Display module and manufacturing method

Abstract

The application provides a display module and a manufacturing method. The display module comprises a display panel, a polaroid and a back plate layer. The back plate layer comprises at least a first back plate and a second back plate. The orthographic projection of the polaroid and the first back plate on the display panel is located in the display area of the display panel. The orthographic projection of the second back plate on the display panel is located in the terminal area of the display panel. An exhaust structure is arranged at the junction of the first back plate and the second back plate. In the application, the back plate layer comprises at least the first back plate and the second back plate, and the exhaust structure is arranged at the junction of the first back plate and the second back plate. The gas not discharged in time at the film layer difference position in the attaching process can be discharged through the exhaust structure, so that the bubble phenomenon caused by the virtual attachment at the film layer difference position is prevented or reduced, the alignment accuracy of the terminal binding process is effectively improved, and the terminal binding yield is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display technology, and in particular to a display module and a manufacturing method. BACKGROUND

[0002] In a large-size OLED display screen, a polarizing sheet is usually attached on a display area of a display panel to ensure normal display of the display screen, and the polarizing sheet does not cover a terminal area of the display panel to realize terminal binding of the terminal area.

[0003] Thus, a film layer difference exists between the display area and the terminal area of the display module, and when a back plate is attached to the display panel, a bad phenomenon such as an attachment bubble is easily generated between the back plate and the display panel, which further affects alignment accuracy of a terminal part binding process of the display panel and reduces a terminal binding yield. SUMMARY

[0004] The present application provides a display module and a manufacturing method to improve the technical problem that a bad phenomenon such as an attachment bubble is generated between a back plate and a display panel due to a film layer difference between a display area and a terminal area in a current OLED display screen.

[0005] To solve the above technical problem, the technical solution provided by the present application is as follows:

[0006] The present application provides a display module, comprising:

[0007] a display functional layer, comprising a display area and a terminal area located on at least one side of the display area;

[0008] a polarizing layer, disposed on an out-light side of the display functional layer, a normal projection of the polarizing layer on the display functional layer being located in the display area; and

[0009] a back plate layer, disposed on a side of the display functional layer away from the out-light direction;

[0010] wherein the back plate layer at least comprises a first back plate and a second back plate, a normal projection of the first back plate on the display functional layer and a normal projection of the polarizing layer on the display functional layer being located in the display area, and a normal projection of the second back plate on the display functional layer being located in the terminal area;

[0011] and an exhaust structure is arranged at a junction of the first back plate and the second back plate.

[0012] In the display module of the present application, the first back plate and the second back plate are integrally formed, and the exhaust structure at least comprises a plurality of exhaust holes.

[0013] The exhaust hole penetrates the back plate layer along the light-out direction of the display function layer, and a plurality of the exhaust holes are arranged along the extension direction of the joint line of the first back plate and the second back plate.

[0014] In the display module, the first back plate and the second back plate are integrally formed, and the exhaust structure at least comprises an exhaust groove.

[0015] The exhaust groove penetrates the back plate layer along the light-out direction of the display function layer, and the exhaust groove is arranged along the extension direction of the joint line of the first back plate and the second back plate.

[0016] In the display module, in the direction of the top view of the display module, the normal projection of the exhaust structure on the display function layer coincides with the edge of the normal projection of the polarizing layer on the display function layer.

[0017] In the display module, the ratio of the thickness value of the display function layer along the light-out direction to the aperture value of the exhaust hole is 1 / 2 to 1.

[0018] In the display module, the ratio of the thickness value of the display function layer along the light-out direction to the width value of the exhaust groove along the first direction is 1 / 2 to 1.

[0019] The first direction is the direction from the first back plate to the second back plate.

[0020] In the display module, in the light-out direction of the display function layer, the ratio of the thickness of the display function layer to the thickness of the polarizing layer is greater than 1 / 5.

[0021] In the display module, the display module further comprises a first adhesive layer arranged between the back plate layer and the display function layer.

[0022] In the light-out direction of the display function layer, the ratio of the thickness of the first adhesive layer to the thickness of the display function layer is 1 to 3.

[0023] The application further provides a manufacturing method of a display module, comprising:

[0024] Attaching a polarizing layer on the light-out side of the display function layer;

[0025] Cutting the back plate layer material according to the specifications of the display function layer to obtain a back plate material layer corresponding to the shape and size of the display function layer;

[0026] Forming an exhaust structure on the back plate material layer;

[0027] The back plate material layer with the exhaust structure is attached to the backlight side of the display function layer.

[0028] In the manufacturing method of the display module, the step of forming the exhaust structure on the back plate material layer comprises:

[0029] Based on the position of the junction line between the display area and the terminal area of the display function layer, a cutting line corresponding to the position of the junction line is drawn on the back plate material layer.

[0030] The back plate material layer is virtually cut or physically cut along the cutting line to form a first back plate and a second back plate.

[0031] Advantages

[0032] In the display module, the back plate layer is provided with at least a first back plate and a second back plate, the first back plate corresponds to the display area of the display panel and the polarizing layer on the display area, the second back plate corresponds to the terminal area of the display panel, and an exhaust structure is arranged at the junction position of the first back plate and the second back plate. When the back plate is attached to the display panel, the position of the film layer gap formed by the polarizing layer corresponds to the position of the exhaust structure, so that the gas not timely discharged from the film layer gap during the attachment process can be discharged through the exhaust structure, thereby preventing or reducing the bubble phenomenon caused by the film layer gap due to the virtual attachment, effectively improving the alignment accuracy of the terminal binding process, and improving the terminal binding yield. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 is a first overall structure schematic diagram of the display module described in the present application;

[0035] Figure 2 is a second overall structure schematic diagram of the display module described in the present application;

[0036] Figure 3 is a first plane structure schematic diagram of the back plate layer described in the present application;

[0037] Figure 4 is a second plane structure schematic diagram of the back plate layer described in the present application;

[0038] Figure 5 is a partial film layer structure schematic diagram of the display module described in the present application;

[0039] Figure 6 is a manufacturing flowchart of the display module described in the present application;

[0040] Figure 7 is a film layer structure schematic diagram of the backplate material layer described in the present application.

[0041] Explanation of reference signs:

[0042] Display panel 100, display area 101, terminal area 102, flexible substrate 110, light-emitting functional layer 120, polarizing layer 200, backplate layer 300, backplate body 301, protective film 302, release film 303, first backplate 310, second backplate 320, exhaust structure 400, exhaust hole 410, exhaust groove 420, first adhesive layer 500. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawings; and "inner" and "outer" are relative to the outline of the device.

[0044] In a large-size OLED display screen, a polarizing sheet is usually attached on the display area of the display panel to ensure normal display of the display screen, and the terminal area of the display panel is not covered by the polarizing sheet to realize terminal binding of the terminal area. Thus, there is a film layer difference between the display area and the terminal area of the display module, and when the backplate is attached to the display panel, the backplate and the display panel are prone to produce attachment bubbles and other defects, thereby affecting the alignment accuracy of the terminal part binding process of the display panel and reducing the terminal binding yield. The present application proposes the following solutions based on the above technical problems.

[0045] Please refer to Figures 1 to 7The display module provided in the application comprises a display panel 100, a polarizing layer 200 arranged on the light-emitting side of the display panel 100, and a back plate layer 300 arranged on the side of the display panel 100 away from the light-emitting direction. The display panel 100 comprises a display area 101 and a terminal area 102 arranged on at least one side of the display area 101. The orthographic projection of the polarizing layer 200 on the display panel 100 is located in the display area 101. The back plate layer 300 comprises at least a first back plate 310 and a second back plate 320. The orthographic projection of the first back plate 310 on the display panel 100 is located in the display area 101 together with the orthographic projection of the polarizing layer 200 on the display panel 100. The orthographic projection of the second back plate 320 on the display panel 100 is located in the terminal area 102. An exhaust structure 400 is arranged at the junction of the first back plate 310 and the second back plate 320.

[0046] In the application, the back plate layer 300 comprises at least a first back plate 310 and a second back plate 320. The first back plate 310 corresponds to the display area 101 of the display panel 100 and the polarizing layer 200 on the display area 101. The second back plate 320 corresponds to the terminal area 102 of the display panel 100. An exhaust structure 400 is arranged at the junction of the first back plate 310 and the second back plate 320. When the back plate is attached to the display panel 100, the position of the film layer gap formed by the polarizing layer 200 corresponds to the position of the exhaust structure 400. Therefore, the gas not timely exhausted from the film layer gap position can be exhausted through the exhaust structure 400 during the attachment process, thereby preventing or reducing the bubble phenomenon caused by the film layer gap position due to the virtual attachment, effectively improving the alignment accuracy of the terminal binding process, and improving the terminal binding yield.

[0047] The technical solutions of the application will be described in combination with specific embodiments. The following will be described in detail. It should be noted that the description order of the following embodiments is not limited to the preferred order of the embodiments.

[0048] In the embodiment, the display panel 100 can be a flexible panel. The display panel 100 can comprise a flexible substrate 110 and a light-emitting functional layer 120 arranged on the flexible substrate 110. The flexible substrate 110 can be a polyimide (PI) substrate, and the light-emitting functional layer 120 can be an OLED light-emitting layer, a Mini-LED light-emitting layer, or a Micro-LED light-emitting layer, etc. Correspondingly, the display panel 100 can be an OLED panel, a Mini-LED panel, a Micro-LED panel, etc. The display module can be applied to large-size display devices, such as televisions, display screens, computers, etc.

[0049] In the embodiment, the polarizing layer 200 can be a polarizing sheet arranged on the display area 101 of the display panel 100, and a normal projection of the polarizing sheet on the display panel 100 completely coincides with the display area 101 of the display panel 100 to ensure normal display of the display area 101. The polarizing sheet can be composed of a polyvinyl alcohol (PVA) material layer, a triacetate cellulose (TAC) material layer, a pressure-sensitive adhesive layer, a release film 303 layer, a protective film 302 layer, and various film layers.

[0050] In the embodiment, the back plate layer 300 can be arranged on a side of the display panel 100 away from the polarizing sheet, and a normal projection of the display panel 100 on the back plate layer 300 can completely fall within the back plate layer 300, so that the back plate layer 300 sufficiently and uniformly supports the display panel 100. The back plate layer 300 can be made of a flexible organic material such as polyimide (PI), polyethylene terephthalate (PET), polyester (BOPET), and the like.

[0051] Please refer to Figure 1 , Figure 1 is a first overall structure schematic diagram of the display module described in the application. In the display module of the application, the first back plate 310 can be integrally formed with the second back plate 320, that is, the first back plate 310 and the second back plate 320 can be made of the same back plate material, so as to avoid differences in the back plate material corresponding to the display area 101 and the terminal area 102 of the display panel 100, and thus improve the support uniformity and stability of the back plate layer 300 to the display area 101 and the terminal area 102.

[0052] In the embodiment, the first back plate 310 and the second back plate 320 can be arranged in the same layer, that is, the display module is a non-folded planar display module.

[0053] In the embodiment, the exhaust structure 400 can include a plurality of exhaust holes 410, and the plurality of exhaust holes 410 can be formed by virtually cutting the back plate material. The exhaust holes 410 can penetrate the back plate layer 300 along the light-emitting direction of the display panel 100, so that the gas between the back plate layer 300 and the display panel 100 during the process of attaching the back plate layer 300 can be exhausted through the exhaust holes 410, avoiding the formation of bubbles. Moreover, the exhaust holes 410 can also play a good stress release role on the stress concentration at the film layer difference position, thereby reducing the stress concentration at the film layer difference position, relieving the stress fatigue of the back plate layer 300 at the film layer difference position, and prolonging the service life of the back plate layer 300.

[0054] In the embodiment, the plurality of exhaust holes 410 can be arranged along the extension direction of the junction line of the first back plate 310 and the second back plate 320. Further, the plurality of exhaust holes 410 can be equidistantly arranged along the extension direction of the junction line of the first back plate 310 and the second back plate 320, so that the plurality of exhaust holes 410 are uniformly distributed at the film layer difference position caused by the polarizing layer 200, thereby better eliminating bubbles and other defects.

[0055] Referring to Figure 2 , the second overall structure schematic diagram of the display module is shown. In the display module, the exhaust structure 400 can also include at least one exhaust groove 420, which can penetrate the back plate layer 300 along the light-emitting direction of the display panel 100. Further, the exhaust groove 420 can be arranged along the extension direction of the junction line of the first back plate 310 and the second back plate 320.

[0056] In the embodiment, the number of exhaust grooves 420 can be one or more. The plurality of exhaust grooves 420 can be arranged in parallel along the connecting direction of the first back plate 310 and the second back plate 320, that is, the plurality of exhaust grooves 420 can extend along the junction line direction of the first back plate 310 and the second back plate 320. The plurality of exhaust grooves 420 need to be closely arranged near the junction line of the first back plate 310 and the second back plate 320, so as to sufficiently exhaust the virtual adhering gas at the film layer difference position and eliminate bubbles.

[0057] In the embodiment, the exhaust groove 420 has a similar function to the exhaust hole 410 in the foregoing embodiment, and is mainly used for exhausting gas and releasing stress. It should be noted that the exhaust groove 420 in the embodiment can be formed by actually cutting the back plate material, which is compared with virtually cutting the back plate layer 300 to form a plurality of exhaust holes 410 in the foregoing embodiment. The actual cutting tool used to form the exhaust groove 420 is easier to manufacture than the punching tool used to form the exhaust hole 410, and the later maintenance is simpler, which can effectively reduce the equipment cost.

[0058] Referring to Figure 1 and Figure 2 , in the display module, in the direction of the top view of the display module, the orthogonal projection of the exhaust structure 400 on the display panel 100 coincides with the edge of the orthogonal projection of the polarizing layer 200 on the display panel 100. In other words, the edge of the polarizing layer 200 close to the second back plate 320 side on the orthogonal projection of the back plate layer 300 can fall into the exhaust structure 400, that is, fall into the exhaust hole 410 or the exhaust groove 420.

[0059] The film layer difference position caused by the polarizing layer 200 can be directly and quickly opposite to the exhaust structure 400, so as to more directly and quickly disperse the virtual paste bubble and stress concentration of the film layer difference position to the exhaust structure 400, eliminate the virtual paste bubble from the formation stage, prevent or reduce the effect of the virtual paste bubble and other adverse effects.

[0060] Please refer to Figure 1 and Figure 3 , Figure 3 is a first planar structure schematic diagram of the back plate layer 300 described in the present application. In the display module of the present application, the ratio of the thickness value d1 of the display panel 100 along the light emitting direction to the aperture value d2 of the exhaust hole 410 can be 1 / 2 to 1. As a preferred, the ratio of the thickness value of the display panel 100 along the light emitting direction to the aperture value of the exhaust hole 410 is 3 / 5. For example, in the present embodiment, the thickness value of the display panel 100 along the light emitting direction can be 30 microns, and the aperture value of the exhaust hole 410 can be 50 microns.

[0061] In the present embodiment, by setting the aperture value of the exhaust hole 410 to be 1 to 2 times the thickness value of the display panel 100 along the light emitting direction, the size of the exhaust hole 410 can be minimized under the premise of meeting the equipment precision, so as to achieve good exhaust effect, and reduce the influence on the support performance of the entire back plate layer 300, so that the first back plate 310 and the second back plate 320 can be in the form of "breakage" but still have "overall" support performance, and the support uniformity is better.

[0062] Please refer to Figure 1 and Figure 4 , Figure 4 is a second planar structure schematic diagram of the back plate layer 300 described in the present application. In the display module of the present application, the ratio of the thickness value d1 of the display panel 100 along the light emitting direction to the width value d3 of the exhaust groove 420 along the first direction can be 1 / 2 to 1, wherein the first direction is the direction from the first back plate 310 to the second back plate 320. For example, the thickness value d1 of the display panel 100 along the light emitting direction can be 30 microns, and the width value d3 of the exhaust groove 420 along the first direction can be 50 microns.

[0063] In the present embodiment, the size requirement of the exhaust groove 420 is similar to the aperture value requirement of the exhaust hole 410 in the above embodiment, so the effects that the exhaust hole 410 can achieve under this size condition can also be achieved.

[0064] It should be noted that since the cutting tool for cutting the back plate layer 300 to form the exhaust groove 420 is easy to manufacture, and the number of the exhaust groove 420 can be set to be multiple, the width d3 of the exhaust groove 420 in the first direction can be made smaller. That is, when multiple exhaust grooves 420 are arranged between the first back plate 310 and the second back plate 320, the ratio of the thickness value d1 of the display panel 100 in the light emitting direction to the width value d3 of the exhaust groove 420 in the first direction can be greater than 1.

[0065] Referring to Figure 1 In the display module of the present application, the ratio of the thickness d1 of the display panel 100 to the thickness d4 of the polarizing layer 200 in the light emitting direction of the display panel 100 can be greater than 1 / 5. As mentioned above, the thickness value d1 of the display panel 100 in the light emitting direction can be 30 microns, and then the thickness d4 of the polarizing layer 200 is less than 150 microns.

[0066] The thickness of the polarizing layer 200 in the present embodiment is less than the thickness of the polarizing layer 200 in the conventional design (generally 153 microns), that is, by thinning the thickness of the polarizing layer 200, the film layer difference caused by the polarizing layer 200 can be reduced, and the adverse problems such as virtual bubble caused by the film layer difference can be alleviated.

[0067] Referring to Figure 5 , Figure 5 is a partial film layer structure diagram of the display module of the present application. In the display module of the present application, the display module can further include a first adhesive layer arranged between the back plate layer 300 and the display panel 100, and the first adhesive layer adhesively connects the back plate layer 300 and the display panel 100.

[0068] In the present embodiment, the ratio of the thickness d5 of the first adhesive layer to the thickness d1 of the display panel 100 in the light emitting direction of the display panel 100 is 1 to 3. For example, the thickness value d1 of the display panel 100 in the light emitting direction of the display panel 100 can be 30 microns to 35 microns, and the thickness value d5 of the first adhesive layer can be 35 microns to 105 microns.

[0069] In the embodiment, the thickness value d5 of the first adhesive layer is set to 35-105 microns, which is greater than the thickness value of the adhesive layer in the conventional design (generally close to the thickness value of the panel, i.e., generally 30-35 microns), so that the first adhesive layer 500 is thicker and has better extrusion deformation capability. When extrusion occurs, the first adhesive layer 500 can flow into the area corresponding to the film layer discontinuity position, fill the bubble area generated by the virtual attachment of the back plate layer 300 at the film layer discontinuity position, and eliminate the virtual attachment bubbles.

[0070] In the embodiment, the back plate layer 300 is provided to include at least a first back plate 310 and a second back plate 320, and an exhaust structure 400 is provided at the junction of the first back plate 310 and the second back plate 320. During the attachment of the back plate to the display panel 100, the film layer discontinuity position formed by the polarizing layer 200 corresponds to the position of the exhaust structure 400, so that the gas not timely discharged at the film layer discontinuity position during the attachment process can be discharged through the exhaust structure 400, thereby preventing or reducing the bubble phenomenon at the film layer discontinuity position due to virtual attachment, effectively improving the alignment accuracy of the terminal binding process, and improving the terminal binding yield.

[0071] The embodiment also provides a manufacturing method of a display module. Referring to Figure 6 , Figure 6 is a flowchart of the manufacturing process of the display module described in the present application. The manufacturing method of the display module can include:

[0072] S100, bonding a polarizing layer 200 to the light-emitting side of a display panel 100.

[0073] S200, cutting a back plate layer 300 material according to the specifications of the display panel 100 to obtain a back plate material layer having the same shape and size as the display panel 100.

[0074] S300, forming an exhaust structure 400 on the back plate material layer.

[0075] S400, bonding the back plate material layer with the exhaust structure 400 to the backlight side of the display panel 100.

[0076] In the manufacturing method of the display module, the S100 step can include:

[0077] S110, determining the junction line of a display area 101 and a terminal area 102 on a display panel 100.

[0078] S120, cutting a polarizing material with the same size as the display area 101 on the display panel 100.

[0079] S130, the cut polarizing material is attached to the light-emitting surface of the display panel 100, and the side edge of the polarizing material is flush with the junction line of the display area 101 and the terminal area 102, and the polarizing material completely coincides with the display area 101.

[0080] In the embodiment, the S200 step can include:

[0081] S210, determine the shape and size of the display panel 100.

[0082] S220, according to the size of the display panel 100, the backboard layer 300 material is cut into a backboard material layer with the same shape and size.

[0083] In the embodiment, the S300 step can include:

[0084] S310, based on the junction line position of the display area 101 and the terminal area 102 of the display panel 100, draw a cutting line corresponding to the junction line position on the backboard material layer.

[0085] Please refer to Figure 7 , Figure 7 is a film layer structure diagram of the backboard material layer described in the application. In the embodiment, the backboard material layer can be cut into a separate film layer material, and the backboard material layer can include a backboard body 301 and a protective film 302 and a release film 303 attached to the two side surfaces of the backboard body 301 respectively. The cutting line can be drawn on the release film 303.

[0086] S320, along the cutting line, the backboard material layer is virtually cut open or physically cut off to form a first backboard 310 and a second backboard 320.

[0087] In the embodiment, the backboard material layer is virtually cut open or physically cut off along the cutting line, which can be understood as: the release film 303 and the backboard body 301 of the backboard material layer are virtually cut open or physically cut off, and the protective film 302 is not cut.

[0088] In the embodiment, the S400 step can include:

[0089] S410, tear off the release film 303 of the backboard material layer, and move the backboard body 301 towards the backlight side of the display panel 100.

[0090] S420, align the cutting line on the backboard body 301 with the junction line of the display area 101 and the terminal area 102 on the display panel 100, and then attach the backboard body 301 to the backlight surface of the display panel 100.

[0091] In the embodiment, after the composite of the back plate layer 300 is completed, if other film layers need to be compounded on the side of the back plate layer 300 away from the display panel 100, the protective film 302 on the back plate body 301 can be removed, and then other film layers are compounded on the side covered by the protective film 302.

[0092] The display module and the manufacturing method provided by the embodiment of the present application can form the exhaust structure 400 before the material of the back plate layer 300 is attached to the display panel 100, so that damage to the display panel 100 caused by forming the exhaust structure 400 after the back plate material layer is compounded on the display panel 100 is avoided, thereby improving the quality stability of the display module.

[0093] The display module and the manufacturing method provided by the embodiment of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A display module, characterized by The display module comprises: a display panel comprising a display area and a terminal area located on at least one side of the display area; a polarizing layer arranged on the light-emitting side of the display panel, a projection of the polarizing layer on the display panel being located in the display area; and a back plate layer arranged on the side of the display panel away from the light-emitting direction; wherein the back plate layer comprises at least a first back plate and a second back plate, a projection of the first back plate on the display panel being located in the display area together with a projection of the polarizing layer on the display panel, and a projection of the second back plate on the display panel being located in the terminal area; and an exhaust structure is arranged at the junction of the first back plate and the second back plate; in the top view of the display module, a projection of the exhaust structure on the display panel coincides with the edge of a projection of the polarizing layer on the display panel; in the light-emitting direction of the display panel, the ratio of the thickness of the display panel to the thickness of the polarizing layer is greater than 1 / 5; the display module further comprises a first adhesive layer arranged between the back plate layer and the display panel; wherein, in the light-emitting direction of the display panel, the ratio of the thickness of the first adhesive layer to the thickness of the display panel is 1 to 3.

2. The display module of claim 1, wherein, The first back plate and the second back plate are integrally formed, and the exhaust structure comprises at least a plurality of exhaust holes; wherein the exhaust holes penetrate the back plate layer in the light-emitting direction of the display panel, and a plurality of the exhaust holes are arranged along the extension direction of the junction line of the first back plate and the second back plate.

3. The display module of claim 1, wherein, The first back plate and the second back plate are integrally formed, and the exhaust structure comprises at least an exhaust groove; wherein the exhaust groove penetrates the back plate layer in the light-emitting direction of the display panel, and the exhaust groove is arranged along the extension direction of the junction line of the first back plate and the second back plate.

4. The display module of claim 2, wherein, The ratio of the thickness value of the display panel in the light-emitting direction to the aperture value of the exhaust hole is 1 / 2 to 1.

5. The display module of claim 3, wherein, The ratio of the thickness value of the display panel in the light-emitting direction to the width value of the exhaust groove in the first direction is 1 / 2 to 1; wherein the first direction is the direction from the first back plate to the second back plate.

6. A manufacturing method of a display module, characterized by comprising: The display module comprises: a display panel comprising a display area and a terminal area located on at least one side of the display area; a polarizing layer arranged on the light-emitting side of the display panel, a projection of the polarizing layer on the display panel being located in the display area; and a back plate layer arranged on the side of the display panel away from the light-emitting direction; wherein the back plate layer comprises at least a first back plate and a second back plate, a projection of the first back plate on the display panel being located in the display area together with a projection of the polarizing layer on the display panel, and a projection of the second back plate on the display panel being located in the terminal area; and an exhaust structure is arranged at the junction of the first back plate and the second back plate; in the top view of the display module, a projection of the exhaust structure on the display panel coincides with the edge of a projection of the polarizing layer on the display panel; in the light-emitting direction of the display panel, the ratio of the thickness of the display panel to the thickness of the polarizing layer is greater than 1 / 5; in the light-emitting direction of the display panel, the ratio of the thickness of the first adhesive layer to the thickness of the display panel is 1 to 3.

7. The method of claim 6, wherein the display module is a liquid crystal display module. The first back plate and the second back plate are integrally formed, and the exhaust structure comprises at least a plurality of exhaust holes; wherein the exhaust holes penetrate the back plate layer in the light-emitting direction of the display panel, and a plurality of the exhaust holes are arranged along the extension direction of the junction line of the first back plate and the second back plate. The first back plate and the second back plate are integrally formed, and the exhaust structure comprises at least an exhaust groove; wherein the exhaust groove penetrates the back plate layer in the light-emitting direction of the display panel, and the exhaust groove is arranged along the extension direction of the junction line of the first back plate and the second back plate. The ratio of the thickness value of the display panel in the light-emitting direction to the aperture value of the exhaust hole is 1 / 2 to 1. The ratio of the thickness value of the display panel in the light-emitting direction to the width value of the exhaust groove in the first direction is 1 / 2 to 1; wherein the first direction is the direction from the first back plate to the second back plate. The display module comprises: a display panel comprising a display area and a terminal area located on at least one side of the display area; a polarizing layer arranged on the light-emitting side of the display panel, a projection of the polarizing layer on the display panel being located in the display area; and a back plate layer arranged on the side of the display panel away from the light-emitting direction; wherein the back plate layer comprises at least a first back plate and a second back plate, a projection of the first back plate on the display panel being located in the display area together with a projection of the polarizing layer on the display panel, and a projection of the second back plate on the display panel being located in the terminal area; and an exhaust structure is arranged at the junction of the first back plate and the second back plate; in the top view of the display module, a projection of the exhaust structure on the display panel coincides with the edge of a projection of the polarizing layer on the display panel; in the light-emitting direction of the display panel, the ratio of the thickness of the display panel to the thickness of the polarizing layer is greater than 1 / 5; in the light-emitting direction of the display panel, the ratio of the thickness of the first adhesive layer to the thickness of the display panel is 1 to 3. The first back plate and the second back plate are integrally formed, and the exhaust structure comprises at least a plurality of exhaust holes; wherein the exhaust holes penetrate the back plate layer in the light-emitting direction of the display panel, and a plurality of the exhaust holes are arranged along the extension direction of the junction line of the first back plate and the second back plate. The first back plate and the second back plate are integrally formed, and the exhaust structure comprises at least an exhaust groove; wherein the exhaust groove penetrates the back plate layer in the light-emitting direction of the display panel, and the exhaust groove is arranged along the extension direction of the junction line of the first back plate and the second back plate. The ratio of the thickness value of the display panel in the light-emitting direction to the aperture value of the exhaust hole is 1 / 2 to 1. The ratio of the thickness value of the display panel in the light-emitting direction to the width value of the exhaust groove in the first direction is 1 / 2 to 1; wherein the first direction is the direction from the first back plate to the second back plate. Based on the position of the intersection line between the display area and the terminal area of the display panel, a cutting line corresponding to the position of the intersection line is drawn on the back plate material layer; The back plate material layer is virtually cut open or physically cut off along the cutting line to form a first back plate and a second back plate.

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