position of the components is located on the surface of the array substrate 11 close to the counter substrate 12, and the welding position of the display panel 1 and the glass member 31 is located on the surface of the array substrate 11 away from the counter substrate 12 (i.e., the bottom surface of the array substrate 11), when the array substrate 11 and the glass member 31 are welded in the welding area H, the bonding of the components in the bonding area B of the array substrate 11 will not be affected. 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 at will. In other embodiments, the size of the array substrate 11 can also be equal to the size 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 main body 321 of the composite middle frame 3 is 0.3-2 mm, preferably, the thickness of the main body 321 of the composite middle frame 3 is 1.5 mm; the thickness of the glass piece 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 piece 31 is 0.7 mm, and the thickness of the support portion 322 of the composite middle frame 3 is 0.8 mm, so that the structure of the composite middle frame 3 is more stable and has higher structural strength.

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

[0069] Specifically, in some embodiments, the optical component 22 of the backlight module 2 is arranged in the accommodating space 23 formed by the back plate 21. The optical component 22 includes a light source (not shown) and an optical film (not shown). The optical film may include a diffuser (not shown), a light guide plate (not shown), a reflector (not shown) and other structures. The light source may be a light board or a light bar. Specifically, the light source may be an LED, a MINI-led or other light-emitting element. In some embodiments, the optical component 22 also includes a support member (not shown), which supports the optical film to prevent the optical film from being sunken and affecting the display effect. The backlight module 2 may be a side-entry backlight module 2 or a direct-down backlight module 2, and may be designed as needed.

[0070] like Figure 1 As shown, 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 a side of the bottom plate 211 close to the display panel 1, and is surrounded with the bottom plate 211 to form a receiving space 23, the body portion 321 is arranged around the outside of the annular side plate 212, and the support 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 back plate 21, the outer side surface of the annular side plate 212 is fitted with the inner side surface of the body portion 321, and the surface of the support portion 322 away from the display panel 1 is abutted and fitted with the end surface of the annular side plate 212 away from the bottom plate 211. It can be understood that the main body 321 of the composite middle frame 3 is arranged around the outer side of the annular side plate 212, that is, the back plate 21 of the backlight assembly is arranged on the inner side of the main body 321 of the plastic part 32 of the composite middle frame 3. By placing the plastic part 32 of the composite middle frame 3 outside, when there is a problem with the display module 100 and it needs to be repaired, there is no need to disassemble the display panel 1 separately. It can be achieved by removing the connection between the plastic part 32 of the composite middle frame 3 and the back plate 21. The above arrangement makes it easier to repair the display module 100.

[0071] Specifically, Figure 1 As shown, in some embodiments, the annular side plate 212 of the back plate 21 includes a step portion 213 and a vertical extension portion 214, and the step portion 213 connects the bottom plate 211 and the vertical extension portion 214. The main body 321 of the plastic part 32 of the composite middle frame 3 is located at the top of the step portion 213 and is arranged around the vertical extension portion 214, and the inner side surface of the main body 321 is arranged to fit the outer side surface of the vertical extension portion 214. Among them, the main body 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 by structural parts such as screws, thereby completing the fixed connection between the back plate 21 and the composite middle frame 3.

[0072] Further, in some embodiments, the display module 100 further includes a first sealing ring 4, which is disposed between the step portion 213 and the main body portion 321 and around the vertical extension portion 214, and the surface of the main 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 main body portion 321. It can be understood that by disposing the first sealing ring 4 around the vertical extension portion 214 between the step portion 213 and the main body portion 321, the plastic part 32 of the composite middle frame 3 and the back plate 21 of the backlight module 2 can be sealed, which is conducive to preventing water vapor or dust from entering the display module 100 from the gap between the composite middle frame 3 and the back plate 21 to affect 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 silicone and rubber.

[0073] In some embodiments, the display module 100 further includes a rear shell 5 and a logic component 6. The rear shell 5 is disposed on a side of the back plate 21 of the backlight module 2 away from the display panel 1 and is fixedly connected to the back plate 21. The logic component 6 is disposed in a space formed by the rear shell 5 and the back plate 21. The logic component 6 includes a connector 61. The logic component 6 is used to drive and control the display panel 1 to realize a display function. The rear shell 5 and the bottom plate 211 of the back plate 21 are locked and connected by structural members such as screws to complete the fixed connection between the back plate 21 and the rear shell 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 opposite 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), 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 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 shell 5, thereby realizing the electrical connection between the driving circuit layer and the logic component 6, so as to facilitate driving and controlling the display panel 1 to realize the display function. In some embodiments, a driving chip (not shown) may be disposed on the flexible circuit board 7.

[0075] Specifically, in some embodiments, a first contact pad 113 is provided at a position corresponding to the bonding area B on the second surface 112 of the array substrate 11, and 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 achieving electrical connection with the driving circuit layer.

[0076] Specifically, in some embodiments, the display module 100 further includes a second sealing ring 8, which is disposed between the rear shell 5 and the back plate 21, and the surface of the rear shell 5 close to the back plate 21 abuts against the second sealing ring 8, so that the second sealing ring 8 is squeezed by the rear shell 5 and the back plate 21. The second sealing ring 8 can seal between the rear shell 5 and the back plate 21, which is beneficial to prevent water vapor or dust from entering the rear shell 5 from the gap between the rear shell 5 and the back plate 21 to affect the performance of the logic component 6, and further improve the waterproof and dustproof effect of the display module 100. Among them, the second sealing ring 8 can be made of materials such as silicone and rubber.

[0077] In some embodiments, the display module 100 further includes a first polarizer 91 and a second polarizer 92, wherein the first polarizer 91 is disposed on a 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 a 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 analysis.

[0078] In this embodiment, when assembling the display module 100, the display panel 1 and the composite middle frame 3 can be first aligned and assembled, and the array substrate 11 of the display panel 1 and the glass member 31 of the composite middle frame 3 can be laser welded and fixed by a laser welding process. After the display panel 1 and the glass member 31 of the composite middle frame 3 are laser welded, the welding position can also be inspected to ensure the welding quality and to ensure that there are no defects such as pores, cracks, discontinuities, etc. at the welding position. After the welding is completed, the back plate 21 and the optical component 22 of the backlight module 2 are assembled, and the first sealing ring 4 is assembled to the side of the step portion 213 of the backlight module 2, and then the assembled backlight module 2 is assembled to the display panel 1 and the plastic member 32 of the composite middle frame 3 that have been welded, and the plastic member 32 of the composite middle frame 3 and the back plate 21 are locked by screws and other locking parts 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 of the flexible circuit board 7 to the connector 61 of the logic component 6 can be performed after the above-mentioned assembly steps are completed, and the assembly locking between the rear shell 5 and the back plate 21 can be performed 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 may be subjected to a waterproof and dustproof test and a light aging test.

[0080] Specifically, the test environment for the waterproof and dustproof test can be a simulated rainstorm environment, and the test duration is 2 hours. The inventor of the present application uses the structure of the display module 100 of this embodiment to perform the above-mentioned waterproof and dustproof test. The test results show that the display module 100 has no water or dust ingress, proving that the display module 100 has good waterproof and dustproof performance. The structure of the display module 100 of this embodiment can still achieve good waterproof and dustproof performance in special environments such as outdoor activities, diving, and mines, and can meet the needs 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 of the display module and the flexible circuit board is 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 the size of the counter substrate 12, and the array substrate 11 protrudes from the counter substrate 12 to form a protrusion 111, and the orthographic projection of the protrusion 111 is at least partially located in the first surface 311 of the glass member 31. In a specific embodiment, the orthographic projection of the protrusion 111 can be completely located in the first surface 311. The welding area H is annular, and along the circumference of the display panel 1, in the partial welding area H corresponding to the protrusion 111, the array substrate 11 and the glass member 31 are fixedly connected by a laser welding process, and in the remaining welding areas 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, and only at the side position corresponding to the protrusion 111 of the array substrate 11, the glass member 31 is laser welded to the array substrate 11, and at the other three side positions corresponding to the display panel 1, the glass member 31 is laser welded to the counter substrate 12.

[0086] Specifically, in some embodiments, the protrusion 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 main body 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, and the array substrate 11 has a second surface 112 facing the opposite substrate 12, that is, different from the display module 100 of the first embodiment, in this embodiment, the second surface 112 is arranged toward the first surface 311 of the glass member 31. The second surface 112 is provided with a first contact pad 113 at a position corresponding to the bonding area B, and the first contact pad 113 is electrically connected to the driving circuit layer.

[0087] Further, different from the display module 100 of the first embodiment, in this embodiment, the first surface 311 of the glass member 31 is provided with a second contact pad 33 at a position corresponding to the bonding area B, and the display module 100 includes not only the flexible circuit board 7 but also the conductive adhesive 34, and one end of the flexible circuit board 7 is electrically connected to the second contact pad 33. The conductive adhesive 34 is provided 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 first surface 311 of the glass member 31 facing the display panel 1 is provided with the second contact pad 33, and 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, and 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 the present embodiment, the array substrate 11 is located on the side of the opposing substrate 12 away from the backlight module 2. By setting the bonding area B on the side of the welding area H away from the main body 321, the bonding area B is located inside the welding area H, and the first surface 311 of the glass member 31 is provided with a second contact pad 33 corresponding to the position of the bonding area B. Before the display panel 1 and the glass member 31 of the composite middle frame 3 are laser welded, one end of the flexible circuit board 7 can be electrically connected in advance to the second contact pad 33 provided on the first surface 311 of the glass member 31 corresponding to the position of the bonding area B, so as to realize the bonding of the flexible circuit board 7 and the second contact pad 33 in advance, and then laser welding is performed, and the first contact pad 113 of the array substrate 11 and the second contact pad 33 of the glass member 31 are contacted by the conductive adhesive 34 to realize the electrical connection between the first contact pad 113 and the second contact pad 33, so as to realize the electrical connection between the flexible circuit board 7 and the array substrate 11. In this embodiment, the early 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 will not affect the laser welding effect of the array substrate 11 and the glass member 31 of the composite middle frame 3 in the welding area H, and can avoid the problem that the flexible circuit board 7 cannot be bonded with the array substrate 11 in advance due to the first surface 311 of the glass member 31 not being provided with the second contact pad 33, resulting in the problem that the flexible circuit board 7 cannot be bonded with the array substrate 11 after the display panel 1 and the glass member 31 of the composite middle frame 3 are laser welded in the welding area H, specifically, after the glass member 31 and the array substrate 11 are laser welded at the position corresponding to the protrusion 111. Through the above-mentioned settings, the waterproof and dustproof performance and display performance of the display module 100 can be further improved.

[0089] Specifically, Figure 5 As shown, in some embodiments, the end of the support portion 322 of the plastic part 32 of the composite middle frame 3 away from the main body 321 has a notch 35, and the notch 35 is arranged corresponding to the position of the second contact pad 33 of the first surface 311 of the glass part 31. One end of the flexible circuit board 7 is electrically connected to the second contact pad 33, and the other end is sequentially extended to the rear shell 5 through the notch 35 of the support portion 322 and the gap between the back plate 21 and the optical component 22, and is electrically connected to the connector 61 of the logic component 6 arranged in the rear shell 5, so as to realize the electrical connection between the logic component 6 and the array substrate 11, so as to facilitate 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 the inside of the back plate 21 of the backlight module 2 to the space between the rear shell 5 and the back plate 21, realizes the electrical connection with the logic component 6, and 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, it is necessary to first bond one end of the flexible circuit board 7 to the second contact pad 33 of the first surface 311 of the glass member 31, and then align and assemble the display panel 1 and the composite middle frame 3 to which the flexible circuit board 7 is bonded, so that the first contact pad 113 disposed at the bonding area B position on the second surface 112 of the array substrate 11 and the second contact pad 33 disposed at the bonding area B position on the first surface 311 of the glass member 31 are connected to each other through the conductive adhesive 34 disposed between the first contact pad 113 and the second contact pad 33. Contact connection, at the remaining positions except the protrusion 111, the surface of the substrate 12 away from the array substrate 11 is arranged to fit 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 using a laser welding process. Specifically, in the partial welding area H corresponding to the protrusion 111, the array substrate 11 and the glass member 31 are fixedly connected by a laser welding process, and in the remaining welding areas H except the protrusion 111, the substrate 12 and the glass member 31 are fixedly connected by a laser welding process. After laser welding the display panel 1 and the glass member 31 of the composite middle frame 3, the welding position can also be inspected to ensure the welding quality and to ensure that there are no defects such as pores, cracks, discontinuities, etc. at the welding position. After welding is completed, the first sealing ring 4 is assembled to one side of the step portion 213 of the backlight module 2, and the optical components 22 and the like inside the back plate 21 of the backlight module 2 are assembled, and the other end of the flexible circuit board 7 is extended from the inside of the accommodating space 23 of the back plate 21 to the outside of the back plate 21, and then the assembled backlight module 2 is assembled to the display panel 1 and the plastic part 32 of the composite middle frame 3 that have been welded, and the plastic part 32 of the composite middle frame 3 and the back plate 21 are locked with screws or other locking parts to ensure that the first sealing ring 4 is squeezed; 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, and the second sealing ring 8 is assembled and the rear shell 5 and the back plate 21 are locked and fixed with screws or other locking parts to complete the assembly of the display module 100.

[0091] In this embodiment, the rest of the structure and configuration of the display module 100 are the same as those of the display module 100 provided in the first embodiment, and can achieve the same or similar technical effects, which will not be described in detail herein.

[0092] In some embodiments, after the display module 100 is assembled, the assembled display module 100 may be subjected to a waterproof and dustproof test and a light aging test. Specifically, the test environment for the waterproof and dustproof test may be a simulated rainstorm environment, and the test duration is 2 hours. The test conditions for the light aging test are: first irradiate with ultraviolet light for 120 hours, and then place under 85°C and 85% RH (relative humidity) for 500 hours.

[0093] The inventor of the present application used the structure of the display module 100 of this embodiment to perform the above-mentioned waterproof and dustproof test. The test results show that the display module 100 has no water or dust ingress, proving that the display module 100 has good waterproof and dustproof performance. The structure of the display module 100 of this embodiment can still achieve good waterproof and dustproof performance in special environments such as outdoor activities, diving, and mines, and can meet the needs of special usage scenarios.

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

[0095] 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.

[0096] See also Fig. 9 , Fig. 9 It is a schematic flow chart of a method for preparing a display module provided in the third embodiment of the present application.

[0097] See also Fig. 9 The third embodiment of the present application provides a method for preparing a display module 100, which is used to prepare and form the display module 100. The method for preparing the display module 100 includes:

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

[0099] Specifically, a display panel 1, a backlight module 2 and a composite middle frame 3 are provided, wherein the display panel 1 includes an array substrate 11 and an opposing substrate 12 that are arranged opposite to each other, and a liquid crystal layer arranged between the array substrate 11 and the opposing substrate 12, and the array substrate 11 and the opposing substrate 12 are connected by a frame glue. The backlight module 2 includes a back plate 21 and an optical component 22, the back plate 21 is surrounded to form a receiving space 23, and the optical component 22 is arranged in the receiving space 23. The composite middle frame 3 includes a glass part 31 and a plastic part 32 that are connected to each other, and the composite middle frame 3 is prepared by a secondary molding process.

[0100] S2: placing the display panel 1 on one side of the composite middle frame 3, and performing laser welding on the display panel 1 and the glass member 31 at the welding area H using a laser.

[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 one side of the counter substrate 12 close to the composite middle frame 3, the welding area H is annular, and the welding area H 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 member 31 in the welding area H, so that the array substrate 11 of the display panel 1 is fixedly connected to the glass member 31 of the composite middle frame 3.

[0102] For details, see Figures 1 to 3 In some embodiments, the plastic component 32 of the composite middle frame 3 includes a main body portion 321 and a support portion 322. Both the main body portion 321 and the support portion 322 are annular. Specifically, both the main body portion 321 and the support portion 322 are rectangular ring-shaped, and the main body portion 321 is arranged correspondingly around the display panel 1. The main body portion 321 extends along the thickness direction of the display module 100, the support portion 322 is connected to the inner side of the main body portion 321, and the support portion 322 is located between the display panel 1 and the backlight module 2, and the support portion 322 is used to support the display panel 1. The glass component 31 of the composite middle frame 3 is located on a side of the support portion 322 close to the display panel 1 and is partially embedded in the support portion 322. The glass component 31 is annular. Specifically, as Figure 2 As shown, the glass member 31 is in a rectangular ring shape and is arranged corresponding to the edge of the display panel 1. The glass member 31 has a first surface 311 facing away from the backlight module 2, and the plastic member 32 wraps the glass member 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 the display panel 1 and the glass member 31 of the composite middle frame 3 are welded in the welding area H, the position where the display panel 1 and the glass member 31 are melted and combined corresponds to the first surface 311, and is not at the position corresponding to the inner side surface of the glass member 31. The surface of the array substrate 11 close to the glass piece 31 (i.e., the surface facing away from the opposing substrate 12) is bonded to the first surface 311 of the glass piece 31. When the display panel 1 and the glass piece 31 are laser welded in the welding area H, part of the glass at the bonding position of the array substrate 11 and the glass piece 31 melts and combines, so that the side of the array substrate 11 facing away from the opposing substrate 12 is connected to the glass piece 31, thereby fixing 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 a side of the opposing substrate 12 away from the composite middle frame 3, the welding area H is annular, and the welding area H is arranged along the edge of the display panel 1. When a laser is used to perform laser welding on the display panel 1 and the glass component 31 in the welding area H, along the circumference of the display panel 1, part of the glass component 31 is welded and fixed to the opposing substrate 12, and the other part is welded and fixed to the array substrate 11.

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

[0105] In this embodiment, the first surface 311 of the glass member 31 is provided with a second contact pad 33 at a position corresponding to the bonding area B, and the second surface 112 of the array substrate 11 is provided with a first contact pad 113 at a position corresponding to the bonding area B. Before laser welding the display panel 1 and the glass member 31 in step S2, a flexible circuit board 7 needs to be provided first, and one end of the flexible circuit board 7 is bonded to the second contact pad 33 of the first surface 311 of the glass member 31 (e.g., Figure 7 As shown in the figure, when the display panel 1 is placed on one side of the composite middle frame 3 in step S2, a conductive glue 34 is arranged between the second contact pad 33 and the first contact pad 113, so that the first contact pad 113 arranged at the bonding area B position on the second surface 112 of the array substrate 11 and the second contact pad 33 arranged at the bonding area B position on the first surface 311 of the glass member 31 are electrically connected to each other through the conductive glue 34 arranged between the first contact pad 113 and the second contact pad 33. At the remaining positions except the position of the protruding portion 111, the surface of the substrate 12 away from the array substrate 11 is arranged to be fitted with 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 fixed by laser welding using 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, and the welding speed during laser welding is 3-8 mm / S, preferably, the welding speed during laser welding is 5 mm / S. The above parameters are used for laser welding, and the welding effect is better, the display panel 1 and the glass member 31 are not easy to break, and the display effect of the display module 100 will not be adversely affected.

[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 to affect the display effect and service life of the display module 100, thereby 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 member 31 of the composite middle frame 3, the welding position may be inspected to ensure welding quality and to ensure that there are no defects such as pores, cracks, discontinuities, etc. at the welding position.

[0109] S3 : Assemble the welded display panel 1 and the composite middle frame 3 onto the backlight module 2 in an integrated manner, and connect the plastic component 32 to the back plate 21 .

[0110] Specifically, the display panel 1 and the composite middle frame 3 that have been welded in step S2 are integrally assembled on 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 the side of the bottom plate 211 close to the display panel 1, and is surrounded with the bottom plate 211 to form a receiving space 23. The body 321 is arranged around the outside of the annular side plate 212, and the support portion 322 is located between the annular side plate 212 and the display panel 1. Specifically, the body 321 of the plastic part 32 of the composite middle frame 3 is sleeved on the outer side of the annular side plate 212 of the back plate 21, and the outer side of the annular side plate 212 is fitted with the inner side of the body 321. The surface of the support portion 322 away from the display panel 1 is abutted and fitted with the end face of the annular side plate 212 away from the bottom plate 211. It can be understood that by placing the plastic part 32 of the composite middle frame 3 outside, when there is a problem with the display module 100 and repair is required, there is no need to disassemble the display panel 1 separately. This can be achieved by removing the connection between the plastic part 32 of the composite middle frame 3 and the back panel 21. The above arrangement makes it easier to repair the display module 100.

[0111] Specifically, Figure 1 As shown, in some embodiments, the annular side plate 212 of the back plate 21 includes a step portion 213 and a vertical extension portion 214, and the step portion 213 connects the bottom plate 211 and the vertical extension portion 214. The main body 321 of the plastic part 32 of the composite middle frame 3 is located at the top of the step portion 213 and is arranged around the vertical extension portion 214, and the inner side surface of the main body 321 is arranged to fit the outer side surface of the vertical extension portion 214. Among them, the main body 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 by structural parts such as screws, thereby completing the fixed connection between the back plate 21 and the composite middle frame 3.

[0112] Further, in some embodiments, the display module 100 may also 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 arranged on one side of the step portion 213, so that after the backlight module 2 and the composite middle frame 3 are assembled, the first sealing ring 4 is arranged between the step portion 213 and the body portion 321 and around the vertical extension portion 214, and 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. The plastic part 32 of the composite middle frame 3 and the back plate 21 of the backlight module 2 are sealed, which is conducive to preventing water vapor or dust from entering the gap between the composite middle frame 3 and the back plate 21 into the interior of the display module 100 to affect the display performance, and further improve the waterproof and dustproof effect of the display module 100. Among them, the first sealing ring 4 can be made of materials such as silicone and rubber.

[0113] In some embodiments, the display module 100 also includes a rear shell 5 and a logic component 6, and the logic component 6 is disposed in the rear shell 5. In one embodiment, after the display panel 1 and the composite middle frame 3 are integrated onto the backlight module 2, the flexible circuit board 7 can be bonded to 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 of 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 shell 5, thereby realizing the electrical connection between the driving circuit layer and the logic component 6, which is convenient for driving and controlling the display panel 1 to realize the display function.

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

[0115] In another embodiment, if Figure 4 and Figure 5As shown, 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, and the second surface 112 of the array substrate 11 is arranged toward the first surface 311 of the glass member 31. The first surface 311 of the glass member 31 is provided with a second contact pad 33 at a position corresponding to the bonding area B. Before the display panel 1 and the glass member 31 are laser welded in step S2, one end of the flexible circuit board 7 is first bonded to the second contact pad 33 of the first surface 311 of the glass member 31, and when the display panel 1 and the composite middle frame 3 bonded with the flexible circuit board 7 are aligned and assembled, the array substrate 11 is provided with a second contact pad 33 at the first surface 311 of the glass member 31. The first contact pad 113 of the substrate 11 and the second contact pad 33 of the glass member 31 are electrically connected to each other through the conductive adhesive 34; when the display panel 1 and the composite middle frame 3 are assembled onto the backlight module 2 in an integrated manner after welding in step S3, the other end of the flexible circuit board 7 is extended to the side of the back plate 21 away from the display panel 1 through the notch 35 of the support portion 322 and the gap between the back plate 21 and the optical component 22 in sequence; after the display panel 1 and the composite middle frame 3 are assembled onto the backlight module 2 in an integrated manner, the other end of the flexible circuit board 7 is electrically connected to the connector 61 of the logic component 6 arranged in the rear shell 5.

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

[0117] S4: Conduct water and dust resistance test and light aging test.

[0118] Specifically, the assembled display module 100 is subjected to a waterproof and dustproof test and a light aging test. Specifically, the test environment for the waterproof and dustproof test can be a simulated rainstorm environment, and the test duration is 2 hours. The test conditions for 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.

[0119] The structure of the display module 100 can be as follows Figure 1 or Figure 4Any display module 100 adopts the structure of the above display module 100 to perform the above waterproof and dustproof test. The test results show that the display module 100 is not infiltrated with water or dust, proving that both of the above two display modules 100 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 needs of special usage scenarios.

[0120] The above light aging test was performed using the structure of the display module 100 . The test results showed that the performance of the display module 100 did not decrease significantly, proving that both of the above two display modules 100 have good anti-aging performance.

[0121] The display module 100 structure 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 descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display module, characterized in that: include: The display panel comprises an array substrate and an opposing substrate which are arranged opposite to each other; Backlight module, including back panel and optical components; The back plate is surrounded to form a receiving space, and the optical component is arranged in the receiving space; A composite middle frame is disposed between the backlight module and the display panel and connects the backlight module and the display panel; the composite middle frame includes glass parts and plastic parts connected to each other, and the composite middle frame is prepared by a secondary molding process; Wherein, the display module has a welding area, in which the display panel and the glass component are fixedly connected through a laser welding process; and the plastic component is connected to the back panel.

2. The display module according to claim 1, characterized in that: The plastic part comprises a main body and a supporting part, both of which are ring-shaped; the main body extends along the thickness direction of the display module, and the supporting part is connected to the inner side surface of the main body; The supporting portion is located between the display panel and the backlight module; The glass piece is located on a side of the support portion close to the display panel and is partially embedded in the support portion; the glass piece is annular and has a first surface facing away from the backlight module; the plastic piece wraps the glass piece and exposes the first surface; An orthographic projection of the weld zone is located within the first surface.

3. The display module according to claim 2, characterized in that: The welding area is annular; The array substrate is located at a side of the counter substrate close to the backlight module. In the welding area, the array substrate is fixedly connected to the glass member by a laser welding process.

4. The display module according to claim 2, characterized in that: The welding area is annular; The array substrate is located at a side of the opposite substrate away from the backlight module. Along the first direction, the size of the array substrate is larger than that of the opposite substrate. The array substrate protrudes from the opposite 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 circumference of the display panel, in the welding area corresponding to the protrusion, the array substrate and the glass piece are fixedly connected by a laser welding process, and in the remaining welding areas, the counter substrate and the glass piece are fixedly connected by a laser welding process.

5. The display module according to claim 4, characterized in that: The protrusion 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 main body; The array substrate comprises a driving circuit layer, the array substrate has a second surface facing the counter substrate, a first contact pad is arranged at a position of the second surface corresponding to the bonding area, and the first contact pad is electrically connected to the driving circuit layer; A second contact pad is arranged at a position of the first surface corresponding to the bonding area; the display module also 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 arranged 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, characterized in that: The support portion has a notch at one end away from the main body portion, and the notch is arranged corresponding to the position of the second contact pad; The display module further comprises a rear shell and a logic component, wherein the rear shell is arranged on a side of the back plate away from the display panel, and the logic component is arranged in the rear shell; the logic component comprises a connector; The other end of the flexible circuit board extends into the rear shell via the notch and the gap between the back plate and the optical component in sequence, and is electrically connected to the connector; A driving chip is arranged on the flexible circuit board.

7. The display module according to claim 2, characterized in that: The back plate includes a bottom plate and an annular side plate, wherein the annular side plate is connected to a side of the bottom plate close to the display panel and is surrounded by the bottom plate to form the accommodation space; The main body is disposed around the outer side of the annular side plate.

8. The display module according to claim 7, characterized in that: The annular side plate includes a step portion and a vertical extension portion, wherein the step portion connects the bottom plate and the vertical extension portion; the main body portion is located at the top of the step portion and is arranged around the vertical extension portion, and the inner side surface of the main body portion is arranged in contact with the outer side surface of the vertical extension portion; The display module further includes a first sealing ring, which is disposed between the step portion and the main body portion and surrounds the vertical extension portion.

9. The display module according to claim 1, characterized in that: When the display panel and the glass member are laser welded 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 between the display panel and the glass piece 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: include: A display panel, a backlight module and a composite middle frame are provided; wherein the display panel comprises an array substrate and an opposing substrate arranged oppositely; the backlight module comprises a back plate and an optical component; the back plate is surrounded to form a receiving space, and the optical component is arranged in the receiving space; the composite middle frame comprises glass parts and plastic parts connected to each other, and the composite middle frame is prepared by a secondary molding 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 a welding area; Assemble the welded display panel and the composite middle frame integrally onto the backlight module, and connect the plastic part to the back plate; Waterproof and dustproof test and light aging test are carried out; wherein, the test environment of the waterproof and dustproof test is a simulated rainstorm environment, and the test duration is 2 hours; the test conditions of the light aging test are: first ultraviolet light irradiation for 120 hours, and then placed at 85°C, 85% RH for 500 hours.

Images