Display panel, display device and preparation method of display panel

Abstract

The application provides a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, a first electrode layer, a light-emitting functional layer, a second electrode layer and an auxiliary electrode layer. The first electrode layer is arranged on one side of the substrate, and comprises a plurality of first electrodes arranged at intervals. The light-emitting functional layer is arranged on the side, away from the substrate, of the first electrode layer, and comprises a plurality of light-emitting structures arranged at intervals. The second electrode layer is arranged on the side, away from the substrate, of the light-emitting functional layer, and comprises a second electrode. The second electrode covers the projections of the plurality of light-emitting structures on the substrate in the orthographic projection of the substrate. The auxiliary electrode layer is arranged on the side, away from the substrate, of the second electrode layer, and comprises an auxiliary electrode. The auxiliary electrode is electrically connected to the second electrode and comprises a first electrode part in contact with the second electrode. The projection of the first electrode part on the substrate is located outside the projection of the light-emitting structure on the substrate.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display panels and display panels using light-emitting diode (LED) devices are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body and wide range of applications, becoming the mainstream of display devices. Summary of the Invention

[0003] This application provides a display panel, a display device, and a method for manufacturing the display panel, which can improve the bulging problem.

[0004] In a first aspect, embodiments of this application provide a display panel, including:

[0005] substrate;

[0006] A first electrode layer is disposed on one side of a substrate, and the first electrode layer includes a plurality of first electrodes disposed at intervals.

[0007] 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 a plurality of light-emitting structures disposed at intervals. The orthographic projection of the plurality of light-emitting structures on the substrate and the orthographic projection of the plurality of first electrodes on the substrate overlap accordingly.

[0008] The second electrode layer is disposed on the side of the light-emitting functional layer away from the substrate. The second electrode layer includes a second electrode, and the orthogonal projection of the second electrode on the substrate covers the orthogonal projection of multiple light-emitting structures on the substrate.

[0009] An auxiliary electrode layer is disposed on the side of the second electrode layer away from the substrate. The auxiliary electrode layer includes an auxiliary electrode, which is electrically connected to the second electrode and includes a first electrode portion that contacts the second electrode.

[0010] In this case, the orthogonal projection of the first electrode portion onto the substrate is located outside the orthogonal projection of the light-emitting structure onto the substrate.

[0011] In some embodiments, a functional film layer is further provided on the side of the second electrode layer away from the substrate. The functional film layer includes a plurality of functional parts arranged at intervals, and the orthographic projection of the plurality of functional parts on the substrate overlaps with the orthographic projection of different light-emitting structures on the substrate.

[0012] Adjacent functional parts are spaced apart to form a gap space, and the first electrode part is located within the gap space.

[0013] In some embodiments, the auxiliary electrode further includes a second electrode portion integrally connected to the first electrode portion, wherein the orthographic projection of the second electrode portion on the substrate overlaps with the orthographic projection of the light-emitting structure on the substrate, and the second electrode portion is located on the side of the functional portion away from the substrate.

[0014] In some embodiments, the auxiliary electrode layer is formed by a sputtering process;

[0015] In some embodiments, the orthographic projections of multiple functional units on the substrate correspond one-to-one with the orthographic projections of multiple light-emitting structures on the substrate.

[0016] In some embodiments, the functional membrane layer includes at least two membrane layer structures stacked together.

[0017] In some embodiments, the functional film layer includes a light extraction layer, and the functional part includes a light extraction part located within the light extraction layer;

[0018] The plurality of light extraction portions are spaced apart, and the orthographic projection of the first electrode portion onto the substrate is located between the orthographic projections of adjacent light extraction portions onto the substrate.

[0019] In some embodiments, the functional film layer further includes a protective layer disposed on the side of the light extraction layer away from the substrate, and the functional portion includes a protective portion located within the protective layer;

[0020] Among them, multiple protective parts are arranged at intervals, and the orthographic projection of the first electrode part on the substrate is located between the orthographic projections of adjacent protective parts on the substrate.

[0021] In some embodiments, the refractive index of the light extraction layer is greater than the refractive index of the protective layer.

[0022] In some embodiments, the material of the protective layer includes lithium fluoride;

[0023] In some embodiments, the light extraction layer is disposed in contact with the second electrode layer.

[0024] In some embodiments, the plurality of light-emitting structures include a first light-emitting structure and a second light-emitting structure that emit different colors, and the plurality of functional parts include a first functional part and a second functional part that are spaced apart from each other. The orthographic projection of the first functional part on the substrate overlaps with the orthographic projection of the first light-emitting structure on the substrate, and the orthographic projection of the second functional part on the substrate overlaps with the orthographic projection of the second light-emitting structure on the substrate.

[0025] The thickness of the first functional part is greater than the thickness of the second functional part;

[0026] In some embodiments, the thickness of the light extraction portion in the first functional unit is greater than the thickness of the light extraction portion in the second functional unit;

[0027] In some embodiments, the first light-emitting structure is used to emit red or blue light, and the second light-emitting structure is used to emit green light.

[0028] In some embodiments, the orthographic projection of a single functional unit onto the substrate overlaps with the orthographic projection of multiple light-emitting structures onto the substrate.

[0029] In some embodiments, multiple adjacent light-emitting structures together constitute a pixel unit, multiple pixel units are repeatedly arranged, and the orthographic projections of multiple functional parts on the substrate overlap with the orthographic projections of different pixel units on the substrate.

[0030] In some embodiments, a plurality of pixel units are repeatedly arranged in a first direction and a second direction, both of which are parallel to the plane of the substrate and intersect each other;

[0031] In the first direction, the spacing between different adjacent functional parts remains the same; and / or, in the second direction, the spacing between different adjacent functional parts remains the same.

[0032] In some embodiments, an encapsulation functional layer is further provided on the side of the auxiliary electrode layer away from the substrate, wherein the orthogonal projection of the encapsulation functional layer on the substrate covers the light-emitting structure and the orthogonal projection of the first electrode portion on the substrate.

[0033] In some embodiments, the auxiliary electrode further includes a second electrode portion integrally connected to the first electrode portion, wherein the orthographic projection of the second electrode portion on the substrate overlaps with the orthographic projection of the light-emitting structure on the substrate, and the second electrode portion is located on the side of the functional portion away from the substrate.

[0034] The surface of the first electrode portion that is away from the substrate is located on the side of the surface of the second electrode portion that is away from the substrate and faces the substrate.

[0035] In some embodiments, the encapsulation functional layer includes a first inorganic layer, a second inorganic layer, and an organic encapsulation layer located between the first inorganic layer and the second inorganic layer, which are stacked together.

[0036] The organic encapsulation layer covers the light-emitting structure and the first electrode portion in the orthogonal projection onto the substrate.

[0037] Secondly, embodiments of this application provide a display panel, including:

[0038] substrate;

[0039] A first electrode layer is disposed on one side of a substrate, and the first electrode layer includes a plurality of first electrodes disposed at intervals.

[0040] 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 a plurality of light-emitting structures disposed at intervals. The orthographic projection of the plurality of light-emitting structures on the substrate and the orthographic projection of the plurality of first electrodes on the substrate overlap accordingly.

[0041] The second electrode layer is disposed on the side of the light-emitting functional layer away from the substrate. The second electrode layer includes a second electrode, and the orthogonal projection of the second electrode on the substrate covers the orthogonal projection of multiple light-emitting structures on the substrate.

[0042] A functional film layer is disposed on the side of the second electrode layer away from the substrate. The functional film layer includes a plurality of functional parts disposed at intervals. The orthographic projection of the plurality of functional parts on the substrate overlaps with the orthographic projection of different light-emitting structures on the substrate, and adjacent functional parts are spaced apart to form gap spaces.

[0043] An auxiliary electrode layer, comprising an auxiliary electrode, wherein the auxiliary electrode is at least partially located within the gap space and is electrically connected to the second electrode.

[0044] Thirdly, embodiments of this application provide a display device, including the display panel in any of the foregoing embodiments.

[0045] Fourthly, embodiments of this application provide a method for manufacturing a display panel, comprising:

[0046] A light-emitting functional layer is formed on one side of the substrate, and the light-emitting functional layer includes a plurality of light-emitting structures arranged at intervals.

[0047] A second electrode layer is formed on the side of the light-emitting functional layer away from the substrate. The second electrode layer includes a second electrode, and the orthogonal projection of the second electrode onto the substrate covers the orthogonal projection of multiple light-emitting structures onto the substrate.

[0048] An auxiliary electrode layer is formed on the side of the second electrode layer away from the substrate. The auxiliary electrode layer includes a first electrode portion that is in contact with and electrically connected to the second electrode. The orthogonal projection of the first electrode portion onto the substrate is located outside the orthogonal projection of the light-emitting structure onto the substrate.

[0049] In some embodiments, the step of forming an auxiliary electrode layer on the side of the second electrode layer away from the substrate includes:

[0050] A functional film layer is formed on the side of the second electrode layer away from the substrate. The functional film layer includes a plurality of functional parts spaced apart. The orthographic projection of the plurality of functional parts on the substrate overlaps with the orthographic projection of different light-emitting structures on the substrate.

[0051] An auxiliary electrode layer is formed on the side of the functional film layer away from the substrate, and the first electrode portion is located between adjacent functional portions;

[0052] In some embodiments, in the step of forming an auxiliary electrode layer on the side of the functional film layer away from the substrate, the auxiliary electrode layer is formed by a sputtering process.

[0053] In some embodiments, after the step of forming an auxiliary electrode layer on the side of the second electrode layer facing away from the substrate, the method includes:

[0054] An encapsulation functional layer is formed on the side of the auxiliary electrode layer away from the substrate. The orthogonal projection of the encapsulation functional layer onto the substrate covers the light-emitting structure and the orthogonal projection of the first electrode portion onto the substrate.

[0055] This application provides a display panel, a display device, and a method for manufacturing the display panel. By adding an auxiliary electrode layer within the display panel, the resistance in the second electrode is reduced through the electrical connection between the auxiliary electrode and the second electrode, thus reducing local current concentration and improving the display uniformity and visual appeal. Furthermore, this application also adjusts the morphology of the first electrode portion in the auxiliary electrode that contacts the second electrode, ensuring that its projection onto the substrate is outside the projection of the light-emitting structure onto the substrate. This reduces damage to the light-emitting device during manufacturing and improves the reliability of the light-emitting device. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0058] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0059] Figure 3 This is a test result diagram provided in an embodiment of this application;

[0060] Figure 4 This is another test result diagram provided in the embodiments of this application;

[0061] Figure 5 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0062] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure at point BB;

[0063] Figure 7 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0064] Figure 8This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0065] Figure 9 yes Figure 8 Schematic diagram of the cross-sectional structure at point CC;

[0066] Figure 10 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0067] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0068] Figure 12 This is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0069] Figures 13a to 13c This is a schematic diagram of the process structure of a method for manufacturing a display panel according to an embodiment of this application;

[0070] Figure 14 This is a flowchart illustrating another method for manufacturing a display panel according to an embodiment of this application;

[0071] Figures 15a to 15b This is a schematic diagram of the process structure of another method for manufacturing a display panel provided in this application embodiment;

[0072] Figure 16 This is a flowchart illustrating another method for manufacturing a display panel according to an embodiment of this application;

[0073] Figure 17 This is a schematic diagram of the process structure of another method for manufacturing a display panel provided in this application embodiment.

[0074] Marker explanation:

[0075] 10. Substrate;

[0076] 20. First electrode layer; 21. First electrode;

[0077] 30. Light-emitting functional layer; 31. Light-emitting structure; 31a. First light-emitting structure; 31b. Second light-emitting structure; 32. Pixel unit;

[0078] 40. Second electrode layer; 41. Second electrode;

[0079] 50. Auxiliary electrode layer; 51. Auxiliary electrode; 52. First electrode section; 53. Second electrode section;

[0080] 60. Functional film layer; 61. Functional part; 61a. First functional part; 61b. Second functional part; 62. Gap space;

[0081] 70. Optical extraction layer; 71. Optical extraction section;

[0082] 80. Protective layer; 81. Protective section;

[0083] 90. Encapsulation functional layer; 91. First inorganic layer; 92. Second inorganic layer; 93. Organic encapsulation layer;

[0084] X, first direction; Y, second direction; Z, thickness direction. Detailed Implementation

[0085] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0087] Organic light-emitting diode (OLED) display panels contain a stacked anode, light-emitting material, and cathode. Light emitted from the cathode is emitted from the cathode side. To improve light extraction efficiency, the cathode is typically thinned. While cathode thinning helps improve transmittance, it also leads to a simultaneous increase in resistance. This is especially problematic for large-size display panels, where the cathode potential can differ between the edges and center of the display area, resulting in poor brightness uniformity.

[0088] Regarding the above issues, firstly, please refer to [link / reference needed]. Figure 1 and Figure 2This application provides a display panel, which includes a substrate 10, a first electrode layer 20, a light-emitting functional layer 30, a second electrode layer 40, and an auxiliary electrode layer 50. The first electrode layer 20 is disposed on one side of the substrate 10 and includes a plurality of first electrodes 21 spaced apart. The light-emitting functional layer 30 is disposed on the side of the first electrode layer 20 opposite to the substrate 10 and includes a plurality of light-emitting structures 31 spaced apart. The orthographic projections of the plurality of light-emitting structures 31 onto the substrate 10 correspond to and overlap with the orthographic projections of the plurality of first electrodes 21 onto the substrate 10.

[0089] The second electrode layer 40 is disposed on the side of the light-emitting functional layer 30 facing away from the substrate 10. The second electrode layer 40 includes a second electrode 41, and the orthographic projection of the second electrode 41 onto the substrate 10 covers the orthographic projection of the plurality of light-emitting structures 31 onto the substrate 10. The auxiliary electrode layer 50 is disposed on the side of the second electrode layer 40 facing away from the substrate 10. The auxiliary electrode layer 50 includes an auxiliary electrode 51, which is electrically connected to the second electrode 41 and includes a first electrode portion 52 in contact with the second electrode 41. The orthographic projection of the first electrode portion 52 onto the substrate 10 is located outside the orthographic projection of the light-emitting structures 31 onto the substrate 10.

[0090] The substrate 10 primarily serves a supporting and load-bearing function. Other film layers are sequentially stacked on the substrate 10. This stacking refers to the sequential arrangement of the other film layers along the thickness direction Z of the substrate 10. The substrate 10 may include multiple film layer structures. The specific composition of the film layer structures is not limited in this embodiment. Furthermore, the thickness direction Z of other film layers located on one side of the substrate 10 is generally consistent with the thickness direction Z of the substrate 10 itself. Therefore, for ease of description, the thickness direction Z of the substrate 10 or other film layers mentioned later in this embodiment will be shown in the same direction.

[0091] The first electrode layer 20, the light-emitting functional layer 30, the second electrode layer 40, and the auxiliary electrode layer 50 are all disposed on the same side of the substrate 10 in the thickness direction Z. The light-emitting functional layer 30 is the main film layer structure for realizing the light-emitting function. The light-emitting functional layer 30 includes multiple light-emitting structures 31. The embodiments of this application do not limit the types and number of light-emitting structures 31. Exemplarily, the multiple light-emitting structures 31 include, but are not limited to, a red light-emitting structure 31 for emitting red light, a green light-emitting structure 31 for emitting green light, and a blue light-emitting structure 31 for emitting blue light.

[0092] The first electrode layer 20 and the second electrode layer 40 are disposed on opposite sides of the light-emitting functional layer 30 along the thickness direction Z. The first electrode layer 20 includes a first electrode 21, and the first electrode 21 and the light-emitting structure 31 can have a one-to-one correspondence, that is, the orthographic projection of a single first electrode 21 on the substrate 10 overlaps only with the orthographic projection of a single light-emitting structure 31 on the substrate 10. The second electrode layer 40 includes a second electrode 41, which, unlike the first electrode 21, can cover the orthographic projection of all light-emitting structures 31 on the substrate 10. The light-emitting structure 31, the first electrode 21 corresponding to the light-emitting structure 31, and the portion of the second electrode 41 corresponding to the light-emitting structure 31 can together form a light-emitting device to achieve a light-emitting display effect. For example, the first electrode 21 is the anode, and the second electrode 41 is the cathode.

[0093] The auxiliary electrode layer 50 is an auxiliary film layer used to reduce the resistance value corresponding to the second electrode layer 40. The auxiliary electrode layer 50 includes an auxiliary electrode 51, and the first electrode portion 52 of the auxiliary electrode 51 can be directly contacted with the second electrode 41. The auxiliary electrode 51 achieves electrical connection with the second electrode 41 through the first electrode portion 52. In this way, by means of the parallel connection between the auxiliary electrode 51 and the second electrode 41, the current can flow through multiple paths instead of being concentrated on the second electrode 41, thereby effectively dispersing the current, reducing the local concentration of current, and thus reducing the overall resistance value.

[0094] The first electrode portion 52 is a structure in the auxiliary electrode layer 50 that is in direct contact with the second electrode 41. If the first electrode portion 52 is a whole-surface structure, the fabrication process of the first electrode portion 52 is prone to damage to the second electrode 41 and other structures in the light-emitting device, thereby generating leakage current and easily causing problems such as reduced luminous efficiency at low brightness.

[0095] Therefore, the morphology of the first electrode portion 52 has been adjusted in this embodiment. The first electrode portion 52 is not a full-surface structure, and its orthographic projection on the substrate 10 is outside the orthographic projection of the light-emitting structure 31 on the substrate 10. Based on this, if the second electrode 41 is damaged during the fabrication of the first electrode portion 52, only the structure between adjacent light-emitting devices is damaged, while the damage to the light-emitting devices is relatively small. This reduces the resistance corresponding to the second electrode 41 while minimizing the impact on the performance of the light-emitting devices.

[0096] It should be noted that the auxiliary electrode 51 in the auxiliary electrode layer 50 may only include the first electrode portion 52. For example, the first electrode portion 52 can be patterned using a mask with a specific morphology so that the orthographic projection of the first electrode portion 52 on the substrate 10 is outside the orthographic projection of the light-emitting structure 31 on the substrate 10. Alternatively, in some embodiments, the auxiliary electrode 51 in the auxiliary electrode layer 50 may include other structures besides the first electrode portion 52. In this case, the orthographic projection of the other structures in the auxiliary electrode 51 besides the first electrode portion 52 on the substrate 10 may overlap with the orthographic projection of the second electrode 41 on the substrate 10, as long as there are other film layers between the other structures and the second electrode 41 to reduce the damage to the light-emitting device during the fabrication of the other structures.

[0097] In summary, in this embodiment, by adding an auxiliary electrode layer 50 within the display panel, the resistance in the second electrode 41 is reduced by utilizing the electrical connection between the auxiliary electrode 51 and the second electrode 41, thereby reducing local current concentration and improving the display uniformity and visual appeal of the display panel. Furthermore, this embodiment also adjusts the morphology of the first electrode portion 52 in the auxiliary electrode 51 that contacts the second electrode 41, so that its orthographic projection on the substrate 10 is outside the orthographic projection of the light-emitting structure 31 on the substrate 10, thereby reducing damage to the light-emitting device during its fabrication and improving the performance reliability of the light-emitting device.

[0098] Furthermore, Figure 3 and Figure 4 For the test results corresponding to the solution provided in the embodiments of this application, in the figure, curve 1 represents the test curve result of the light-emitting device in the display panel provided in the embodiments of this application, and curve 2 represents the test curve result of the light-emitting device in the display panel when the first electrode part 52 has a full-surface structure.

[0099] exist Figure 3 The horizontal axis represents the voltage magnitude, and the vertical axis represents the current density magnitude. By observing the graph, it can be seen that under low voltage, the current density corresponding to curve 1 is less than the current density corresponding to curve 2. In other words, the leakage current of the light-emitting device corresponding to curve 1 is less than the leakage current of the light-emitting device corresponding to curve 2. The display panel provided in this application embodiment can reduce leakage current and improve luminous efficiency under low voltage.

[0100] exist Figure 4 The horizontal axis represents the brightness level, and the vertical axis represents the current efficiency level. By observing the graph, it can be seen that under low brightness conditions, the current efficiency corresponding to curve 1 is greater than that corresponding to curve 2. Therefore, the grayscale display effect of the light-emitting device corresponding to curve 1 is better than that of the light-emitting device corresponding to curve 2. The display panel provided in this application embodiment helps to improve the actual display effect.

[0101] In some embodiments, please refer to Figure 5 and Figure 6 The display panel also includes a functional film layer 60 disposed on the side of the second electrode layer 40 facing away from the substrate 10. The functional film layer 60 includes a plurality of functional parts 61 disposed at intervals. The orthographic projection of the plurality of functional parts 61 onto the substrate 10 overlaps with the orthographic projection of different light-emitting structures 31 onto the substrate 10. Adjacent functional parts 61 are spaced apart to form a gap space 62, and the first electrode part 52 is located within the gap space 62.

[0102] The functional film layer 60 is a film layer structure in the display panel used to achieve specific functions. For example, the functional film layer 60 can be used to improve light extraction efficiency, or it can be used to reduce the reflection of ambient light, or it can be used to adjust the light extraction viewing angle. Depending on the actual needs, the functional film layer 60 may consist of only a single film layer, or it may include multiple stacked film layer structures. This application embodiment does not limit this.

[0103] In this embodiment, in addition to achieving the specific functions mentioned above, the functional film layer 60 also assists in the fabrication of the auxiliary electrode layer 50. The functional film layer 60 is not a full-surface structure; it includes multiple functional parts 61 corresponding to multiple light-emitting structures 31. Different functional parts 61 are spaced apart to form gap spaces 62. During the fabrication process, the functional film layer 60 is formed before the auxiliary electrode layer 50. Therefore, during the fabrication of the auxiliary electrode 51, only the electrode material falling into the gap space 62 can be used to form the first electrode part 52 that contacts the second electrode 41. Thus, the functional film layer 60 ensures that the first electrode part 52 is not a full-surface structure, and that the orthographic projection of the first electrode part 52 on the substrate 10 is outside the orthographic projection of the light-emitting structure 31 on the substrate 10. This reduces the resistance corresponding to the second electrode 41 while minimizing the impact of the fabrication of the first electrode part 52 on the performance of the light-emitting device.

[0104] It should be noted that, due to the presence of the functional film layer 60, even if the auxiliary electrode 51 has a full-surface structure, the portion of the auxiliary electrode 51 corresponding to the light-emitting structure 31 can be spaced apart from the second electrode 41 by the functional portion 61, thereby reducing the impact of this portion of the structure on the performance of the light-emitting device. Furthermore, due to the presence of the functional film layer 60, the first electrode portion 52 can have a grid-like structure in its orthogonal projection onto the substrate 10.

[0105] Therefore, in some embodiments, such as Figure 5 and Figure 6As shown, the auxiliary electrode 51 also includes a second electrode 53 that is integrally connected to the first electrode 52. The orthographic projection of the second electrode 53 on the substrate 10 overlaps with the orthographic projection of the light-emitting structure 31 on the substrate 10, and the second electrode 53 is located on the side of the functional part 61 away from the substrate 10.

[0106] The first electrode portion 52 and the second electrode portion 53 are made of the same material and formed together in the same process. Unlike the first electrode portion 52, the second electrode portion 53 overlaps with the orthographic projection of the light-emitting structure 31 on the substrate 10 in the orthographic projection of the substrate 10. However, due to the presence of the functional portion 61, the second electrode portion 53 and the second electrode 41 can be spaced apart in the thickness direction Z, thereby reducing the impact of the fabrication of the second electrode portion 53 on the performance of the light-emitting device. Furthermore, with this design, the auxiliary electrode 51 can have a full-surface structure, thereby eliminating the need for a fine metal mask in the fabrication process of the auxiliary electrode 51 and reducing fabrication costs. Optionally, the auxiliary electrode layer 50 is formed by a sputtering process.

[0107] Of course, in other embodiments, the auxiliary electrode 51 may be selected to include only the first electrode portion 52 disposed in the gap space 62, rather than being a whole surface structure, which helps to reduce the overall thickness of the display panel and facilitates a thinner and lighter design.

[0108] Furthermore, the embodiments of this application do not limit the relationship between a single functional unit 61 and the light-emitting structure 31. For example, the orthographic projection of a single functional unit 61 on the substrate 10 may overlap only with the orthographic projection of a single light-emitting structure 31 on the substrate 10, or the orthographic projection of a single functional unit 61 on the substrate 10 may simultaneously overlap with the orthographic projections of multiple light-emitting structures 31 on the substrate 10. Optionally, the orthographic projections of multiple functional units 61 on the substrate 10 and the orthographic projections of multiple light-emitting structures 31 on the substrate 10 are arranged in a one-to-one correspondence, that is, the orthographic projection of a single functional unit 61 on the substrate 10 overlaps only with the orthographic projection of a single light-emitting structure 31 on the substrate 10.

[0109] In some embodiments, the functional membrane layer 60 includes at least two membrane layer structures stacked together.

[0110] In this embodiment, by providing the functional film layer 60 with multiple film layer structures, the size of the gap space 62 in the thickness direction Z is increased, so that more electrode material can fall into the gap space 62 to form the first electrode portion 52, thereby helping to reduce the parallel resistance between the auxiliary electrode 51 and the second electrode 41, and further improving the display uniformity of the display panel.

[0111] In some embodiments, such as Figure 5 and Figure 6As shown, the functional film layer 60 includes a light extraction layer 70, and the functional part 61 includes a light extraction part 71 located within the light extraction layer 70. Multiple light extraction parts 71 are spaced apart, and the orthographic projection of the first electrode part 52 onto the substrate 10 is located between the orthographic projections of adjacent light extraction parts 71 onto the substrate 10.

[0112] The light extraction layer 70 is disposed on the light-emitting side of the light-emitting functional layer 30. The light extraction layer 70 helps to reduce light loss and lower the power consumption of the display panel. In related technologies, the light extraction film layer is often a full-surface structure, that is, the orthogonal projection of the light extraction film layer covers the orthogonal projection of all light-emitting devices.

[0113] However, in this embodiment, the light extraction layer 70 is not a full-surface structure. The functional part 61 includes a light extraction part 71 located within the light extraction layer 70. The orthographic projection of a single light extraction part 71 onto the substrate 10 can overlap with the orthographic projection of one or more light-emitting structures 31 onto the substrate 10, thereby meeting the light emission power consumption requirements of the display panel. Furthermore, the multiple light extraction parts 71 are spaced apart from each other, so that the first electrode part 52 can be located between at least some of the adjacent light extraction parts 71, thereby meeting the requirement of misaligned distribution of the first electrode part 52 and the orthographic projection of the light-emitting structure 31 onto the substrate 10, and reducing the impact of the fabrication process of the first electrode part 52 on the performance of the light-emitting device.

[0114] It should be noted that, depending on the actual needs, the functional film layer 60 may only include the light extraction layer 70, or it may include other film layer structures; this embodiment does not impose any limitations on this. Optionally, the light extraction layer 70 is disposed in contact with the second electrode layer 40.

[0115] In some embodiments, such as Figure 5 and Figure 6 As shown, the functional film layer 60 also includes a protective layer 80 disposed on the side of the light extraction layer 70 facing away from the substrate 10, and the functional part 61 includes a protective part 81 located within the protective layer 80. A plurality of protective parts 81 are spaced apart, and the orthographic projection of the first electrode part 52 onto the substrate 10 is located between the orthographic projections of adjacent protective parts 81 onto the substrate 10.

[0116] The protective layer 80 is located on the side of the light extraction layer 70 away from the substrate 10. It can protect the light-emitting device and the light extraction layer 70. In related technologies, the protective film layer is often a whole-surface structure, that is, the orthogonal projection of the protective film layer covers the orthogonal projection of the entire light-emitting device.

[0117] However, in this embodiment, the protective layer 80 is not a full-surface structure. The functional part 61 includes a protective part 81 located within the protective layer 80. The orthographic projection of a single protective part 81 onto the substrate 10 can overlap with the orthographic projection of one or more light-emitting structures 31 onto the substrate 10, thereby meeting the protection requirements for the light-emitting device. Furthermore, multiple protective parts 81 are spaced apart from each other, so that the first electrode part 52 can be located between at least some adjacent protective parts 81, thereby meeting the requirement of misaligned distribution of the orthographic projections of the first electrode part 52 and the light-emitting structure 31 onto the substrate 10, reducing the impact of the fabrication process of the first electrode part 52 on the performance of the light-emitting device.

[0118] It should be noted that the dimensions and shape relationships between the individual protective portion 81 and the individual light extraction portion 71 are not limited in this embodiment. The orthographic projections of the individual protective portion 81 and the individual light extraction portion 71 on the substrate 10 can have the same shape or different shapes. Furthermore, the orthographic projections of the individual protective portion 81 and the individual light extraction portion 71 on the substrate 10 can overlap with the orthographic projections of the same number of light-emitting structures 31 on the substrate 10, or they can overlap with the orthographic projections of different numbers of light-emitting structures 31 on the substrate 10. Optionally, the orthographic projections of the individual light extraction portion 71 on the substrate 10 coincide with the orthographic projections of the individual protective portion 81 on the substrate 10, so that the light extraction layer 70 and the protective layer 80 can be fabricated using the same photomask, thereby reducing manufacturing costs.

[0119] In some embodiments, the refractive index of the light extraction layer 70 is greater than that of the protective layer 80.

[0120] In this embodiment, the light extraction layer 70 improves light extraction efficiency through its higher material refractive index, thereby reducing the power consumption of the display panel. The protective layer 80, in addition to its protective function, can work in conjunction with the light extraction layer 70, utilizing the difference in their material refractive indices to adjust light extraction and improve the display effect of the display panel. Optionally, the material of the protective layer 81 includes lithium fluoride.

[0121] In some embodiments, please refer to Figure 7 The plurality of light-emitting structures 31 include a first light-emitting structure 31a and a second light-emitting structure 31b emitting different colors. The plurality of functional parts 61 include a first functional part 61a and a second functional part 61b spaced apart from each other. The orthographic projection of the first functional part 61a onto the substrate 10 overlaps with the orthographic projection of the first light-emitting structure 31a onto the substrate 10, and the orthographic projection of the second functional part 61b onto the substrate 10 overlaps with the orthographic projection of the second light-emitting structure 31b onto the substrate 10. The thickness of the first functional part 61a is greater than the thickness of the second functional part 61b.

[0122] The first light-emitting structure 31a and the second light-emitting structure 31b are two light-emitting structures 31 with different light-emitting colors. The first functional part 61a and the second functional part 61b are different functional parts 61 in the functional film layer 60 that are respectively provided corresponding to the first light-emitting structure 31a and the second light-emitting structure 31b.

[0123] The first functional part 61a and the second functional part 61b are arranged at intervals. Based on this, some film structures in the first functional part 61a and the second functional part 61b can be formed in two separate processes instead of being formed together in the same process. This results in some film structures in the first functional part 61a and the second functional part 61b having different thicknesses.

[0124] In this embodiment, by changing the thickness of some film layers in the first functional part 61a and the second functional part 61b, the thickness of the first functional part 61a is made greater than the thickness of the second functional part 61b. In this way, the first functional part 61a and the second functional part 61b can have different adjustment effects on the first light-emitting structure 31a and the second light-emitting structure 31b, respectively. This achieves adaptive adjustment for different colors of light, thereby enabling the display panel to have higher light emission efficiency and longer service life, improving the performance and reliability of the display panel.

[0125] In some embodiments, the thickness of the light extraction section 71 in the first functional section 61a is greater than the thickness of the light extraction section 71 in the second functional section 61b.

[0126] In this embodiment, the light extraction part 71 in the first functional part 61a and the light extraction part 71 in the second functional part 61b can be fabricated in different processes. Furthermore, for the first light-emitting structure 31a and the second light-emitting structure 31b with different light-emitting colors, this embodiment provides the corresponding light extraction part 71 with different thicknesses to meet the adjustment needs of the light emitted by the first light-emitting structure 31a and the second light-emitting structure 31b, thereby improving the display effect.

[0127] In some embodiments, the first light-emitting structure 31a is used to emit red light or blue light, and the second light-emitting structure 31b is used to emit green light.

[0128] In related technologies, taking a display panel with red, green, and blue subpixels as an example, the subpixel used to emit green light contributes approximately 70% to the brightness of the display panel, while accounting for nearly 25% of the power consumption. The subpixel used to emit red light contributes approximately 20% to the brightness of the display panel, while accounting for nearly 25% of the power consumption. The subpixel used to emit blue light contributes approximately 10% to the brightness of the display panel, while accounting for nearly 50% of the power consumption.

[0129] Based on this, the embodiment of this application appropriately increases the thickness of the first functional part 61a corresponding to the first light-emitting structure 31a, making it greater than the thickness of the second functional part 61b corresponding to the second light-emitting structure 31b, thereby helping to improve the front light emission efficiency corresponding to red light or blue light, thereby improving the display effect under the front viewing angle and helping to reduce power consumption loss.

[0130] In some embodiments, please refer to Figure 8 and Figure 9 The orthographic projection of a single functional unit 61 onto the substrate 10 overlaps with the orthographic projection of multiple light-emitting structures 31 onto the substrate 10.

[0131] In this embodiment, the light rays of the multiple functional parts 61 and the multiple light-emitting structures 31 are not one-to-one correspondences. The orthographic projections of a single functional part 61 and the multiple light-emitting structures 31 on the substrate 10 overlap. This design helps to increase the orthographic projection size of a single functional part 61 on the substrate 10, thereby reducing the difficulty of fabricating the functional film layer 60 and improving the yield of the display panel.

[0132] It should be noted that, depending on the pixel arrangement inside the display panel, the orthographic projection of a single functional unit 61 on the substrate 10 can overlap with the orthographic projections of multiple light-emitting structures 31 of the same color on the substrate 10, or the orthographic projection of a single functional unit 61 on the substrate 10 can overlap with the orthographic projections of multiple light-emitting structures 31 of different colors on the substrate 10.

[0133] In some embodiments, such as Figure 8 and Figure 9 As shown, multiple adjacent light-emitting structures 31 together constitute a pixel unit 32, and multiple pixel units 32 are arranged repeatedly. The orthographic projections of multiple functional parts 61 on the substrate 10 overlap with the orthographic projections of different pixel units 32 on the substrate 10.

[0134] A pixel unit 32 is the smallest repeating unit composed of multiple light-emitting structures 31. Multiple pixel units 32 can be arranged in a repeating array along the first direction X and the second direction Y, respectively. Optionally, the first direction X, the second direction Y, and the thickness direction Z are mutually perpendicular. This application embodiment does not limit the number, type, or specific arrangement of the multiple light-emitting structures 31 within a single pixel unit 32. Taking a single pixel unit 32 containing a first light-emitting structure 31a, a second light-emitting structure 31b, and a third light-emitting structure 31 of different colors as an example, the first light-emitting structure 31a, the second light-emitting structure 31b, and the third light-emitting structure 31 can be arranged side-by-side sequentially in the first direction X, or they can be arranged side-by-side sequentially in the second direction Y. Alternatively, the first light-emitting structure 31a and the second light-emitting structure 31b can be arranged side-by-side in the first direction X, and the third light-emitting structure 31 can be arranged side-by-side relative to the first light-emitting structure 31a and the second light-emitting structure 31b in the second direction Y. Optionally, the first light-emitting structure 31a, the second light-emitting structure 31b, and the third light-emitting structure 31 are respectively one of a red light-emitting structure 31, a green light-emitting structure 31, and a blue light-emitting structure 31.

[0135] In this embodiment, different functional units 61 are respectively disposed corresponding to different pixel units 32. Based on this, the orthographic projection of the first electrode portion 52 located between adjacent functional units 61 on the substrate 10 can be located between the orthographic projections of adjacent pixel units 32 on the substrate 10. Considering that the distance between adjacent pixel units 32 is often greater than the distance between adjacent light-emitting structures 31 within a single pixel unit 32, this design helps to increase the width of the first electrode portion 52 at local locations, thereby helping to increase the contact area between the first electrode portion 52 and the second electrode 41, thereby further reducing the resistance and improving the brightness uniformity of the display panel.

[0136] It should be noted that the orthographic projection of a single functional unit 61 on the substrate 10 may overlap only with the orthographic projection of a single pixel unit 32 on the substrate 10, or the orthographic projection of a single functional unit 61 on the substrate 10 may overlap with the orthographic projections of multiple pixel units 32 on the substrate 10 simultaneously. The figure shows the case where the orthographic projection of a single functional unit 61 on the substrate 10 overlaps only with the orthographic projection of a single pixel unit 32 on the substrate 10.

[0137] In some embodiments, a plurality of pixel units 32 are repeatedly arranged in a first direction X and a second direction Y, both of which are parallel to the plane of the substrate 10 and intersect each other. In the first direction X, the spacing between different adjacent functional units 61 remains the same; and / or, in the second direction Y, the spacing between different adjacent functional units 61 remains the same. Optionally, the spacing between different adjacent functional units 61 remains the same in the first direction X; and the spacing between different adjacent functional units 61 remains the same in the second direction Y.

[0138] Taking the example where the orthographic projection of a single functional unit 61 on the substrate 10 overlaps only with the orthographic projection of a single pixel unit 32 on the substrate 10, since adjacent pixel units 32 usually have the same spacing in a single direction, this embodiment matches the positions of multiple functional units 61 with the corresponding pixel units 32, so that adjacent different functional units 61 have the same spacing in a single direction. Based on this, the different structures of the first electrode portion 52 located between different adjacent functional units 61 can have the same width dimension. Under this design, the first electrode portion 52 and the second electrode 41 can have the same contact area in different areas of the display panel, which helps to improve the connection reliability between the auxiliary electrode 51 and the second electrode 41, and further improves the display uniformity of the display panel.

[0139] In some embodiments, please refer to Figure 10 The display panel also includes an encapsulation functional layer 90 disposed on the side of the auxiliary electrode layer 50 away from the substrate 10. The orthogonal projection of the encapsulation functional layer 90 onto the substrate 10 covers the orthogonal projection of the light-emitting structure 31 and the first electrode portion 52 onto the substrate 10.

[0140] The encapsulation functional layer 90 is a functional film layer 60 that plays a role in encapsulation and protection. The encapsulation functional layer 90 may include multiple film layer structures stacked together. For example, the encapsulation functional layer 90 includes a first inorganic layer 91, a second inorganic layer 92, and an organic encapsulation layer 93 located between the first inorganic layer 91 and the second inorganic layer 92.

[0141] In this embodiment, the encapsulation functional layer 90 is located on the side of the auxiliary electrode layer 50 away from the substrate 10, and its orthogonal projection on the substrate 10 covers the orthogonal projection of the light-emitting structure 31 and the first electrode portion 52 on the substrate 10. Based on this, in addition to encapsulating and protecting the light-emitting device, the encapsulation functional layer 90 can also encapsulate and protect the first electrode portion 52, reducing the risk of moisture and other substances entering the first electrode portion 52 and improving the reliability of current transmission between the second electrode 41 and the auxiliary electrode 51.

[0142] In some embodiments, the auxiliary electrode 51 further includes a second electrode portion 53 integrally connected to the first electrode portion 52. The orthographic projection of the second electrode portion 53 onto the substrate 10 overlaps with the orthographic projection of the light-emitting structure 31 onto the substrate 10, and the second electrode portion 53 is located on the side of the functional portion 61 facing away from the substrate 10. The surface of the first electrode portion 52 facing away from the substrate 10 is located on the side of the second electrode portion 53 facing away from the substrate 10.

[0143] The first surface is the surface of the first electrode portion 52 facing away from the substrate 10, and the second surface is the surface of the second electrode portion 53 facing away from the substrate 10. Due to the presence of the functional film layer 60, the first surface is located on the side of the second surface facing the substrate 10. Based on this, in this embodiment, by covering the light-emitting structure 31 and the first electrode portion 52 on the substrate 10 with the orthographic projection of the encapsulation functional layer 90 on the substrate 10, the encapsulation functional layer 90 can not only play a role in encapsulation and protection, but also play a role in leveling. This reduces the adverse effects of the step difference between the first surface and the second surface on the subsequent preparation of other film layers and improves the yield of the display panel.

[0144] In some embodiments, the encapsulation functional layer 90 includes a first inorganic layer 91, a second inorganic layer 92, and an organic encapsulation layer 93 located between the first inorganic layer 91 and the second inorganic layer 92. The orthographic projection of the organic encapsulation layer 93 onto the substrate 10 covers the orthographic projection of the light-emitting structure 31 and the first electrode portion 52 onto the substrate 10.

[0145] Compared to the first inorganic layer 91 and the second inorganic layer 92, the organic encapsulation layer 93 often has a larger thickness. In view of this, in this embodiment, the orthographic projection of the organic encapsulation layer 93 on the substrate 10 covers the orthographic projection of the light-emitting structure 31 and the first electrode portion 52 on the substrate 10. This is achieved by using the organic encapsulation layer 93 to fill the gap, reduce the adverse effects of the step difference between the first surface and the second surface on the subsequent preparation of other film layers, and improve the yield of the display panel.

[0146] Secondly, such as Figure 5 and Figure 6 As shown, this application embodiment provides a display panel, which includes a substrate 10, a first electrode layer 20, a light-emitting functional layer 30, a second electrode layer 40, a functional film layer 60, and an auxiliary electrode layer 50. The first electrode layer 20 is disposed on one side of the substrate 10 and includes a plurality of first electrodes 21 spaced apart. The light-emitting functional layer 30 is disposed on the side of the first electrode layer 20 away from the substrate 10 and includes a plurality of light-emitting structures 31 spaced apart. The orthographic projections of the plurality of light-emitting structures 31 onto the substrate 10 correspond to and overlap with the orthographic projections of the plurality of first electrodes 21 onto the substrate 10.

[0147] The second electrode layer 40 is disposed on the side of the light-emitting functional layer 30 facing away from the substrate 10. The second electrode layer 40 includes a second electrode 41, the orthographic projection of the second electrode 41 onto the substrate 10 overlapping the orthographic projections of multiple light-emitting structures 31 onto the substrate 10. The functional film layer 60 is disposed on the side of the second electrode layer 40 facing away from the substrate 10. The functional film layer 60 includes multiple functional portions 61 spaced apart. The orthographic projections of the multiple functional portions 61 onto the substrate 10 overlap with the orthographic projections of different light-emitting structures 31 onto the substrate 10, and adjacent functional portions 61 are spaced apart to form gap spaces 62. The auxiliary electrode layer 50 includes an auxiliary electrode 51, at least partially located within the gap space 62 and electrically connected to the second electrode 41.

[0148] The substrate 10 primarily serves a supporting and load-bearing function. Other film layers are sequentially stacked on the substrate 10. This stacking refers to the sequential arrangement of the other film layers along the thickness direction Z of the substrate 10. The substrate 10 may include multiple film layer structures. The specific composition of the film layer structures is not limited in this embodiment. Furthermore, the thickness direction Z of other film layers located on one side of the substrate 10 is generally consistent with the thickness direction Z of the substrate 10 itself. Therefore, for ease of description, the thickness direction Z of the substrate 10 or other film layers mentioned later in this embodiment will be shown in the same direction.

[0149] The first electrode layer 20, the light-emitting functional layer 30, the second electrode layer 40, and the auxiliary electrode layer 50 are all disposed on the same side of the substrate 10 in the thickness direction Z. The light-emitting functional layer 30 is the main film layer structure for realizing the light-emitting function. The light-emitting functional layer 30 includes multiple light-emitting structures 31. The embodiments of this application do not limit the types and number of light-emitting structures 31. Exemplarily, the multiple light-emitting structures 31 include, but are not limited to, a red light-emitting structure 31 for emitting red light, a green light-emitting structure 31 for emitting green light, and a blue light-emitting structure 31 for emitting blue light.

[0150] The first electrode layer 20 and the second electrode layer 40 are disposed on opposite sides of the light-emitting functional layer 30 along the thickness direction Z. The first electrode layer 20 includes a first electrode 21, and the first electrode 21 and the light-emitting structure 31 can have a one-to-one correspondence, that is, the orthographic projection of a single first electrode 21 on the substrate 10 overlaps only with the orthographic projection of a single light-emitting structure 31 on the substrate 10. The second electrode layer 40 includes a second electrode 41, which, unlike the first electrode 21, can cover the orthographic projection of all light-emitting structures 31 on the substrate 10. The light-emitting structure 31, the first electrode 21 corresponding to the light-emitting structure 31, and the portion of the second electrode 41 corresponding to the light-emitting structure 31 can together form a light-emitting device to achieve a light-emitting display effect. For example, the first electrode 21 is the anode, and the second electrode 41 is the cathode.

[0151] The functional film layer 60 is a film layer structure in the display panel used to achieve specific functions. For example, the functional film layer 60 can be used to improve light extraction efficiency, or it can be used to reduce the reflection of ambient light, or it can be used to adjust the light extraction viewing angle. Depending on the actual needs, the functional film layer 60 may consist of only a single film layer, or it may include multiple stacked film layer structures. This application embodiment does not limit this.

[0152] The auxiliary electrode layer 50 is an auxiliary film layer used to reduce the resistance value of the second electrode layer 40. Typically, both the auxiliary electrode layer 50 and the functional film layer 60 are full-surface structures, and the auxiliary electrode layer 50 is prepared before the functional film layer 60. Furthermore, the auxiliary electrode 51 in the auxiliary electrode layer 50 is in direct contact with the second electrode 41. This can lead to damage to the light-emitting device during the preparation of the auxiliary electrode 51, resulting in leakage current and causing problems such as decreased luminous efficiency at low brightness.

[0153] In view of this, the morphology and preparation order of the functional film layer 60 and the auxiliary electrode layer 50 have been adjusted in this embodiment. The functional film layer 60 is prepared before the auxiliary electrode layer 50, and the functional film layer 60 is not a whole-surface structure, but includes multiple functional parts 61 corresponding to multiple light-emitting structures 31. Different functional parts 61 are spaced apart to form gap spaces 62. Thus, during the preparation of the auxiliary electrode 51, only the electrode material falling into the gap space 62 can be used to directly contact the second electrode 41. Therefore, the setting of the functional film layer 60 makes at least a part of the structure in the auxiliary electrode 51 that directly contacts the second electrode 41 not a whole-surface structure, but a mesh or other structure. Furthermore, since the gap space 62 is often located outside the orthographic projection of the light-emitting structure 31 onto the substrate 10, the orthographic projection of the part of the auxiliary electrode 51 that directly contacts the second electrode 41 onto the substrate 10 can be located outside the orthographic projection of the light-emitting structure 31 onto the substrate 10. This reduces the resistance corresponding to the second electrode 41 and reduces the impact of the preparation of the auxiliary electrode 51 on the performance of the light-emitting device.

[0154] It should be noted that, due to the presence of the functional film layer 60, even if the auxiliary electrode 51 has a full-surface structure, the portion of the auxiliary electrode 51 corresponding to the light-emitting structure 31 can be spaced apart from the second electrode 41 by the functional portion 61, thereby reducing the impact of this portion of the structure on the performance of the light-emitting device. Optionally, the auxiliary electrode 51 includes a first electrode portion 52 located within the gap and a second electrode portion 53 located on the side of the functional portion 61 facing away from the substrate 10, with the first electrode portion 52 and the second electrode portion 53 integrally connected.

[0155] Thirdly, please refer to Figure 11This application provides a display device, which includes the display panel in any of the foregoing embodiments.

[0156] It should be noted that the display device provided in this application embodiment has the beneficial effects of the display panel in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the display panel. This application embodiment will not repeat the description.

[0157] Fourthly, please refer to Figure 12 As shown in Figure 13, this application embodiment provides a method for manufacturing a display panel, the method comprising:

[0158] S100: A light-emitting functional layer is formed on one side of the substrate.

[0159] Please see Figure 13a In step S100, the light-emitting functional layer 30 includes a plurality of light-emitting structures 31 spaced apart. For example, the plurality of light-emitting structures 31 include, but are not limited to, a red light-emitting structure 31 for emitting red light, a green light-emitting structure 31 for emitting green light, and a blue light-emitting structure 31 for emitting blue light.

[0160] S110: A second electrode layer is formed on the side of the light-emitting functional layer away from the substrate.

[0161] Please see Figure 13b In step S110, the second electrode layer 40 includes a second electrode 41, the orthographic projection of the second electrode 41 onto the substrate 10 covering the orthographic projection of the plurality of light-emitting structures 31 onto the substrate 10. Exemplarily, the second electrode 41 is a cathode, and prior to step S100, a first electrode layer 20 is formed on one side of the substrate 10. The first electrode layer 20 includes a plurality of spaced first electrodes 21, each of which is correspondingly disposed to one of the plurality of light-emitting structures 31.

[0162] S120: An auxiliary electrode layer is formed on the side of the second electrode layer away from the substrate.

[0163] Please see Figure 13c In step S120, the auxiliary electrode layer 50 includes a first electrode portion 52 that is in contact with and electrically connected to the second electrode 41. The orthographic projection of the first electrode portion 52 onto the substrate 10 is outside the orthographic projection of the light-emitting structure 31 onto the substrate 10. Optionally, the first electrode portion 52 can be patterned using a mask with a specific morphology so that the auxiliary electrode layer 50 includes only the first electrode portion 52.

[0164] In this embodiment, an auxiliary electrode layer 50 is formed by adding an additional process, thereby reducing the resistance in the second electrode 41 by means of the electrical connection between the first electrode portion 52 and the second electrode 41 in the auxiliary electrode layer 50. Furthermore, by using patterning or other methods, the first electrode portion 52 in the auxiliary electrode layer 50, which is in direct contact with the second electrode 41, is not a full-surface structure, but rather its orthographic projection is located outside the orthographic projection of the light-emitting structure 31 onto the substrate 10. This reduces damage to the light-emitting device during its fabrication process and improves the performance reliability of the light-emitting device.

[0165] In some embodiments, please refer to Figure 14 As shown in Figure 15, step S120 includes:

[0166] S121: A functional film layer is formed on the side of the second electrode layer away from the substrate.

[0167] Please see Figure 15a In step S121, the functional film layer 60 includes a plurality of functional portions 61 spaced apart, and the orthographic projections of the plurality of functional portions 61 onto the substrate 10 overlap with the orthographic projections of different light-emitting structures 31 onto the substrate 10. In related technologies, the functional film layer 60 is usually a full-surface structure, but in the embodiments of this application, it is not a full-surface structure but includes a plurality of spaced functional portions 61. Optionally, the plurality of spaced functional portions 61 can be formed using a fine metal mask with a specific morphology.

[0168] S122: An auxiliary electrode layer is formed on the side of the functional film layer away from the substrate.

[0169] Please see Figure 15b In step S122, the auxiliary electrode layer 50 is not formed before the functional film layer 60, but after the functional film layer 60. Therefore, the fabrication process of the auxiliary electrode layer 50 is affected by the functional film layer 60. As a result, the first electrode portion 52 can not be a full-surface structure, but is located between adjacent functional portions 61. In this way, the orthographic projection of the first electrode portion 52 on the substrate 10 can be located outside the orthographic projection of the light-emitting structure 31 on the substrate 10, thereby reducing the adverse effects of over-layer fabrication on the light-emitting device and improving the performance reliability of the light-emitting device. Optionally, the auxiliary electrode layer 50 is formed by a sputtering process.

[0170] In some embodiments, please refer to Figure 16 and Figure 17 After step S120, the following steps are also included:

[0171] S130: An encapsulation functional layer is formed on the side of the auxiliary electrode layer away from the substrate;

[0172] Please see Figure 17In step S130, the encapsulation functional layer 90 is formed after the auxiliary electrode layer 50, and its orthographic projection on the substrate 10 covers the orthographic projection of the light-emitting structure 31 and the first electrode portion 52 on the substrate 10. Based on this, the encapsulation functional layer 90 not only provides encapsulation protection for the light-emitting device, but also provides encapsulation protection for the first electrode portion 52, reducing the risk of moisture or other contaminants entering the first electrode portion 52 and improving the reliability of current transmission between the second electrode 41 and the auxiliary electrode 51.

[0173] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0174] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

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 a plurality of first electrodes 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 a plurality of light-emitting structures arranged at intervals. The orthographic projections of the plurality of light-emitting structures on the substrate and the orthographic projections of the plurality of first electrodes on the substrate overlap accordingly. A second electrode layer is disposed on the side of the light-emitting functional layer opposite to the substrate. The second electrode layer includes a second electrode, and the orthogonal projection of the second electrode on the substrate covers the orthogonal projection of the plurality of light-emitting structures on the substrate. An auxiliary electrode layer is disposed on the side of the second electrode layer opposite to the substrate. The auxiliary electrode layer includes an auxiliary electrode, which is electrically connected to the second electrode and includes a first electrode portion that contacts the second electrode. Wherein, the orthographic projection of the first electrode portion onto the substrate is located outside the orthographic projection of the light-emitting structure onto the substrate.

2. The display panel according to claim 1, characterized in that, It also includes a functional film layer disposed on the side of the second electrode layer away from the substrate. The functional film layer includes a plurality of functional parts disposed at intervals. The orthographic projection of the plurality of functional parts on the substrate overlaps with the orthographic projection of different light-emitting structures on the substrate. The adjacent functional parts are spaced apart to form a gap space, and the first electrode part is located in the gap space; Preferably, the auxiliary electrode further includes a second electrode portion integrally connected to the first electrode portion, wherein the orthographic projection of the second electrode portion on the substrate overlaps with the orthographic projection of the light-emitting structure on the substrate, and the second electrode portion is located on the side of the functional portion away from the substrate; Preferably, the auxiliary electrode layer is formed by a sputtering process; Preferably, the projections of the plurality of functional units onto the substrate and the projections of the plurality of light-emitting structures onto the substrate are arranged in a one-to-one correspondence. Preferably, the functional membrane layer comprises at least two membrane layer structures stacked together.

3. The display panel according to claim 2, characterized in that, The functional film layer includes a light extraction layer, and the functional part includes a light extraction part located within the light extraction layer; The plurality of light extraction portions are spaced apart, and the orthographic projection of the first electrode portion on the substrate is located between the orthographic projections of adjacent light extraction portions on the substrate. Preferably, the functional film layer further includes a protective layer disposed on the side of the light extraction layer opposite to the substrate, and the functional part includes a protective part located within the protective layer; The plurality of protective portions are spaced apart, and the orthographic projection of the first electrode portion on the substrate is located between the orthographic projections of adjacent protective portions on the substrate. Preferably, the refractive index of the light extraction layer is greater than that of the protective layer. Preferably, the material of the protective layer includes lithium fluoride; Preferably, the light extraction layer is disposed in contact with the second electrode layer.

4. The display panel according to claim 3, characterized in that, The plurality of light-emitting structures include a first light-emitting structure and a second light-emitting structure with different light-emitting colors, and the plurality of functional parts include a first functional part and a second functional part arranged at intervals from each other. The orthographic projection of the first functional part on the substrate overlaps with the orthographic projection of the first light-emitting structure on the substrate, and the orthographic projection of the second functional part on the substrate overlaps with the orthographic projection of the second light-emitting structure on the substrate. Wherein, the thickness of the first functional part is greater than the thickness of the second functional part; Preferably, the thickness of the light extraction portion in the first functional unit is greater than the thickness of the light extraction portion in the second functional unit; Preferably, the first light-emitting structure is used to emit red or blue light, and the second light-emitting structure is used to emit green light.

5. The display panel according to claim 2, characterized in that, The orthographic projection of a single functional unit on the substrate overlaps with the orthographic projection of multiple light-emitting structures on the substrate; Preferably, multiple adjacent light-emitting structures together constitute a pixel unit, the multiple pixel units are repeatedly arranged, and the orthographic projections of multiple functional parts on the substrate overlap with the orthographic projections of different pixel units on the substrate. Preferably, a plurality of the pixel units are repeatedly arranged in a first direction and a second direction, wherein the first direction and the second direction are both parallel to the plane of the substrate and intersect each other; In the first direction, the spacing between different adjacent functional parts remains the same; and / or, in the second direction, the spacing between different adjacent functional parts remains the same.

6. The display panel according to claim 1, characterized in that, It also includes an encapsulation functional layer disposed on the side of the auxiliary electrode layer opposite to the substrate, wherein the orthogonal projection of the encapsulation functional layer on the substrate covers the light-emitting structure and the orthogonal projection of the first electrode portion on the substrate; Preferably, the auxiliary electrode further includes a second electrode portion integrally connected to the first electrode portion, wherein the orthographic projection of the second electrode portion on the substrate overlaps with the orthographic projection of the light-emitting structure on the substrate, and the second electrode portion is located on the side of the functional portion away from the substrate; Wherein, the surface of the first electrode portion away from the substrate is located on the side of the surface of the second electrode portion away from the substrate facing the substrate; Preferably, the encapsulation functional layer includes a first inorganic layer, a second inorganic layer, and an organic encapsulation layer located between the first inorganic layer and the second inorganic layer, which are stacked together. The organic encapsulation layer, in its orthogonal projection onto the substrate, covers the light-emitting structure and the orthogonal projection of the first electrode portion onto the substrate.

7. 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 a plurality of first electrodes 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 a plurality of light-emitting structures arranged at intervals. The orthographic projections of the plurality of light-emitting structures on the substrate and the orthographic projections of the plurality of first electrodes on the substrate overlap accordingly. A second electrode layer is disposed on the side of the light-emitting functional layer opposite to the substrate. The second electrode layer includes a second electrode, and the orthogonal projection of the second electrode on the substrate covers the orthogonal projection of the plurality of light-emitting structures on the substrate. A functional film layer is disposed on the side of the second electrode layer away from the substrate. The functional film layer includes a plurality of functional parts arranged at intervals. The orthographic projection of the plurality of functional parts on the substrate overlaps with the orthographic projection of different light-emitting structures on the substrate. Adjacent functional parts are spaced apart to form gap spaces. An auxiliary electrode layer, the auxiliary electrode layer including an auxiliary electrode, the auxiliary electrode being at least partially located within the gap space and electrically connected to the second electrode.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 7.

9. A method for manufacturing a display panel, characterized in that, include: A light-emitting functional layer is formed on one side of the substrate, the light-emitting functional layer comprising a plurality of light-emitting structures spaced apart; A second electrode layer is formed on the side of the light-emitting functional layer opposite to the substrate. The second electrode layer includes a second electrode, and the orthogonal projection of the second electrode on the substrate covers the orthogonal projection of the plurality of light-emitting structures on the substrate. An auxiliary electrode layer is formed on the side of the second electrode layer away from the substrate. The auxiliary electrode layer includes a first electrode portion that is in contact with and electrically connected to the second electrode. The orthogonal projection of the first electrode portion onto the substrate is located outside the orthogonal projection of the light-emitting structure onto the substrate.

10. The preparation method according to claim 9, characterized in that, The step of forming an auxiliary electrode layer on the side of the second electrode layer opposite to the substrate includes: A functional film layer is formed on the side of the second electrode layer away from the substrate. The functional film layer includes a plurality of functional parts arranged at intervals. The orthographic projection of the plurality of functional parts on the substrate overlaps with the orthographic projection of different light-emitting structures on the substrate. The auxiliary electrode layer is formed on the side of the functional film layer away from the substrate, and the first electrode portion is located between adjacent functional portions; Preferably, in the step of forming the auxiliary electrode layer on the side of the functional film layer opposite to the substrate, the auxiliary electrode layer is formed by a sputtering process; Preferably, after the step of forming the auxiliary electrode layer on the side of the second electrode layer opposite to the substrate, the method includes: An encapsulation functional layer is formed on the side of the auxiliary electrode layer opposite to the substrate. The orthogonal projection of the encapsulation functional layer onto the substrate covers the light-emitting structure and the orthogonal projection of the first electrode portion onto the substrate.

Images