Display panel and manufacturing method therefor, and display apparatus

Abstract

Embodiments of the present invention provide a display panel and a manufacturing method therefor, and a display apparatus. The display panel comprises a substrate, and light-emitting devices and isolation columns which are located on the same side of the substrate. The orthographic projection of each isolation column on the substrate is located between the orthographic projections of adjacent light-emitting devices on the substrate. The display panel has a first cross-section, and the first cross-section is perpendicular to a plane where the substrate is located. In the first cross-section, the isolation column comprises a bottom edge, inclined edges, and arc-shaped edges; the bottom edge is the edge on the side of the isolation column close to the substrate, and the arc-shaped edges are connected to the bottom edge and the inclined edges; an angle formed between each inclined edge and the plane where the substrate is located and oriented toward the outside the isolation column is an acute angle; and the arc-shaped edges are recessed toward the inside of the isolation column. The present invention can prevent the formation of encapsulation voids and cracks at bottom corners of the isolation columns, thereby improving the encapsulation reliability of the display panel.

Description

A display panel, its manufacturing method, and a display device thereof.

[0001] This invention claims priority to Chinese Patent Application No. 202411722707.3, filed with the State Intellectual Property Office of China on November 27, 2024, entitled “A display panel and its manufacturing method and display device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of display technology, and in particular to a display panel, its manufacturing method, and a display device. Background Technology

[0003] Organic self-emissive display panels (OLEDs) possess self-emissive properties, eliminating the need for a backlight and resulting in a thinner and lighter design compared to LCD panels. Furthermore, OLEDs offer advantages such as high brightness, low power consumption, fast response time, high resolution, good flexibility, and high luminous efficiency, meeting evolving consumer demands for display technology. In OLEDs, the organic functional layers of each light-emitting device are fabricated using a vapor deposition process. To minimize leakage between the devices, isolation pillars are typically used to partially isolate the organic functional layers. However, when an inorganic encapsulation layer is fabricated on top of these isolation pillars, localized cracking of the encapsulation layer can lead to encapsulation failure. Summary of the Invention

[0004] This invention provides a display panel, a method for manufacturing the same, and a display device to solve the technical problem of improving the reliability of display panel packaging.

[0005] In a first aspect, embodiments of the present invention provide a display panel, comprising: a substrate, light-emitting devices, and isolation pillars located on the same side of the substrate; the orthographic projection of the isolation pillars onto the substrate is located between the orthographic projections of adjacent light-emitting devices onto the substrate;

[0006] The display panel has a first cross section, which is perpendicular to the plane of the substrate.

[0007] In the first cross section, the isolation pillar includes a bottom edge, a hypotenuse, and an arc-shaped edge. The bottom edge is the side of the isolation pillar closest to the substrate. The arc-shaped edge connects the bottom edge and the hypotenuse. The angle formed between the hypotenuse and the plane containing the substrate, facing outwards from the isolation pillar, is an acute angle. The arc-shaped edge is recessed into the isolation pillar.

[0008] Secondly, based on the same inventive concept, embodiments of the present invention provide a display device, including a display panel provided in any embodiment of the present invention.

[0009] Thirdly, based on the same inventive concept, embodiments of the present invention provide a method for manufacturing a display panel, the method comprising: manufacturing a light-emitting device and an isolation pillar on one side of a substrate, wherein the orthographic projection of the isolation pillar onto the substrate is located between the orthographic projections of adjacent light-emitting devices onto the substrate; the method for manufacturing the isolation pillar comprises:

[0010] The photoresist material is coated and then exposed and developed to form the initial shape of the isolation column;

[0011] The initial shape of the isolation column was obtained by IUV irradiation.

[0012] The isolation pillar is obtained by curing the initial shape of the isolation pillar and the isolation pillar has an arc-shaped edge; wherein, the display panel has a first cross section, the first cross section is perpendicular to the plane of the substrate; in the first cross section, the isolation pillar includes a bottom edge, a beveled edge and an arc-shaped edge, the bottom edge is the side of the isolation pillar closest to the substrate, the arc-shaped edge connects the bottom edge and the beveled edge, the angle formed between the beveled edge and the plane of the substrate facing outward of the isolation pillar is an acute angle, and the arc-shaped edge is recessed into the isolation pillar.

[0013] The display panel, its manufacturing method, and the display device provided in this invention have the following beneficial effects: In the display panel provided in this invention, inverted trapezoidal isolation pillars are provided between adjacent light-emitting devices. These isolation pillars can isolate the organic functional layers in the light-emitting devices, reducing leakage current between adjacent light-emitting devices. The isolation pillars have arc-shaped edges connecting the bottom edge and the bevel, making the bottom corner of the isolation pillar near the substrate an arc-shaped bottom corner. When fabricating the inorganic encapsulation layer, the inorganic material can be well deposited and smoothly transitioned at the arc-shaped bottom corner of the isolation pillar, avoiding the formation of encapsulation voids and cracks at the bottom corner of the isolation pillar, thus improving the encapsulation reliability of the display panel. Attached Figure Description

[0014] 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, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 is a schematic cross-sectional view of a display panel in the related art;

[0016] Figure 2 is a schematic diagram of a display panel provided in an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of a cross section at the position of tangent AA′ in Figure 2;

[0018] Figure 4 is a schematic diagram of a stacked light-emitting device according to an embodiment of the present invention;

[0019] Figure 5 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0020] Figure 6 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0021] Figure 7 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0022] Figure 8 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0023] Figure 9 is a partial schematic diagram of another display panel provided in an embodiment of the present invention;

[0024] Figure 10 is a simplified schematic diagram of a cross section at the position of tangent BB′ in Figure 9;

[0025] Figure 11 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0026] Figure 12 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0027] Figure 13 is a partial schematic diagram of another display panel provided in an embodiment of the present invention;

[0028] Figure 14 is a partial schematic diagram of another display panel provided in an embodiment of the present invention;

[0029] Figure 15 is a partial schematic diagram of another display panel provided in an embodiment of the present invention;

[0030] Figure 16 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention;

[0031] Figure 17 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention;

[0032] Figure 18 is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Various modifications and variations can be made to this invention without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, this invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this invention can be combined with each other without contradiction.

[0035] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0036] Figure 1 is a schematic cross-sectional view of a display panel in the related art. As shown in Figure 1, the display panel includes an isolation pillar 001, an organic functional layer 002 separated by the isolation pillar 001, and an inorganic encapsulation layer 003 covering the organic functional layer 002. The isolation pillar 001 is in the shape of an inverted trapezoid. Because the bottom corner of the inverted trapezoid is relatively sharp, the inorganic encapsulation layer 003 cannot be properly recessed at the bottom corner, easily forming voids and gaps, as shown by the dotted circle in Figure 1. At this gap location, the inorganic encapsulation layer 003 is prone to breakage along the gap direction and extend to the void location, resulting in poor encapsulation of the inorganic encapsulation layer 003 and affecting the encapsulation reliability of the display panel.

[0037] To address the problems existing in related technologies, embodiments of the present invention provide a display panel that improves the morphology at the bottom corner of the isolation pillar to improve the morphology of the inorganic encapsulation layer deposited at the bottom corner and reduce the risk of cracking in the inorganic encapsulation layer. Furthermore, in some embodiments, the morphology at the top corner of the isolation pillar is improved so that a relatively thick inorganic encapsulation layer can be deposited on the sidewall of the isolation pillar, further improving the encapsulation reliability of the inorganic encapsulation layer.

[0038] Figure 2 is a schematic diagram of a display panel provided in an embodiment of the present invention, and Figure 3 is a cross-sectional schematic diagram at the position of tangent AA′ in Figure 2. Figure 2 illustrates the arrangement of light-emitting devices in a partial position of the display panel. As shown in Figure 2, the light-emitting devices 10 include a first light-emitting device 11, a second light-emitting device 12, and a third light-emitting device 13, each with a different color. The arrangement of the light-emitting devices 10 in Figure 2 is only schematic and is not intended to limit the present invention. As can be seen from Figure 2, an isolation pillar 20 is provided between adjacent light-emitting devices 10, that is, the orthogonal projection of the isolation pillar 20 on the substrate 00 is located between the orthogonal projections of adjacent light-emitting devices 10 on the substrate 00.

[0039] Figure 3 illustrates the first cross-section M1 of the display panel, which is perpendicular to the plane containing the substrate 00. Referring to Figure 3, the light-emitting device 10 and the isolation pillar 20 are located on the same side of the substrate 00. In the first cross-section M1, the isolation pillar 20 includes a base 21, a hypotenuse 22, and an arc-shaped edge 23. The base 21 is the side of the isolation pillar 20 closest to the substrate 00, and the arc-shaped edge 23 connects the base 21 and the hypotenuse 22. It can be seen that the angle formed between the hypotenuse 22 and the plane containing the substrate 00, pointing towards the outside of the isolation pillar 20, is acute, and the arc-shaped edge 23 is concave inwards towards the isolation pillar 20. In the first cross-section M1, the isolation pillar 20 is approximately inverted trapezoidal in shape. The arc-shaped edge 23 can be a partial arc of an approximate circle or an approximate ellipse.

[0040] Figure 3 illustrates a driving layer 01, within which a pixel circuit is disposed. The pixel circuit drives the light-emitting device 10 to emit light. A pixel definition layer 02 is disposed above the driving layer 01, and the pixel definition layer 02 includes multiple openings 021, within which the light-emitting device 10 is located. The light-emitting device 10 includes a first electrode 101, a second electrode 102, and an organic functional layer 103. The organic functional layer 103 is deposited within the openings 021 and extends to the outside of the openings 021. The display panel also includes an organic functional portion 104, which covers the isolation pillar 20 on the side away from the substrate 00. The organic functional portion 104 and the organic functional layer 103 are made of the same material, and at the location of the isolation pillar 20, the organic functional portion 104 and the organic functional layer 103 are separated from each other. In the manufacturing of the display panel, an organic material layer is created using a vapor deposition process. This organic material layer is separated by isolation pillars 20. The organic material deposited at the bottom of the opening 021 forms an organic functional layer 103, and the organic material covering the isolation pillars 20 forms an organic functional part 104. Using the isolation pillars 20 to separate the organic material layer reduces leakage current between adjacent light-emitting devices 10. An inorganic encapsulation layer 03 is provided on the side of the light-emitting device 10 and the isolation pillars 20 away from the substrate 00, covering the light-emitting device 10 and the isolation pillars 20 to form a single layer.

[0041] In the display panel provided in this embodiment of the invention, inverted trapezoidal isolation pillars 20 are provided between adjacent light-emitting devices 10. These isolation pillars 20 can isolate the organic functional layer 103 in the light-emitting devices 10, reducing leakage current between adjacent light-emitting devices 10. The isolation pillars 20 have arc-shaped edges 23, which connect the bottom edge 21 and the inclined edge 22, making the bottom corner of the isolation pillar 20 near the substrate 00 an arc-shaped bottom corner. When fabricating the inorganic encapsulation layer 03, the inorganic material can be well deposited and smoothly transitioned at the arc-shaped bottom corner of the isolation pillar 20, avoiding the formation of encapsulation voids and cracks at the bottom corner of the isolation pillar 20, thus improving the encapsulation reliability of the display panel.

[0042] Figure 3 only provides a simplified schematic of the light-emitting device 10. In some embodiments, the light-emitting device 10 includes a light-emitting layer located between the first electrode 101 and the second electrode 102. The organic functional layer 103 includes at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, and an electron injection layer. Optionally, the first electrode 101 is an anode and the second electrode 102 is a cathode.

[0043] In some embodiments, the light-emitting device 10 is a stacked device. Figure 4 is a schematic diagram of a stacked light-emitting device according to an embodiment of the present invention. As shown in Figure 4, the light-emitting device 10 includes a first electrode 101 and a second electrode 102, and at least two light-emitting layers 105 located between the first electrode 101 and the second electrode 102. A charge-generating layer 106 is disposed between adjacent light-emitting layers 105. The charge-generating layer 106 includes an n-type charge-generating layer N-CGL and a p-type charge-generating layer P-CGL. The light-emitting device 10 also includes a hole-blocking layer HBL, an electron transport layer ETL, a hole transport layer HTL, an electron injection layer EIL, and other film layers. Figure 4 is a schematic diagram of the light-emitting device 10 including two light-emitting layers 105. The embodiments of the present invention can be applied to display panels with stacked devices, which can improve the efficiency of the light-emitting device 10, reduce power consumption, and extend lifespan. The isolation pillar 20 structure provided in the embodiments of the present invention can also improve packaging reliability and further extend service life.

[0044] As shown in Figure 3, the display panel includes a pixel definition layer 02 located on one side of the substrate 00, and isolation pillars 20 located on the side of the pixel definition layer 02 away from the substrate 00. The curved edge 23 contacts the surface of the pixel definition layer 02 on the side away from the substrate 00. In this embodiment, the surface of the pixel definition layer 02 is the base surface of the isolation pillar 20, and the bottom edge 21 of the isolation pillar 20 contacts the surface of the pixel definition layer 02. This embodiment of the invention designs the shape of the isolation pillar 20 itself to form a curved bottom corner, thereby improving the deposition morphology of the inorganic encapsulation layer at the bottom corner of the isolation pillar 20 and enhancing the encapsulation reliability of the display panel.

[0045] In some embodiments, Figure 5 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. Figure 5 only shows the location of the isolation pillar 20 in the first cross-section M1. As shown in Figure 5, in the first cross-section M1, along the first direction a, the arc-shaped edge 23 does not extend beyond the end edge B of the isolation pillar 20 on the side away from the substrate 00, and the first direction a is parallel to the plane where the substrate 00 is located. In this embodiment, the length of the arc-shaped edge 23 in the first direction a is not too long. On the one hand, the width occupied by the isolation pillar 20 in the first direction a is not too large, ensuring that a complete isolation pillar 20 can be set between adjacent light-emitting devices 10; on the other hand, it can also ensure the isolation effect of the isolation pillar 20 and allow the inorganic encapsulation layer to be deposited well at the position of the arc-shaped edge 23.

[0046] As shown in Figure 5, along the first direction a, the distance between the arc-shaped edge 23 and the end edge B of the isolation pillar 20 on the side away from the substrate 00 is ΔW; where ΔW ≥ h / (3*tanθ); h is the height of the isolation pillar 20 along the direction e perpendicular to the plane of the substrate 00, and θ is the first angle formed between the hypotenuse 22 and the plane of the substrate 00 facing outwards from the isolation pillar 20. It can be understood that the height h of the isolation pillar 20 is its own height, that is, the distance between the upper and lower ends of the isolation pillar 20 along direction e. In this embodiment of the invention, ΔW is set to be related to h and θ, so that the length of ΔW is not too small, and the arc-shaped edge 23 also has an appropriate length in the first direction a. This ensures the isolation effect of the isolation pillar 20 and allows the inorganic encapsulation layer to be deposited well at the position of the arc-shaped edge 23, improving encapsulation reliability.

[0047] In some embodiments, as shown in FIG5, the angle formed between the inclined side 22 and the plane containing the substrate 00 toward the outside of the isolation pillar 20 is a first included angle θ, where 45°≤θ≤75°. This arrangement ensures the degree of inclination of the inclined side 22 relative to the plane containing the substrate 00, ensuring that the isolation pillar 20 has a good isolation effect on the vapor-deposited material and improving the lateral leakage between the light-emitting devices 10.

[0048] In some embodiments, Figure 6 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. Figure 6 only shows the location of the isolation pillar 20 in the first cross-section M1. As shown in Figure 6, the height of the arc-shaped edge 23 along the direction e perpendicular to the plane where the substrate 00 is located is H1. The height H1 of the arc-shaped edge 23 is understood as its own height, that is, the length of the arc-shaped edge 23 along the direction e. The width of the arc-shaped edge 23 along the first direction a is W1, and the first direction a is parallel to the plane where the substrate 00 is located; wherein, 0.4≤H1 / W1≤2.5. The embodiments of the present invention set the height H1 and the width W1 of the arc-shaped edge 23 to satisfy a certain proportional relationship. In some embodiments, H1 and W1 can also be equal. When H1 is greater than W1, or when H1 is less than W1, the values ​​of H1 and W1 will not differ too much, so that the transition between the curved edge 23 and the inclined edge 22, as well as between the curved edge 23 and its base surface, can be smooth. In this way, the inorganic encapsulation layer can be deposited well at the position of the curved edge 23, avoiding the problem of encapsulation voids and cracks at the bottom corner of the isolation pillar 20, and improving the encapsulation reliability of the display panel.

[0049] In some implementations, 0.2μm≤H1≤0.5μm and 0.2μm≤W1≤0.5μm. In display panels, limitations in manufacturing processes and panel thickness requirements significantly influence the height of the isolation pillar 20. In this embodiment, H1 and W1 are set to within a certain range to ensure a smooth transition between the curved edge 23 and the inclined edge 22, as well as between the curved edge 23 and its substrate surface, allowing for effective deposition of the inorganic encapsulation layer at the curved edge 23. Furthermore, the height of the curved edge 23 does not constitute a large proportion of the overall height of the isolation pillar 20, ensuring the isolation pillar 20 effectively isolates the vapor-deposited material.

[0050] In some embodiments, Figure 7 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. Figure 7 only shows the location of the isolation pillar 20 in the first cross-section M1. As shown in Figure 7, the corner of the isolation pillar 20 away from the substrate 00 in the first cross-section M1 is an arc-shaped corner 24, which can be a partial arc of an approximate circle or ellipse. This embodiment of the present invention not only sets the bottom corner of the isolation pillar 20 near the substrate 00 as an arc-shaped bottom corner, but also sets the corner away from the substrate 00 as an arc-shaped corner 24. The arc-shaped bottom corner allows the inorganic encapsulation layer to be deposited well at the bottom of the isolation pillar 20, avoiding the formation of encapsulation voids and cracks at the bottom corner of the isolation pillar 20. The arc-shaped corner 24 facilitates the film formation and extension of the inorganic encapsulation layer on the inclined edge 22. The combination of the arc-shaped bottom corner and the arc-shaped corner 24 on the isolation pillar 20 allows the inorganic encapsulation layer to form a complete layer, improving encapsulation reliability.

[0051] As shown in Figure 7, in the first cross-section M1: along the direction e perpendicular to the plane where the substrate 00 is located, the height of the arc-shaped corner 24 is H2; the height H2 of the arc-shaped corner 24 is its own height, that is, the length of the arc-shaped corner 24 along the direction e; along the first direction a, the width of the arc-shaped corner 24 is W2, and the first direction a is parallel to the plane where the substrate 00 is located; wherein, 0.5≤H2 / W2≤2. In this embodiment of the invention, the height H2 and width W2 of the arc-shaped corner 24 are set to satisfy a certain proportional relationship. In some embodiments, H2 and W2 can also be equal. When H2 is greater than W2, or when H2 is less than W2, the numerical difference between H2 and W2 will not be too large, so the arc-shaped corner 24 and the hypotenuse 22, as well as the arc-shaped corner 24 and the upper surface of the isolation pillar 20, can smoothly transition, which is beneficial for the inorganic encapsulation layer to form and extend on the hypotenuse 22, and can improve the reliability of the display panel encapsulation.

[0052] In some implementations, 0.5μm≤H2≤0.9μm and 0.5μm≤W2≤0.9μm are specified. Setting H2 and W2 within a certain range allows for a smooth transition between the curved corner 24 and the inclined side 22, as well as between the curved corner 24 and the upper surface of the isolation pillar 20, enabling the inorganic encapsulation layer to form and extend on the inclined side 22. Furthermore, the height of the curved corner 24 does not constitute a large proportion of the overall height of the isolation pillar 20, ensuring the isolation effect of the isolation pillar 20 on the vapor-deposited material.

[0053] In some embodiments, as shown in FIG7, in the first cross-section M1: along the direction e perpendicular to the plane containing the substrate 00, the height of the arc-shaped edge 23 is H1, and the height of the arc-shaped corner 24 is H2, where H2>H1. In this embodiment of the invention, setting the height of the arc-shaped corner 24 to be greater than the height of the arc-shaped edge 23 can reduce the difficulty of the process and make the process simpler and easier to implement.

[0054] In some embodiments, as shown in FIG7, in the first cross-section M1: along the first direction a, the width of the arc-shaped edge 23 is W1, the width of the arc-shaped corner 24 is W2, W2>W1, and the first direction a is parallel to the plane where the substrate 00 is located. In this embodiment of the invention, the width of the arc-shaped corner 24 on the first direction a is greater than the width of the arc-shaped edge 23, which can reduce the difficulty of the process and make the process simpler and easier to implement.

[0055] In some embodiments, along the plane e perpendicular to the substrate 00, the height of the arc-shaped edge 23 is H1, the height of the arc-shaped corner 24 is H2, and the height of the isolation pillar 20 is h; wherein, h - H1 - H2 ≥ h / 3. That is, the sum of the height H1 of the arc-shaped edge 23 and the height H2 of the arc-shaped corner 24 does not exceed two-thirds of the height of the isolation pillar 20. This arrangement ensures that the inclined side 22 has a certain length, and combined with the design of the first included angle θ, it ensures that the isolation pillar 20 has a good isolation effect on the vapor-deposited material, effectively improving the lateral leakage between the light-emitting devices 10.

[0056] In some embodiments, FIG8 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. As shown in FIG8, the display panel includes a pixel definition layer 02 located on one side of the substrate 00. The pixel definition layer 02 includes a plurality of openings 021. Referring to FIG3, the light-emitting device 10 is located within the openings 021. The isolation pillar 20 is located on the side of the pixel definition layer 02 away from the substrate 00. The pixel definition layer 02 includes a base portion 022 and a protrusion portion 023. The protrusion portion 023 protrudes from the base portion 022 toward the side away from the substrate 00. The base portion 022 and the openings 021 share a sidewall. In the first cross-section M1, the edge of the base portion 022 extends beyond the protrusion portion 023 along a first direction a. The first direction a is parallel to the plane where the substrate 00 is located, that is, the width of the base portion 022 in the first direction a is greater than the width of the protrusion portion 023 in the first direction a. Along the plane e perpendicular to the substrate 00, the isolation pillar 20 at least partially overlaps with the protrusion 023; the protrusion 023 includes a first top surface m1 and a first side surface m2 connected to each other; in the first cross-section M1, it can be seen that the angle formed by the first top surface m1 and the first side surface m2 towards the interior of the protrusion 023 is an obtuse angle. The isolation pillar 20 includes a first isolation pillar 20-1, which is in contact with the first top surface m1. That is, the bottom edge 21 of the first isolation pillar 20-1 is in contact with the first top surface m1. In this embodiment of the invention, a first isolation pillar 20-1 is provided, which is disposed on the protrusion 023 of the pixel definition layer 02. This is equivalent to placing the first isolation pillar 20-1 on the ramp position of the pixel definition layer 02, so that a large included angle is formed between the inclined edge 22 of the isolation pillar 20 and the first side surface m2 of the protrusion 023, which is more conducive to the formation of the inorganic encapsulation layer at the bottom of the isolation pillar 20, further improving the encapsulation reliability. In addition, the first isolation post 20-1 is set on the protrusion 023, which is equivalent to raising the first isolation post 20-1, and can also improve its isolation effect on the vapor-deposited material.

[0057] In some embodiments, the base portion 022 and the protrusion portion 023 are made of the same material and are integrally formed. During the manufacturing of the display panel, a half-grayscale mask process can be used to create the pixel definition layer 02 to form the base portion 022 and the protrusion portion 023.

[0058] In some embodiments, the base 022 includes a light-shielding material, and the protrusion 023 includes a transparent material. In this embodiment, the base 022 and the protrusion 023 are fabricated separately. The base 022 is made of a light-shielding material to prevent light crosstalk between adjacent light-emitting devices, and the protrusion 023 is made of a transparent material to prevent blocking of large-angle light emitted by the light-emitting device and to ensure the light emission angle of the light-emitting device.

[0059] As shown in Figure 8, the angle formed by the plane containing the first side m2 and the substrate 00 towards the interior of the protrusion 023 is the second included angle α, where 10°≤α≤40°. This arrangement ensures that a large included angle can be formed between the first side m2 of the protrusion 023 and the first isolation pillar 20-1, which is more conducive to the formation of the inorganic encapsulation layer at the bottom of the first isolation pillar 20-1, further improving the encapsulation reliability. Moreover, the size of α in this embodiment is easy to achieve in terms of process technology, and the manufacturing difficulty is low.

[0060] As shown in Figure 8, along the direction e perpendicular to the plane containing the substrate 00, the height of the first side surface m2 is h1, where 0.3μm ≤ h1 ≤ 0.6μm. The height h1 of the first side surface m2 is understood as its length along direction e. In this embodiment, the height h1 of the first side surface m2 is not too large, which avoids the excessive height of the first isolation pillar 20-1 stacked on the protrusion 023, thus affecting the overall thickness of the display panel. In addition, the height h1 of the first side surface m2 is not too small, allowing the protrusion 023 to be manufactured to an appropriate size within the process capability, so as to better match the shape of the isolation pillar 20 and allow the inorganic encapsulation layer to be better formed at the bottom of the isolation pillar 20.

[0061] In other embodiments, Figure 9 is a partial schematic diagram of another display panel provided by an embodiment of the present invention, and Figure 10 is a simplified cross-sectional schematic diagram at the tangent BB′ position in Figure 9. Referring to Figures 9 and 10, the display panel includes support pillars 30, which are located on the side of the pixel definition layer 02 away from the substrate 00. The support pillars 30 are used to support the mask during the evaporation process to ensure uniform evaporation. The vertical distance between the surface of the support pillar 30 away from the substrate 00 and the substrate 00 is d1, and the vertical distance between the surface of the isolation pillar 20 away from the substrate 00 and the substrate 00 is d2, where d1 > d2. The present invention does not limit the arrangement of the support pillars 30 on the display panel; Figure 9 is only schematic. When the plane containing the substrate 00 is taken as the reference plane, the height of the isolation pillar 20 above the substrate 00 is less than the height of the support pillar 30, ensuring that the support pillars 30 support the mask during the evaporation process and preventing the isolation pillars 20 from being too high and affecting the evaporation yield.

[0062] Referring to the embodiment in Figure 8, when the first isolation pillar 20-1 is located above the protrusion 023, and the plane where the substrate 00 is located is taken as the reference plane, the height of the first isolation pillar 20-1 above the substrate 00 is also less than the height of the support pillar 30.

[0063] In some embodiments, 0.3μm ≤ d1 - d2 ≤ 0.6μm. This embodiment sets the difference between d1 and d2 to be not too large, ensuring that the height of the isolation pillar 20 is sufficiently large to guarantee its isolation effect on the vapor-deposited material. The difference between d1 and d2 is also not too small, ensuring that the support pillar 30 supports the mask during the vapor deposition process, preventing any impact on the vapor deposition yield.

[0064] In some embodiments, FIG11 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. As shown in FIG11, the display panel includes a pixel definition layer 02 located on one side of the substrate 00. The pixel definition layer 02 includes a plurality of openings 021. Referring to FIG3, the light-emitting device 10 is located within the openings 021. The isolation pillar 20 is located on the side of the pixel definition layer 02 away from the substrate 00. The pixel definition layer 02 includes a base portion 024 and a recessed portion 025, which are integrally formed. The base portion 024 and the openings 021 share a sidewall. The recessed portion 025 includes a first bottom surface m3 and a second side surface m4 connected to each other. The base portion 024 includes a second top surface m5 on the side away from the substrate 00. Along the direction e perpendicular to the plane where the substrate 00 is located, the vertical distance of the first bottom surface m3 from the substrate 00 is less than the vertical distance of the second top surface m5 from the substrate 00. The second side surface m4 connects the first bottom surface m3 and the second top surface m5. The isolation pillar 20 includes a second isolation pillar 20-2, which is in contact with the first bottom surface m3. In this embodiment, the second isolation pillar 20-2 is disposed at a low position of the pixel definition layer 02, so that the second isolation pillar 20-2 and the second side surface m4 of the recessed portion 025 can form a small angle. This can improve the deposition morphology of the inorganic encapsulation layer at the bottom of the second isolation pillar 20-2, reduce the generation of inorganic encapsulation layer cracks at the bottom position, and improve encapsulation reliability.

[0065] As shown in Figure 11, along the plane e perpendicular to the substrate 00, the height of the second side m4 is h2, and the maximum thickness of the base portion 024 is h0, where 0.3μm ≤ h2 ≤ h0. The height h2 of the second side m4 is equivalent to the recess depth of the recessed portion 025. When h2 is less than h0, a grayscale mask process can be used to create the pixel definition layer 02 during the manufacturing of the display panel to form the base portion 024 and the recessed portion 025. In this embodiment of the invention, h2 is set to a minimum of 0.3μm, which is easy to implement in the process and reduces the difficulty of the process.

[0066] As shown in Figure 11, the angle formed by the plane containing the second side m4 and the substrate 00 towards the interior of the recess 025 is the third included angle β, where 10°≤β≤40°. This arrangement ensures that a small included angle can be formed between the second side m4 of the recess 025 and the second isolation pillar 20-2, which can improve the deposition morphology of the inorganic encapsulation layer at the bottom of the second isolation pillar 20-2 and reduce the generation of inorganic encapsulation layer cracks at the bottom. Moreover, the size of β in this embodiment is easy to achieve in terms of process technology, and the manufacturing difficulty is low.

[0067] In an embodiment of the present invention, as shown in FIG4, the light-emitting device 10 includes a stacked first electrode 101, a light-emitting layer 105, and a second electrode 102. The first electrode 101 is located on the side of the second electrode 102 closest to the substrate 00. In some embodiments, FIG12 is a simplified schematic diagram of another display panel cross-section provided by an embodiment of the present invention, showing only the first electrode 101 in the light-emitting device 10. As shown in FIG12, the display panel includes a first metal structure 40, which is located on the same layer as the first electrode 102; along the direction e perpendicular to the plane of the substrate 00, the second isolation pillar 20-2 at least partially overlaps with the first metal structure 40. Along the direction e perpendicular to the plane of the substrate 00, the distance from the first bottom surface m3 to the first metal structure 40 is d3, where d3 ≥ 0.3 μm. When a metal structure is provided below the recess 025, a certain distance is provided between the bottom of the recess 025 and the metal structure so that the recess 025 does not expose the metal structure. This allows the second isolation post 20-2 to come into contact with the recess 025, which is made of a similar material, ensuring better adhesion and a more reliable contact connection between the two.

[0068] Figure 2 shows a top view of the display panel. It can be understood that the top view direction of the display panel is the same as the direction of projection onto the plane of the substrate. Therefore, the orthographic projection of the isolation pillar 20 onto the substrate coincides with the isolation pillar 20 in the top view. As can be seen from Figure 2, the orthographic projection of the isolation pillar 20 onto the substrate surrounds the orthographic projection of the light-emitting device 10 onto the substrate. That is, the isolation pillars 20 surrounding the light-emitting device 10 do not form a closed shape. This arrangement ensures that the isolation pillars 20 do not completely isolate the second electrode 102, allowing for electrical connection between the multiple second electrodes 102 of the multiple light-emitting devices 10 on the entire surface of the display panel.

[0069] In one embodiment, FIG13 is a partial schematic diagram of another display panel provided by an embodiment of the present invention. As shown in FIG13, the light-emitting device 10 includes a first light-emitting device 11, a second light-emitting device 12, and a third light-emitting device 13, each with a different color. Along the direction surrounding the light-emitting device 10, the isolation pillar 20 forms at least one break K; at the positions of two adjacent light-emitting devices 10, the break K is opposite to the isolation pillar 20 that at least partially surrounds the other light-emitting device 10. At the break K position, the organic functional layer is not interrupted, nor is the cathode layer formed by the second electrode. Setting the break K opposite to the isolation pillar 20 that at least partially surrounds the other light-emitting device 10 ensures that the second electrodes are interconnected throughout the entire display area and increases the current transmission path in the organic functional layer, thereby improving the lateral leakage current between the light-emitting devices 10.

[0070] In another embodiment, FIG14 is a partial schematic diagram of another display panel provided by an embodiment of the present invention. As shown in FIG14, the light-emitting device 10 includes a first light-emitting device 11, a second light-emitting device 12, and a third light-emitting device 13, each with a different color. Along the direction surrounding the light-emitting device 10, the isolation post 20 is formed with at least one break K; at the positions of two adjacent light-emitting devices 10, the break K is opposite to the isolation post 20 that at least partially surrounds another light-emitting device 10.

[0071] In another embodiment, FIG15 is a partial schematic diagram of another display panel provided by an embodiment of the present invention. As shown in FIG15, the light-emitting device 10 includes a first light-emitting device 11, a second light-emitting device 12, and a third light-emitting device 13, each with a different color. Along the direction surrounding the light-emitting device 10, the isolation post 20 is formed with at least one break K; at the positions of two adjacent light-emitting devices 10, the break K is opposite to the isolation post 20 that at least partially surrounds another light-emitting device 10.

[0072] In some embodiments, FIG16 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention. As shown in FIG16, the display panel includes an inorganic encapsulation layer 03, which covers the light-emitting device 10 and the isolation pillar 20 on the side away from the substrate 00 to form a whole layer. The inorganic encapsulation layer 03 includes a first sub-part 031, a second sub-part 032, a third sub-part 033, and a fourth sub-part 034 connected in sequence. The first sub-part 031 covers the top surface of the isolation pillar 20 on the side away from the substrate 00, the second sub-part 032 covers the inclined edge 22, the third sub-part covers the arc edge 23, and the fourth sub-part 034 covers the pixel definition layer 02. In this embodiment, the thickness of the first sub-part 031 is d11, the thickness of the second sub-part 032 is d12, the thickness of the third sub-part 033 is d13, and the thickness of the fourth sub-part 034 is d14. The thickness d11 of the first sub-part 031 is equal to the thickness d14 of the fourth sub-part 034, the thickness d12 of the second sub-part 032 is less than the thickness d11 of the first sub-part 031, and the thickness d13 of the third sub-part 033 is greater than the thickness d11 of the first sub-part 031. In this embodiment, after the light-emitting device 10 is fabricated, an inorganic encapsulation layer 03 is fabricated. The top surface of the isolation pillar 20 on the side away from the substrate 00 is substantially parallel to the plane where the substrate 00 is located. The plane where the pixel definition layer 02 is located is substantially parallel to the plane where the substrate 00 is located. The first sub-part 031 covers the top surface of the isolation pillar 20 on the side away from the substrate 00, and the fourth sub-part 034 covers the pixel definition layer 02. Therefore, the thickness d11 of the first sub-part 031 is equal to the thickness d14 of the fourth sub-part 034. Because the inclined edge 22 of the isolation pillar 20 is tilted relative to the plane of the substrate 00, the thickness of the second sub-section 032 covering the inclined edge 22 is relatively small. At the position of the arc-shaped edge 23, it is equivalent to the superposition of inorganic materials deposited laterally and longitudinally, so the thickness d13 of the third sub-section 033 is the largest at this position.

[0073] In this embodiment of the invention, the material used to fabricate the isolation pillar 20 includes a negative photoresist material. The exposed portion of the negative photoresist material is insoluble in the developer due to cross-linking and curing, while the unexposed portion is soluble in the developer. Using a negative photoresist material allows for the fabrication of an isolation pillar 20 with an approximately inverted trapezoidal shape.

[0074] In related technologies, the isolation pillars are generally made of thermosensitive photoresist materials. There is a baking and heating step between the exposure and development processes because the light in the exposure process alone is not enough to make the photoresist material react and solidify completely. A baking and heating process is required to solidify and shape the isolation pillar.

[0075] In this embodiment of the invention, the negative photoresist material includes a photosensitive negative photoresist material. The photosensitive negative photoresist material is more sensitive to light. When using a photosensitive negative photoresist material to fabricate the isolation pillar 20, a baking process is not required between the exposure and development processes. Then, an IUV process is added after the development process to achieve the morphology of the isolation pillar 20 required in this embodiment of the invention. Finally, high-temperature curing is used to fix the morphology.

[0076] Based on the same inventive concept, this invention also provides a method for manufacturing a display panel. The method includes: fabricating a light-emitting device and an isolation pillar on one side of a substrate, wherein the orthographic projection of the isolation pillar onto the substrate is located between the orthographic projections of adjacent light-emitting devices onto the substrate. Figure 17 is a flowchart of a method for manufacturing a display panel according to an embodiment of this invention. As shown in Figure 17, the method for fabricating the isolation pillar includes:

[0077] Step S101: Coat photoresist material 004, and form isolation pillar prototype 0-20 through exposure and development steps. Optionally, the coated photoresist material 004 is a photosensitive negative photoresist material. The isolation pillar prototype 0-20 has an approximately inverted trapezoidal shape.

[0078] Step S102: The initial isolation pillar 0-20 is subjected to IUV light irradiation to obtain the initial isolation pillar 1-20; IUV light refers to 365nm ultraviolet light. The photosensitive negative photoresist material is sensitive to IUV light. IUV irradiation causes further reactions of the carboxyl and aldehyde groups in the photosensitive negative photoresist. During the reaction, molecular recombination and aggregation result in an arc-shaped edge at the bottom corner of the initial isolation pillar 0-20. This step modifies the morphology of the initial isolation pillar 0-20.

[0079] Step S103: The initial isolation pillars 1-20 are cured to obtain isolation pillar 20. Optionally, the curing temperature is 200℃~300℃. After curing, the isolation pillar 20 has an arc-shaped edge 23. The display panel has a first cross-section M1, which is perpendicular to the plane of the substrate 00. In the first cross-section M1, the isolation pillar 20 includes a bottom edge 21, a sloping edge 22, and an arc-shaped edge 23. The bottom edge 21 is the side of the isolation pillar 20 closest to the substrate 00. The arc-shaped edge 23 connects the bottom edge 21 and the sloping edge 22. The angle formed between the sloping edge 22 and the plane of the substrate 00 facing outwards from the isolation pillar 20 is an acute angle. The arc-shaped edge 23 is recessed into the isolation pillar 20.

[0080] Using the manufacturing method provided in this embodiment of the invention, a preliminary isolation pillar 0-20 is first formed through an exposure and development process. Then, the preliminary isolation pillar 0-20 is subjected to IUV irradiation to obtain a preliminary isolation pillar 1-20. IUV irradiation allows the photoresist material to further react, and during the reaction, molecular recombination and aggregation cause the bottom corner of the preliminary isolation pillar 0-20 to form an arc-shaped edge, thus obtaining the preliminary isolation pillar 1-20. Finally, a curing process is performed to obtain an isolation pillar 20 with an arc-shaped edge 23 at the bottom corner. When fabricating the inorganic encapsulation layer, the inorganic material can be well deposited and smoothly transitioned at the arc-shaped edge 23 of the isolation pillar 20, avoiding the formation of encapsulation voids and cracks at the bottom corner of the isolation pillar 20, thereby improving the reliability of the display panel encapsulation.

[0081] In some embodiments, the IUV irradiation treatment in step S102 not only modifies the morphology at the bottom corner of the isolation pillar prototype 0-20, but also modifies the morphology at the corner of the isolation pillar prototype 0-20 away from the substrate 00, so that the corner is formed into an arc-shaped corner. As shown in Figure 17, step S103, which solidifies the isolation pillar prototype 1-20 to obtain the isolation pillar 20, also includes: the isolation pillar 20 has an arc-shaped corner 24, and the corner of the isolation pillar 20 away from the substrate 00 in the first cross-section M1 is an arc-shaped corner 24. The isolation pillar 20 obtained by the manufacturing method provided in the embodiments of the present invention has an arc-shaped edge 23 at the bottom corner and an arc-shaped corner 24 at the corner away from the substrate 00. The arc-shaped edge 23 enables the inorganic encapsulation layer to be deposited well at the bottom of the isolation pillar 20, avoiding the problem of encapsulation voids and cracks at the bottom corner of the isolation pillar 20. The use of the arc corner 24 can facilitate the formation and extension of the inorganic encapsulation layer on the inclined side 22. The combination of the arc bottom corner and the arc corner 24 on the isolation pillar 20 can enable the inorganic encapsulation layer to form a complete layer, thereby improving the encapsulation reliability.

[0082] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 18 is a schematic diagram of a display device provided in an embodiment of the present invention. As shown in Figure 18, the display device includes a display panel 100 provided in any embodiment of the present invention. The structure of the display panel has been described in the above embodiments and will not be repeated here. The display device provided in the embodiments of the present invention can be, for example, an electronic device with display function such as a mobile phone, tablet, computer, television, or smart wearable product.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, include: The substrate, the light-emitting device, and the isolation pillar are located on the same side of the substrate; The orthographic projection of the isolation pillar onto the substrate is located between the orthographic projections of the adjacent light-emitting devices onto the substrate; The display panel has a first cross-section, which is perpendicular to the plane of the substrate. In the first cross-section, the isolation pillar includes a bottom edge, a beveled edge, and an arc-shaped edge. The bottom edge is the side of the isolation pillar closest to the substrate. The arc-shaped edge connects the bottom edge and the beveled edge. The angle formed between the beveled edge and the plane where the substrate is located, facing outwards from the isolation pillar, is an acute angle. The arc-shaped edge is recessed into the isolation pillar.

2. The display panel according to claim 1, characterized in that, Along a direction perpendicular to the plane containing the substrate, the height of the arc-shaped edge is H1; along a first direction, the width of the arc-shaped edge is W1, and the first direction is parallel to the plane containing the substrate. Where 0.4≤H1 / W1≤2.

5.

3. The display panel according to claim 2, characterized in that, 0.2μm≤H1≤0.5μm, 0.2μm≤W1≤0.5μm.

4. The display panel according to claim 1, characterized in that, In the first cross-section, along the first direction, the arcuate edge does not extend beyond the end edge of the isolation pillar on the side away from the substrate, and the first direction is parallel to the plane where the substrate is located.

5. The display panel according to claim 4, characterized in that, Along the first direction, the distance between the arc-shaped edge and the end edge of the isolation pillar on the side away from the substrate is △W; Where, △W≥h / (3*tanθ); h is the height of the isolation pillar along the direction perpendicular to the plane where the substrate is located, and θ is the first angle formed between the hypotenuse and the plane where the substrate is located toward the outside of the isolation pillar.

6. The display panel according to claim 1, characterized in that, The display panel includes a pixel definition layer located on one side of the substrate, the pixel definition layer including a plurality of openings, and the light-emitting device located within the openings; the isolation pillar is located on the side of the pixel definition layer away from the substrate; The curved edge is in contact with the surface of the pixel definition layer on the side away from the substrate.

7. The display panel according to claim 1, characterized in that, In the first cross-section, the corner of the isolation pillar at the end furthest from the substrate is an arc-shaped corner.

8. The display panel according to claim 7, characterized in that, Along a direction perpendicular to the plane containing the substrate, the height of the arc-shaped corner is H2; along a first direction, the width of the arc-shaped corner is W2, and the first direction is parallel to the plane containing the substrate. Where 0.5≤H2 / W2≤2.

9. The display panel according to claim 8, characterized in that, 0.5μm≤H2≤0.9μm, 0.5μm≤W2≤0.9μm.

10. The display panel according to claim 7, characterized in that, Along a direction perpendicular to the plane containing the substrate, the height of the arc-shaped side is H1, the height of the arc-shaped corner is H2, and H2>H1; and / or, along a first direction, the width of the arc-shaped side is W1, the width of the arc-shaped corner is W2, and W2>W1, and the first direction is parallel to the plane containing the substrate.

11. The display panel according to claim 7, characterized in that, Along the plane perpendicular to the substrate, the height of the arc-shaped edge is H1, the height of the arc-shaped corner is H2, and the height of the isolation pillar is h; wherein, h-H1-H2≥h / 3.

12. The display panel according to claim 1, characterized in that, The angle formed by the hypotenuse and the plane containing the substrate toward the outside of the isolation pillar is a first included angle θ, where, 45°≤θ≤75°.

13. The display panel according to claim 1, characterized in that, The display panel includes a pixel definition layer located on one side of the substrate, the pixel definition layer including a plurality of openings, and the light-emitting device located within the openings; the isolation pillar is located on the side of the pixel definition layer away from the substrate; The pixel definition layer includes a base portion and a protrusion portion, the protrusion portion protruding from the base portion toward a side away from the substrate; the base portion and the opening share a sidewall; in the first cross-section, the edge of the base portion extends beyond the protrusion portion along a first direction, the first direction being parallel to the plane of the substrate; along a direction perpendicular to the plane of the substrate, the isolation pillar at least partially overlaps with the protrusion portion; the protrusion portion includes a first top surface and a first side surface connected to each other; in the first cross-section, the angle formed by the first top surface and the first side surface toward the interior of the protrusion portion is an obtuse angle; wherein... The isolation column includes a first isolation column, which is in contact with the first top surface.

14. The display panel according to claim 13, characterized in that, The base and the protrusion are integrally formed.

15. The display panel according to claim 13, characterized in that, The base portion includes a light-shielding material, and the protrusion portion includes a transparent material.

16. The display panel according to claim 13, characterized in that, The angle formed by the first side surface and the plane containing the substrate, pointing towards the interior of the protrusion, is the second included angle α. 10°≤α≤40°。 17. The display panel according to claim 13, characterized in that, Along the plane perpendicular to the substrate, the height of the first side surface is h1, where 0.3μm≤h1≤0.6μm.

18. The display panel according to claim 1, characterized in that, The display panel further includes a support pillar and a pixel definition layer located on one side of the substrate, wherein the support pillar is located on the side of the pixel definition layer away from the substrate; Wherein, the vertical distance between the surface of the support pillar on the side away from the substrate and the substrate is d1, and the vertical distance between the surface of the isolation pillar on the side away from the substrate and the substrate is d2, where d1>d2.

19. The display panel according to claim 18, characterized in that, 0.3μm≤d1-d2≤0.6μm.

20. The display panel according to claim 1, characterized in that, The display panel includes a pixel definition layer located on one side of the substrate, the pixel definition layer including a plurality of openings, and the light-emitting device located within the openings; the isolation pillar is located on the side of the pixel definition layer away from the substrate; The pixel definition layer includes a base portion and a recessed portion, the base portion and the recessed portion being integrally formed; the base portion and the opening share a sidewall; the recessed portion includes a first bottom surface and a second side surface connected to each other, the base portion includes a second top surface on the side away from the substrate; along a direction perpendicular to the plane of the substrate, the vertical distance from the first bottom surface to the substrate is less than the vertical distance from the second top surface to the substrate; the second side surface connects the first bottom surface and the second top surface; wherein... The isolation column includes a second isolation column, which is in contact with the first bottom surface.

21. The display panel according to claim 20, characterized in that, Along the plane perpendicular to the substrate, the height of the second side is h2, and the maximum thickness of the base is h0, where 0.3μm≤h2≤h0.

22. The display panel according to claim 20, characterized in that, The angle formed by the second side surface and the plane containing the substrate, pointing towards the interior of the recess, is the third included angle β. 10°≤β≤40°。 23. The display panel according to claim 20, characterized in that, The light-emitting device includes a stacked first electrode, a light-emitting layer, and a second electrode, wherein the first electrode is located on the side of the second electrode closer to the substrate; The display panel includes a first metal structure, which is located on the same layer as the first electrode; along a plane perpendicular to the substrate, the second isolation pillar at least partially overlaps with the first metal structure. Wherein, along the direction perpendicular to the plane where the substrate is located, the distance between the first bottom surface and the first metal structure is d3, where d3≥0.3μm.

24. The display panel according to claim 1, characterized in that, The isolation column is made of a negative photoresist material.

25. The display panel according to claim 24, characterized in that, The negative photoresist material includes a photosensitive negative photoresist material.

26. The display panel according to claim 1, characterized in that, The isolation pillar surrounds the orthogonal projection of the light-emitting device onto the substrate.

27. The display panel according to claim 26, characterized in that, Along the direction surrounding the light-emitting device, the isolation pillar has at least one break; At two adjacent locations of the light-emitting devices, the break is opposite to the isolation post that at least partially surrounds the other light-emitting device.

28. The display panel according to claim 1, characterized in that, The display panel includes a pixel definition layer located on one side of the substrate, the pixel definition layer including a plurality of openings, and the light-emitting device located within the openings; the isolation pillar is located on the side of the pixel definition layer away from the substrate; The light-emitting device includes an organic functional layer deposited within the opening and extending outside the opening; the display panel further includes an organic functional portion covering the isolation pillar on the side of the isolation pillar away from the substrate; wherein... The organic functional part and the organic functional layer are made of the same material, and at the location of the isolation column, the organic functional part and the organic functional layer are separated from each other.

29. The display panel according to claim 28, characterized in that, The display panel further includes an inorganic encapsulation layer, which covers the light-emitting device and the isolation pillar on the side away from the substrate to form a single layer; The inorganic encapsulation layer includes a first sub-part, a second sub-part, a third sub-part, and a fourth sub-part connected in sequence. The first sub-part covers the top surface of the isolation pillar on the side away from the substrate, the second sub-part covers the beveled edge, the third sub-part covers the arc-shaped edge, and the fourth sub-part covers the pixel definition layer. The thickness of the first sub-part is equal to the thickness of the fourth sub-part, the thickness of the second sub-part is less than the thickness of the first sub-part, and the thickness of the third sub-part is greater than the thickness of the first sub-part.

30. The display panel according to claim 1, characterized in that, The light-emitting device includes a first electrode and a second electrode, and at least two light-emitting layers located between the first electrode and the second electrode, with a charge-generating layer disposed between adjacent light-emitting layers.

31. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 30.

32. A method for manufacturing a display panel, characterized in that, The fabrication method includes: fabricating a light-emitting device and an isolation pillar on one side of a substrate, wherein the orthographic projection of the isolation pillar onto the substrate is located between the orthographic projections of adjacent light-emitting devices onto the substrate; the fabrication method of the isolation pillar includes: The photoresist material is coated and then exposed and developed to form the initial shape of the isolation column; The initial shape of the isolation column is obtained by IUV irradiation treatment. The isolation pillar is obtained by curing the initial shape of the isolation pillar, and the isolation pillar has an arc-shaped edge; wherein, the display panel has a first cross-section, the first cross-section being perpendicular to the plane of the substrate; in the first cross-section, the isolation pillar includes a bottom edge, a hypotenuse, and the arc-shaped edge, the bottom edge being the side of the isolation pillar closest to the substrate, the arc-shaped edge connecting the bottom edge and the hypotenuse, the angle formed between the hypotenuse and the plane of the substrate facing outwards from the isolation pillar being an acute angle, and the arc-shaped edge being recessed inwards from the isolation pillar.

33. The manufacturing method according to claim 32, characterized in that, The isolation pillar is obtained by curing the initial shape of the isolation pillar, and further includes: the isolation pillar has an arc-shaped corner, wherein the corner of the isolation pillar at the end away from the substrate in the first cross section is the arc-shaped corner.

34. The manufacturing method according to claim 32, characterized in that, The process involves coating a photoresist material and then exposing and developing it to form a preliminary isolation pillar, including coating a photosensitive negative photoresist material.

Images