Flexible display module and flexible display device

Abstract

The utility model relates to a flexible display module which comprises a display panel and a supporting structure located on the backlight side of the display panel, the display panel comprises a display area and a non-display area located on the periphery of the display area, in the first direction, the non-display area comprises a first area located on one side of the display area, and in the second direction, the non-display area comprises a second area located on the other side of the display area; the first area is provided with a binding area, the supporting structure comprises a first supporting layer and a second supporting layer, at least part of the first supporting layer is attached to the first area, and at least part of the second supporting layer is attached to the display area; the transmittance of the first supporting layer is greater than that of the second supporting layer, and the bending performance of the second supporting layer is greater than that of the first supporting layer; the first supporting layer or the second supporting layer is provided with a hollow part, and the orthographic projection of the hollow part on the display panel is located in the first area.

Description

Technical Field

[0001] The present disclosure relates to the technical field of display product manufacturing, and in particular to a flexible display module and a flexible display device. Background Art

[0002] Organic Light Emitting Display (OLED) has gradually become the first choice for screens. It has many advantages such as self-luminescence, high luminous efficiency, short response time, high clarity and contrast, and can also ensure that the screen has a certain degree of flexibility and adaptability. With the development of flexible display screens, people's expectations for foldable display products are getting higher and higher.

[0003] At present, the film layer of flexible display screens usually includes cover plate, module functional film layer, luminous film layer, back plate film layer, flexible substrate, back support film and other film layer structures. The back support film is thicker than the entire PNL. Therefore, when the flexible display screen is bent, the bending recovery performance, bending strength, deformation ability, etc. of the thickest back protective film will directly affect the overall bending performance of the thinner film layer attached to it.

[0004] In order to observe the electronic circuits in the bonding area of ​​the display panel through the back support film so as to smoothly perform automatic optical inspection (AOI), the back support film needs to have a high transmittance.

[0005] However, current materials cannot meet the requirements of bending performance while also providing high transmittance. Utility Model Content

[0006] In order to solve the above technical problems, the present disclosure provides a flexible display module and a flexible display device, which solve the problem that the current back support film cannot meet the requirements of bending performance and high transmittance at the same time.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present disclosure is: a flexible display module, comprising a display panel and a support structure located on the backlight side of the display panel, wherein the display panel comprises a display area and a non-display area located outside the display area, wherein in a first direction, the non-display area comprises a first area located on one side of the display area, and a binding area is provided on the first area.

[0008] The supporting structure includes a first supporting layer and a second supporting layer, at least a portion of the first supporting layer is attached to the first region, at least a portion of the second supporting layer is attached to the display region, and a first edge of the first supporting layer close to the second supporting layer is attached to a second edge of the second supporting layer close to the first supporting layer;

[0009] The transmittance of the first supporting layer is greater than the transmittance of the second supporting layer, and the bending performance of the second supporting layer is greater than the bending performance of the first supporting layer;

[0010] A hollow portion is provided on the first supporting layer or the second supporting layer, and an orthographic projection of the hollow portion on the display panel is located in the first area.

[0011] Optionally, the first supporting layer includes a first substrate layer and a first adhesive layer, the first substrate layer is connected to the display panel via the first adhesive layer, the hollow portion is arranged on the first substrate layer, and the hollow portion passes through the first adhesive layer.

[0012] Optionally, the second supporting layer includes a second substrate layer and a second adhesive layer, the second substrate layer is connected to the display panel via the second adhesive layer, the hollow portion is arranged on the second substrate layer, and the hollow portion passes through the second adhesive layer.

[0013] Optionally, in the first direction, the hollow portion includes a first side edge arranged close to the first area, and an orthographic projection of the first side edge on the display panel is completely located inward of the first area.

[0014] Optionally, the first supporting layer includes a first substrate layer and a first adhesive layer, and the first substrate layer is connected to the display panel through the first adhesive layer;

[0015] The second supporting layer includes a second base material layer and a second adhesive layer, and the second base material layer is connected to the display panel through the second adhesive layer;

[0016] The first substrate layer and the second substrate layer are formed of different materials, the transmittance of the first substrate layer is greater than 80%, and the haze of the first substrate layer is less than 5%;

[0017] The bending performance of the second substrate layer is greater than the bending performance of the first substrate layer.

[0018] Optionally, along the first direction, the display area includes a bending area;

[0019] A portion of the first substrate layer extends to the display area, and in the first direction, the first substrate layer has a first boundary away from the first area, and an orthographic projection of the first boundary on the display panel is located in the bending area.

[0020] Optional,

[0021] In the first direction, the first substrate layer has a second boundary away from the first area, and the orthographic projection of the second boundary on the display panel coincides with the boundary between the display area and the non-display area, or the orthographic projection of the second boundary on the display panel is located in the non-display area.

[0022] Optionally, the elastic modulus of the first adhesive layer is greater than the elastic modulus of the second adhesive layer.

[0023] Optionally, the elastic modulus of the first adhesive layer is 150 Kpa-500 Kpa, and the elastic modulus of the second adhesive layer is 1 Kpa-150 Kpa.

[0024] Optionally, the first adhesive layer is UV curing adhesive.

[0025] The disclosed embodiment further provides a flexible display device, comprising the above-mentioned flexible display module.

[0026] The beneficial effect of the present disclosure is that: in the present application, the support structure located on the backlight side of the display panel is regionalized, and the support structure includes a first support layer corresponding to the first area connected to the display panel and a second support layer corresponding to the display area of ​​the display panel, and the first support layer and the second support layer are different, so that the first support layer has a higher transmittance to facilitate observation of the electronic circuits in the bonding area of ​​the display panel, so that automatic optical inspection (AOI) can be carried out smoothly, and the second support layer has good bending performance to meet the requirements of crease recovery and deformation recovery after the display area is bent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram showing a display module in an embodiment of the present disclosure;

[0028] Figure 2 A schematic diagram showing a display module in an embodiment of the present disclosure;

[0029] Figure 3 A schematic diagram showing a display panel motherboard;

[0030] Figure 4 A schematic diagram showing a display panel formed by cutting a display panel motherboard;

[0031] Figure 5 A schematic diagram showing a state in which a first region of a first adhesive material is cured by UV irradiation;

[0032] Figure 6 A schematic diagram showing the positions of cutting lines on a display panel;

[0033] Figure 7A schematic diagram showing the positions of cutting lines on a display panel;

[0034] Figure 8 A schematic diagram showing a display panel after cutting;

[0035] Fig. 9 A schematic diagram showing a second supporting layer attached to a display panel;

[0036] Fig.10 A schematic diagram showing the light-emitting side of a display module. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0038] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] Currently, the back protective film mostly uses PET as the base material, with an elastic modulus of 2-2.5Gpa, which is usually around 2Gpa, and a bending strength of around 115Mpa. Therefore, improving the resilience requires enhancing the material's ability to resist deformation and improving the resilience. At the same time, PET material is prone to cracking when the bending radius is small, and the elongation at break is as high as around 80%.

[0040] At the same time, PET substrate has certain advantages, such as high transmittance, close to 90%, and good substrate quality, extremely small Haze, basically no black spots, easy to observe AOI and the first area of ​​the line. However, with the development of folding materials, materials with high resilience and low deformation can preferably be selected from polymer materials such as polyimide or metal materials such as SUS. These materials are difficult to fully meet the requirements of AOI to clearly observe the first area and determine the indentation. Therefore, in order to permanently solve the black spot problem or the problem of difficult indentation observation caused by different PI materials or metal materials, we introduced a regional design solution. Provide technical solutions to meet the requirements of binding mark capture and indentation observation under different back film material selection in the future.

[0041] refer to Figure 1-Figure 10 This embodiment specifically provides a flexible display module, including a display panel and a support structure located on the backlight side of the display panel, wherein the display panel includes a display area 401 and a non-display area 1000 located on the periphery of the display area 401, in a first direction (reference Figure 1 and Fig.10 In the X direction in FIG. 1 , the non-display area 1000 includes a first area 402 located on one side of the display area 401, and a binding area 1002 is provided on the first area 402.

[0042] The supporting structure includes a first supporting layer and a second supporting layer, at least a portion of the first supporting layer is attached to the first region 402, at least a portion of the second supporting layer is attached to the display region 401, and a first edge of the first supporting layer close to the second supporting layer is attached to a second edge of the second supporting layer close to the first supporting layer;

[0043] The transmittance of the first supporting layer is greater than the transmittance of the second supporting layer, and the bending performance of the second supporting layer is greater than the bending performance of the first supporting layer;

[0044] A hollow portion 203 is disposed on the first supporting layer or the second supporting layer, and an orthographic projection of the hollow portion 203 on the display panel is located in the first area 402 .

[0045] In the present application, the support structure located on the backlight side of the display panel is regionalized, and the support structure includes a first support layer corresponding to the first area 402 connected to the display panel and a second support layer corresponding to the display area 401 connected to the display panel. The first support layer and the second support layer are different, so that the first support layer has a higher transmittance to facilitate observation of the electronic circuits in the bonding area of ​​the display panel, so that automatic optical inspection (AOI) can be smoothly performed, and the second support layer has good bending performance to meet the requirements of crease recovery and deformation recovery after the display area 401 is bent. That is, in this embodiment, the support structure is regionalized, so that the second support layer corresponding to the display area 401 of the display panel meets the folding requirements of the display area 401, and the second support layer corresponding to the first area 402 meets the needs of the first area 402.

[0046] In this embodiment, a hollow portion 203 is provided on the support structure, and the orthographic projection of the hollow portion 203 on the display panel is located in the first area 402 (the first area 402 includes a first sub-area 1001 located in the binding area 1002 close to the display area 401, and the orthographic projection of the hollow portion 203 on the display panel is located in the first sub-area 1001), and the orthographic projection of the hollow portion 203 on the display panel is located on a side of the binding area close to the display area 401, so that the binding area can be bent to achieve a narrow frame. In this embodiment, the support structure is regionalized. If the hollow portion 203 is provided between the first supporting layer and the second supporting layer, due to problems such as fitting errors, the setting accuracy of the hollow portion 203 is low, which will affect the folding yield of the first area 402 and affect the determination of the width of the frame. In order to improve the setting accuracy of the hollow portion 203, the hollow portion 203 is provided on the first supporting layer or the second supporting layer, Figure 1 is a schematic diagram of the hollow portion 203 being arranged on the first supporting layer, Figure 2 It is a schematic diagram showing that the hollow portion 203 is disposed on the second supporting layer.

[0047] In the manufacturing process, the supporting structure can be independently manufactured and then attached to the backlight side of the display panel, or it can be directly manufactured on the backlight side of the display panel; or one of the first supporting layer and the second supporting layer can be directly formed on the backlight side of the display panel, and the other of the first supporting layer and the second supporting layer can be bonded to the backlight side of the display panel in a bonding manner; or, both the first supporting layer and the second supporting layer can be directly formed on the backlight side of the display panel.

[0048] When the support structure is formed directly on the backlight side of the display panel, the first support layer may be formed first, and then the second support layer may be attached, or the second support layer may be formed first, and then the first support layer may be attached. The order of forming the first support layer and the second support layer is not limited. It should be noted that, in some embodiments, the first support layer is first formed on the backlight side of the display panel, and the hollow portion 203 is formed on the first support layer by laser cutting technology. In some embodiments, the second support layer is first formed on the backlight side of the display panel, and the hollow portion 203 is formed on the second support layer by laser cutting technology.

[0049] It should be noted that the hollow portion 203 may also be formed by other processes such as etching process, and is not limited to laser cutting process.

[0050] It should be noted that the second supporting layer should provide sufficient flexibility, good bending resistance and resilience (i.e., the bending performance of the second supporting layer is greater than the bending performance of the first supporting layer). Bending resistance and resilience are comprehensive properties affected by factors such as the material, microstructure and size of the substrate layer, and are difficult to define with a single physical parameter. In some embodiments, the elastic modulus and / or fracture strength of the second supporting layer may be higher than that of the first supporting layer. When the elastic modulus and / or fracture strength of the supporting layer are higher, the bending resistance and resilience are generally better.

[0051] In an exemplary embodiment, the first supporting layer includes a first substrate layer 202 and a first adhesive layer 301 , the first substrate layer 202 is connected to the display panel through the first adhesive layer 301 , the hollow portion 203 is arranged on the first substrate layer 202 , and the hollow portion 203 is arranged through the first adhesive layer 301 .

[0052] It should be noted that, in some embodiments, the hollow portion 203 does not penetrate the first adhesive layer 301, and the hollow portion 203 is only formed on the first substrate layer 202, or the hollow portion 203 is formed on the first substrate layer 202 and part of the first adhesive layer 301. The hollow portion 203 is generally formed by laser cutting, and the hollow portion 203 does not penetrate the first adhesive layer 301, thereby avoiding damage to the display panel.

[0053] In an exemplary embodiment, the second supporting layer includes a second substrate layer 201 and a second adhesive layer 303 , the second substrate layer 201 is connected to the display panel through the second adhesive layer 303 , the hollow portion 203 is arranged on the second substrate layer 201 , and the hollow portion 203 is arranged through the second adhesive layer 303 .

[0054] It should be noted that, in some embodiments, the hollow portion 203 does not penetrate the second adhesive layer 303, and the hollow portion 203 is only formed on the second substrate layer 201, or the hollow portion 203 is formed on the second substrate layer 201 and part of the second adhesive layer 303. The hollow portion 203 is generally formed by laser cutting, and the hollow portion 203 does not penetrate the second adhesive layer 303, thereby avoiding damage to the display panel.

[0055] In an exemplary embodiment, in the first direction, the hollow portion 203 includes a first side edge disposed close to the first region 402 , and an orthographic projection of the first side edge on the display panel is completely located within the first region 402 .

[0056] In an exemplary embodiment, the first supporting layer includes a first substrate layer 202 and a first adhesive layer 301, and the first substrate layer 202 is connected to the display panel through the first adhesive layer 301;

[0057] The second supporting layer includes a second substrate layer 201 and a second adhesive layer 303, and the second substrate layer 201 is connected to the display panel through the second adhesive layer 303;

[0058] The first substrate layer 202 and the second substrate layer 201 are formed of different materials, the transmittance of the first substrate layer 202 is greater than 80%, and the haze of the first substrate layer 202 is less than 5%;

[0059] The bending performance of the second substrate layer 201 is greater than the bending performance of the first substrate.

[0060] The first substrate layer 202 has good transparency and low haze, so it can be used for AOI of the first area 402 of the display panel, and can fully meet the requirements of AOI to clearly observe the first area 402 and determine the indentation. The second substrate layer 201 has good bending performance to meet the bending requirements of the display area 401.

[0061] In this embodiment, the material of the first substrate for the first area 402 is a polymer substrate with high transmittance and no black spots, preferably PET. The material of the second substrate corresponding to the display area 401 is a substrate with less deformation and excellent resilience during the folding action, preferably a polyimide material or a metal material SUS in the polymer. At the same time, the performance and formation process of the relevant materials are limited. The second substrate is a polymer substrate with the following properties: a substrate material with a modulus between 2-10Gpa, a bending strength ≥170Mpa, an elongation at break of 5%-40%, and a moisture absorption rate of 2% or less, preferably a polyimide material substrate with a modulus between 2-7Gpa, an elongation at break of 5%-30%, and a moisture absorption rate of less than 1%. When the second substrate is made of metal material, a metal material with a modulus of 150Gpa-300Gpa is used, which can withstand 100K R5 dynamic bending OK, preferably SUS that meets the characteristics. The first substrate is made of materials such as PET, which meet high transmittance (≥80%) and low Haze (≤5%). Corresponding parameters of the materials selected for the first substrate and the second substrate are shown in the table below.

[0062]

[0063] In an exemplary embodiment, along the first direction (reference Figure 1 X direction), the display area includes a bending area;

[0064] A portion of the first substrate layer 202 extends to the display area 401 , and in the first direction, the first substrate layer 202 has a first boundary away from the first area 402 , and the orthographic projection of the first boundary on the display panel is located within the bending area 200 , Figure 7 The position of the cutting line line3 in is the position of the first boundary.

[0065] The orthographic projection of the first boundary on the display panel is located within the bending area, that is, corresponding to the position of the bending area. The supporting structure is discontinuous, and the discontinuous structure can reduce stress concentration during bending and improve the bending performance of the product.

[0066] In an exemplary embodiment, in the first direction, the first substrate layer 202 has a second boundary away from the first region 402, and the orthographic projection of the second boundary on the display panel coincides with the boundary between the display area 401 and the first region 402, or the orthographic projection of the second boundary on the display panel is located within the first region 402. Figure 6 The position of the cutting line line3 is the position of the second boundary. Figure 6 The position of the middle cutting line line3 is the joint position of the first area 402 and the display area 401 .

[0067] When the orthographic projection of the second boundary on the display panel coincides with the boundary between the display area and the first area, the position of the second boundary is the boundary of the pixel area, and the second boundary cannot enter the pixel area, thereby preventing the splicing position of the first supporting layer and the second supporting layer from being in the display area and affecting the display effect.

[0068] On the basis that the first substrate layer 202 and the second substrate layer 201 are different, the first adhesive layer 302 and the second adhesive layer 303 may be the same or different. In an exemplary embodiment, the elastic modulus of the first adhesive layer 301 is greater than that of the second adhesive layer 303 .

[0069] The first adhesive layer 301 is located in the first area 402, so the bonding force thereof is required to be relatively high. Preferably, the elastic modulus of the first adhesive layer 301 is 150Kpa-500Kpa, and the elastic modulus of the second adhesive layer 303 is 1Kpa-150Kpa.

[0070] In an exemplary embodiment, the first adhesive layer 301 is UV curing adhesive.

[0071] On the one hand, the UV curing adhesive has high adhesion, which is suitable for the adhesion requirements of the first area 402. On the other hand, its adhesion is variable during the preparation process, which is suitable for the requirements of patterning the substrate layer using subtractive manufacturing. Optionally, the UV curing adhesive is a UV-cured acrylic adhesive. These UV-cured adhesives have sufficient transparency and do not hinder the AOI of the first area 402; their initial adhesion is moderate, which can both position the first substrate and be easy to remove in the subsequent elimination process; their adhesion is greatly enhanced after UV irradiation, meeting the adhesion requirements of the first area 402.

[0072] Exemplarily, the UV light energy is 2000mj / cm2-4000mj / cm2; the power is 600-800mw / cm2; a UV photosensitizer is added to the adhesive material of the first adhesive layer 301 to form a UV curing adhesive. Under UV light, the peeling force of the first adhesive layer 301 can be increased from 0.5gf / Inch to at least 400gf / Inch, and the peeling strength is measured by a 180° peeling test.

[0073] Exemplarily, the second adhesive layer 303 may be made of pressure-sensitive adhesive.

[0074] The disclosed embodiment further provides a flexible display device, comprising the above-mentioned flexible display module.

[0075] The flexible display module includes a display panel, a polarizer 50 is disposed on the light emitting side of the display panel, and a cover plate 70 is bonded to the side of the polarizer 50 away from the display panel through an optical adhesive 60. Figure 1 and Figure 2 .

[0076] The embodiment of the present disclosure also provides a method for manufacturing a flexible display module, which is used for manufacturing the above-mentioned flexible display module, wherein the first supporting layer includes a first substrate layer 202 and a first adhesive layer 301, and the first substrate layer 202 is connected to the display panel through the first adhesive layer 301;

[0077] The second supporting layer includes a second substrate layer 201 and a second adhesive layer 303, and the second substrate layer 201 is connected to the display panel through the second adhesive layer 303;

[0078] In the first direction, the first area includes a first sub-area located on a side of the binding area close to the display area, the orthographic projection of the hollow portion on the display panel is located in the first sub-area, and the first area also includes a second sub-area located outside the first sub-area;

[0079] The manufacturing method of the flexible display module comprises:

[0080] Providing a flexible display panel;

[0081] Attaching a protective film layer to the light-emitting side of the flexible display panel;

[0082] Attaching a first substrate to the backlight side of the flexible display panel by using a UV-curable first adhesive material;

[0083] The mask plate 100 is used to cure the cured area on the first adhesive material by UV irradiation, and the orthographic projection of the cured area on the display panel covers the second sub-area. Figure 6 and Figure 7 The number 302 in the figure is the part after the first adhesive material is cured. Figure 7 wherein the orthographic projection of the solidified area on the display panel covers the second sub-area and covers part of the display area (the orthographic projection of a boundary of the solidified area on the display panel is located within the bending area on the display area);

[0084] Along Figure 6 or Figure 7 Cutting line 1, line 2 and line 3 in the first support layer 201, cutting and removing the uncured first adhesive material and the first substrate on the uncured first adhesive material, forming the first support layer including the first adhesive layer 301 and the first substrate layer 202, and the area between line 1 and line 2 is the area where the hollow part is located;

[0085] Attaching a second supporting layer to an area of ​​the backlight side of the flexible display panel where the first supporting layer is not attached, so that the second supporting layer is adjacent to the first supporting layer in the first direction, and the first supporting layer and the second supporting layer are arranged in the same layer;

[0086] removing the protective film layer;

[0087] A polarizer and a cover plate are sequentially attached to the light emitting side of the flexible display panel.

[0088] It should be noted that the step of cutting and removing the uncured first adhesive material and the first substrate on the uncured first adhesive material is performed using a laser cutting process, and the laser cutting accuracy can reach 30-50um, which can improve the padbending yield.

[0089] It should be noted that the attachment of the second supporting layer can be completed by a roller lamination process.

[0090] The above solution is to first form the first supporting layer on the display panel, and then attach the second supporting layer. In some embodiments, the second supporting layer is first formed on the display panel, and then attach the first supporting layer.

[0091] In the first direction, the first area includes a first sub-area located at a side of the binding area close to the display area, and the orthographic projection of the hollow portion on the display panel is located in the first sub-area. In the first direction, the first area also includes a third sub-area located in the first sub-area close to the display area, and a fourth sub-area located in the first sub-area away from the display area. In the first direction, the fourth sub-area includes a first part and a second part adjacent to each other, and the first part is arranged with the first sub-area.

[0092] The specific process is as follows:

[0093] Providing a flexible display panel;

[0094] Attaching a protective film layer to the light-emitting side of the flexible display panel;

[0095] Attaching a second substrate to the backlight side of the flexible display panel via a second UV-curable adhesive;

[0096] The third area on the second adhesive material is cured by UV irradiation, wherein the orthographic projection of the third area on the display panel covers the display area, the third sub-area and the first portion;

[0097] Cut and remove the uncured second adhesive material and the second base material on the uncured second adhesive material to form the second supporting layer including the second adhesive layer 303 and the second base material layer 201;

[0098] attaching a first supporting layer to an area of ​​the backlight side of the flexible display panel to which the second supporting layer is not attached, wherein the orthographic projection of the first supporting layer on the flexible display panel covers the second portion, and the second supporting layer is adjacent to the first supporting layer in the first direction;

[0099] removing the protective film layer;

[0100] A polarizer and a cover plate are sequentially attached to the light emitting side of the flexible display panel.

[0101] The embodiment of the present disclosure also provides a method for manufacturing a flexible display module, which is used for manufacturing the above-mentioned flexible display module, wherein the first supporting layer includes a first substrate layer 202 and a first adhesive layer 301, and the first substrate layer 202 is connected to the display panel through the first adhesive layer 301;

[0102] The second supporting layer includes a second substrate layer 201 and a second adhesive layer 303, and the second substrate layer 201 is connected to the display panel through the second adhesive layer 303;

[0103] In the first direction, the first area includes a first sub-area located on a side of the binding area close to the display area, the orthographic projection of the hollow portion on the display panel is located in the first sub-area, and the first area also includes a second sub-area located outside the first sub-area;

[0104] The manufacturing method of the flexible display module comprises:

[0105] Provide display panel motherboard, reference Figure 3 ;

[0106] Attach a protective film layer on the light-emitting side of the display panel motherboard (reference Figure 3 , the protective film layer 10 is bonded to the light-emitting side of the display panel motherboard through the adhesive layer 00);

[0107] On the backlight side of the display panel motherboard, a UV-curable first adhesive 30 (reference Figure 3 ) attaching the first substrate 20;

[0108] Cut to form multiple display panels, refer to Figure 4 ;

[0109] The mask plate 100 is used to irradiate the plurality of display panels with UV light ( Figure 5The thick arrow in the figure represents UV light), so that the curing area of ​​the first adhesive material 30 on each display panel is cured, and the orthographic projection of the curing area on the display panel at least partially covers the first area 402 (the orthographic projection of the curing area on the display panel covers the second sub-area, refer to Figure 6 or the orthographic projection of the solidified area on the display panel covers the second sub-area and part of the display area, and the orthographic projection of a boundary of the solidified area on the display panel is located within the bending area on the display area, with reference to Figure 7 );

[0110] cutting and removing the uncured first adhesive material and the first substrate on the uncured first adhesive material to form the first supporting layer including the first adhesive layer 301 and the first substrate layer 202, Figure 8 In accordance with Figure 6 Schematic diagram after cutting the cutting lines line1, line2 and line3;

[0111] Attaching a second supporting layer to an area of ​​the backlight side of the flexible display panel where the first supporting layer is not attached, and making the second supporting layer adjacent to the first supporting layer in the first direction;

[0112] removing the protective film layer;

[0113] A polarizer and a cover plate are sequentially attached to the light emitting side of the flexible display panel.

[0114] It should be noted that the support structure can be made by directly manufacturing one of the first supporting layer and the second supporting layer on the backlight side of the display panel, and the other of the first supporting layer and the second supporting layer is bonded to the backlight side of the display panel in a bonding manner; or both the first supporting layer and the second supporting layer are bonded to the backlight side of the display panel in a bonding manner.

[0115] In an embodiment where the first supporting layer and the second supporting layer are both bonded to the backlight side of the display panel, the hollow portion may be formed before the first supporting layer and the second supporting layer are bonded to the display panel, or may be formed after the first supporting layer and the second supporting layer are bonded to the display panel.

[0116] There are a few points to note:

[0117] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0118] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be intermediate elements.

[0119] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0120] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A flexible display module, comprising a display panel and a support structure located on a backlight side of the display panel, wherein the display panel comprises a display area and a non-display area located outside the display area, wherein in a first direction, the non-display area comprises a first area located on one side of the display area, and a binding area is provided on the first area, wherein: The supporting structure includes a first supporting layer and a second supporting layer, at least a portion of the first supporting layer is attached to the first region, at least a portion of the second supporting layer is attached to the display region, and a first edge of the first supporting layer close to the second supporting layer is attached to a second edge of the second supporting layer close to the first supporting layer; The transmittance of the first supporting layer is greater than the transmittance of the second supporting layer, and the bending performance of the second supporting layer is greater than the bending performance of the first supporting layer; A hollow portion is provided on the first supporting layer or the second supporting layer, and an orthographic projection of the hollow portion on the display panel is located in the first area.

2. The flexible display module according to claim 1, characterized in that: The first supporting layer includes a first base material layer and a first adhesive layer, the first base material layer is connected to the display panel through the first adhesive layer, the hollow portion is arranged on the first base material layer, and the hollow portion passes through the first adhesive layer.

3. The flexible display module according to claim 1, characterized in that: The second supporting layer includes a second base material layer and a second adhesive layer, the second base material layer is connected to the display panel through the second adhesive layer, the hollow portion is arranged on the second base material layer, and the hollow portion passes through the second adhesive layer.

4. The flexible display module according to claim 1, characterized in that: In the first direction, the hollow portion includes a first side edge arranged close to the first area, and an orthographic projection of the first side edge on the display panel is completely located within the first area.

5. The flexible display module according to claim 1, characterized in that: The first supporting layer includes a first substrate layer and a first adhesive layer, and the first substrate layer is connected to the display panel through the first adhesive layer; The second supporting layer includes a second base material layer and a second adhesive layer, and the second base material layer is connected to the display panel through the second adhesive layer; The first substrate layer and the second substrate layer are formed of different materials, the transmittance of the first substrate layer is greater than 80%, and the haze of the first substrate layer is less than 5%; The bending performance of the second substrate layer is greater than the bending performance of the first substrate layer.

6. The flexible display module according to claim 5, characterized in that: Along the first direction, the display area includes a bending area; A portion of the first substrate layer extends to the display area, and in the first direction, the first substrate layer has a first boundary away from the first area, and an orthographic projection of the first boundary on the display panel is located in the bending area.

7. The flexible display module according to claim 5, characterized in that: In the first direction, the first substrate layer has a second boundary away from the first area, and the orthographic projection of the second boundary on the display panel coincides with the boundary between the display area and the non-display area, or the orthographic projection of the second boundary on the display panel is located in the non-display area.

8. The flexible display module according to claim 1, characterized in that: The first supporting layer includes a first base material layer and a first adhesive layer, the second supporting layer includes a second base material layer and a second adhesive layer, and the elastic modulus of the first adhesive layer is greater than the elastic modulus of the second adhesive layer.

9. The flexible display module according to claim 8, characterized in that: The elastic modulus of the first adhesive layer is 150Kpa-500Kpa, and the elastic modulus of the second adhesive layer is 1Kpa-150Kpa.

10. The flexible display module according to claim 8, characterized in that: The first adhesive layer is UV curing adhesive.

11. A flexible display device, characterized in that: The flexible display module comprises any one of claims 1 to 10.

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