Display panel and display device

Abstract

This application relates to a display panel and a display device. The display panel includes: a substrate; a first electrode layer disposed on one side of the substrate, the first electrode layer including spaced-apart first electrode portions; a light-emitting functional layer disposed on the side of the first electrode layer away from the substrate, the light-emitting functional layer including spaced-apart light-emitting functional portions disposed on the side of the first electrode portions away from the substrate; a partition structure located between adjacent light-emitting functional portions; a first encapsulation layer and a second encapsulation layer, the second encapsulation layer being disposed on the side of the first encapsulation layer away from the substrate, the first encapsulation layer including spaced-apart encapsulation portions for encapsulating the light-emitting functional portions, the refractive index of the encapsulation portions being different from the refractive index of the second encapsulation layer, so that the interface between the encapsulation portions and the second encapsulation layer forms a light converging unit. By constructing light converging units distributed on the display panel through the high and low refractive index changes of the encapsulation portions and the second encapsulation layer, the light extraction efficiency of the display panel can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] In recent years, OLED (Organic Light-Emitting Diode) has received widespread attention due to its huge application market in the display field. Compared with other display technologies, OLED modules have many advantages, such as wide viewing angle, fast response speed, no need for backlighting, and the ability to achieve flexible displays.

[0003] There is still room for improvement in the light emission efficiency of OLED display panels in related technologies. Summary of the Invention

[0004] Therefore, it is necessary to provide a display panel and display device that aim to improve the light emission efficiency of the display panel.

[0005] According to one aspect of this application, a display panel is provided. The display panel includes: a substrate; a first electrode layer disposed on one side of the substrate, the first electrode layer including spaced-apart first electrode portions; a light-emitting functional layer disposed on the side of the first electrode layer facing away from the substrate, the light-emitting functional layer including spaced-apart light-emitting functional portions disposed on the side of the first electrode portions facing away from the substrate; a partition structure located between adjacent light-emitting functional portions; a first encapsulation layer and a second encapsulation layer, the second encapsulation layer being disposed on the side of the first encapsulation layer facing away from the substrate, the first encapsulation layer including spaced-apart encapsulation portions for encapsulating the light-emitting functional portions, the refractive index of the encapsulation portions being different from the refractive index of the second encapsulation layer, so that the interface between the encapsulation portions and the second encapsulation layer forms a light converging unit.

[0006] The display panel in this embodiment includes a first encapsulation layer and a second encapsulation layer. The first encapsulation layer includes a plurality of spaced-apart encapsulation portions, each corresponding to a light-emitting functional portion, which encapsulates the corresponding light-emitting functional portion. The refractive index of the encapsulation portion is not equal to that of the second encapsulation layer, so that a light-converging unit is formed at the interface between the encapsulation portion and the second encapsulation layer. Thus, a corresponding light-converging unit with light extraction function is formed on the light-emitting side of each light-emitting functional portion. In other words, by utilizing the high and low refractive index variation between the encapsulation portion and the second encapsulation layer, a large number of light-converging units distributed throughout the display panel are constructed, thereby improving the light extraction efficiency of the display panel.

[0007] In some embodiments, the interface includes a convex contact surface and a concave contact surface that fit together, wherein in the encapsulation portion and the second encapsulation layer, the refractive index of the one having the convex contact surface is greater than the refractive index of the one having the concave contact surface.

[0008] In some embodiments, the first encapsulation layer is an inorganic film layer, and the second encapsulation layer is an organic film layer.

[0009] In some embodiments, the convex contact surface is disposed on the encapsulation portion, the concave contact surface is disposed on the second encapsulation layer, and the refractive index of the encapsulation portion is greater than the refractive index of the second encapsulation layer.

[0010] In some embodiments, the refractive index of the encapsulation portion is 1.6 to 2.0, and the refractive index of the second encapsulation layer is 1.4 to 1.6.

[0011] In some embodiments, the partition structure defines a first opening, the encapsulation portion is configured to encapsulate the first opening, and the light-emitting functional portion is disposed within the first opening; the convex contact surface is disposed close to the top surface of the partition structure, and the distance from any point on the convex contact surface to the substrate is greater than or equal to the distance from the top surface of the partition structure to the substrate.

[0012] In some embodiments, the convex contact surface is disposed on the second encapsulation layer, the concave contact surface is disposed on the encapsulation portion, and the refractive index of the second encapsulation layer is greater than the refractive index of the encapsulation portion.

[0013] In some embodiments, the refractive index of the encapsulation portion is 1.4 to 1.6, and the refractive index of the second encapsulation layer is 1.6 to 2.0.

[0014] In some embodiments, the partition structure defines a first opening, the encapsulation portion is configured to encapsulate the first opening, and the light-emitting functional portion is disposed within the first opening; the convex contact surface is disposed close to the top surface of the partition structure, and the distance from any point on the convex contact surface to the substrate is less than or equal to the distance from the top surface of the partition structure to the substrate.

[0015] In some embodiments, the plane containing the convex contact surface and the top surface of the partition structure together defines a protruding structure, and the cross-sectional shape of the protruding structure on a section perpendicular to the plane containing the display panel is trapezoidal, rectangular, or arc-shaped.

[0016] In some embodiments, the display panel further includes: a second electrode layer disposed on the side of the light-emitting functional layer away from the substrate, the second electrode layer including spaced second electrode portions disposed on the side of the light-emitting functional layer away from the substrate, the encapsulation portion being further used to encapsulate the second electrode portions; the partition structure including a conductive material, the second electrode portions being electrically connected to the conductive material.

[0017] In some embodiments, the partition structure includes an isolator and a blocking portion, the blocking portion being located on the side of the isolator away from the substrate, the top surface of the isolator being projected onto the substrate in the orthographic projection of the substrate, and the bottom surface of the blocking portion being projected onto the substrate in the orthographic projection of the substrate, the isolator comprising the conductive material.

[0018] In some embodiments, the orthographic projection of the top surface of the isolator onto the substrate lies within the orthographic projection of the bottom surface of the isolator onto the substrate, or the orthographic projection of the top surface of the isolator onto the substrate coincides with the orthographic projection of the bottom surface of the isolator onto the substrate.

[0019] In some embodiments, the orthographic projection of the top surface of the blocking portion onto the substrate is located within the orthographic projection of the bottom surface of the blocking portion onto the substrate, or the orthographic projection of the top surface of the blocking portion onto the substrate coincides with the orthographic projection of the bottom surface of the blocking portion onto the substrate.

[0020] In some embodiments, the partition structure further includes a support portion located on the side of the isolator close to the substrate; the bottom surface of the isolator is projected onto the substrate in the orthographic projection of the top surface of the support portion onto the substrate; the support portion includes a conductive material, and the second electrode portion is electrically connected to the support portion.

[0021] In some embodiments, the display panel further includes: a pixel definition layer disposed on the side of the first electrode layer opposite to the substrate, the pixel definition layer having a plurality of pixel definition openings, the orthographic projection of the pixel definition openings on the substrate overlapping the orthographic projection of the first electrode portion on the substrate, and at least a portion of the light-emitting functional portion being located within the pixel definition openings.

[0022] According to another aspect of this application, a display device is provided, the display device comprising the display panel of any of the above embodiments.

[0023] The display device in this embodiment includes a display panel comprising a first encapsulation layer and a second encapsulation layer. The first encapsulation layer includes a plurality of spaced-apart encapsulation portions, each corresponding to a light-emitting functional portion, which encapsulates the corresponding light-emitting functional portion. The refractive index of the encapsulation portion is not equal to that of the second encapsulation layer, so that a light-converging unit is formed at the interface between the encapsulation portion and the second encapsulation layer. Thus, a corresponding light-converging unit with light extraction function is formed on the light-emitting side of each light-emitting functional portion. In other words, by utilizing the high and low refractive index variation between the encapsulation portion and the second encapsulation layer, a large number of light-converging units distributed throughout the display panel are constructed, thereby improving the light extraction efficiency of the display panel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application;

[0025] Figure 2 This is a cross-sectional schematic diagram of a display panel in one embodiment of this application (the dashed arrows in the figure represent light rays);

[0026] Figure 3 This is a cross-sectional schematic diagram of a display panel according to another embodiment of this application (the dashed arrows in the figure represent light rays);

[0027] Figure 4 This is a schematic diagram of the substrate to be vapor-deposited in one embodiment of this application;

[0028] Figure 5 This is a schematic diagram showing the fabrication of a sub-pixel in the first sub-pixel region of the substrate to be vapor-deposited in one embodiment of this application.

[0029] Figure 6 This is a schematic diagram showing the completion of sub-pixel fabrication in the second sub-pixel region of the substrate to be vapor-deposited in one embodiment of this application.

[0030] Figure 7 This is a schematic diagram illustrating the fabrication of the third sub-pixel region of the substrate to be vapor-deposited in one embodiment of this application. Detailed Implementation

[0031] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements present. Furthermore, when a layer is referred to as being "below" another layer, it may be directly below it or there may be one or more intermediate elements present. It is also understood that when a layer is referred to as being "between" two layers, it may be the only layer between the two layers, or there may be one or more intermediate elements present.

[0034] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0035] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0036] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0037] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0038] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0039] In recent years, OLED (Organic Light-Emitting Diode) has received widespread attention due to its huge application market in the display field. Compared with other display technologies, OLED modules have many advantages, such as wide viewing angle, fast response speed, no need for backlighting, and the ability to achieve flexible displays.

[0040] There is still room for improvement in the light emission efficiency of OLED display panels in related technologies.

[0041] To address the aforementioned issues, the embodiments of the first aspect of this application provide a display panel 100 designed to improve the light emission efficiency of the display panel 100.

[0042] like Figure 1 Diagram and Figure 3 As shown, the display panel 100 in the first aspect embodiment of this application includes a substrate 110, a first electrode layer 120, a light-emitting functional layer 130, a partition structure 140, a first encapsulation layer 170, and a second encapsulation layer 180. The first electrode layer 120 is disposed on one side of the substrate 110 and includes spaced-apart first electrode portions 121. The light-emitting functional layer 130 is disposed on the side of the first electrode layer 120 facing away from the substrate 110 and includes spaced-apart light-emitting functional portions 131 disposed on the side of the first electrode portions 121 facing away from the substrate 110. The partition structure 140 is located between adjacent light-emitting functional portions 131. The second encapsulation layer 180 is disposed on the side of the first encapsulation layer 170 away from the substrate 110. The first encapsulation layer 170 includes encapsulation portions 171 spaced apart. The encapsulation portions 171 are used to encapsulate the light-emitting functional portion 131. The refractive index of the encapsulation portions 171 is not equal to the refractive index of the second encapsulation layer 180, so that the interface 200 between the encapsulation portions 171 and the second encapsulation layer 180 forms a light converging unit.

[0043] Specifically, the display panel 100 may be an OLED display panel 100, wherein the substrate 110 may include a substrate and a driving circuit layer disposed on the substrate. The substrate may be a rigid substrate or a flexible substrate. When the substrate is a rigid substrate, the substrate material may be glass or silicon wafer, etc. When the substrate is a flexible substrate, the substrate material may be metal foil, polymer plastic, etc.

[0044] The first electrode layer 120 is the anode layer of the display panel 100. The first electrode layer 120 includes a plurality of spaced-apart first electrode portions 121, which are the anodes of the OLED light-emitting elements. The light-emitting functional layer 130 includes a plurality of spaced-apart light-emitting functional portions 131, which are the light-emitting portions of the OLED light-emitting elements. The light-emitting functional portion 131 specifically includes an organic light-emitting layer, and may also include organic auxiliary film layers such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer.

[0045] The partition structure 140 is disposed between adjacent light-emitting functional parts 131, that is, multiple light-emitting functional parts 131 can be isolated by the partition structure 140.

[0046] The first encapsulation layer 170 includes a plurality of encapsulation portions 171 spaced apart, and each encapsulation portion 171 has a one-to-one correspondence with a light-emitting functional portion 131, that is, the encapsulation portion 171 is used to encapsulate the corresponding light-emitting functional portion 131. The second encapsulation layer 180 is disposed on the side of the first encapsulation layer 170 away from the substrate 110, and the second encapsulation layer 180 may be a film layer disposed on the entire surface.

[0047] The display panel 100 in this embodiment includes a first encapsulation layer 170 and a second encapsulation layer 180. The first encapsulation layer 170 includes a plurality of spaced-apart encapsulation portions 171, each corresponding to a light-emitting functional portion 131, and encapsulating the corresponding light-emitting functional portion 131. The refractive index of the encapsulation portion 171 is not equal to that of the second encapsulation layer 180, so that the interface 200 between the encapsulation portion 171 and the second encapsulation layer 180 forms a light-converging unit. Thus, a corresponding light-converging unit with light extraction function is formed on the light-emitting side of each light-emitting functional portion 131. In other words, by utilizing the high and low refractive index difference between the encapsulation portion 171 and the second encapsulation layer 180, a large number of light-converging units distributed in the display panel 100 are constructed, thereby improving the light extraction efficiency of the display panel 100.

[0048] It should be noted that the display panel 100 in this embodiment isolates the light-emitting functional part 131 through the partition structure 140. The manufacturing method of this display panel 100 using the partition structure 140 differs from that of traditional display panels, primarily in the sub-pixel manufacturing process. To better understand the technical solution in this application, it is necessary to describe the sub-pixel manufacturing process of the display panel 100. For example... Figure 4The substrate 200 to be vapor-deposited shown has a first sub-pixel region 201, a second sub-pixel region 202 and a third sub-pixel region 203. The first sub-pixel region 201 is used to accommodate a first color sub-pixel, the second sub-pixel region 202 is used to accommodate a second color sub-pixel, and the third sub-pixel region 203 is used to accommodate a third color sub-pixel.

[0049] like Figures 4 to 7 As shown, in one embodiment, the sub-pixel fabrication process is as follows:

[0050] First, a first-color light-emitting material layer is deposited across the entire surface of the substrate 200 to be deposited. The first-color light-emitting material layer is patterned using photolithography, retaining only the portion of the first-color light-emitting material layer located in the first sub-pixel region 201 to form a light-emitting functional part 131 for emitting the first-color light. Next, a second electrode material layer is deposited across the entire surface of the substrate 200. The second electrode material layer is patterned using photolithography, retaining only the portion of the second electrode material layer located in the first sub-pixel region 201 to form a second electrode part 151 corresponding to the light-emitting functional part 131 for emitting the first-color light. Then, a first encapsulation material layer is fabricated on the substrate 200. The first encapsulation material layer is patterned using photolithography, retaining only the portion of the first encapsulation material layer located in the first sub-pixel region 201 to form an encapsulation part 171 encapsulating the first sub-pixel region 201. The display panel 100 is now in the following state: Figure 5 As shown.

[0051] Then, a second color luminescent material layer is deposited on the entire surface of the substrate 200 to be deposited. The second color luminescent material layer is patterned using photolithography, retaining only the portion of the second color luminescent material layer located in the second sub-pixel region 202 to form a luminescent functional part 131 for emitting second color light. Next, a second electrode material layer is deposited on the entire surface of the substrate 200 to be deposited. The second electrode material layer is patterned using photolithography, retaining only the portion of the second electrode material layer located in the second sub-pixel region 202 to form a second electrode part 151 corresponding to the luminescent functional part 131 for emitting second color light. Afterward, a first encapsulation material layer is fabricated on the substrate 200 to be deposited. The first encapsulation material layer is patterned using photolithography, retaining only the portion of the first encapsulation material layer located in the second sub-pixel region 202 to form an encapsulation part 171 encapsulating the second sub-pixel region 202. The display panel 100 is now in the following state: Figure 6 As shown.

[0052] Next, a third-color light-emitting material layer is deposited over the entire surface of the substrate 200 to be deposited. The third-color light-emitting material layer is patterned using photolithography, retaining only the portion of the third-color light-emitting material layer located in the third sub-pixel region 203 to form a light-emitting functional part 131 for emitting third-color light. Then, a second electrode material layer is deposited over the entire surface of the substrate 200 to be deposited. The second electrode material layer is patterned using photolithography, retaining only the portion of the second electrode material layer located in the third sub-pixel region 203 to form a second electrode part 151 corresponding to the light-emitting functional part 131 for emitting third-color light. Finally, a first encapsulation material layer is fabricated on the substrate 200 to be deposited. The first encapsulation material layer is patterned using photolithography, retaining only the portion of the first encapsulation material layer located in the third sub-pixel region 203 to form an encapsulation part 171 encapsulating the third sub-pixel region 203. The display panel 100 is now in the following state: Figure 7 As shown.

[0053] In another implementation, the sub-pixel fabrication process is as follows:

[0054] First, a first color emitting material layer, a second electrode material layer, and a first encapsulation material layer are sequentially deposited on the substrate 200 to be deposited. Photolithography is then used to pattern the first color emitting material layer, the second electrode material layer, and the first encapsulation material layer, retaining only the portions of the first color emitting material layer, the second electrode material layer, and the first encapsulation material layer located in the first sub-pixel region 201, to form a light-emitting functional part 131 for emitting the first color light, and its corresponding second electrode part 151 and encapsulation part 171. The display panel at this time is as follows: Figure 5 As shown.

[0055] Then, a second color emitting material layer, a second electrode material layer, and a first encapsulation material layer are sequentially deposited on the substrate 200 to be deposited. The second color emitting material layer, the second electrode material layer, and the first encapsulation material layer are patterned using photolithography, retaining only the portions of the second color emitting material layer, the second electrode material layer, and the first encapsulation material layer located in the second sub-pixel region 202, to form a light-emitting functional part 131 for emitting second color light, and its corresponding second electrode part 151 and encapsulation part 171. The display panel at this time is as follows: Figure 6 As shown.

[0056] Subsequently, a third-color light-emitting material layer, a second electrode material layer, and a first encapsulation material layer are sequentially deposited on the substrate 200 to be deposited. Photolithography is then used to pattern the third-color light-emitting material layer, the second electrode material layer, and the first encapsulation material layer, retaining only the portions of the third-color light-emitting material layer, the second electrode material layer, and the first encapsulation material layer located in the third sub-pixel region 203, to form a light-emitting functional part 131 for emitting third-color light, and its corresponding second electrode part 151 and encapsulation part 171. The display panel at this time is as follows: Figure 7 As shown.

[0057] As can be seen from the above manufacturing process, the above manufacturing process replaces the FMM (fine metal mask) used in the traditional manufacturing process. Since the manufacturing precision of photolithography is significantly higher than that of evaporation using FMM, the above manufacturing process can achieve a higher PPI (Pixels Per Inch).

[0058] In some embodiments, such as Figure 2 , Figure 3 As shown, the interface 200 includes convex and concave contact surfaces that fit together. In the encapsulation portion 171 and the second encapsulation layer 180, the refractive index of the one with the convex contact surface is greater than that of the one with the concave contact surface. With this configuration, by varying the high and low refractive indices of the encapsulation portion 171 and the second encapsulation layer 180, and in conjunction with the shapes of the contact surfaces of the encapsulation portion 171 and the second encapsulation layer 180, a light converging unit with light extraction function can be constructed.

[0059] Furthermore, the first encapsulation layer 170 can be an inorganic film layer, whose main function is to isolate water vapor and oxygen, thereby preventing water and oxygen intrusion that could damage or malfunction the light-emitting functional unit 131. The second encapsulation layer 180 can be an organic film layer, which mainly provides flexibility. In addition, the organic film layer also serves as a planarization layer, i.e., it plays a planarization role.

[0060] In some embodiments, such as Figure 2 As shown, a convex contact surface is disposed on the encapsulation portion 171, and a concave contact surface is disposed on the second encapsulation layer 180. The refractive index of the encapsulation portion 171 is greater than that of the second encapsulation layer 180. That is, at the junction of the encapsulation portion 171 and the second encapsulation layer 180, the encapsulation portion 171 has an outward convex shape, and the second encapsulation layer 180 has an inward concave shape. Furthermore, the refractive index of the encapsulation portion 171 is greater than that of the second encapsulation layer 180. Therefore, a light-gathering unit with light extraction function can be constructed on the light-emitting side of the light-emitting functional portion 131. Under the action of the light-gathering unit, light emitted from the light-emitting functional portion 131 at a preset emission angle can be modulated to a positive viewing angle.

[0061] Furthermore, the refractive index of the encapsulation portion 171 can be 1.6 to 2.0, and the refractive index of the second encapsulation layer 180 can be 1.4 to 1.6. This allows the refractive index of the encapsulation portion 171 to be greater than that of the second encapsulation layer 180, facilitating the construction of a light-converging unit with light extraction capabilities. Additionally, materials within the aforementioned refractive index range and possessing good light transmittance are commonly used, which also helps to reduce the manufacturing cost of the display panel 100.

[0062] In some embodiments, the partition structure 140 defines a first opening 145, the encapsulation portion 171 is configured to encapsulate the first opening 145, and the light-emitting functional portion 131 is disposed within the first opening 145. A convex contact surface is disposed near the top surface of the partition structure 140, and the distance from any point on the convex contact surface to the substrate 110 is greater than or equal to the distance from the top surface of the partition structure 140 to the substrate 110. In this embodiment, the partition structure 140 defines a plurality of first openings 145, and each light-emitting functional portion 131 is disposed within a corresponding first opening 145, thereby isolating each light-emitting functional portion 131 by the partition structure 140. Furthermore, the distance from any point on the convex contact surface to the substrate 110 is greater than or equal to the distance from the top surface of the partition structure 140 to the substrate 110; that is, in the thickness direction of the display panel 100, the convex contact surface can protrude beyond the first opening 145.

[0063] Specifically, the plane containing the convex contact surface and the top surface of the partition structure 140 together defines the protruding structure. The cross-sectional shape of the display panel 100 on the cross-section perpendicular to the plane containing the display panel 100 can be trapezoidal, rectangular, or arc-shaped. Through multiple experiments, it has been verified that the protruding structure, using the aforementioned shapes, can ensure that the interface 200 formed by the convex and concave contact surfaces, in conjunction with the refractive index change between the encapsulation portion 171 and the second encapsulation layer 180, can form a light-converging unit with light extraction capabilities.

[0064] In other embodiments, such as Figure 3 As shown, a convex contact surface is disposed on the second encapsulation layer 180, and a concave contact surface is disposed on the encapsulation portion 171. The refractive index of the second encapsulation layer 180 is greater than that of the encapsulation portion 171. That is, at the junction of the encapsulation portion 171 and the second encapsulation layer 180, the encapsulation portion 171 has an inwardly concave shape, and the second encapsulation layer 180 has an outwardly convex shape. Simultaneously, the refractive index of the second encapsulation layer 180 is greater than that of the encapsulation portion 171. Therefore, a light-gathering unit with light extraction function can be constructed on the light-emitting side of the light-emitting functional unit 131. Under the action of the light-gathering unit, light emitted from the light-emitting functional unit 131 at a preset light-emitting angle can be modulated to a positive viewing angle.

[0065] Furthermore, the refractive index of the encapsulation portion 171 can be 1.4 to 1.6, and the refractive index of the second encapsulation layer 180 can be 1.6 to 2.0. This allows the refractive index of the second encapsulation layer 180 to be greater than that of the encapsulation portion 171, facilitating the construction of a light-converging unit with light extraction capabilities. Additionally, materials within the aforementioned refractive index range and possessing good light transmittance are commonly used, which also helps to reduce the manufacturing cost of the display panel 100.

[0066] In some embodiments, the partition structure 140 defines a first opening 145, the encapsulation portion 171 is configured to encapsulate the first opening 145, and the light-emitting functional portion 131 is disposed within the first opening 145. A convex contact surface is disposed near the top surface of the partition structure 140, and the distance from any point on the convex contact surface to the substrate 110 is less than or equal to the distance from the top surface of the partition structure 140 to the substrate 110. In this embodiment, the partition structure 140 defines a plurality of first openings 145, and each light-emitting functional portion 131 is disposed within a corresponding first opening 145, thereby isolating each light-emitting functional portion 131 by the partition structure 140. Furthermore, the distance from any point on the convex contact surface to the substrate 110 is less than or equal to the distance from the top surface of the partition structure 140 to the substrate 110; that is, in the thickness direction of the display panel 100, the convex contact surface can be recessed into the first opening 145.

[0067] Specifically, the plane containing the convex contact surface and the top surface of the partition structure 140 together defines the protruding structure. The cross-sectional shape of the display panel 100 on the cross-section perpendicular to the plane containing the display panel 100 can be trapezoidal, rectangular, or arc-shaped. Through multiple experiments, it has been verified that the protruding structure, using the aforementioned shapes, can ensure that the interface 200 formed by the convex and concave contact surfaces, in conjunction with the refractive index change between the encapsulation portion 171 and the second encapsulation layer 180, can form a light-converging unit with light extraction capabilities.

[0068] In some embodiments, the display panel 100 further includes a second electrode layer 150, which is disposed on the side of the light-emitting functional layer 130 facing away from the substrate 110. The second electrode layer 150 includes spaced-apart second electrode portions 151, which are disposed on the side of the light-emitting functional layer 131 facing away from the substrate 110. The encapsulation portion 171 is also used to encapsulate the second electrode portions 151. The partition structure 140 includes a conductive material, and the second electrode portions 151 are electrically connected to the conductive material. It is understood that the second electrode layer 150 is the cathode layer of the display panel 100, and the second electrode layer 150 includes a plurality of spaced-apart second electrode portions 151, which are the cathodes of the OLED light-emitting elements. In addition, the encapsulation portion 171 also encapsulates the second electrode portions 151, that is, the second electrode portions 151 are disposed between the light-emitting functional layer 131 and the encapsulation portion 171. Thus, the first electrode portion 121, the light-emitting functional layer 131, and the second electrode portion 151 can all be encapsulated and protected. Furthermore, the partition structure 140 includes a conductive material, and the second electrode portion 151 is electrically connected to the conductive material. This arrangement allows the second electrode portions 151, which are spaced apart from each other, to be electrically connected through the partition structure 140. As a result, multiple cathodes are electrically connected to each other. This helps to reduce the number of cathode traces connected to the cathodes in the display panel 100. Since the number of cathode traces affects the size of the bezel area of ​​the display panel 100, it is beneficial to achieve a narrow bezel design for the display panel 100.

[0069] In some embodiments, the partition structure 140 includes an isolator 141 and a blocking portion 142. The blocking portion 142 is located on the side of the isolator 141 facing away from the substrate 110. The top surface of the isolator 141, when projected onto the substrate 110, is within the projection of the bottom surface of the blocking portion 142 onto the substrate 110. The isolator 141 comprises the conductive material. The isolator 141 is mainly used to isolate the light-emitting functional portion 131 in the light-emitting functional layer 130 and the second electrode portion 151 in the second electrode layer 150. The blocking portion 142 is located on the side of the isolator 141 facing away from the substrate 110, and the top surface of the isolator 141, when projected onto the substrate 110, is within the projection of the bottom surface of the blocking portion 142 onto the substrate 110. That is, there is a certain distance between the edge of the bottom surface of the blocking portion 142 and the edge of the top surface of the isolator 141, thereby forming a stepped structure between the bottom surface of the blocking portion 142 and the top surface of the isolator 141. The presence of the stepped structure facilitates the separation of the light-emitting material layers formed on different sides of the partition structure 140 during the vapor deposition process. Furthermore, since the isolator 141 includes the conductive material, the second cathode portion can be electrically connected to the partition structure 140 by overlapping the conductive material with the isolator 141.

[0070] Furthermore, the orthographic projection of the top surface of the isolator 141 onto the substrate 110 lies within the orthographic projection of the bottom surface of the isolator 141 onto the substrate 110, or the orthographic projection of the top surface of the isolator 141 onto the substrate 110 coincides with the orthographic projection of the bottom surface of the isolator 141 onto the substrate 110. In other words, the cross-sectional shape of the isolator 141 on a section perpendicular to the plane of the display panel 100 can be trapezoidal or rectangular. It is readily understood that when the cross-sectional shape of the isolator 141 on a section perpendicular to the plane of the display panel 100 is trapezoidal, it is beneficial to improve the overlap stability of the second electrode portion 151 on the isolator 141.

[0071] Furthermore, the orthographic projection of the top surface of the blocking portion 142 onto the substrate 110 lies within the orthographic projection of the bottom surface of the blocking portion 142 onto the substrate 110, or the orthographic projection of the top surface of the blocking portion 142 onto the substrate 110 coincides with the orthographic projection of the bottom surface of the blocking portion 142 onto the substrate 110. In other words, the cross-sectional shape of the blocking portion 142 on a section perpendicular to the plane of the display panel 100 can be trapezoidal or rectangular. The blocking portions 142 with the above-described shapes can all form a stepped structure between the bottom surface of the blocking portion 142 and the top surface of the isolator 141, so that the light-emitting material layers formed in different sub-pixel regions during evaporation are isolated from each other.

[0072] In some embodiments, the partition structure 140 may further include a support portion 143, which is located on the side of the insulator 141 near the substrate 110. The bottom surface of the insulator 141 is projected onto the substrate 110, and the top surface of the support portion 143 is projected onto the substrate 110. The support portion 143 includes a conductive material, and the second electrode portion 151 is electrically connected to the support portion 143. That is, the size of the top surface of the support portion 143 is larger than the size of the bottom surface of the insulator 141. Since the partition structure 140 is also provided with the support portion 143, the second electrode portion 151 can climb onto the support portion 143 and then further overlap with the insulator 141. This reduces the climbing angle of the second electrode portion 151, thereby improving the overlap stability between the second electrode portion 151 and the insulator 141. In addition, the carrier portion 143 also includes a conductive material, and the second electrode portion 151 is also electrically connected to the carrier portion 143. In this way, even if there is a problem of loose connection between the second electrode portion 151 and the isolator 141, the electrical connection between the second electrode portion 151 and the isolation structure 140 can still be guaranteed. This can further prevent electrical connection failure and improve the performance stability of the display panel 100.

[0073] In some embodiments, the display panel 100 further includes a pixel definition layer 160, which is disposed on the side of the first electrode layer 120 facing away from the substrate 110. The pixel definition layer 160 has a plurality of pixel definition openings 161, the orthographic projection of the pixel definition openings 161 on the substrate 110 overlapping with the orthographic projection of the first electrode portion 121 on the substrate 110, and at least a portion of the light-emitting functional portion 131 is located within the pixel definition openings 161. The pixel definition openings 161 are used to expose the first electrode portion 121 so that at least a portion of the light-emitting functional portion 131 is disposed on the first electrode portion 121 through the pixel definition openings 161. In addition, a partition structure 140 may be disposed on the pixel definition layer 160 to isolate the light-emitting functional portion 131 and the second electrode portion 151.

[0074] An embodiment of the second aspect of this application provides a display device 10, such as... Figure 1 As shown, the display device 10 includes the display panel 100 in any of the embodiments of the first aspect described above. The display device 10 can be, for example, any product or component with display functionality, such as a monitor, television, digital camera, mobile phone, tablet computer, or navigator.

[0075] The display device 10 in this embodiment includes a display panel 100 comprising a first encapsulation layer 170 and a second encapsulation layer 180. The first encapsulation layer 170 includes a plurality of spaced-apart encapsulation portions 171, each corresponding to a light-emitting functional portion 131, and the encapsulation portion 171 encapsulates the corresponding light-emitting functional portion 131. The refractive index of the encapsulation portion 171 is not equal to that of the second encapsulation layer 180, so that the interface 200 between the encapsulation portion 171 and the second encapsulation layer 180 forms a light-converging unit. Thus, a corresponding light-converging unit with light extraction function is formed on the light-emitting side of each light-emitting functional portion 131. In other words, by utilizing the high and low refractive index difference between the encapsulation portion 171 and the second encapsulation layer 180, a large number of light-converging units distributed in the display panel 100 are constructed, thereby improving the light extraction efficiency of the display panel 100.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: substrate; A first electrode layer is disposed on one side of the substrate, and the first electrode layer includes first electrode portions disposed at intervals. A light-emitting functional layer is disposed on the side of the first electrode layer away from the substrate. The light-emitting functional layer includes light-emitting functional parts disposed at intervals, and the light-emitting functional parts are disposed on the side of the first electrode part away from the substrate. A partition structure is located between adjacent light-emitting functional parts; A first encapsulation layer and a second encapsulation layer, wherein the second encapsulation layer is disposed on the side of the first encapsulation layer away from the substrate, the first encapsulation layer includes encapsulation portions disposed at intervals, the encapsulation portions being used to encapsulate the light-emitting functional portion, the refractive index of the encapsulation portions being different from the refractive index of the second encapsulation layer, so that the interface between the encapsulation portions and the second encapsulation layer forms a light converging unit; The interface includes a convex contact surface and a concave contact surface that fit together. In the encapsulation portion and the second encapsulation layer, the refractive index of the one having the convex contact surface is greater than the refractive index of the one having the concave contact surface. The convex contact surface is disposed near the top surface of the partition structure. The plane containing the convex contact surface and the top surface of the partition structure together defines the convex structure. The convex contact surface includes an inclined surface near the top surface of the partition structure, and the inclined surface is connected to the edge of the top surface of the partition structure.

2. The display panel according to claim 1, characterized in that, The first encapsulation layer is an inorganic film layer, and the second encapsulation layer is an organic film layer.

3. The display panel according to claim 2, characterized in that, The convex contact surface is disposed on the encapsulation portion, the concave contact surface is disposed on the second encapsulation layer, and the refractive index of the encapsulation portion is greater than the refractive index of the second encapsulation layer.

4. The display panel according to claim 2, characterized in that, The refractive index of the encapsulation portion is 1.6 to 2.0, and the refractive index of the second encapsulation layer is 1.4 to 1.

6.

5. The display panel according to claim 3, characterized in that, The partition structure defines a first opening, the encapsulation part is configured to encapsulate the first opening, and the light-emitting functional part is disposed within the first opening; the distance from any point on the convex contact surface to the substrate is greater than or equal to the distance from the top surface of the partition structure to the substrate.

6. The display panel according to claim 3, characterized in that, The cross-sectional shape of the protruding structure on a section perpendicular to the plane of the display panel is trapezoidal, rectangular, or arc-shaped.

7. The display panel according to claim 2, characterized in that, The convex contact surface is disposed on the second encapsulation layer, and the concave contact surface is disposed on the encapsulation portion. The refractive index of the second encapsulation layer is greater than the refractive index of the encapsulation portion.

8. The display panel according to claim 2, characterized in that, The refractive index of the encapsulation portion is 1.4 to 1.6, and the refractive index of the second encapsulation layer is 1.6 to 2.

0.

9. The display panel according to claim 2, characterized in that, The partition structure defines a first opening, the encapsulation part is configured to encapsulate the first opening, and the light-emitting functional part is disposed within the first opening; the distance from any point on the convex contact surface to the substrate is less than or equal to the distance from the top surface of the partition structure to the substrate.

10. The display panel according to claim 2, characterized in that, The cross-sectional shape of the protruding structure on a section perpendicular to the plane of the display panel is trapezoidal, rectangular, or arc-shaped.

11. The display panel according to claim 1, characterized in that, The display panel also includes: A second electrode layer is disposed on the side of the light-emitting functional layer opposite to the substrate. The second electrode layer includes second electrode portions disposed at intervals on the side of the light-emitting functional layer opposite to the substrate. The encapsulation portion is also used to encapsulate the second electrode portions. The partition structure includes a conductive material, and the second electrode portions are electrically connected to the conductive material.

12. The display panel according to claim 11, characterized in that, The partition structure includes an isolator and a blocking portion. The blocking portion is located on the side of the isolator away from the substrate. The top surface of the isolator is projected onto the substrate, and the bottom surface of the blocking portion is projected onto the substrate. The isolator includes the conductive material.

13. The display panel according to claim 12, characterized in that, The top surface of the isolator is projected onto the substrate in a manner that is within the projection of the bottom surface of the isolator onto the substrate, or the projection of the top surface of the isolator onto the substrate coincides with the projection of the bottom surface of the isolator onto the substrate.

14. The display panel according to claim 12, characterized in that, The top surface of the blocking portion is projected onto the substrate in a way that the bottom surface of the blocking portion is projected onto the substrate in a way that the ...

15. The display panel according to claim 12, characterized in that, The partition structure further includes a support portion located on the side of the isolator close to the substrate; the bottom surface of the isolator is projected onto the substrate in the orthographic projection of the top surface of the support portion onto the substrate; the support portion includes a conductive material, and the second electrode portion is electrically connected to the support portion.

16. The display panel according to claim 1, characterized in that, The display panel also includes: A pixel definition layer is disposed on the side of the first electrode layer opposite to the substrate. The pixel definition layer has a plurality of pixel definition openings. The orthographic projection of the pixel definition openings on the substrate overlaps with the orthographic projection of the first electrode portion on the substrate. At least a portion of the light-emitting functional portion is located within the pixel definition openings.

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

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