Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel is provided with a display area, and in the display area, the display panel comprises an array substrate which comprises a wiring part; the first electrode part is arranged on one side of the array substrate, the first conductive part is electrically connected with the wiring part, and the first electrode part and the first conductive part are arranged on the same layer and are arranged at intervals; the pixel definition layer is arranged on the sides, away from the array substrate, of the first electrode part and the first conductive part, the pixel definition layer is provided with a first opening and a second opening, the first opening corresponds to the first electrode part, and the second opening corresponds to the first conductive part; the light-emitting part is positioned at the first opening; the second electrode layer is arranged on the pixel defining layer and the light-emitting part in a stacked mode, and the second electrode layer is electrically connected with the first conductive part through the second opening. The display uniformity of the display panel can be improved.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, and desktop computers due to their advantages of high image quality, power saving, thin body, and wide application range, becoming the mainstream of display devices. However, the performance of current OLED display products needs to be improved. Summary of the invention

[0003] Based on this, the present application provides a display panel and a display device, which are used to improve the display uniformity of the display panel.

[0004] A display panel comprises: a display area and a non-display area adjacent to the display area; in the display area, the display panel comprises:

[0005] An array substrate, comprising a wiring portion;

[0006] A first electrode portion disposed on one side of the array substrate and a first conductive portion electrically connected to the wiring portion, the first electrode portion and the first conductive portion being in the same layer and spaced apart;

[0007] A pixel definition layer disposed on a side of the first electrode portion and the first conductive portion away from the array substrate, the pixel definition layer having a first opening and a second opening, the first opening corresponding to the first electrode portion, and the second opening corresponding to the first conductive portion;

[0008] a light emitting portion located at the first opening;

[0009] A second electrode layer is stacked on the pixel definition layer and the light-emitting portion, and the second electrode layer is electrically connected to the first conductive portion through the second opening.

[0010] In one embodiment, a direction perpendicular to the array substrate is taken as the first direction;

[0011] The display panel further includes a supporting structure, wherein the supporting structure has a first end surface and a second end surface opposite to each other along a first direction, wherein the first end surface is located on a side of the second end surface away from the array substrate; an orthographic projection of the supporting structure on the array substrate overlaps with an orthographic projection of the second opening on the array substrate;

[0012] Along the first direction, the second opening has a top opening and a bottom opening, and the bottom opening exposes at least a portion of the surface of the first conductive portion;

[0013] The second electrode layer includes a first sub-portion covering the pixel definition layer and the light-emitting portion, and the first sub-portion is electrically connected to the first conductive portion through the second opening.

[0014] In one embodiment, the second end surface contacts the first conductive portion, and the support structure extends out of the second opening; the width of the second end surface of the support structure in the second direction is smaller than the width of the bottom opening of the second opening in the second direction; the second direction is perpendicular to the first direction;

[0015] The support structure also has a first side wall connecting the first end face and the second end face, a gap is formed between the first side wall and the inner wall of the second opening, and the first sub-portion extends into the gap between the support structure and the second opening and overlaps with the first conductive portion.

[0016] In one of the embodiments, the width of the first end surface of the supporting structure in the second direction is greater than or equal to the width of the top opening of the second opening in the second direction; the orthographic projection of the top opening of the second opening on the array substrate is located within the orthographic projection of the first end surface of the supporting structure on the array substrate.

[0017] In one embodiment, the width of the second end surface of the support structure in the second direction is smaller than the width of the bottom opening of the second opening in the second direction;

[0018] Optionally, the width of the support structure in the second direction gradually decreases from the first end surface to the second end surface;

[0019] Optionally, a cross-sectional shape of the support structure on a plane formed by the first direction and the second direction is an inverted trapezoid.

[0020] In one embodiment, the display panel further includes a second conductive portion disposed at the second opening, wherein along the first direction, the second conductive portion has a third end surface and a fourth end surface opposite to each other, the third end surface contacts the second end surface of the support structure, and the fourth end surface overlaps the first conductive portion;

[0021] The second conductive portion further has a second side wall connecting the third end surface and the fourth end surface, and the first sub-portion overlaps at least a portion of the second side wall of the second conductive portion;

[0022] Along the first direction, a projection area of ​​the second end surface of the support structure on the array substrate is greater than or equal to a projection area of ​​the third end surface of the second conductive portion on the array substrate;

[0023] Optionally, the width of the second end surface of the support structure in the second direction is greater than or equal to the maximum width of the second conductive portion in the second direction; the second direction is perpendicular to the first direction;

[0024] Optionally, a width of the first end surface of the support structure in the second direction is smaller than a width of the second end surface in the second direction;

[0025] Optionally, the width of the support structure in the second direction gradually increases from the first end surface to the second end surface;

[0026] Optionally, a cross-sectional shape of the support structure on a plane formed by the first direction and the second direction is a regular trapezoid.

[0027] In one embodiment, the width of the fourth end surface of the second conductive portion in the second direction is smaller than the width of the bottom opening of the second opening in the second direction;

[0028] There is a gap between the second side wall of the second conductive part and the inner wall of the second opening, and the first sub-part extends into the gap between the second conductive part and the second opening, and overlaps with the second side wall of the second conductive part and the first conductive part respectively;

[0029] Optionally, a width of the third end surface of the second conductive portion in the second direction is smaller than a width of the fourth end surface of the second conductive portion in the second direction;

[0030] Optionally, from the third end surface to the fourth end surface, the width of the second conductive portion in the second direction gradually increases;

[0031] Optionally, a cross-sectional shape of the second conductive portion on a plane formed by the first direction and the second direction is a regular trapezoid.

[0032] In one embodiment, a height of the second conductive portion in the first direction is greater than a distance from a top opening to a bottom opening of the second opening in the first direction;

[0033] The maximum width of the second conductive portion in the second direction is greater than the width of the top opening of the second opening in the second direction; the first sub-portion overlaps the second side wall of the second conductive portion;

[0034] Optionally, the second conductive portion includes a third sub-portion and a fourth sub-portion, the third sub-portion is located outside the second opening, and the fourth sub-portion is located inside the second opening; along the first direction, the projection area of ​​the third sub-portion on the array substrate is larger than the projection area of ​​the top opening of the second opening on the array substrate; the first sub-portion overlaps the third sub-portion.

[0035] In one embodiment, the display panel includes a plurality of first electrode portions and a plurality of first conductive portions arranged on one side of the array substrate, the first electrode portions and the first conductive portions are arranged in the same layer, and the first conductive portions are located between at least some of the adjacent first electrode portions;

[0036] Optionally, the first electrode portion is an anode, the second electrode layer is a cathode, and the wiring portion is used to transmit a cathode power supply signal.

[0037] A display device comprises the display panel described in the above embodiment.

[0038] In the above-mentioned display panel and display device, the first conductive portion is electrically connected to the wiring portion in the array substrate, and the second electrode layer can be electrically connected to the first conductive portion through the second opening, so that the second electrode layer can be electrically connected to the wiring portion in the array substrate through the first conductive portion, thereby realizing signal transmission in the display area, shortening the signal transmission path of the second electrode layer in the display area, reducing the resistance of the second electrode layer in the display area, thereby reducing the voltage drop of the second electrode layer in the display area, and improving the display uniformity of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application.

[0040] Figure 2 A schematic diagram of a partial top view structure of a display area of ​​a display panel provided in an embodiment of the present application.

[0041] Figure 3 A partial top view structural diagram of a display area of ​​another display panel provided in an embodiment of the present application.

[0042] Figure 4 A schematic diagram of a partial cross-sectional structure of a display area of ​​a display panel provided in an embodiment of the present application.

[0043] Figure 5 for Figure 4 A partial enlarged view of .

[0044] Figure 6 A schematic diagram of a partial cross-sectional structure of a display area of ​​another display panel provided in an embodiment of the present application.

[0045] Figure 7 for Figure 6 A partial enlarged view of .

[0046] Figure 8 A schematic diagram of a partial cross-sectional structure of a display area of ​​another display panel provided in an embodiment of the present application.

[0047] Fig. 9 for Figure 8 A partial enlarged view of .

[0048] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0050] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0055] In the related art, the cathode is deposited at a specified position through an evaporation process. The square resistance of the cathode material is large, and the thickness formed by evaporation is also relatively thin, resulting in a large voltage drop, which is prone to uneven display problems for large-size display panels.

[0056] Currently, there are designs that reduce the cathode voltage drop by overlapping the cathode with the metal in the frame area by thickening and widening it or by increasing the cathode thickness. However, the former has a more obvious effect on reducing the cathode voltage drop in the non-display area, but has little effect on reducing the cathode voltage drop in the display area. The latter will affect the transmittance and luminous efficiency, etc.

[0057] Based on this, the present application provides a display panel and a display device, which are used to improve the display uniformity of the display panel.

[0058] The following is a detailed description with reference to the accompanying drawings and specific embodiments.

[0059] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application. Figure 2 A schematic diagram of a partial top view structure of a display area of ​​a display panel provided in an embodiment of the present application. Figure 3 A partial top view structural diagram of a display area of ​​another display panel provided in an embodiment of the present application. Figure 4 A schematic diagram of a partial cross-sectional structure of a display area of ​​a display panel provided in an embodiment of the present application. Figure 5 for Figure 4 A partial enlarged view of . Figure 6A schematic diagram of a partial cross-sectional structure of a display area of ​​another display panel provided in an embodiment of the present application. Figure 7 for Figure 6 A partial enlarged view of . Figure 8 A schematic diagram of a partial cross-sectional structure of a display area of ​​another display panel provided in an embodiment of the present application. Fig. 9 for Figure 8 A partial enlarged view of .

[0060] See also Figure 1 to Figure 9 An embodiment of the present application provides a display panel, including: a display area AA and a non-display area NA adjacent to the display area AA; in the display area AA, the display panel includes:

[0061] The array substrate 10 includes a wiring portion 101;

[0062] A first electrode portion 20 disposed on one side of the array substrate 10 and a first conductive portion 21 electrically connected to the wiring portion 101, the first electrode portion 20 and the first conductive portion 21 being in the same layer and spaced apart;

[0063] A pixel definition layer 30 disposed on a side of the first electrode portion 20 and the first conductive portion 21 away from the array substrate 10, the pixel definition layer 30 having a first opening 31 and a second opening 32, the first opening 31 corresponding to the first electrode portion 20, and the second opening 32 corresponding to the first conductive portion 21;

[0064] a light emitting portion 40 located at the first opening 31;

[0065] The second electrode layer 60 is stacked on the pixel definition layer 30 and the light emitting portion 40 , and the second electrode layer 60 is electrically connected to the first conductive portion 21 through the second opening 32 .

[0066] See also Figure 1 , the second electrode layer 60 in the display panel covers a portion of the display area AA and the non-display area NA.

[0067] Exemplarily, the display panel is an organic light emitting diode (OLED) display panel.

[0068] The array substrate includes a plurality of thin film transistors and capacitors located in the display area, the thin film transistors include a gate, an active layer, a source electrode and a drain electrode, and the capacitors include an upper plate and a lower plate.

[0069] Among them, the first electrode portion 20, the light-emitting portion 40 and the second electrode layer 60 stacked in sequence at the first opening can be used as the most basic light-emitting unit in the display panel. If a voltage is applied between the first electrode portion 20 and the second electrode layer 60, the light-emitting portion 40 can emit visible light, thereby realizing an image that can be recognized by the user. In order to achieve light emission, the first electrode portion 20 can be electrically connected to the drain of the thin film transistor in the array substrate through a contact hole. The pixel definition layer 30 covers the edge of the first electrode portion 20, and the pixel definition layer 30 can be formed of one or more organic materials such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin or phenolic resin. The light-emitting portion 40 can be formed by vacuum evaporation technology, and the light-emitting portion 40 may include an organic light-emitting layer, and may also include at least one of a hole injection layer, a hole transport layer, an electron transport layer and an electron injection layer.

[0070] Combination Figure 1 to Figure 9 It can be known from the composition structure of the above display panel that the array substrate 10 also includes a wiring portion 101, and a first conductive portion 21 which is in the same layer as the first electrode portion 20 and is spaced apart is also provided in the display area AA of the display panel, and the first conductive portion 21 is electrically connected to the wiring portion 101 in the array substrate 10; a second opening 32 corresponding to the first conductive portion 21 is provided on the pixel definition layer 30, so that the second electrode layer 60 can be electrically connected to the first conductive portion 21 through the second opening 32, and then the second electrode layer 60 can be electrically connected to the wiring portion 101 in the array substrate 10 through the first conductive portion 21, so that the second electrode layer 60 can realize signal transmission through the first conductive portion 21 and the wiring portion 101 in the array substrate 10 in the display area AA, shortening the signal transmission path of the second electrode layer 60 in the display area AA, reducing the resistance of the second electrode layer 60 in the display area, thereby reducing the voltage drop of the second electrode layer 60 in the display area AA, and improving the display uniformity of the display panel.

[0071] At the same time, combined Figure 2~Figure 9 Since the first electrode portion 20 and the first conductive portion 21 are in the same layer and are spaced apart, the corresponding second opening 32 on the pixel definition layer 30 is also spaced apart from the first opening 31, while improving the display uniformity of the display panel, it is not necessary to occupy the light-emitting area of ​​the display panel, simplifying the manufacturing process of the display panel; and the second electrode layer 60 is electrically connected to the first conductive portion 21 through the second opening 32, which is conducive to reducing the thickness of the display panel and realizing a thin display panel. In addition, the wiring portion 101 in the array substrate 10 has a low impedance, which is conducive to further reducing the voltage drop of the second electrode layer 60 in the display area AA.

[0072] Exemplarily, the material of the first conductive part 21 may be the same as that of the first electrode part 20 , which is helpful to simplify the manufacturing process of the display panel.

[0073] For some examples, see Figure 4~Figure 9 , with the direction perpendicular to the array substrate 10 as the first direction A;

[0074] The display panel further includes a support structure 50. Along a first direction A, the support structure 50 has a first end surface 51 and a second end surface 52 opposite to each other. The first end surface 51 is located on a side of the second end surface 52 away from the array substrate 10. The orthographic projection of the support structure 50 on the array substrate 10 overlaps with the orthographic projection of the second opening 32 on the array substrate 10.

[0075] Along the first direction A, the second opening 32 has a top opening and a bottom opening, and the bottom opening exposes at least a portion of the surface of the first conductive portion 21;

[0076] The second electrode layer 60 includes a first sub-portion 61 covering the pixel definition layer 30 and the light emitting portion 40 . The first sub-portion 61 is electrically connected to the first conductive portion 21 through the second opening 32 .

[0077] The support structure 50 (spacer, SPC) is mainly used to support the mask used in the vapor deposition of the light-emitting portion.

[0078] Specifically, Figure 4~Figure 9 As shown, along the first direction A, the support structure 50 is arranged at the second opening 32 in the form of the first end surface 51 facing away from the second opening 32 and the second end surface 52 facing the second opening 32. The first sub-portion 61 of the second electrode layer 60 covers the pixel definition layer 30 and the light-emitting layer. In the first direction A, the second opening 32 has a top opening and a bottom opening. The bottom opening can expose at least part of the surface of the corresponding first conductive portion 21, so that the first sub-portion 61 of the second electrode layer 60 can contact the first conductive portion 21 through the bottom opening of the second opening 32, thereby realizing the electrical connection between the second electrode layer 60 and the first conductive portion 21, and further, the second electrode layer 60 can realize the electrical connection with the wiring portion 101 in the array substrate 10 through the first conductive portion 21, shortening the signal transmission path of the second electrode layer 60 in the display area AA, thereby reducing the voltage drop of the second electrode layer 60 in the display area, and improving the display uniformity of the display panel.

[0079] As a possible implementation, see Figure 4~Figure 9 , the second end surface 52 contacts the first conductive portion 21, and the support structure 50 extends out of the second opening 32; the width of the second end surface 52 of the support structure 50 in the second direction B is smaller than the width of the bottom opening of the second opening 32 in the second direction B; the second direction B is perpendicular to the first direction A;

[0080] The support structure 50 also has a first side wall 53 connecting the first end face 51 and the second end face 52 . There is a gap between the first side wall 53 and the inner wall of the second opening 32 . The first sub-portion 61 extends into the gap between the support structure 50 and the second opening 32 and overlaps with the first conductive portion 21 .

[0081] like Figure 4~Figure 5 As shown, at this time, the support structure 50 can be arranged inside the second opening 32, and the second end surface 52 is in contact with the first conductive portion 21 exposed by the bottom opening of the second opening 32, which is conducive to further reducing the thickness of the display panel and realizing further thinning of the display panel. In the second opening 32, there is a gap between the first side wall 53 of the support structure 50 and the inner wall of the second opening 32. When forming the second electrode layer 60, the first sub-portion 61 of the second electrode layer 60 can extend into the gap between the support structure 50 and the second opening 32, so that the first sub-portion 61 can overlap with the first conductive portion 21, realizing the electrical connection between the second electrode layer 60 and the first conductive portion 21, and then the second electrode layer 60 can realize the electrical connection with the wiring portion 101 in the array substrate 10 through the first conductive portion 21, reducing the voltage drop of the second electrode layer 60 in the display area, and further improving the display uniformity of the display panel.

[0082] Furthermore, the second electrode layer 60 can be evaporated using conventional evaporation equipment and evaporation methods. Since the evaporation source has a certain evaporation angle during actual evaporation, when evaporating the second electrode layer 60, part of the evaporation gas emitted to the vicinity of the second opening 32 will be deposited in the gap between the second opening 32 and the support structure 50 due to the shadow effect, thereby achieving the overlap of the first sub-portion 61 of the second electrode layer 60 and the first conductive portion 21.

[0083] In some examples, such as Figure 4~Figure 9 As shown, the second electrode layer 60 is a whole layer evaporated, and also includes a second sub-portion 62 located on the first end surface 51 of the support structure 50 .

[0084] For some examples, see Figure 4~Figure 5 , the width of the first end surface 51 of the supporting structure 50 in the second direction B is greater than or equal to the width of the top opening of the second opening 32 in the second direction B; the orthographic projection of the top opening of the second opening 32 on the array substrate 10 is located within the orthographic projection of the first end surface 51 of the supporting structure 50 on the array substrate 10.

[0085] Based on this, Figure 4~Figure 5As shown, along the first direction A, the orthographic projection of the first end surface 51 of the supporting structure 50 on the array substrate 10 can completely cover the orthographic projection of the first conductive portion 21 exposed in the second opening 32 on the array substrate 10, so that when the light-emitting portion 40 is formed by evaporation, the evaporation gas will at most be deposited on the first end surface 51 of the supporting structure 50, and will not fall on the first conductive portion 21 exposed in the second opening 32, thereby avoiding the light-emitting portion 40 from being deposited on the first conductive portion 21, thereby avoiding the occurrence of a short circuit, ensuring an effective electrical connection between the second electrode layer 60 and the first conductive portion 21, and further ensuring an effective electrical connection between the second electrode layer 60 and the wiring portion 101 in the array substrate 10 through the first conductive portion 21, thereby effectively improving the display uniformity of the display panel.

[0086] Furthermore, vertical evaporation equipment can be used to evaporate the material of the light-emitting portion 40, improve the shadow effect during the evaporation process, and limit the boundary position of the light-emitting portion 40 formed by evaporation, thereby further avoiding the light-emitting portion 40 from being deposited on the first conductive portion 21 exposed in the second opening 32, thereby further ensuring the effective electrical connection between the second electrode layer 60 and the first conductive portion 21, and further ensuring the effective electrical connection between the second electrode layer 60 and the wiring portion 101 in the array substrate 10 through the first conductive portion 21, thereby effectively improving the display uniformity of the display panel.

[0087] For some examples, see Figure 5 The width of the second end surface 52 of the supporting structure 50 in the second direction B is smaller than the width of the bottom opening of the second opening 32 in the second direction B.

[0088] Specifically, Figure 5 As shown, the width of the second end surface 52 of the support structure 50 in the second direction B is smaller than the width of the first conductive portion 21 exposed by the bottom opening of the second opening 32. Based on this, after the support structure 50 is formed, the first sub-portion 61 of the second electrode layer 60 can still overlap with the portion of the first conductive portion 21 exposed by the bottom opening of the second opening 32, so that the second electrode layer 60 is electrically connected to the wiring portion 101 in the array substrate 10 through the first conductive portion 21, which effectively improves the display uniformity of the display panel.

[0089] At the same time, if Figure 5As shown, since the width of the first end surface 51 of the support structure 50 in the second direction B is greater than or equal to the width of the bottom opening of the second opening 32 in the second direction B, the width of the second end surface 52 of the support structure 50 in the second direction B is smaller than the width of the first end surface 51 in the second direction B. At this time, along the direction from the first end surface 51 to the second end surface 52, the width variation trend of the support structure 50 in the second direction B is at least partially a variation trend from large to small, which is conducive to the deposition of the second electrode layer 60 in the gap between the support structure 50 and the second opening 32, and the effective overlap between the second electrode layer 60 and the first conductive portion 21 is achieved, which is conducive to further improving the display uniformity of the display panel.

[0090] See also Figure 4 and Figure 5 Optionally, the width of the support structure 50 in the second direction B gradually decreases from the first end surface 51 to the second end surface 52;

[0091] Optionally, a cross-sectional shape of the support structure 50 on a plane formed by the first direction A and the second direction B is an inverted trapezoid.

[0092] Based on this, Figure 4 and Figure 5 As shown, along the direction from the first end face 51 to the second end face 52, the width change trend of the support structure 50 in the second direction B is an overall change trend from large to small, which matches the emission direction of the evaporation gas when evaporating the second electrode layer 60, and is beneficial for the first sub-portion 61 of the second electrode layer 60 formed by evaporation to extend into the gap between the support structure 50 and the second opening 32, thereby realizing effective overlap between the second electrode layer 60 and the first conductive portion 21, and is beneficial for further improving the display uniformity of the display panel.

[0093] Illustratively, in the above embodiments, the embodiments of the present application do not limit the width of the first end face 51 of the support structure 50 in the second direction B and the width of the top opening of the second opening 32 in the second direction B. For example, the width of the first end face 51 of the support structure 50 in the second direction B may be greater than the width of the top opening of the second opening 32 in the second direction B, or the width of the first end face 51 of the support structure 50 in the second direction B may be equal to the width of the top opening of the second opening 32 in the second direction B, or the width of the first end face 51 of the support structure 50 in the second direction B may be less than the width of the top opening of the second opening 32 in the second direction B, which is beneficial to the overlap of the second electrode layer 60 and the first conductive portion 21.

[0094] For example, in the embodiment of the present application, the width of the top opening of the second opening 32 in the second direction B may be slightly larger, so as to expose the first conductive portion 21 for overlapping and facilitate actual manufacturing.

[0095] As a possible implementation, see Figure 6~Figure 9 The display panel further includes a second conductive portion 70 disposed at the second opening 32. Along the first direction A, the second conductive portion 70 has a third end surface 71 and a fourth end surface 72 opposite to each other. The third end surface 71 contacts the second end surface 52 of the support structure 50, and the fourth end surface 72 overlaps the first conductive portion 21.

[0096] The second conductive portion 70 further includes a second side wall 73 connecting the third end surface 71 and the fourth end surface 72 , and the first sub-portion 61 overlaps at least a portion of the second side wall 73 of the second conductive portion 70 .

[0097] Specifically, in another embodiment, Figure 6~Figure 9 As shown, a second conductive portion 70 can also be provided at the second opening 32, and the fourth end surface 72 of the second conductive portion 70 overlaps with the first conductive portion 21 exposed by the bottom opening of the second opening 32, and the first sub-portion 61 of the second electrode layer 60 overlaps with at least part of the second side wall 73 of the second conductive portion 70 to achieve electrical connection with the first conductive portion 21, thereby achieving electrical connection between the second electrode layer 60 and the wiring portion 101 in the array substrate 10, shortening the signal transmission path of the second electrode layer 60 in the display area AA, reducing the resistance of the second electrode layer 60 in the display area, thereby reducing the voltage drop of the second electrode layer 60 in the display area, and improving the display uniformity of the display panel. At this time, the support structure 50 can be provided on the third end surface 71 of the second conductive portion 70 to protect the second conductive portion 70 and prevent the evaporated light-emitting portion 40 material from being deposited on the second conductive portion 70.

[0098] In some embodiments, see Figure 6~Figure 9 , along the first direction A, the projection area of ​​the second end surface 52 of the support structure 50 on the array substrate 10 is greater than or equal to the projection area of ​​the third end surface 71 of the second conductive portion 70 on the array substrate 10;

[0099] Optionally, the width of the second end surface 52 of the support structure 50 in the second direction B is greater than or equal to the maximum width of the second conductive portion 70 in the second direction B; the second direction B is perpendicular to the first direction A.

[0100] Based on this, Figure 6~Figure 9As shown, in an embodiment in which the second conductive portion 70 is provided, along the first direction A, the orthographic projection of the second end surface 52 of the supporting structure 50 on the array substrate 10 can completely cover the second conductive portion 70 provided at the second opening 32, so that when the light-emitting portion 40 is formed by evaporation, the evaporation gas will not be deposited on the second conductive portion 70, thereby avoiding the occurrence of a short circuit phenomenon, ensuring an effective electrical connection between the second electrode layer 60 and the first conductive portion 21, and further ensuring an effective electrical connection between the second electrode layer 60 and the wiring portion 101 in the array substrate 10 through the first conductive portion 21, thereby effectively improving the display uniformity of the display panel.

[0101] For some examples, see Figure 6~Figure 9 Optionally, the width of the first end surface 51 of the supporting structure 50 in the second direction B is smaller than the width of the second end surface 52 in the second direction B.

[0102] Optionally, the width of the support structure 50 in the second direction B gradually increases from the first end surface 51 to the second end surface 52;

[0103] Optionally, a cross-sectional shape of the support structure 50 on a plane formed by the first direction A and the second direction B is a regular trapezoid.

[0104] Based on this, Figure 6~Figure 9 As shown, in an embodiment in which a second conductive portion 70 is provided, the overall shape of the support structure 50 can be the same as a conventional design, that is, a support structure 50 in the shape of a regular trapezoid, that is, along the direction from the first end face 51 to the second end face 52, the width change trend of the support structure 50 in the second direction B is an overall change trend from small to large, so that when manufacturing the support structure 50, there is no need to make major adjustments to the current process steps, and it is also beneficial to the subsequent setting of other structures.

[0105] For some examples, see Figure 6~Figure 7 , the width of the fourth end surface 72 of the second conductive portion 70 in the second direction B is smaller than the width of the bottom opening of the second opening 32 in the second direction B;

[0106] There is a gap between the second side wall 73 of the second conductive portion 70 and the inner wall of the second opening 32 . The first sub-portion 61 extends into the gap between the second conductive portion 70 and the second opening 32 and overlaps the second side wall 73 of the second conductive portion 70 and the first conductive portion 21 , respectively.

[0107] At this time, if Figure 6~Figure 7As shown, the second conductive part 70 can be arranged inside the second opening 32, and along the first direction A, the projection of the fourth end face 72 of the second conductive part 70 at the bottom opening of the second opening 32 will not completely cover the first conductive part 21 exposed by the second opening 32, so that the fourth end face 72 of the second conductive part 70 can expose part of the first conductive part 21 while contacting with the first conductive part 21, so that there is a gap between the second side wall 73 of the second conductive part 70 and the inner wall of the second opening 32, and the first sub-portion 61 of the second electrode layer 60 can extend into the gap between the second conductive part 70 and the second opening 32, so that the second electrode layer 60 is overlapped with the second conductive part 70 and the first conductive part 21 respectively, thereby realizing the electrical connection between the second electrode layer 60 and the wiring part 101 in the array substrate 10, reducing the voltage drop of the second electrode layer 60 in the display area, and further improving the display uniformity of the display panel.

[0108] Exemplarily, in an embodiment in which the second conductive portion 70 is provided, the light emitting portion 40 is also evaporated by a vertical evaporation device, and the second electrode layer 60 can also be evaporated by a conventional evaporation device and evaporation method. When the width of the fourth end face 72 of the second conductive portion 70 in the second direction B is smaller than the width of the bottom opening of the second opening 32 in the second direction B, part of the light emitting portion 40 material evaporated vertically may be emitted into the gap between the second opening 32 and the second conductive portion 70, and deposited on the surface of the part of the first conductive portion 21 exposed by the bottom opening of the second opening 32. At this time, due to the provision of the second conductive portion 70, the first sub-portion 61 of the second electrode layer 60 can be electrically connected to the first conductive portion 21 and the wiring portion 101 in the array substrate 10 through the second conductive portion 70, which effectively improves the display uniformity of the display panel.

[0109] Alternatively, if Figure 7 As shown, the width of the third end face 71 of the second conductive portion 70 in the second direction B is smaller than the width of the fourth end face 72 of the second conductive portion 70 in the second direction B. Based on this, along the direction from the third end face 71 to the fourth end face 72, the width variation trend of the second conductive portion 70 in the second direction B is at least partially a variation trend from small to large, which is conducive to the deposition of the second electrode layer 60 in the gap between the second conductive portion 70 and the second opening 32, and realizes the effective overlap of the second electrode layer 60 with the second conductive portion 70 and the first conductive portion 21, which is conducive to further improving the display uniformity of the display panel.

[0110] like Figure 7 As shown, optionally, from the third end surface 71 to the fourth end surface 72, the width of the second conductive portion 70 in the second direction B gradually increases;

[0111] Optionally, a cross-sectional shape of the second conductive portion 70 on a plane formed by the first direction A and the second direction B is a regular trapezoid.

[0112] Based on this, Figure 7 As shown, along the direction from the third end face 71 to the fourth end face 72, the width change trend of the second conductive part 70 in the second direction B is an overall change trend from small to large, which is not only conducive to the deposition of the second electrode layer 60 into the gap between the second conductive part 70 and the second opening 32, and realizes the effective overlap between the second electrode layer 60 and the second conductive part 70 and the first conductive part 21, but also increases the contact area between the second electrode layer 60 and the second conductive part 70, reduces the contact resistance, and is conducive to further reducing the voltage drop of the second electrode layer 60 in the display area, thereby further improving the uniformity of the display panel.

[0113] For some examples, see Figure 8 and Fig. 9 , the height of the second conductive portion 70 in the first direction A is greater than the distance from the top opening to the bottom opening of the second opening 32 in the first direction A;

[0114] The maximum width of the second conductive portion 70 in the second direction B is greater than the width of the top opening of the second opening 32 in the second direction B; the first sub-portion 61 overlaps with the second side wall 73 of the second conductive portion 70;

[0115] Optionally, the second conductive portion 70 includes a third sub-portion 701 and a fourth sub-portion 702, the third sub-portion 701 is located outside the second opening 32, and the fourth sub-portion 702 is located inside the second opening 32; along the first direction A, the projection area of ​​the third sub-portion 701 on the array substrate 10 is larger than the projection area of ​​the top opening of the second opening 32 on the array substrate 10; the first sub-portion 61 overlaps the third sub-portion 701.

[0116] At this time, if Figure 8 and Fig. 9 As shown, a portion of the second conductive portion 70 can be disposed inside the second opening 32, and another portion can be disposed outside the top opening of the second opening 32, and the portion disposed outside the second opening 32 can cover the top opening of the second opening 32, so that the second electrode layer 60 can overlap with the second side wall 73 of the second conductive portion 70 through the first sub-portion 61, thereby realizing electrical connection between the second electrode layer 60 and the first conductive portion 21, and further realizing electrical connection between the second electrode layer 60 and the wiring portion 101 in the array substrate 10, thereby reducing the voltage drop of the second electrode layer 60 in the display area, and further improving the display uniformity of the display panel.

[0117] Furthermore, if Figure 8 and Fig. 9As shown, along the direction from the third end face 71 to the fourth end face 72, the width of the third sub-portion 701 located outside the second opening 32 in the second direction B can be gradually increased, which is not only conducive to the deposition of the second electrode layer 60 into the gap between the supporting structure 50 and the second conductive portion 70, and realizes the effective overlap between the second electrode layer 60 and the second conductive portion 70, but also increases the contact area between the second electrode layer 60 and the second conductive portion 70, reduces the contact resistance, and is conducive to further reducing the voltage drop of the second electrode layer 60 in the display area, thereby further improving the uniformity of the display panel.

[0118] In some examples, along the first direction, the orthographic projection of the wiring portion 101 overlapping the first conductive portion 21 on the surface of the array substrate 10 may be a mesh or strip shape. In another embodiment, along the first direction, the orthographic projection of the first conductive portion 21 on the surface of the array substrate 10 may be a mesh or strip shape.

[0119] As a possible implementation, the array substrate 10 includes multiple different metal layers, and the routing portion 101 can be located at any metal layer in the array substrate 10; or, the routing portion 101 can include multiple electrically connected sub-portions, and different sub-portions are located at different metal layers in the array substrate 10.

[0120] In some examples, the first conductive portion 21 can be overlapped with a metal layer in the array substrate 10 that originally has other functions, and they can be shared as the routing portion 101 without changing the mask or adding a new process.

[0121] Exemplarily, the material of the routing portion 101 or the sub-portion included in the routing portion 101 can be the same as the material of the metal layer arranged in the same layer. For example, the routing portion 101 or the sub-portion included in the routing portion 101 can be arranged in the same layer as the gate of the thin film transistor in the array substrate 10, and / or, arranged in the same layer as the electrode plate of the capacitor. In this case, the material of the routing portion 101 or the sub-portion included in the routing portion 101 can be molybdenum; for another example, the material of the routing portion 101 or the sub-portion included in the routing portion 101 can be arranged in the same layer as the source and drain of the thin film transistor in the array substrate 10, and / or, arranged in the same layer as the metal power line. In this case, the material of the routing portion 101 or the sub-portion included in the routing portion 101 can be a laminated metal composed of titanium, aluminum, and titanium, which has lower impedance, which is conducive to further reducing the voltage drop of the second electrode layer 60 in the display area and further improving the display uniformity of the display panel.

[0122] Exemplarily, the first conductive part 21 and the second conductive part 70 can be made of at least one or more combinations of conductive materials such as molybdenum, aluminum, titanium, copper, silver, or indium tin oxide, which are only examples and are not specifically limited. Further, the first conductive part 21 and the second conductive part 70 can be made of conductive materials with lower resistivity, which can further reduce the voltage drop of the second electrode layer 60 in the display area.

[0123] For some examples, see Figure 2 and Figure 3 The display panel includes a plurality of first electrode portions 20 and a plurality of first conductive portions 21 arranged on one side of the array substrate 10 . The first electrode portions 20 and the first conductive portions 21 are arranged in the same layer, and the first conductive portions 21 are located between at least partially adjacent first electrode portions 20 .

[0124] Based on this, Figure 2 and Figure 3 As shown, when a plurality of first electrode portions 20 and first conductive portions 21 are provided on one side of the array substrate 10, the first electrode portions 20 and the first conductive portions 21 which are provided in the same layer and are spaced apart can be arranged such that the first conductive portion 21 is located between at least partially adjacent first electrode portions 20, and when the light-emitting portion 40 is subsequently formed by vapor deposition, the first conductive portion 21 can play a role of supporting the mask plate.

[0125] In some examples, optionally, the first electrode portion 20 is an anode, the second electrode layer 60 is a cathode, and the wiring portion 101 is used to transmit a cathode power supply signal. Based on this, in the display area, the cathode and the anode are arranged opposite to each other, the first conductive portion 21 and the anode are arranged in the same layer and spaced apart, and the cathode is electrically connected to the first conductive portion 21 through the second opening 32, thereby realizing electrical connection between the cathode and the wiring portion 101 in the array substrate 10, so that the cathode in the display area can transmit the cathode power supply signal through the first conductive portion 21 and the wiring portion 101 in the array substrate 10, shortening the signal transmission path of the cathode in the display area, reducing the cathode resistance in the display area, thereby reducing the voltage drop of the cathode in the display area, and improving the display uniformity of the display panel.

[0126] For some examples, see Figure 4 , Figure 6 and Figure 8 The display panel further includes an encapsulation layer 80 covering the second electrode layer 60 and the supporting structure 50 on a side away from the array substrate 10 .

[0127] For example, the encapsulation layer 80 may be a three-layer structure of an inorganic layer, an organic layer 82 and an inorganic layer. Figure 4 , Figure 6 and Figure 8 As shown, along the direction perpendicular to the array substrate 10, the encapsulation layer 80 may include a stacked first inorganic layer 81, an organic layer 82, and a second inorganic layer 83. The inorganic layer is formed by coating, and the organic layer is generally formed by inkjet printing. The organic layer has a smaller elastic modulus and relieves the bending stress. The inorganic layer mainly plays a role in blocking water and oxygen.

[0128] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0129] See also Fig.10 , an embodiment of the present application further provides a display device 1000 , comprising the display panel 100 described in any of the above embodiments.

[0130] Compared with the prior art, the beneficial effects of the display device are the same as the beneficial effects of the display panel described in any of the above embodiments, which will not be described in detail here.

[0131] The display device 1000 provided in the embodiment of the present application includes the display panel 100 provided in the above embodiment of the present application. Fig.10 The embodiment only takes a mobile phone as an example to illustrate the display device 1000. It can be understood that the display device 1000 provided in the embodiment of the present application can be a computer, a television, a car display device or other display device 1000 with a display function, and the embodiment of the present application does not make any specific restrictions on this.

[0132] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0133] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: a display area and a non-display area adjacent to the display area; In the display area, the display panel includes: An array substrate, comprising a wiring portion; A first electrode portion disposed on one side of the array substrate and a first conductive portion electrically connected to the wiring portion, wherein the first electrode portion and the first conductive portion are in the same layer and are spaced apart from each other; A pixel definition layer disposed on a side of the first electrode portion and the first conductive portion away from the array substrate, the pixel definition layer having a first opening and a second opening, the first opening corresponding to the first electrode portion, and the second opening corresponding to the first conductive portion; a light emitting portion located at the first opening; A second electrode layer is stacked on the pixel definition layer and the light-emitting portion, and the second electrode layer is electrically connected to the first conductive portion through the second opening.

2. The display panel according to claim 1, characterized in that: A direction perpendicular to the array substrate is defined as a first direction; The display panel further comprises a supporting structure, wherein along the first direction, the supporting structure has a first end surface and a second end surface opposite to each other, the first end surface being located on a side of the second end surface away from the array substrate; an orthographic projection of the supporting structure on the array substrate overlaps with an orthographic projection of the second opening on the array substrate; Along the first direction, the second opening has a top opening and a bottom opening, and the bottom opening exposes at least a portion of the surface of the first conductive portion; The second electrode layer includes a first sub-portion covering the pixel definition layer and the light-emitting portion, and the first sub-portion is electrically connected to the first conductive portion through the second opening.

3. The display panel according to claim 2, wherein the second end surface is in contact with the first conductive portion, and the support structure extends out of the second opening; the width of the second end surface of the support structure in the second direction is smaller than the width of the bottom opening of the second opening in the second direction; and the second direction is perpendicular to the first direction; The support structure also has a first side wall connecting the first end face and the second end face, a gap is formed between the first side wall and the inner wall of the second opening, and the first sub-portion extends into the gap between the support structure and the second opening and overlaps with the first conductive portion.

4. The display panel according to claim 3, characterized in that: The width of the first end surface of the supporting structure in the second direction is greater than or equal to the width of the top opening of the second opening in the second direction; the orthographic projection of the top opening of the second opening on the array substrate is located within the orthographic projection of the first end surface of the supporting structure on the array substrate.

5. The display panel according to claim 3, characterized in that: From the first end surface to the second end surface, the width of the support structure in the second direction gradually decreases; Optionally, a cross-sectional shape of the support structure on a plane formed by the first direction and the second direction is an inverted trapezoid.

6. The display panel according to claim 2, characterized in that: The display panel further includes a second conductive portion disposed at the second opening, wherein along the first direction, the second conductive portion has a third end surface and a fourth end surface opposite to each other, the third end surface contacts the second end surface of the support structure, and the fourth end surface overlaps the first conductive portion; The second conductive portion further has a second side wall connecting the third end surface and the fourth end surface, and the first sub-portion overlaps at least a portion of the second side wall of the second conductive portion; Along the first direction, a projection area of ​​the second end surface of the support structure on the array substrate is greater than or equal to a projection area of ​​the third end surface of the second conductive portion on the array substrate; Optionally, a width of the second end surface of the support structure in the second direction is greater than or equal to a maximum width of the second conductive portion in the second direction; The second direction is perpendicular to the first direction; Optionally, a width of the first end surface of the support structure in the second direction is smaller than a width of the second end surface in the second direction; Optionally, from the first end surface to the second end surface, the width of the support structure in the second direction gradually increases; Optionally, a cross-sectional shape of the support structure on a plane formed by the first direction and the second direction is a regular trapezoid.

7. The display panel according to claim 6, characterized in that: A width of the fourth end surface of the second conductive portion in the second direction is smaller than a width of the bottom opening of the second opening in the second direction; There is a gap between the second side wall of the second conductive portion and the inner wall of the second opening, and the first sub-portion extends into the gap between the second conductive portion and the second opening and overlaps the second side wall of the second conductive portion and the first conductive portion respectively; Optionally, a width of the third end surface of the second conductive portion in the second direction is smaller than a width of the fourth end surface of the second conductive portion in the second direction; Optionally, from the third end surface to the fourth end surface, the width of the second conductive portion in the second direction gradually increases; Optionally, a cross-sectional shape of the second conductive portion on a plane formed by the first direction and the second direction is a regular trapezoid.

8. The display panel according to claim 6, characterized in that: The height of the second conductive portion in the first direction is greater than the distance from the top opening to the bottom opening of the second opening in the first direction; The maximum width of the second conductive portion in the second direction is greater than the width of the top opening of the second opening in the second direction; the first sub-portion overlaps the second side wall of the second conductive portion; Optionally, the second conductive portion includes a third sub-portion and a fourth sub-portion, the third sub-portion is located outside the second opening, and the fourth sub-portion is located inside the second opening; along the first direction, a projection area of ​​the third sub-portion on the array substrate is larger than a projection area of ​​a top opening of the second opening on the array substrate; the first sub-portion overlaps the third sub-portion.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display panel comprises a plurality of first electrode portions and a plurality of first conductive portions arranged on one side of the array substrate, wherein the first electrode portions and the first conductive portions are arranged in the same layer, and the first conductive portions are located between at least some of the adjacent first electrode portions; Optionally, the first electrode portion is an anode, the second electrode layer is a cathode, and the wiring portion is used to transmit a cathode power supply signal.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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