Display module, preparation method of display module and display device

Abstract

The invention provides a display module, a preparation method of the display module and a display device.The display module comprises a display panel which comprises a display area, a binding area and a bending area located between the display area and the binding area; the polaroid is located on one side of the display panel and located in the display area; the bending protection layer is located on the same side of the display panel and the polaroid and is at least located in the bending area; wherein the side, close to the polaroid, of the bending protection layer makes contact with the polaroid, and in the direction perpendicular to the plane where the display panel is located, the contact height of the bending protection layer and the polaroid is smaller than or equal to the thickness of the bending protection layer; or, a gap is formed between the bending protection layer and the polaroid, and the inclination angle of the side, close to the polaroid, of the bending protection layer is smaller than the inclination angle of the side, away from the polaroid, of the bending protection layer. According to the invention, bubbles of the display module during optical cement lamination can be avoided.

Description

Technical Field

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

[0002] In order to increase the front screen-to-body ratio, current display panels bend the binding area to the other side of the light-emitting surface of the display panel, thus forming a bending area between the display area and the binding area. The display panel will prepare a bending protection layer on the bending area to protect the bending area.

[0003] However, in the related art, the bending protection layer is made of protective glue. When curing, the protective glue will climb onto the polarizer protective film. After the polarizer protective film is torn off, a sharp corner is left on the side of the bending protection layer close to the display panel, which will cause bonding bubbles after the optical glue is applied. Summary of the invention

[0004] In view of this, the present invention provides a display module, a method for preparing the display module and a display device, so as to at least solve the problem of bubbles existing in the conventional display module when optical adhesive is bonded.

[0005] In one aspect, an embodiment of the present invention provides a display module, comprising: a display panel, comprising a display area, a binding area, and a bending area located between the display area and the binding area; a polarizer, located on one side of the display panel and in the display area; a bending protection layer, located on the same side of the display panel as the polarizer and at least in the bending area; wherein the bending protection layer is in contact with the polarizer on a side close to the polarizer, and a contact height between the bending protection layer and the polarizer along a direction perpendicular to the plane where the display panel is located is less than or equal to a thickness of the bending protection layer; or, there is a gap between the bending protection layer and the polarizer, and the inclination angle of the bending protection layer on the side close to the polarizer is smaller than the inclination angle on the side away from the polarizer.

[0006] On the other hand, an embodiment of the present invention also provides a method for preparing a display module, comprising: providing a display panel; wherein the display panel includes a display area, a binding area and a bending area located between the display area and the binding area; arranging a polarizer on one side of the display panel; wherein the polarizer is located in the display area, and a protective film is provided on the side of the polarizer facing away from the display panel; arranging a bending protective layer on the same side of the display panel as the polarizer; wherein the bending protective layer is at least located in the bending area, and the side of the bending protective layer close to the polarizer is in contact with the polarizer, and along the direction perpendicular to the plane where the display panel is located, the contact height between the bending protective layer and the polarizer is less than or equal to the thickness of the bending protective layer; or, there is a gap between the bending protective layer and the polarizer, and the inclination angle of the bending protective layer close to the polarizer is smaller than the inclination angle of the side away from the polarizer; and tearing off the protective film on the polarizer.

[0007] In yet another aspect, an embodiment of the present invention further provides a display device, comprising the above-mentioned display module.

[0008] The display module, the preparation method of the display module and the display device of the present invention, when the bending protective layer is in contact with the polarizer on the side close to the polarizer, the contact height between the bending protective layer and the polarizer in the direction perpendicular to the plane where the display panel is located is less than or equal to the thickness of the bending protective layer; or, when the bending protective layer is not in contact with the polarizer on the side close to the polarizer, a gap is provided between the bending protective layer and the polarizer, thereby preventing the protective glue of the bending protective layer from climbing onto the polarizer protective film when curing, thereby avoiding the sharp corner formed on the side of the bending protective layer close to the display panel after the polarizer protective film is torn off, thereby avoiding the presence of bubbles in the display module after the optical adhesive layer is affixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0010] Figure 1 It is a structural schematic diagram of a display module preparation process in the related art;

[0011] Figure 2 is a structural schematic diagram of a display module preparation process provided by an embodiment of the present invention;

[0012] Figure 3 is a structural schematic diagram of another display module preparation process provided by an embodiment of the present invention;

[0013] Figure 4 is a structural schematic diagram of another display module preparation process provided by an embodiment of the present invention;

[0014] Figure 5 is a structural schematic diagram of another display module preparation process provided by an embodiment of the present invention;

[0015] Figure 6 is a structural schematic diagram of a display module provided by an embodiment of the present invention;

[0016] Figure 7 is a flowchart of a method for preparing a display module provided by an embodiment of the present invention;

[0017] Figure 8 yes Figure 7 A schematic diagram showing a method for preparing a module is shown in FIG.

[0018] Fig. 9 yes Figure 7 Specific step flow chart of step S130;

[0019] Fig.10 yes Fig. 9 Schematic diagram of step S130;

[0020] Fig.11 It is a structural schematic diagram of a display device provided by an embodiment of the present invention.

[0021] Reference numerals:

[0022] 100. Display module;

[0023] 10. Display panel;

[0024] 11. Display area;

[0025] 12. Bending area;

[0026] 13. Binding area;

[0027] 20. Polarizer;

[0028] 30. Bending protection layer;

[0029] 40. Support layer;

[0030] 50. Polarizer protective film;

[0031] 60. Optical adhesive layer;

[0032] 70. Cover plate;

[0033] 200. Display device. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0035] The words "first", "second" and the like used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in the description of the present invention, the orientation or position relationship indicated by the terms "upper" and "lower" are based on the orientation or position relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0037] In related technologies, such as Figure 1 As shown, the display module includes a display panel 10 (Panel), a polarizer 20 (Polarizer, POL) and a bending protect layer 30 (Bending Protect Layer, BPL). The display panel 10 includes a display area 11, a binding area 13 and a bending area 12 located between the display area 11 and the binding area 13. The polarizer 20 is located on one side of the display panel 10 and is located in the display area 11. In order to increase the front screen ratio, the current display panel 10 will bend the binding area 13 to the other side of the light emitting surface of the display panel 10, so that a bending area 12 is formed between the display area 11 and the binding area 13. The display module 100 will prepare a bending protect layer 30 in the bending area 12 of the display panel 10 to protect the bending area 12. In addition, when preparing the polarizer 20, a layer of polarizer protective film 50 (Polarizer Film, PF) is usually first attached to prevent foreign matter from damaging the polarizer 20. The polarizer protective film 50 will be torn off when preparing the next film layer.

[0038] However, in the related art, the bending protection layer 30 is usually made of protective glue. When the bending protection layer 30 is cured, due to the capillary phenomenon, the protective glue will climb up the polarizer protective film 50 and adhere to the polarizer protective film 50. After the polarizer protective film 50 is torn off, a sharp corner will be left on the side of the bending protection layer 30 close to the display panel 10, and the tip of the sharp corner is higher than the polarizer 20. Therefore, when the optical adhesive layer 60 (OCA) is subsequently prepared on the polarizer 20, bubbles will exist between the optical adhesive layer 60, the polarizer 20 and the bending protection layer 30, affecting the yield of the display module 100.

[0039] The inventor of this case has provided a solution to the problems existing in the prior art through careful and in-depth research. The present invention provides a display module, a method for preparing a display module, and a display device, wherein the display module includes: a display panel, including a display area, a binding area, and a bending area between the display area and the binding area; a polarizer, located on one side of the display panel and located in the display area; a bending protection layer, located on the same side of the display panel as the polarizer and at least located in the bending area; wherein the bending protection layer contacts the polarizer on a side close to the polarizer, and along a direction perpendicular to the plane where the display panel is located, the contact height between the bending protection layer and the polarizer is less than or equal to the thickness of the bending protection layer; or, there is a gap between the bending protection layer and the polarizer, and the inclination angle of the bending protection layer on the side close to the polarizer is less than the inclination angle on the side away from the polarizer. The display module, the preparation method of the display module and the display device of the present invention, when the bending protective layer is in contact with the polarizer on the side close to the polarizer, the contact height between the bending protective layer and the polarizer in the direction perpendicular to the plane where the display panel is located is less than or equal to the thickness of the bending protective layer; or, when the bending protective layer is not in contact with the polarizer on the side close to the polarizer, a gap is provided between the bending protective layer and the polarizer, thereby preventing the protective glue of the bending protective layer from climbing onto the polarizer protective film when curing, thereby avoiding the sharp corner formed on the side of the bending protective layer close to the display panel after the polarizer protective film is torn off, thereby avoiding the presence of bubbles in the display module after the optical adhesive layer is affixed.

[0040] The above is the core idea of ​​the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0041] On one hand, Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a display module 100 , including: a display panel 10 , a polarizer 20 and a bending protection layer 30 .

[0042] The display panel 10 includes a display area 11, a binding area 13, and a bending area 12 between the display area 11 and the binding area 13. The display area 11 emits light on the side facing the polarizer 20, which is used to display the display module 100. The binding area 13 is used to connect the device of the driving chip and the flexible circuit board to drive the light-emitting state of the display area 11 or receive the light-emitting signal of the display area 11. The bending area 12 is used to connect the display area 11 and the binding area 13, and a plurality of wirings are formed in the bending area 12 to complete the signal transmission between the display area 11 and the binding area 13.

[0043] The polarizer 20 is located at one side of the display panel 10 and at the display area 11. The polarizer 20 is used to improve the contrast of the display panel 10, improve the viewing angle and reduce the reflectivity.

[0044] Among them, the bending protection layer 30 is located on the same side of the display panel 10 as the polarizer 20 and at least in the bending area 12. The bending protection layer 30 can be prepared by curing the protective glue. Since the bending area 12 of the display panel 10 needs to be kept in a bent state during preparation and subsequent finished products, the display module 100 is provided with a bending protection layer 30 to protect the bending area 12 of the display panel 10 to avoid physical damage and chemical corrosion of the bending area 12. In addition, the bending protection layer 30 can also improve the stress distribution in the entire display panel 10 to avoid damage to the display panel 10 during the bending process.

[0045] Specifically, the side of the bending protection layer 30 close to the polarizer 20 is in contact with the polarizer 20, and along the direction perpendicular to the plane where the display panel 10 is located, the contact height between the bending protection layer 30 and the polarizer 20 is less than or equal to the thickness of the bending protection layer 30; or, there is a gap between the bending protection layer 30 and the polarizer 20, and the inclination angle of the bending protection layer 30 close to the polarizer 20 is smaller than the inclination angle of the side away from the polarizer 20. Furthermore, since the bending protection layer 30 is prepared by coating multiple layers of protective glue on the bending area 12 and the binding area 13 of the display panel 10 and curing them by ultraviolet irradiation, in order to achieve the above-mentioned configuration, the coating amount of the layer of protective glue closest to the polarizer 20 along the direction from the binding area 13 to the bending area 12 can be reduced, thereby achieving, compared with the related art, that when the side of the bending protection layer 30 close to the polarizer 20 is in contact with the polarizer 20, the contact height between the bending protection layer 30 and the polarizer 20 is less than or equal to the thickness of the bending protection layer 30, or, when the side of the bending protection layer 30 close to the polarizer 20 is not in contact with the polarizer 20, there is a gap between the bending protection layer 30 and the polarizer 20, and the inclination angle of the bending protection layer 30 close to the polarizer 20 is smaller than the inclination angle of the side away from the polarizer 20.

[0046] It should be noted that the above-mentioned configuration is such that, when the bending protection layer 30 is in contact with the polarizer 20 on the side close to the polarizer 20, the contact height between the bending protection layer 30 and the polarizer 20 along the direction perpendicular to the plane where the display panel 10 is located is less than or equal to the thickness of the bending protection layer 30; or, when the bending protection layer 30 is not in contact with the polarizer 20 on the side close to the polarizer 20, there is a gap between the bending protection layer 30 and the polarizer 20, thereby preventing the protective glue of the bending protection layer 30 from climbing up the polarizer protective film 50 when curing, thereby preventing the sharp corner formed on the side of the bending protection layer 30 close to the display panel 10 after the polarizer protective film 50 is torn off, thereby preventing bubbles from existing on the display module 100 after the optical adhesive layer 60 is affixed.

[0047] It is understandable that the present application proposes two technical ideas, which can be used to avoid the problem of bubbles in the display module 100 after the optical adhesive layer 60 is attached, when the side of the bending protection layer 30 close to the polarizer 20 is in contact with the polarizer 20 or not in contact with the polarizer 20. The two technical ideas are further described below.

[0048] When the side of the bending protection layer 30 close to the polarizer 20 is in contact with the polarizer 20:

[0049] Continue to refer Figure 2 In some embodiments, the contact height between the side of the bending protection layer 30 close to the polarizer 20 and the polarizer 20 is greater than 0, and the contact end of the bending protection layer 30 and the polarizer 20 has an arc-shaped descending edge along the direction close to the polarizer 20. It can be understood that at this time, the contact height between the side of the bending protection layer 30 close to the polarizer 20 and the polarizer 20 is less than the thickness of the polarizer 20. The above arc-shaped descending edge can ensure that the protective glue of the bending protection layer 30 will not climb up the polarizer protective film 50 and then bond to the polarizer protective film 50 due to capillary phenomenon during curing. Therefore, the above setting can avoid the sharp corner formed on the side of the bending protection layer 30 close to the display panel 10 after the polarizer protective film 50 is torn off.

[0050] like Figure 4As shown, in some embodiments, the contact height of the bending protection layer 30 on the side close to the polarizer 20 and the polarizer 20 is equal to 0, and the contact end of the bending protection layer 30 and the polarizer 20 is a tip. At this time, the contact end of the bending protection layer 30 and the polarizer 20 still has an arc-shaped descending edge along the direction close to the polarizer 20, and the arc-shaped descending edge just drops to the bottom at the contact surface of the polarizer 20 and the display panel 10, so that the tip is in contact with the polarizer 20 and the display panel 10 at the same time. The setting of the contact height of the bending protection layer 30 and the polarizer 20 being equal to 0 can ensure that the protective glue of the bending protection layer 30 will not climb up the polarizer protective film 50, thereby avoiding the bonding of the bending protection layer 30 and the polarizer protective film 50.

[0051] When the side of the bending protection layer 30 close to the polarizer 20 is in contact with the non-polarizer 20:

[0052] like Figure 5 As shown, in some embodiments, there is a gap between the bending protection layer 30 and the polarizer 20, and the width of the gap is 0 to 200 microns. Specifically, Figure 5 D in the figure represents the width of the above-mentioned interval, and the interval width D is 0 to 200 microns. The above-mentioned range can prevent the protective glue of the bending protection layer 30 from climbing onto the polarizer protection film 50, while preventing the display panel 10 from being too large in area not protected by the bending protection layer 30, thereby ensuring that the bending protection layer 30 protects the bending area 12 from physical damage and chemical corrosion as much as possible, and at the same time, it can also avoid static electricity problems caused by the excessive interval between the bending protection layer 30 and the polarizer 20. It is understandable that the interval width D can be any value of 0 microns, 30 microns, 50 microns, 80 microns, 100 microns, 120 microns, 150 microns, 180 microns or 200 microns, and the present application does not limit this.

[0053] In summary of the above two situations, the present application can prevent the protective adhesive of the bending protection layer 30 from climbing up the polarizer protection film 50 when curing, thereby preventing a sharp corner from being formed on the side of the bending protection layer 30 close to the display panel 10 after the polarizer protection film 50 is torn off, thereby preventing bubbles from existing in the display module 100 after the optical adhesive layer 60 is attached. The following will further explain the features that can exist simultaneously in the two technical ideas.

[0054] Continue to refer Figure 2 , Figure 3 , Figure 4 and Figure 5In some embodiments, the upper surface of the bending protection layer 30 is flat. Specifically, the bending protection layer 30 is prepared by applying multiple layers of protective glue to the bending area 12 and the binding area 13 of the display panel 10, and curing by ultraviolet irradiation. During the above curing process, a pressing plate is attached to the surface of the multiple layers of protective glue away from the display panel 10, so that the upper surface of the bending protection layer 30 can be flat. The flat upper surface of the bending protection layer 30 can make the stress distribution of the display panel 10 in the bending area 12 uniform, thereby avoiding damage to the display panel 10 caused by uneven stress distribution during the bending process.

[0055] Continue to refer Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the thickness of the bending protection layer 30 is less than the thickness of the polarizer 20 to further prevent the protective glue of the bending protection layer 30 from climbing up the polarizer protective film 50 when curing. Specifically, the thickness of the bending protection layer 30 is 30 to 90 microns to protect the bending area 12 while preventing the display module 100 from being too thick. It is understandable that the thickness of the bending protection layer 30 can be any value of 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns or 90 microns, and this application does not limit this.

[0056] Continue to refer Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the ratio of the thickness of the bending protection layer 30 to the thickness of the polarizer 20 is in the range of 0.2 to 0.9. In order to achieve that when the side of the bending protection layer 30 close to the polarizer 20 is in contact with the polarizer 20, the contact height between the bending protection layer 30 and the polarizer 20 is less than or equal to the thickness of the bending protection layer 30; or, when the side of the bending protection layer 30 close to the polarizer 20 is not in contact with the polarizer 20, there is a gap between the bending protection layer 30 and the polarizer 20, so that the ratio of the thickness of the bending protection layer 30 to the thickness of the polarizer 20 is maintained in the above range, which can facilitate the above setting. It can be understood that the ratio of the thickness of the bending protection layer 30 to the thickness of the polarizer 20 can be any value of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, and this application does not limit this.

[0057] Continue to refer Figure 5In some embodiments, the display module 100 further includes: a support layer 40 (Back Plane, BP). The support layer 40 is located on the side of the display panel 10 away from the polarizer 20. Since the display panel 10 is flexible, the support layer 40 is required to support and fix it, and at the same time facilitate the bending of the display panel 10. The support layer 40 includes a first support portion and a second support portion, the first support portion is located in the display area 11 and partially located in the bending area 12, and the second support portion is located in the binding area 13. The first support portion and the second support portion are used to support the display area 11 and the binding area 13 of the display panel 10, respectively, and leave a gap in the bending area 12 to facilitate the bending of the display panel 10.

[0058] like Figure 6 As shown, in some embodiments, the display module 100 further includes: an optical adhesive layer 60. The optical adhesive layer 60 is located on the side of the polarizer 20 away from the display panel 10, and the optical adhesive layer 60 is located in the display area 11 and at least partially in the bending area 12. The side of the bending protection layer 30 close to the polarizer 20 contacts the polarizer 20, and along the direction perpendicular to the plane where the display panel 10 is located, the contact height between the bending protection layer 30 and the polarizer 20 is less than or equal to the thickness of the bending protection layer 30; or, there is a gap between the bending protection layer 30 and the polarizer 20, and the inclination angle of the side of the bending protection layer 30 close to the polarizer 20 is less than the inclination angle of the side away from the polarizer 20, which can prevent the protective adhesive of the bending protection layer 30 from climbing up the polarizer protective film 50 when curing, thereby avoiding the sharp angle formed on the side of the bending protection layer 30 close to the display panel 10 after the polarizer protective film 50 is torn off, thereby avoiding the presence of bubbles in the display module 100 after the optical adhesive layer 60 is attached.

[0059] Continue to refer Figure 6 In some embodiments, the display module 100 further includes: a cover plate 70. The cover plate 70 is located on the side of the polarizer 20 away from the display panel 10, and the cover plate 70 is located in the display area 11 and at least partially in the bending area 12. The portion of the cover plate 70 located in the bending area 12 does not contact the bending protection layer 30, so as to prevent the cover plate 70 from being adhered to the protective glue of the bending protection layer 30, resulting in the cover plate 70 transferring the protective glue to other film structures during the preparation process of the display module 100.

[0060] In some optional embodiments, the display panel 10 can be a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) display panel 10, an active-matrix organic light-emitting diode (AMOLED) display panel 10, a micro-light emitting diode (Micro-LED) display panel 10, etc., and the present application is not limited thereto. The display panels 10 described above all take the OLED display panel 10 as an example to schematically illustrate some embodiments of the present application. It is easy to understand that the implementation methods of the present application are not limited thereto, and can also be any other display panel 10 as long as they have the same technical concept.

[0061] The display module 100 of the present invention, when the bending protection layer 30 is in contact with the polarizer 20 on one side close to the polarizer 20, makes the contact height between the bending protection layer 30 and the polarizer 20 in a direction perpendicular to the plane where the display panel 10 is located less than or equal to the thickness of the bending protection layer 30; or, when the bending protection layer 30 is not in contact with the polarizer 20 on one side close to the polarizer 20, makes a gap between the bending protection layer 30 and the polarizer 20, thereby preventing the protective glue of the bending protection layer 30 from climbing up the polarizer protective film 50 when curing, thereby avoiding the sharp corner formed on the side of the bending protection layer 30 close to the display panel 10 after the polarizer protective film 50 is torn off, thereby avoiding the presence of bubbles in the display module 100 after the optical adhesive layer 60 is attached.

[0062] On the other hand, Figure 7 and Figure 8 As shown, an embodiment of the present invention further provides a method for preparing a display module, comprising:

[0063] S110, providing a display panel 10; wherein the display panel 10 includes a display area 11, a binding area 13, and a bending area 12 located between the display area 11 and the binding area 13;

[0064] S120, disposing a polarizer 20 on one side of the display panel 10; wherein the polarizer 20 is located in the display area 11, and a protective film is disposed on a side of the polarizer 20 away from the display panel 10;

[0065] S130, disposing a bending protection layer 30 on the same side of the display panel 10 as the polarizer 20; wherein the bending protection layer 30 is at least located in the bending area 12, and the side of the bending protection layer 30 close to the polarizer 20 is in contact with the polarizer 20, and along the direction perpendicular to the plane where the display panel 10 is located, the contact height between the bending protection layer 30 and the polarizer 20 is less than or equal to the thickness of the bending protection layer 30; or, there is a gap between the bending protection layer 30 and the polarizer 20, and the inclination angle of the bending protection layer 30 close to the polarizer 20 is less than the inclination angle of the side away from the polarizer 20;

[0066] S140 , tearing off the protective film on the polarizer 20 .

[0067] It is worth noting that the above S110 to S140 are merely step numbers, which are used to facilitate reference and avoid text duplication. Unless otherwise specified, the above and subsequent step numbers will not limit the order of implementation of the various steps of the method. In other embodiments, the above steps of the method can also be written and implemented in an interchangeable order, and are not limited thereto.

[0068] For the above steps S110 , S120 and S140 , the specific implementation methods and technical effects can refer to the above-mentioned embodiment of the display module 100 , which will not be described in detail here.

[0069] like Fig. 9 and Fig.10 As shown, in some embodiments, step S130 may specifically include:

[0070] S131, according to the width of the bending area 12 and the partial binding area 13 and the width of a layer of protective glue, calculate the amount of protective glue to be applied and locate the coating position of each layer of protective glue; wherein, along the direction from the binding area 13 to the bending area 12, the distance between the layer of protective glue with the smallest distance from the polarizer 20 and the polarizer 20 is 40% to 60% of the glue width of the protective glue;

[0071] S132, coating a layer of protective glue at the greatest distance from the polarizer 20 in the binding area 13 along the direction from the binding area 13 to the bending area 12, pre-curing the protective glue, and coating the remaining protective glue in sequence along the direction close to the polarizer 20;

[0072] S133, attaching a pressing plate to the surface of the plurality of protective adhesives facing away from the display panel 10, and curing the plurality of protective adhesives with ultraviolet light to form a bending protection layer 30;

[0073] S134 , removing the pressing plate attached to the bending protection layer 30 .

[0074] For the above step S131, the protective glue of the bending protection layer 30 can be specifically ultraviolet curing glue (UV glue). Since the bending protection layer 30 is formed by curing multiple layers of protective glue, it is necessary to first calculate the glue amount and position of each layer of protective glue, and specifically make the glue amount of the layer of protective glue closest to the polarizer 20 as the above setting, so that the bending protection layer 30 reaches a preset thickness, and the contact height between the bending protection layer 30 and the polarizer 20 is less than or equal to the thickness of the bending protection layer 30, or there is a gap between the bending protection layer 30 and the polarizer 20. It can be understood that the coating direction of each layer of protective glue is parallel to each other, and the coating direction of each layer of protective glue is perpendicular to the direction from the binding area 13 toward the display area 11.

[0075] Regarding the above step S132, the above setting can prevent the protective glue applied subsequently from flowing to other positions because it has not yet been cured, thereby ensuring that the bending protection layer 30 is cured and formed according to the preset position.

[0076] For the above step S133, the pressing plate can make the upper surface of the bending protection layer 30 flat. The flat upper surface of the bending protection layer 30 can make the stress distribution of the display panel 10 in the bending area 12 uniform, avoiding damage to the display panel 10 due to uneven stress distribution during the bending process. In addition, the pressing plate can effectively isolate the surface of the protective glue from oxygen during the curing process of the protective glue, reduce oxygen inhibition, and improve the surface adhesion of the bending protection layer 30, thereby preventing the cover plate from sticking to the protective glue of the bending protection layer 30, causing the cover plate to transfer the above protective glue to other film layer structures during the preparation process of the display module 100. At the same time, the pressing plate can prevent the surface of the protective glue from adhering to foreign matter during the curing process of the protective glue, thereby affecting the display effect.

[0077] In some embodiments, the material of the pressing plate includes: fluoroplastic or silicone plastic; wherein the fluoroplastic includes polytetrafluoroethylene, which is not limited in the present application. Since the surface energy of fluoroplastic and silicone plastic is relatively low, they are not bonded to the protective glue, so they can be used for pressing and are easy to remove. Moreover, both fluoroplastic and silicone plastic are transparent, which can avoid the influence of ultraviolet radiation during the curing process of the protective glue.

[0078] In some embodiments, after step S131 and before step S132, the process may further include: continuously introducing an inert gas into the preparation environment of the display module 100, and allowing the protective glue to be in the inert gas before curing; wherein the inert gas includes nitrogen. The inert gas can accelerate the curing speed of the protective glue and reduce the preparation time of the display panel 10.

[0079] For further specific implementation and technical effects of the method for preparing the display module of the present application, reference may be made to the specific embodiment of the display module 100 described above, and the repeated parts will not be repeated here.

[0080] On the other hand, Fig.11 As shown, an embodiment of the present invention further provides a display device 200, including the above-mentioned display module. The display device 200 can be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0081] The specific implementation and technical effects of the display device 200 of the present application can refer to the specific embodiment of the display module 100 mentioned above, and the repeated parts will not be repeated.

[0082] In summary, the display module, the preparation method of the display module and the display device of the present invention, by making the contact height between the bending protective layer and the polarizer in a direction perpendicular to the plane where the display panel is located less than or equal to the thickness of the bending protective layer when the bending protective layer is in contact with the polarizer on the side close to the polarizer; or by making a gap between the bending protective layer and the polarizer when the bending protective layer is not in contact with the polarizer on the side close to the polarizer, both of which can prevent the protective glue of the bending protective layer from climbing up the polarizer protective film when curing, thereby avoiding the sharp corner formed on the side of the bending protective layer close to the display panel after the polarizer protective film is torn off, thereby avoiding the presence of bubbles in the display module after the optical adhesive layer is affixed.

[0083] The above contents are further detailed descriptions of the present invention in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A display module, characterized in that: include: The display panel comprises a display area, a binding area and a bending area between the display area and the binding area; A polarizer, located on one side of the display panel and in the display area; A bending protection layer, located on the same side of the display panel as the polarizer and at least located in the bending area; The bending protection layer is in contact with the polarizer on one side thereof close to the polarizer, and along a direction perpendicular to the plane where the display panel is located, a contact height between the bending protection layer and the polarizer is less than or equal to a thickness of the bending protection layer; Alternatively, there is a gap between the bending protection layer and the polarizer, and the inclination angle of the bending protection layer on a side close to the polarizer is smaller than the inclination angle of the side away from the polarizer.

2. The display module according to claim 1, characterized in that: The contact height between the side of the bending protection layer close to the polarizer and the polarizer is greater than 0, and the contact end of the bending protection layer and the polarizer has an arc-shaped descending edge along a direction close to the polarizer.

3. The display module according to claim 1, characterized in that: The contact height between the side of the bending protection layer close to the polarizer and the polarizer is equal to 0, and the contact end of the bending protection layer and the polarizer is a pointed end.

4. The display module according to claim 1, characterized in that: There is a gap between the bending protection layer and the polarizer, and the width of the gap is 0 to 200 microns.

5. The display module according to claim 1, characterized in that: The upper surface of the bending protection layer is flat.

6. The display module according to claim 1, characterized in that: The thickness of the bending protection layer is less than the thickness of the polarizer; the thickness of the bending protection layer is 30 to 90 microns.

7. The display module according to claim 6, characterized in that: The ratio of the thickness of the bending protection layer to the thickness of the polarizer is in the range of 0.2 to 0.

9.

8. The display module according to claim 1, characterized in that: Also includes: The support layer is located on a side of the display panel away from the polarizer, and the support layer includes a first support portion and a second support portion, the first support portion is located in the display area and partially located in the bending area, and the second support portion is located in the binding area.

9. A method for preparing a display module, characterized in that: include: A display panel is provided; wherein the display panel comprises a display area, a binding area, and a bending area located between the display area and the binding area; A polarizer is arranged on one side of the display panel; wherein the polarizer is located in the display area, and a protective film is arranged on a side of the polarizer away from the display panel; A bending protection layer is provided on the same side of the display panel as the polarizer; wherein the bending protection layer is at least located in the bending region, a side of the bending protection layer close to the polarizer contacts the polarizer, and a contact height between the bending protection layer and the polarizer along a direction perpendicular to the plane where the display panel is located is less than or equal to a thickness of the bending protection layer; or, there is a gap between the bending protection layer and the polarizer, and an inclination angle of the bending protection layer close to the polarizer is less than an inclination angle of the side away from the polarizer; Tear off the protective film on the polarizer.

10. The method for preparing a display module according to claim 9, characterized in that: The bending protection layer is provided on the same side of the display panel as the polarizer, comprising: According to the width of the bending area and part of the binding area and the width of a layer of protective glue, the amount of protective glue applied and the coating position of each layer of protective glue are calculated; wherein, along the direction from the binding area to the bending area, the distance between the layer of protective glue with the smallest distance from the polarizer and the polarizer is 40% to 60% of the glue width of the protective glue; Along the direction from the binding area to the bending area, apply a layer of the protective glue at the largest distance from the polarizer to the binding area, pre-cure the protective glue, and apply the remaining protective glue in sequence along the direction close to the polarizer; Attaching a pressing plate to the surface of the plurality of protective adhesives facing away from the display panel, and curing the plurality of protective adhesives with ultraviolet light to form the bending protection layer; The pressing plate attached to the bending protection layer is removed.

11. The method for preparing a display module according to claim 10, characterized in that: The material of the pressing plate includes: fluoroplastics or silicone plastics; wherein the fluoroplastics include polytetrafluoroethylene.

12. The method for preparing a display module according to claim 10, characterized in that: After calculating the amount of protective glue to be applied and locating the coating position of each layer of the protective glue according to the width of the bending area and part of the binding area and the width of a layer of protective glue, coating a layer of the protective glue with the largest distance from the polarizer on the binding area along a direction from the binding area to the bending area to pre-cure the protective glue, and before sequentially coating the remaining protective glue along a direction close to the polarizer, the method further includes: An inert gas is continuously introduced into the preparation environment of the display module, and the protective glue is kept in the inert gas before curing; wherein the inert gas includes nitrogen.

13. A display device, characterized in that: Comprising the display module according to any one of claims 1 to 8.

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