Display panel and display terminal

Abstract

The application discloses a display panel and a display terminal. The display panel comprises an anode layer, a pixel definition layer, an isolation structure, a light-emitting functional layer and a cathode layer. The isolation structure comprises an auxiliary cathode and an isolation layer. The side wall of the auxiliary cathode is recessed inward relative to the side wall of the isolation layer to form a groove. The cathode layer comprises a plurality of cathodes. The cathodes cover the light-emitting functional layer and extend into the groove to contact the auxiliary cathode. The pixel definition layer comprises a first barrier wall and a second barrier wall. Since the thickness of the first color sublayer is greater than the thickness of the second color sublayer, the thickness of the first barrier wall is set to be greater than the thickness of the second barrier wall, so that the cathode corresponding to the first color sublayer can contact the auxiliary cathode on the first barrier wall, and the cathode corresponding to the second color sublayer can contact the auxiliary cathode on the second barrier wall, thereby realizing normal contact between the cathode and the auxiliary cathode and improving the problem of abnormal electrical connection between the cathode and the auxiliary cathode caused by the different thicknesses of the light-emitting functional layer.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display terminal. Background Art

[0002] OLED (Organic Light-Emitting Diode) display technology is a new display technology that has gradually attracted people's attention with its unique advantages such as low power consumption, high saturation, fast response time and wide viewing angle, and occupies a certain position in the field of panel display technology.

[0003] An OLED's light-emitting unit consists of a stacked anode, a light-emitting functional layer, and a cathode. The cathode film is relatively thin and has a high impedance. To reduce the cathode's impedance, an auxiliary cathode is typically added and connected in parallel with the cathode. Because the light-emitting functional layers of different colored sub-pixels in an OLED have different thicknesses, while the pixel-defining layer has the same thickness, a light-emitting functional layer that is too thick or too thin can lead to abnormal overlap between the cathode and the auxiliary cathode.

[0004] Therefore, it is urgent to solve the above technical problems. Summary of the Invention

[0005] The present application provides a display panel and a display terminal to improve the technical problem of abnormal overlap between the cathode and the auxiliary cathode when the thicknesses of the light-emitting functional layers of sub-pixels of different colors are different.

[0006] To solve the above technical problems, the technical solutions provided by this application are as follows:

[0007] The present application provides a display panel, comprising:

[0008] substrate;

[0009] an anode layer, disposed on one side of the substrate, the anode layer comprising a plurality of anodes;

[0010] a pixel definition layer, disposed on a side of the anode layer facing away from the substrate, wherein a plurality of openings are provided on the pixel definition layer, and one opening corresponds to one anode;

[0011] an isolation structure disposed on a side of the pixel definition layer facing away from the substrate, wherein an orthographic projection of the isolation structure on the pixel definition layer is located within the pixel definition layer, the isolation structure comprising an auxiliary cathode and an isolation layer, the isolation layer being disposed on a side of the auxiliary cathode facing away from the substrate, and a sidewall of the auxiliary cathode being concave relative to a sidewall of the isolation layer to form a groove;

[0012] A light-emitting functional layer is disposed in the opening and covers the anode, the light-emitting functional layer comprises a first color sub-layer and a second color sub-layer disposed in different openings respectively, and the thickness of the first color sub-layer is greater than the thickness of the second color sub-layer;

[0013] A cathode layer covers the light-emitting functional layer, and the cathode layer comprises a plurality of cathodes, the cathodes extend into the recesses and are in contact with the auxiliary cathodes;

[0014] The pixel definition layer comprises a first barrier wall and a second barrier wall extending along a first direction, two ends of the first color sub-layer are adjacent to the first barrier wall and the second barrier wall respectively, and one end of the second color sub-layer adjacent to the first color sub-layer is adjacent to the second barrier wall, and the thickness of the first barrier wall is greater than the thickness of the second barrier wall.

[0015] In the display panel of the present application, the cathode comprises a first sub-part and a second sub-part, the first sub-part covers the first color sub-layer, and the second sub-part covers the second color sub-layer;

[0016] The first sub-part is electrically connected to at least the auxiliary cathode corresponding to the first barrier wall, and the second sub-part is electrically connected to at least the auxiliary cathode corresponding to the second barrier wall.

[0017] In the display panel of the present application, the contact area of the first sub-part and the auxiliary cathode corresponding to the first barrier wall is greater than the contact area of the first sub-part and the auxiliary cathode corresponding to the second barrier wall, and / or the thickness of one end of the first sub-part close to the first barrier wall is greater than the thickness of one end of the first sub-part close to the second barrier wall.

[0018] In the display panel of the present application, the thickness of the first barrier wall is greater than or equal to the thickness of the first color sub-layer, the distance between the side surface of the first barrier wall away from the substrate and the side surface of the first color sub-layer away from the substrate is a first distance, and the first distance is less than or equal to the average thickness of the first sub-part;

[0019] The distance between the side surface of the second barrier wall away from the substrate and the side surface of the anode away from the substrate is a second distance, and the second distance is less than or equal to the average thickness of the second sub-part.

[0020] In the display panel of the present application, the maximum thickness of the first sub-part and the maximum thickness of the second sub-part are both less than the thickness of the auxiliary cathode, and the thickness of any auxiliary cathode is equal.

[0021] In the display panel provided by the application, a metal trace layer is further arranged between the substrate and the pixel definition layer, and the auxiliary cathode is electrically connected to the metal trace layer through a via hole.

[0022] In the display panel provided by the application, the first color sub-layer is a green light-emitting layer, and the second color sub-layer is a blue light-emitting layer.

[0023] In the display panel provided by the application, the display panel comprises an auxiliary encapsulation layer, the auxiliary encapsulation layer comprises a plurality of spaced auxiliary encapsulation portions, and the auxiliary encapsulation portions cover the cathode and the inner wall of the groove corresponding to the cathode.

[0024] In the display panel provided by the application, the light-emitting functional layer comprises a third color sub-layer, the first color sub-layer, the second color sub-layer and the third color sub-layer are arranged in different openings, the thickness of the third color sub-layer is greater than the thickness of the first color sub-layer, the pixel definition layer comprises a third barrier wall extending along a first direction, one end of the third color sub-layer is adjacent to the first barrier wall, and the other end of the third color sub-layer is adjacent to the third barrier wall, and the thickness of the third barrier wall is greater than or equal to the thickness of the first barrier wall.

[0025] The application further provides a display terminal, characterized by comprising the display panel.

[0026] Beneficial effects: The application discloses a display panel and a display terminal. The application provides a display panel, which comprises a substrate, an anode layer, a pixel definition layer, an isolation structure, a light-emitting functional layer, and a cathode layer. The anode layer is arranged on one side of the substrate and comprises a plurality of anodes. The pixel definition layer is arranged on the side of the anode layer away from the substrate, and a plurality of openings are arranged on the pixel definition layer, with one opening corresponding to one anode. The isolation structure is arranged on the side of the pixel definition layer away from the substrate, and the orthographic projection of the isolation structure on the pixel definition layer is located in the pixel definition layer. The isolation structure comprises an auxiliary cathode and an isolation layer, and the isolation layer is arranged on the side of the auxiliary cathode away from the substrate. The side wall of the auxiliary cathode is recessed relative to the side wall of the isolation layer to form a groove. The light-emitting functional layer is arranged in the openings and covers the anodes. The light-emitting functional layer comprises a first color sublayer and a second color sublayer arranged in different openings respectively, and the thickness of the first color sublayer is greater than that of the second color sublayer. The cathode layer covers the light-emitting functional layer and comprises a plurality of cathodes. The cathodes extend into the groove and are in contact with the auxiliary cathode. The pixel definition layer comprises a first barrier wall and a second barrier wall extending along a first direction. The two ends of the first color sublayer are adjacent to the first barrier wall and the second barrier wall respectively, and the end of the second color sublayer close to the first color sublayer is adjacent to the second barrier wall. The thickness of the first barrier wall is greater than that of the second barrier wall. Since the thickness of the first color sublayer is greater than that of the second color sublayer, the thickness of the first barrier wall adjacent to the first color sublayer is set to be greater than that of the second barrier wall adjacent to the second color sublayer, so that the cathode corresponding to the first color sublayer can be in contact with the auxiliary cathode on the first barrier wall, and the cathode corresponding to the second color sublayer can be in contact with the auxiliary cathode on the second barrier wall, thereby realizing normal contact between the cathode and the auxiliary cathode and improving the problem of abnormal electrical connection between the cathode and the auxiliary cathode caused by the different thicknesses of the first color sublayer and the second color sublayer. BRIEF DESCRIPTION OF DRAWINGS

[0027] The technical solutions and other beneficial effects of the application will become apparent from the following detailed description of the application, taken in conjunction with the accompanying drawings.

[0028] Figure 1 A top view structural schematic diagram of a display panel is provided for the embodiments of the application.

[0029] Figure 2 A sectional view structural schematic diagram of C-C in Figure 1

[0030] Figure 3 An enlarged schematic diagram of the local structure of D in Figure 2 ​​

[0031] Explanation of reference signs:

[0032] Substrate 10, thin film transistor 90, display area AA, non-display area NA, pixel definition layer 20, opening 24, first barrier wall 21, second barrier wall 22, third barrier wall 23, thickness d1 of first barrier wall 21, thickness d2 of second barrier wall 22, thickness d3 of third barrier wall 23, light-emitting functional layer 30, first color sub-layer 31, second color sub-layer 32, third color sub-layer 33, isolation structure 40, auxiliary cathode 41, isolation layer 42, cathode layer 50, cathode 51, first sub-part 511, second sub-part 512, third sub-part 513, anode layer 60, anode 61, metal trace layer 70, auxiliary encapsulation layer 80, auxiliary encapsulation part 81, first spacing s1, second spacing s2, third spacing s3, first direction D1, second direction D2. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0034] The present application provides a display panel, such as Figures 1 to 3As shown, the display panel comprises a substrate 10, an anode layer 60, a pixel definition layer 20, a separation structure 40, a light-emitting functional layer 30, and a cathode layer 50. The anode layer 60 is arranged on one side of the substrate 10 and comprises a plurality of anodes 61. The pixel definition layer 20 is arranged on the side of the anode layer 60 away from the substrate 10 and is provided with a plurality of openings 24. One opening 24 corresponds to one anode 61. The separation structure 40 is arranged on the side of the pixel definition layer 20 away from the substrate 10. The orthographic projection of the separation structure 40 on the pixel definition layer 20 is located in the pixel definition layer 20. The separation structure 40 comprises an auxiliary cathode 41 and a separation layer 42. The separation layer 42 is arranged on the side of the auxiliary cathode 41 away from the substrate 10. The side wall of the auxiliary cathode 41 is recessed relative to the side wall of the separation layer 42 to form a groove. The light-emitting functional layer 30 is arranged in the openings 24 and covers the anodes 61. The light-emitting functional layer 30 comprises a first color sublayer 31 and a second color sublayer 32 arranged in different openings 24. The thickness of the first color sublayer 31 is greater than that of the second color sublayer 32. The cathode layer 50 covers the light-emitting functional layer 30 and comprises a plurality of cathodes 51. The cathodes 51 extend into the grooves and are in contact with the auxiliary cathodes 41. The pixel definition layer 20 comprises a first barrier wall 21 and a second barrier wall 22 extending along a first direction D1. The two ends of the first color sublayer 31 are adjacent to the first barrier wall 21 and the second barrier wall 22, respectively. The end of the second color sublayer 32 close to the first color sublayer 31 is adjacent to the second barrier wall 22. The thickness d1 of the first barrier wall 21 is greater than the thickness d2 of the second barrier wall 22.

[0035] In this embodiment, the display panel can be an OLED panel, a Mini-LED panel, a Micro-LED panel, or the like.

[0036] In this embodiment, the substrate 10 can be a flexible substrate or a rigid substrate. The material of the flexible substrate can be polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyarylate, or glass fiber reinforced plastic. The material of the rigid substrate can be glass or the like.

[0037] In this embodiment, the substrate 10 is further provided with a driving circuit. The driving circuit comprises a plurality of thin film transistors 90 for driving the light-emitting units to emit light.

[0038] In the embodiment, the pixel definition layer 20 is disposed on the substrate 10, the pixel definition layer 20 comprises a plurality of openings 24, and the light-emitting functional layer 30 is disposed in the openings 24. The display panel comprises a display area AA and a non-display area NA disposed at the periphery of the display area AA. The display area AA is provided with a plurality of sub-pixels, and one sub-pixel is correspondingly disposed with one opening 24. The opening 24 is provided with an anode 61, the light-emitting functional layer 30 and a cathode 51 which are sequentially stacked, the anode 61 injects holes, the cathode 51 injects electrons, and the holes and the electrons recombine in the light-emitting functional layer 30 to emit light.

[0039] In the embodiment, the light-emitting functional layer 30 can comprise a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and the like which are stacked.

[0040] The pixel definition layer 20 comprises a first barrier wall 21 and a second barrier wall 22 which extend along the first direction D1. It should be noted that the first barrier wall 21 extending along the first direction D1 means that the extension trend of the whole first barrier wall 21 is the first direction D1, and does not mean that the boundary line of the first barrier wall 21 must be a straight line. For example, when the opening 24 is rectangular, the first barrier wall 21 extends along the first direction D1, and when the opening 24 is circular or other shapes, the first barrier wall 21 still extends along the first direction D1. The second barrier wall 22 is similarly provided.

[0041] The first color sub-layer 31 and the second color sub-layer 32 are respectively disposed in different openings 24, and the first color sub-layer 31 and the second color sub-layer 32 can be arranged along the second direction D2.

[0042] The first direction D1 and the second direction D2 are different, and the first direction D1 and the second direction D2 can be arranged at an included angle, which can be an acute angle, a right angle or an obtuse angle.

[0043] In the second direction D2, one end of the second barrier wall 22 is adjacent to the first color sub-layer 31, and the other end is adjacent to the second color sub-layer 32, the first barrier wall 21 is disposed at one end of the first color sub-layer 31 away from the second barrier wall 22, and the first barrier wall 21 is adjacent to the first color sub-layer 31.

[0044] It should be noted that adjacent means contacting in the direction parallel to the plane of the substrate 10.

[0045] In the embodiment, the orthogonal projection of the isolation structure 40 on the pixel definition layer 20 is located in the pixel definition layer 20, that is, the orthogonal projection of the isolation structure 40 on the pixel definition layer 20 does not exceed the pixel definition layer 20.

[0046] In the direction parallel to the substrate 10, the edge of the isolation layer 42 protrudes the edge of the auxiliary cathode 41, and the profile of the auxiliary cathode 41 in the direction parallel to the substrate 10 is recessed relative to the profile of the isolation layer 42 in the direction parallel to the substrate 10, i.e., the isolation layer 42 and the auxiliary cathode 41 form an undercut structure.

[0047] The material of the isolation layer 42 can be an inorganic material, for example, the isolation layer 42 can be a stack of silicon nitride and silicon oxide.

[0048] By providing the isolation structure 40, the light-emitting functional layers 30 can be separated, and the patterning of the light-emitting functional layers 30 can be achieved by using photolithography technology without using FMM (Fine Metal Mask). On the one hand, the pattern shape of the light-emitting functional layers 30 can be freely designed, and on the other hand, the FMM can be omitted. Since the FMM is expensive, omitting the FMM can significantly reduce the manufacturing cost of the display panel.

[0049] In the present embodiment, the thickness refers to the size in the direction perpendicular to the plane of the substrate 10. The thickness d1 of the first barrier wall 21 is greater than the thickness d2 of the second barrier wall 22. The thickness d1 of the first barrier wall 21 can be 0.25 microns to 0.33 microns. For example, the thickness d1 of the first barrier wall 21 can be 0.26 microns, 0.27 microns, 0.28 microns, 0.29 microns, 0.3 microns, 0.31 microns, 0.32 microns, or 0.33 microns. The thickness d2 of the second barrier wall 22 can be 0.15 microns to 0.23 microns. For example, the thickness d2 of the second barrier wall 22 can be 0.15 microns, 0.16 microns, 0.17 microns, 0.18 microns, 0.19 microns, 0.20 microns, 0.21 microns, 0.22 microns, or 0.23 microns.

[0050] The pixel definition layer 20 can be made by using a half-tone mask or a gray-tone mask, thereby not increasing the number of masks and saving the manufacturing cost.

[0051] In the display panel of the present application, the display panel can include an auxiliary encapsulation layer 80, and the auxiliary encapsulation layer 80 includes a plurality of spaced auxiliary encapsulation portions 81, and the auxiliary encapsulation portions 81 cover the cathode 51 and the inner wall of the groove corresponding to the cathode 51.

[0052] In the display panel of the present application, as Figure 2 and Figure 3As shown, the cathode 51 includes a first sub-part 511 and a second sub-part 512, the first sub-part 511 covers the first color sub-layer 31, and the second sub-part 512 covers the second color sub-layer 32; wherein the first sub-part 511 is electrically connected with the auxiliary cathode 41 corresponding to the first barrier wall 21; and the second sub-part 512 is electrically connected with the auxiliary cathode 41 corresponding to the second barrier wall 22.

[0053] In the embodiment, the cathode 51 can be made by a vapor deposition process. By adjusting the vapor deposition angle of the mask, the first sub-part 511 can be electrically connected with the auxiliary cathode 41 corresponding to the first barrier wall 21. Specifically, when the vapor deposition angle of the mask is inclined towards the side of the first barrier wall 21, more metal material is deposited on the side close to the first barrier wall 21, thereby ensuring that the first sub-part 511 is electrically connected with the auxiliary cathode 41 corresponding to the first barrier wall 21. Similarly, more metal material is deposited on the side close to the second barrier wall 22, and the second sub-part 512 is electrically connected with the auxiliary cathode 41 corresponding to the second barrier wall 22.

[0054] Through the above arrangement, the contact area of the cathode 51 and the auxiliary cathode 41 can be increased, and the connection reliability of the cathode 51 and the auxiliary cathode 41 can be improved.

[0055] In the display panel of the present application, the contact area of the first sub-part 511 and the auxiliary cathode 41 corresponding to the first barrier wall 21 is greater than the contact area of the first sub-part 511 and the auxiliary cathode 41 corresponding to the second barrier wall 22; and / or, the thickness of the end of the first sub-part 511 close to the first barrier wall 21 is greater than the thickness of the end of the first sub-part 511 close to the second barrier wall 22.

[0056] In the embodiment, the first sub-part 511 is partially deposited in the groove corresponding to the first barrier wall 21, and the contact area of the first sub-part 511 and the auxiliary cathode 41 corresponding to the first barrier wall 21 is greater than the contact area of the first sub-part 511 and the auxiliary cathode 41 corresponding to the second barrier wall 22.

[0057] The second sub-part 512 is partially deposited in the groove corresponding to the second barrier wall 22, and the contact area of the second sub-part 512 and the auxiliary cathode 41 corresponding to the second barrier wall 22 is greater than the contact area of the second sub-part 512 and the auxiliary cathode 41 corresponding to the auxiliary cathode 41 of the other barrier wall.

[0058] In the display panel of the present application, as shown in Figure 2 and Figure 3As shown, the thickness d1 of the first barrier wall 21 is greater than or equal to the thickness of the first color sub-layer 31, and the distance between the side surface of the first barrier wall 21 facing away from the substrate 10 and the side surface of the first color sub-layer 31 facing away from the substrate 10 is a first distance s1, which is less than or equal to the average thickness of the first sub-portion 511. The distance between the side surface of the second barrier wall 22 facing away from the substrate 10 and the side surface of the anode 61 facing away from the substrate 10 is a second distance s2, which is less than or equal to the average thickness of the second sub-portion 512.

[0059] In the present embodiment, the thickness d1 of the first barrier wall 21 is greater than or equal to the thickness of the first color sub-layer 31, so that the first color sub-layer 31 does not exceed the pixel definition layer 20, and the leakage caused by the connection between the first color sub-layer 31 and the auxiliary cathode 41 is avoided.

[0060] The thickness of the first color sub-layer 31 can be 0.2 microns to 0.23 microns. For example, the thickness of the first color sub-layer 31 can be 0.2 microns, 0.21 microns, 0.22 microns, or 0.23 microns.

[0061] In the present embodiment, the thickness d2 of the second barrier wall 22 is greater than or equal to the thickness of the second color sub-layer 32, so that the second color sub-layer 32 does not exceed the pixel definition layer 20, and the leakage caused by the connection between the second color sub-layer 32 and the auxiliary cathode 41 is avoided.

[0062] The thickness of the second color sub-layer 32 can be 0.14 microns to 0.17 microns. For example, the thickness of the second color sub-layer 32 can be 0.14 microns, 0.15 microns, 0.16 microns, or 0.17 microns.

[0063] It should be understood that due to the limitation of process accuracy, the thickness of the pixel definition layer 20 or the thickness of the light-emitting functional layer 30 can deviate. For example, the deviation can be within a range of plus or minus 0.02 microns. Therefore, when the thickness of the first color sub-layer 31 is within 0.02 microns of the thickness d1 of the first barrier wall 21, it should still be considered that the thickness d1 of the first barrier wall 21 is greater than or equal to the thickness of the first color sub-layer 31. Alternatively, when the thickness of the second color sub-layer 32 is within 0.02 microns of the thickness d2 of the second barrier wall 22, it should still be considered that the thickness d2 of the second barrier wall 22 is greater than or equal to the thickness of the second color sub-layer 32.

[0064] In the display panel of the present application, the maximum thickness of the first sub-portion 511 and the maximum thickness of the second sub-portion 512 are both less than the thickness of the auxiliary cathode 41, and the thickness of any auxiliary cathode 41 is equal. Through the above arrangement, the first sub-portion 511 cannot completely fill the groove, and the second sub-portion 512 cannot completely fill the groove, so that the groove can realize the disconnection of the auxiliary encapsulation layer 80.

[0065] In the present embodiment, the maximum thickness of the first sub-portion 511 is the thickness of the first sub-portion 511 close to the groove at which the first sub-portion 511 is electrically connected to the auxiliary cathode 41. The maximum thickness of the second sub-portion 512 is the thickness of the second sub-portion 512 close to the groove at which the second sub-portion 512 is electrically connected to the auxiliary cathode 41.

[0066] In the present embodiment, the thickness of the auxiliary cathode 41 can be a uniform thickness without considering the process precision, and the thickness of the plurality of auxiliary cathodes 41 is the same.

[0067] In the display panel of the present application, as shown in Figure 2 and Figure 3 , a metal wiring layer 70 is further arranged between the substrate 10 and the pixel definition layer 20, and the auxiliary cathode 41 is electrically connected to the metal wiring layer 70 through a via. Since the cathode 51 corresponding to each opening 24 is arranged to be disconnected, in order to facilitate inputting of a voltage signal to each cathode 51, the auxiliary cathode 41 can be electrically connected to the metal wiring layer 70, and the metal wiring layer 70 can be electrically connected to a signal input terminal, so as to input the voltage signal to the cathode 51 through the metal wiring layer 70.

[0068] In the display panel of the present application, the first color sub-layer 31 is a green light-emitting layer, and the second color sub-layer 32 is a blue light-emitting layer.

[0069] In the display panel of the present application, as shown in Figure 2 and Figure 3 , the light-emitting functional layer 30 includes a third color sub-layer 33, the first color sub-layer 31, the second color sub-layer 32, and the third color sub-layer 33 are arranged in different openings 24, the thickness of the third color sub-layer 33 is greater than the thickness of the first color sub-layer 31, the pixel definition layer 20 includes a third barrier wall 23 extending along the first direction D1, one end of the third color sub-layer 33 is adjacent to the first barrier wall 21, and the other end of the third color sub-layer 33 is adjacent to the third barrier wall 23, and the thickness d3 of the third barrier wall 23 is greater than or equal to the thickness d1 of the first barrier wall 21.

[0070] In the present embodiment, the third color sub-layer 33 can be a red light-emitting layer, and the thickness of the third color sub-layer 33 can be 0.27 microns to 0.3 microns. For example, the thickness of the third color sub-layer 33 can be 0.27 microns, 0.28 microns, 0.29 microns, or 0.3 microns.

[0071] The cathode 51 includes a third sub-portion 513, the third sub-portion 513 covers the third color sub-layer 33, and the third sub-portion 513 is electrically connected to the auxiliary cathode 41 corresponding to the third barrier wall 23.

[0072] In the embodiment, the third barrier wall 23 is arranged on the side of the third color sub-layer 33 away from the first barrier wall 21. That is, one end of the third color sub-layer 33 is adjacent to the third barrier wall 23, and the other end is adjacent to the first barrier wall 21.

[0073] In the embodiment, the thickness d3 of the third barrier wall 23 is greater than or equal to the thickness d1 of the first barrier wall 21. The thickness d3 of the third barrier wall 23 can be 0.3 microns to 0.4 microns. The distance between the side surface of the third barrier wall 23 away from the substrate 10 and the side surface of the third color sub-layer 33 away from the substrate 10 is a third distance s3, and the third distance s3 is less than or equal to the average thickness of the third sub-section 513. The thickness d3 of the third barrier wall 23 can be greater than or equal to the thickness of the third color sub-layer 33.

[0074] In the embodiment, the contact area of the auxiliary cathode 41 corresponding to the third sub-section 513 and the third barrier wall 23 is greater than the contact area of the auxiliary cathode 41 corresponding to the third sub-section 513 and the first barrier wall 21; and / or, the thickness of the end of the third sub-section 513 close to the third barrier wall 23 is greater than the thickness of the end of the third sub-section 513 close to the first barrier wall 21.

[0075] The application also provides a display terminal, which comprises the display panel described above.

[0076] In the embodiment, the display terminal can be any product or component with display function, such as mobile phone, tablet computer, television, display, notebook computer, digital photo frame, navigator, etc.

[0077] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0078] The display panel and display terminal provided by the embodiments of the application are described in detail above, and the principles and implementation manners of the application are described by applying specific examples; the above embodiment descriptions are only used to help understand the technical solutions and core ideas of the application; those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A display panel, characterized in that: include: substrate; an anode layer, disposed on one side of the substrate, the anode layer comprising a plurality of anodes; a pixel definition layer, disposed on a side of the anode layer facing away from the substrate, wherein a plurality of openings are provided on the pixel definition layer, and one opening corresponds to one anode; an isolation structure disposed on a side of the pixel definition layer facing away from the substrate, wherein an orthographic projection of the isolation structure on the pixel definition layer is located within the pixel definition layer, the isolation structure comprising an auxiliary cathode and an isolation layer, the isolation layer being disposed on a side of the auxiliary cathode facing away from the substrate, and a sidewall of the auxiliary cathode being concave relative to a sidewall of the isolation layer to form a groove; a light-emitting functional layer, disposed in the opening and covering the anode, the light-emitting functional layer comprising a first color sublayer and a second color sublayer respectively disposed in different openings, the first color sublayer being thicker than the second color sublayer; a cathode layer, covering the light-emitting functional layer, the cathode layer comprising a plurality of cathodes, the cathodes extending into the grooves and contacting the auxiliary cathodes; In which, the pixel definition layer includes a first retaining wall and a second retaining wall extending along a first direction, the two ends of the first color sublayer are adjacent to the first retaining wall and the second retaining wall respectively, and the end of the second color sublayer close to the first color sublayer is adjacent to the second retaining wall, and the thickness of the first retaining wall is greater than the thickness of the second retaining wall.

2. The display panel according to claim 1, wherein: The cathode includes a first sub-section and a second sub-section, the first sub-section covers the first color sub-layer, and the second sub-section covers the second color sub-layer; The first sub-portion is at least electrically connected to the auxiliary cathode corresponding to the first retaining wall; and the second sub-portion is at least electrically connected to the auxiliary cathode corresponding to the second retaining wall.

3. The display panel according to claim 2, wherein: The contact area between the first sub-section and the auxiliary cathode corresponding to the first retaining wall is greater than the contact area between the first sub-section and the auxiliary cathode corresponding to the second retaining wall; and / or the thickness of the first sub-section at one end close to the first retaining wall is greater than the thickness of the first sub-section at one end close to the second retaining wall.

4. The display panel according to claim 2, wherein: The thickness of the first retaining wall is greater than or equal to the thickness of the first color sub-layer, and a first distance is defined between a surface of the first retaining wall facing away from the substrate and a surface of the first color sub-layer facing away from the substrate, and the first distance is less than or equal to an average thickness of the first sub-portion; A second distance is defined between a surface of the second retaining wall facing away from the substrate and a surface of the anode facing away from the substrate. The second distance is less than or equal to an average thickness of the second sub-portion.

5. The display panel according to claim 2, wherein: The maximum thickness of the first sub-portion and the maximum thickness of the second sub-portion are both smaller than the thickness of the auxiliary cathode, and the thicknesses of any of the auxiliary cathodes are equal.

6. The display panel according to claim 1, wherein: A metal wiring layer is further provided between the substrate and the pixel definition layer, and the auxiliary cathode is electrically connected to the metal wiring layer through a via hole.

7. The display panel according to claim 1, wherein: The first color sub-layer is a green light-emitting layer, and the second color sub-layer is a blue light-emitting layer.

8. The display panel according to claim 1, wherein: The display panel includes an auxiliary encapsulation layer, wherein the auxiliary encapsulation layer includes a plurality of spaced-apart auxiliary encapsulation parts, and the auxiliary encapsulation parts cover the cathode and inner walls of the grooves corresponding to the cathode.

9. The display panel according to any one of claims 1 to 8, characterized in that: The light-emitting functional layer includes a third color sublayer, the first color sublayer, the second color sublayer and the third color sublayer are all arranged in different openings, the thickness of the third color sublayer is greater than the thickness of the first color sublayer, and the pixel definition layer includes a third blocking wall extending along the first direction, one end of the third color sublayer is adjacent to the first blocking wall, and the other end is adjacent to the third blocking wall, and the thickness of the third blocking wall is greater than or equal to the thickness of the first blocking wall.

10. A display terminal, characterized in that: The display terminal includes the display panel according to any one of claims 1 to 9.

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