Display module, display device and method for manufacturing display module

Abstract

The present application provides a display module, a display device and a method for preparing a display module. The display module includes a display panel and an ink layer. The display panel has a first part, a bending part and a second part connected in sequence, and the second part can be bent to one side of the thickness direction of the first part through the bending part. The ink layer is stacked on one side of the display panel, and the ink layer simultaneously covers at least part of the structure of the first part and at least part of the structure of the bending part. In the embodiment of the present application, the ink layer can protect the bending part by covering at least part of the structure of the first part and the bending part at the same time, thereby eliminating the need to set BPL glue on the bending part, thereby simplifying the process and providing a preparation effect. At the same time, the ink layer can be formed by printing with a micro nozzle. Compared with BPL glue, the ink layer can have a higher preparation accuracy, which can reduce the adverse effects on the process of the display module and improve the preparation yield of the display module.

Description

Technical Field

[0001] The present application relates to the technical field of display equipment, and in particular to a display module, a display device, and a method for preparing the display module. Background Art

[0002] With the development of science and technology, display devices have also developed accordingly, and people have higher and higher requirements for display devices. Narrow-frame display devices have received widespread attention due to their large screen-to-body ratio. However, existing narrow-frame display devices still have problems such as low manufacturing yield. Summary of the invention

[0003] The embodiments of the present application provide a display module, a display device, and a method for manufacturing a display module, which can improve the manufacturing yield.

[0004] In a first aspect, an embodiment of the present application provides a display module, including a display panel and an ink layer, wherein the display panel has a first part, a bending part, and a second part connected in sequence, and the second part can be bent to one side of the first part in the thickness direction through the bending part.

[0005] The ink layer is stacked on one side of the display panel, and the ink layer covers at least a portion of the structure of the first portion and at least a portion of the structure of the bending portion.

[0006] In a second aspect, an embodiment of the present application provides a method for preparing a display module, comprising:

[0007] Providing an initial substrate, the initial substrate having a first area, a third area and a second area sequentially arranged side by side in a first direction;

[0008] forming an ink layer on the initial substrate at positions corresponding to the first area and the third area;

[0009] forming a polarizing layer on a side of the ink layer away from the initial substrate and corresponding to the position of the first area;

[0010] A first support portion is formed at a first area on a side of the initial substrate away from the ink layer, the first support portion has a first edge on a side in the first direction and close to the third area, the polarizing layer has a second edge on a side in the first direction and close to the third area, and a distance between the first edge and the second edge in the first direction is D, and D satisfies: D≤0.3 mm;

[0011] The driving chip is welded to the second area of ​​the initial substrate.

[0012] The embodiment of the present application provides a display module, a display device and a method for manufacturing a display module. By simultaneously covering the first portion and at least part of the structure of the bending portion with an ink layer, the ink layer can protect the bending portion, thereby eliminating the need to set BPL glue on the bending portion, thereby simplifying the process and improving the manufacturing effect. At the same time, the ink layer can be formed by printing with a micro nozzle. Compared with BPL glue, the ink layer can have a higher manufacturing accuracy. While ensuring the protection of the bending portion, it can reduce the adverse effects on the manufacturing process of the display module and improve the manufacturing yield of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 It is a schematic diagram of a cross-sectional structure of a display module in a flattened state in the related art;

[0015] Figure 2 is a schematic diagram of a cross-sectional structure of a display module in a flattened state provided in an embodiment of the present application;

[0016] Figure 3 is a schematic diagram of a cross-sectional structure of a display module in a bent state provided by an embodiment of the present application;

[0017] Figure 4 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0018] Figure 5 is a schematic diagram of a cross-sectional structure of another display module in a bent state provided by an embodiment of the present application;

[0019] Figure 6 is a schematic diagram of a cross-sectional structure of another display module in a bent state provided by an embodiment of the present application;

[0020] Figure 7 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0021] Figure 8 yes Figure 7 A partial enlarged schematic diagram of the middle region Q;

[0022] Fig. 9 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0023] Fig.10is a schematic diagram of the positional relationship between a display panel and an optical functional layer in another display module provided in an embodiment of the present application;

[0024] Fig.11 is a schematic diagram showing the positional relationship between a display module and a sacrificial part provided in another embodiment of the present application;

[0025] Fig.12 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0026] Fig.13 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0027] Fig.14 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0028] Fig.15 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0029] Fig.16 It is a schematic diagram of the positional relationship between the ink material and the bending portion when preparing the ink layer in another display module provided by an embodiment of the present application;

[0030] Fig.17 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0031] Fig.18 It is a schematic diagram of the positional relationship between the ink material and the bending portion when preparing the ink layer in another display module provided by an embodiment of the present application;

[0032] Fig.19 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0033] Fig. 20 is a schematic diagram of a cross-sectional structure of another display module in a bent state provided by an embodiment of the present application;

[0034] Fig.21 is a schematic diagram of the positional relationship between a display panel and an ink layer in another display module provided in an embodiment of the present application;

[0035] Fig. 22 is a schematic diagram of the positional relationship between a display panel and an ink layer in another display module provided in an embodiment of the present application;

[0036] Fig.23 is a schematic cross-sectional structure diagram of another display module in a flattened state provided in an embodiment of the present application;

[0037] Fig.24 is a schematic diagram of the positional relationship between a display panel and an ink layer in another display module provided in an embodiment of the present application;

[0038] Fig.25 is a structural schematic diagram of a display device provided in an embodiment of the present application;

[0039] Fig.26 is a flow chart of a method for preparing a display module provided in an embodiment of the present application;

[0040] Figures 27a to 27e It is a process structure schematic diagram of a method for preparing a display module provided in an embodiment of the present application;

[0041] Fig.28 It is a flow chart of a method for preparing a display module in the related art.

[0042] Marking Description:

[0043] 10. display panel; 11. first part; 12. second part; 13. bending part;

[0044] 20, ink layer; 21, first ink portion; 22, second ink portion; 221, first sub-portion; 222, hollow portion; 223, groove structure; 23, third ink portion;

[0045] 30. Polarizing layer;

[0046] 40. Support layer; 41. First support portion; 42. Second support portion;

[0047] 50, optical functional layer; 51, first optical part; 511, limiting channel; 52, second optical part;

[0048] 60. Sacrificial part; 61. Sacrificial channel;

[0049] 70. BPL glue;

[0050] 10', initial substrate; 11', first zone; 12', second zone; 13', third zone;

[0051] IC, driver chip;

[0052] E1, first edge; E2, second edge;

[0053] M1, first side;

[0054] X, first direction; Y, second direction; Z, thickness direction. DETAILED DESCRIPTION

[0055] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0057] During the preparation of the display device, part of the structure in the display panel is usually arranged on the backlight side of the display device by bending or the like, thereby reducing the occupancy of the part of the structure in the display device screen ratio to achieve a narrow frame effect.

[0058] In related technologies, such as Figure 1 As shown, a BPL glue 70 (bending protection layer) is provided on the part of the display panel where the bending occurs, so as to reduce the bending stress. However, the applicant has found that the amount of BPL glue 70 and the position accuracy will affect the sealing effect. For example, when the BPL glue 70 is less, it cannot play a good protective role, and the display panel is prone to cracks during the bending process, which has an adverse effect on the use of the display device. When the BPL glue 70 is more, there is a risk that the BPL glue 70 will climb up and cover other film layers, which will have an adverse effect on subsequent processes.

[0059] Regarding the above issues, please refer to Figure 2 and Figure 3An embodiment of the present application provides a display module, including a display panel 10 and an ink layer 20, wherein the display panel 10 has a first portion 11, a bending portion 13, and a second portion 12 connected in sequence, and the second portion 12 can be bent to one side of the first portion 11 in the thickness direction Z through the bending portion 13.

[0060] The ink layer 20 is stacked on one side of the display panel 10 , and the ink layer 20 covers at least a portion of the structure of the first portion 11 and at least a portion of the structure of the bending portion 13 .

[0061] The display panel 10 is the most important part of the display module, and the display panel 10 generally includes multiple film layers stacked, and the present application does not limit the film layer structure inside the display panel 10. Exemplarily, the display panel 10 includes an array layer, a light-emitting layer, and an encapsulation layer stacked.

[0062] The display panel 10 includes a first portion 11, a bent portion 13, and a second portion 12 arranged in sequence. The display module includes at least two states: a flat state and a bent state. Figure 1 This is a schematic diagram showing the structure of the module in a flattened state. Figure 2 Schematic diagram of the structure of the display module in a bent state. When the display module is transformed from a flat state to a bent state, the second part 12 in the display panel 10 passes through the bent portion 13 to one side of the first part 11 in the thickness direction Z, that is, in the bent state, the first part 11 and the second part 12 are arranged side by side in the thickness direction Z.

[0063] The first part 11 is provided with a partial structure for providing a display effect for the display panel 10. In the bent state, the side of the first part 11 away from the second part 12 is the light emitting surface of the first part 11, which is used to display a specific picture or video to the user.

[0064] The second part 12 is connected to the first part 11 through the bending part 13. For example, control elements such as a driver chip IC can be arranged on the second part 12. The driver chip IC includes various types, such as a display driver chip IC and a control driver chip IC. The display driver chip IC is used to store image data, generate a driving voltage, and can also improve image quality through customized algorithms. The touch driver chip IC mainly realizes touch signal processing and is a necessary component of a display device with a touch function. Of course, the display driver chip IC and the touch driver chip IC can be integrated and arranged on the second part 12 at the same time.

[0065] The ink layer 20 is stacked on one side of the display panel 10, that is, in the flattened state, the ink layer 20 is located on one side of the display panel 10 in the thickness direction Z. The ink layer 20 covers at least part of the structure of the first portion 11, that is, the ink layer 20 may only cover part of the structure in the first portion 11, or the ink layer 20 may also cover the entire structure in the first portion 11. Similarly, the ink layer 20 covers at least part of the structure of the bending portion 13, that is, the ink layer 20 may only cover part of the structure in the bending portion 13, or the ink layer 20 may also cover the entire structure in the bending portion 13.

[0066] In the related art, the ink layer 20 is usually only provided on the first portion 11, that is, the ink layer 20 is usually not provided on the bending portion 13. However, in the embodiment of the present application, the ink layer 20 is extended from the first portion 11 to the bending portion 13, so that the ink layer 20 covers at least part of the structure of the first portion 11 and the bending portion 13 at the same time. In the process of converting from the unfolded state to the bent state, the ink layer 20 located on the bending portion 13 can protect the bending portion 13. This design of the ink layer 20 can replace the BPL glue and reduce the risk of cracks in the display panel 10, thereby eliminating the need to provide the BPL glue on the bending portion 13.

[0067] In summary, the embodiment of the present application covers at least part of the structure of the first portion 11 and the bending portion 13 with the ink layer 20, so that the ink layer 20 can protect the bending portion 13, thereby eliminating the need to set BPL glue on the bending portion 13, thereby simplifying the process and improving the manufacturing effect. At the same time, the ink layer 20 can be formed by printing with a micro nozzle, and compared with the BPL glue, the ink layer 20 can have a higher manufacturing accuracy, while ensuring the protection of the bending portion 13, it can reduce the adverse effects on the manufacturing process of the display module and improve the manufacturing yield of the display module.

[0068] In addition, under normal circumstances, the thickness of the BPL glue will also affect the frame size of the display module in the bent state, causing the frame size to increase. However, in the embodiment of the present application, the ink layer 20 is used to replace the BPL glue at the corresponding position of the bent portion 13, wherein the thickness of the ink layer 20 is usually less than the thickness of the BPL glue, which can reduce the frame size of the display module in the bent state to a certain extent, thereby improving the display effect.

[0069] Specifically, the structure used to cover and protect the bending portion 13 needs to meet certain modulus requirements to meet the needs of bending protection. The modulus of the BPL glue itself can meet the bending needs, so in the related art, BPL glue is set on the bending portion 13, so that it can play a role in protecting the bending portion 13 during the bending process. In the embodiment of the present application, the modulus of the ink layer 20 itself is usually greater than that of the BPL glue, so the ink layer 20 can be used to replace the BPL glue, and compared with the BPL glue, the ink layer 20 requires a smaller thickness to meet the protection of the bending portion 13, thereby reducing the frame size of the display module in the bent state.

[0070] It should be noted that the present application does not limit the light emitting mode of the display panel 10. For example, the display panel 10 can achieve the display effect by driving the liquid crystal to deflect, or the display panel 10 can achieve the display effect by emitting light from an organic light emitting element.

[0071] In some embodiments, see Figure 4 and Figure 5 The display module further includes a polarizing layer 30 disposed on one side of the first portion 11 in the thickness direction Z. The polarizing layer 30 is located on a side of the ink layer 20 away from the display panel 10.

[0072] The polarizing layer 30 is used to control the passage of light vibrating in a specific direction, so as to reduce the influence of reflected light on the display effect, or for the liquid crystal display panel 10, it can control the light emitted by the display panel 10 to selectively pass through to display a specific picture.

[0073] In the flat state, the polarizing layer 30 and the ink layer 20 are located on the same side of the first portion 11, and in the bent state, the polarizing layer 30 and a portion of the structure in the ink layer 20 are located on the side of the first portion 11 away from the second portion 12. Further, the polarizing layer 30 is located on the side of the ink layer 20 away from the display panel 10, and both are at least partially located on the first portion 11.

[0074] In the related art, the BPL glue and the polarizing layer 30 are at least partially arranged in the same layer, and the two are adjacent to each other in relative position, the polarizing layer 30 is located on the first portion 11, and the BPL glue is located on the bent portion 13. In the preparation process of the BPL glue, BPL droplets are usually sprayed out through the nozzle of the glue valve. On the side close to the polarizing layer 30, the BPL droplets will be adsorbed in the polarizing layer 30 due to the capillary absorption phenomenon, and climb up the side of the polarizing layer 30 away from the display panel 10, thereby affecting the use effect of the polarizing layer 30 and easily having an adverse effect on the subsequent process.

[0075] In the preparation process of the embodiment of the present application, the ink layer 20 needs to be formed first, and then the polarizing layer 30 is formed on the side of the ink layer 20 away from the display panel 10. The probability of the material in the ink layer 20 transferring to the side of the polarizing layer 30 away from the display panel 10 is low, so the existence of the ink layer 20 has little effect on the polarizing layer 30, and will not have an adverse effect on the subsequent process, which helps to improve the production yield of the display module.

[0076] In some embodiments, Figure 4 and Figure 5 As shown, the display module further includes a support layer 40, and the support layer 40 includes a first support portion 41, and the first support portion 41 is disposed on a side of the first portion 11 away from the ink layer 20. The bending portion 13 is located on one side of the first portion 11 in the first direction X, and the first support portion 41 has a first edge E1 on a side in the first direction X and close to the bending portion 13, and the polarizing layer 30 has a second edge E2 on a side in the first direction X and close to the bending portion 13. The distance between the first edge E1 and the second edge E2 in the first direction X is D, and D satisfies: D≤0.3mm.

[0077] In the flattened state, the support layer 40 and the ink layer 20 are disposed on different sides of the display panel 10, and the first support portion 41 in the support layer 40 is disposed on the first portion 11 to support the first portion 11. It should be noted that the support layer 40 may also include a second support portion 42, which is disposed on the second portion 12 to support the second portion 12. In the bent state, the first support portion 41 and the second support portion 42 are located between the first portion 11 and the second portion 12 at the same time.

[0078] In the flattened state, the first portion 11, the bent portion 13 and the second portion 12 are sequentially arranged in the first direction X. The first support portion 41 has two opposite edges in the first direction X, and the first edge E1 is the edge relatively close to the bent portion 13 of the two edges. Similarly, the polarizing layer 30 has two opposite edges in the first direction X, and the second edge E2 is the edge relatively close to the bent portion 13 of the two edges.

[0079] Typically, the first edge E1 usually corresponds to the junction between the first portion 11 and the bent portion 13 , that is, in the flattened state, the orthographic projection of the first edge E1 on the display panel 10 overlaps or is close to the junction between the first portion 11 and the bent portion 13 .

[0080] In the related art, due to the presence of BPL glue, the second edge E2 needs to have a certain distance from the junction of the first part 11 and the bending part 13, that is, the second edge E2 needs to have a certain distance from the first edge E1 in the first direction X, so as to meet the detection requirements of the detection equipment for detecting BPL glue.

[0081] Specifically, the detection device usually measures the optical path difference to achieve thickness detection, and the detection incident light usually has a certain angle. In the related art, the preparation of the BPL glue is located after the preparation of the polarizing layer 30, and the BPL glue is at least partially arranged in the same layer as the polarizing layer 30. Combined with the above content, the presence of the polarizing layer 30 will block part of the detection light, so the limit of the device's detection ability is usually where the second edge E2 is outside 0.3mm.

[0082] Furthermore, if the distance between the first edge E1 and the second edge E2 is compressed to 0.3 mm, the opening in the support layer 40 corresponding to the bending portion 13 will affect the detected BPL glue thickness, so that the obtained BPL glue thickness is not accurate, which will lead to uneven thickness of the prepared BPL glue. Uneven thickness will easily cause cracks during the bending process, which is not conducive to the preparation yield of the display module.

[0083] In the embodiment of the present application, since the ink layer 20 extends to the bending portion 13, the BPL glue on the bending portion 13 can be eliminated, and the ink layer 20 is prepared before the polarizing layer 30. Even if the thickness of the ink layer 20 is tested, the polarizing layer 30 will not affect the test result, so there is no need to set a large distance between the first edge E1 and the second edge E2 in the first direction X, and the distance D between the first edge E1 and the second edge E2 in the first direction X can be set to no more than 0.3 mm. Exemplarily, D can be one of 0 mm, 0.1 mm, 0.15 mm, 0.2 mm and 0.3 mm.

[0084] Furthermore, the polarizing layer 30 generally covers and exceeds the area of ​​the display panel 10 where the display effect can be achieved. Figure 5 The symbol K in the figure indicates the relative position of the frame area when the display module is in the bent state, and the size of the frame area in the first direction X includes the distance between the first edge E1 and the second edge E2 in the first direction X. At this time, if the distance between the first edge E1 and the second edge E2 in the first direction X is too large, the size of the frame area in the first direction X will be too large, so that the screen-to-body ratio of the display module is reduced, which is not conducive to the final display effect.

[0085] Therefore, in the embodiment of the present application, by setting the distance D between the first edge E1 and the second edge E2 in the first direction X to be no greater than 3 μm, the final display module product can have a larger screen-to-body ratio to improve the display effect and meet the needs of a narrow frame.

[0086] In addition, from Figure 5As can be seen from the figure, since the display module is in a bent state, the thickness of the ink layer 20 itself will also affect the size of the frame area in the first direction X. On this basis, since the thickness of the ink layer 20 is usually less than the thickness of the BPL glue, the size of the frame area in the first direction X can be further reduced to meet the needs of a narrow frame.

[0087] In some embodiments, see Figure 6 , the projections of the first edge E1 and the second edge E2 in the thickness direction Z overlap, that is, the distance D between the first edge E1 and the second edge E2 in the first direction X is equal to 0. In this way, the screen-to-body ratio in the final display module product can be further improved, thereby improving the display effect and meeting the needs of a narrow frame.

[0088] It should be noted that the material in the polarizing layer 30 is usually a hard material. If the film layer where the polarizing layer 30 is located is relatively rugged, it is easy to cause cracks in the polarizing layer 30. In the embodiment of the present application, since the ink layer 20 needs to extend from the first portion 11 to the bending portion 13, the extension path of the ink layer 20 can cover most of the area where the polarizing layer 30 is located, thereby ensuring that the film layer structure where the polarizing layer 30 is located is relatively flat, which helps to improve the preparation yield of the polarizing layer 30 and improve the accuracy of the relative position of the first edge E1.

[0089] In some embodiments, see Figure 7 The display module further includes an optical function layer 50 disposed between the display panel 10 and the ink layer 20, and the refractive index of the ink layer 20 is higher than the refractive index of the optical function layer 50. The optical function layer 50 covers at least part of the structure of the first portion 11, and in the thickness direction Z, there is no overlapping area between the projection of the optical function layer 50 and the projection of the bending portion 13.

[0090] The optical function layer 50 may be disposed only corresponding to the first portion 11 , that is, the projection of the optical function layer 50 in the thickness direction Z is located within the projection of the first portion 11 in the thickness direction Z.

[0091] It should be noted that when the optical functional layer 50 is only set corresponding to the first part 11, the projection of the optical functional layer 50 in the thickness direction Z can be in contact with the projection of the bending portion 13 in the thickness direction Z, or the projection of the optical functional layer 50 in the thickness direction Z can also be spaced apart from the projection of the bending portion 13 in the thickness direction Z, and the embodiments of the present application do not impose any restrictions on this.

[0092] Both the optical functional layer 50 and the ink layer 20 can adjust the light emitted by the display panel 10 to improve the display effect. The refractive index of the optical functional layer 50 and the ink layer 20 is different. The ink layer 20 is a high refractive index layer, and the optical functional layer 50 is a low refractive index layer. The optical functional layer 50 and the ink layer 20 can be arranged in contact with each other, that is, there is no other film layer between the two; or the optical functional layer 50 and the ink layer 20 can be arranged at intervals, that is, there is another film layer between the two. For the convenience of description, the embodiments of the present application are described below by taking the optical functional layer 50 and the ink layer 20 as an example of being arranged in contact with each other.

[0093] In the thickness direction Z, there is no overlapping area between the projection of the optical functional layer 50 and the projection of the bending portion 13, that is, the optical functional layer 50 is not arranged on the bending portion 13, the optical functional layer 50 can be arranged only on the first portion 11, or the optical functional layer 50 can also be arranged on the first portion 11 and the second portion 12 at the same time.

[0094] Since the modulus of the low refractive index material in the optical functional layer 50 and the high refractive index material in the ink layer 20 is different, if the optical functional layer 50 and the ink layer 20 are provided on the bending portion 13 at the same time, it will lead to differences or mismatches in bending performance, thereby failing to protect the bending portion 13 and relieve bending stress, and problems such as separation of adjacent film layers may easily occur.

[0095] Therefore, in the embodiment of the present application, only a partial structure of the ink layer 20 is provided on the bending portion 13, but no optical functional layer 50 is provided, that is, the bending portion 13 is protected only by the ink layer 20. In this way, the modulus difference caused by materials with different refractive indices can be reduced, thereby improving the protection effect of the bending portion 13 and improving the manufacturing yield rate of the display module.

[0096] It should be noted that the ink layer 20 in the embodiment of the present application can be used as a high refractive index layer in the MLP (Micro Lens Panel) technology to improve the display effect. Figure 8 In the embodiment of the present application, by simultaneously arranging the low refractive index material in the optical functional layer 50 and the high refractive index material in the ink layer 20 on the first part 11, the light emitted by the first part 11 is directly refracted and reflected at the interface between the optical functional layer 50 and the ink layer 20, thereby adjusting the propagation path of the light and achieving the focusing of the light, thereby improving the display brightness and display effect.

[0097] In addition, the high-refractive material in the ink layer 20 and the low-refractive material in the optical functional layer 50 can form a visual contrast, so that the edge position of some structures in the optical functional layer 50 can be clearly seen near the edge of the bending portion 13, which is conducive to reducing the difficulty of preparation.

[0098] In some embodiments, see Fig. 9 and Fig.10 The ink layer 20 extends to the second portion 12 , the optical functional layer 50 includes a first optical portion 51 disposed in the second portion 12 , the first optical portion 51 is recessed inwardly on a side away from the second portion 12 to form a limiting channel 511 , and the ink layer 20 terminates at the limiting channel 511 .

[0099] The ink layer 20 extends from the first portion 11 to the second portion 12 via the bending portion 13, that is, in the flattened state, the ink layer 20 completely covers the bending portion 13 in the first direction X. The optical function layer 50 covers at least part of the structure of the first portion 11 and the second portion 12 at the same time, and the optical function layer 50 includes a first optical portion 51 located on the second portion 12, and a second optical portion 52 located on the first portion 11. In the flattened state, the first optical portion 51 and the second optical portion 52 are spaced apart, and the minimum distance between the two in the first direction X is not less than the size of the bending portion 13 in the first direction X.

[0100] In addition, in the embodiment of the present application, a limiting groove 511 is further provided on the side of the first optical portion 51 away from the second portion 12, and the limiting groove 511 extends along the second direction Y, and the first direction X intersects with the second direction Y. Exemplarily, the first direction X is perpendicular to the second direction Y. The limiting groove 511 is used to limit the edge position of the ink layer 20 in the first direction X. Specifically, since the optical function layer 50 is located between the ink layer 20 and the display panel 10, during preparation, the optical function layer 50 is first prepared and then the ink layer 20 is prepared.

[0101] The ink material used to form the ink layer 20 is usually fluid. During the preparation of the ink layer 20, the ink material will flow. At this time, due to the presence of the limiting channel 511, the limiting channel 511 can prevent the ink material from continuing to flow along the first direction X to the side away from the first part 11, so that the ink layer 20 can be terminated in the limiting channel 511. The risk of the ink layer 20 extending to the position of the driver chip IC in the second part 12 is reduced, and the reliability of the display module is improved.

[0102] Please note that Fig.11During the preparation process, a sacrificial portion 60 may be additionally provided on the outside of the display module. The sacrificial portion 60 may be connected to at least one side of the first optical portion 51 in the second direction Y. A sacrificial channel 61 may be provided on the sacrificial portion 60. The number of sacrificial channels 61 may be one or more. Some sacrificial channels 61 may be connected to the limiting channel 511, or any sacrificial channel 61 may be separated from the limiting channel 511. During the preparation process of the ink layer 20, part of the ink material may flow into the limiting channel 511 and the sacrificial channel 61 to limit the ink layer 20. At the same time, when the preparation of the ink layer 20 is completed, the sacrificial portion 60 and the sacrificial channel 61 on the sacrificial portion 60 may be cut and separated from the display module to transfer excess ink material from the display module.

[0103] In some embodiments, see Fig.12 The bending portion 13 is located on one side of the first portion 11 along the first direction X, the optical function layer 50 includes a first optical portion 51 arranged on the second portion 12, and in the first direction X, the ink layer 20 terminates at one end of the first optical portion 51 close to the bending portion 13.

[0104] The optical function layer 50 includes a first optical portion 51 located on the second portion 12 and a second optical portion 52 located on the first portion 11, and the first optical portion 51 and the second optical portion 52 are spaced apart in the first direction X. On this basis, one end of the first optical portion 51 close to the bending portion 13 in the first direction X is the edge of the first optical portion 51 facing the second optical portion 52.

[0105] The ink layer 20 ends at one end of the first optical portion 51 close to the bending portion 13. In other words, the end position of the ink layer 20 is the starting position of the first optical portion 51. In the embodiment of the present application, by setting the first optical portion 51 and the second optical portion 52 at intervals, the edge of the first optical portion 51 facing the second optical portion 52 can be used to limit the ink layer 20, thereby reducing the probability of the ink material contacting the components such as the driver chip IC on the second portion 12, and improving the reliability of the display module.

[0106] In some embodiments, see Fig.13 The ink layer 20 includes a first ink portion 21 disposed on the first portion 11, and a second ink portion 22 disposed on the bending portion 13, and the average thickness of the second ink portion 22 is less than the average thickness of the first ink portion 21. The thickness mentioned in the embodiment of the present application refers to: the dimension in the thickness direction Z in the flattened state.

[0107] The first ink section 21 is disposed on the first portion 11, and the thickness of different positions in the first ink section 21 may be the same or different. The average thickness of the first ink section 21 may be the total volume of the first ink section 21 divided by the projection area of ​​the first ink section 21 in the thickness direction Z in a flattened state. The second ink section 22 is disposed on the bent portion 13, and the thickness of different positions in the second ink section 22 may be the same or different. The average thickness of the second ink section 22 may be the total volume of the second ink section 22 divided by the projection area of ​​the second ink section 22 in the thickness direction Z in a flattened state.

[0108] Generally, the thicker the thickness, the higher the structural strength, and the greater the stress required to be provided during bending. On this basis, the embodiment of the present application appropriately reduces the average thickness of the second ink portion 22 to be less than the average thickness of the first ink portion 21, so that in the process of converting the display module from the flat state to the bent state, the bending stress can be appropriately reduced, thereby reducing the bending difficulty of the display module. At the same time, due to the presence of the second ink portion 22, the bending portion 13 can be protected during the bending process, thereby reducing the occurrence of cracks in the bending portion 13 and other problems.

[0109] It should be noted that, in other embodiments, the ink layer 20 further includes a third ink portion 23 disposed on the second portion 12 , and the average thickness of the second ink portion 22 is smaller than the average thickness of the third ink portion 23 to reduce the difficulty of bending the display module.

[0110] In some embodiments, see Fig.14 and Fig.15 In the direction from the first portion 11 to the second portion 12, the thickness of the second ink portion 22 first tends to gradually decrease, and then tends to gradually increase.

[0111] It should be noted that the thickness variation trend of the second ink portion 22 mentioned here refers to the thickness variation trend of the second ink portion 22 at different positions in the first direction X when the display module is flattened. The thickness of the second ink portion 22 at different positions is not completely the same, and the thickness of the second ink portion 22 at the position close to the first portion 11 and the position close to the second portion 12 is greater than the thickness of the second ink portion 22 at the central position in the first direction X.

[0112] The thickness of the second ink portion 22 may vary in a gradient manner, that is, in the direction from the first portion 11 to the second portion 12, the surface of the second ink portion 22 away from the bending portion 13 may have a stepped structure; or the thickness of the second ink portion 22 may vary linearly, that is, in the direction from the first portion 11 to the second portion 12, the surface of the second ink portion 22 away from the bending portion 13 may be two intersecting planar structures, or the thickness of the second ink portion 22 may vary exponentially, etc., and the embodiments of the present application do not impose any restrictions on this.

[0113] When the display module is transformed from a flat state to a bent state, the central position of the bending portion 13 and the second ink portion 22 in the first direction X is usually the bending starting point. Therefore, the embodiment of the present application sets the second ink portion 22 to be thick on both sides and thin in the middle in the first direction X, so that the bending starting point is easier to bend, thereby reducing the difficulty of bending.

[0114] It should be noted that the ink material used to form the ink layer 20 is usually fluid, so in the process of forming the ink layer 20, the ink material can be dropped at a specific position by a micro-nozzle printing method to adjust the thickness of the ink layer 20 at different positions. Fig.16 For example, when preparing the second ink portion 22, the number of dripping rows of the ink material in the first direction X can be controlled by a micro nozzle, so that more rows of ink material can be dripped near the edge position of the bending portion 13 in the first direction X relative to the starting position when the bending occurs, and then the ink materials flow and merge with each other, so that the thickness of the second ink portion 22 formed at the central position in the first direction X is the smallest, and the thickness near the edge positions on both sides tends to gradually increase.

[0115] In addition, in the related art, the thickness difference of the BPL glue used to protect the bending portion 13 at different positions is usually large, so cracks and other problems are prone to occur during the bending process. In the embodiment of the present application, although the thickness of the second ink portion 22 at different positions is different, since the thickness of the ink layer 20 itself is small, the thickness difference at different positions of the second ink portion 22 is usually small, and the risk of bending cracks caused by uneven thickness of the second ink portion 22 is also small, so that the second ink portion 22 can ensure the protective effect of the bending portion 13.

[0116] In some embodiments, see Fig.15 The second ink portion 22 includes a first surface M1 away from the bending portion 13 . The first surface M1 is in an arc-shaped structure and protrudes toward the direction close to the bending portion 13 .

[0117] The first surface M1 is the surface of the second ink portion 22 away from the bent portion 13. In the flattened state, the distance between the first surface M1 and the bent portion 13 in the thickness direction Z determines the average thickness of the second ink portion 22. The first surface M1 is an arc-shaped structure. It should be noted that the arc-shaped structure mentioned here refers to the arc-shaped cross-sectional shape of the first surface M1 in the flattened state.

[0118] In the embodiment of the present application, the arc-shaped structure protrudes toward the direction close to the bending portion 13, that is, the middle position of the first surface M1 is low and the positions on both sides are high. Furthermore, the thickness of the second ink portion 22 is thin at the central position in the first direction X and thick near the positions on both sides. This design makes it easier to bend at the bending starting point, thereby reducing the difficulty of bending.

[0119] In some embodiments, the ink layer 20 further includes a third ink section 23 disposed on the second portion 12 , and the thickness of the second ink section 22 where it connects to the first ink section 21 is the same as the thickness of the second ink section 22 where it connects to the third ink section 23 .

[0120] In the flattened state, the first ink section 21, the second ink section 22 and the third ink section 23 are sequentially connected in the first direction X. As can be seen from the above content, in the direction from the first part 11 to the second part 12, the thickness of the second ink section 22 first shows a trend of gradually decreasing, and then shows a trend of gradually increasing. On this basis, in the embodiment of the present application, the thickness of the second ink section 22 connected to the first ink section 21 is set to be the same as the thickness of the second ink section 22 connected to the third ink section 23, so as to make the position with the smallest thickness in the second ink section 22 as far as possible in the central position of the second ink section 22, thereby further reducing the difficulty of bending.

[0121] It should be noted that, in the display module, the connection position between the first ink section 21 and the second ink section 22 usually does not play a display function, and even if the film layer structure at this position changes significantly, it will not affect the display effect of the display module. Therefore, the first ink section 21 and the second ink section 22 do not need to have a smooth transition, that is, the thickness of the second ink section 22 connected to the first ink section 21 can be the same as the thickness of the first ink section 21 connected to the second ink section 22, or it can be different. Similarly, the first ink section 21 and the third ink section 23 do not need to have a smooth transition, that is, the thickness of the second ink section 22 connected to the third ink section 23 can be the same as the thickness of the third ink section 23 connected to the second ink section 22, or it can be different.

[0122] In some embodiments, see Fig.17 In the direction from the first portion 11 to the second portion 12, the thickness of the second ink portion 22 first increases gradually and then decreases gradually.

[0123] It should be noted that the thickness variation trend of the second ink portion 22 mentioned here refers to the thickness variation trend of the second ink portion 22 at different positions in the first direction X when the display module is flattened. The thickness of the second ink portion 22 at different positions is not completely the same, and the thickness of the second ink portion 22 at the position close to the first portion 11 and the position close to the second portion 12 is less than the thickness of the second ink portion 22 at the central position in the first direction X.

[0124] The thickness of the second ink portion 22 may vary in a gradient manner, that is, in the direction from the first portion 11 to the second portion 12, the surface of the second ink portion 22 away from the bending portion 13 may have a stepped structure; or the thickness of the second ink portion 22 may vary linearly, that is, in the direction from the first portion 11 to the second portion 12, the surface of the second ink portion 22 away from the bending portion 13 may be two intersecting planar structures, or the thickness of the second ink portion 22 may vary exponentially, etc., and the embodiments of the present application do not impose any restrictions on this.

[0125] In the embodiment of the present application, the second ink portion 22 is set to be thick in the center and thin on both sides in the first direction X, so that when the display module is bent, the lateral pressure of the display module is increased. Specifically, after the display module is bent, it is necessary to perform a strength test on the display module. For example, a test pressure head is abutted near the junction of the bending portion 13 and the first portion 11, and a test pressure parallel to the thickness direction Z is provided to the display module through the test pressure head. When the test pressure is greater than a specific value, the display module will undergo relative deformation, and the test pressure head will be displaced in the first direction X. Among them, the lateral pressure refers to the corresponding pressure when the test pressure head is displaced in the first direction X.

[0126] In the embodiment of the present application, due to the design of the second ink portion 22 being thick in the middle and thin on both sides, it is possible to make it more difficult for the central position of the second ink portion 22 to deform, thereby increasing the lateral pressure of the display module in a bent state, that is, increasing the impact resistance of the display module during use, and improving the reliability of the display module.

[0127] It should be noted that the ink material used to form the ink layer 20 is usually fluid, so in the process of forming the ink layer 20, the ink material can be dropped at a specific position by a micro-nozzle printing method to adjust the thickness of the ink layer 20 at different positions. Fig.18For example, when preparing the second ink portion 22, the number of dripping rows of the ink material in the first direction X can be controlled by a micro nozzle, so that more rows of ink material can be dripped near the starting position of the bending portion 13 when bending relative to the edges on both sides of the first direction X, and then the ink materials flow and merge with each other, so that the thickness of the second ink portion 22 formed is the largest at the central position in the first direction X, and the thickness near the edges on both sides tends to gradually decrease.

[0128] In some embodiments, Fig.17 As shown, the second ink portion 22 includes a first surface M1 away from the bending portion 13 . The first surface M1 is in an arc-shaped structure and protrudes in a direction away from the bending portion 13 .

[0129] In the embodiment of the present application, the arc-shaped structure protrudes in the direction away from the bending portion 13, that is, the middle position of the first surface M1 is high and the positions on both sides are low. Furthermore, the thickness of the second ink portion 22 is large at the central position in the first direction X and thin near the positions on both sides. This design can further improve the lateral pressure of the display module in the bent state, so as to improve the reliability of the display module.

[0130] In some embodiments, Fig.15 or Fig.17 As shown, the minimum thickness of the second ink portion 22 is H1, and the maximum thickness is H2, and H1 and H2 satisfy: H2 ≥ H1 + 5 μm.

[0131] In the embodiment of the present application, the thickness at different positions of the second ink portion 22 may be different. When the thickness of the second ink portion 22 at different positions in the first direction X is thin in the middle and thick on both sides, the embodiment of the present application controls the maximum thickness difference at different positions in the second ink portion 22 to be not less than 5 μm, so that the thickness of the second ink portion 22 at the central position in the first direction X is as thin as possible, thereby further reducing the difficulty of bending the display module.

[0132] When the thickness of the second ink portion 22 at different positions in the first direction X is thick in the middle and thin on both sides, the embodiment of the present application controls the maximum thickness difference at different positions in the second ink portion 22 to be no less than 5μm, so that the thickness of the second ink portion 22 at the central position in the first direction X is as large as possible, thereby further increasing the lateral pressure that the display module can withstand in the bent state, thereby further improving the reliability of the display module.

[0133] It should be noted that the maximum thickness H2 of the second ink portion 22 may be less than the average thickness of the first ink portion 21, or the maximum thickness H2 of the second ink portion 22 may be equal to or greater than the average thickness of the first ink portion 21. The embodiment of the present application does not impose any restrictions on this, as long as the average thickness of the second ink portion 22 is less than the average thickness of the first ink portion 21.

[0134] In some embodiments, see Figures 19 to 21 The bending portion 13 is located on one side of the first portion 11 along the first direction X, the ink layer 20 includes a second ink portion 22 arranged on the bending portion 13, the second ink portion 22 includes a plurality of first sub-portions 221, and the plurality of first sub-portions 221 are spaced apart from each other in the first direction X.

[0135] In the flattened state, multiple first sections 221 are spaced apart in the first direction X, wherein the size and shape of each first section may be the same or different, and the spacing distances between different adjacent first sections 221 in the first direction X may be the same or different, and the embodiments of the present application do not impose any restrictions on this.

[0136] In the embodiment of the present application, since the multiple first divisions 221 are arranged at intervals from each other, gap spaces can be formed between adjacent first divisions 221. The thickness of the display module at the position corresponding to the gap space is usually small. Therefore, the existence of the gap space can reduce the difficulty of bending the display module, thereby facilitating the display module to quickly convert from a flattened state to a bent state, thereby improving the preparation efficiency of the display module.

[0137] It should be noted that in order to ensure the protective effect of the second ink portion 22 on the bending portion 13, it is necessary to ensure that the spacing between the plurality of first sub-portions 221 is relatively small. For example, the maximum distance between adjacent first sub-portions 221 is less than 5 μm, so that the display module can be quickly bent while satisfying the protective effect on the bending portion 13.

[0138] In some other embodiments, see Fig. 22 The second ink portion 22 is provided with a hollow portion 222 , and the hollow portion 222 is provided through the second ink portion 22 .

[0139] In the flattened state, the hollow portion 222 may penetrate the second ink portion 22 along the thickness direction, or the hollow portion 222 may penetrate the second ink portion 22 along other directions intersecting the thickness direction. For example, in the flattened state, the projection of the second ink portion 22 in the thickness direction is a mesh structure, and the grids in the mesh structure correspond to the positions of the hollow portions 222.

[0140] In the embodiment of the present application, the thickness dimension of the display module at the position corresponding to the hollow portion 222 is usually small, so the presence of the hollow portion 222 can reduce the difficulty of bending the display module, thereby facilitating the display module to quickly convert from a flat state to a bent state, thereby improving the preparation efficiency of the display module.

[0141] In some embodiments, see Fig.23 and Fig.24 The ink layer 20 includes a second ink portion 22 disposed on the bending portion 13 , and the second ink portion 22 includes a first surface M1 away from the bending portion 13 , and a portion of the structure in the first surface M1 is recessed inward to form a groove structure 223 .

[0142] The groove structure 223 is formed by the first surface M1 being recessed in a direction close to the bending portion 13. In the flattened state, the groove structure 223 may be recessed along the thickness direction Z, or along other directions intersecting the thickness direction Z. The embodiment of the present application does not limit the number of the groove structures 223. For example, the number of the groove structures 223 may be one or more.

[0143] Due to the presence of the groove structure 223, the thickness of the partial structure in the second ink portion 22 is relatively small, thereby reducing the difficulty of bending the display module. At the same time, since the partial structure in the second ink portion 22 also exists between the groove structure 223 and the bending portion 13, the partial structure can also play a role in protecting the bending portion 13, reducing the risk of cracks in the bending portion 13.

[0144] In addition, during the bending process, due to the influence of the thickness of the ink layer 20, the bending radius of the second ink portion 22 facing the bending portion 13 is different from the bending radius of the second ink portion 22 facing away from the bending portion 13. In this case, if the first surface M1 is a continuous planar structure, it is easy to generate bending stress inside the second ink portion 22 during the bending process, and the existence of bending stress may affect the structural stability of the second ink portion 22, thereby causing risks such as damage.

[0145] In the embodiment of the present application, the groove structure 223 is disposed on the first surface M1 . During the bending process, the presence of the groove structure 223 can release the stress generated by the deformation of the second ink portion 22 , thereby improving the structural reliability of the second ink portion 22 .

[0146] It should be noted that, in the expanded state, the embodiment of the present application does not limit the depression depth of the groove structure 223 in the thickness direction Z. For example, the depression depth of the groove structure 223 in the thickness direction Z may be 1 / 2 or 1 / 3 of the average thickness of the second ink portion 22 .

[0147] In some embodiments, the transmittance of the ink layer 20 is not less than 90%.

[0148] As can be seen from the above content, part of the structure in the ink layer 20 is arranged on the first part 11, and the first part 11 is provided with a part of the structure that provides the display effect for the display panel 10. On this basis, in order to increase the maximum brightness of the display module, it is necessary to increase the light output rate of the display module. Therefore, the embodiment of the present application restricts the material of the ink layer 20 so that the transmittance of the ink layer 20 is not less than 90%, thereby being able to increase the light output rate of the display module to improve the display effect.

[0149] In some embodiments, the curing rate of the ink layer 20 is not less than 90%.

[0150] The ink material needs to be cured under appropriate conditions to form the ink layer 20. The embodiment of the present application does not limit the curing method of the ink layer 20. For example, the ink layer 20 can be cured by ultraviolet irradiation.

[0151] Due to inappropriate curing conditions or other factors, the ink layer 20 is usually not fully cured, which affects the structural stability of the ink layer 20. Therefore, the curing rate of the ink layer 20 is set to not less than 90% in the embodiment of the present application to ensure that the shape of the ink layer 20 after preparation is maintained well and that the ink layer 20 can meet the bending requirements.

[0152] In some embodiments, ink layer 20 includes zirconium dioxide.

[0153] Zirconium dioxide is referred to as zirconium oxide, and its chemical formula is ZrO2. By arranging zirconium dioxide in the ink layer 20, the refractive index of the ink layer 20 can be increased, thereby changing the light emission direction, thereby increasing the display brightness and reducing the loss of the display module.

[0154] In some embodiments, the thickness of the ink layer 20 is W, and W satisfies: 5 μm≤W≤30 μm.

[0155] The thickness of the ink layer 20 at different positions may be the same or different. The 5μm≤W≤30μm mentioned in the embodiment of the present application means that the thickness at any position of the ink layer 20 satisfies the above formula. That is, the thickness at the thinnest position of the ink layer 20 needs to be no less than 5μm, and the thickness at the thickest position of the ink layer 20 needs to be no more than 30μm.

[0156] If the thickness W of the ink layer 20 is too small, it will be difficult for the ink layer 20 to protect the bending portion 13 during the bending process, which may easily cause cracks in the bending portion 13. Therefore, the embodiment of the present application sets the thickness W to be no less than 5 μm, thereby ensuring that the ink layer 20 located on the bending portion 13 can better protect the bending portion 13.

[0157] If the thickness W of the ink layer 20 is too large, the presence of the ink layer 20 will increase the overall thickness of the final display module, which is not conducive to the user experience and cannot meet the requirements of thinness. Therefore, the embodiment of the present application sets the thickness W to be no greater than 30 μm, thereby reducing the overall thickness of the final display module as much as possible to meet the requirements of thinness.

[0158] In addition, in the related art, the thickness of the BPL glue used to cover the bending portion 13 is usually 90±20μm or 70±20μm. In the embodiment of the present application, the thickness W of the ink layer 20 is set to be no more than 30μm, that is, compared with the BPL glue, the thickness of the ink layer 20 is smaller, so that the frame size of the display module in the bent state can be reduced to a certain extent, thereby improving the display effect.

[0159] In some embodiments, the elastic modulus of the ink layer 20 is E, and E satisfies: 0.1 GPa≤E≤10 GPa. Exemplarily, E is one of 0.1 GPa, 0.5 GPa, 1 GPa, 3 GPa, 5 GPa, and 10 GPa.

[0160] The elastic modulus mentioned in the embodiments of the present application refers to: when the material is in the elastic deformation stage, its stress and strain become in direct proportional relationship (i.e., it conforms to Hooke's law), and its proportionality coefficient is called the elastic modulus.

[0161] If the elastic modulus E of the ink layer 20 is too small, the ink layer 20 will be greatly deformed during the transition from the flat state to the bent state, which will easily cause a large offset relative to the display panel 10, affecting the yield rate of the display module. At the same time, since the thickness of the ink layer 20 is usually less than the thickness of the BPL glue, it is necessary to ensure that the ink layer 20 has a large elastic modulus to meet its strength requirements. Therefore, the embodiment of the present application sets the elastic modulus E of the ink layer 20 to be not less than 0.1 GPa to ensure the reliability of the relative position between the ink layer 20 and the display panel 10 during the bending process, and to meet the strength requirements of the ink layer 20.

[0162] If the elastic modulus E of the ink layer 20 is too large, the ink layer 20 is easily separated from the bending portion 13 during the transition from the flat state to the bent state. Therefore, in the embodiment of the present application, the elastic modulus E of the ink layer 20 is set to be no greater than 10 GPa, so as to reduce the probability of separation between the ink layer 20 and the bending portion 13 and improve the product yield.

[0163] In some embodiments, the viscosity of the ink layer 20 is μ, and μ satisfies: 10 cp≤μ≤25 cp. Exemplarily, the viscosity μ of the ink layer 20 is one of 10 cp, 15 cp, 20 cp, and 25 cp.

[0164] If the viscosity μ of the ink layer 20 is too small, it is easy to cause the ink layer 20 to separate from the adjacent film layer, resulting in display abnormalities and other problems, which is not conducive to the long-term use of the display module. Therefore, in the embodiment of the present application, the viscosity μ of the ink layer 20 is set to be not less than 10cp, so that the ink layer 20 can be tightly bonded to the adjacent film layer to improve the reliability of the display module.

[0165] In the process of converting from the flat state to the bent state, due to the different positions of the film layers, the deformation amounts generated by different film layers are also different. At this time, if the viscosity μ of the ink layer 20 is too large, it is easy to cause the ink layer 20 to pull the adjacent film layers to excessively deform during the bending process, resulting in structural abnormalities in the adjacent film layers. Therefore, the viscosity μ of the ink layer 20 is set to no more than 25cp in the embodiment of the present application, so as to reduce the risk of abnormalities in the display module during the bending process.

[0166] Second, see Fig.25 The embodiment of the present application provides a display device, including the display module in any of the above embodiments. The display device includes but is not limited to a mobile phone, a computer screen, and a car display.

[0167] It should be noted that the display module mentioned in the embodiment of the present application refers to: a display module in a bent state. The display device provided in the embodiment of the present application has the beneficial effects of the display module in any of the aforementioned embodiments. The beneficial effects of the display device are not described in detail in the embodiment of the present application. Please refer to the aforementioned description of the beneficial effects of the display module for details.

[0168] Third, see Fig.26 27 , the present application embodiment provides a method for preparing a display module, comprising:

[0169] S100: providing an initial substrate.

[0170] See also Fig.27a In step S100, the initial substrate 10' has a first area 11', a third area 13' and a second area 12' arranged in sequence in a first direction X. The initial substrate 10' corresponds to the display panel in a flattened state, the first area 11' of the initial substrate 10' is the first part of the display panel, the second area 12' of the initial substrate 10' is the second part of the display panel, and the third area 13' of the initial substrate 10' is the bent portion of the display panel.

[0171] S110: forming an ink layer on the initial substrate at positions corresponding to the first area and the third area.

[0172] See also Figure 27bIn step S110, the ink layer 20 is formed on the first area 11' and the third area 13' at the same time. The present embodiment does not limit the formation method of the ink layer 20. For example, the ink layer 20 can be formed by micro-nozzle printing, so that the ink layer 20 has a higher preparation accuracy. At the same time, according to actual needs, the thickness of the ink layer 20 on the first area 11' and the third area 13' can be appropriately adjusted to meet the bending and protection needs of the display module.

[0173] It should be noted that, in addition to forming the ink layer 20 at the first area 11' and the third area 13', the ink layer 20 can also be formed at the second area 12', that is, the ink layer 20 extends from the first area 11' through the third area 13' to the second area 12'.

[0174] S120: forming a polarizing layer on a side of the ink layer away from the initial substrate and corresponding to a position of the first zone.

[0175] See also Fig.27c In step S120, after the polarizing layer 30 is formed on the ink layer 20, the probability of the material in the ink layer 20 transferring to the side of the polarizing layer 30 away from the display panel 10 is low. Therefore, the existence of the ink layer 20 has little effect on the polarizing layer 30 and will not have an adverse effect on the subsequent process, which helps to improve the manufacturing yield of the display module.

[0176] In addition, the presence of the ink layer 20 can ensure that the film structure where the polarizing layer 30 is located is relatively flat, thereby reducing the risk of cracks in the polarizing layer 30 and improving the preparation yield of the polarizing layer 30 .

[0177] S130: forming a first support portion at a first area on a side of the initial substrate facing away from the ink layer.

[0178] See also Fig.27d In step S130, the polarizing layer 30 and the first supporting portion 41 are respectively formed on both sides of the initial substrate 10', the first supporting portion 41 has a first edge E1 on the side of the first direction X and close to the third area 13', the polarizing layer 30 has a second edge E2 on the side of the first direction X and close to the third area 13', and the distance between the first edge E1 and the second edge E2 in the first direction X is D, and D satisfies: D≤0.3mm.

[0179] Please combine Fig.26 as well as Fig.28From the above, in the embodiment of the present application, since the ink layer 20 extends to the third area 13', compared with the related art, it is possible to cancel the setting of BPL glue on the third area 13' without adding additional processes, thereby simplifying the preparation process and saving the waiting time after the preparation of the BPL glue. Normally, after the preparation of the BPL glue, it is necessary to wait for seven days before proceeding to the next process. Therefore, the preparation time of the display module can be further reduced, thereby improving production efficiency.

[0180] In addition, since the process of BPL glue is eliminated, there is no need to set a larger distance between the first edge E1 and the second edge E2 in the first direction X to meet the detection accuracy of BPL glue. Therefore, the distance D between the first edge E1 and the second edge E2 in the first direction X can be reduced to no more than 3μm, which helps to achieve a narrow frame effect.

[0181] It should be noted that step S130 may be performed after step S120, or before step S120, or before step S110, and this is not limited in the embodiment of the present application.

[0182] S140: Soldering the driving chip to the second area of ​​the initial substrate.

[0183] See also Fig.27e In step S140, the installation of the driver chip IC is located after the polarizer preparation process, that is, step S140 is located after step S120, and there is no need to prepare BPL glue between these two steps, thereby reducing the preparation process and improving production efficiency.

[0184] It should be noted that the embodiment of the present application only describes part of the preparation process of the display module. There may be other steps between adjacent steps, and other steps may be included after step S140, such as packaging and cutting, etc. The embodiment of the present application does not limit this.

[0185] Although the embodiments disclosed in this application are as above, the contents described are only embodiments adopted for facilitating the understanding of this application and are not intended to limit the present invention. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of protection of this application shall still be subject to the scope defined in the attached claims.

[0186] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the replacement of other connection methods described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A display module, characterized in that: include: The display panel comprises a first portion, a bending portion and a second portion which are connected in sequence, wherein the second portion can be bent to one side in a thickness direction of the first portion through the bending portion; An ink layer, stacked on one side of the display panel, and the ink layer simultaneously covers at least a portion of the structure of the first portion and at least a portion of the structure of the bent portion; a polarizing layer, disposed on one side of the first portion in the thickness direction and located on a side of the ink layer away from the display panel; Wherein, at least part of the light emitted by the first part is emitted from the display module through the ink layer and the polarizing layer; The ink layer includes a first ink portion disposed on the first portion, and a second ink portion disposed on the bending portion, wherein an average thickness of the second ink portion is smaller than an average thickness of the first ink portion; In the direction from the first part to the second part, the thickness of the second ink part firstly decreases gradually and then increases gradually; The ink layer further includes a third ink portion disposed on the second portion; The thickness of the second ink portion where it is connected to the first ink portion is the same as the thickness of the second ink portion where it is connected to the third ink portion.

2. The display module according to claim 1, characterized in that: Also includes a support layer, the support layer includes a first support portion, the first support portion is arranged on a side of the first portion away from the ink layer; The bending portion is located at one side of the first part in the first direction, the first support portion has a first edge on one side of the first direction and close to the bending portion, and the polarizing layer has a second edge on one side of the first direction and close to the bending portion. The distance between the first edge and the second edge in the first direction is D, and D satisfies: D≤0.3 mm.

3. The display module according to claim 2, characterized in that: Projections of the first edge and the second edge in the thickness direction overlap.

4. The display module according to claim 1, characterized in that: It also includes an optical function layer disposed between the display panel and the ink layer, wherein the refractive index of the ink layer is higher than the refractive index of the optical function layer; The optical function layer covers at least a part of the structure of the first portion, and in the thickness direction, there is no overlapping area between the projection of the optical function layer and the projection of the bending portion.

5. The display module according to claim 4, characterized in that: The ink layer extends to the second portion; The optical function layer comprises a first optical portion arranged on the second portion, a side of the first optical portion facing away from the second portion is recessed inward to form a limiting channel, and the ink layer terminates at the limiting channel.

6. The display module according to claim 4, characterized in that: The bending portion is located at one side of the first portion along the first direction; The optical function layer includes a first optical portion disposed on the second portion, and in the first direction, the ink layer terminates at an end of the first optical portion close to the bending portion.

7. The display module according to claim 1, characterized in that: The second ink portion includes a first surface facing away from the bending portion, wherein the first surface is in an arc-shaped structure and protrudes toward a direction close to the bending portion.

8. The display module according to claim 1, characterized in that: The minimum thickness of the second ink portion is H1, and the maximum thickness is H2, and H1 and H2 satisfy: H2 ≥ H1 + 5 μm.

9. The display module according to claim 1, characterized in that: The bending portion is located at one side of the first part along the first direction, the ink layer includes a second ink portion arranged on the bending portion, the second ink portion includes a plurality of first sub-portions, and the plurality of first sub-portions are arranged spaced apart from each other in the first direction; or The second ink portion is provided with a hollow portion, and the hollow portion is arranged to penetrate the second ink portion.

10. The display module according to claim 1, characterized in that: The ink layer includes a second ink portion disposed on the bending portion, the second ink portion includes a first surface on a side away from the bending portion, and a portion of the structure in the first surface is recessed inward to form a groove structure.

11. The display module according to claim 1, characterized in that: The transmittance of the ink layer is not less than 90%.

12. The display module according to claim 1, characterized in that: The curing rate of the ink layer is not less than 90%.

13. The display module according to claim 1, characterized in that: The ink layer includes zirconium dioxide.

14. The display module according to claim 1, characterized in that: The thickness of the ink layer is W, and W satisfies: 5 μm≤W≤30 μm.

15. The display module according to claim 1, characterized in that: The elastic modulus of the ink layer is E, and E satisfies: 0.1 GPa≤E≤10 GPa.

16. The display module according to claim 1, characterized in that: The viscosity of the ink layer is μ, and μ satisfies: 10cp≤μ≤25cp.

17. A display device, characterized in that: Comprising a display module as described in any one of claims 1 to 16.

18. A method for preparing the display module according to claim 1, characterized in that: include: Providing an initial substrate, wherein the initial substrate has a first region, a third region, and a second region sequentially arranged side by side in a first direction; forming an ink layer on the initial substrate at positions corresponding to the first area and the third area; forming a polarizing layer on a side of the ink layer away from the initial substrate and corresponding to a position of the first area; A first supporting portion is formed at the first region on a side of the initial substrate away from the ink layer, the first supporting portion has a first edge on a side in the first direction close to the third region, the polarizing layer has a second edge on a side in the first direction close to the third region, a distance D between the first edge and the second edge in the first direction is satisfied: D≤0.3 mm; Soldering the driver chip to the second area of ​​the initial substrate; At least part of the light emitted from the first area passes through the ink layer and the polarizing layer and leaves the display module.

Images