Display panel and display device

Abstract

The application relates to a display panel and a display device, and relates to the technical field of display. The display panel comprises a lower substrate, a pixel definition layer and a pixel unit. The pixel definition layer is arranged on one side of the lower substrate, and comprises a plurality of spaced-apart opening regions and a non-opening region between two adjacent opening regions. The pixel unit comprises a main pixel part and an auxiliary pixel part arranged in the same opening region. The auxiliary pixel part comprises an auxiliary anode arranged on the lower substrate. The auxiliary anode extends from the side wall of the opening region to the side of the non-opening region away from the lower substrate in a direction away from the lower substrate. When the display panel is stretched, the resistance value of the auxiliary anode decreases with the increase of the stretching degree of the display panel, so that the luminous intensity of the auxiliary pixel part is enhanced. The technical scheme disclosed by the application can solve the compensation misalignment caused by the sensing of single-layer deformation in the existing compensation mode, and significantly improve the compensation accuracy.

Description

Technical Field

[0001] This application relates to the field of displays, and more particularly to a display panel and display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) have been widely used in the field of stretchable displays due to their advantages such as flexibility and ultra-thinness. However, when stretchable displays are stretched, the pixel pitch increases, resulting in a decrease in the number of pixels per unit area, which in turn reduces resolution and display brightness, severely impacting the viewing experience.

[0003] Existing technologies have proposed several compensation schemes, such as using software-level algorithms to enhance the brightness near the "empty pixel" areas formed by the increased pixel spacing after stretching, in order to compensate for the visual resolution loss. However, flexible stretchable displays typically have a large thickness and contain multiple layers of flexible materials stacked internally. During the stretching process, the stretching state differs between the substrate containing the light-emitting layer and the upper encapsulation structure. Existing compensation methods struggle to simultaneously and accurately detect the actual deformation degree of the two different layers, resulting in limited compensation effectiveness. Summary of the Invention

[0004] This application provides a display panel and display device that can solve the problem of compensation inaccuracy caused by existing compensation methods that only sense the deformation of a single layer, and significantly improve the compensation accuracy.

[0005] In a first aspect, this application provides a display panel, including: lower base plate; A pixel definition layer is protruding from one side of the lower substrate. The pixel definition layer includes a plurality of spaced-apart opening areas and a non-opening area located between two adjacent opening areas. A pixel unit includes a main pixel portion and an auxiliary pixel portion located in the same opening area and arranged adjacent to each other. The auxiliary pixel portion includes an auxiliary anode disposed on the lower substrate. The auxiliary anode extends from the opening area through the sidewall of the non-opening area in a direction away from the lower substrate to the side of the non-opening area away from the lower substrate. When the display panel is stretched, the resistance of the auxiliary anode decreases as the stretching of the display panel increases, thereby enhancing the luminous intensity of the auxiliary pixel portion.

[0006] In some embodiments, the auxiliary anode is formed of a conductive folded metamaterial; wherein the conductive folded metamaterial exhibits increased resistance when compressed and decreased resistance when stretched.

[0007] In some embodiments, the main pixel portion includes a main anode disposed on the lower substrate, wherein the main anode and the auxiliary anode are arranged at a distance from each other; The pixel unit further includes an organic light-emitting functional layer and a cathode. The organic light-emitting functional layer continuously covers the side of the main anode facing away from the lower substrate and the side of the auxiliary anode facing away from the lower substrate. The cathode continuously covers the side of the organic light-emitting functional layer facing away from the lower substrate. The main anode, together with the organic light-emitting functional layer covering the main anode and the cathode, forms the main pixel portion, and the auxiliary anode, together with the organic light-emitting functional layer covering the auxiliary anode and the cathode, forms the auxiliary pixel portion.

[0008] In some embodiments, the auxiliary anode includes: The first anode section is disposed on the lower substrate; The second anode section has one end connected to the first anode section, and the other end extends through the sidewall of the non-opening area and in a direction away from the lower substrate to the side of the non-opening area away from the lower substrate. The third anode segment is disposed on the side of the non-opening area away from the lower substrate and is connected to the second anode segment.

[0009] In some embodiments, the second anode segment is disposed at an angle relative to the lower substrate.

[0010] In some embodiments, the display panel further includes an isolation protrusion disposed on the lower substrate, the isolation protrusion being located between the main anode and the auxiliary anode, and the organic light-emitting functional layer covering the isolation protrusion.

[0011] In some embodiments, the display panel further includes an insulating partition that covers at least a portion of the side of the first anode segment facing away from the lower substrate and at least a portion of the side of the second anode segment facing the opening region; the edge of the organic light-emitting functional layer is adjacent to the insulating partition, and the cathode covers at least a portion of the insulating partition.

[0012] In some embodiments, the display panel further includes an anode signal input terminal disposed on the lower substrate, the anode signal input terminal being disposed opposite to the non-opening area in a direction perpendicular to the lower substrate, a conductive path being formed in the non-opening area, and the anode signal input terminal being electrically connected to the third anode segment through the conductive path.

[0013] In some embodiments, the display panel further includes: An encapsulation layer covers the side of the cathode facing away from the lower substrate, the side of the third anode segment facing away from the lower substrate, and the side of the non-opening area facing away from the lower substrate. A flexible substrate is stacked and covers the side of the encapsulation layer opposite to the lower substrate; A color resist layer is disposed on the side of the flexible substrate away from the lower substrate. The color resist layer includes a plurality of color resist portions, each of which corresponds to a pixel unit, and two adjacent color resist portions are adjacent to each other above the non-opening area.

[0014] Secondly, this application provides a display device, including the display panel as described above.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: The display panel provided in this application embodiment has auxiliary pixel units located in the same opening area and arranged adjacent to the main pixel units. The auxiliary anode of the auxiliary pixel units extends from the sidewall of the non-opening area away from the lower substrate to the side of the non-opening area away from the lower substrate. When the display panel is stretched, the resistance of the auxiliary anode decreases, thereby automatically enhancing the luminous intensity of the auxiliary pixel units. Furthermore, since different degrees of stretching affect the resistance value—greater stretching results in lower resistance and greater luminous intensity—it can dynamically compensate for the decrease in brightness per unit area caused by an increase in the opening of the display area, effectively overcoming the resolution reduction and graininess issues caused by increased pixel pitch in traditional solutions. Simultaneously, the auxiliary anode extends from the opening area through the sidewall of the non-opening area to the top of the non-opening area, its path crossing the lower substrate, the pixel definition layer, and the layers above. This comprehensively reflects the overall deformation differences of the multi-layer structure during stretching, avoiding the inaccuracies caused by common compensation methods that only sense the deformation of a single layer, significantly improving compensation accuracy. In addition, this structure utilizes an auxiliary anode to achieve passive adaptive compensation, eliminating the need for additional displacement sensors or complex feedback circuits, which helps simplify the panel structure, reduce manufacturing costs, and improve tensile reliability. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the structure of the display panel provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the conductive folded metamaterial provided in the embodiments of this application; Figure 3 This is an enlarged schematic diagram of the conductive folded metamaterial provided in the embodiments of this application; Figure 4 This is a schematic diagram of the pixel spacing before and after stretching a display panel in the prior art.

[0020] Explanation of reference numerals in the attached figures: 10. Lower base plate; 20. Pixel definition layer; 210. Non-aperture area; 30. Pixel unit; 310. Main pixel section; 3101. Main anode; 320. Auxiliary pixel section; 3201. Auxiliary anode; 3202. First anode segment; 3203. Second anode segment; 3204. Third anode segment; 330. Organic light-emitting functional layer; 340. Cathode; 40. Isolate the protruding part; 50. Anode signal input terminal; 60. Conductive path; 70. Encapsulation layer; 710. Inorganic encapsulation layer; 720. Organic encapsulation layer; 80. Flexible substrate; 90. Color resist layer; 910. Color resist section; 91. Functional membrane; 92. Flexible insulating layer; 93. Insulating separator. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0023] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0024] Organic light-emitting diodes (OLEDs) have achieved mass production and are widely used in the display field due to their advantages such as surface light source, cold light, energy saving, fast response, flexibility, ultra-thinness, and low cost. Typically, the light-emitting layer of an OLED consists of three organic thin films of red, green, and blue (RGB). During the manufacturing process, a patterning process is required using grids (also known as isolation pillars) on the substrate to achieve high-resolution color display.

[0025] In recent years, flexible and stretchable displays have attracted widespread attention as a new type of display device. By forming display pixel units, connecting wires, and light-emitting units on an organic flexible substrate, a stretchable display device can be achieved that can be stretched or contracted in a specific direction while maintaining a fixed shape. This type of device is currently used in small-sized screens such as wearable devices and portable displays, and is expected to be widely adopted in the field of large-screen televisions in the future.

[0026] However, stretchable display products face a significant problem in practical use: such as Figure 4 As shown, when a screen is stretched by an external force, the physical distance between pixels within the display area increases, resulting in a decrease in the number of pixels per unit area, thus reducing the resolution. This difference in resolution before and after stretching causes noticeable graininess in the displayed image, severely degrading the user's viewing experience.

[0027] To alleviate the aforementioned problems, existing technologies have proposed several compensation schemes. For example, from a software perspective, algorithms can be used to enhance the brightness near the "empty pixel" areas created by the increased pixel spacing after stretching, thus compensating for the visual resolution loss. However, flexible stretchable displays typically have a significant thickness, containing multiple layers of flexible materials stacked to meet stretching reliability requirements. During stretching, the stretching state differs between the substrate containing the light-emitting layer and the upper encapsulation structure. Existing compensation methods struggle to simultaneously and accurately detect the actual deformation degrees of these two different layers. Therefore, the compensation effects of existing schemes are limited, failing to achieve brightness or resolution compensation that precisely matches the degree of stretching.

[0028] In response to the above technical problems, such as Figure 1 As shown, this application embodiment provides a display panel including a lower substrate 10, a pixel definition layer 20, and pixel units 30. The pixel definition layer 20 protrudes from one side of the lower substrate 10 and includes a plurality of spaced-apart opening areas and a non-opening area 210 located between two adjacent opening areas. The pixel unit 30 includes a main pixel portion 310 and an auxiliary pixel portion 320 located in the same opening area and arranged adjacently. The auxiliary pixel portion 320 includes an auxiliary anode 3201 disposed on the lower substrate 10. The auxiliary anode 3201 extends through the sidewall of the non-opening area and in a direction away from the lower substrate 10 to the side of the non-opening area 210 away from the lower substrate 10. When the display panel is stretched, the resistance value of the auxiliary anode 3201 decreases as the stretching degree of the display panel increases, thereby enhancing the light emission intensity of the auxiliary pixel portion 320.

[0029] As can be seen from the above, by setting an auxiliary pixel portion 320 located in the same opening area and arranged adjacent to the main pixel portion 310, and setting the auxiliary anode 3201 of the auxiliary pixel portion 320 to extend through the sidewall of the non-opening area and along the direction away from the lower substrate 10 to the side of the non-opening area 210 away from the lower substrate 10, when the display panel is stretched, the resistance value of the auxiliary anode 3201 will decrease accordingly, thereby automatically enhancing the luminous intensity of the auxiliary pixel portion 320. At the same time, since different stretching degrees affect the resistance value, the greater the stretching degree, the smaller the resistance value and the greater the luminous intensity, it is possible to dynamically compensate for the decrease in brightness per unit area caused by the increase in the opening of the display area according to the actual stretching amount, effectively overcoming the resolution reduction and graininess problems caused by the increase in pixel pitch in traditional solutions. Meanwhile, the auxiliary anode 3201 extends from the opening area through the sidewall of the non-opening area 210 to the top of the non-opening area 210. Its path spans the lower substrate 10, the pixel definition layer 20, and the layers above it. This allows it to comprehensively reflect the overall deformation differences of the multi-layer structure during stretching, avoiding the compensation inaccuracies caused by common compensation methods that only sense the deformation of a single layer, thus significantly improving compensation accuracy. In addition, this structure utilizes the auxiliary anode 3201 to achieve passive adaptive compensation, eliminating the need for additional displacement sensors or complex feedback circuits. This simplifies the panel structure, reduces manufacturing costs, and improves stretching reliability.

[0030] It should be noted that the pixel definition layer 20 is formed of insulating material, which not only defines the light-emitting area, but also serves to isolate the organic light-emitting layer and cathode 340 between adjacent pixel units 30, preventing short circuits and optical crosstalk; the opening area is the area where the pixel unit 30 actually emits light, while the non-opening area 210 does not participate in light emission, but is used to support the upper structure, isolate pixels, and provide a path for the auxiliary anode 3201 to pass through.

[0031] It should also be noted that when the display panel is stretched, the pixel pitch increases, and the number of main pixel portions 310 per unit area decreases, resulting in a decrease in display brightness. At this time, the resistance of the auxiliary anode 3201 decreases due to stretching. Under the same anode driving voltage, the current flowing through the auxiliary pixel portion 320 increases, thus enhancing its luminous intensity. Since the greater the stretching, the lower the resistance of the auxiliary anode 3201, the stronger the luminous intensity of the auxiliary pixel portion 320, automatic compensation related to the stretching amount is achieved. This compensation process is continuous and stepless, capable of adapting to different stretching degrees and maintaining the uniformity of the overall brightness of the display panel. Existing stretching compensation schemes typically only sense the deformation of a single layer of the substrate, ignoring the strain differences of upper-layer structures such as the encapsulation layer 70 and the pixel definition layer 20, resulting in a mismatch between the compensation signal and the actual pixel opening change. In this invention, the auxiliary anode 3201 extends from the substrate surface along the sidewall of the non-opening area 210 to its top. Its deformation is the combined result of the deformation of the lower substrate 10, the pixel definition layer 20, and the upper encapsulation layer 70. Therefore, it can more accurately represent the overall stretching state of the entire display panel in the thickness direction, and the compensation accuracy is significantly improved.

[0032] It should also be noted that the pixel unit 30 includes a red pixel unit, a green pixel unit 30, and a blue pixel unit; the red pixel unit, green pixel unit, and blue pixel unit are arranged alternately to achieve full-color display. Each pixel unit 30 includes an organic light-emitting functional layer 330 and a cathode 340, wherein the organic light-emitting functional layer 330 emits light of the corresponding color (red pixel unit emits red light, green pixel unit emits green light, and blue pixel unit emits blue light).

[0033] In some embodiments, the auxiliary anode 3201 is formed of a conductive folded metamaterial; wherein the conductive folded metamaterial has increased resistance when compressed and decreased resistance when stretched.

[0034] It is important to note that conductive folded metamaterials (CFMs) are a new type of metamaterial that possesses high conductivity and excellent mechanical folding durability through artificial structural design. Their core characteristics stem from their intricately designed microstructure, rather than the material's inherent chemical composition. Traditional intrinsically conductive materials (such as metals, conductive polymers, and carbon nanotubes) rely on chemical bonds to transfer stress, making them unable to withstand repeated 180° "true folds" (i.e., the two sides are completely flush at the fold), and stress accumulation can easily lead to fracture or performance degradation. In contrast, CFMs, through specific microstructural designs, can maintain excellent conductivity while withstanding numerous or even unlimited damage-free folds. CFMs can be prepared using various processes. For example... Figure 2 , Figure 3As shown, in some embodiments, a low-power laser is coupled with a biomimetic Taylor cone process in a high-voltage electrostatic field using a "laser-electrostatic field coupled biomimetic spinning" technique. This allows for precise control of the flight assembly parameters of the carbon nanotube precursor solution, resulting in polymer composite fibers. After carbonization, conductive folded metamaterials are obtained; the conductivity of this material can reach 10³ S·m. - ¹ magnitude, and can withstand 10 7 The material undergoes multiple, even infinite, lossless folding processes. During the folding process, an "ε"-like structure is formed inside the material, consisting of a wave-like protrusion layer, localized fiber slip grooves, and stress dispersion arcs. This structure effectively disperses the stress generated by the 180° folding in multiple dimensions, including lines, surfaces, and volumes, preventing chemical bonds from directly bearing extreme stress and thus protecting the integrity of the conductive nanofibers. CFMs possess unique electrical properties. Under tensile strains of 0–50% or even higher, their electrical resistance decreases significantly with increasing tension, and recovers reversibly upon release. The microscopic mechanism behind this property lies in the controllable topological reconstruction of the conductive network within the CFMs, rather than a simple "stretching." Specifically, the conductive network of CFMs exhibits a three-dimensional porous, wrinkled, or interlocked structure, undergoing the following changes upon stretching: (1) The contact resistance drops significantly. In the initial state, the conductive nanounits that make up CFMs (such as carbon nanotubes, MXene, graphene, etc.) are in point contact or weak contact, and the contact resistance is relatively large. After stretching, the units are straightened and compressed, and they are transformed into surface contact or strong contact. The contact area increases exponentially, thereby causing the contact resistance to drop sharply. (2) The conductive path is "straightened" and the bulk resistance decreases. In the initial state, the conductive network is bent and entangled, the carrier transport path is long and there is a lot of scattering; after stretching, the path is straightened, the carrier path becomes shorter and the bulk resistance decreases; (3) The porous structure is densified, and the conductive network is more continuous. In the initial state, there are a lot of air gaps in the porous structure, and the conductive path is discontinuous; after stretching, the pores are compressed and closed, the conductive network is more dense, and the overall conductivity is improved; CFMs offer diverse material systems, allowing selection based on specific application requirements. Mainstream materials include MXene (two-dimensional transition metal carbides, nitrides, or carbonitrides)-based CFMs, carbon nanotube or graphene-based CFMs, and composite structures of metal nanowires or nanomesh with CFMs. The specific structures, properties, and preparation methods of CFMs are existing technologies and will not be elaborated upon in this application.

[0035] Therefore, the "stretch resistance reduction and compression resistance increase" characteristic allows CFMs to adaptively adjust their resistance according to the type of stress they are subjected to. Using CFMs as the auxiliary anode 3201, and leveraging their bidirectional variable resistance characteristic of decreasing resistance during stretching and increasing resistance during compression, adaptive brightness adjustment of the display panel under stretching conditions is achieved. Specifically, when the display panel is stretched, the resistance of the auxiliary anode 3201 automatically decreases, and the luminous intensity of the auxiliary pixel section 320 increases, compensating for the brightness decrease caused by the increased pixel pitch. This controls the luminous intensity of the auxiliary pixel section 320 to achieve dynamic compensation of the display area opening. Simultaneously, CFMs possess excellent mechanical durability, capable of withstanding stresses exceeding 10... 7 The fact that the resistance compensation function of this invention remains stable and reliable throughout the entire lifespan of the display panel without performance degradation after one stretch-release cycle ensures that the resistance compensation function of this invention remains stable and reliable throughout the entire lifespan of the display panel.

[0036] It should also be noted that the film formation method of conductive folded metamaterials can be selected according to specific process requirements, including but not limited to biomimetic electrospinning, solution method, vacuum filtration and transfer, laser direct writing or laser induction and other methods.

[0037] It should also be noted that during the material design phase, the resistance-strain characteristic curve of the conductive folded metamaterial can be preset by adjusting parameters such as its formulation, microstructure, thickness, and porosity, thereby determining the gradient and dynamic range of brightness compensation. This material-level compensation is inherent and passive, capable of instantaneous response when bending occurs, requiring no external control signal, and providing a stable and reliable basic framework for brightness management. Meanwhile, the display panel's driving circuit can also actively fine-tune the brightness control based on the inherent compensation of the conductive folded metamaterial by adjusting the anode or cathode voltage according to actual display needs. This active control mechanism can compensate for deviations caused by individual material differences, environmental changes, and long-term aging, further improving the accuracy of brightness control.

[0038] In some embodiments, the main pixel portion 310 includes a main anode 3101 disposed on the lower substrate 10, and the main anode 3101 and the auxiliary anode 3201 are arranged at intervals; the pixel unit 30 also includes an organic light-emitting functional layer 330 and a cathode 340, the organic light-emitting functional layer 330 continuously covers the side of the main anode 3101 away from the lower substrate 10 and the side of the auxiliary anode 3201 away from the lower substrate 10; the cathode 340 continuously covers the side of the organic light-emitting functional layer 330 away from the lower substrate 10; wherein, the main anode 3101, the organic light-emitting functional layer 330 covering the main anode 3101 and the cathode 340 together form the main pixel portion 310, and the auxiliary anode 3201, the organic light-emitting functional layer 330 covering the auxiliary anode 3201 and the cathode 340 together form the auxiliary pixel portion 320.

[0039] By arranging the main anode 3101 and the auxiliary anode 3201 alternately within the same opening area, and continuously covering them with the organic light-emitting functional layer 330 and the cathode 340, the main pixel portion 310 and the auxiliary pixel portion 320 share the same organic light-emitting functional layer 330 and the same cathode 340. This eliminates the need to fabricate the organic light-emitting functional layer 330 and cathode 340 separately for the auxiliary pixel portion 320, simplifying the vapor deposition and patterning processes and reducing manufacturing costs and complexity. Furthermore, sharing the same organic layer and cathode 340 avoids batch variations or uneven film thicknesses that might result from independent fabrication, ensuring consistency in the light-emitting material properties and electrical performance between the main pixel portion 310 and the auxiliary pixel portion 320. This eliminates the risk of color shift or luminous efficiency mismatch. On the other hand, the main anode 3101 and the auxiliary anode 3201 are arranged at intervals in the same opening area, integrating the compensation unit into the original pixel space without occupying additional planar area of ​​the display panel, thus avoiding a decrease in aperture ratio or physical resolution. The continuously covered organic light-emitting functional layer 330 and cathode 340 form a continuous film in the entire opening area and between adjacent opening areas. When the display panel is stretched, the tensile stress can be distributed more evenly, avoiding stress concentration or film tearing in the interval area between the main anode 3101 and the auxiliary anode 3201, which significantly improves the mechanical reliability and fatigue life under tension.

[0040] It should be noted that, as Figure 1 As shown, continuous coverage means that the organic light-emitting functional layer 330 and the cathode 340 are a single, uninterrupted thin film, simultaneously laid above the main anode 3101 and the auxiliary anode 3201, as well as the area between them. This continuous coverage ensures that the main pixel unit 310 and the auxiliary pixel unit 320 share the same organic light-emitting functional layer 330 and the same cathode 340, simplifying the process and ensuring uniform distribution of tensile stress, thus improving mechanical reliability. Furthermore, since the organic light-emitting functional layer 330 and the cathode 340 continuously cover the main anode 3101 and the auxiliary anode 3201, the main pixel unit 310 and the auxiliary pixel unit 320 effectively share the same hole transport layer, light-emitting layer, electron transport layer, and cathode 340 metal layer. This means that the light-emitting material characteristics (such as emission color, efficiency, and lifetime) of the auxiliary pixel unit 320 are completely consistent with those of the main pixel unit 310, avoiding color shifts or performance differences that might occur with separate fabrication. Meanwhile, the shared cathode 340 means that the auxiliary pixel 320 does not need a separate cathode 340 lead, the cathode 340 potential is globally unified, and the driving circuit design is simpler.

[0041] In some embodiments, the auxiliary anode 3201 includes a first anode segment 3202, a second anode segment 3203, and a third anode segment 3204; the first anode segment 3202 is disposed on the lower substrate 10; one end of the second anode segment 3203 is connected to the first anode segment 3202, and the other end extends through the sidewall of the non-opening area and extends in a direction away from the lower substrate 10 to the side of the non-opening area 210 away from the lower substrate 10; the third anode segment 3204 is disposed on the side of the non-opening area 210 away from the lower substrate 10 and is connected to the second anode segment 3203.

[0042] The first anode segment 3202 is disposed on the lower substrate 10, serving as the anode body of the auxiliary pixel portion 320, responsible for injecting holes into the organic light-emitting functional layer 330 covering it; the second anode segment 3203 is connected to the first anode segment 3202, extending through the sidewall of the non-opening area and in a direction away from the lower substrate 10 to the side of the non-opening area 210 away from the lower substrate 10. This through-path allows the auxiliary anode 3201 to cross the pixel definition layer 20, comprehensively sensing the overall tensile deformation from the lower substrate 10 to the upper encapsulation structure, avoiding compensation errors caused by sensing only the deformation of a single layer, and the second anode The way segment 3203 is inserted into the non-opening area 210 makes full use of the three-dimensional space of the non-opening area 210, so as not to sacrifice the light-emitting area of ​​the main pixel. The third anode segment 3204 is set on the side of the non-opening area 210 away from the lower substrate 10 and connected to the second anode segment 3203. This provides a structural basis for subsequent electrical connection with the backplate anode signal input terminal 50 through the deep hole inside the isolation pillar. This allows the backplate driving signal to be introduced into the auxiliary anode 3201. At the same time, it serves as a connection node and top contact point with the second anode segment 3203, ensuring the stability of signal transmission and low resistance characteristics.

[0043] It should be noted that the non-opening area 210 refers to the three-dimensional space occupied by the isolation pillar entity formed by the protrusion of the pixel definition layer 20 between adjacent opening areas.

[0044] In some embodiments, the second anode segment 3203 is disposed at an angle relative to the lower substrate 10.

[0045] By tilting the second anode segment 3203 relative to the lower substrate 10, the mechanical reliability and electrical performance of the auxiliary anode 3201 can be significantly improved. Specifically, the tilted structure avoids the steep steps and stress concentration that might result from the vertical insertion of the second anode segment 3203. When the display panel is stretched, the tilted second anode segment 3203 can more smoothly disperse the tensile stress through angle changes and local bending, reducing the risk of material fatigue fracture and thus improving the durability of the auxiliary anode 3201 under repeated stretch-recovery cycles. At the same time, the tilted path increases the effective length of the second anode segment 3203 in the non-opening area 210, resulting in a more significant and linear resistance change under the same stretching amount. This facilitates a more accurate and stable stretching degree-resistance correspondence, thereby improving the grayscale fineness of brightness compensation. Furthermore, the tilted arrangement makes the transition of the auxiliary anode 3201 from the opening area to the top of the non-opening area 210 smoother, reducing signal transmission reflection and loss, and helping to maintain good electrical continuity.

[0046] It should be noted that in the initial state where the display panel is not stretched, the second anode segment 3203 is in a relaxed stacked state within the non-opening area 210. Relaxed stacking means that the second anode segment 3203 is not in a taut, straight line, but rather has a certain degree of curvature, wave-like or wrinkled allowance, and may even be in a multi-layered stacked configuration. This relaxed stacking design provides sufficient deformation space for stretching: when the display panel is stretched, the relaxed portion in the second anode segment 3203 is gradually straightened and unfolded, thereby achieving continuous change in resistance value within a relatively wide stretching range.

[0047] It should also be noted that the inclined second anode section extends the deformation area. The longer the deformation area, the more deformation stages it can accommodate, and the number of resistance change steps also increases accordingly. This allows for matching brightness compensation for finer grayscale division, effectively improving the brightness separation at low grayscale levels, making grayscale transitions smoother and more natural, and significantly enhancing display detail.

[0048] In some embodiments, the display panel further includes an isolation protrusion 40 disposed on the lower substrate 10, the isolation protrusion 40 being located between the main anode 3101 and the auxiliary anode 3201, and the organic light-emitting functional layer 330 covering the isolation protrusion 40.

[0049] By disposing an isolation protrusion 40 between the main anode 3101 and the auxiliary anode 3201, and covering it with an organic light-emitting functional layer 330, the phenomenon of the same color stealing between the main pixel 310 and the auxiliary pixel 320 can be effectively suppressed in the unstretched state. Specifically, the isolation protrusion 40 causes the thickness of the organic light-emitting functional layer 330 covering it to be drastically thinned or even discontinuous in this area, thereby significantly increasing the path resistance of holes diffusing laterally from the main anode 3101 to the auxiliary anode 3201. At the same time, the isolation protrusion 40 physically blocks the straight migration channel of charge carriers, making it difficult for holes injected into the main anode 3101 to reach the auxiliary anode 3201 area. Since the auxiliary anode 3201 itself is in a high-resistance or floating state when unstretched, it cannot provide enough holes for electron recombination. In addition, the isolation protrusion 40 further blocks the lateral diffusion of holes, thereby ensuring that the auxiliary pixel 320 hardly emits light when the display panel is not stretched, and will not interfere with the normal display screen. This structural design not only realizes the simplified process advantage of the main pixel section 310 and the auxiliary pixel section 320 sharing the organic light-emitting functional layer 330, but also avoids the crosstalk problem that may be caused by the shared layer, ensuring high contrast and image clarity of the display panel in a static (unstretched) state.

[0050] It should be noted that the isolation protrusion 40 is integrally formed from the material of the flexible insulating layer 92. The flexible insulating layer 92 is disposed between the lower substrate 10 and the pixel definition layer 20. During the fabrication of the flexible insulating layer 92, an additional raised structure with a certain height and width is retained or protruded above the gap area between the main anode 3101 and the auxiliary anode 3201, namely the isolation protrusion 40. The function of the isolation protrusion 40 is to block the lateral diffusion of holes from the main anode 3101 to the auxiliary anode 3201 in the unstretched state, preventing the same-color light leakage. To achieve this effect, the isolation protrusion 40 needs to have sufficient steepness or a hanging structure, so that the thickness of the subsequently deposited organic light-emitting functional layer 330 is significantly reduced or even broken at its sidewalls and top, thereby forming a high-resistance region and effectively inhibiting the migration of holes across the isolation protrusion 40 to the auxiliary anode 3201 region. At the same time, since the isolation protrusion 40 is integrally formed from the material of the flexible insulating layer 92, its mechanical properties (such as elastic modulus and elongation at break) are consistent with those of the flexible insulating layer 92 body. When the display panel is stretched, the isolation protrusion 40 can deform in coordination with the flexible insulating layer 92, avoiding stress concentration or cracks due to excessive local stiffness, and ensuring the structural reliability under tension.

[0051] In some embodiments, the display panel further includes an insulating partition 93, which covers at least a portion of the side of the first anode segment 3202 facing away from the lower substrate 10 and at least a portion of the side of the second anode segment 3203 facing the opening area; the edge of the organic light-emitting functional layer 330 is adjacent to the insulating partition 93, and the cathode 340 covers at least a portion of the insulating partition 93.

[0052] By covering the insulating partition 93 with the first anode segment 3202 and the second anode segment 3203, and making the edge of the organic light-emitting functional layer 330 adjacent to the insulating partition 93, the effective light-emitting area of ​​the auxiliary pixel segment 320 is defined—that is, the organic light-emitting functional layer 330 is only in direct contact with the portion of the first anode segment 3202 not covered by the insulating partition 93, and holes can only be injected from this area. This avoids edge light leakage or non-uniform light emission caused by uneven anode edges or diffusion of organic layer coating, and improves the clarity of the light emission boundary and brightness uniformity of the auxiliary pixel segment 320. At the same time, the insulating partition 93 covers the side of the second anode segment 3203, which can prevent carrier injection or leakage current that may be generated on the sidewall of the second anode segment 3203, further reducing energy loss in the non-light-emitting area. The cathode 340 continuously covers the insulating partition 93, so that the cathode 340 maintains electrical continuity over the entire surface area, without affecting its function as a common electrode. Furthermore, during the stretching process, the interface between the cathode 340 and the insulating partition 93 can deform in tandem, avoiding stress concentration or peeling due to film discontinuity.

[0053] It should be noted that a flexible insulating layer 92 is provided between the lower substrate 10 and the pixel definition layer. On the one hand, it is used to planarize the surface morphology of the lower substrate 10, providing a flat base for the subsequent fabrication of the auxiliary anode and pixel definition layer, etc. On the other hand, the flexible insulating layer 92 has good flexibility and tensile properties, which can buffer the interlayer stress of the multilayer film structure when bent or stretched, and prevent film cracking or peeling caused by deformation mismatch. In addition, the insulating partition 93 is integrally formed from the material of the flexible insulating layer 92. Specifically, during the fabrication of the flexible insulating layer 92, at least a portion of the upper surface of the first anode segment 3202 and the side of the second anode segment 3203 facing the opening area are reserved or additionally formed with protruding insulating structures, thereby constituting the insulating partition 93.

[0054] In some embodiments, the display panel further includes an anode signal input terminal 50 disposed on the lower substrate 10. The anode signal input terminal 50 and the non-opening area 210 are disposed opposite to each other in a direction perpendicular to the lower substrate 10. A conductive path 60 is formed in the non-opening area 210. The anode signal input terminal 50 is electrically connected to the third anode segment 3204 through the conductive path 60.

[0055] By placing the anode signal input terminal 50 inside the non-opening area 210, the three-dimensional space below the isolation pillar is fully utilized without occupying the area of ​​the opening area, thus avoiding a reduction in the aperture ratio or pixel density of the display panel due to the addition of signal lines. Simultaneously, the conductive path 60 formed within the non-opening area 210 achieves a vertical electrical connection from the backplate to the top of the isolation pillar, directly connecting the anode signal input terminal 50 to the top section of the auxiliary anode 3201 located at the top. This significantly shortens the signal transmission path, reduces wiring resistance and signal delay, and is beneficial for improving the response speed and driving stability of the auxiliary pixel section 320. Furthermore, this conductive path 60 is surrounded by the pixel definition layer 20 material, providing excellent electrical insulation and shielding effects, effectively reducing electromagnetic crosstalk with adjacent pixels or signal lines, and ensuring the purity of the driving signal. In addition, the anode signal input terminal 50 is located at the bottom of the isolation pillar and the top section of the auxiliary anode 3201 is located at the top of the isolation pillar. The two are connected by the internal conductive path 60, so that the overall structure of the auxiliary anode 3201 (including the bottom section located on the substrate, the middle section passing through the non-opening area 210, and the top section located at the top of the non-opening area 210, plus the conductive path 60) forms a continuous electrical channel from the back plate to the light-emitting area and then to the top. This not only realizes the stretch deformation sensing function, but also ensures the reliable injection of the driving signal. No additional wiring is required, which simplifies the layout design of the panel.

[0056] It should be noted that the "lower substrate 10" mentioned in this invention refers to the support substrate at the bottom of the display panel. A TFT backplane circuit layer is formed on the lower substrate 10, which includes thin-film transistors, capacitors, and metal traces. The anode signal input terminal 50 is a part of the TFT backplane circuit layer, for example, it can be an extension of the drain or source of the driving transistor corresponding to the auxiliary pixel 320, or an independent metal pad. The anode signal input terminal 50 is responsible for transmitting the driving voltage to the auxiliary anode 3201. The anode signal input terminal 50 is deliberately located inside the non-aperture area 210, specifically at the bottom of the non-aperture area 210 near the lower substrate 10, and is covered by the pixel definition layer 20 material. This ensures that the anode signal input terminal 50 does not occupy the area of ​​the aperture area, thereby maintaining the high aperture ratio of the main pixel 310 and shortening the distance to the conductive path 60.

[0057] It should also be noted that, such as Figure 1As shown, the conductive path 60 is a deep hole penetrating the non-opening region 210, filled with a conductive material, such as metals like tungsten, titanium, or copper, or conductive polymers or nano-silver paste. The deep hole can be fabricated in the pixel definition layer 20 using photolithography and etching processes, and then filled with the conductive material via chemical vapor deposition or electroplating. Regardless of the form of the conductive path 60, it must ensure good electrical continuity, low resistance, and reliable ohmic contact with the anode signal input terminal 50 and the third anode segment 3204.

[0058] In some embodiments, the display panel further includes an encapsulation layer 70, which covers the side of the cathode 340 facing away from the lower substrate 10, the side of the third anode segment 3204 facing away from the lower substrate 10, and the side of the non-opening area 210 facing away from the lower substrate 10.

[0059] By simultaneously covering the side of the cathode 340 facing away from the lower substrate 10, the side of the third anode segment 3204 facing away from the lower substrate 10, and the side of the non-opening area 210 facing away from the lower substrate 10 with the encapsulation layer 70, a comprehensive sealed protection is formed for the top area of ​​the display panel, preventing water and oxygen intrusion that could lead to corrosion of the edges of the organic light-emitting functional layer 330 and the cathode 340. In this solution, the encapsulation layer 70 continuously covers these areas, eliminating uncovered interfaces and dead corners, significantly improving encapsulation reliability. Meanwhile, the third anode segment 3204 is located on top of the non-opening area 210, directly covered by the encapsulation layer 70, preventing the third anode segment 3204 from being exposed to air and oxidized or corroded, ensuring the long-term stability of the electrical connection between the auxiliary anode 3201 and the backplane signal input terminal. Furthermore, the top of the non-opening area 210 typically has a raised morphology; the encapsulation layer 70 covering this area can fill in the surface unevenness, providing a flat substrate for the subsequent flexible substrate 80 or color resist layer 90, which is beneficial for improving the adhesion and uniformity of the upper structure. In addition, the encapsulation layer 70 covers the cathode 340, the third anode section 3204, and the non-opening area 210, which means that during the stretching process, the encapsulation layer 70 and the underlying layers form an integrated composite film layer that can work together to withstand tensile stress and avoid relative slippage or delamination caused by inconsistent deformation of each layer, thereby improving the mechanical durability and service life of the entire display panel in repeated stretching-recovery cycles.

[0060] It should be noted that the encapsulation layer 70 includes an organic encapsulation layer 720 and an inorganic encapsulation layer 710 stacked together. The organic encapsulation layer 720 covers the side of the cathode 340 facing away from the lower substrate 10, the side of the third anode segment 3204 facing away from the lower substrate 10, and the side of the non-opening region 210 facing away from the lower substrate 10. The inorganic encapsulation layer 710 covers the side of the organic encapsulation layer 720 facing away from the lower substrate 10. The organic encapsulation layer 720 is used to provide flexibility and stress buffering, and the material of the organic encapsulation layer 720 can be selected from acrylate, epoxy resin, polyimide, etc. The inorganic encapsulation layer 710 is used to provide water and oxygen barrier, and the material of the inorganic encapsulation layer 710 can be selected from silicon nitride (SiNx), silicon oxide (SiOx), aluminum oxide (AlOx), etc.

[0061] In some embodiments, the display panel further includes a flexible substrate 80 and a color resist layer 90; the flexible substrate 80 is stacked and covers the side of the encapsulation layer 70 away from the lower substrate 10; the color resist layer 90 is disposed on the side of the flexible substrate 80 away from the lower substrate 10, and the color resist layer 90 includes a plurality of color resist portions 910, each color resist portion 910 corresponding to a pixel unit 30, and two adjacent color resist portions 910 are adjacent to each other above the non-opening area 210.

[0062] By layering a flexible substrate 80 over the encapsulation layer 70, an independent substrate is provided for the color resist layer 90. This allows the fabrication of the color resist layer 90 to be independent of the underlying cathode 340, organic light-emitting functional layer 330, and anode structure, avoiding potential encapsulation damage or stress concentration that might occur from directly processing the color resist on the encapsulation layer 70. Simultaneously, the flexible substrate 80 itself possesses a certain degree of flexibility and stretchability, which can buffer the strain difference between the encapsulation layer 70 and the color resist layer 90 during stretching, preventing cracks or peeling caused by interlayer deformation mismatch. The color resist layer 90 is disposed on the flexible substrate 80, and the color resist portion 910 corresponds one-to-one with the pixel unit 30, ensuring that the light emitted by each pixel unit 30 can be accurately filtered by the corresponding color resist, achieving full-color display. By having two adjacent color resist portions 910 adjacent to each other above the non-opening area 210, the black matrix located between color resists in the traditional structure is eliminated, thereby eliminating the absorption loss of light by the black matrix and improving the light extraction efficiency and overall brightness of the display panel. Since the black matrix is ​​usually made of a brittle material, it is prone to cracking during stretching. In this solution, the structure of the color resist 910 directly adjacent to each other without a black matrix significantly improves the mechanical reliability of the color resist layer 90 under repeated stretching, avoiding display defects caused by the breakage of the black matrix. In addition, the color resist 910 is adjacent above the non-aperture area 210, making full use of the space of the non-aperture area 210, so that the area of ​​the color resist 910 can be slightly larger than the aperture area, thereby tolerating photolithographic alignment errors and ensuring that the aperture area is completely covered without light leakage. The adjacent color resist 910s are also adjacent to each other, which effectively prevents lateral light crosstalk between different color pixels, because the adjacent color resist boundary can absorb or reflect stray light, replacing the light-blocking function of the black matrix.

[0063] It should be noted that the flexible substrate 80 may be made of polyimide or other stretchable polymer materials.

[0064] It should also be noted that the color resist layer 90 includes multiple color resist sections 910, typically red, green, and blue, each corresponding to a different color pixel unit 30. Each color resist section 910 can selectively transmit light in the wavelength band corresponding to its color and absorb light in other wavelength bands. For example, the red resist section only allows red light to pass through, while absorbing green and blue light. By aligning the color resist sections 910 of different colors with their corresponding pixel units 30, independent color display of red, green, and blue pixel units is achieved. Furthermore, one-to-one correspondence means that each color resist section 910 is aligned with one pixel unit 30 in the height direction, so that the light emitted by that pixel unit 30 mainly passes through its corresponding color resist section 910. Since the auxiliary pixel unit 320 and the main pixel unit 310 are located in the same opening area and emit the same color light, they share the same color resist section 910, and there is no need to set a separate color resist for the auxiliary pixel unit 320.

[0065] It should be noted that a functional film 91 is also provided on the side of the color resist layer 90 facing away from the lower substrate 10. The functional film 91 is attached to the color resist layer 90 by an optical adhesive layer. The functional film 91 can be a circular polarizer to suppress ambient light reflection and improve contrast and visibility in strong light environments; or it can be a touch sensor film to realize touch sensing function.

[0066] This application also provides a display device, including the display panel provided in the foregoing embodiments of this application.

[0067] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0068] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0069] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A display panel, characterized in that, include: lower base plate; A pixel definition layer is protruding from one side of the lower substrate. The pixel definition layer includes a plurality of spaced-apart opening areas and a non-opening area located between two adjacent opening areas. A pixel unit includes a main pixel portion and an auxiliary pixel portion located in the same opening area and arranged adjacent to each other. The auxiliary pixel portion includes an auxiliary anode disposed on the lower substrate. The auxiliary anode extends from the opening area through the sidewall of the non-opening area in a direction away from the lower substrate to the side of the non-opening area away from the lower substrate. When the display panel is stretched, the resistance of the auxiliary anode decreases as the stretching of the display panel increases, thereby enhancing the luminous intensity of the auxiliary pixel portion.

2. The display panel according to claim 1, characterized in that, The auxiliary anode is formed of a conductive folded metamaterial; wherein the conductive folded metamaterial has an increased resistance when compressed and a decreased resistance when stretched.

3. The display panel according to claim 1, characterized in that, The main pixel portion includes a main anode disposed on the lower substrate, and the main anode and the auxiliary anode are arranged at intervals. The pixel unit further includes an organic light-emitting functional layer and a cathode. The organic light-emitting functional layer continuously covers the side of the main anode facing away from the lower substrate and the side of the auxiliary anode facing away from the lower substrate. The cathode continuously covers the side of the organic light-emitting functional layer facing away from the lower substrate. The main anode, together with the organic light-emitting functional layer covering the main anode and the cathode, forms the main pixel portion, and the auxiliary anode, together with the organic light-emitting functional layer covering the auxiliary anode and the cathode, forms the auxiliary pixel portion.

4. The display panel according to claim 3, characterized in that, The auxiliary anode includes: The first anode section is disposed on the lower substrate; The second anode section has one end connected to the first anode section, and the other end extends through the sidewall of the non-opening area and in a direction away from the lower substrate to the side of the non-opening area away from the lower substrate. The third anode segment is disposed on the side of the non-opening area away from the lower substrate and is connected to the second anode segment.

5. The display panel according to claim 4, characterized in that, The second anode segment is inclined relative to the lower substrate.

6. The display panel according to claim 3, characterized in that, The display panel further includes an isolation protrusion disposed on the lower substrate, the isolation protrusion being located between the main anode and the auxiliary anode, and the organic light-emitting functional layer covering the isolation protrusion.

7. The display panel according to claim 4, characterized in that, The display panel further includes an insulating partition that covers at least a portion of the side of the first anode segment away from the lower substrate and at least a portion of the side of the second anode segment facing the opening area; the edge of the organic light-emitting functional layer is adjacent to the insulating partition, and the cathode covers at least a portion of the insulating partition.

8. The display panel according to claim 4, characterized in that, The display panel further includes an anode signal input terminal disposed on the lower substrate. The anode signal input terminal and the non-opening area are disposed opposite each other in a direction perpendicular to the lower substrate. A conductive path is formed in the non-opening area. The anode signal input terminal is electrically connected to the third anode segment through the conductive path.

9. The display panel according to claim 4, characterized in that, The display panel also includes: An encapsulation layer covers the side of the cathode facing away from the lower substrate, the side of the third anode segment facing away from the lower substrate, and the side of the non-opening area facing away from the lower substrate. A flexible substrate is stacked and covers the side of the encapsulation layer opposite to the lower substrate; A color resist layer is disposed on the side of the flexible substrate away from the lower substrate. The color resist layer includes a plurality of color resist portions, each of which corresponds to a pixel unit, and two adjacent color resist portions are adjacent to each other above the non-opening area.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

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