A display panel, a preparation method of the display panel, and a display device

Abstract

This application provides a display panel, a method for fabricating the display panel, and a display device, relating to the field of display technology, to solve the problem of crosstalk between pixel units. The display panel provided in this application includes a pixel defining layer, a plurality of first electrodes, a display layer, and a second electrode. The pixel defining layer has a plurality of pixel openings penetrating its thickness. The plurality of first electrodes correspond one-to-one with the plurality of pixel openings, with each first electrode located within its corresponding pixel opening. The display layer is located on a second side of the pixel defining layer and covers each pixel opening and its corresponding first electrode. The second electrode is located on the surface of the display layer opposite to the pixel defining layer. Furthermore, at least one functional layer in the display layer has a discontinuity gap between at least two adjacent pixel openings. In the display panel provided in this application, the lateral conductivity of the functional layer can be reduced, thereby reducing crosstalk between pixel units defined by the pixel openings located on both sides of the discontinuity gap.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device. BACKGROUND

[0002] An organic light emitting diode (OLED) display panel has the advantages of self-illumination, high contrast, high definition, low power consumption, long service life, fast response speed, low manufacturing cost and the like, and has been widely applied in various types of display devices. An organic light emitting diode is a light-emitting device through the injection and recombination of carriers. Under the action of an electric field, holes generated by an anode and electrons generated by a cathode move to a light-emitting layer, and when the holes and the electrons meet in the light-emitting layer, energy excitons are generated, thereby exciting the material in the light-emitting layer to finally generate visible light. In actual application, there is a lateral light-emitting cross-talk between pixel units, which causes a color gamut reduction, color shift, abnormal picture display and other various adverse problems. Therefore, how to effectively prevent cross-talk between pixel units has become a technical problem to be solved. SUMMARY

[0003] The present application provides a display panel with good display effect, a preparation method of the display panel and a display device.

[0004] In a first aspect, the present application provides a display panel. The display panel comprises a pixel defining layer, a plurality of first electrodes, a display layer and a second electrode. The pixel defining layer has a plurality of pixel openings penetrating through the thickness of the pixel defining layer, and the pixel defining layer is used to realize isolation between pixel units and to limit the distribution of the pixel units. The plurality of first electrodes correspond one-to-one to the plurality of pixel openings, and the first electrodes are located in the pixel openings corresponding to the first electrodes. That is, on a first side of the pixel defining layer, the plurality of pixel openings are respectively connected to the plurality of first electrodes. The display layer is located on a second side of the pixel defining layer, wherein the first side and the second side of the pixel defining layer are two opposite sides of the pixel defining layer. The display layer covers each pixel opening and the first electrode corresponding to the pixel opening, and the display layer is used to realize the display function of the display panel. The second electrode is located on the surface of the display layer facing away from the pixel defining layer. The first electrode can be an anode, and the second electrode can be a cathode. Under the action of an external electric field, electrons and holes are injected from the second electrode and the first electrode into the display layer, respectively. The injected electrons and holes meet in the display layer to generate excitons, thereby exciting the light-emitting material in the display layer to generate visible light. In addition, in the display panel, at least one functional layer in the display layer between at least two adjacent pixel openings has a fault gap.

[0005] This means that at least one functional layer in the display layer on both sides of the tomographic gap is disconnected or has poor continuity. Therefore, the lateral conductivity of this functional layer can be reduced, thereby reducing crosstalk between pixel units defined by pixel openings on both sides of the tomographic gap.

[0006] In one example, the distance between two adjacent pixel openings is L, and the distance between the tomographic gap and at least one adjacent pixel opening is L1; wherein L1 / L is less than 50%. For example, L1 / L can specifically be 1%, 10%, 15%, 30%, or 40%, etc. Alternatively, in some cases L1 can be zero.

[0007] In one example, the ratio of the width L2 of the fault gap to L can be greater than or equal to 5%. For example, L2 / L can specifically be 5%, 10%, 20%, 25.5%, or 50%, etc. Alternatively, in some cases L2 can be close to 100%.

[0008] In one example, multiple functional layers within the display layer have tomographic gaps. The projections of these multiple tomographic gaps along the thickness direction of the display layer all coincide. This facilitates the simultaneous fabrication of these multiple tomographic gaps, offering greater manufacturing convenience.

[0009] In one example, the projections of multiple tomographic gaps along the thickness direction of the display layer do not overlap. This helps avoid the accumulation of discontinuities from different tomographic gaps, resulting in higher discontinuities and improving the flatness of the display panel surface. This also ensures better continuity of the second electrode, reducing power supply voltage drop (IR drop) and lowering the power consumption of the display panel.

[0010] In one example, the projections of at least two tomographic gaps along the thickness direction of the display layer have overlapping or non-overlapping regions. This provides good flexibility in setting the relative positions or projection relationships between different tomographic gaps.

[0011] In one example, the display layer also includes an insulating filler that fills the gap between at least one functional layer. By incorporating the insulating filler, the discontinuity caused by the gap can be reduced, thereby improving the flatness of the display layer surface. Furthermore, the insulating filler has good electrical insulation properties, which can reduce the transverse current between the functional layers on both sides of the gap.

[0012] In one example, the thickness of the insulating filler within the fault gap may be the same as or different from the depth of the fault gap.

[0013] In one example, the surface of the display layer facing the cathode is flat between two adjacent pixel openings, which gives the second electrode better continuity, reduces power supply voltage drop (IR drop), and reduces the power consumption of the display panel.

[0014] In one example, the second side of the pixel-defining layer has a flat surface between two adjacent pixel openings, which can improve the flatness of the surface of the display layer facing the second electrode, so that the second electrode has better continuity, and can reduce power supply voltage drop (IR drop) and reduce the power consumption of the display panel.

[0015] In one example, the display layer can be a structure with a single light-emitting layer. For instance, the display layer may include a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer stacked sequentially from the first electrode to the second electrode. This results in a smaller number of functional layers in the display layer, effectively balancing manufacturing costs and display performance. At least one of the aforementioned hole injection layer, hole transport layer, electron blocking layer, light-emitting layer, hole blocking layer, electron transport layer, and electron injection layer has a tomographic gap.

[0016] In one example, the display layer can be a structure with two or more light-emitting layers. For instance, the display layer may include a first sub-display layer, a charge generation layer, and a second sub-display layer stacked sequentially from the first electrode to the second electrode. The first sub-display layer includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, a first light-emitting layer, a first hole blocking layer, and a first electron transport layer stacked sequentially from the first electrode to the second electrode. The second sub-display layer includes a second hole transport layer, a second electron blocking layer, a second light-emitting layer, a second hole blocking layer, a second electron transport layer, and a second electron injection layer stacked sequentially from the second electrode to the second electrode. That is, the first and second sub-display layers can be connected in series through the charge generation layer, which can effectively improve the brightness and lifespan of the display panel and reduce the power consumption of the display panel. At least one functional layer in the first sub-display layer, the charge generation layer, and the second sub-display layer has a tomographic gap.

[0017] In one example, the charge generation layer can be a single-layer structure or a multi-layer structure. That is, the charge generation layer has good flexibility in terms of structural type. Specifically, at least one layer in the charge generation layer contains a tortuous gap.

[0018] In one example, the display panel further includes a driving circuit layer. The driving circuit layer is located on the side of the plurality of first electrodes away from the pixel defining layer. The driving circuitry in the driving circuit layer is connected to the plurality of first electrodes and is used to control the voltage of each of the plurality of first electrodes individually. The main function of the driving circuit layer is to provide voltage to each anode to effectively control the display effects of the display panel, such as brightness and grayscale.

[0019] In one example, the display panel also includes a substrate. The substrate is located on the side of the driving circuit layer away from the plurality of first electrodes. The substrate is the foundation of the display panel, and its main function is to provide a stable support platform to ensure that other functional layers can be stably attached to it. In some examples, the substrate can be rigid or flexible.

[0020] Secondly, this application also provides a method for manufacturing a display panel. This method may include:

[0021] A pixel-defining layer is provided, which has multiple pixel openings that extend through its thickness.

[0022] At least one functional layer in the display layer is prepared on the first side of the pixel-defined layer.

[0023] At least a portion of the material in at least one of the prepared functional layers is removed using a removal process to create a fault gap.

[0024] The fault gap is located between at least two adjacent pixel openings.

[0025] A second electrode is fabricated on the surface of the completed display layer that is away from the pixel-defining layer.

[0026] In the display panel manufactured by the above method, by creating a gap, at least one functional layer in the display layer on both sides of the gap is disconnected or has poor continuity. Therefore, the lateral conductivity of this functional layer can be reduced or blocked. This reduces crosstalk between pixel units defined by pixel openings on both sides of the gap.

[0027] In one example, the tomographic gap can be prepared after all the functional layers of the display layer have been prepared.

[0028] In one example, the method further includes preparing at least one functional layer in the display layer after removing at least a portion of the material from at least one prepared functional layer and before preparing the display layer. That is, the preparation of the tomographic gap is performed before all functional layers in the display layer are prepared.

[0029] In one example, after fabricating at least one functional layer in the display layer, the process further includes: removing at least a portion of the material from at least one functional layer in the fabricated display layer to fabricate a tomographic gap again. That is, when multiple functional layers have tomographic gaps, the material in different functional layers can be removed multiple times to fabricate tomographic gaps in different functional layers.

[0030] In one example, after creating the fracture gap, the method further includes filling the fracture gap with an insulating material. By filling the fracture gap with an insulating material, the fracture caused by the fracture gap can be reduced or avoided, thereby improving the smoothness of the display layer surface.

[0031] In one example, the removal process includes at least one of laser ablation or inductively coupled plasma etching. That is, the process for creating the fault gap can be diverse, offering good flexibility.

[0032] Thirdly, this application also provides a display device. The display device may include the display panel described in the first aspect. Alternatively, it may include a display panel manufactured by the method described in the second aspect. By equipping the display device with the aforementioned display panel, the display device achieves better color gamut and image display effects. Furthermore, the display device has lower power consumption, which helps improve battery life and user experience. Attached Figure Description

[0033] Figure 1 A cross-sectional view of a display panel provided in an embodiment of this application;

[0034] Figure 2 A cross-sectional view of a display layer provided in an embodiment of this application;

[0035] Figure 3 A cross-sectional view of another display panel provided in an embodiment of this application;

[0036] Figure 4 Another cross-sectional view of a display layer provided in an embodiment of this application;

[0037] Figure 5 A cross-sectional view of another display panel provided in an embodiment of this application;

[0038] Figure 6 Another cross-sectional view of a display layer provided in an embodiment of this application;

[0039] Figure 7 Another cross-sectional view of a display layer provided in an embodiment of this application;

[0040] Figure 8 A cross-sectional view of another display panel provided in an embodiment of this application;

[0041] Figure 9 A cross-sectional view of another display panel provided in an embodiment of this application;

[0042] Figure 10 Another cross-sectional view of a display layer provided in an embodiment of this application;

[0043] Figure 11A cross-sectional view of another display panel provided in an embodiment of this application;

[0044] Figure 12 A cross-sectional view of another display panel provided in an embodiment of this application;

[0045] Figure 13 A flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0046] Figure 14 A cross-sectional view of a display panel during its manufacturing process, provided as an embodiment of this application;

[0047] Figure 15 A cross-sectional view of a display panel during its manufacturing process, provided as an embodiment of this application;

[0048] Figure 16 A cross-sectional view of a display panel during its manufacturing process, provided as an embodiment of this application;

[0049] Figure 17 A cross-sectional view of a display panel during its manufacturing process, provided as an embodiment of this application;

[0050] Figure 18 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0052] To facilitate understanding of the display panel provided in the embodiments of this application, its application scenarios will be introduced first below.

[0053] The display panel provided in this application embodiment is specifically an organic light-emitting diode (OLED) display panel. OLED display panels have advantages such as self-illumination, high contrast, high definition, low power consumption, long lifespan, fast response speed, and low manufacturing cost, and have been widely used in various types of display devices. For example, OLED display panels can be used in devices with display function requirements such as mobile phones, tablets, smartwatches, smart bracelets, monitors, and televisions.

[0054] like Figure 1 As shown, in one possible example, the OLED display panel 10 may include a substrate 15, a driving circuit layer 16, an anode (such as anode 12a), a pixel define layer (PDL), a display layer 13, and a cathode 14. Figure 1The diagram shows three anodes: anode 12a, anode 12b, and anode 12c.

[0055] The substrate 15 is the foundation of the OLED display panel 10, and its main function is to provide a stable support platform to ensure that other functional layers can be stably attached to it. In some examples, the substrate 15 can be rigid or flexible, and this application does not limit it.

[0056] The driving circuit layer 16 is located on one side of the substrate 15. Its main function is to provide voltage to each anode in order to effectively control the display effects such as brightness and grayscale of the OLED display panel 10.

[0057] Anodes 12a, 12b, and 12c are all located on the side of the driving circuit layer 16 away from the substrate 15, and each anode is connected to the driving circuit layer 16. The anodes primarily consist of ITO material, which has high conductivity and visible light transmittance. In one example, the anodes can use commonly used materials, which will not be elaborated upon in this application. It should be noted that... Figure 1 In the example provided, three anodes are shown for ease of illustration. In one possible example, there may be multiple anodes, and this application does not limit this.

[0058] The pixel defining layer 11, also known as the pixel definition layer, is located on the side of the anode away from the driving circuit layer 16. Its main function is to isolate pixel units and define their distribution. For example, the pixel defining layer includes pixel openings. Figure 1 The diagram shows three pixel openings, namely pixel opening 111a, pixel opening 111b, and pixel opening 111c. One side of each pixel opening is connected to the anode, and the area defined by each pixel opening can be considered as a pixel unit.

[0059] The display layer 13 is located on the side of the pixel limiting layer 11 away from the anode, and the display layer 13 fills the pixel openings 111a, 111b and 111c.

[0060] The cathode 14 is located on the side of the display layer 13 away from the pixel limiting layer 11. The main function of the cathode 14 is to provide a current source so that electrons can be injected smoothly.

[0061] The working principle of OLED light emission can be simply divided into the following processes: Under the action of an external electric field, electrons and holes are injected from the cathode 14 and the anode into the display layer 13, respectively. The injected electrons and holes meet in the light-emitting material of the display layer 13 to generate excitons, thereby exciting the light-emitting material in the display layer 13 to produce visible light.

[0062] In one implementation, the structure type in the display layer 13 can be diverse.

[0063] For example, such as Figure 2 As shown, in one example, the display layer 13 includes a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), an emitting layer (EML), a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL) stacked sequentially. Please refer to [reference needed]. Figure 1 and Figure 2 In the display panel 10, the HIL, HTL, EBL, EML, HBL, ETL, and EIL layers in the display layer 13 are stacked sequentially from the anode to the cathode. The structure of each layer in the display layer 13 is a well-known technology and will not be described in detail here.

[0064] The materials in the EML (Emitting Material Layer) can be categorized by color into RGB and other color emitting materials. In other words, the light emitted in each pixel unit can be a single color or multiple different colors.

[0065] In practical applications, some functional layers in the display layer 13 (such as the hole injection layer) have high lateral conductivity, leading to lateral light emission crosstalk between pixel units in the display panel 10. For example, the pixel unit defined by pixel aperture 111a is used to generate red light, and the pixel unit defined by pixel aperture 111b is used to generate blue light. When the pixel unit defined by pixel aperture 111a emits light, it will emit red light in the pixel unit defined by pixel aperture 111b, resulting in impure blue light emitted by the pixel unit defined by pixel aperture 111b. This causes various problems such as reduced color gamut, color shift, and abnormal image display in the display panel 10. It is understandable that when the pixel unit defined by pixel aperture 111b emits light, it will also emit blue light in the pixel units defined by pixel apertures 111a and 111c. That is, crosstalk will occur between two adjacent pixel units, causing various problems such as reduced color gamut, color shift, and abnormal image display in the display panel 10.

[0066] Therefore, this application provides a display panel 10 that can effectively improve the crosstalk problem between pixel units.

[0067] 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.

[0068] like Figure 3 As shown, in one example provided in this application, the display panel 10 includes a pixel defining layer 11, a plurality of first electrodes, a display layer 13, and a second electrode 14. The pixel defining layer 11 has a plurality of pixel openings extending through its thickness, which are used to isolate pixel units and define the distribution of pixel units. The plurality of first electrodes correspond one-to-one with the plurality of pixel openings, and the first electrodes are located within their corresponding pixel openings. Specifically, in... Figure 3 The example provided illustrates three pixel openings and three first electrodes. The three pixel openings are pixel opening 111a, pixel opening 111b, and pixel opening 111c. The three first electrodes are first electrode 12a, first electrode 12b, and first electrode 12c. On the first side of the pixel defining layer 11, pixel opening 111a is connected to first electrode 12a, pixel opening 111b is connected to first electrode 12b, and pixel opening 111c is connected to first electrode 12c.

[0069] The display layer 13 is located on the second side of the pixel defining layer 11, and covers each pixel opening and the corresponding first electrode. The first side and the second side are opposite sides of the pixel defining layer 11. The second electrode 14 is located on the surface of the display layer 13 opposite to the pixel defining layer 11.

[0070] In one implementation, the first electrode can be an anode or a cathode, and the second electrode 14 can be a cathode or an anode. To facilitate understanding of the technical solution of this application, the following example will exemplify the use of first electrodes 12a, 12b, and 12c as anodes and second electrode 14 as a cathode.

[0071] Under the influence of an external electric field, electrons and holes are injected into the display layer 13 from the second electrode 14 and the first electrodes 12a, 12b, and 12c, respectively. The injected electrons and holes meet in the display layer 13 to generate excitons, thereby exciting the light-emitting material in the display layer 13 to produce visible light.

[0072] In the example provided in this application, the display layer 13 has a gap 131a between pixel openings 111a and 111b. The display layer 13 also has a gap 131b between pixel openings 111b and 111c. A second electrode 14 is located on the surface of the display layer 13 opposite to the pixel defining layer 11, and the second electrode 14 fills within the gaps 131a and 131b. That is, the second electrode 14 is a continuous layer structure, resulting in lower lateral resistance, which helps reduce the power supply voltage drop (IR drop) and thus reduces the power consumption of the display panel 10. Alternatively, it can be understood that in some current display panels 10, the second side of the pixel defining layer 11 has a groove or protrusion structure between pixel openings 111a and 111b to reduce crosstalk between the pixel units defined by pixel opening 111a and the display units defined by pixel opening 111b. However, structures such as grooves or protrusions can reduce the flatness of the surface of the display layer 13, leading to problems such as discontinuities and increased impedance in the second electrode 14, thereby worsening the power supply voltage drop of the display panel 10. In the example provided in this application, the surface of the second side of the pixel limiting layer 11 between two adjacent pixel openings is a flat surface. Therefore, the surface flatness of the display layer 13 is better, which helps to ensure the continuity of the second electrode 14 and reduce impedance, thus ensuring the power supply voltage drop of the display panel 10 and having lower power consumption.

[0073] In the example provided in this application, the display layer 13 has a discontinuity gap 131a between pixel openings 111a and 111b, meaning the display layers 13 on both sides of the discontinuity gap 131a are disconnected. Therefore, the conduction of lateral current in the display layer 13 within pixel opening 111a and pixel opening 111b can be blocked, preventing crosstalk between them. Correspondingly, the display layer 13 has a discontinuity gap 131b between pixel openings 111b and 111c, meaning the display layers 13 on both sides of the discontinuity gap 131b are disconnected. Therefore, the conduction of lateral current in the display layer 13 within pixel opening 111b and pixel opening 111c can be blocked, preventing crosstalk between them.

[0074] Or it can be understood that, for example Figure 1 As shown, in Figure 1In the example provided, the entire display layer 13 is continuous, meaning there are no gaps or breaks in the display layer 13. For example, the pixel unit defined by pixel opening 111a is used to generate red light, and the pixel unit defined by pixel opening 111b is used to generate blue light. When the pixel unit defined by pixel opening 111a emits light, it will emit red light in the pixel unit defined by pixel opening 111b, resulting in impure blue light emitted by the pixel unit defined by pixel opening 111b. This causes various problems such as reduced color gamut, color shift, and abnormal image display in the display panel 10.

[0075] exist Figure 3 In the example provided, because there is a gap 131a in the display layer 13 between pixel openings 111a and 111b, when the pixel unit defined by pixel opening 111a emits light, crosstalk is less likely to occur in the pixel unit defined by pixel opening 111b. The light emission purity of the pixel unit defined by pixel opening 111b is better, which is beneficial to improving the color gamut of the entire display panel 10 and has a better display effect. It can be understood that when the pixel unit defined by pixel opening 111b emits light, crosstalk is less likely to occur in the pixel units defined by pixel openings 111a and 111c, and the light emission purity of the pixel units defined by pixel openings 111a and 111c is better. In other words, the crosstalk between the pixel units defined by two adjacent pixel openings is low or non-existent, resulting in a better display effect for the entire display panel 10.

[0076] It should be noted that, in Figure 3 In the example provided, there is a gap 131a between the pixel unit defined by pixel opening 111a and the display unit defined by pixel opening 11b, and a gap 131b between the pixel unit defined by pixel opening 111b and the pixel unit defined by pixel opening 111c. That is, there is a gap between the pixel units defined by adjacent pixel openings. In other examples, there may be a gap between the pixel units defined by at least two pixel openings, which will not be elaborated here.

[0077] In addition, Figure 3 In the example provided, both the tomographic gap 131a and the tomographic gap 131b extend through the entire thickness of the display layer 13. In other examples, the tomographic gap 131a or the tomographic gap 131b may extend through at least one layer of the display layer 13.

[0078] The penetration conditions of fault gaps 131a and 131b can be the same or different.

[0079] The following will describe in detail the different settings of fault gap 131a, taking fault gap 131a as an example, with reference to the attached drawings. When setting other fault gaps, the same or similar settings can be made with reference to fault gap 131a.

[0080] like Figure 4 As shown, in one example provided in this application, the display layer 13 includes a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), an emitting layer (EML), a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL) stacked sequentially. Please refer to [reference needed]. Figure 3 and Figure 4 In the display panel 10, the HIL, HTL, EBL, EML, HBL, ETL, and EIL layers in the display layer 13 are stacked sequentially from the first electrode 12a toward the second electrode 14. Each functional layer in the display layer 13 is a well-known technology and will not be described in detail here.

[0081] exist Figure 3 and Figure 4 In the example provided, the tomographic gap 131a extends through the entire thickness of the display layer 13, meaning that each functional layer in the display layer 13 is disconnected on both sides of the tomographic gap 131a. Alternatively, it can be viewed as each functional layer having a tomographic gap. Specifically, the hole injection layer HIL has a tomographic gap 1311a, the hole transport layer HTL has a tomographic gap 1312a, the electron blocking layer EBL has a tomographic gap 1313a, the light-emitting layer EML has a tomographic gap 1314a, the hole blocking layer HBL has a tomographic gap 1315a, the electron transport layer ETL has a tomographic gap 1316a, and the electron injection layer EIL has a tomographic gap 1317a. Alternatively, the tomographic gap 131a can be viewed as including the tomographic gaps in each of the aforementioned functional layers. This method effectively blocks the conduction of lateral current in the display layer 13 on both sides of the tomographic gap 131a, and can largely prevent crosstalk between adjacent pixel units.

[0082] In one example, assuming the distance between pixel opening 111a and pixel opening 111b is L, and the distance between the tomographic gap 131a and pixel opening 111a is L1, then L1 / L can be less than 50% to block crosstalk between the pixel units defined by pixel opening 111a and pixel units defined by pixel opening 111b. Specifically, L1 / L can be less than 50%. For example, L1 / L can be 1%, 10%, 15%, 30%, or 40%, etc. Alternatively, in some cases, L1 can be zero.

[0083] Alternatively, the ratio of the distance between the fault gap 131a and the pixel opening 111b to L can also be less than 50%.

[0084] In one example, the width dimension L2 of the fault gap 131a can be greater than or equal to 5%. For example, L2 / L can specifically be 5%, 10%, 20%, 25.5%, or 50%, etc. Alternatively, in some cases L2 can be close to 100%.

[0085] It should be noted that pixel openings 111a, 111b, and 111c are open-type structures with sloping sidewalls (or a slope) inside. The distance L between pixel openings 111a and 111b refers to the minimum distance between the edge of pixel opening 111a on the first side of the pixel limiting layer 11 and the edge of pixel opening 111b on the first side of the pixel limiting layer 11.

[0086] In addition, Figure 4 In the example provided, the cross-sectional shape and cross-sectional area of ​​the fault gap 131a are substantially the same along the depth direction of the fault gap 131a. Alternatively, it can be viewed that the cross-sectional shape and cross-sectional area of ​​the fault gaps in each functional layer of the display layer 13 are the same, and the projections of the multiple fault gaps along the thickness direction of the display layer 13 all coincide.

[0087] In other examples, the cross-sectional shape of the fault gap 131a can also be different along the depth direction of the fault gap 131a. Furthermore, the cross-sectional area of ​​the fault gap 131a can also increase, decrease, or vary according to other rules along the depth direction of the fault gap 131a. That is, the cross-sectional shape or cross-sectional area of ​​the fault gaps in each functional layer can be the same or different.

[0088] exist Figure 4 In the example provided, the fracture gap 131a extends through the entire display layer 13. In other examples, the fracture gap 131a may extend through any one or more layers of the display layer 13. Alternatively, it can be viewed that at least one functional layer of the display layer 13 has a fracture gap.

[0089] For example, such as Figure 5 As shown, in another example provided in this application, the tomographic gap 131a only penetrates the hole injection layer HIL in the display layer 13. Alternatively, it can be considered that the tomographic gap 131a is only present in the hole injection layer HIL, and there are no tomographic gaps in other functional layers. The hole injection layer HIL contains a highly conductive material with high lateral conductivity, while the other functional layers in the display layer 13 have lower lateral conductivity. Since the tomographic gap 131a only penetrates the hole transport layer HIL, the lateral current in the display layer 13 can be significantly reduced, which is beneficial for reducing the manufacturing cost and time of the tomographic gap 131a. In addition, it can also improve the flatness of the surface of the display layer 13 facing the second electrode 14, thereby ensuring the continuity of the second electrode 14, reducing the power supply voltage drop (IR drop), and thus reducing the power consumption of the display panel 10.

[0090] Specifically, such as Figure 5 As shown, when fabricating the display layer 13, multiple functional layers in the display layer 13 are typically fabricated sequentially using processes such as vapor deposition. Then, processes such as laser ablation or inductively coupled plasma etching (ICP) are used to etch the functional layers that need to be separated, thereby forming gaps between layers. For example, in the fabrication of the display layer 13... Figure 5 When fabricating the display layer 13 shown, a hole injection layer HIL can be prepared first, and then the hole injection layer HIL can be etched by laser ablation and other processes to form a tomographic gap 1311a (131a).

[0091] By comparison Figure 4 and Figure 5 It is obvious that, Figure 5 Only the hole injection layer (HIL) needs to be etched, requiring a shorter etching time. Figure 4 In this process, the entire display layer 13 needs to be etched, which requires a relatively long etching time. In other words, when the depth of the gap 131a or the number of functional layers penetrated by the gap 131a is small, the etching time can be effectively reduced, which is beneficial to improving the fabrication efficiency of the gap 131a.

[0092] In addition, such as Figure 5As shown, after etching the hole injection layer HIL to form the gap 1311a (131a), a hole transport layer HTL can be fabricated on the surface of the hole injection layer HIL using processes such as vapor deposition. Part of the material in the hole transport layer HTL fills the gap 1311a (131a), thus mitigating the discontinuity formed by the gap 1311a (131a) to some extent. With the subsequent fabrication of other functional layers, the discontinuity formed by the gap 1311a (131a) is further reduced, resulting in a high degree of flatness on the surface of the display layer 13 (such as the electron injection layer EIL).

[0093] Alternatively, it can be understood that in some examples, the surface of the display layer 13 facing the second electrode 14 can be a flat surface or a near-flat surface. This flat surface can be formed by filling the fracture gap with other functional layers. Alternatively, it can be formed by filling the fracture gap with other materials. These different cases will be described separately in the following examples, and will not be elaborated upon here.

[0094] like Figure 5 As shown, when the second electrode 14 is fabricated on the surface of the display layer 13 (such as the electron injection layer EIL), the second electrode 14 has good flatness and continuity, which can reduce the planar resistance of the second electrode 14, thereby reducing the power supply voltage drop (IRdrop) and enabling the display panel 10 to have lower power consumption.

[0095] Alternatively, in other examples, at least two functional layers in display layer 13 may have tomographic gaps. Furthermore, when multiple functional layers have tomographic gaps, the projection relationships between these gaps can be varied. The following example, using three functional layers in display layer 13, will be provided as an illustration.

[0096] like Figure 6 and Figure 7 As shown, in one example provided in this application, the hole injection layer HIL has a tomographic gap 1311a, the hole transport layer HTL has a tomographic gap 1312a, and the electron blocking layer EBL has a tomographic gap 1313a. It should be noted that in practical applications, the portion of the hole transport layer HTL corresponding to tomographic gap 1311a will fill tomographic gap 1311a, and the portion of the electron blocking layer EBL corresponding to tomographic gap 1312a will fill tomographic gap 1312a. Figure 6 and Figure 7 In the example provided, to clearly show each fault gap, no other functional layer material from the upper layer is filled in each fault gap.

[0097] like Figure 6As shown, along the thickness direction of the display panel 10, the projections of the interlayer gaps 1311a, 1312a, and 1313a do not overlap; that is, there are no areas where the projections of the interlayer gaps 1311a, 1312a, and 1313a intersect or overlap. This helps to avoid the accumulation of discontinuities from different interlayer gaps, thus preventing the formation of higher discontinuities and improving the flatness of the surface of the display panel 10.

[0098] Or, such as Figure 7 As shown, in another example provided in this application, along the thickness direction of the display panel 10, the projections of the fracture gaps 1311a and 1312a do not overlap. The projections of the fracture gaps 1312a and 1313a overlap. That is, there is no area where the projections of the fracture gaps 1311a and 1312a intersect or overlap, while there are overlapping and non-overlapping areas between the projections of the fracture gaps 1312a and 1313a.

[0099] Or, such as Figure 4 As shown, in another example provided in this application, the projections of the fracture gap 1313a, fracture gap 1312a and fracture gap 1313a all coincide along the thickness direction of the display panel 10.

[0100] In summary, when multiple functional layers in display layer 13 have tomographic gaps, the projections of the multiple tomographic gaps along the thickness direction of display layer 13 can all coincide. Alternatively, the projections of the multiple tomographic gaps along the thickness direction of display layer 13 can all be non-overlapping. Alternatively, at least two tomographic gaps have overlapping or non-overlapping regions in their projections along the thickness direction of display layer 13.

[0101] When the projections of multiple interlayer gaps along the thickness direction of the display panel 10 do not overlap, it helps to avoid the accumulation of discontinuities between different interlayer gaps, thus preventing the formation of higher discontinuities and improving the flatness of the display panel 10 surface. When the projections of interlayer gaps in adjacent functional layers along the thickness direction of the display panel 10 coincide, it facilitates the simultaneous fabrication of these multiple interlayer gaps, providing good manufacturing convenience. In one possible implementation, the projection relationships between multiple functional layers can be reasonably selected and adjusted according to actual needs, which will not be elaborated here.

[0102] like Figure 8As shown, when the discontinuity caused by the torn gap 131a is large, it reduces the flatness of the display panel 10 surface, resulting in poor continuity of the second electrode 14 and making it prone to problems such as poor continuity and poor planar conductivity. Therefore, the discontinuity caused by the torn gap can be compensated by filling the torn gap in at least one functional layer with insulating material, so that the surface of the display layer 13 facing the second electrode 14 is a flat surface or a near-flat surface.

[0103] For example, such as Figure 9 As shown, in one example provided in this application, the display layer 13 further includes an insulating filler 17, which fills the fracture gap 131a. By providing the insulating filler 17, the discontinuity caused by the fracture gap 131a can be reduced, thereby improving the flatness of the surface of the display layer 13. In addition, the insulating filler 17 has good electrical insulation properties, which can reduce the transverse current between the functional layers on both sides of the fracture gap 131a. In one example, the material of the insulating filler 17 can be an organic material such as resin, polyimide, or polytetrafluoroethylene, or an inorganic material such as silicon nitride or silicon oxide, which will not be elaborated here.

[0104] exist Figure 9 In the example provided, the thickness of the insulating filler 17 is slightly less than the depth of the fracture gap 131a. In other examples, the thickness of the insulating filler 17 may also be equal to the depth of the fracture gap 131a. Alternatively, the thickness of the insulating filler 17 may also be slightly greater than the depth of the fracture gap 131a.

[0105] It should be noted that, in Figure 8 The example provided illustrates that the gaps in each functional layer coincide when projected along the thickness direction of the display panel 10, and that the insulating filler 17 fills the gaps in each functional layer.

[0106] In other examples, the insulating filler 17 may also fill only the fracture gap in one functional layer. In general, the insulating filler 17 may fill the fracture gap in at least one functional layer. Furthermore, the thickness of the filler within the fracture gap may be greater than, equal to, or less than the depth of the fracture gap.

[0107] It is understood that in the above examples, when a functional layer in display layer 13 has a gap, the gap extends through the thickness of the functional layer. In other examples, the gap may not extend through the thickness of the functional layer; that is, the depth of the gap may be less than the thickness of the functional layer. Furthermore, in the examples provided above, only one gap is shown when a functional layer has a gap. In other examples, any functional layer may include two or more gaps. Multiple gaps may be continuous or discontinuous. Alternatively, when a functional layer includes multiple gaps, the cross-sectional shapes of the gaps may be identical, or at least two gaps may have different cross-sectional shapes.

[0108] Furthermore, the above example illustrates a display layer 13 comprising a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, a light-emitting layer EML, a hole blocking layer HBL, an electron transport layer ETL, and an electron injection layer EIL stacked sequentially. In other examples, some functional layers in display layer 13 may be omitted. Alternatively, display layer 13 may include other functional layers.

[0109] For example, in one possible example, the display panel 10 can be a tandem organic light-emitting diode (TANDEM) display panel. Simply put, the display panel 10 can include multiple stacked display layers. In other words, the display layer includes multiple stacked sub-display layers, and adjacent sub-display layers are connected in series via a charge generation layer (CGL). Compared to display panels with a single display layer (or sub-display layer), tandem OLED display panels have advantages such as high brightness, low power consumption, and long lifespan. For ease of understanding, the following example illustrates a tandem OLED display layer comprising two sub-display layers.

[0110] Specifically, such as Figure 10 As shown, display layer 13 includes a first sub-display layer 132, a charge generation layer 134, and a second display layer 133 stacked sequentially. Alternatively, the first sub-display layer 132, the charge generation layer 134, and the second sub-display layer 133 can also be collectively referred to as display layer 13. Figure 3 and Figure 10 As shown, when Figure 10 The display layer 13 shown is applied in Figure 3 In the display panel 10 shown, the first sub-display layer 132, the charge generation layer 134, and the second sub-display layer 133 are stacked sequentially from the first electrode 12a toward the second electrode 14.

[0111] In one example, the number and type of functional layers contained in the first sub-display layer 132, the charge generation layer 134, and the second sub-display layer 133 can be varied.

[0112] For example, such as Figure 10 As shown, in one example provided in this application, the first sub-display layer 132 includes a first hole injection layer HIL1, a first hole transport layer HTL1, a first electron blocking layer EBL1, a first light-emitting layer EML1, a first hole blocking layer HBL1, and a first electron transport layer ETL1 stacked sequentially along a first direction. The second sub-display layer 133 includes a second hole transport layer HTL2, a second electron blocking layer EBL2, a second light-emitting layer EML2, a second hole blocking layer HBL2, a second electron transport layer ETL2, and a second electron injection layer EIL2 stacked sequentially along the first direction. The charge generation layer 134 includes nCGL and pCGL stacked sequentially along the first direction. Here, nCGL refers to a charge generation layer made of n-type semiconductor material, and pCGL refers to a charge generation layer functional layer made of p-type semiconductor material. nCGL is used to inject generated electrons into the first electron transport layer element ETL1, and pCGL is used to inject generated holes into the second hole transport layer HTL2. The first direction refers to the direction from the first electrode 12a to the second electrode 14.

[0113] In other examples, the charge generation layer 134 can be a single-layer structure or a multi-layer structure, and this application does not limit it in this regard.

[0114] Additionally, in one example, at least one functional layer in the first light-emitting layer 132 may have a tomographic gap. At least one functional layer in the second light-emitting layer 133 may have a tomographic gap. At least one functional layer in the charge-generating layer 134 may have a tomographic gap. That is, at least one functional layer in the entire display layer 13 may have a tomographic gap.

[0115] For example, such as Figure 10As shown, in one example provided in this application, the nCGL of the charge generation layer 134 has a tortuosity gap 1318a, which penetrates the thickness of the nCGL. The pCGL has a tortuosity gap 1319a, which penetrates the thickness of the pCGL. Furthermore, the projections of the tortuosity gaps 1318a in the nCGL and 1319a in the pCGL along the thickness direction of the display layer 13 coincide. That is, the tortuosity gap 131a in the display layer 13 penetrates the entire charge generation layer 134. It should be noted that, for clear illustration of the tortuosity gaps 1318a and 1319a, neither of the tortuosity gaps 1318a nor 1319a is filled with other functional layer materials from the upper layer.

[0116] The shape, area, location, or size of fault gaps 1318a and 1319a can be set in the same or similar manner as the fault gaps mentioned in the above examples. Additionally, fault gaps 1318a and 1319a can also be filled with insulating fillers, which will not be elaborated upon here.

[0117] In some examples, the display panel 10 may also include other structures.

[0118] For example, such as Figure 11 As shown, in another example provided in this application, the display panel 10 also includes a substrate 15 and a driving circuit layer 16.

[0119] The substrate 15 is the foundation of the OLED display panel 10, and its main function is to provide a stable support platform to ensure that other functional layers can be stably attached to it. In some examples, the substrate 15 can be rigid or flexible, and this application does not limit the specific material and structural characteristics of the substrate 15.

[0120] The driving circuit layer 16 is located on one side of the substrate 15. Its main function is to provide voltage to each anode in order to effectively control the display effects such as brightness and grayscale of the OLED display panel 10.

[0121] Anodes 12a, 12b, and 12c are all located on the side of the drive circuit layer 16 away from the substrate 15, and each anode is connected to the drive circuit layer 16. The anodes mainly consist of ITO material, which has high conductivity and visible light transmittance.

[0122] It is understandable that in other examples, the display panel 10 may also include other structures, which will not be elaborated here.

[0123] When manufacturing the display panel 10 described in the above example, a variety of different methods and processes can be used.

[0124] For example, embodiments of this application also provide a method for preparing such as Figure 12 The method for manufacturing the display panel 10 shown is illustrated. It should be noted that when the display panel 10 has other structural forms, the following methods or processes can also be used for its manufacturing. To facilitate understanding of the technical solution of this application, the following will use… Figure 13 Taking the display panel 10 as an example, its preparation method will be described by way of example.

[0125] like Figure 14 As shown, the method includes:

[0126] Step S1: Provide a pixel-limited layer.

[0127] Step S2: Prepare at least one functional layer in the display layer on the first side of the pixel-defined layer.

[0128] Step S3: Remove at least a portion of the material in at least one of the prepared functional layers using a removal process.

[0129] Step S4: Prepare a second electrode on the surface of the prepared display layer away from the pixel-defining layer.

[0130] Specifically, such as Figure 15 As shown, in step S1, the pixel defining layer 11 has two pixel openings that penetrate its thickness, namely pixel opening 111a and pixel opening 111b. Of course, in other examples, the pixel defining layer 11 may have multiple pixel openings that penetrate its thickness. The number, layout, shape, and fabrication process of the pixel openings are not limited in this application.

[0131] like Figure 15 As shown, in step S2, a display layer 13 can be fabricated on the first side of the pixel-defining layer 11 using processes such as vapor deposition. It should be noted that the display layer 13 includes multiple functional layers fabricated sequentially. Figure 16 In the example provided, all functional layers in display layer 13 have been fabricated.

[0132] like Figure 16 As shown, in step S3, a removal process can be used to remove at least a portion of the material in the prepared at least one functional layer to prepare a tomographic gap 131a, which is located between pixel openings 111a and 111b. In other examples, when the pixel defining layer 11 includes multiple pixel openings, the tomographic gap can be prepared between at least two adjacent pixel openings.

[0133] The removal process may include at least one of laser ablation or inductively coupled plasma etching. In actual fabrication, a suitable process can be used to remove material from the functional layer to create interlayer gaps.

[0134] In addition, such as Figure 17 As shown, when removing material from the functional layer, a mask can be used to cover the display layer 13 to expose the area where the material needs to be removed. The mask can be a metal mask or other dielectric material; this application does not limit the specific material of the mask.

[0135] like Figure 15 As shown, in step S4, a second electrode 14 can be fabricated on the surface of the completed display layer 13 away from the pixel defining layer 11. The second electrode 14 can be fabricated using processes such as vapor deposition. During the fabrication of the second electrode 14, the material used to form the second electrode 14 fills the interlayer gap 131a. Since the thickness of the display layer 13 is generally small, the discontinuity formed by the interlayer gap 131a is small, ensuring the continuity of the second electrode 14.

[0136] It should be noted that, as Figure 16 and Figure 16 As shown, in steps S2 and S3 above, the tomographic gap 131a is prepared after all functional layers of display layer 13 are prepared.

[0137] In other examples, at least one functional layer in the display layer 13 may be prepared first, and then at least a portion of the material in the prepared at least one functional layer may be removed using a removal process to prepare the tomographic gap. Then, at least one other functional layer in the display layer 13 may be prepared. After this, the tomographic gap may not need to be prepared again. Alternatively, at least a portion of the material in the prepared at least one functional layer of the display layer may be removed again to prepare the tomographic gap once more.

[0138] In other words, the tomographic gap can be prepared after any of the functional layers in the display layer 13. That is, the tomographic gap can be prepared either after preparing one of the functional layers in the display layer 13 or before preparing the second electrode 14.

[0139] The width, depth, and position of the fault gaps in any functional layer can be set in the same or similar manner as in the example of display layer 13 described above. Furthermore, the projection relationships between multiple functional layers can also be set in the same or similar manner as in the example of display layer 13 described above, and will not be elaborated upon here.

[0140] In some examples, after creating a gap in any functional layer, insulating material can be filled into the gap to form an insulating filler. The insulating material can be filled using processes such as vapor deposition or spraying. It should also be noted that, for example... Figure 18 As shown, a mask is used to cover the functional layer when preparing the fault gap 131a. After the fault gap 131a is prepared and it is necessary to fill the fault gap 131a with insulating material, the mask can be retained so that the insulating material can be well filled in the fault gap and prevent the insulating material from covering the area outside the fault gap 131a.

[0141] The insulating material can be filled into the gaps in at least one functional layer. Furthermore, the material and filling thickness of the insulating material can be set in the same or similar manner as the insulating filler 17 described above, and will not be elaborated further here.

[0142] Additionally, it should be noted that other steps or processes can also be used when manufacturing the display panel 10.

[0143] In one example, the display panel 10 described above, and the display panel 10 prepared by the method described above, can be applied to a variety of different display devices. Specifically, the display device can be a mobile phone, tablet computer, smartwatch, smart bracelet, monitor, television, or other device with display function requirements.

[0144] For example, such as ​ As shown, in one example provided in this application, the display device 20 is specifically a mobile phone. The display device 20 includes a housing 21 and a display panel 10. The display panel 10 is disposed on the surface of the housing 21 and is used to realize the display function of the display device 20.

[0145] Alternatively, in some examples, the display device 20 may also include a touch panel for human-computer interaction. The touch panel and the display panel 10 may be stacked. Or, it can be understood that in some examples, the display panel 10 may include a touch panel, so that the display panel 10 can simultaneously have display and touch functions.

[0146] The touch panel can be a commonly used type, such as a capacitive touch panel.

[0147] In addition, in some examples, the display device 20 may also be a foldable device, and this application does not limit the specific type of the display device 20.

[0148] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0149] In this application, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural.

[0150] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A display panel, characterized in that, include: A pixel-defining layer having multiple pixel openings that extend through its thickness; Multiple first electrodes are provided, and each of the multiple first electrodes corresponds to one of the multiple pixel openings. The first electrode is located within the pixel opening it corresponds to. A display layer is located on the second side of the pixel defining layer, and the display layer covers each pixel opening and the corresponding first electrode; Wherein, at least one functional layer in the display layer has a tomographic gap between at least two adjacent pixel openings; The second electrode is located on the surface of the display layer opposite to the pixel defining layer.

2. The display panel according to claim 1, characterized in that, The distance between two adjacent pixel openings is L, and the distance between the tomographic gap and at least one adjacent pixel opening is L1; Among them, L1 / L is less than 50%.

3. The display panel according to claim 1 or 2, characterized in that, The distance between two adjacent pixel openings is L, and the width of the tomographic gap is L2; Among them, L2 / L is greater than or equal to 5% and less than 100%.

4. The display panel according to any one of claims 1 to 3, characterized in that, The multiple functional layers in the display layer have tomographic gaps; The projections of the multiple tomographic gaps along the thickness direction of the display layer all coincide.

5. The display panel according to any one of claims 1 to 3, characterized in that, The multiple functional layers in the display layer have tomographic gaps; The projections of the multiple tomographic gaps along the thickness direction of the display layer do not overlap.

6. The display panel according to any one of claims 1 to 3, characterized in that, The multiple functional layers in the display layer have tomographic gaps; At least two tomographic gaps have overlapping or non-overlapping regions when projected along the thickness direction of the display layer.

7. The display panel according to any one of claims 1 to 6, characterized in that, The display layer also includes an insulating filler that fills the fracture gap of at least one functional layer.

8. The display panel according to claim 7, characterized in that, The thickness of the insulating filler within the fault gap is the same as the depth of the fault gap.

9. The display panel according to any one of claims 1 to 8, characterized in that, Between two adjacent pixel openings, the surface of the display layer facing the cathode is a flat surface.

10. The display panel according to any one of claims 1 to 9, characterized in that, The second side of the pixel-defining layer has a flat surface between two adjacent pixel openings.

11. The display panel according to any one of claims 1 to 10, characterized in that, The first electrode is the anode, and the second electrode is the cathode.

12. The display panel according to any one of claims 1 to 11, characterized in that, The display layer includes a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer stacked sequentially from the first electrode to the second electrode. The tomographic gap is present in at least one of the hole injection layer, the hole transport layer, the electron blocking layer, the light emitting layer, the hole blocking layer, the electron transport layer, and the electron injection layer.

13. The display panel according to any one of claims 1 to 11, characterized in that, The display layer includes a first sub-display layer, a charge generation layer, and a second sub-display layer, which are stacked sequentially from the first electrode to the second electrode. The first sub-display layer includes a first hole injection layer, a first hole transport layer, a first electron blocking layer, a first light-emitting layer, a first hole blocking layer, and a first electron transport layer, which are stacked sequentially from the first electrode to the second electrode. The second sub-display layer includes a second hole transport layer, a second electron blocking layer, a second light-emitting layer, a second hole blocking layer, a second electron transport layer, and a second electron injection layer, which are stacked sequentially from the second electrode to the second electrode. The tomographic gap is present in at least one of the functional layers of the first sub-display layer, the charge generation layer, and the second sub-display layer.

14. The display panel according to claim 13, characterized in that, The charge generation layer is a single-layer structure or a multi-layer structure, and at least one layer of the charge generation layer has the fault gap.

15. The display panel according to any one of claims 1 to 14, characterized in that, The display panel also includes a driving circuit layer; The driving circuit layer is located on the side of the plurality of first electrodes away from the pixel defining layer; The driving circuit in the driving circuit layer is connected to the plurality of first electrodes and is used to control the voltage of the plurality of first electrodes respectively.

16. The display panel according to claim 15, characterized in that, The display panel also includes a substrate. The substrate is located on the side of the driving circuit layer away from the plurality of first electrodes.

17. A method for manufacturing a display panel, characterized in that, include: A pixel defining layer is provided, wherein the pixel defining layer has a plurality of pixel openings extending through its thickness; At least one functional layer in the display layer is prepared on the first side of the pixel-defining layer; At least a portion of the material in at least one of the prepared functional layers is removed using a removal process to create a fracture gap; The tomographic gap is located between at least two adjacent pixel openings; A second electrode is prepared on the surface of the completed display layer that is opposite to the pixel defining layer.

18. The method according to claim 17, characterized in that, After removing at least a portion of the material from at least one of the prepared functional layers and before completing the fabrication of the display layer, the method further includes: Prepare at least one functional layer in the display layer.

19. The method according to claim 18, characterized in that, After preparing at least one functional layer in the display layer, the process further includes: At least a portion of the material in at least one of the functional layers of the prepared display layer is removed to re-prepare the tomographic gap.

20. The method according to any one of claims 17 to 19, characterized in that, After preparing the fault gap, the method further includes: Insulating material is filled into the fracture gap.

21. The method according to any one of claims 17 to 20, characterized in that, The removal process includes at least one of laser ablation or inductively coupled plasma etching.

22. A display device, characterized in that, It includes the display panel as described in any one of claims 1 to 16, or it includes the display panel manufactured using the preparation method as described in any one of claims 17 to 21.

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