Display module and display device
By setting raised protrusions on the second backplate of the flexible OLED display, the module structure and manufacturing process are simplified, solving the problem of complex BP design in the prior art and improving stability and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD
- Filing Date
- 2023-09-22
- Publication Date
- 2026-06-30
AI Technical Summary
In the bending design of existing flexible OLED displays, the BP design is complex and requires the addition of stiffener support, which leads to complex module structure and manufacturing process.
The raised boss and the second back plate are integrally molded to replace the stiffener, simplifying the module structure and process, and ensuring the bending radius shape.
By increasing the height of the boss, the structure and manufacturing process of the display module are simplified, stability and production efficiency are improved, while maintaining the shape of the curved section.
Smart Images
Figure CN117475767B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, specifically to a display module and display device. Background Technology
[0002] In flexible organic electroluminescence (OLED) displays, due to design requirements, the display panel or flexible printed circuit (FPC) in the bottom bezel area needs to be bent to increase the screen display area. The BP (back plane) design in existing flexible panels is mostly two-section. In the pad bending process, in order to ensure the bending radius (R-angle) shape, a stiffener is usually added at the position corresponding to the second BP section for support, which makes the structure and manufacturing process complex. Summary of the Invention
[0003] This application provides a display module and display device that can simplify the module structure and manufacturing process of the display module while maintaining the bent R-angle shape.
[0004] In a first aspect, embodiments of this application provide a display module, including:
[0005] A panel body includes a base, the base having a display segment, a bonding segment, and a bending segment, the bonding segment being bent through the bending segment to the back side of the base and disposed opposite to the display segment; and...
[0006] The back panel assembly includes a first back panel and a second back panel. The first back panel and the second back panel are respectively disposed on two opposing surfaces of the display segment and the bonding segment. The first back panel and the second back panel have the same thickness. A raised boss protrudes from one side surface of the second back panel facing the first back panel. The raised boss is integrally formed with the second back panel.
[0007] In one embodiment, the second back plate extends outward from one side of the first back plate to form the raising boss, which completely covers the second back plate.
[0008] In one embodiment, the edge of the raised boss extends outward and extends beyond the edge of the second back plate.
[0009] In one embodiment, a portion of the second back plate's surface facing the first back plate extends protruding toward the first back plate to form the raised boss.
[0010] In one embodiment, the display module is a foldable display module;
[0011] The display module further includes a rigid support layer, which is sandwiched between the first back plate and the second back plate;
[0012] The first back plate is bonded to the rigid support layer by pressure-sensitive adhesive;
[0013] The heightening boss is bonded to the rigid support layer using foam adhesive or double-sided adhesive.
[0014] In one embodiment, the rigid support layer is made of one of stainless steel, aluminum alloy, and carbon fiber.
[0015] In one embodiment, the display module is a non-foldable display module;
[0016] The display module also includes an ultra-clean foam composite film, which is sandwiched between the first back plate and the second back plate;
[0017] The raised protrusion is bonded to the ultra-clean foam composite film with foam adhesive.
[0018] In one embodiment, from the direction of the first back plate to the second back plate, the ultra-clean foam composite membrane includes an adhesive layer, a foam layer, a polyimide layer and a metal layer stacked sequentially.
[0019] The adhesive layer is bonded to the first back plate;
[0020] The metal layer is bonded to the raised boss using foam adhesive.
[0021] In one embodiment, the surface of the raised boss facing the first back plate is roughened.
[0022] Secondly, embodiments of this application also provide a display device, which includes the display module described above.
[0023] Beneficial effects: The display module provided in this application includes a panel body and a back panel assembly. The panel body includes a base, which has a display segment, a bonding segment, and a bending segment. The back panel assembly includes a first back panel disposed on the display segment and a second back panel disposed on the bonding segment. A raising boss protrudes from one side of the second back panel facing the first back panel. The raising boss is integrally formed with the second back panel and is used to raise the second back panel, thereby increasing the overall thickness of the second back panel to ensure the bending radius of the bending segment. Furthermore, since the raising boss is integrally formed with the second back panel, replacing the existing stiffener with the raising boss simplifies the module structure and manufacturing process while ensuring the bending radius of the bending segment. Attached Figure Description
[0024] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.
[0025] Figure 1 This is a schematic diagram of an existing display module;
[0026] Figure 2 This is a schematic diagram of the structure of the display module provided in the embodiments of this application;
[0027] Figure 3 for Figure 2 A structural diagram of the back panel assembly (in a flat, unassembled state). Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0029] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only, and features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or it can include situations where the first and second features are not in direct contact. Furthermore, "above," "over," and "on top" of the second feature simply indicate that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "below" of the second feature simply indicate that the first feature is at a lower horizontal level than the second feature.
[0032] In a first aspect, embodiments of this application provide a display module 100, which can be a display module 100 for smartphones, tablets, displays, etc. Please refer to... Figure 2 and Figure 3The display module 100 includes a panel body 1 and a back panel assembly 2. The panel body 1 includes a base 11, which has a display segment 11a, a binding segment 11b, and a bending segment 11c. The binding segment 11b is bent to the back side of the base 11 via the bending segment 11c and is disposed opposite to the display segment 11a. The back panel assembly 2 includes a first back panel 21 and a second back panel 22. The first back panel 21 and the second back panel 22 are respectively disposed on two opposite surfaces of the display segment 11a and the binding segment 11b. The first back panel 21 and the second back panel 22 have the same thickness. A raised boss 23 protrudes from the side surface of the second back panel 22 facing the first back panel 21. The raised boss 23 is integrally formed with the second back panel 22.
[0033] Please see Figure 1 In the existing display module 100', there are a display segment 11a', a bonding segment 11b', and a bending segment 11c'. The first segment BP (first backplate) 21' corresponds to the display segment 11a', and the second segment BP (second backplate) 22' corresponds to the bonding segment 11b'. In the pad bending process, in order to ensure the bending R-angle shape, an auxiliary material stiffener 23' is usually added at the position corresponding to the second segment BP (second backplate) 22', thereby increasing the complexity of the module structure and process. In this application, the second backplate 22 has the raised boss 23. By setting the raised boss 23 to replace the existing stiffener, the module structure and process can be simplified while ensuring the bending R-angle shape of the bending segment 11c.
[0034] It is understood that the first back plate 21 and the second back plate 22 are usually made of polyethylene terephthalate (PET). Since the raised boss 23 is integrally formed with the second back plate 22, the material of the raised boss 23 is the same as that of the second back plate 22.
[0035] This application does not limit the specific form of the heightening boss 23. It can be a portion of the surface of the second back plate 22 facing the first back plate 21 that protrudes and extends toward the first back plate 21; or the entire surface of the second back plate 22 facing the first back plate 21 protrudes and extends toward the first back plate 21.
[0036] In one embodiment, please refer to further details. Figure 2The second back plate 22 extends outward from the first back plate 21 on one side to form the raised boss 23, which completely covers the second back plate 22. This configuration further simplifies the manufacturing process of the second back plate 22 and the raised boss 23, making production easier.
[0037] Understandably, based on the existing structure of the display module 100, the bonding segment 11b has a first end away from the curved segment 11c; wherein the second back plate 22 and the raising protrusion 23 are disposed close to the first end. In some embodiments, the edge of the raising protrusion 23 extends outward and beyond the edge of the second back plate 22, that is, the raising protrusion 23 and the second back plate 22 form a "T" shaped structure, thereby increasing the contact area between the raising protrusion 23 and the rigid support layer 3 and improving the stability of the display module 100.
[0038] In some embodiments, the display module 100 is a foldable display module; the display module further includes a rigid support layer 3, which is sandwiched between the first back plate 21 and the second back plate 22; the first back plate 21 is bonded to the rigid support layer 3 by pressure-sensitive adhesive; the raising boss 23 is bonded to the rigid support layer 3 by foam adhesive. By providing the rigid support layer 3, a rigid support function is provided for the panel body 1 to maintain the surface flatness of the display segment 11a.
[0039] In another embodiment, the raised boss 23 can also be bonded to the rigid support layer 3 by double-sided adhesive.
[0040] Specifically, the rigid support layer 3 is made of one of stainless steel, aluminum alloy, and carbon fiber.
[0041] The display module 100 further includes a buffer layer sandwiched between the first back plate 21 and the rigid support layer 3. Specifically, the buffer layer can be made of foam to provide cushioning for the display module 100. When the display module 100 is subjected to external force, it can buffer the external force and thus prevent the display module 100 from being damaged.
[0042] In other embodiments, the display module 100 is a non-foldable display module; the display module 100 further includes a super clean foam composite film sandwiched between the first back plate 21 and the second back plate 22; the raised boss 23 is bonded to the super clean foam composite film with foam adhesive. By providing an SCF composite film (Super Clean Foam) between the first back plate 21 and the second back plate 22 to buffer external forces, the bonding pressure during the bonding process of the display module 100 can be prevented from damaging the display module 100.
[0043] In another embodiment, the raised protrusion 23 can also be bonded to the ultra-clean foam composite film by double-sided adhesive.
[0044] Furthermore, from the first backplate 21 to the second backplate 22, the ultra-clean foam composite film includes an adhesive layer, a foam layer, a polyimide layer, and a metal layer stacked sequentially; wherein, the adhesive layer is bonded to the first backplate; the metal layer is bonded to the raised protrusions via foam adhesive. The adhesive layer can be an embo adhesive, which has the function of adhering and venting, and is flexible, so as not to affect the flexible design of the display module 100. In other embodiments, the adhesive layer can be other adhesive layers. The foam layer can be foam, which can both buffer and block light. The polyimide layer can play a reinforcing role and increase the reliability of the SCF; in other embodiments, the SCF may not include the polyimide layer; and the polyimide layer can also be replaced by a graphite layer, the outer surface of which can be coated with polyimide. The metal layer can be made of copper, aluminum, or an alloy structure thereof, and the metal layer can play a heat dissipation role; the metal layer can be copper foil or aluminum foil.
[0045] Understandably, please refer to Figure 3 When the first back plate 21 and the second back plate 22 are not installed on the face body, a release film 5 is attached to the first back plate 21 and the second back plate 22 to protect the adhesive on the first back plate 21 and the second back plate 22. During the manufacturing process, the release film 5 can be directly peeled off, and the first back plate 21 and the second back plate 22 can be respectively attached to the display segment 11a and the binding segment 11b, which is simple to operate.
[0046] In one embodiment, the materials of the first back plate 21 and the second back plate 22 may be polyethylene terephthalate (PET) or polyimide (PI), but are not limited thereto; the materials of the first back plate 21 and the second back plate 22 may be the same or different. Materials that can provide a certain supporting effect for the panel body 1 are all within the protection scope of this application, and the supporting effect does not affect the deformation of the panel body 1 under stress in this application.
[0047] Furthermore, in order to ensure the adhesion between the second back plate 22 and the rigid support layer 3 or the ultra-clean foam composite film, in one embodiment of this application, the surface of the raising protrusion 23 facing the first back plate is roughened. Setting the surface of the raising protrusion 23 as roughened can increase the adhesion between the raising protrusion 23 and the rigid support layer 3 or the ultra-clean foam composite film, thereby making the adhesion between the second back plate 22 and the rigid support layer 3 or the ultra-clean foam composite film more stable.
[0048] In one embodiment, the panel body 1 further includes a display function layer 12, which is disposed on the light-emitting side of the display segment 11a.
[0049] Meanwhile, the substrate 11 includes a PI film layer 111 and a TFT substrate 112 stacked together; wherein, the display functional layer 12 is disposed on the side of the TFT substrate 112 away from the PI film layer 111.
[0050] In one embodiment, the display functional layer 12 includes an OLED structure disposed on the TFT substrate 112.
[0051] This application does not limit the specific configuration of the OLED structure. Preferably, the OLED structure is disposed on the TFT substrate 112 by thin film encapsulation.
[0052] In one embodiment, the display module 100 further includes a driving unit 4, which is located on the side of the bonding segment 11b away from the display segment 11a and is electrically connected to the bonding segment 11b.
[0053] Secondly, embodiments of this application also provide a display device, which includes a display module 100. It should be noted that the display module 100 is configured as described above. That is, the display module 100 has all the embodiments of the display module 100 described above, and the display device also has all the technical features of all the embodiments of the display module 100 described above, and thus has all the beneficial effects brought about by all the technical features. These will not be elaborated here.
[0054] For the specific structure of the display module 100 and the display back panel, please refer to any of the above-mentioned embodiments and drawings of the display module 100 and the display back panel, which will not be repeated here.
[0055] In this embodiment, the display device may further include a mid-frame, frame adhesive, etc., and the display device may be a display terminal such as a mobile phone, watch, tablet, or television, which is not limited here.
[0056] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0057] The above provides a detailed description of a display module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A display module, characterized in that, include: A panel body includes a base, the base having a display segment, a bonding segment, and a bending segment, the bonding segment being bent through the bending segment to the back side of the base and disposed opposite to the display segment; and... The backplate assembly includes a first backplate and a second backplate, which are respectively disposed on two opposing surfaces of the display segment and the bonding segment. The first backplate and the second backplate have the same thickness. A raised boss protrudes from one side of the second backplate facing the first backplate. The raised boss is integrally formed with the second backplate. The raised boss is in direct contact with the film layer corresponding to the display segment through an adhesive layer.
2. The display module as described in claim 1, characterized in that, The second back plate extends outward from one side of the first back plate to form the raised boss, which completely covers the second back plate.
3. The display module as described in claim 2, characterized in that, The edge of the raised boss extends outward and is positioned beyond the edge of the second back plate.
4. The display module as described in claim 1, characterized in that, The second back plate extends outward from one side of its surface facing the first back plate to form the raised boss.
5. The display module as described in claim 1, characterized in that, The display module is a foldable display module; The display module further includes a rigid support layer, which is sandwiched between the first back plate and the second back plate; The first back plate is bonded to the rigid support layer by pressure-sensitive adhesive; The heightening boss is bonded to the rigid support layer using foam adhesive or double-sided adhesive.
6. The display module as described in claim 5, characterized in that, The rigid support layer is made of one of stainless steel, aluminum alloy, and carbon fiber.
7. The display module as described in claim 1, characterized in that, The display module is a non-folding display module; The display module also includes an ultra-clean foam composite film, which is sandwiched between the first back plate and the second back plate; The raised protrusion is bonded to the ultra-clean foam composite film with foam adhesive.
8. The display module as described in claim 7, characterized in that, From the direction of the first back plate to the second back plate, the ultra-clean foam composite membrane includes an adhesive layer, a foam layer, a polyimide layer and a metal layer stacked in sequence. The adhesive layer is bonded to the first back plate; The metal layer is bonded to the raised boss using foam adhesive.
9. The display module as described in claim 1, characterized in that, The surface of the raised boss facing the first back plate is roughened.
10. A display device, characterized in that, Includes the display module as described in any one of claims 1-9.