Display panel and display device

Abstract

The application belongs to the technical field of display, and particularly relates to a display panel and a display device. The display panel comprises: a sealing element encapsulated at the outer edge of a substrate; a first reinforcing structure arranged in a black matrix; and a second reinforcing structure arranged in the sealing element. The first reinforcing structure and the second reinforcing structure are configured to be capable of generating adaptive mechanical responses in response to an external magnetic field. The adaptive mechanical response of the first reinforcing structure is used for balancing the deformation of the black matrix when the panel is deformed. The adaptive mechanical response of the second reinforcing structure is used for enhancing the bonding strength of the sealing element to reduce the stress generated at the edge of the display panel when the display panel is deformed. The application can synchronously improve the edge sealing stability and the internal display layer alignment accuracy through the magnetic field response reinforcing structure when the display panel is bent and deformed, thereby improving the problems of sealing failure and display abnormality.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a display panel and display device. Background Technology

[0002] Organic light-emitting display panels typically consist of a substrate, an organic light-emitting layer, and a color resist layer on top of it. COE (Color on Encapsulation) technology directly fabricates a color resist layer containing color filters and a black matrix on top of the encapsulation layer, which is beneficial for achieving thinner and lighter panels.

[0003] However, when such panels are used in flexible devices, their bending deformation can cause two prominent problems: first, the sealing structure at the edges is prone to failure under stress, resulting in reduced packaging reliability; second, relative displacement or deformation may occur between the light-emitting layer and the color resist layer, causing color mixing or visual abnormalities. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and display device that can simultaneously improve edge sealing stability and internal display layer alignment accuracy through a magnetic field response enhancement structure when the display panel is bent and deformed, thereby improving problems such as sealing failure and display abnormalities.

[0005] This application provides a display panel, the display panel including a substrate and an organic light-emitting layer and a color resist layer disposed on the substrate, the color resist layer being disposed on the side of the organic light-emitting layer away from the substrate, and the color resist layer including a plurality of mutually spaced color resists, with a black matrix disposed between adjacent color resists; the display panel further includes: a sealing member encapsulated on the outer edge of the substrate; a first reinforcement structure disposed within the black matrix; and a second reinforcement structure disposed within the sealing member; wherein the first reinforcement structure and the second reinforcement structure are configured to generate an adaptive mechanical response in response to an external magnetic field; the adaptive mechanical response of the first reinforcement structure is used to balance the deformation of the black matrix when the panel deforms; the adaptive mechanical response of the second reinforcement structure is used to enhance the bonding strength of the sealing member to reduce the stress generated at the edges of the display panel when it deforms.

[0006] In one exemplary embodiment of this application, the first reinforcement structure includes magnetorheological fibers distributed within the black matrix, and the volume percentage of the magnetorheological fibers in the black matrix is ​​5% to 10%.

[0007] In one exemplary embodiment of this application, the magnetorheological fibers in the first reinforcing structure are in a woven structure.

[0008] In one exemplary embodiment of this application, the display panel further includes a cover plate disposed opposite to the substrate; the opposite ends of the sealing member are respectively connected to the cover plate and the substrate; the second reinforcing structure includes a magnetorheological material disposed within the sealing member and is located at the contact interface between the sealing member and the substrate and / or the cover plate.

[0009] In one exemplary embodiment of this application, the second reinforcing structure includes a first fiber layer and a second fiber layer. The first fiber layer is disposed on the side of the second fiber layer away from the contact interface, and the second fiber layer extends from the first fiber layer toward the contact interface. The second fiber layer includes magnetorheological fibers.

[0010] In one exemplary embodiment of this application, the height of the first fiber layer is 1 / 2 to 2 / 3 of the total height of the second reinforcing structure, and the height of the second fiber layer is 1 / 3 to 1 / 2 of the total height of the second reinforcing structure.

[0011] In one exemplary embodiment of this application, the second reinforcing structure is a stacked structure with an overall height of not less than 2 micrometers and a width of 60% to 80% of the width of the seal at the contact interface.

[0012] In one exemplary embodiment of this application, the volume fraction of the magnetorheological fiber at the contact interface is 50% to 70%.

[0013] In one exemplary embodiment of this application, the magnetorheological fibers in the first reinforcing structure are configured such that the angle between their principal axis direction and the plane where the substrate is located is less than 10 degrees; and / or the magnetorheological fibers in the second reinforcing structure are configured such that the angle between their principal axis direction and the contact interface is less than 10 degrees.

[0014] A second aspect of this application provides a display device, comprising: a magnetic field control unit; and a display panel as described in any one of the preceding claims, wherein the magnetic field control unit is configured to provide the external magnetic field to the display panel to drive the first reinforcement structure and the second reinforcement structure to generate adaptive mechanical responses, respectively.

[0015] The display panel and display device of this application have at least the following beneficial effects:

[0016] The first reinforcement structure in this application is located within the black matrix and can generate an adaptive mechanical response in response to an external magnetic field. This allows the structure to actively generate reverse stretching and stiffness enhancement when the display panel is bent and deformed, causing the black matrix to be stretched or compressed. This counteracts the passive deformation of the black matrix in real time, effectively maintaining the optical isolation between adjacent color resists and improving display anomalies such as color mixing and uneven brightness caused by interlayer misalignment. Furthermore, the second reinforcement structure is located within the edge seal and also generates an adaptive mechanical response in response to a magnetic field. Through a directionally controllable magnetic field applied by the magnetic field control unit, this structure can generate enhanced shear bonding force and stiffness support at the sealing interface at the moment of display panel deformation. This dynamically enhances the bonding strength of the seal and the overall structural stability, significantly reducing the risk of interface peeling, seal failure, and reliability degradation caused by repeated bending.

[0017] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] Figure 1 The diagram shows a structural schematic of Embodiment 1, in which a first reinforcing structure and a second reinforcing structure are respectively provided in the black matrix and the sealing element.

[0021] Figure 2 The diagram shows the structure of the second reinforcement structure with the cover plate bent inward and outward.

[0022] Figure 3 The diagram shows the structure of the first reinforcement structure under inward and outward bending of the black matrix.

[0023] Figure 4 A schematic diagram of the structure of the magnetorheological fiber forming braid and shear structure provided in this application is shown.

[0024] Figure 5 The diagram shows cross-sectional views of the three enhancement structures provided in Embodiment 2, which are respectively located at different positions in the pixel definition layer.

[0025] Figure 6A schematic diagram of the structure of the magnetorheological fiber forming braid and shear structure provided in Embodiment 2 is shown.

[0026] Explanation of reference numerals in the attached figures: 10. Substrate; 20. Color resist layer; 21. Filter color resist; 22. Black matrix; 30. Cover plate; 40. Seal; 50a. Magnetorheological fiber; 51. First reinforcement structure; 52. Second reinforcement structure; 521. First fiber layer; 522. Second fiber layer; 53. Third reinforcement structure; 54. Fourth reinforcement structure; 55. Fifth reinforcement structure; 551. Third fiber layer; 552. Fourth fiber layer; 60. Subpixel; 70. Pixel definition layer; 710. Pixel definition structure; 711. First groove; 81. First inorganic encapsulation layer; 810. Second groove; 82. Organic encapsulation layer; 83. Second inorganic encapsulation layer; 100. Display panel; 200. Magnetic field control unit; X, First direction; Y, Second direction; Z, Direction perpendicular to the substrate; B, Magnetic field arrow. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0028] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0031] This application provides a flexible display panel and a display device including the panel to improve the technical problems of display abnormalities and edge sealing structure instability caused by deformation of the internal black matrix when the flexible display device is bent. The following will describe the process in detail with reference to the accompanying drawings and two specific embodiments.

[0032] Example 1 This embodiment provides a flexible display panel 100 with adaptive structural reinforcement capabilities. Please refer to [link / reference]. Figure 1 It shows a cross-sectional structural diagram of the display panel 100 in its undeformed state.

[0033] The display panel 100 includes a substrate 10 serving as a support structure. The substrate 10 can be a flexible substrate, such as a polyimide (PI) substrate 10 or other polymer flexible substrates 10. A driving circuit (not shown) is formed on the substrate 10 using a thin-film transistor (TFT) array process, and an organic light-emitting layer is fabricated thereon. The organic light-emitting layer contains a plurality of organic light-emitting diode (OLED) sub-pixel units 60 arranged in a matrix, each unit capable of independently emitting light under the control of the driving circuit.

[0034] Above the organic light-emitting layer, a thin-film encapsulation layer (not shown in the figure) and a color resist layer 20 are sequentially disposed. The color resist layer 20 is fabricated directly on the thin-film encapsulation layer using COE (Color Filter on Encapsulation) technology. The color resist layer 20 includes multiple spaced-apart color filters 21, such as colored resin patterns of red (R), green (G), and blue (B). Light-blocking material is filled between adjacent color filters 21 to form a black matrix 22. The black matrix 22 can absorb stray light between adjacent sub-pixels 60, preventing crosstalk and thus ensuring the purity and high contrast of the displayed colors.

[0035] To achieve overall panel encapsulation and block water and oxygen, sealing elements 40 are provided around the perimeter of the display panel 100. In some embodiments, the display panel 100 further includes a cover plate 30, which is disposed opposite to the substrate 10, and both can be made of flexible transparent materials. The sealing element 40 is located between the substrate 10 and the cover plate 30, and its opposite ends are respectively bonded to the upper surface (or the planarization layer above) of the substrate 10 and the lower surface of the cover plate 30 by curing, forming a closed cavity that protects the internal light-emitting and driving structure.

[0036] In some embodiments, the black matrix 22 and the seal 40 are respectively integrated with a reinforced structure made of smart materials, enabling them to dynamically change their mechanical properties according to external instructions.

[0037] The first reinforcement structure 51 is integrated within the black matrix 22. For example, the first reinforcement structure 51 may include magnetorheological fibers 50a, which are uniformly dispersed in the light-shielding material (such as black photoresist) constituting the black matrix 22. A layered composite process can be used to form the first reinforcement structure 51 within the black matrix 22: first, the magnetorheological fibers 50a are arranged in a stacked manner to form several stacked layers; then, the light-shielding material (such as black photosensitive resin) constituting the black matrix 22 is cast onto the surface and gaps of the stacked magnetorheological fibers 50a, and after curing, a composite structure with an embedded magnetorheological fiber 50a reinforcement network is formed.

[0038] It should be noted that, see Figure 4 As shown, the magnetorheological fiber 50a is a smart material with a structure consisting of a polymer matrix (such as polyurethane or silicone rubber) and a high content (e.g., 70 wt%) of micron-sized soft magnetic particles (such as carbonyl iron powder) uniformly dispersed within it. Through a special spinning process, continuous magnetorheological fibers 50a with a diameter of approximately 57 micrometers and a length reaching the kilometer level can be prepared. The unique feature of this fiber is that its mechanical properties can be controlled in real-time and reversibly by an external magnetic field: in the absence of a magnetic field, the fiber is soft; when a magnetic field of suitable direction and intensity (e.g., a safe weak magnetic field not exceeding 300 mT) is applied, the magnetic particles inside the fiber instantly align along the direction of the magnetic field and form a chain-like structure, causing the fiber's stiffness (or modulus) to increase dramatically (by more than a hundred times), possibly accompanied by macroscopic deformation along a specific direction.

[0039] To ensure that the first reinforcing structure 51 can function effectively without affecting the original light-shielding properties and processability of the black matrix 22, the volume ratio of magnetorheological fiber 50a in the overall black matrix 22 is controlled to be 5% to 10%.

[0040] In an optional embodiment, the stacked magnetorheological fibers 50a can be arranged in a braided structure to form a flexible reinforcement network embedded in the black matrix 22, which helps to distribute the magnetostrictive response more uniformly throughout the entire black matrix 22 region. Furthermore, in the initial state, the main fiber axis of the magnetorheological fibers 50a in the first reinforcement structure 51 is set to be substantially parallel to the plane of the substrate 10 (e.g., at an angle of less than 10 degrees to the plane of the substrate 10 or parallel to the plane). This predetermined axis determines its ability to primarily generate stretching and deformation parallel to the display surface direction under the influence of a magnetic field.

[0041] In other embodiments, to minimize the impact of the addition of magnetorheological fiber 50a on the core light-shielding function of black matrix 22, the magnetic particles in magnetorheological fiber 50a can be made of dark-colored materials with high magnetic permeability (such as black iron oxide). At the same time, the fiber is uniformly dispersed through the above-mentioned layered casting process, so as to ensure excellent light-shielding performance while achieving enhanced function.

[0042] Secondly, the second reinforcing structure 52 is integrated inside the seal 40 and is particularly concentrated at the physical contact interface between the seal 40 and the substrate 10 and / or the cover plate 30, because this is the area where bending stress is concentrated and peeling failure is most likely to occur. The second reinforcing structure 52 also includes the aforementioned magnetorheological fibers 50a.

[0043] Please see Figure 2 This illustrates a specific laminated structure of the second reinforcement structure 52 at the contact interface of the seal 40. The structure is a reinforcement layer with a height of not less than 2 μm. Its width W is designed to be 60% to 80% of the total width Ws of the seal 40 at the contact interface to ensure coverage of the main stress transmission paths.

[0044] The second reinforcement structure 52 comprises two mirror-symmetrical parts (with the centerline of the seal 40 as the mirror plane). This mirror-symmetrical design is based on the mechanical principle that when a flexible panel is bent, the two contact interfaces between the seal 40 and the substrate 10 and cover plate 30 inevitably experience stresses in opposite directions but with similar mechanisms. This design ensures that regardless of whether the panel bends inward or outward, both interfaces receive synchronous and equal reinforcement, jointly resisting peeling and shearing. This provides a complete and balanced reliability guarantee for the entire encapsulation structure, improving upon the situation where one side becomes a failure point due to unilateral reinforcement.

[0045] Furthermore, each portion of the second reinforcing structure 52 comprises two layers: a first fiber layer 521 near the interior of the panel, which mainly consists of mixed yarns and serves as a support base; and a second fiber layer 522 near the contact interface, which is rich in magnetorheological fibers 50a and serves as an active response layer. The magnetorheological fibers 50a in the second fiber layer 522 extend from the first fiber layer 521 toward the contact interface.

[0046] It is worth mentioning that, in terms of height proportion, the height of the first fiber layer 521 is approximately 1 / 2 to 2 / 3 of the height of one side of the entire laminated structure, while the second fiber layer 522 occupies the remaining 1 / 3 to 1 / 2 of the height. Sufficient functional layer thickness ensures that the magnetorheological material can generate sufficiently strong controllable deformation and stiffness response to actively resist stress; simultaneously, the dominant first fiber layer 521 not only provides a stable mechanical foundation for the entire reinforcement structure and efficiently transmits macroscopic strain, but also protects the functional layers from overload damage through its buffering effect; furthermore, this proportion range makes the laminate easy to mold and tightly bond with sealing materials during the encapsulation process, thus ensuring significant reinforcement effects without affecting the original reliability and lifespan of the panel.

[0047] This structural design of the first fiber layer 521 and the second fiber layer 522 ensures that the functional materials are concentrated near the interface where they are most needed. In the contact interface region of this laminated structure, the magnetorheological fiber 50a accounts for as much as 50% to 70% of the volume, thereby ensuring that the region can generate extremely strong bonding force and stiffness when activated by a magnetic field. The magnetorheological fiber 50a in the second reinforcing structure 52 has its main fiber axis set to be substantially perpendicular to and oriented toward the contact interface (e.g., at an angle of less than 10 degrees with the interface normal or coinciding with the interface normal). This axis makes it particularly adept at generating shear stiffness and normal support force against interface separation.

[0048] It should be noted that the height of the second reinforcing structure 52 is limited to not less than 2 μm, based on a comprehensive consideration of material physics, functional requirements, and process compatibility: First, this ensures that a sufficient number of magnetorheological fibers 50a (with diameters on the order of tens of micrometers) can be accommodated and arranged in the designed direction to form an effective volume that can produce significant mechanical property changes under a magnetic field; second, this thickness is a basic requirement to provide sufficient resistance to interfacial shear stress, to compensate for the considerable amount of deformation and stiffness increase in order to compensate for micro-voids; finally, this size matches the typical thickness of the sealant layer in existing panel encapsulation processes, providing the necessary margin for fluctuations in the manufacturing process, thereby ensuring the reliability of its reinforcing function in mass production.

[0049] In some embodiments, the first reinforcing structure 51 and the second reinforcing structure 52 can be fabricated simultaneously with the panel body structure. For example, the first reinforcing structure 51 can be formed by pre-blending the surface-treated magnetorheological fibers 50a with a black matrix 22 photoresist precursor (such as black photosensitive resin), then forming a uniform film by slot coating or spin coating, and then patterning it by exposure and development processes to form a black matrix 22 containing a woven network of magnetorheological fibers 50a. The second reinforcing structure 52 can be fabricated using a pre-film bonding process: first, a flexible reinforcing film with a stacked structure of the first fiber layer 521 and the second fiber layer 522 is prepared, and in the panel encapsulation dispensing process, it is precisely bonded to the sealing area of ​​the substrate 10 and the cover plate 30, and then a sealant is applied and cured, so that the reinforcing film is embedded in the sealant 40 and positioned at the contact interface.

[0050] In other embodiments, the first reinforcing structure 51 and the second reinforcing structure 52 can be independent prefabricated functional structures (e.g., pre-formed films or woven layers containing magnetorheological fibers 50a) that are precisely fitted or embedded into the corresponding positions of the black matrix 22 and the seal 40 during the assembly of the display panel 100.

[0051] Brief description of working principle: When the display panel 100 is in an undeformed state, no external magnetic field is required for activation. The first reinforcing structure 51 and the second reinforcing structure 52 are in a natural and flexible state, without affecting the initial characteristics of the panel. When the display panel 100 begins to bend and deform, a matching magnetic field control unit 200 (see Embodiment 2) will apply a magnetic field in a preset direction to a specific area of ​​the display panel 100 according to the direction of deformation.

[0052] See Figure 3 As shown, for the black matrix 22 region: a magnetic field acts on the first reinforcement structure 51. If the screen is concave and curved, the black matrix 22 is subjected to lateral compression. At this time, the direction of the applied magnetic field is perpendicular to the axis of the magnetorheological fiber 50a. This will mainly drive the magnetorheological fiber 50a to produce outward stretching deformation, while its stiffness is greatly enhanced, thereby actively counteracting the compression trend of the black matrix 22 and stabilizing its width and the gap between adjacent color resistors. If the screen is convex and curved, a magnetic field parallel to the axis of the magnetorheological fiber 50a is applied. At this time, the magnetorheological fiber 50a mainly exhibits strong stiffness enhancement and may produce slight inward contraction to resist the tendency of the black matrix 22 to be stretched.

[0053] See Figure 2As shown, for the sealing element 40 region: a magnetic field acts on the second reinforcing structure 52. If the screen is concave and bent, the interface of the sealing element 40 is subjected to compressive stress. At this time, a magnetic field parallel to the axis of its magnetorheological fiber 50a (i.e., perpendicular to the interface) is applied. The magnetorheological fiber 50a will mainly generate a huge stiffness enhancement, firmly locking the interface and preventing micro-slippage. If the screen is convex and bent, the interface is subjected to tensile stress. At this time, a magnetic field perpendicular to the axis of its magnetorheological fiber 50a is applied. The magnetorheological fiber 50a will simultaneously generate upward shear deformation and stiffness enhancement. The deformed part can fill the micro-gaps that may be generated by stretching, while the enhanced stiffness provides strong tensile strength.

[0054] Through the above mechanism, when the display panel 100 of this embodiment is bent, the built-in intelligent enhancement structure can generate just the right mechanical response through the precise control of the external magnetic field, thereby simultaneously stabilizing the internal display optical performance and improving the reliability of the edge packaging structure.

[0055] Example 2 See Figure 5 and Figure 6 As shown, this second embodiment provides another flexible display panel 100 with adaptive structural reinforcement capability. The technical concept is to actively regulate and optimize the internal stress distribution of the display panel 100 in a bent or rolled state by setting pixel-level reinforcement structures in different directions.

[0056] Please see Figure 5 and Figure 6 In this embodiment, the display panel 100 is constructed based on a flexible substrate 10 (such as polyimide PI). A thin-film transistor (TFT) array layer, an anode, a pixel definition layer 70 (PDL), an organic light-emitting layer (OLED), a cathode, and a thin-film encapsulation (TFE) layer are sequentially formed on the substrate 10. This embodiment also includes a plurality of sub-pixels 60 arranged in an array on the substrate 10, and a reinforcement structure system capable of responding to an external magnetic field and actively changing its mechanical properties.

[0057] In some embodiments, see Figure 5 and Figure 6 As shown, the enhancement structure system includes a third enhancement structure 53 and a fourth enhancement structure 54. The third enhancement structure 53 is disposed between adjacent sub-pixels 60 arranged along a first direction X (e.g., row direction X). The fourth enhancement structure 54 is disposed between adjacent sub-pixels 60 arranged along a second direction Y (e.g., column direction Y). The first direction X and the second direction Y intersect in the plane of the substrate 10.

[0058] The third reinforcement structure 53 and the fourth reinforcement structure 54 are both configured to respond to an externally applied magnetic field, thereby changing their mechanical properties to reduce the deformation of the display panel 100 along the first direction X and the second direction Y, respectively.

[0059] In some embodiments, the pixel definition layer 70 has a pixel definition structure 710 located between adjacent sub-pixels 60. A third enhancement structure 53 is integrated inside the pixel definition structure 710 extending along a first direction X, and a fourth enhancement structure 54 is integrated inside the pixel definition structure 710 extending along a second direction Y.

[0060] In some embodiments, both the third reinforcing structure 53 and the fourth reinforcing structure 54 include a reinforcing fiber braid. This braid may be made of magnetorheological fiber 50a (whose material properties are the same as those of the magnetorheological fiber 50a described in Embodiment 1, which may be briefly described or referenced herein). In the third reinforcing structure 53, the main fiber extension direction of the braid is parallel to the first direction X; in the fourth reinforcing structure 54, the main fiber extension direction of the braid is parallel to the second direction Y.

[0061] Please see Figure 6 When the applied magnetic field is perpendicular to the fiber axis, the fiber can rapidly undergo significant macroscopic bending deformation and simultaneously stiffen. When the applied magnetic field is parallel to the fiber axis, the fiber primarily exhibits strong stiffening capabilities. By controlling the direction of the magnetic field, pixel-level reinforcement structures can be precisely instructed to operate in different modes, thereby specifically resisting in-plane deformations of different natures.

[0062] In order to achieve a balance between enhancing the effect and maintaining the flexibility of the pixel definition structure 710, the volume fill density of the reinforcing fiber braid in the third reinforcing structure 53 and the fourth reinforcing structure 54 within the pixel definition structure 710 can be controlled between 10% and 30%.

[0063] In some embodiments, to further improve the structural stability of the panel in the thickness direction (Z direction), the display panel 100 further includes an encapsulation layer and a fifth reinforcement structure 55 disposed within the encapsulation layer. The encapsulation layer includes a first inorganic encapsulation layer 81, an organic encapsulation layer 82, and a second inorganic encapsulation layer 83 stacked together. The fifth reinforcement structure 55 is disposed in the central region surrounded by four adjacent sub-pixels 60. This structure is also configured to respond to a magnetic field to change its mechanical properties, thereby reducing the deformation of the display panel 100 in the direction perpendicular to the substrate 10.

[0064] See Figure 5As shown, the fifth reinforcement structure 55 can be configured in a more refined manner. For example, a first groove 711 can be pre-formed on the pixel definition structure 710. A second groove 810 is formed on the first inorganic encapsulation layer 81 corresponding to the position of the first groove 711. The fifth reinforcement structure 55 may include a reinforcement fiber composite. The composite includes a third fiber layer 551 and a fourth fiber layer 552 inserted therein. The third fiber layer 551 fills and covers the entire bottom surface of the second groove 810. The magnetorheological fibers 50a in the fourth fiber layer 552 can extend upward from the third fiber layer 551 into the organic encapsulation layer 82, forming a reinforcement network capable of resisting Z-axis shear.

[0065] Understandably, the core function of the third reinforcement structure 53 and the fourth reinforcement structure 54 is to provide directional and adjustable mechanical suppression for the in-plane deformation of the display panel 100 in the row direction (X direction) and column direction (Y direction), respectively. When the panel bends along the X direction, the third reinforcement structure 53 located in the X direction becomes key to stress control. By applying a magnetic field in a specific direction, its working mode can be controlled: if a magnetic field perpendicular to its main fiber axis (X direction) is applied, the main fiber will produce significant bending deformation and synchronous stiffening. This active bending can actively adapt to or counteract the bending curvature of the panel, and the increased stiffness can effectively lock further relative displacement of pixels in this area; if a magnetic field parallel to its main fiber axis is applied, the main fiber mainly exhibits a dramatic increase in stiffness (the modulus can be increased by more than a hundred times), thereby providing strong tensile or compressive resistance in the axial direction, directly resisting pixel gap changes caused by bending. The fourth reinforcement structure 54 works on the same principle and is specifically used to suppress in-plane deformation in the Y direction. Through this precise control with directional correspondence and selectable modes, the panel can obtain instantaneous and directional mechanical support at the deformation point when it deforms in any in-plane direction. This effectively disperses and neutralizes localized concentrated stress, fundamentally improving the micro-strain mismatch and potential film failure risk caused by the mismatch of elastic moduli of each layer of material.

[0066] The fifth reinforcing structure 55 focuses on addressing the interlayer stress problem generated in the thickness direction (Z direction) during panel bending, particularly improving shear slip and delamination tendencies between encapsulation layers. Its working principle utilizes its unique vertically or obliquely extending fiber structure. When panel bending causes interlayer shear stress, a magnetic field perpendicular to the plane of the substrate 10 (Z direction) or matching the fiber extension direction is applied to this area. At this time, the magnetorheological fibers 50a abundant in the fourth fiber layer 552 instantly stiffen, and their huge stiffness increment translates into a strong shear modulus, like countless miniature rigid anchors inserted between layers, firmly locking the upper and lower layers (such as the first inorganic encapsulation layer 81 and the organic encapsulation layer 82). Simultaneously, the slight axial expansion and contraction that some fibers may undergo under the magnetic field inducement can actively fill the microscopic interface voids that may be generated due to deformation. The third fiber layer 551 serves as a stable substrate, ensuring that stress can be uniformly transmitted throughout the reinforcement. In this way, the fifth reinforcement structure 55 effectively maintains the structural integrity of the package stack, preventing interlayer peeling and reliability degradation caused by repeated bending.

[0067] In summary, this embodiment achieves intelligent suppression of in-plane (XY plane) deformation through the third and fourth reinforcement structures 54, and strengthens interlayer (Z direction) stability through the fifth reinforcement structure 55. Together, these three structures constitute a multi-dimensional, active control system for the internal stress of the flexible display panel 100. When used in conjunction with the magnetic field control unit 200, this system can dynamically adjust the mechanical properties of each reinforcement structure according to the real-time deformation state, enabling the panel to actively adapt to and counteract deformation, thereby maintaining excellent structural stability and display reliability even under complex deformation.

[0068] Example 3 This embodiment provides an integrated intelligent display device, which adopts a full-function composite display panel 100 that integrates the technical features of Embodiment 1 and Embodiment 2, and is equipped with a multi-region magnetic field control unit 200 that works in conjunction with it. The core of this device is that, through a unified intelligent control center, the enhancement structures for different regions such as pixels, black matrix 22 and edge sealing are integrated into a set of mechanical control networks that can respond synchronously and work in concert.

[0069] See Figure 6 As shown, the display device may include a display panel 100, a magnetic field control unit 200, and a controller.

[0070] The display panel 100 integrates a pixel-level enhancement network (third, fourth, and fifth enhancement structures 55), a black matrix 22 enhancement structure (first enhancement structure 51), and an edge-sealing enhancement structure (second enhancement structure 52). The pixel-level enhancement network (including the third and fourth enhancement structures 54 along the X and Y directions and the fifth enhancement structure 55 located at the pixel intersection) is responsible for maintaining in-plane deformation stability and interlayer bonding; the first enhancement structure 51 within the black matrix 22 is used to dynamically compensate for the deformation of the color resist layer 20 to maintain color purity; and the edge-sealing second enhancement structure 52 is dedicated to strengthening the encapsulation boundary to prevent peeling failure. These three enhancement structures are constructed based on the same magnetorheological smart material, laying the foundation for unified magnetic field control.

[0071] The magnetic field control unit 200 may include multiple independently programmable arrays of miniature electromagnetic coils or magnetic poles, arranged to precisely correspond to the different functional reinforcement structural areas on the panel. This enables the controller to apply magnetic fields with specific direction, intensity, and timing to specific areas of the panel (such as the black matrix 22 in a bend or the edge seal 40 on one side of the panel), achieving precise localized actuation.

[0072] The controller is pre-configured with a rich set of collaborative control strategies. It first receives signals from various sensors (such as strain, angle, and acceleration) to determine the overall deformation mode and stress distribution of the display panel 100 in real time. Then, instead of simply activating various reinforcement structures independently, it executes a global optimization strategy. For example, when the panel undergoes an inward bend, the controller simultaneously commands: (a) To the edge sealing reinforcement structure on the inner side of the bend: apply a strong magnetic field (i.e., a Z-axis magnetic field) perpendicular to the bonding interface to maximize the stiffness of the magnetorheological fibers 50a inside, resisting the tendency to peel off due to compression. (b) To the black matrix 22 reinforcement structure within the same bend area: since the main axis direction of its internal magnetorheological fibers 50a is preset to be parallel to the plane of the substrate 10, a horizontal magnetic field within the panel plane and perpendicular to the fiber axis should be applied. The magnetic field drives the magnetorheological fiber 50a to undergo axial expansion deformation and simultaneously increase its stiffness, thereby actively counteracting the in-plane compressive strain experienced by the black matrix 22 during inward folding and preventing optical crosstalk caused by the reduction in the gap of the color filter 21; at the same time, (c) a corresponding magnetic field is applied to the pixel-level enhancement structure in this area to stabilize the pixel array. This strategy ensures that all mechanically weak points from the panel edge to the display core receive synchronous and matched reinforcement when deformation occurs.

[0073] Through this coordinated, directional, and intelligently adaptable magnetic field drive, the display device enables the display panel 100 to actively sense, dynamically adapt, and counteract the adverse effects of deformation. This not only significantly improves the image consistency and visual experience of flexible display products in a bent state, but also greatly enhances their mechanical reliability and service life, providing an innovative and comprehensive technical solution for achieving thinner, more durable, and smarter foldable and rollable display devices.

[0074] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A display panel, the display panel comprising a substrate and an organic light-emitting layer and a color resist layer disposed on the substrate, the color resist layer being disposed on the side of the organic light-emitting layer away from the substrate, and the color resist layer comprising a plurality of color filter color resists disposed at intervals therebetween, with a black matrix provided between adjacent color filter color resists; characterized in that, The display panel also includes: A sealing element is encapsulated on the outer edge of the substrate; The first enhancement structure is located within the black matrix; A second reinforcing structure is provided within the seal; The first and second reinforcement structures are configured to generate an adaptive mechanical response in response to an external magnetic field; the adaptive mechanical response of the first reinforcement structure is used to balance the deformation of the black matrix when the panel deforms; the adaptive mechanical response of the second reinforcement structure is used to enhance the bonding strength of the seal to reduce the stress generated at the edges of the display panel when it deforms.

2. The display panel according to claim 1, characterized in that, The first reinforcement structure includes magnetorheological fibers distributed within the black matrix, and the volume percentage of the magnetorheological fibers in the black matrix is ​​5% to 10%.

3. The display panel according to claim 2, characterized in that, The magnetorheological fibers in the first reinforcing structure are in a woven structure.

4. The display panel according to claim 2, characterized in that, The display panel further includes a cover plate, which is disposed opposite to the substrate; the two opposite ends of the sealing member are respectively connected to the cover plate and the substrate; The second reinforcement structure includes a magnetorheological material disposed within the seal and located at the contact interface between the seal and the substrate and / or the cover plate.

5. The display panel according to claim 4, characterized in that, The second reinforcing structure includes a first fiber layer and a second fiber layer. The first fiber layer is disposed on the side of the second fiber layer away from the contact interface. The second fiber layer extends from the first fiber layer toward the contact interface and includes magnetorheological fibers.

6. The display panel according to claim 5, characterized in that, The height of the first fiber layer is 1 / 2 to 2 / 3 of the total height of the second reinforcing structure, and the height of the second fiber layer is 1 / 3 to 1 / 2 of the total height of the second reinforcing structure.

7. The display panel according to claim 4, characterized in that, The second reinforcing structure is a laminated structure with an overall height of not less than 2 micrometers and a width of 60% to 80% of the width of the seal at the contact interface.

8. The display panel according to claim 7, characterized in that, At the contact interface, the volume fraction of the magnetorheological fiber is 50% to 70%.

9. The display panel according to claim 4, characterized in that, The magnetorheological fibers in the first reinforcement structure are configured such that the angle between their main axis direction and the plane of the substrate is less than 10 degrees; and / or the magnetorheological fibers in the second reinforcement structure are configured such that the angle between their main axis direction and the contact interface is less than 10 degrees.

10. A display device, characterized in that, include: Magnetic field control unit; as well as The display panel according to any one of claims 1 to 9, wherein the magnetic field control unit is configured to provide the external magnetic field to the display panel to drive the first enhancement structure and the second enhancement structure to generate adaptive mechanical responses, respectively.

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