Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a substrate, a light-emitting layer, a first inorganic encapsulation layer, a second organic encapsulation layer, a filter layer and a raised structure. The first inorganic encapsulation layer and the second organic encapsulation layer form encapsulation for the light-emitting layer. The filter layer and the light-emitting unit are arranged correspondingly. The second organic encapsulation layer comprises a first main body part and a first thinning part, the first thinning part is arranged around the first main body part, and the thickness of the first thinning part is smaller than that of the first main body part. The raised structure is arranged between the first thinning part and the first inorganic encapsulation layer, the raised structure raises the part of the first thinning part located in the display area, improves the slope of the part of the first thinning part located in the display area, reduces the thickness difference between the part of the filter layer on the first main body part and the part of the filter layer on the first thinning part, improves the material thickness uniformity of the filter layer, and improves the use performance of the display panel.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] This application provides a display panel and a display device, which aim to improve the performance of OLED display products.

[0005] A first aspect of this application provides a display panel having adjacent display areas and non-display areas. The display panel includes: a substrate; a light-emitting layer located on one side of the substrate, the light-emitting layer including a plurality of spaced-apart light-emitting units located in the display area; a first inorganic encapsulation layer located on the side of the light-emitting layer away from the substrate; a second organic encapsulation layer located on the side of the first inorganic encapsulation layer away from the substrate, the second organic encapsulation layer including a first main body portion and a first thinning portion, the first thinning portion being disposed around the first main body portion and having a thickness less than the thickness of the first main body portion; a light filter layer located on the side of the second organic encapsulation layer away from the substrate, the light filter layer including a plurality of light filter portions, the light filter portions being disposed corresponding to the light-emitting units; and a raised structure located between the first inorganic encapsulation layer and the first thinning portion, at least a portion of the raised structure being located within the display area, the orthographic projection of the raised structure onto the substrate being outside the orthographic projection of the light-emitting units onto the substrate.

[0006] According to an embodiment of the first aspect of this application, the raised structure is in the form of a grid.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the raised structure encloses and forms a light-transmitting opening, and the orthogonal projection of the light-emitting unit on the substrate is located within the orthogonal projection of the light-transmitting opening on the substrate.

[0008] According to any of the foregoing embodiments of the first aspect of this application, there are multiple raised structures, and the multiple raised structures are arranged at intervals.

[0009] According to any of the foregoing embodiments of the first aspect of this application, a plurality of raised structures are spaced apart along the direction from the display area to the non-display area.

[0010] According to any of the foregoing embodiments of the first aspect of this application, a single raised structure is enclosed in a closed loop.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the plurality of raised structures tends to increase along the direction from the display area to the non-display area, or the thickness of the plurality of raised structures is the same.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the plurality of raised structures gradually increases along the direction from the display area to the non-display area.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a dam located on one side of the substrate and in the non-display area, and a second organic encapsulation layer located on the side of the dam facing the display area.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the elevation structure includes a first elevation portion and a second elevation portion, the first elevation portion being located in the display area, and the second elevation portion being located in the non-display area and on the side of the dam facing the display area.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the non-display area further includes a virtual pixel area located between the dam display areas, at least a portion of the second raised portion is located within the virtual pixel area, and the light-emitting layer further includes virtual units located within the virtual pixel area.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the non-display area further includes a reset signal area located between the dam display areas, at least a portion of the second raised portion is located within the reset signal area, and a reset signal line is provided within the reset signal area.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the non-display area further includes a gate driving region located between the dam display areas, at least a portion of the second raised portion is located within the gate driving region, and a shift register is provided within the gate driving region.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the first raised portion is greater than or equal to the thickness of the second raised portion.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the first raised portion is greater than the thickness of the second raised portion.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the ratio of the thickness of the raised structure to the maximum thickness of the second organic encapsulation layer is 0.01 to 0.6.

[0021] An embodiment of the second aspect of this application provides a display device that includes a display module of any of the above embodiments.

[0022] According to an embodiment of this application, the display panel includes a display area and a non-display area, with the display area used to realize the light-emitting display of the display panel. The display panel includes a substrate, a light-emitting layer, a first inorganic encapsulation layer, a second organic encapsulation layer, a filter layer, and a raised structure. The first inorganic encapsulation layer and the second organic encapsulation layer encapsulate the light-emitting layer. A filter and a light-emitting unit are correspondingly disposed; the filter precisely filters non-target wavelength light, reduces color interference, and ensures pure color output from the light-emitting unit, thereby improving color saturation and contrast. The second organic encapsulation layer includes a first main body and a first thinning portion. The first thinning portion is disposed around the first main body, and the thickness of the first thinning portion is less than the thickness of the first main body, i.e., the first thinning portion is recessed relative to the first main body and has a certain slope. During the fabrication of the filter layer, the filter layer is thinned at the first thinning section. A padding structure is set between the first thinning section and the first inorganic encapsulation layer. The padding structure raises the portion of the first thinning section located in the display area, improving the leveling slope of the portion of the first thinning section located in the display area, reducing the thickness difference between the portion of the filter layer on the first main body and the portion on the first thinning section, and improving the uniformity of the material thickness of the filter layer. This improves the problem of the filter layer becoming thinner at the first thinning section due to the large slope of the first thinning section, resulting in increased transmittance of the thinned filter layer and insufficient light output at the edge of the display area when the display panel is lit, thus improving the performance of the display panel. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0024] Figure 1 This is a top view schematic diagram of a display panel provided in the first aspect embodiment of this application;

[0025] Figure 2 This is a partial cross-sectional view of a display panel provided in the first aspect embodiment of this application;

[0026] Figure 3 This is a top view schematic diagram of a display panel provided in another embodiment;

[0027] Figure 4 This is a top view schematic diagram of a display panel provided in yet another embodiment;

[0028] Figure 5 This is a partial cross-sectional view of a display panel provided in another embodiment;

[0029] Figure 6 This is a partial cross-sectional view of a display panel provided in yet another embodiment;

[0030] Figure 7 This is a partial cross-sectional view of a display panel provided in another embodiment;

[0031] Figure 8 This is a partial cross-sectional view of a display panel provided in another embodiment.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Display panel; AA, display area; NA, non-display area; NA1, virtual pixel area; NA2, reset signal area; NA3, gate drive area;

[0034] 100. Substrate;

[0035] 200, Light-emitting layer; 210, Light-emitting unit;

[0036] 300. First inorganic encapsulation layer;

[0037] 400, Second organic encapsulation layer; 410, First main body portion; 420, First thinning portion;

[0038] 500, Filter layer; 510, Filter section; 520, Black matrix;

[0039] 600. Elevated structure; 601. First elevated part; 602. Second elevated part; 610. Light-transmitting opening;

[0040] 700. Dam;

[0041] 800, Pixel definition layer; 810, Pixel limiting part; 820, Pixel opening; 830, First electrode; 840, Second electrode layer. Detailed Implementation

[0042] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0044] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0045] With the continuous development of science and technology, various display devices have been widely used in people's lives and work, bringing great convenience to people's daily lives.

[0046] As one of the important components of a display device, the structural design of the display panel directly or indirectly affects the display effect of the display device.

[0047] During the formation of the encapsulation layer of the display panel, the second organic encapsulation layer in the encapsulation layer is formed by IJP (InkJet Printing). Therefore, in this technical field, the second organic encapsulation layer can also be referred to as the IJP layer.

[0048] During the formation of the IJP layer, the reflow phenomenon of the monomers causes a height difference between the middle and edge regions of the IJP layer. In other words, the thickness of the edge region of the IJP layer gradually decreases in the direction from the display area to the non-display area.

[0049] The edge region of the IJP layer is partly located within the display area and partly within the non-display area. It can be observed that the thickness of the edge region of the IJP layer located within the display area gradually decreases in the direction from the display area to the non-display area. In other words, the surface of this part of the IJP layer facing away from the substrate is not flat and will appear sloping.

[0050] If a filter layer is formed directly on the surface of the IJP layer facing away from the substrate, the color resist material will also flow during the formation of the filter layer. This will cause the thickness of the filter layer in the edge area of ​​the display area to be less than the thickness of the filter layer in the middle area of ​​the display area, resulting in higher brightness in the edge area of ​​the display area and a brightness difference between the edge area and the middle area of ​​the display area.

[0051] Based on the technical problems existing in the prior art, this application provides a display panel and a display device. By forming a raised structure to adjust the flatness, the IJP layer is adjusted so that the surface of the IJP layer in the edge area of ​​the display area is parallel to the plane of the substrate, or the surface of the IJP layer in the edge area of ​​the display area is infinitely close to the plane, thereby reducing the thickness difference of the IJP layer in the edge area of ​​the display area. This reduces the thickness difference of the filter layer in the edge area and the middle area of ​​the display area, thereby balancing the brightness difference between the edge area and the middle area of ​​the display area, and ultimately improving the performance of the display panel.

[0052] Therefore, in order to solve the problem of brightness difference between the edge and center areas of the display area, this application provides a display panel and a display device. The embodiments of the display panel and display device will be described below with reference to the accompanying drawings. The display panel may be an organic light-emitting diode (OLED) display panel.

[0053] Please see Figure 1 and Figure 2 , Figure 1 This is a top view schematic diagram of a display panel provided in the first aspect embodiment of this application; Figure 2 This is a partial cross-sectional view of a display panel provided in the first aspect of this application.

[0054] like Figure 1 and Figure 2As shown, a first aspect of this application provides a display panel 10, which has adjacent display areas AA and non-display areas NA. The display panel 10 includes: a substrate 100; a light-emitting layer 200 located on one side of the substrate 100, the light-emitting layer 200 including a plurality of light-emitting units 210 spaced apart and located in the display areas AA; a first inorganic encapsulation layer 300 located on the side of the light-emitting layer 200 away from the substrate 100; and a second organic encapsulation layer 400 located on the side of the first inorganic encapsulation layer 300 away from the substrate 100, the second organic encapsulation layer 400 including a first main body portion 410 and a first thinning portion 42. 0. The first thinning portion 420 is disposed around the first main body portion 410, and the thickness of the first thinning portion 420 is less than the thickness of the first main body portion 410; the filter layer 500 is located on the side of the second organic encapsulation layer 400 away from the substrate 100, and the filter layer 500 includes a plurality of filter portions 510, which are disposed corresponding to the light-emitting unit 210; the padding structure 600 is located between the first inorganic encapsulation layer 300 and the first thinning portion 420, and at least part of the padding structure 600 is located within the display area AA, and the orthogonal projection of the padding structure 600 on the substrate 100 is outside the orthogonal projection of the light-emitting unit 210 on the substrate 100.

[0055] According to an embodiment of this application, the display panel 10 includes a display area AA and a non-display area NA. The display area AA is used to realize the light emission display of the display panel 10. The display panel 10 includes a substrate 100, a light-emitting layer 200, a first inorganic encapsulation layer 300, a second organic encapsulation layer 400, a filter layer 500, and a raised structure 600. The first inorganic encapsulation layer 300 and the second organic encapsulation layer 400 encapsulate the light-emitting layer 200. The filter portion 510 and the light-emitting unit 210 are correspondingly disposed. The filter portion 510 accurately filters non-target wavelength light, reduces color interference, and ensures the purity of the color output of the light-emitting unit 210, thereby improving color saturation and contrast. The second organic encapsulation layer 400 includes a first main body portion 410 and a first thinning portion 420. The first thinning portion 420 is disposed around the first main body portion 410, and the thickness of the first thinning portion 420 is less than the thickness of the first main body portion 410, that is, the first thinning portion 420 is recessed relative to the first main body portion 410 and has a certain slope. During the fabrication of the filter layer 500, the filter layer 500 is thinned at the position of the first thinning portion 420. A padding structure 600 is provided between the first thinning portion 420 and the first inorganic encapsulation layer 300. The padding structure 600 raises the portion of the first thinning portion 420 located in the display area AA, improves the leveling slope of the portion of the first thinning portion 420 located in the display area AA, reduces the thickness difference between the portion of the filter layer 500 on the first main body portion 410 and the portion on the first thinning portion 420, and improves the uniformity of the material thickness of the filter layer 500. This improves the problem of the filter layer 500 becoming thinner at the position of the first thinning portion 420 due to the large slope of the first thinning portion 420, resulting in increased transmittance of the thinned filter layer 500 and reduced edge light emission of the display area AA of the display panel 10 when the display panel 10 is lit, thereby improving the performance of the display panel 10.

[0056] The projection of the raised structure 600 onto the substrate 100 is outside the projection of the light-emitting unit 210 onto the substrate 100. That is, the raised structure 600 is set away from the light-emitting unit 210 to avoid blocking the light emission of the light-emitting unit 210 and to ensure the display effect of the display panel 10.

[0057] The corresponding arrangement of the filter section 510 and the light-emitting unit 210 means that the orthographic projection of the light-emitting unit 210 onto the substrate 100 is located within the orthographic projection of the filter section 510 onto the substrate 100, or the orthographic projection of the light-emitting unit 210 onto the substrate 100 overlaps with the orthographic projection of the filter section 510 onto the substrate 100. For example, the filter section 510 includes a red filter, a green filter, and a blue filter. The light-emitting unit 210 includes a red light-emitting unit 210, a green light-emitting unit 210, and a blue light-emitting unit 210. Optionally, the orthographic projection of the red light-emitting unit 210 onto the substrate 100 is located within the orthographic projection of the red filter onto the substrate 100. Optionally, the orthographic projection of the green light-emitting unit 210 onto the substrate 100 is located within the orthographic projection of the green filter onto the substrate 100. Optionally, the orthographic projection of the blue light-emitting unit 210 onto the substrate 100 is located within the orthographic projection of the blue filter onto the substrate 100.

[0058] In this application, the thickness of each structure refers to the dimension along the thickness direction of the display panel 10.

[0059] There are several ways to set up the non-display area NA. For example, the non-display area NA can be a light-transmitting area, with the display area AA surrounding it. The non-display area NA is used to allow ambient light to pass through so that the photosensitive element can obtain ambient light information. For example, an under-display camera module can be set up in the non-display area NA. Alternatively, the non-display area NA can be the bezel area of ​​the display panel 10, with the bezel area surrounding the display area AA.

[0060] There are several other ways to configure the substrate 100. For example, the substrate 100 may include a substrate and an array substrate disposed on the substrate. The array substrate includes multiple metal layers and an insulating layer that is at least partially located in the display area AA. Alternatively, the substrate 100 may be the substrate itself. Or the substrate 100 may include a buffer layer and a support plate on the side facing away from the substrate.

[0061] Optionally, the first inorganic encapsulation layer 300 is made of inorganic materials. Optionally, the second organic encapsulation layer 400 is made of organic materials. Optionally, the display panel 10 further includes a third inorganic encapsulation layer, which is located between the second organic encapsulation layer 400 and the light filter layer 500. Optionally, the third inorganic encapsulation layer is made of inorganic materials.

[0062] Optionally, the display panel 10 further includes a pixel definition layer 800 located between the substrate 100 and the first inorganic encapsulation layer 300, including a pixel defining portion 810 and a plurality of pixel openings 820 enclosed by the pixel defining portion 810. A light-emitting unit 210 is disposed within the pixel openings 820 in the display area AA. The pixel defining portion 810 defines the light-emitting area of ​​the display area AA, and the light-emitting unit 210 is disposed within the pixel openings 820 to achieve light-emitting display.

[0063] Optionally, the pixel definition layer 800 can be a single-layer or multi-layer structure.

[0064] Optionally, the material of the pixel limiting part 810 may include organic or inorganic materials.

[0065] Optionally, the material of the pixel definition layer 800 includes at least one of silicon oxide, silicon nitride, and silicon oxynitride.

[0066] Optionally, a black matrix 520 is provided between adjacent filter sections 510 to avoid color mixing between adjacent filter sections 510.

[0067] Please see Figure 2 and Figure 3 , Figure 3 This is a top view of a display panel provided in another embodiment.

[0068] like Figure 2 and Figure 3 As shown, in some optional embodiments, the raised structure 600 is in the form of a grid.

[0069] In these optional embodiments, the mesh design, through its continuous and regular mesh distribution, forms a uniform support surface at the edge of the display area AA, avoiding localized stress concentration or gap problems that may occur with traditional discrete padding structures 600. This integrated structure can more effectively improve the leveling slope of the first thinning section 420, thereby ensuring the uniformity of the filter layer 500 thickness and reducing edge brightening caused by differences in the thickness of the filter layer 500. The gap design of the mesh structure reduces the amount of material used in the padding structure 600 while ensuring support strength, thus lowering manufacturing costs. In addition, the breathability and gap distribution of the mesh facilitate solvent evaporation and uniform material spreading during IJP coating, avoiding defects (such as bubbles or cracks) caused by localized accumulation or poor flow, and improving manufacturing yield. By precisely controlling the position and spacing of the mesh nodes, the mesh design can effectively support the filter layer 500 while completely avoiding the projection area of ​​the light-emitting unit 210, ensuring that luminous efficiency and display effect are not affected.

[0070] like Figure 3 As shown, in some optional embodiments, the raised structure 600 encloses to form a light-transmitting opening 610, and the orthographic projection of the light-emitting unit 210 on the substrate 100 is located within the orthographic projection of the light-transmitting opening 610 on the substrate 100.

[0071] In these optional embodiments, the raised structure 600 forms a light-transmitting opening 610 by enclosing the light-emitting unit 210, and the projection of the light-emitting unit 210 is completely located within the opening, ensuring that the raised structure 600 does not overlap with the light-emitting unit 210 in space. This design completely avoids the occlusion or light scattering problems that may be caused to the light-emitting unit 210 by the traditional discrete raised structure 600, thereby ensuring that the light from the light-emitting unit 210 can be completely transmitted through the opening, improving display brightness and color gamut performance. The size and shape of the light-transmitting opening 610 can be dynamically adjusted according to the arrangement of the light-emitting units 210 (such as RGB sub-pixels), for example, using a honeycomb or rectangular opening to adapt to different pixel designs. This feature enhances process compatibility; even with manufacturing errors (such as photolithography misalignment), the redundant design of the light-transmitting opening 610 can still ensure the alignment accuracy between the light-emitting unit 210 and the light-transmitting opening 610, reducing yield loss. The boundary of the light-transmitting opening 610 can act as a physical barrier, limiting the diffusion of IJP material outside the opening and reducing unintended light reflection or scattering caused by material overflow.

[0072] In some alternative embodiments, there are multiple raised structures 600, which are spaced apart. For example, 2 to 10 raised structures 600 are provided.

[0073] In these optional embodiments, multiple raised structures 600 are discretely distributed at the edges of the display area AA (e.g., at the boundary between the display area AA and the non-display area NA), providing local support to finely control the leveling process of the IJP (inkjet printing) material. Compared to continuous structures, the spaced raised structures 600 can specifically mitigate steep slope changes in different areas; for example, increasing the density of raised structures 600 in areas with steep slopes and reducing their number in areas with gentle slopes. This flexibility can significantly reduce the thickness variation of the filter layer 500 material, thereby suppressing the brightening phenomenon at the edges of the display area AA at low gray levels (e.g., 16 gray levels or 2nit 32 gray levels). Continuous support structures may experience localized stress concentration due to thermal expansion or mechanical bending, leading to cracking of the encapsulation layer or filter layer 500. The spaced-apart raised structures 600 disperse stress points, alleviating stress accumulation in a single area. Simultaneously, the elastic deformation capability of the raised structures 600 (e.g., comprising organic materials such as polyimide) absorbs some mechanical stress, thereby improving the long-term reliability of the display panel 10. During the IJP coating process, the spaced-apart raised structures 600 act as "flow dams," guiding ink flow along a predetermined path. By controlling the arrangement of the raised structures 600, ink overflow or accumulation in edge areas can be avoided, reducing defects such as black spots and bubbles, while ensuring uniform coverage of the filter layer 500 material at the edges of the display area AA.

[0074] Optional, a 600mm raised structure is available.

[0075] Please see Figure 2 and Figure 4 , Figure 4 This is a top view of a display panel provided in yet another embodiment.

[0076] like Figure 2 and Figure 4 As shown, in some optional embodiments, a plurality of raised structures 600 are spaced apart along the direction from the display area AA to the non-display area NA.

[0077] In these optional embodiments, the raised structures 600 are spaced apart along the direction from the display area AA to the non-display area NA, forming a stepped or gradient support. This arrangement avoids abrupt local slope changes caused by a single raised structure 600 by gradually adjusting the leveling slope of the first thinning portion 420. For example: away from the non-display area NA: a higher density of raised structures 600 is used to reduce the initial leveling slope and prevent the filter layer 500 material from thinning rapidly at this point; extending towards the non-display area NA: the density of raised structures 600 is gradually reduced, allowing the IJP material to transition smoothly to the non-display area NA, ensuring that the thickness of the filter layer 500 tends to be uniform at the edge of the display area AA. This gradient design significantly reduces the problem of bright edges of the display area AA caused by differences in the thickness of the filter layer 500 at low grayscale levels. The raised structures 600 spaced apart along the direction from the display area AA to the non-display area NA distribute the support force to multiple discrete points, avoiding local stress concentrations that may be caused by continuous structures.

[0078] In some alternative embodiments, a single raised structure 600 is arranged in a closed loop. Multiple raised structures 600 are spaced apart, meaning multiple ring-shaped raised structures 600 are spaced apart along the direction from the display area AA to the non-display area NA.

[0079] In these optional embodiments, the closed ring structure forms a continuous, closed support boundary at the edge of the display area AA, enabling full-area control of the leveling process of the IJP (inkjet printing) material. Compared to the discrete padding structure 600, the ring structure completely eliminates support gaps, ensuring a smooth transition of the IJP material's slope at the edge of the display area AA, avoiding abrupt changes in the thickness of the filter layer 500 due to local support deficiencies, thereby completely suppressing edge brightening at low grayscale levels. The closed ring structure forms a physical barrier at the boundary between the display area AA and the non-display area NA, limiting the diffusion range of the IJP material and preventing ink overflow into the non-display area NA. The closed ring structure complements the first thinning portion 420 of the second organic encapsulation layer 400: the ring padding structure 600 fully elevates the sunken area of ​​the first thinning portion 420, significantly reducing its slope; the thinning design of the second organic encapsulation layer 400 reduces edge reflection, and the two work together to improve encapsulation effect and display performance.

[0080] Please see Figure 5 , Figure 5This is a partial cross-sectional view of a display panel provided in another embodiment.

[0081] like Figure 5 As shown, in some optional embodiments, the thickness of the plurality of raised structures 600 tends to increase along the direction from the display area AA to the non-display area NA.

[0082] In these alternative embodiments, the thickness of the raised structure 600 tends to increase along the direction from the display area AA to the non-display area NA, forming a gradient support. For example: away from the non-display area NA: the thinner raised structure 600 provides basic support, reduces the initial leveling slope of the IJP material, and prevents the filter layer 500 from thinning due to the steep slope in this area; extending towards the non-display area NA: the gradually thickening raised structure 600 further lifts the IJP material, making the slope gentler, ensuring a uniform transition of the filter layer 500 thickness from the display area AA to the non-display area NA, and significantly reducing edge shine problems. The first thinned portion 420 of the second organic encapsulation layer 400 sinks from the display area AA to the non-display area NA. The gradually increasing thickness of the raised structure 600 can accurately compensate for the slope change in the sinking area, complementing the morphology of the first thinned portion 420, and avoiding local thinning of the filter layer 500 material due to sinking.

[0083] Optionally, multiple raised structures 600 may have the same thickness. A uniform thickness of raised structures 600 can be achieved through standardized mask design and process parameters, reducing manufacturing complexity. For example, it eliminates the need for frequent adjustments to exposure or etching parameters during photolithography, reducing process debugging time; it ensures consistent support across different batches of panels, improving mass production yield. If the slope change of the first thinning section 420 from the display area AA to the non-display area NA is small, a uniform thickness of raised structures 600 can provide uniform support. By adjusting the density (rather than the height) of the raised structures 600, the IJP leveling slope can be controlled, meeting the uniformity requirements of conventional display panels 10.

[0084] In some alternative embodiments, the thickness of the plurality of raised structures 600 gradually increases along the direction from the display area AA to the non-display area NA.

[0085] In these optional embodiments, the thickness of the raised structure 600 gradually increases along the direction from the display area AA to the non-display area NA, forming a gradient support. For example: away from the non-display area NA: the thinner raised structure 600 provides basic support, reduces the initial leveling slope of the IJP material, and prevents the filter layer 500 from thinning due to the steep slope in this area; extending towards the non-display area NA: the gradually thickening raised structure 600 further lifts the IJP material, making the slope gentler, ensuring a uniform transition of the filter layer 500 thickness from the display area AA to the non-display area NA, and significantly reducing edge shine problems. The first thinned portion 420 of the second organic encapsulation layer 400 sinks from the display area AA to the non-display area NA. The gradually thickening raised structure 600 can accurately compensate for the slope change in the sinking area, complementing the morphology of the first thinned portion 420, and avoiding local thinning of the filter layer 500 material due to sinking.

[0086] Optionally, along the direction from the display area AA to the non-display area NA, the spacing between two adjacent raised structures 600 is equal, or the spacing between two adjacent raised structures 600 gradually increases.

[0087] In some alternative embodiments, the display panel 10 further includes: a dam 700 located on one side of the substrate 100 and in the non-display area NA, and a second organic encapsulation layer 400 located on the side of the dam 700 facing the display area AA.

[0088] In these alternative embodiments, the dam 700 is located in the non-display area NA, acting as a physical barrier to prevent the diffusion of the second organic encapsulation layer 400 material towards the side of the dam 700 away from the display area AA. By limiting its flow range, it restricts the overflow of IJP (inkjet printing) material during the coating process, reducing defects such as black spots and bubbles. The second organic encapsulation layer 400 covers the side of the dam 700 facing the display area AA, forming an "anchoring effect" and reducing the risk of warping or peeling of the second organic encapsulation layer 400; the material of the dam 700 (such as a high-hardness photoresist material) can disperse thermal and mechanical stress, preventing crack propagation caused by temperature changes or panel bending.

[0089] Optionally, the dam 700 can be formed simultaneously with the raised structure 600 through a single photolithography process, reducing the number of mask replacements.

[0090] Optionally, the material of the dam 700 may include organic materials. Optionally, the display panel 10 may also include a planarization layer located between the substrate 100 and the pixel definition layer 800, and the dam 700 and the planarization layer may be fabricated simultaneously.

[0091] Please see Figure 6 , Figure 6 This is a partial cross-sectional view of a display panel provided in yet another embodiment.

[0092] like Figure 6 As shown, in some optional embodiments, the elevation structure 600 includes a first elevation portion 601 and a second elevation portion 602, the first elevation portion 601 being located in the display area AA, and the second elevation portion 602 being located in the non-display area NA and on the side of the dam 700 facing the display area AA.

[0093] In these optional embodiments, the first raised portion 601 is located inside the display area AA, directly controlling the leveling slope of the IJP (inkjet printing) material locally. By moderately raising it, the steep slope change at the edge of the display area AA is mitigated, ensuring the uniformity of the thickness of the filter layer 500 material around the light-emitting unit 210 and avoiding edge brightening problems caused by local thinning. The second raised portion 602 is located in the non-display area NA and adjacent to the side of the dam 700 facing the display area AA, mainly compensating for the leveling slope at the junction of the display area AA and the non-display area NA. The second raised portion 602 works in conjunction with the dam 700 to prevent the IJP material from overflowing into the non-display area NA, while further improving the thickness distribution of the filter layer 500 material at the junction of the display area AA and the non-display area NA through gradient support.

[0094] Please see Figure 6 and Figure 7 , Figure 7 This is a partial cross-sectional view of a display panel provided in another embodiment.

[0095] like Figure 6 and Figure 7 As shown, in some optional embodiments, the non-display area NA also includes a virtual pixel area NA1 located between the display areas AA of the dam 700, at least a portion of the second padding portion 602 is located within the virtual pixel area NA1, and the light-emitting layer 200 also includes virtual units (not shown in the figure) located within the virtual pixel area NA1.

[0096] In these optional embodiments, the virtual pixel area NA1 is located between the display area AA and the non-display area NA, and is typically used to assist manufacturing (such as photolithography alignment, process compensation) or simulate the photoelectric characteristics of real pixels. A second shim 602 is disposed in this area to precisely control the leveling slope of the IJP (inkjet printing) material, ensuring a continuous transition in the thickness of the filter layer 500 between the virtual pixel area NA1 and the display area AA, avoiding edge brightening issues caused by structural abrupt changes. Virtual units within the virtual pixel area NA1 are used to simulate the electrical or optical behavior of the real light-emitting unit 210 (such as test signal transmission or brightness calibration). The second shim 602 provides stable support for the virtual units, preventing structural deformation due to encapsulation layer sagging or steep IJP slopes, ensuring test accuracy and process reliability. The virtual units have the same structure as the light-emitting units 210 in the display area AA. The anode of the light-emitting unit 210 in the display area AA is connected to the driving circuit to drive the light emission of the light-emitting unit 210, while the anode of the virtual units in the virtual pixel area NA1 is suspended (not connected to the driving circuit).

[0097] Optionally, the virtual unit is located within the pixel opening 820 in the non-display area NA.

[0098] In some optional embodiments, the non-display area NA also includes a reset signal area NA2 located between the display areas AA of the dam 700, at least a portion of the second shim 602 is located within the reset signal area NA2, and a reset signal line (not shown in the figure) is provided within the reset signal area NA2.

[0099] In these optional embodiments, the second raised portion 602 compensates for the leveling slope of the IJP material within the reset signal region NA2, preventing the filter layer 500 material from thinning in the reset signal region NA2 due to the sinking of the encapsulation layer. By controlling this slope, the thickness of the filter layer 500 is ensured to transition smoothly from the display area AA to the non-display area NA, thereby suppressing edge brightening issues at low grayscale levels. The second raised portion 602 forms discrete support points within the reset signal region NA2, dispersing thermal and mechanical bending stresses between the encapsulation layer and the substrate 100, reducing fatigue damage to the reset signal line caused by stress concentration, and improving the long-term stability of signal transmission.

[0100] Optionally, the display panel 10 also includes a metal layer located between the substrate 100 and the light-emitting layer 200, and a reset signal line (vref) located within the metal layer. The reset signal line is used to provide a reset signal to the driving circuit.

[0101] In some optional embodiments, the non-display area NA also includes a gate driving area NA3 located between the display areas AA of the dam 700, at least a portion of the second shim 602 is located within the gate driving area NA3, and a shift register (not shown in the figure) is provided within the gate driving area NA3.

[0102] In these optional embodiments, the second raised portion 602 is located within the gate driving region NA3, adjusting the leveling slope of the IJP (inkjet printing) material through local support, avoiding steep slopes caused by the sinking of the encapsulation layer (such as the second organic encapsulation layer 400) in this area. This design ensures the uniformity of the thickness of the filter layer 500 material in the gate driving region NA3, reducing edge brightening problems caused by thickness differences. As a core component of the gate driving circuit, the shift register is sensitive to mechanical and thermal stress. The second raised portion 602 disperses the stress between the encapsulation layer and the substrate 100, preventing signal distortion or open circuits caused by interlayer peeling or deformation of the shift register, thus improving the long-term stability of the circuit. The chain structure composed of multiple shift registers is the integrated gate driver in panel (GIP) circuit, which sequentially activates the gate line of each row of pixels by transmitting scan signals step by step, achieving line-by-line scanning.

[0103] Optionally, the second raised portion 602 is located within at least one of the virtual pixel area NA1, the reset signal area NA2, and the gate driving area NA3. For example, the second raised portion 602 is located within the virtual pixel area NA1, the reset signal area NA2, or the gate driving area NA3; or, the second raised portion 602 is located within both of the virtual pixel area NA1, the reset signal area NA2, and the gate driving area NA3; or, the second raised portion 602 is located within the virtual pixel area NA1, the reset signal area NA2, and the gate driving area NA3.

[0104] Optionally, the reset signal area NA2 is located between the virtual pixel area NA1 and the gate drive area NA3, or the reset signal area NA2 and the virtual pixel area NA1 overlap.

[0105] Please see Figure 6 and Figure 8 , Figure 8 This is a partial cross-sectional view of a display panel provided in another embodiment.

[0106] like Figure 6 and Figure 8 As shown, in some optional embodiments, the thickness of the first raised portion 601 is greater than or equal to the thickness of the second raised portion 602. For example, the thickness of the first raised portion 601 is greater than the thickness of the second raised portion 602.

[0107] In these optional embodiments, the first raised portion 601 is located at the edge of the display area AA and has a relatively large thickness, which can significantly reduce the leveling slope of the IJP (inkjet printing) material and ensure the uniformity of the thickness of the filter layer 500 material in this critical area. For example, the thicker first raised portion 601 can compensate for the thinning of the filter layer 500 caused by the steep slope of the IJP, suppressing the edge brightening problem at low gray levels from the root. The second raised portion 602 is located in the non-display area NA (such as near the dam 700, the virtual pixel area NA1, the reset signal area NA2, or the gate drive area NA3) and has a smaller thickness. It is mainly used to cooperate with the first raised portion 601 to smooth the transition slope and avoid material accumulation or increased process complexity in the non-display area NA due to excessive support. The thickness difference between the first raised portion 601 and the second raised portion 602 forms a gradient support structure, dispersing the thermal and mechanical stress between the encapsulation layer and the substrate 100. For example, the edge stress of the display area AA is relatively high. The main stress is absorbed by the thicker first raised portion 601, while the second raised portion 602 provides auxiliary buffering to reduce the risk of interlayer peeling or cracking. The second raised portion 602 is thinner to avoid excessive accumulation of organic material in non-functional areas (such as the gate drive area NA3 and the reset signal area NA2), thus preventing interference with circuit traces or signal transmission.

[0108] In some alternative embodiments, the ratio of the thickness of the raised structure 600 to the maximum thickness of the second organic encapsulation layer 400 is 0.01 to 0.6. For example, the ratio of the thickness of the raised structure 600 to the maximum thickness of the second organic encapsulation layer 400 is 0.01, 0.1, 0.3, 0.6, etc. The maximum thickness of the second organic encapsulation layer 400 can be considered as the thickness of the first main body portion 410.

[0109] In these optional embodiments, the ratio of the thickness of the raised structure 600 to the maximum thickness of the second organic encapsulation layer 400 is 0.01 to 0.6. This ensures that the raised structure 600 provides effective support to improve the leveling slope of the IJP (inkjet printing) material while avoiding excessive elevation that could lead to material buildup or increased process complexity. A ratio of 0.01 or greater mitigates the problem of insufficient support for the second organic encapsulation layer 400 due to a small ratio, resulting in excessive sinking of the first thinned portion 420 due to gravity or surface tension and poor uniformity of the filter layer 500 thickness. A ratio of 0.6 or less mitigates the problem of excessive elevation leading to material buildup, increased process complexity, and localized rigidity abrupt changes due to a large ratio. The thickness ratio of the raised structure 600 directly affects the transmittance uniformity of the CF layer. When the ratio is between 0.01 and 0.6, it ensures that the thickness of the filter layer 500 material at the edge of the display area AA is consistent with that in the central area, reducing abrupt changes in light refractive index caused by thickness differences, thereby improving edge brightening at low gray levels. The projection of the raised structure 600 strictly avoids the light-emitting unit 210, and combined with a reasonable ratio, avoids the raised structure 600 from negatively affecting luminous efficiency or color gamut performance.

[0110] Optionally, the cross-section of the raised structure 600 is a regular trapezoid.

[0111] Optionally, the display panel 10 further includes a first electrode 830 located between the substrate 100 and the light-emitting unit 210. At least a portion of the first electrode 830 is exposed through a pixel opening 820. The first electrode 830 contacts the light-emitting unit 210 to serve as an electrode of the light-emitting unit 210, driving the light-emitting unit 210 to emit light. The first electrode 830 is also located in the non-display area NA, exposed through the pixel opening 820 within the non-display area NA and in contact with the virtual unit. However, the first electrode 830 located in the non-display area NA is not connected to the driving circuit and is suspended.

[0112] In some optional embodiments, the display panel 10 further includes a second electrode layer 840 located between the light-emitting layer 200 and the first inorganic encapsulation layer 300.

[0113] In these alternative embodiments, one of the first electrode 830 and the second electrode layer 840 serves as the anode of the light-emitting unit 210, and the other serves as the cathode of the light-emitting unit 210. This application embodiment illustrates this by using the second electrode layer 840 as the cathode of the light-emitting unit 210 and the first electrode 830 as the anode of the light-emitting unit 210.

[0114] Optionally, the light-emitting layer 200 includes at least an electron injection layer (EIL), an electron transport layer (ETL), a light-emitting material layer, a hole injection layer (HIL), and a hole transport layer (HTL).

[0115] The structural design in this embodiment can be applied to other display panels 10. The specific choice can be made according to the actual situation, and this application does not impose any specific restrictions on it.

[0116] A second aspect of the present invention also provides a display device including the display panel 10 of any of the first aspect embodiments described above. Since the display device provided by the second aspect of the present invention includes the display panel 10 of any of the first aspect embodiments described above, the display device provided by the second aspect of the present invention has the beneficial effects of the display panel 10 of any of the first aspect embodiments described above, which will not be elaborated further here.

[0117] The display devices in the embodiments of the present invention include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0118] like Figures 1 to 8 As shown, an embodiment of the third aspect of the present invention also provides a method for manufacturing a display panel 10, the display panel 10 including a display area AA and a non-display area NA, the method comprising:

[0119] A light-emitting layer 200 is prepared on a substrate 100. The light-emitting layer 200 includes a plurality of light-emitting units 210 spaced apart and located in the display area AA.

[0120] A first inorganic encapsulation layer 300 is prepared on the side of the light-emitting layer 200 that is away from the substrate 100;

[0121] A raised structure 600 is prepared on the side of the first inorganic encapsulation layer 300 that is away from the substrate 100;

[0122] A second organic encapsulation layer 400 and a filter layer 500 are sequentially prepared on the side of the first inorganic encapsulation layer 300 away from the substrate 100. The second organic encapsulation layer 400 includes a first main body portion 410 and a first thinning portion 420. The first thinning portion 420 is disposed around the first main body portion 410, and the thickness of the first thinning portion 420 is less than the thickness of the first main body portion 410. The filter layer 500 includes a plurality of filter portions 510, which are disposed corresponding to the light-emitting unit 210. The padding structure 600 is located between the first inorganic encapsulation layer 300 and the first thinning portion 420. At least part of the padding structure 600 is located within the display area AA. The orthogonal projection of the padding structure 600 on the substrate 100 is located outside the orthogonal projection of the light-emitting unit 210 on the substrate 100.

[0123] According to the fabrication method of the display panel 10 in this application embodiment, a light-emitting layer 200 is first fabricated on a substrate 100 to realize the light-emitting display of the display area AA. Then, a first inorganic encapsulation layer 300 and a padding structure 600 are sequentially fabricated on the side of the light-emitting layer 200 away from the substrate 100. Finally, a second organic encapsulation layer 400 and a filter layer 500 are sequentially fabricated on the side of the first inorganic encapsulation layer 300 away from the substrate 100. The first inorganic encapsulation layer 300 and the second organic encapsulation layer 400 encapsulate the light-emitting layer 200. The filter section 510 and the light-emitting unit 210 are correspondingly provided. The filter section 510 accurately filters non-target wavelength light, reduces color interference, and ensures the purity of the color output of the light-emitting unit 210, thereby improving color saturation and contrast. The second organic encapsulation layer 400 includes a first main body portion 410 and a first thinning portion 420. The first thinning portion 420 is disposed around the first main body portion 410, and the thickness of the first thinning portion 420 is less than the thickness of the first main body portion 410, that is, the first thinning portion 420 is sunken relative to the first main body portion 410 and has a certain slope. During the fabrication of the filter layer 500, the filter layer 500 is thinned at the position of the first thinning portion 420. A padding structure 600 is provided between the first thinning portion 420 and the first inorganic encapsulation layer 300. The padding structure 600 raises the portion of the first thinning portion 420 located in the display area AA, improves the leveling slope of the portion of the first thinning portion 420 located in the display area AA, reduces the thickness difference between the portion of the filter layer 500 on the first main body portion 410 and the portion on the first thinning portion 420, and improves the uniformity of the material thickness of the filter layer 500. This improves the problem of the filter layer 500 becoming thinner at the position of the first thinning portion 420 due to the large slope of the first thinning portion 420, resulting in increased transmittance of the thinned filter layer 500 and reduced edge light emission of the display area AA of the display panel 10 when the display panel 10 is lit, thereby improving the performance of the display panel 10.

[0124] The embodiments described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, The display panel has adjacent display areas and non-display areas, and the display panel includes: substrate; A light-emitting layer is located on one side of the substrate, and the light-emitting layer includes a plurality of light-emitting units spaced apart and located in the display area; The first inorganic encapsulation layer is located on the side of the light-emitting layer that is away from the substrate; The second organic encapsulation layer is located on the side of the first inorganic encapsulation layer away from the substrate. The second organic encapsulation layer includes a first main body portion and a first thinning portion. The first thinning portion is disposed around the first main body portion, and the thickness of the first thinning portion is less than the thickness of the first main body portion. A filter layer is located on the side of the second organic encapsulation layer opposite to the substrate. The filter layer includes a plurality of filter portions, which are disposed corresponding to the light-emitting unit. A raised structure is located between the first inorganic encapsulation layer and the first thinning portion, with at least a portion of the raised structure located within the display area, and the orthogonal projection of the raised structure onto the substrate being located outside the orthogonal projection of the light-emitting unit onto the substrate.

2. The display panel according to claim 1, characterized in that, The raised structure is grid-like; Preferably, the raised structure encloses a light-transmitting opening, and the projection of the light-emitting unit onto the substrate is located within the projection of the light-transmitting opening onto the substrate.

3. The display panel according to claim 1, characterized in that, There are multiple raised structures, and the multiple raised structures are arranged at intervals; Preferably, the plurality of the raised structures are spaced apart along the direction from the display area to the non-display area; Preferably, each of the raised structures is enclosed in a closed loop.

4. The display panel according to claim 3, characterized in that, Along the direction from the display area to the non-display area, the thickness of the plurality of raised structures tends to increase, or the thickness of the plurality of raised structures is the same; Preferably, the thickness of the plurality of raised structures gradually increases along the direction from the display area to the non-display area.

5. The display panel according to claim 1, characterized in that, The display panel also includes: A dam is located on one side of the substrate and in the non-display area, and the second organic encapsulation layer is located on the side of the dam facing the display area.

6. The display panel according to claim 5, characterized in that, The elevation structure includes a first elevation part and a second elevation part. The first elevation part is located in the display area, and the second elevation part is located in the non-display area and on the side of the dam facing the display area.

7. The display panel according to claim 6, characterized in that, The non-display area also includes a virtual pixel area located between the display areas of the dam, at least a portion of the second raised portion is located within the virtual pixel area, and the light-emitting layer also includes virtual units located within the virtual pixel area; Preferably, the non-display area further includes a reset signal area located between the display areas of the dam, at least a portion of the second raised portion is located within the reset signal area, and a reset signal line is provided within the reset signal area; Preferably, the non-display area further includes a gate driving region located between the display areas of the dam, at least a portion of the second raised portion is located within the gate driving region, and a shift register is provided within the gate driving region.

8. The display panel according to claim 6, characterized in that, The thickness of the first raised portion is greater than or equal to the thickness of the second raised portion; Preferably, the thickness of the first raised portion is greater than the thickness of the second raised portion.

9. The display panel according to claim 1, characterized in that, The ratio of the thickness of the raised structure to the maximum thickness of the second organic encapsulation layer is 0.01 to 0.

6.

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

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