Supporting plate assembly for folding screen, folding screen display module, and electronic device

Abstract

Provided are a supporting plate assembly for a folding screen, a folding screen display module, and an electronic device. The supporting plate assembly comprises: a cover plate (5), which corresponds to one non-bendable display panel (11, 12), an opening being formed between the cover plate (5) and a protective adhesive layer (9); an optical adhesive layer (4), one side surface of the optical adhesive layer (4) being bindingly fixed to the surface of a plate body of the cover plate (5), and the other side surface being directly or indirectly bindingly fixed to the back surface of one of the non-bending display panels (11, 12) of a folding screen; and a joining colloid (10), the joining colloid (10) carrying out joining between the plate body of the cover plate (5) and the protective adhesive layer (9) and sealing the opening. Thus, by means of the plate body of the cover plate (5) and the protective adhesive layer (9) being directly joined by the joining colloid (10), the joining colloid (10) can seal said gap, so that a discharge path is blocked, preventing an in-screen lighting line and other in-screen electronic devices from being affected by static electricity by means of said gap.

Description

Support plate assembly for folding screen, folding screen display module and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on August 11, 2023, with application number 202322178360.8 and invention name “Support plate assembly, folding screen display module and electronic device for folding screen”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a support plate assembly for a folding screen, a folding screen display module, and an electronic device. Background Art

[0003] With the continuous development of display module technology for mobile terminal devices such as mobile phones, foldable screens have become a trend in the development of display module technology. However, with the development of foldable display modules, the requirements for display modules are becoming higher and higher.

[0004] At present, the folding screen includes two non-bent display panels and a bent display panel connecting the two non-bent display panels. When the user uses the folding screen, due to the shifting of the folding layer, a certain gap (for example, about 200 microns) will be reserved between the fixed protective adhesive layer on the back of the bent display panel and the optical adhesive layer between the folding screen and the cover plate. There are inner screen bright lines and other inner screen electronic components in the gap, and the gap will generate electrostatic discharge, causing damage to the circuit, damaging the data line, touch line and inner screen electronic components. Therefore, there are many deficiencies.

[0005] Summary of the Invention

[0006] In order to solve the problem that static electricity discharge occurs due to reserved gaps in current folding screens, resulting in circuit damage and damaging of data lines, touch lines and internal screen electronic components, the embodiments of the present application provide a support plate assembly, a folding screen display module and an electronic device for a folding screen. By directly overlapping a covering colloid on the cover plate and the protective adhesive layer, the overlapping colloid can seal the above-mentioned gaps, thereby blocking the discharge path, and preventing static electricity from passing through the gaps to affect the bright lines of the internal screen and other internal screen electronic components.

[0007] The first aspect of the present application is a support plate assembly for a folding screen, wherein the folding screen includes two non-bending display panels and a bending display panel connecting the two non-bending display panels, the back of the bending display panel is surrounded by a fixed protective adhesive layer, and the support plate assembly includes: a cover plate corresponding to one of the non-bending display panels, and an opening is formed between the cover plate and the protective adhesive layer; an optical adhesive layer, one side surface of the optical adhesive layer is combined and fixed to the plate surface of the cover plate, and the other side surface is directly or indirectly combined and fixed to the back surface of one of the non-bending display panels of the folding screen; and a overlapping adhesive, the overlapping adhesive is overlapped between the cover plate body and the protective adhesive layer, and closes the opening.

[0008] In the embodiment of the present application, the folding screen is a foldable display screen device, specifically, including two non-bent display panels and a bent display panel connecting the two non-bent display panels. When displayed, they can be displayed separately or in combination. The present application does not impose any restrictions on this. Furthermore, the combined display and separate display of the present application can adopt existing display technology.

[0009] It should be noted that when the folding screen is in use, when the user folds the phone, the two non-folding display panels will fold together to form a smaller screen, which is convenient for carrying. When unfolding, the flexible panel will automatically unfold and form a large screen together with the two non-folding display panels.

[0010] In addition, it is understood that the display panel domains of the two non-bent display panels of the folding screen are covered with a back film. The back film of the folding screen is covered on the folding screen. The back film is a layer of thin film material. The folding screen is usually made of flexible materials, such as plastic or film, which is more easily scratched or damaged than traditional hard screens. The screen protector can be covered on the surface of the screen to form an additional protective adhesive layer to prevent scratches, fingerprints and other physical damage during daily use. It is understandable that the back film of the present application can be made of a highly transparent plastic material, such as a polymer material (such as polyester film), which is soft and durable. It is further understood that the selection of the back film material of the present application belongs to the existing known technology, and the core concept of the present application does not lie in this.

[0011] The support plate assembly of the present application is used to fix and support the non-bending display panel and the bending display panel of the folding screen, and can support the bending display panel to unfold and fold. Specifically, the support plate assembly includes a cover plate, the orthographic projection of the cover plate covers the orthographic projection of one of the non-bending display panels, and under the cover plate is an optical adhesive layer, which can be OCA glue (Optically Clear Adhesive). The cover plate is combined with the optical adhesive layer and fixed. The optical adhesive layer is directly or indirectly combined with one of the non-bending display panels and fixed. At the same time, the support plate assembly also includes a protective adhesive layer, which surrounds and is fixed to the bending display panel, so that the bending display panel can be connected with the non-bending display panel when folded and unfolded.

[0012] It should be understood that the protective adhesive layer is coated on the back of the curved display panel and extends to cover the junction between the non-curved display panel and the curved display panel, so that the non-curved display panel and the curved display panel always maintain a tight connection when unfolding and folding.

[0013] The cover plate and the non-bending display panel are directly or indirectly fixed via an optical adhesive layer. In some embodiments, a polarizing layer and an optical adhesive layer are provided between the non-bending display panel and the cover plate. In other embodiments, only an optical adhesive layer is provided between the non-bending display panel and the cover plate. This application does not impose any restrictions on this.

[0014] As can be seen from Figures 1 to 4, due to the folding and stacking, a gap of about 200 μm is reserved between the protective adhesive layer and the polarizing layer. The electrostatic discharge path will be on the fanout line (the circuit that distributes a signal line to multiple output ports). As a result, the fanout line will be damaged and fail in this gap, affecting the data line and touch line.

[0015] As can be seen from Figures 1 to 4, an opening is created between the protective adhesive layer and the cover plate due to the thickness of the optical adhesive layer and the polarizing layer. During daily use, since bright lines, touch lines and other electronic devices are arranged in the gaps within the openings, external electrons are easily absorbed to form static electricity. If the display panel is bent in the COP, the most vulnerable area of ​​the module, discharge occurs, resulting in abnormal display images, bright lines and touch failure. This is a common problem for both generations of folding screens, affecting the user experience.

[0016] As shown in Figures 5 to 10, in the embodiment of the present application, an overlapping colloid is overlapped between the protective adhesive layer and the cover plate to close the opening, thereby blocking the discharge path and preventing static electricity from passing through the gap to affect the inner screen bright line and other inner screen electronic devices.

[0017] It should be understood that the overlapping in the present application may refer to being inserted between the cover plate body and the protective adhesive layer in a slightly compressed state, with one side surface of the overlapping adhesive in contact with the cover plate body and the other side surface in contact with the protective adhesive layer, but it is not fixed in any fixed manner, that is, the overlapping adhesive can be pulled out from between the cover plate body and the protective adhesive layer by a large external force. During specific use, the overlapping adhesive is overlapped between the cover plate body and the protective adhesive layer, and because it is in a slightly compressed state, it is relatively stable. When the folding screen is folded, the overlapping adhesive is in a slightly compressed state and is not easy to fall out, but it can close the opening, thereby blocking the discharge path. When the folding screen is in the unfolded state, the protective adhesive layer is squeezed by the bending display panel, resulting in a smaller distance between the protective adhesive layer and the cover plate body (that is, because the protective adhesive layer is in a radially compressed state when the bending display panel is unfolded, the height of the protective adhesive layer becomes higher), and the degree of compression of the overlapping adhesive becomes higher, that is, the overlapping adhesive is inserted between the cover plate body and the protective adhesive layer in a "medium" compressed state.

[0018] It is further necessary to understand that the overlap in the present application may also be that one side surface is connected to one of the cover plate body and the protective adhesive layer in a fixed manner, and the other side surface is in contact with the other of the cover plate body and the protective adhesive layer in a loose manner. In this case, the difference from the above is that the overlapping adhesive cannot be pulled out from between the cover plate body and the protective adhesive layer by a large external force, but the specific use is similar to the above.

[0019] It should be understood that the "medium" compression and "micro" compression in the above-mentioned embodiment are only for the purpose of more clearly describing the changes in the overlapping colloid of the present application during use. If it is explained from a quantitative perspective, in the direction of the cover plate toward the protective adhesive layer, it is assumed that the height of the overlapping colloid in its natural state when stretched out is l1, and when the folding screen is folded, the height of the overlapping colloid when it is overlapped between the cover plate and the protective adhesive layer is l2, and when the folding screen is unfolded, the height of the overlapping colloid when it is overlapped between the cover plate and the protective adhesive layer is l3. Obviously, l1 is greater than l2, and l2 is greater than l3. At this time, the compression degree can be measured by l2 / l1 and l3 / l1. However, it should be noted that the calculation of the compression degree is only for example, and the core concept of the present application is not the calculation of the compression degree. The calculation method of the compression degree can adopt any existing calculation method, and the present application does not impose any restrictions or constraints on this.

[0020] In the embodiment of the present application, the non-bending display panel is covered with a back film, and a bracket is fixed on the non-display panel area, as shown in Figure 6. The bracket surrounds the non-bending display panel and is thicker than the plate body of the non-bending display panel. Therefore, when folded, the two non-bending display panels will not form contact due to the height limitation of the bracket, thereby avoiding direct contact between the two non-bending display panels, thereby forming pressure and causing damage to the non-bending display panel.

[0021] In addition, in the embodiment of the present application, what is not shown in the accompanying drawings is that when in use, the outer side of the protective adhesive layer is connected to the cover plate body through a hinge, and then the hinge and the above-mentioned support plate assembly are encapsulated in the outer shell. When the cover plate body is covered, it corresponds to the folding state of the folding screen. When the cover plate body is opened to a flat plate shape through the hinge, it is the unfolded state of the folding screen. This application does not elaborate on this.

[0022] It can be understood that in the embodiment of the present application, the optical adhesive layer is OCA adhesive, and the protective adhesive layer is MCL adhesive. The MCL (Micro Coating Layer) adhesive is a protective adhesive layer of the curved display panel arranged on the OLED display substrate. It can be understood that the MCL adhesive has fluidity before curing. According to conventional process technology, the curved display panel of the OLED display substrate is unfolded, then coated with adhesive, and finally cured to form a protective adhesive layer.

[0023] It can be understood that the overlapping colloid of the present application can be consistent with the material of the optical adhesive layer, or consistent with the material of the protective adhesive layer, or inconsistent with the material of the optical adhesive layer and the protective colloid. When it is consistent with the material of one of the adhesive layers, the same manufacturing process can be used during production, thereby saving process. The above-mentioned different processes and different materials have structural differences, that is, different materials and different processes may correspond to different structures, which are explained in detail below.

[0024] In one embodiment of the present aspect, a polarizer is fixed to the back surface of one of the non-bent display panels of the folding screen, the other side surface of the optical adhesive layer is indirectly combined and fixed to the back surface of one of the non-bent display panels of the folding screen through the polarizer, and the overlapping colloid is formed by extending integrally toward the opening through the optical adhesive layer.

[0025] The overlapping colloid in this embodiment is formed by an integral extension of the optical adhesive layer, that is, the overlapping colloid is also an optical adhesive layer. During production, the overall outward extension can be achieved through cutting or alignment. Then, the edge deformation of the optical adhesive layer after bonding and the action of gravity are utilized to form a cover for the opening described in this application, thereby achieving ESD discharge path blocking while keeping the original bonding process unchanged.

[0026] It should be noted that, in this embodiment, since the overlapping colloid is formed by extending the optical adhesive layer as a whole, the optical adhesive layer can be directly extended a certain distance during production, and the optical adhesive layer is combined and fixed to the cover plate body. Therefore, at this time, one side surface of the overlapping colloid is combined and fixed to the cover plate body, and the other side surface overlaps the elastic colloid, thereby closing the opening.

[0027] In another embodiment of the present aspect, a polarizer is fixed to the back surface of one of the non-bent display panels of the folding screen, and the other side surface of the optical adhesive layer is indirectly combined and fixed to the back surface of one of the non-bent display panels of the folding screen through the polarizer, and a gap is formed between the overlapping colloid and the optical adhesive layer.

[0028] Specifically, in this embodiment, the overlapping colloid is not formed by an integral extension of the optical adhesive layer, and can be formed by an independent process during the formation process. At this time, a gap is formed between the overlapping colloid and the optical adhesive layer. It can be understood that since the overlapping colloid is not an integral extension of the optical adhesive layer, one side surface of the overlapping colloid can be set to be fixed to or simply in contact with the surface of the cover plate body, that is, in this embodiment, one side surface of the overlapping colloid can be fixed to the surface of the cover plate body, and the other side surface is in contact with the protective adhesive layer to overlap, or one side surface of the overlapping colloid is in contact with the surface of the cover plate body, and the other side surface is in contact with the protective adhesive layer, thereby forming an overlapping fit.

[0029] In one embodiment of the present invention, the display module does not include a polarizing layer, that is, the display module has no polarizing layer, and the other side surface of the optical adhesive layer is directly combined and fixed to the back surface of one of the non-bent display panels of the folding screen, and the overlapping colloid is formed by extending integrally toward the opening through the optical adhesive layer.

[0030] The foldable screen in this embodiment does not require a polarizing layer. Specifically, a polarizing layer is used on LCD screens to polarize light, which in turn transmits light to create color and contrast. Generally, the transmittance of a polarizing layer is only around 43%. Therefore, the attachment of a polarizing layer affects the display efficiency of the OLED display device and increases costs. To ensure visibility in strong sunlight during daily use of mobile phones, AMOLED panels have to continue to increase their brightness, which in turn leads to increased power consumption and reduced lifespan. Current non-polarizing layer technology is to coat the traditional AMOLED package with a color filter. Each pixel is covered with a color filter corresponding to the pixel color, and the gaps between pixels are separated by a black matrix (BM). Of the incident light, the unwanted portion is absorbed by the black matrix (BM) area. The incident portion that passes through the green color filter is either reflected by the green pixel and blocked by the black matrix (BM) area during reflection, or absorbed by other color filter areas. As can be seen, in this embodiment, through the configuration without a polarizing layer, one side of the optical adhesive layer is bonded to the cover plate, and the other side surface is bonded to the back of the non-bend display panel.

[0031] It should be understood that the configuration of the non-polarizing layer in this embodiment belongs to the well-known technology, and the above-mentioned embodiment of this application is used to illustrate that this application can also be used in a display module without a polarizing layer.

[0032] In another embodiment of the present invention, the display module is also without a polarizing layer, and the other side surface of the optical adhesive layer is directly combined and fixed to the back surface of one of the non-bending display panels of the folding screen. The overlapping colloid is made of the same material as the protective adhesive layer and is combined and fixed to the protective adhesive layer. The overlapping colloid is overlapped with the cover plate in a contact manner.

[0033] In this embodiment, since the overlapping colloid and the protective adhesive layer are made of the same material, the overlapping colloid and the protective adhesive layer can be produced in the same manufacturing process. Specifically, the protective adhesive layer is formed by coating and then curing. Therefore, the overlapping colloid can be further coated and cured on the protective adhesive layer after the protective adhesive layer is cured, or the coated cured adhesive can be introduced on the protective adhesive layer through a preset mold and then cured in the same process, thereby forming an integrated protective adhesive layer and overlapping colloid, and then the overlapping colloid is overlapped on the cover plate body in a contact manner. It should be understood that the present application does not limit the manufacturing process, and the manufacturing process adopts the existing process. The description of the manufacturing process of the present application is only for better illustrating the effect of the structural setting, and is not a limitation of the structure of the present application. The implementation of the technical solution of the present application does not require any specific manufacturing process, that is, solving the technical problem of the present application can be achieved only through the structure, and has nothing to do with the process. The description of the above process is only for illustrating the form of overlap in the implementation method. It can be seen from the above implementation method that the overlap of the present application can exist in various forms, and each form has differences in the combination method, so the structure also has differences. For example, combined fixation and overlap in a contact manner, the combined fixation is inseparable during use and assembly, and if overlapped in a contact manner, it can be disassembled during use and assembly or disassembly. Therefore, although the internal components and positional relationships have not changed, the structure is also different due to the change in the overlap method.

[0034] Furthermore, the overlapping glue may be made of a different material from the protective glue layer, but both may be cured glue. The difference is that the overlapping glue is a peelable blue glue (tuffy glue), which is cured between the cover plate and the protective glue layer through the peelable blue glue. Therefore, although it is formed by a curing process, the overlapping glue is only overlapped with the cover plate and the protective glue layer in a contact manner, rather than being fixed on one side.

[0035] In one embodiment of the present invention, whether it is a solution with a polarizing layer or a solution without a polarizing layer, if the overlapping colloid is formed by an integral extension of the optical adhesive layer, then the length of the overlapping colloid along the extension direction of the optical adhesive layer is greater than 100 microns and less than 200 microns.

[0036] For example, the length of the overlapping colloid is 120 microns, 140 microns, and 180 microns, etc., and this application does not impose any restrictions on this. In this embodiment, since the overlapping colloid is connected to the optical adhesive layer and the protective adhesive layer, the length of the overlapping colloid needs to meet the spacing between the optical adhesive layer and the protective adhesive layer. Within the range of 100-200, the overlapping colloid can, on the one hand, meet the spacing between the optical adhesive layer and the protective adhesive layer, ensuring connection to the optical adhesive layer and the protective adhesive layer, and on the other hand, will not protrude beyond the orthographic projection of the cover plate body, thereby achieving the purpose of overlapping and closing the opening.

[0037] In one embodiment of the present invention, for an embodiment in which a certain gap is formed between the overlapping colloid and the optical adhesive layer, the length of the overlapping colloid along the length direction of the optical adhesive layer is greater than 0 micrometers and less than 50 micrometers.

[0038] This length range ensures the closure of the opening, thus blocking the electrostatic discharge path, while also preventing the overlapped adhesive from protruding beyond the projection range defined by the cover. Furthermore, when the length is less than 50 microns, even if the overlapped adhesive is in contact with the cover body and protective adhesive layer, the overlapped adhesive is relatively stable during repeated folding, thereby increasing its service life. In extreme cases, the overlapped adhesive may be formed as a "thin layer" of elastic adhesive, with one end fixed and the other end contacting the overlapped adhesive layer between the cover body and protective adhesive layer. This application does not impose any restrictions on this.

[0039] In one embodiment of the present invention, the overlapping adhesive has a set degree of elasticity, and the overlapping adhesive is in a compressed state when overlapping between the cover plate and the protective adhesive layer.

[0040] It should be noted that the elasticity degree of this application can be obtained using a known elasticity calculation method, that is, the length in the natural state is l1, the length in the compressed state is l2, and the elasticity degree is l2 / l1. This application does not limit this, and the calculation method is a known technology.

[0041] The overlapping colloid of the present application can have a certain degree of elasticity (of course, it can also have no elasticity in some implementation methods), and the overlapping colloid is in a compressed state. In this way, when in use, on the one hand, due to the coordination of the overlapping method, the overlapping colloid is squeezed to different degrees when the folding screen is folded and unfolded. Even in the folded state, the overlapping colloid is in a compressed state and is not easy to fall off. Since the overlapping colloid is subjected to different forces due to the height change of the protective adhesive layer in the folded and unfolded states of the folding screen, the compressible overlapping colloid further provides a certain force buffer, so that it can be used for a long time.

[0042] In one embodiment of the present aspect, along the direction from the protective adhesive layer toward the cover plate body, the height of the overlapping adhesive in the absence of external force is a first height, the gap height between the side surface of the cover plate body facing the protective adhesive layer and the protective adhesive layer is a second height, and the first height is 1.05 to 1.3 times the second height.

[0043] Specifically, the overlapping colloid is in a natural state without external force, and the height is neither stretched nor compressed. Between the cover plate body and the protective rubber layer, the overlapping colloid is in a compressed state. At this time, when the first height is 1.05 to 1.3 times the second height, under this spacing and height ratio, the overlapping colloid can be stably combined between the cover plate body and the protective rubber layer, and can also have a certain buffer. Regardless of whether the folding screen is in a folded state or an unfolded state, the overlapping colloid can be overlapped between the cover plate body and the protective rubber layer in a "micro-compressed" manner.

[0044] On the other hand, an embodiment of the present application provides a folding screen display module, including the support plate assembly as described above, and a folding screen, wherein the folding screen includes two non-bend display panels and a bent display panel connecting the two non-bend display panels, the two non-bend display panels are combined and fixed with the optical adhesive layer of the support plate assembly, and the bent display panel is combined and fixed with the protective adhesive layer.

[0045] Specifically, the folding screen display module of the present application can be applied to curved screen mobile phones, tablet computers or other portable terminal devices, and the present application does not impose any restrictions on this.

[0046] The folding screen display module of the present application includes the support plate assembly in the above-mentioned embodiment, thereby blocking the discharge path and preventing static electricity from passing through the gap to affect the bright lines of the inner screen and other inner screen electronic devices.

[0047] In another aspect, an embodiment of the present application provides an electronic device with a foldable display screen, comprising the foldable screen display module as described above, and a housing, wherein the foldable screen display module is placed in the housing.

[0048] Specifically, the electronic device of the present application may be a mobile phone with a foldable screen, a tablet computer, a portable computer or other handheld terminal, and the present application does not impose any restrictions on this. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is one of the diagrams showing defects caused by static electricity in an exemplary technology;

[0050] FIG2 is a diagram showing one of the defects caused by static electricity in the exemplary technology;

[0051] FIG3 is a diagram showing one of the defects caused by static electricity in the exemplary technology;

[0052] FIG4 is a diagram showing one of the defects caused by static electricity in the exemplary technology;

[0053] FIG5 is a schematic diagram of the structure of a support plate assembly according to an embodiment of the present application;

[0054] FIG6 is a second structural diagram of a support plate assembly provided in an embodiment of the present application;

[0055] FIG7 is a third structural diagram of a support plate assembly provided in an embodiment of the present application;

[0056] FIG8 is a fourth structural diagram of a support plate assembly provided in an embodiment of the present application;

[0057] FIG9 is a fifth structural diagram of a support plate assembly provided in an embodiment of the present application;

[0058] FIG10 is a sixth structural diagram of a support plate assembly provided in an embodiment of the present application;

[0059] FIG11 is a schematic diagram of the interior plan of a foldable display screen provided in an embodiment of the present application;

[0060] FIG12 is a schematic diagram of a foldable electronic device in an unfolded state provided in an embodiment of the present application;

[0061] FIG13 is a schematic diagram of a foldable electronic device in use according to an embodiment of the present application;

[0062] FIG14 is a schematic diagram of a foldable electronic device in a folded state according to an embodiment of the present application;

[0063] Figure numerals: 11, 12 - non-bent display panel; 21, 22 - back film, 3 - polarizing layer, 4 - optical adhesive layer, 5 - cover plate, 6 - bracket, 7 - display timing control chip, 8 - bent display panel, 9 - protective adhesive layer, 10 - overlapping colloid; 13 - middle frame, 100 - outer shell. DETAILED DESCRIPTION

[0064] To make the purpose, technical solutions and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below in conjunction with the drawings in the embodiments of this application. The following embodiments are used to illustrate this application but are not intended to limit the scope of this application.

[0065] Please refer to Figures 5 to 10. The folding screen includes two non-bending display panels (11 and 12 in the figure) and a bending display panel 8 connecting the two non-bending display panels (11 and 12 in the figure). When the user uses the folding screen, due to the dislocation of the folding layer, a certain gap will be reserved between the protective adhesive layer 9 fixed on the back of the bending display panel 8 and the optical adhesive layer 4 between the folding screen and the cover plate 5. Figure 1 shows a physical schematic diagram of the bright line on the inner screen caused by electrostatic discharge. As shown in Figure 1, electrostatic discharge will cause bright lines to appear on the inner screen. Figures 2, 3 and 4 show physical schematic diagrams of the failure position of the fanout circuit damaged by electrostatic discharge. The damage in the above figures affects the data line for display and the touch line for touch, resulting in abnormal display screen, bright lines and touch failure, affecting the user experience.

[0066] One embodiment of the present application provides a support plate assembly for a folding screen, which closes the above-mentioned electrostatic path by overlapping the cover plate 5 and the protective adhesive layer 9 using a overlapping colloid 10, thereby preventing static electricity from passing through the gap to affect the inner screen bright line and other inner screen electronic devices.

[0067] It can be understood that the present application can be used for a folding screen display module with a polarizing layer 3 , and can also be used for a folding screen display module without a polarizing layer 3 .

[0068] It should be understood that the overlap in the present application may refer to being inserted between the cover plate 5 and the protective adhesive layer 9 in a slightly compressed state, with one side surface of the overlapped colloid 10 in contact with the cover plate 5 and the other side surface in contact with the protective adhesive layer 9, but not fixed in any fixed manner, that is, the overlapped colloid 10 can be pulled out from between the cover plate 5 and the protective adhesive layer 9 by a large external force. In specific use, the overlapped colloid 10 is overlapped between the cover plate 5 and the protective adhesive layer 9, and because it is in a slightly compressed state, it is relatively stable. When the folding screen is folded, the overlapped colloid 10 is in a slightly compressed state and is not easy to fall out, but it can close the opening, thereby blocking the discharge path. When the folding screen is in the unfolded state, the protective adhesive layer 9 is squeezed by the bending display panel 8 when it is unfolded, resulting in a smaller distance between the protective adhesive layer 9 and the cover plate 5 (that is, the protective adhesive layer 9 is in a radially compressed state when the bending display panel 8 is unfolded, so the height of the protective adhesive layer 9 becomes higher), and the degree of compression of the overlapping colloid 10 becomes higher, that is, the overlapping colloid 10 is inserted between the cover plate 5 and the protective adhesive layer 9 in a "medium" compressed state.

[0069] It should be understood that the overlap in the present application may refer to being inserted between the cover plate 5 and the protective adhesive layer 9 in a slightly compressed state or an uncompressed state. One side surface of the overlapping colloid 10 is in contact with the cover plate 5, and the other side surface is in contact with the protective adhesive layer 9, but it is not fixed in any fixed manner, that is, the overlapping colloid 10 can be pulled out from between the cover plate 5 and the protective adhesive layer 9 by a large external force. In specific use, the overlapping colloid 10 is overlapped between the cover plate 5 and the protective adhesive layer 9, and because it is in a slightly compressed state, it is relatively stable. When the folding screen is folded, The overlapping colloid 10 is in a slightly compressed state and is not easy to fall out, but it can close the opening, thereby blocking the discharge path. When the folding screen is in the unfolded state, the protective rubber layer 9 is squeezed by the bending display panel 8, resulting in a smaller distance between the protective rubber layer 9 and the cover plate 5 (that is, the protective rubber layer 9 is in a radially compressed state when the bending display panel 8 is unfolded, so the height of the protective rubber layer 9 becomes higher), and the degree of compression of the overlapping colloid 10 becomes higher, that is, the overlapping colloid 10 is inserted between the cover plate 5 and the protective rubber layer 9 in a "medium" compressed state.

[0070] It should be understood that the above-mentioned "medium" compression and "micro" compression are only for the purpose of more clearly describing the changes of the overlapping colloid 10 of the present application during use. If it is explained from a quantitative perspective, in the direction of the cover plate 5 toward the protective adhesive layer 9, it is assumed that the height of the overlapping colloid 10 in the natural state when stretched out is l1. When the folding screen is folded, the height of the overlapping colloid 10 when it is overlapped between the cover plate 5 and the protective adhesive layer 9 is l2. When the folding screen is unfolded, the height of the overlapping colloid 10 when it is overlapped between the cover plate 5 and the protective adhesive layer 9 is l3. Obviously, l1 is greater than l2, and l2 is greater than l3. At this time, the compression degree can be measured by l2 / l1 and l3 / l1. However, it should be noted that the calculation of the compression degree is only for example, and the core concept of the present application is not the calculation of the compression degree. The calculation method of the compression degree can adopt any existing calculation method, and the present application does not impose any restrictions or constraints on this.

[0071] It is further necessary to understand that the overlap in the present application may also be that one side surface is connected to one of the cover plate 5 and the protective adhesive layer 9 in a fixed manner, and the other side surface is in contact with the other of the cover plate 5 and the protective adhesive layer 9 in a loose manner. In this case, the difference from the above is that the overlapping adhesive 10 cannot be pulled out from between the cover plate 5 and the protective adhesive layer 9 by a large external force, but the specific use is similar to the above.

[0072] It should be noted that the overlap of the present application can exist in various forms, and each form has differences in the combination method, so the structure is also different. For example, the combination of fixed and overlapping in a contact manner, the fixed combination is inseparable during use and assembly, and if overlapped in a contact manner, it can be disassembled during use and assembly or disassembly. Therefore, although the internal components and positional relationships have not changed, the structure is also different due to the change in the overlap method.

[0073] In the present application, generally speaking, the overlapping adhesive 10 has a set degree of elasticity (of course, it may not have elasticity in some embodiments), and the overlapping adhesive 10 is in a compressed state when overlapped between the cover plate 5 and the protective adhesive layer 9.

[0074] It should be noted that the elasticity degree of this application can be obtained using a known elasticity calculation method, that is, the length in the natural state is l1, the length in the compressed state is l2, and the elasticity degree is l2 / l1. This application does not limit this, and the calculation method is a known technology.

[0075] When the overlapping colloid 10 of the present application has a certain degree of elasticity and the overlapping colloid 10 is in a compressed state, during use, on the one hand, due to the coordination of the overlapping method, the overlapping colloid 10 is squeezed to different degrees when the folding screen is folded and unfolded. Even in the folded state, the overlapping colloid 10 is in a compressed state and is not easy to fall off. However, since the overlapping colloid 10 is subjected to different forces due to the height change of the protective adhesive layer 9 in the folded and unfolded states of the folding screen, the compressible overlapping colloid 10 further provides a certain force buffer, so that it can be used for a long time.

[0076] For ease of explanation, the overlap of b (which can refer to the overlapping colloid 10) with a (which can refer to the cover plate 5) and c (which can refer to the protective adhesive layer 9) in this application can be summarized as follows: overlap method (1), one side of b is only in contact with or under pressure contact with a (there is some mutual squeezing force in the normal direction of the contact surface), and the other side of b is only in contact with or under pressure contact with c; overlap method (2), one side of b is fixedly connected to a, and the other side of b is only in contact with or under pressure contact with c; overlap method (3), one side of b is only in contact with or under pressure contact with a, and the other side of b is fixedly connected to c. That is, the overlap defined in this application can be summarized as: at most only one side is connected in a fixedly connected manner.

[0077] The following describes the implementation of the present application in detail with reference to the accompanying drawings.

[0078] 1. There is a polarizing layer 3 and a lap joint method (1)

[0079] Figure 5 shows a structural schematic diagram of an embodiment of the present application. As shown in Figure 5, this embodiment provides a support plate assembly for a folding screen, wherein the folding screen includes two non-bending display panels (11 and 12 in the figure) and a bending display panel 8 connecting the two non-bending display panels (11 and 12 in the figure), and the back of the bending display panel 8 is surrounded by a fixed protective adhesive layer 9, and the support plate assembly includes: a cover plate 5 corresponding to one of the non-bending display panels (11 and 12 in the figure), and an opening is formed between the cover plate 5 and the protective adhesive layer 9; an optical adhesive layer 4, one side surface of the optical adhesive layer 4 is combined and fixed to the plate surface of the cover plate 5, and the other side surface is directly or indirectly combined and fixed to the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen; and a overlapping adhesive 10, the overlapping adhesive 10 is overlapped between the plate body of the cover plate 5 and the protective adhesive layer 9, and closes the opening. The overlapping colloid 10 is provided on the same layer as the optical adhesive layer 4, and a gap is left between the overlapping colloid 10 and the optical adhesive layer 4, so that the two are disconnected. Since the overlapping colloid 10 is only a small section in FIG5, it can maintain the overlapping state without being fixed to the cover plate 5, thereby forming overlapping mode (1), that is, one side of the overlapping colloid 10 is only in contact with or in pressure contact with the cover plate 5 (there is a slight mutual squeezing force in the normal direction of the contact surface), and the other side of the overlapping colloid 10 is only in contact with or in pressure contact with the protective adhesive layer 9.

[0080] It can be understood that the bent display panel 8 of the present application is formed by a flexible panel, and the non-bent display panel (11 and 12 in the figure) can be formed by a flexible panel or a non-flexible panel, and the present application does not impose any restrictions on this.

[0081] It should be noted that, in the embodiment of the present application, a display timing control chip 7 is fixed on the back of the non-bent display panel (12 in the figure) away from the cover plate 5, which will not be described in detail here.

[0082] It is further understood that the back of the display panel is a non-display surface, which is not described in detail in this application.

[0083] In the embodiment of the present application, there are generally two non-bending display panels (11 and 12 in the figure). In this case, the folding screen is a "folded" structure. The non-bending display panels (11 and 12 in the figure) may also include three. In this embodiment, another bending panel is further included. In this case, the folding screen is a "three-segment folding structure". The present application is not limited to this. It should be understood that for a multi-segment folding structure, since it must include two or more non-bending display panels (11 and 12 in the figure) and a bending display panel 8, it is still within the scope of protection of the present application.

[0084] In addition, what is not shown in the drawings of the present application is that the housing 100 of the folding screen product of the present application includes a straight housing 100 corresponding to two non-bending display panels (11 and 12 in the figure), and a foldable housing 100 corresponding to the bending panel. A hinge and a pivot structure are provided inside the housing 100, and the hinge connects the close ends of the two foldable housings 100, so that the overall structure is fixed when bent.

[0085] The support plate assembly of the present application is used to fix and support the non-bending display panel (11 and 12 in the figure) and the bending display panel 8 of the folding screen, and can support the bending display panel 8 to unfold and fold. Specifically, the support plate assembly includes a cover plate 5, the orthographic projection of the cover plate 5 covers the orthographic projection of one of the non-bending display panels (11 and 12 in the figure), and under the cover plate 5 is an optical adhesive layer 4, which can be OCA adhesive (Optically Clear Adhesive). The cover plate 5 is combined with the optical adhesive layer 4 and fixed. The optical adhesive layer 4 is directly or indirectly combined with one of the non-bending display panels (11 and 12 in the figure) and fixed. At the same time, the support plate assembly also includes a protective adhesive layer 9, which surrounds and is fixed to the bending display panel 8, so that the bending display panel 8 can be connected with the non-bending display panel (11 and 12 in the figure) when folding and unfolding.

[0086] In the embodiment of the present application, the non-bending display panels (11 and 12 in the figure) are covered with a back film (21 and 22 in the figure), and a bracket 6 is fixed on the non-display panel area. As shown in Figure 6, the bracket 6 surrounds the non-bending display panels (11 and 12 in the figure), and the thickness of the plate is higher than that of the non-bending display panels (11 and 12 in the figure). Therefore, when folded, the two non-bending display panels (11 and 12 in the figure) will not form contact due to the height limit of the bracket 6. Therefore, direct contact between the two non-bending display panels (11 and 12 in the figure) can be avoided, thereby forming pressure and causing damage to the non-bending display panels (11 and 12 in the figure).

[0087] It should be understood that, as shown in Figure 5, the protective adhesive layer 9 is coated on the back of the curved display panel 8 and extends to cover the junction of the non-curved display panel (11 and 12 in the figure) and the curved display panel 8, so that when unfolded and folded, the non-curved display panel (11 and 12 in the figure) and the curved display panel 8 always maintain a tight connection.

[0088] In addition, in the embodiment of the present application, what is not shown in the figure is that when in use, the outer side of the protective adhesive layer 9 is connected to the cover plate 5 through a hinge, and then the hinge and the above-mentioned support plate assembly are encapsulated in the shell 100. When the cover plate 5 covers the plate body, it corresponds to the folding state of the folding screen. When the cover plate 5 is opened to a flat plate shape by the hinge, it is the unfolded state of the folding screen. This application will not elaborate on this.

[0089] It can be understood that in the embodiment of the present application, the optical adhesive layer 4 is OCA adhesive, and the protective adhesive layer 9 is MCL adhesive. The MCL (Micro Coating Layer) adhesive is a protective adhesive layer 9 arranged on the curved display panel 8 of the OLED display substrate. It can be understood that the MCL adhesive has fluidity before curing. According to conventional process technology, the curved display panel 8 of the OLED display substrate is unfolded, then coated with adhesive, and finally cured to form the protective adhesive layer 9.

[0090] A polarizer is fixed to the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen, and the other side surface of the optical adhesive layer 4 is indirectly combined and fixed to the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen through the polarizer, and a gap is formed between the overlapping colloid 10 and the optical adhesive layer 4.

[0091] It can be understood that the polarizing layer 3 is located between the non-bending display panel (11 and 12 in the figure) and the optical adhesive layer 4. The polarizing layer 3 is an optical material used in folding screen devices. Its function is to control the propagation direction and vibration direction of light to achieve the purpose of improving the screen display effect.

[0092] Specifically, in this embodiment, the overlapping colloid 10 can be formed by an independent process, and a gap is formed between the overlapping colloid 10 and the optical adhesive layer 4. As an example, the overlapping colloid 10 can be prepared by using peelable blue glue (tuffy glue). Since tuffy glue is a temporary protection and can be peeled off at any time, the tuffy glue is actually in temporary contact with the cover plate 5 and the protective adhesive layer 9, rather than fixed, thereby forming the above-mentioned overlapping method (1).

[0093] In addition, in this embodiment, along the length direction of the optical adhesive layer 4 , the length of the overlapping adhesive 10 is greater than 0 micrometers and less than 50 micrometers.

[0094] This length range ensures the closure of the opening, that is, the blocking of the electrostatic discharge path, while also preventing it from extending beyond the projection range defined by the cover plate 5, thereby preventing the overlapping adhesive 10 from protruding. Furthermore, when the length is less than 50 microns, even if the overlapping connection is in contact with the cover plate 5 and the protective adhesive layer 9, the length is less than 50 microns, making it more stable during repeated folding, thereby improving its service life. In extreme cases, the overlapping adhesive 10 may be formed as a "thin layer" of elastic adhesive, with one end fixed and the other end contacting the overlapping connection between the cover plate 5 and the protective adhesive layer 9. This application does not impose any restrictions on this.

[0095] In addition, along the direction from the protective adhesive layer 9 toward the cover plate 5, the height of the overlapping adhesive 10 in the absence of external force is a first height, and the gap height between the side surface of the cover plate 5 facing the protective adhesive layer 9 and the protective adhesive layer 9 is a second height, and the first height is 1.05 to 1.3 times the second height.

[0096] Specifically, the overlapping colloid 10 is in a natural state without external force, and the height is neither stretched nor compressed. Between the cover plate 5 and the protective rubber layer 9, the overlapping colloid 10 is in a compressed state. At this time, when the first height is 1.05 to 1.3 times the second height, under this spacing and height ratio, the overlapping colloid 10 can be stably combined between the cover plate 5 and the protective rubber layer 9, and can also have a certain buffer. Regardless of whether the folding screen is in a folded state or an unfolded state, the overlapping colloid 10 can be overlapped between the cover plate 5 and the protective rubber layer 9 in a "micro-compression" manner.

[0097] It can be seen that this embodiment uses an independent overlapping colloid 10 to achieve a contact overlapping method on both sides to close the gap formed between the optical adhesive layer 4 and the polarizing layer 3, thereby blocking the discharge path and preventing static electricity from passing through the gap to affect the inner screen bright line and other inner screen electronic devices.

[0098] 2. There is a polarizing layer 3 and a lap joint method (2)

[0099] Figures 6 and 7 respectively show schematic diagrams of the folding screen structure with a polarizing layer 3 structure in an embodiment of the present application. The difference from Figure 5 is that the overlapping colloid 10 in Figures 6 and 7 can be arranged in the same layer as the optical adhesive layer 4 and fixed on the cover plate 5 (Figure 6), and in contact with the optical adhesive layer 4, or can be formed by an integral extension of the optical adhesive layer 4 (as shown in Figure 7), that is, it can be manufactured through the same process during production. In this case, the length of the overlapping colloid 10 is longer than that of the embodiment shown in Figure 5.

[0100] Specifically, in this embodiment, the structure is similar in that: the folding screen includes two non-bending display panels (11 and 12 in the figure) and a bending display panel 8 connecting the two non-bending display panels (11 and 12 in the figure), the back of the bending display panel 8 is surrounded by a fixed protective adhesive layer 9, and the support plate assembly includes: a cover plate 5 corresponding to one of the non-bending display panels (11 and 12 in the figure), and an opening is formed between the cover plate 5 and the protective adhesive layer 9; an optical adhesive layer 4, one side surface of the optical adhesive layer 4 is combined and fixed to the plate surface of the cover plate 5, and the other side surface is directly or indirectly combined and fixed to the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen.

[0101] Since the polarizing layer 3 has a certain thickness, the thickness of the opening is determined together with the thickness of the optical adhesive layer 4. In addition, due to the presence of the polarizing layer 3, there is a certain gap between the optical adhesive layer 4 and the non-bending display panel (11 and 12 in the figure). When the overlapping colloid 10 is extended through the optical adhesive layer, it will not contact the bottom area of ​​the protective adhesive layer 9, thereby forming an overlapping method (2). In this embodiment, since the optical adhesive layer 4 is combined and fixed with the cover plate 5, the extended overlapping colloid 10 is also combined and fixed with the cover plate 5. Due to the influence of the thickness of the polarizing layer 3, the other side of the overlapping colloid 10 can be overlapped on the top of the protective adhesive layer 9, thereby forming one side of the overlapping colloid 10 and the protective adhesive layer 9 only in contact or under pressure (there is some mutual squeezing force in the normal direction of the contact surface), and the other side of the overlapping colloid 10 and the cover plate 5 only in contact or under pressure. Generally speaking, the optical adhesive layer 4 can be cut or aligned to extend outward by 200 μm as a whole, and the overlap can be formed by utilizing the edge deformation of the OCA after bonding and the effect of gravity.

[0102] As shown in FIG6 , overlapping method (2) is formed. Specifically, different colloids can be used to form overlapping colloids 10. During the production, the optical adhesive layer 4 can be produced first, and then secondary coating and curing are performed to form the overlapping colloid 10. However, it should be understood that the overlapping colloid 10 formed in the present application is not tuffy glue, that is, the overlapping colloid 10 has a longer colloid length than that in the above-mentioned overlapping method (1). Therefore, the cover plate 5 needs to be fixed to the overlapping colloid 10 in a more secure manner.

[0103] As shown in FIG7 , an overlapping method (2) is formed. Specifically, a polarizer is fixed to the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen, and the other side surface of the optical adhesive layer 4 is indirectly combined and fixed to the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen through the polarizer. The overlapping colloid 10 is formed by extending integrally toward the opening through the optical adhesive layer 4.

[0104] As shown in the embodiment of Figure 7, the overlapping colloid 10 is formed by an integral extension of the optical adhesive layer 4, that is, the overlapping colloid 10 is also the optical adhesive layer 4. During the production, the overall outward extension can be achieved by cutting or alignment. Then, the edge deformation of the optical adhesive layer 4 after bonding and the effect of gravity are utilized to form a cover for the opening described in this application, thereby achieving ESD discharge path blocking while keeping the original bonding process unchanged.

[0105] It should be noted that, as shown in the embodiment of Figure 7, since the overlapping colloid 10 is formed by extending the optical adhesive layer 4 as a whole, the optical adhesive layer 4 can be directly extended by a certain distance during production, and the optical adhesive layer 4 is fixed to the cover plate 5. Therefore, at this time, one side surface of the overlapping colloid 10 is fixed to the cover plate 5, and the other side surface is overlapped on the elastic colloid, thereby closing the opening.

[0106] In the embodiments of FIG. 6 and FIG. 7 , along the extending direction of the optical adhesive layer 4 , the length of the overlapping adhesive 10 is greater than 100 microns and less than 200 microns.

[0107] For example, the length of the overlapping colloid 10 is 120 microns, 140 microns, and 180 microns, etc., and this application does not impose any restrictions on this. In this embodiment, since the overlapping colloid 10 is connected to the optical adhesive layer 4 and the protective adhesive layer 9, the length of the overlapping colloid 10 needs to meet the spacing between the optical adhesive layer 4 and the protective adhesive layer 9. Within the range of 100-200, the overlapping colloid 10 can, on the one hand, meet the spacing between the optical adhesive layer 4 and the protective adhesive layer 9, ensuring connection to the optical adhesive layer 4 and the protective adhesive layer 9, and on the other hand, will not protrude beyond the orthographic projection of the cover plate 5, thereby achieving the purpose of overlapping and closing the opening.

[0108] 3. There is a polarizing layer 3 and a lap joint method (3)

[0109] FIG8 shows a schematic diagram of a folding screen structure with a polarizing layer 3 structure in an embodiment of the present application. Similar to FIG5 , FIG6 and FIG7 , the folding screen structure of the present application includes a polarizing layer 3. That is, the overall structure of the embodiment is as follows:

[0110] The folding screen includes two non-bending display panels (11 and 12 in the figure) and a bending display panel 8 connecting the two non-bending display panels (11 and 12 in the figure), the back of the bending display panel 8 is surrounded by a fixed protective adhesive layer 9, and the support plate assembly includes: a cover plate 5, corresponding to one of the non-bending display panels (11 and 12 in the figure), and an opening is formed between the cover plate 5 and the protective adhesive layer 9; an optical adhesive layer 4, one side surface of the optical adhesive layer 4 is combined and fixed with the plate surface of the cover plate 5, and the other side surface is directly or indirectly combined and fixed with the back surface of one of the non-bending display panels (11 and 12 in the figure) of the folding screen; and a overlapping adhesive 10, the overlapping adhesive 10 is overlapped between the plate body of the cover plate 5 and the protective adhesive layer 9, and closes the opening.

[0111] The difference between this embodiment and Figures 5, 6 and 7 is that the overlapping method in this embodiment is the above-mentioned overlapping method (3), that is, the overlapping glue 10 is fixed to the protective glue layer 9 (it can be combined and fixed or it can be extended as one piece) and is in contact or pressure contact with the cover plate 5.

[0112] The overlapping glue 10 in this embodiment can be an integral extension of the protective glue layer 9 (that is, manufactured together in the same manufacturing process), or it can be a fixed structure formed separately in different manufacturing processes. That is, in this case, the overlapping glue 10 is not tuffy glue. For example, OCA glue can be used to make the overlapping glue 10, and the OCA glue is cured at the corresponding position of the protective glue layer 9 to form the overlapping glue 10, which is overlapped with the cover plate 5 in a contact manner.

[0113] It should be understood that this embodiment is further similar to the embodiment shown in FIG. 1 in that, in this embodiment, the length of the overlapping colloid 10 along the length direction of the optical adhesive layer 4 is greater than 0 micrometers and less than 50 micrometers.

[0114] This length range ensures the closure of the opening, that is, the blocking of the electrostatic discharge path, while also preventing it from extending beyond the projection range defined by the cover plate 5, thereby preventing the overlapping adhesive 10 from protruding. Furthermore, when the length is less than 50 microns, even if the overlapping connection is in contact with the cover plate 5 and the protective adhesive layer 9, the length is less than 50 microns, making it more stable during repeated folding, thereby improving its service life. In extreme cases, the overlapping adhesive 10 may be formed as a "thin layer" of elastic adhesive, with one end fixed and the other end contacting the overlapping connection between the cover plate 5 and the protective adhesive layer 9. This application does not impose any restrictions on this.

[0115] It can be seen that this embodiment realizes the above-mentioned overlapping method (3) by integrally forming the overlapping colloid 10 on the protective adhesive layer 9 or fixing the overlapping colloid 10 on the protective adhesive layer 9 to seal the gap formed between the optical adhesive layer 4 and the polarizing layer 3, thereby blocking the discharge path and preventing static electricity from passing through the gap to affect the inner screen bright line and other inner screen electronic devices.

[0116] 4. Non-polarizing layer 3 and overlapping methods (1) to (3)

[0117] Figure 9 shows one schematic diagram of a folding screen structure without a polarizing layer 3 in an embodiment of the present application, and Figure 10 shows a second schematic diagram of a folding screen structure without a polarizing layer 3 in an embodiment of the present application. As shown in Figures 9 and 10, the difference from the embodiments of Figures 5, 6 and 7 is that the folding screen structure does not have a polarizing layer 3. Therefore, one side surface of the optical adhesive layer 4 is directly combined and fixed to the back of the non-bending display panel (11 and 12 in the figure), and the other side surface is combined and fixed to one side of the cover plate 5. The above-mentioned gap is the space formed by the optical adhesive layer 4, the cover plate 5 and the back of the non-bending display panel (11 and 12 in the figure). In this embodiment, due to the presence of the non-polarizing layer 3, if the optical adhesive layer 4 is extended as a whole, the gap will be blocked, resulting in no space for the overlapping colloid 10 to extend when unfolding and folding. Therefore, this embodiment adopts a method of extending the non-optical adhesive layer 4 as a whole, that is, in the length direction along the optical adhesive layer 4, the length of the overlapping colloid 10 is greater than 0 microns and less than 50 microns.

[0118] On the one hand, this length range can ensure the closure of the opening, that is, the blocking of the electrostatic discharge path. On the other hand, it will not extend beyond the projection range limited by the cover plate 5, thereby preventing the overlapping glue 10 from protruding. At the same time, when the length is less than 50 microns, even if the overlapping method is to cooperate with the cover plate 5 and the protective glue layer 9 in a contact manner, it is relatively stable during repeated folding due to the length being less than 50 microns, thereby improving the service life.

[0119] Exemplarily, in order to achieve the above-mentioned overlapping method (1), as shown in Figure 10, in some optional embodiments, an overlapping colloid 10 can be formed by an independent process. At this time, a gap is formed between the overlapping colloid 10 and the optical adhesive layer 4. As an example, a peelable blue glue (tuffy glue) can be used to prepare the overlapping colloid 10. Since tuffy glue is a temporary protection and can be peeled off at any time, the tuffy glue is actually in temporary contact with the cover plate 5 and the protective adhesive layer 9, rather than fixed, thereby forming the above-mentioned overlapping method (1).

[0120] For example, in order to achieve the above-mentioned overlapping method (2), it can also be combined with Figure 10. In some optional embodiments, the overlapping glue 10 can be fixed on the cover plate 5 by curing, for example, it can be fixed on the cover plate 5 using OCA glue, and then overlapped with the protective glue layer 9 in a contact-only or pressure-contact manner.

[0121] Exemplarily, in order to achieve the above-mentioned overlapping method (3), as shown in Figure 9, in some optional embodiments, the protective adhesive layer 9 can be extended integrally, or the overlapping adhesive 10 can be fixed on the protective adhesive layer 9, and then overlapped with the cover plate 5 in a contact-only or pressure-contact manner.

[0122] Through the above implementation, it has been verified through actual testing that even in the worst case where the outer shell 100 is removed and the whole machine is not silver-pasted, it can still withstand ESD 10kv 200 times, and the reliability is greatly improved. The silver-pasting process and materials of the whole machine can be saved, and the cost can be saved. At the same time, the interference of the silver-pasting on the radio frequency performance is reduced, and the performance of the whole machine is improved.

[0123] Another aspect of the present application provides a folding screen display module, as shown in Figures 5 to 10, the folding screen display module includes the support plate assembly as described above, and a folding screen, the folding screen including two non-bending display panels (11 and 12 in the figure) and a bending display panel 8 connecting the two non-bending display panels (11 and 12 in the figure), the two non-bending display panels (11 and 12 in the figure) are combined and fixed with the optical adhesive layer 4 of the support plate assembly, and the bending display panel 8 is combined and fixed with the protective adhesive layer 9.

[0124] Specifically, the folding screen display module of the present application can be applied to curved screen mobile phones, tablet computers or other portable terminal devices, and the present application does not impose any restrictions on this. Furthermore, the support plate assembly of the present application can reduce the risk of signal interference and electrostatic discharge (ESD).

[0125] Figure 11 shows an internal plan schematic diagram of a foldable electronic device provided by another embodiment of the present application. As shown in Figure 11, the housing 100 of the foldable electronic device includes a foldable screen display module, the foldable screen display module includes the support plate assembly as described above, and a foldable screen, the foldable screen includes two non-bending display panels (11 and 12 in the figure) and a bending display panel 8 connecting the two non-bending display panels (11 and 12 in the figure), the two non-bending display panels (11 and 12 in the figure) are combined and fixed with the optical adhesive layer 4 of the support plate assembly, and the bending display panel 8 is combined and fixed with the protective adhesive layer 9.

[0126] In this embodiment, the electronic device may include but is not limited to mobile terminals, fixed terminals or foldable terminals with display modules, such as mobile phones, tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), driving recorders, and security equipment.

[0127] Since the electronic device of the present application includes the support plate assembly in the above-mentioned embodiment, the discharge path can be blocked to prevent static electricity from passing through the gap to affect the inner screen bright lines and other inner screen electronic devices.

[0128] Figure 12 shows the unfolded state of the foldable electronic device in the embodiment of the present application, Figure 13 shows a schematic diagram of the use state of the foldable electronic device in the embodiment of the present application, and Figure 14 shows a schematic diagram of the folded state of the foldable electronic device in the embodiment of the present application. As shown in Figures 12 to 14, the shell 100 of the foldable electronic device includes a shell 100 body and a middle frame 13. Driven by the hinge, the bent display panel 8 is unfolded and bent, thereby realizing the unfolding and folding of the folding screen.

[0129] Specific implementation methods are used in this application to illustrate the principles and implementation methods of this application. The description of the above implementation methods is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A support plate assembly for a folding screen, the folding screen comprising two non-bending display panels and a bending display panel connecting the two non-bending display panels, the back of the bending display panel is surrounded by a fixed protective adhesive layer, characterized in that: The support plate assembly comprises: A cover plate corresponding to one of the non-bending display panels, and an opening is formed between the cover plate and the protective adhesive layer; An optical adhesive layer, one side surface of which is fixedly bonded to the surface of the cover plate, and the other side surface of which is directly or indirectly fixedly bonded to the back surface of one of the non-bending display panels of the folding screen; and The overlapping colloid is overlapped between the cover plate body and the protective adhesive layer to seal the opening.

2. The support plate assembly according to claim 1, characterized in that: A polarizing plate is fixed to the back surface of one of the non-bending display panels of the folding screen, and the other side surface of the optical adhesive layer is indirectly combined and fixed to the back surface of one of the non-bending display panels of the folding screen through the polarizing plate. The overlapping colloid is formed by extending integrally toward the opening through the optical adhesive layer.

3. The support plate assembly according to claim 1, characterized in that: A polarizing plate is fixed to the back surface of one of the non-bending display panels of the folding screen, and the other side surface of the optical adhesive layer is indirectly combined and fixed to the back surface of one of the non-bending display panels of the folding screen through the polarizing plate. The overlapping colloid is formed by applying curing glue on the cover plate and then curing it, and the thickness of the overlapping colloid is the same as the thickness of the optical adhesive layer. The overlapping colloid is combined and fixed to the surface of the cover plate.

4. The support plate assembly according to claim 1, characterized in that: A polarizing plate is fixed to the back surface of one of the non-bending display panels of the folding screen, and the other side surface of the optical adhesive layer is indirectly combined and fixed to the back surface of one of the non-bending display panels of the folding screen through the polarizing plate, and a gap is formed between the overlapping colloid and the optical adhesive layer.

5. The support plate assembly according to claim 1, characterized in that: The other side surface of the optical adhesive layer is directly combined and fixed to the back surface of one of the non-bending display panels of the folding screen, and the overlapping colloid is formed by extending integrally toward the opening through the optical adhesive layer.

6. The support plate assembly according to claim 1, characterized in that: The other side surface of the optical adhesive layer is directly combined and fixed to the back surface of one of the non-bending display panels of the folding screen. The overlapping colloid is made of the same material as the protective adhesive layer and is combined and fixed to the protective adhesive layer. The overlapping colloid is overlapped with the cover plate in a contacting manner.

7. The support plate assembly according to claim 2 or 5, characterized in that: In the extending direction of the optical adhesive layer, the length of the overlapping adhesive is greater than 100 micrometers and less than 200 micrometers.

8. The support plate assembly according to claim 3, characterized in that: In the length direction of the optical adhesive layer, the length of the overlapping adhesive is greater than 0 micrometers and less than 50 micrometers.

9. The support plate assembly according to claim 1, characterized in that: The overlapping colloid has a set elasticity, and the overlapping colloid is in a compressed state when overlapping between the cover plate body and the protective adhesive layer.

10. The support plate assembly according to claim 9, characterized in that: Along the direction from the protective adhesive layer toward the cover plate body, the height of the overlapping adhesive in the absence of external force is a first height, and the gap height between the side surface of the cover plate body facing the protective adhesive layer and the protective adhesive layer is a second height, and the first height is 1.05 to 1.3 times the second height.

11. A folding screen display module, characterized in that: It comprises a support plate assembly as described in any one of claims 1 to 10, and a folding screen, wherein the folding screen comprises two non-bending display panels and a bending display panel connecting the two non-bending display panels, the two non-bending display panels are combined and fixed with the optical adhesive layer of the support plate assembly, and the bending display panel is combined and fixed with the protective adhesive layer.

12. An electronic device with a foldable display screen, characterized in that: A folding screen display module as described in claim 11, and a housing, wherein the folding screen display module is placed in the housing.

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