Display panel and display

Abstract

The invention provides a display panel and a display. An auxiliary electrode layer is newly added in the display panel, the auxiliary electrode layer comprises a plurality of main auxiliary parts made of a wrinkled organic metal framework material (MOF), and the main auxiliary parts are used for connecting adjacent electrode parts. According to the wrinkled MOF material, the stability of the structure of the wrinkled MOF material can still be guaranteed under large deformation, and the wrinkled MOF material has good conductivity. When the display panel is curled and deformed, the main auxiliary part can be stretched to disperse surface internal stress, and when the second electrode layer is broken at the connecting position of the electrode part and the connecting part due to multiple times of bending, the main auxiliary part can still ensure the connection of the adjacent electrode parts, that is, the overall conductive effect of the second electrode layer can still be ensured; therefore, the uniformity of signals in the second electrode layer is ensured, normal display of the display panel is ensured, and the use experience of the display panel is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode), as a self-emitting display technology, is increasingly widely used in products. Since OLED can be fabricated on a flexible substrate, flexible OLED has become a major advantage of OLED products. Stretching and curling, as two practical applications of flexibility, have also attracted much attention.

[0003] Generally, an OLED product with curling ability needs to have a large flexible deformation ability. Each component inside the display panel needs to have large elasticity and toughness to ensure the stability of its own structure after multiple deformations. In an OLED-based display panel, the cathode, as the display electrode material, the stability of its structure is related to the stability of the entire screen during and after curling. Since in the flexible OLED manufacturing process, an isolation structure is required for the partition of the light-emitting unit, the cathode needs to be deposited on the isolation structure. However, since the cathode itself is a metal compound and does not have flexibility and has limited toughness, it is prone to film layer fracture and peeling at the ramp position with the isolation structure after curling, resulting in damage to the film layer of the cathode. When the film layer of the cathode is damaged, its surface uniformity will be severely affected, resulting in abnormal phenomena such as uneven display. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a display panel and a display device.

[0005] According to the first aspect of the embodiments of the present disclosure, a display panel is provided, including:

[0006] A driving backplane;

[0007] A pixel definition layer, on one side surface of the pixel definition layer away from the driving backplane, a plurality of isolation structures are formed, and a plurality of pixel openings are surrounded by the plurality of isolation structures;

[0008] A plurality of sub-pixels, including a plurality of first electrodes, a plurality of light-emitting units, and a second electrode layer stacked in the plurality of pixel openings;

[0009] The second electrode layer includes a plurality of electrode portions and a plurality of connection portions that are connected and arranged at intervals. The plurality of electrode portions correspond to the plurality of light-emitting units, and the plurality of connection portions correspond to the plurality of isolation structures;

[0010] Wherein, the display panel further includes an auxiliary electrode layer, and the auxiliary electrode layer includes a plurality of main auxiliary parts made of a wrinkled organic metal frame material, and the main auxiliary parts are used to connect adjacent electrode parts.

[0011] In an optional embodiment, the auxiliary electrode layer is located on a side of the second electrode layer away from the driving backplane.

[0012] In an optional embodiment, a plurality of the main auxiliary parts correspond to a plurality of the connecting parts, and the corresponding main auxiliary parts cover the connecting parts.

[0013] In an optional embodiment, the auxiliary electrode layer further includes a plurality of sub-auxiliary parts made of a flat organic metal frame material. The plurality of sub-auxiliary parts are arranged alternately with the plurality of main auxiliary parts, and adjacent sub-auxiliary parts and main auxiliary parts are connected; wherein, the plurality of sub-auxiliary parts correspond to the plurality of electrode parts one by one, and the corresponding sub-auxiliary parts cover the electrode parts.

[0014] In an optional embodiment, the isolation structure includes a stepped ramp structure. The stepped ramp structure is located on a side of the light-emitting unit away from the driving backplane, and the connecting part adheres to the ramp structure of the isolation structure and a surface of the isolation structure away from the driving backplane, and the main auxiliary part adheres to a side of the connecting part away from the isolation structure, so that the connecting part and the main auxiliary part are both configured as stepped ramps.

[0015] In an optional embodiment, at least one step surface of the stepped ramp structure is provided with a first recess, and the first recess is recessed from the step surface towards the direction of the driving backplane.

[0016] In an optional embodiment, the auxiliary electrode layer is located within the pixel definition layer.

[0017] In an optional embodiment, a plurality of the main auxiliary parts correspond to a plurality of the isolation structures, and the main auxiliary parts penetrate through the isolation structures to connect adjacent electrode parts.

[0018] In an optional embodiment, positions of the main auxiliary parts in the isolation structure include a plurality of second recesses, and the second recesses are recessed from the main auxiliary parts towards the direction of the driving backplane of the isolation structure.

[0019] According to a second aspect of the embodiments of the present disclosure, a display is provided. The display includes a control circuit board and the display panel according to any one of the first aspect, and the control circuit board is electrically connected to the display panel for controlling the display panel to display a corresponding picture.

[0020] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: In the present disclosure, the display panel includes a driving backplane and a pixel definition layer arranged in a stacked manner. On the surface of the pixel definition layer away from the driving backplane, a plurality of isolation structures are formed. The plurality of isolation structures enclose a plurality of pixel openings. A plurality of first electrodes, a plurality of light-emitting units, and a second electrode layer stacked in the plurality of pixel openings constitute a plurality of sub-pixels. The light-emitting units emit light through the electric field between the first electrode and the second electrode layer. That is, the isolation structures are located between two adjacent light-emitting units to isolate the light-emitting units and prevent short circuits between the light-emitting units, ensuring that each light-emitting unit can work normally. In addition, due to the existence of the isolation structures, the second electrode layer may include a plurality of electrode portions and a plurality of connection portions that are connected and spaced apart, and the plurality of electrode portions correspond to the plurality of light-emitting units, and the plurality of connection portions correspond to the plurality of isolation structures. Based on the above structure, when the display panel of the related art is bent, the film layer of the second electrode layer is easily broken and peeled off at the climbing position of the isolation structure. That is, the film layer is easily broken and peeled off at the connection position between the electrode portion and the connection portion, thereby affecting the display effect of the entire display panel. In this application, an auxiliary electrode layer is newly added to the display panel, and the auxiliary electrode layer includes a plurality of main auxiliary portions made of a wrinkled organic metal framework material (MOF). The main auxiliary portions are used to connect adjacent electrode portions. This wrinkled MOF material (which can also be called wrinkled MOFs material (MOFs is the plural form of MOF)) can ensure the stability of its own structure under large deformations and has good conductivity. When the display panel undergoes a curling deformation, the main auxiliary portions will be stretched accordingly to disperse the in-plane stress. And when the second electrode layer breaks at the connection position between the electrode portion and the connection portion due to multiple bends, the main auxiliary portions can still ensure the connection of adjacent electrode portions, that is, still ensure the overall conductivity of the second electrode layer, thereby ensuring the uniformity of the signals in the second electrode layer, and thus ensuring the normal display of the display panel and improving the use experience of the display panel.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0023] Figure 1 It is a schematic partial structure diagram of a display panel shown according to an exemplary embodiment.

[0024] Figure 2It is a schematic diagram of a partial structure of a display panel shown according to an exemplary embodiment (sub-pixels are not shown in the figure).

[0025] Figure 3 It is a schematic diagram of the structure of a display panel shown according to another exemplary embodiment.

[0026] Figure 4 It is another schematic diagram of a partial structure of a display panel shown according to an exemplary embodiment.

[0027] Figure 5 Is Figure 4 A schematic diagram of the isolation structure in.

[0028] Figure 6 It is another schematic diagram of a partial structure of a display panel shown according to another exemplary embodiment.

[0029] Figure 7 Is Figure 6 A schematic diagram of the isolation structure in.

[0030] Figure 8 It is a schematic diagram of the structure of a display panel shown according to another exemplary embodiment.

[0031] Figure 9 It is another schematic diagram of a partial structure of a display panel shown according to another exemplary embodiment.

[0032] Figure 10 Is Figure 9 A schematic diagram of the isolation structure in.

[0033] Figure 11 It is a schematic diagram of the electrical connection relationship of a display shown according to an exemplary embodiment.

[0034] Explanation of reference numerals:

[0035] 100, display panel; 200, control circuit board;

[0036] 10, pixel definition layer; 11, pixel opening; 12, isolation structure;

[0037] 110, first electrode; 120, second electrode layer; 1201, electrode part; 1202, connection part; 130, light-emitting unit;

[0038] 121, stepped ramp structure; 1211, stepped surface; 122, first recess; 123, second recess;

[0039] 20, encapsulation layer; 21, first inorganic encapsulation layer; 22, second inorganic encapsulation layer; 23, organic encapsulation layer;

[0040] 30. Auxiliary electrode layer; 31. Main auxiliary part; 32. Sub-auxiliary part;

[0041] 40. Driving backplane. Detailed implementation manners

[0042] The following will describe the implementation manners of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, rather than for limiting the protection scope of the present application.

[0043] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. Therefore, only the components related to the present application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0044] The following will describe the implementation manners of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, rather than for limiting the protection scope of the present application.

[0045] Embodiments of the present disclosure provide a display panel and a display. In this embodiment, in the present disclosure, the display panel includes a driving backplane and a pixel definition layer disposed in a stacked manner. On a surface of the pixel definition layer away from the driving backplane, a plurality of isolation structures are formed. The plurality of isolation structures enclose a plurality of pixel openings. A plurality of first electrodes, a plurality of light-emitting units, and a second electrode layer stacked in the plurality of pixel openings constitute a plurality of sub-pixels. The light-emitting units emit light through an electric field between the first electrode and the second electrode layer. That is, the isolation structures are located between two adjacent light-emitting units and are used to isolate the light-emitting units to avoid short circuits between the light-emitting units and ensure that each light-emitting unit can operate normally. In addition, due to the existence of the isolation structures, the second electrode layer may include a plurality of electrode portions and a plurality of connection portions that are connected and spaced apart, and the plurality of electrode portions correspond to the plurality of light-emitting units, and the plurality of connection portions correspond to the plurality of isolation structures. Based on the above structure, when the display panel of the related art is bent, the film layer of the second electrode layer is easily broken and peeled off at the climbing position of the isolation structure. That is, the film layer is easily broken and peeled off at the connection position between the electrode portion and the connection portion, thereby affecting the display effect of the entire display panel. In this application, an auxiliary electrode layer is newly added to the display panel, and the auxiliary electrode layer includes a plurality of main auxiliary portions made of a wrinkled metal-organic framework material (MOF). The main auxiliary portions are used to connect adjacent electrode portions. This wrinkled MOF material (which can also be referred to as wrinkled MOFs material (MOFs is the plural form of MOF)) can ensure the stability of its own structure under large deformations and has good conductivity. When the display panel is curled and deformed, the main auxiliary portions will be stretched accordingly to disperse the in-plane stress. And when the second electrode layer is broken at the connection position between the electrode portion and the connection portion due to multiple bends, the main auxiliary portions can still ensure the connection of adjacent electrode portions, that is, can still ensure the overall conductivity of the second electrode layer, thereby ensuring the uniformity of the signals in the second electrode layer, and thus ensuring the normal display of the display panel and improving the use experience of the display panel.

[0046] Embodiment 1

[0047] Reference Figure 1 and Figure 2 or reference Figure 2 and Figure 3As shown in the figure, this embodiment provides a display panel. The display panel can be, for example, a flexible display panel based on OLED. It should be noted that OLED, namely organic light-emitting diode, refers to an organic semiconductor device in which organic semiconductor materials and light-emitting materials emit light through carrier injection and recombination under the drive of an electric field. OLED has the characteristic of self-luminescence. The basic structure of OLED is to fabricate a layer of organic light-emitting material with a thickness of dozens of nanometers on an indium tin oxide (ITO) substrate as the light-emitting layer, and there is a metal electrode with a low work function above the light-emitting layer. The efficiency and lifespan of OLED are closely related to the device structure. The currently widely used structure belongs to the "sandwich" structure, that is, the light-emitting layer is sandwiched between the cathode and the anode like a sandwich (one side is a transparent electrode to obtain a surface light-emitting effect). The primary problem to be solved for the commercialization of OLED is how to ensure the stable light emission of the device.

[0048] Among them, the use of maskless deposition and photolithography to pattern pixels can effectively replace the evaporation process. In order to achieve high resolution and colorization of passive matrix OLEDs and better solve problems such as low cathode template resolution and low device yield, an isolation structure for the cathode, such as isolation structure 12, is introduced in actual research. That is, in the device preparation, instead of using a metal template, an insulating partition is fabricated on the substrate before evaporating the organic thin film and the metal cathode, and finally, different pixels of the device are separated to form a pixel array. The shape of the isolation structure 12 is crucial for the isolation effect. The base insulating buffer layer is used to solve the short-circuit problem of the anodes between pixels, and at the same time, an inverted trapezoidal isolation structure 12 is used to solve the short-circuit problem of the light-emitting units 130 between adjacent sub-pixels.

[0049] Among them, the height of the isolation structure 12 generally needs to be much greater than the total film thickness of all the light-emitting units 130 participating in light emission except for the cathode and the anode. Since the film thickness of a single-layer inorganic insulating material cannot reach this required height, generally, the isolation structure 12 can be prepared with organic materials. Moreover, the cathode is generally set as a front cathode layer. The overall cathode design is beneficial to improving the uniformity of the cathode itself, making the display brightness of each part of the screen consistent. Also for this reason, when the cathode layer breaks or is damaged in other ways, the cathode potentials in different regions within the plane will be uneven, resulting in abnormal display of the display panel.

[0050] For a flexible and rollable display panel, the display panel needs to adapt to multiple layers of repeated and complete deformation, with a relatively large deformation. Since the cathode needs to cover the entire display area, it is necessary to climb and descend around the relatively high isolation structure 12. The cathode itself is a metal or a metal compound, and its elasticity and toughness are both poor, and it is easy to break under the action of external forces. Therefore, the cathode layer is prone to break at the peripheral position of the isolation structure 12.

[0051] For bottom-emitting OLEDs, the cathode layer, as the light-emitting side, needs to be transparent to ensure light transmission. Currently, ITO (Indium Tin Oxide) is commonly used. ITO is not elastic, has poor toughness, and is very brittle. Therefore, when it is deformed and stressed, it is prone to breakage. When applied to products with curly deformation, elastic materials are generally preferred. However, elastic materials are usually organic compounds, and their hole injection ability is much worse than that of ITO materials, and the light transmittance of this material also needs to be considered. Considering the above, on the basis of retaining the cathode layer made of the original ITO material, using the auxiliary electrode layer 30 to increase connectivity is a relatively advisable solution.

[0052] Among them, metal-organic frameworks (MOFs) are a class of emerging porous crystalline materials. They have broad application prospects in the fields of gas storage, separation, catalysis, sensing, biomedicine, etc. Scientists obtained wrinkled MOF films with various patterns, that is, films made of wrinkled MOF materials, through the method of confined interface synthesis and by controlling "reaction-diffusion". This wrinkled MOF film unlocks the stretchable performance of MOF films, endows MOF films with the potential of plug-and-play, and opens up a new route for the integrated application of such materials in flexible electronics and other fields. A polymer coating layer was added to the surface of zinc oxide by atomic layer deposition (ALD), thus constructing a confined reaction space. In this space, the reaction reagents for synthesizing MOF diffuse from top to bottom, and the alkaline hydrolysis products released from the zinc oxide surface diffuse from bottom to top, thus forming a set of chemical traveling waves moving in opposite directions. Through mathematical modeling and numerical simulation, the researchers found that by regulating the "reaction-diffusion" conditions, various unstable states of waves with different morphologies can be obtained, that is, patterns are generated. Further, the research team prepared various types of patterns and obtained wrinkled MOF films with adjustable morphologies by changing the concentration of reaction reagents and the thickness of the polymer coating layer in the experiment. These patterns cover various pattern types such as classic maze-like stripes, dots, and rings.

[0053] Among them, introducing a wrinkled structure into the MOF film not only greatly increases the effective surface area of the MOF film, but also endows the film with excellent flexibility, enabling it to withstand a strain of up to 53.2% without being damaged. While the strain that the MOF bulk can withstand often does not exceed 0.3%. The excellent mechanical properties of the wrinkled MOF film enable the MOF material to be easily transferred between different substrates like a "sticker". The researchers transferred it to various substrates such as plexiglass, porous ceramics, and metal electrodes, and found that the structure and properties of the film can be well retained.

[0054] Based on this, the display panel provided in this embodiment has an auxiliary electrode layer 30 added thereto, and the auxiliary electrode layer 30 includes a plurality of main auxiliary parts 31 made of a wrinkled metal organic framework material (MOF). In other words, the auxiliary electrode layer 30 may include a plurality of wrinkled MOF films.

[0055] The display panel of this embodiment may include a stacked pixel definition layer 10 and a driving backplane 40. A plurality of isolation structures 12 may be formed on the surface of the pixel definition layer 10 away from the driving backplane 40, and the plurality of isolation structures are arranged to form a plurality of pixel openings 11. In addition, the display panel may also include a plurality of sub-pixels, and the plurality of sub-pixels include a plurality of first electrodes 110, a plurality of light-emitting units 130, and a second electrode layer 120 stacked in the plurality of pixel openings 11. The first electrode 110 is located on the side of the pixel definition layer 10 facing the driving backplane 40, and the second electrode layer 120 is located on the side of the pixel definition layer 10 away from the driving backplane 40, and the light-emitting unit 130 emits light through the electric field between the first electrode 110 and the second electrode layer 120.

[0056] For example, the first electrode 110 constitutes the anode of the light-emitting unit 130, and each light-emitting unit 130 is configured with an anode. The second electrode layer 120 can constitute the cathode layer of the light-emitting unit 130, and the cathode layer can be constructed as an integral film layer to improve the uniformity of the cathode itself, so that the display brightness of each part of the screen is consistent. In addition, in this example, a light-emitting unit 130 is placed in each pixel opening 11, and the isolation structure 12 is located between two adjacent light-emitting units 130, which is used to isolate the light-emitting unit 130 to avoid short circuits between the light-emitting units 130 and ensure that each light-emitting unit 130 can work normally.

[0057] The display panel may further include an encapsulation layer 20, which may include a first inorganic encapsulation layer 21, an organic encapsulation layer 23, and a second inorganic encapsulation layer 22 stacked in sequence to ensure an encapsulation effect. The pixel definition layer 10 is connected to the first inorganic encapsulation layer 21. Of course, the encapsulation layer 20 may also be set to other structures according to requirements, which is not limited thereto.

[0058] In this embodiment, due to the presence of the isolation structure 12, the second electrode layer 120 (for example, the cathode layer) may include a plurality of electrode portions 1201 and a plurality of connecting portions 1202 that are connected and spaced apart, that is, adjacent electrode portions 1201 are connected to the connecting portions 1202, a plurality of electrode portions 1201 correspond to a plurality of light-emitting units 130, and the electrode portions 1201 corresponding to each other are connected to the light-emitting units 130 and cover the light-emitting units 130; a plurality of connecting portions 1202 correspond to a plurality of isolation structures 12, and the connecting portions 1202 corresponding to each other are connected to the isolation structures 12 and cover the isolation structures 12.

[0059] That is to say, after the fabrication of the light-emitting unit 130 and the isolation structure 12 is completed, the second electrode layer 120 can be fabricated on the upper layer of the light-emitting unit 130 and the isolation structure 12, thereby forming a complete film layer. That is to say, in the second electrode layer 120, the electrode portion 1201 is the portion covering the light-emitting unit 130, the connecting portion 1202 is the portion covering the isolation structure 12, and the electrode portion 1201 and the connecting portion 1202 are connected together to form a complete second electrode layer 120.

[0060] Based on the above structure, when the display panel of the related art is bent, the film layer of the second electrode layer 120 is easily broken and peeled off at the climbing position of the isolation structure 12. That is, the film layer is easily broken and peeled off at the connection position between the electrode portion 1201 and the connecting portion 1202, thereby affecting the display effect of the entire display panel. In this embodiment, an auxiliary electrode layer 30 is newly added, and the auxiliary electrode layer 30 includes a plurality of main auxiliary portions 31 made of wrinkled MOF (or MOFs), and the main auxiliary portions 31 are used to connect adjacent electrode portions 1201.

[0061] In this embodiment, since the MOF material can ensure the stability of its own structure under large deformations and has good electrical conductivity. When the display panel is curled and deformed, the main auxiliary portions 31 will be stretched accordingly to disperse the in-plane stress. And when the second electrode layer 120 is broken at the connection position between the electrode portion 1201 and the connecting portion 1202 due to multiple bends, the main auxiliary portions 31 can still ensure the electrical connection between adjacent electrode portions 1201, that is, can still ensure the overall conductive effect of the second electrode layer 120, thereby ensuring the uniformity of the signals in the second electrode layer 120, and thus ensuring the normal display of the display panel and improving the use experience of the display panel.

[0062] Embodiment 2

[0063] Reference Figure 1 and Figure 2 or refer to Figure 2 and Figure 3 As shown in

[0064] In this embodiment, after the fabrication of the second electrode layer 120 and before the fabrication of the first inorganic encapsulation layer 21, the fabrication of the auxiliary electrode layer 30 can be added, and the remaining processes can remain unchanged, which is more convenient for the fabrication of the display panel in this embodiment and can ensure the fabrication efficiency of the display panel. It should be noted that the MOF material is a metal + organic composite material, and a thin film layer can be directly mass-produced. When fabricating the main auxiliary part 31, either a coating or printing process can be used, and the fixed pattern can be fabricated using an etching process, which will not be elaborated here.

[0065] In addition, since the surface of the wrinkled MOF thin film has a wrinkled structure, which will affect the light transmittance, and the film layer in the pixel display area of the display panel is relatively flat, the probability of breakage of the second electrode layer 120 (i.e., the electrode part 1201) in this part is relatively low. Therefore, the main auxiliary part 31 can be placed around the isolation structure 12, and it is only necessary to ensure that the position with a step covers the wrinkled MOF thin film. That is to say, in this embodiment, in the auxiliary electrode layer 30, multiple main auxiliary parts 31 can correspond to multiple connection parts 1202, and the corresponding main auxiliary parts 31 cover the connection parts 1202. That is, a layer of main auxiliary part 31 is provided on the upper layer of each connection part 1202, and the main auxiliary part 31 can connect adjacent electrode parts 1201. That is to say, the extending direction of the main auxiliary part 31 is the same as that of the connection part 1202, both starting from the first adjacent electrode part 1201 and extending along the isolation structure 12 towards the direction where the second electrode part 1201 is located, thereby connecting two adjacent electrode parts 1201 together. Therefore, when the connection position between the connection part 1202 and the electrode part 1201 is damaged due to bending, such as breakage, which affects their electrical connection, since the main auxiliary part 31 has good toughness and conductivity, the adjacent electrode parts 1201 can still conduct electricity through the main auxiliary part 31 between them, so as to better ensure the overall electrical conductivity of the second electrode layer 120, thereby ensuring the uniformity of the signals in the second electrode layer 120, and thus ensuring the normal display of the display panel and improving the use experience of the display panel.

[0066] Embodiment III

[0067] Reference Figure 2 and Figure 3 As shown in [references], this embodiment provides a display panel. This embodiment is a further improvement based on the above embodiment. In this embodiment, the auxiliary electrode layer 30 may further include multiple sub-auxiliary parts 32 made of a flat organic metal framework material (flat MOF (or MOFs) material). The multiple sub-auxiliary parts 32 are arranged alternately with the multiple main auxiliary parts 31, and adjacent sub-auxiliary parts 32 and main auxiliary parts 31 are connected. That is to say, the sub-auxiliary parts 32 and the main auxiliary parts 31 are connected in sequence to form a complete auxiliary electrode layer 30.

[0068] Among them, multiple secondary auxiliary parts 32 correspond to multiple electrode parts 1201 one by one, and the corresponding secondary auxiliary parts 32 cover the electrode parts 1201. Therefore, the auxiliary electrode layer 30 can completely cover the second electrode layer 120. Among them, the secondary auxiliary parts 32 of the auxiliary electrode layer 30 cover the electrode parts 1201 of the second electrode layer 120, and the main auxiliary part 31 of the auxiliary electrode layer 30 covers the connection part 1202 of the second electrode layer 120. Through this structure, when the second electrode layer 120 is damaged such as broken at the climbing position of the isolation structure 12, the auxiliary electrode layer 30 can better ensure the uniformity of the signal in the second electrode layer 120, thereby ensuring the normal display of the display panel and improving the use experience of the display panel.

[0069] It should be noted that in this embodiment, since the surface of the wrinkled MOF thin film has a wrinkled structure, it will affect the light transmittance, and the film layer in the pixel display area of the display panel is relatively flat, and the probability of breakage of this part of the second electrode layer 120 (i.e., the electrode part 1201) is relatively low. Therefore, the main auxiliary part 31 can be placed around the isolation structure 12 to ensure that the position with a step covers the wrinkled MOF material. The display area uses a secondary auxiliary part 32 composed of a two-dimensional flat MOF thin film. The production material of the flat MOF thin film is a two-dimensional MOFs material, without a hole structure in the middle. At the same time, the flexible conductive MOFs (the macrocyclic ligand (2,3,8,9,14,15-hexahydroxytriphenylene cyclooctyne (HHTC)) is synthesized into a functionalizable EC-MOF Cu3(HHTC)2, abbreviated as Cu-HHTC. The conductivity of Cu-HHTC is as high as 3.02×10-3 S / cm) has a very small absorption rate of visible light (<5%), which can reduce the impact on display bright spots to a certain extent. However, its own ultra-high conductivity and specific surface area can also adsorb molecules such as oxygen and water vapor, reducing the risk of encapsulation failure. In addition, the two-dimensional MOFs material of the secondary auxiliary part 32 can also be replaced by a two-dimensional graphene structure material, which is not limited here.

[0070] Embodiment 4

[0071] Reference Figure 1 and Figure 2 and Figure 4 and Figure 5 shown, or, reference Figures 2 to 5As shown, this embodiment provides a display panel. This embodiment is a further improvement based on the above embodiment. In this embodiment, the isolation structure 12 includes a stepped ramp structure 121, and the stepped ramp structure 121 is located on the side of the light-emitting unit 130 facing away from the driving backplane 40 and is used to set the connection part 1202 of the second electrode layer 120. Among them, the connection part 1202 adheres to the stepped ramp structure 121 of the isolation structure 12 and the side of the isolation structure 121 facing away from the driving backplane 40, so that the connection part 1202 also forms a stepped ramp shape. In addition, the main auxiliary part 31 adheres to the side of the connection part 1202 facing away from the isolation structure 12, so that the main auxiliary part 31 is also configured as a stepped ramp shape.

[0072] It should be noted that in this embodiment, the main auxiliary part 31 covers the outside of the isolation structure 12 in a whole-surface shape. Since the main auxiliary part 31 is like a mesh structure, and a smooth surface is not conducive to the adhesion and deformation of the film layer. In order to make it adhere more closely to the isolation structure 12 and have a certain amount of deformation when the main auxiliary part 31 curls, the isolation structure 12 can be Figure 1 or Figure 2 improved from the smooth ramp shape shown to a stepped ramp shape. Each step is recessed unilaterally by 1 μm to 2 μm, and the step height accounts for 20% to 30% of the height of the isolation structure 12. Based on the above isolation structure 12, the connection part 1202 of the finally formed second electrode layer 120 is also configured as a stepped ramp shape, so that the main auxiliary part 31 forms a stepped ramp structure 121 on both sides of the isolation structure 12 facing its adjacent electrode part 1201.

[0073] Among them, for the stepped ramp-shaped main auxiliary part 31, its multiple steps can enable the MOF material to have multiple climbing surfaces, and multiple steps will provide multiple stepped planes, which is beneficial to increasing the coverage area of the MOF material as much as possible. Moreover, the alternation of the ramp and the steps will enable the MOF material to have multiple deformation buffer positions when stretched, and can also increase the contact area between the connection part 1202 of the second electrode layer 120, the main auxiliary part 31, and the isolation structure 12, increase the deposition amount of the ITO material of the second electrode layer 120, enable the second electrode layer 120 to fill into the folds of the main auxiliary part 31 as much as possible, and setting the entire ramp with steps can reduce the single climbing slope of the second electrode layer 120, so it is less likely to be torn during deformation, which is beneficial to maintaining the stability of the second electrode layer 120.

[0074] In addition, for the number of steps in the stepped ramp structure 121, it can be set according to the actual situation, and no specific value is required.

[0075] In this embodiment, by providing a stepped ramp structure 121 in the isolation structure 12, the connecting portion 1202 and the main auxiliary portion 31 also have a stepped ramp climbing area, which can better prevent the second electrode layer 120 from being torn when the display panel is bent and deformed, and is more conducive to maintaining the stability of the second electrode layer 120. Coupled with the auxiliary conduction of the main auxiliary portion 31, the overall conduction effect of the second electrode layer 120 can be better guaranteed, thereby ensuring the uniformity of the signals in the second electrode layer 120, ensuring the normal display of the display panel, and improving the user experience of the display panel.

[0076] Embodiment Five

[0077] Reference Figure 1 Figure 2 And Figure 6 And Figure 7 As shown, or, reference Figure 2 、 Figure 3 、 Figure 6 And Figure 7 As shown, this embodiment provides a display panel. This embodiment is a further improvement based on the above embodiment. In this embodiment, at least one step surface 1211 of the stepped ramp structure 121 is provided with a first recess 122, and the first recess 122 is recessed from the step surface 1211 in the direction towards the driving backplane 40.

[0078] Among them, due to the provision of the first recess 122, even if the number of step surfaces 1211 is reduced, the required contact area can be ensured. For example, in this embodiment, the number of step surfaces 1211 can be reduced by two. That is, one step surface 1211 is provided on each of the slopes of the isolation structure 12 near the electrode portions 1201 on both sides thereof, and one surface of the isolation structure 12 facing the encapsulation layer 20 constitutes another step surface 1211 (the step surface 1211 at the top of the isolation structure 12). That is, each stepped ramp structure 121 can include two step surfaces 1211, and a first recess 122 is provided at the position of each step surface 1211. Among them, the step surface 1211 can be recessed inward by 1 um to 2 um on one side, the position where the step surface 1211 is located can account for about 50% of the height of the isolation structure 12, one step surface 1211 is provided on each of the inclined surfaces on both sides, and the top surface of the isolation structure 12 serves as the step surface 1211 shared by the stepped ramp structures 121 on both sides, that is, a total of three step surfaces 1211 are provided for each isolation structure 12. By providing the first recess 122 at the step surface 1211 and filling the concave pit of the first recess 122 with the wrinkled MOF material, the provision of the first recess 122 can also play a role in increasing the deposition area of the wrinkled MOF material and providing a deformation buffer surface. At the same time, the connecting portion 1202 of the second electrode layer 120 can also fall onto the surface of the main auxiliary portion 31, improving the contact area between the two.

[0079] In addition, it should be noted that the pit of the second recess 123 can be a circular pit. For example, the pit can be a circular pit with a diameter of about 1 um and a depth of 0.3 um to 0.5 um. Of course, it can also be a pit of other shapes, and no limitation is imposed thereon. When there is more than one first recess 122 provided on the step surface 1211, the interval between adjacent first recesses 122 can be about 1 um. Of course, it can also be set to other intervals according to actual situations, and no limitation is imposed thereon. Among them, the circular pit has no sharp corners, which is more conducive to reducing the risk of the MOF material being torn at the sharp corner positions during deformation.

[0080] In addition, in this embodiment, the number of the step surfaces 1211 can also be set according to actual situations, and no specific limitation is imposed on its specific number.

[0081] By providing the first recess 122 on the step surface 1211 in this embodiment, the functions of increasing the deposition area of the wrinkled MOF material and providing a deformation buffer surface can be achieved. At the same time, the connection portion 1202 of the second electrode layer 120 can also fall on the surface of the main auxiliary portion 31, improving the contact area between the two, so as to better avoid the second electrode layer 120 being torn when the display panel is bent and deformed, which is more conducive to maintaining the stability of the second electrode layer 120. Coupled with the auxiliary conduction of the main auxiliary portion 31, the overall conduction effect of the second electrode layer 120 can be better guaranteed, thereby ensuring the uniformity of the signals in the second electrode layer 120, and thus ensuring the normal display of the display panel and improving the use experience of the display panel.

[0082] Embodiment Six

[0083] Reference Figure 8 As shown, this embodiment provides a display panel. This embodiment is a further improvement based on the above embodiment. In this embodiment, the auxiliary electrode layer 30 can be located within the pixel definition layer 10 as long as it can connect adjacent electrode portions 1201 together.

[0084] Among them, the auxiliary electrode layer 30 can be disposed within the isolation structure 12. For example, multiple main auxiliary portions 31 of the auxiliary electrode layer 30 can correspond to the multiple isolation structures 12, that is, one main auxiliary portion 31 is disposed at the position of each isolation structure 12, and the main auxiliary portion 31 can penetrate the corresponding isolation structure 12 to connect two adjacent electrode portions 1201. That is to say, the main auxiliary portion 31 penetrates the isolation structure 12 and is respectively connected to the electrode portions 1201 on both sides of this isolation structure 12, thereby connecting two adjacent electrode portions 1201 together. Based on this, when the connection position between the electrode portion 1201 and the connection portion 1202 is damaged, the main auxiliary portion 31 can realize signal transmission between adjacent electrode portions 1201, that is, the adjacent electrode portions 1201 can still conduct electricity through the main auxiliary portion 31 between them, so as to better ensure the overall conductivity of the second electrode layer 120, thereby ensuring the uniformity of the signals in the second electrode layer 120, thereby ensuring the normal display of the display panel and improving the use experience of the display panel.

[0085] It should be noted that the wrinkled MOF material is placed inside the isolation structure 12 (which can also be called a hanging structure) and contacts the second cathode layer inside the isolation structure 12. The isolation structure 12 made of an organic material can also provide an elastic deformation space for the large deformation of the MOF material, which is more suitable for situations with large deformations. When the connection position between the electrode portion 1201 and the connection portion 1202 in the second electrode layer 120 or the connection portion 1202 breaks or fails under certain circumstances, the main auxiliary portion 31 at the connection position between the light-emitting units 130 can be used as a mesh connection instead. And due to its large elasticity itself, it is applicable to large deformation or stretching situations. In the case where the second electrode layer 120 does not fail, the conductive main auxiliary portion 31 can also be used as the auxiliary electrode layer 30 to reduce the overall IR drop (referring to the voltage drop generated at both ends of a resistor when current passes through the resistor) of the second electrode layer 120 and improve the display uniformity of the display panel, which is more suitable for large-size flexible display panels.

[0086] Embodiment Seven

[0087] Reference Figure 8 、 Figure 9 and Figure 10 As shown in

[0088] Among them, the main auxiliary part 31 covers the inside of the isolation structure 12 in a whole-surface shape, and a number of concave second recessed parts 123 are arranged inside the isolation structure 12. For example, the second recessed part 123 can be circular pits with a diameter of about 1 um, a depth of 0.3 um to 0.5 um, and a spacing of about 1 um. By providing the above-mentioned multiple second recessed parts 123, it is beneficial to increase the coverage area of the MOF material as much as possible, and enable the main auxiliary part 31 to have multiple deformation buffer positions when stretched, making it less likely to be pulled apart. Based on this, when the connection position between the electrode part 1201 and the connection part 1202 is damaged, the main auxiliary part 31 that is less likely to be pulled apart can realize the signal transmission between adjacent electrode parts 1201, that is, the adjacent electrode parts 1201 can still conduct electricity through the main auxiliary part 31 between them, so as to better ensure the overall conductivity of the second electrode layer 120, thereby ensuring the uniformity of the signals in the second electrode layer 120, and thus ensuring the normal display of the display panel and improving the use experience of the display panel.

[0089] Embodiment VIII

[0090] Reference Figure 1 and Figure 11 As shown, this embodiment provides a display, which may include a control circuit board 200 and the display panel 100 in the above embodiment. The control circuit board 200 is electrically connected to the display panel 100 for controlling the display panel 100 to display corresponding images.

[0091] In this embodiment, by adding an auxiliary electrode layer 30 in the display panel 100, when the display panel 100 undergoes curling deformation, the main auxiliary part 31 will be stretched accordingly to disperse the in-plane stress. And when the second electrode layer 120 breaks at the connection position between the electrode part 1201 and the connection part 1202 due to multiple bends, the main auxiliary part 31 can still ensure the connection of adjacent electrode parts 1201, that is, can still ensure the overall conductivity of the second electrode layer 120, thereby ensuring the uniformity of the signals in the second electrode layer 120, and thus ensuring the normal display of the display panel 100 and improving the use experience of the display panel 100.

[0092] Those skilled in the art should further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Skilled professionals can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0093] It should be noted that phrases such as "one embodiment", "example", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0094] It should be noted that in this text, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0095] The above embodiments are only preferred embodiments given to fully illustrate the present application, and the protection scope of the present application is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present application are within the protection scope of the present application.

Claims

1. A display panel, comprising: Driver backplane; A pixel definition layer, wherein a plurality of isolation structures are formed on a surface of a side of the pixel definition layer away from the driving backplane, and the plurality of isolation structures are arranged to form a plurality of pixel openings; A plurality of sub-pixels, comprising a plurality of first electrodes, a plurality of light-emitting units and a second electrode layer stacked and arranged in the plurality of pixel openings; It is characterized in that The second electrode layer includes a plurality of electrode portions and a plurality of connecting portions that are connected and spaced apart, the plurality of electrode portions correspond to the plurality of light-emitting units, and the plurality of connecting portions correspond to the plurality of isolation structures; Wherein, the display panel further comprises an auxiliary electrode layer, the auxiliary electrode layer comprises a plurality of main auxiliary parts made of a wrinkled organic metal framework material, and the main auxiliary parts are used to connect adjacent electrode parts.

2. The display panel according to claim 1, characterized in that: The auxiliary electrode layer is located on a side of the second electrode layer away from the driving backplane.

3. The display panel according to claim 2, characterized in that: The plurality of main auxiliary portions correspond to the plurality of connecting portions, and the main auxiliary portions corresponding to each other cover the connecting portions.

4. The display panel according to claim 2, characterized in that: The auxiliary electrode layer also includes a plurality of auxiliary parts made of a flat organic metal framework material, wherein the plurality of auxiliary parts are alternately arranged with the plurality of main auxiliary parts, and adjacent auxiliary parts are connected to the main auxiliary parts; wherein the plurality of auxiliary parts correspond one-to-one to the plurality of electrode parts, and the corresponding auxiliary parts cover the electrode parts.

5. The display panel according to claim 3, characterized in that: The isolation structure includes a step-slope structure, which is located on the side of the light-emitting unit away from the driving backplane, and the connecting part is attached to the slope structure of the isolation structure and a side of the isolation structure away from the driving backplane, and the main auxiliary part is attached to the side of the connecting part away from the isolation structure, so that the connecting part and the main auxiliary part are both constructed in a step-slope shape.

6. The display panel according to claim 5, characterized in that: At least one step surface of the step slope structure is provided with a first recessed portion, and the first recessed portion is recessed from the step surface toward the driving back plate.

7. The display panel according to claim 1, characterized in that: The auxiliary electrode layer is located in the pixel definition layer.

8. The display panel according to claim 7, characterized in that: The plurality of main auxiliary parts correspond to the plurality of isolation structures, and the main auxiliary parts penetrate the isolation structures to connect the adjacent electrode parts.

9. The display panel according to claim 8, characterized in that: The position where the main auxiliary part is arranged in the isolation structure includes a plurality of second recessed parts, and the second recessed parts are recessed from the main auxiliary part toward the isolation structure toward the driving back plate.

10. A display, characterized in that: The display comprises a control circuit board and a display panel as claimed in any one of claims 1 to 9, wherein the control circuit board is electrically connected to the display panel and is used to control the display panel to display a corresponding picture.

Images