Display panel and method of manufacturing the same, and display device

Abstract

The present disclosure provides a display panel, a method for manufacturing the same, and a display device. A display panel comprising a display area including a first display area and a second display area, wherein the pixel circuit distribution density in the first display area is smaller than the pixel circuit distribution density in the second display area; a base substrate; a plurality of first pixel circuits provided on one side of the base substrate and located within the second display area; a line provided on one side of the first pixel circuit located far from the base substrate; a first light-emitting element provided on one side of the line located far from the base substrate and located within the first display area, wherein the first anode comprises at least two layers of conductive layers, and the at least two layers of conductive layers comprise at least a first transparent electrode; and a connecting line located on the same layer as the first transparent electrode and electrically connected; wherein the line electrically connects the first pixel circuit and the connecting line so that the first pixel circuit drives the first light-emitting element to emit light.

Description

Technology Field

[0001] The present invention relates to the field of display technology, and specifically, to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] Currently, in order to increase the light transmittance of the high-transparency display area corresponding to the under-screen camera and secure the shooting effect of the under-screen camera, only light-emitting elements are left in the high-transparency display area, and a signal controlling the light-emitting elements to emit light is extracted by the pixel circuit in the non-high-transparency display area. However, the current shooting quality of the under-screen camera is still poor.

[0003] Therefore, research on display panels equipped with under-screen cameras is necessary. The problem to be solved

[0004] The present invention aims to solve at least one of the technical problems existing in the relevant technology to some extent. To this end, the present invention aims to provide a display panel in which a first display area has a high light transmittance and the shooting quality of an under-screen camera is improved. means of solving the problem

[0005] In one aspect of the present invention, the present invention provides a display panel, and according to an embodiment disclosed in the present invention, the display area of ​​the display panel includes a first display area and a second display area, wherein the pixel circuit density in the first display area is smaller than the pixel circuit density in the second display area; the display panel comprises: a base substrate; a plurality of first pixel circuits provided on one side of the base substrate and located within the second display area; a line provided on one side of the first pixel circuit located far from the base substrate; a first light-emitting element provided on one side of the line located far from the base substrate and located within the first display area, wherein the effective light-emitting anode area of ​​the first anode, in a direction far from the base substrate, comprises at least two layers of conductive layers, and the at least two layers of conductive layers comprise a first transparent electrode; and a connecting line located on the same layer as the first transparent electrode and electrically connected thereto, wherein the line electrically connects the first pixel circuit and the connecting line so that the first pixel circuit drives the first light-emitting element to emit light. Accordingly, so that an electrical connection between the first pixel circuit and the first light-emitting element is realized, a connecting line is drawn from the first transparent electrode of the first anode and electrically connected to the line, and thus, the first anode does not need to reinstall a protrusion for electrical connection to the line, and thus the light transmittance of the first display area can be further improved.

[0006] According to an embodiment of the present invention, the line is electrically connected to the connecting line through a first via hole, and the first via hole is located within the first display area.

[0007] According to an embodiment of the present invention, in a direction far from the base substrate, the first anode includes the first transparent electrode, the silver electrode, and the second transparent electrode which are stacked and installed in sequence, and the connecting line and the first transparent electrode have an integrated structure.

[0008] According to an embodiment of the present invention, the display panel further comprises: a first insulating layer provided on one side of the first pixel circuit far from the base substrate and having a penetrating second via hole, wherein the line is located on one side far from the base substrate and the line is electrically connected to the first pixel circuit through the second via hole; and a second insulating layer provided on one side of the first insulating layer far from the base substrate, covering the line and having the penetrating first via hole, wherein the connecting line is provided on one side far from the base substrate.

[0009] According to an embodiment of the present invention, a plurality of the first via holes are arranged in multiple rows, and the line is located between two adjacent rows of the first via holes.

[0010] According to an embodiment of the present invention, the first anode includes an effective emitting anode region and a non-emitting anode region provided surrounding the effective emitting anode region, and the orthographic projection of the effective emitting anode region on the base substrate is greater than or equal to the orthographic projection of an aperture defined by a pixel defining layer among the first emitting elements on the base substrate, the non-emitting anode region is covered by the pixel defining layer, and the non-emitting anode region includes only the first transparent electrode.

[0011] According to an embodiment of the present invention, the display area further includes an under-screen function area, and the under-screen function area and the first display area have an overlapping area.

[0012] According to an embodiment of the present invention, the display panel further comprises a plurality of second pixel circuits and a plurality of second light-emitting elements, wherein the second pixel circuits and the second light-emitting elements are all located within the second display area, and the method of connecting the second pixel circuit and the second positive electrode among the second light-emitting elements is at least one of the following: a method in which the second pixel circuit is electrically connected directly to the second positive electrode among the second light-emitting elements through a third via hole to drive the second light-emitting element to emit light; and a method in which the display panel further comprises a conductive layer, wherein the conductive layer is provided on the same layer as the line, the second positive electrode is electrically connected to the conductive layer through a fourth via hole penetrating the second insulating layer, and the conductive layer is electrically connected to the second pixel circuit through a fifth via hole penetrating the first insulating layer.

[0013] According to another aspect of the present invention, the present invention provides a method for manufacturing the aforementioned display panel. According to an embodiment of the present invention, the display area of ​​the display panel includes a first display area and a second display area, and the pixel circuit density in the first display area is smaller than the pixel circuit density in the second display area, and the method of manufacturing the display panel comprises: forming a plurality of first pixel circuits on one side of a base substrate so as to be located within the second display area; forming a line electrically connected to the first pixel circuit on one side of the first pixel circuit located far from the base substrate; forming a first light-emitting element and a connecting line on one side of the line located far from the base substrate, wherein the first light-emitting element is located within the first display area and, in a direction far from the base substrate, the effective light-emitting anode area of ​​the first anode among the first light-emitting elements includes at least two layers of conductive layers, and at least one of the at least two layers of conductive layers includes a first transparent electrode, and the connecting line is electrically connected to the first transparent electrode and formed through the same step, wherein the line and the connecting line are electrically connected so as to drive the first light-emitting element to emit light. Accordingly, so that an electrical connection between the first pixel circuit and the first light-emitting element is realized, a connecting line is drawn from the first transparent electrode of the first anode and electrically connected to the line, and thus, the first anode does not need to further install a protrusion for electrical connection to the line, and thus the light transmittance of the first display area can be further improved.

[0014] According to an embodiment of the present invention, the method for manufacturing the display panel comprises: a step of depositing a first insulating material layer on one side of the first pixel circuit located far from the base substrate to form the first insulating layer having the second via hole, and forming a second via hole penetrating the first insulating material layer in the first insulating material layer; and a step of depositing a second insulating material layer on one side of the first insulating layer located far from the base substrate to form the second insulating layer having the first via hole, and forming a first via hole penetrating the second insulating material layer in the second insulating material layer; wherein the line is located between the first insulating layer and the second insulating layer and is electrically connected to the first pixel circuit through the second via hole; and the connecting line is provided on one side of the second insulating layer located far from the base substrate and is electrically connected to the line through the first via hole.

[0015] According to an embodiment of the present invention, the step of forming the first anode and the connecting line comprises: a step of sequentially depositing and forming a first transparent conductive layer, a silver layer, and a second transparent conductive layer on the surface of the second insulating layer located far from the base substrate; a step of forming a first photoresist and a second photoresist, respectively, in a first region and a second region on the surface of the second transparent conductive layer, wherein the thickness of the first photoresist is thicker than the thickness of the second photoresist; a step of removing the first transparent conductive layer, the silver layer, and the second transparent conductive layer that are not covered by the first photoresist and the second photoresist; a step of performing ash processing on the first photoresist and the second photoresist to remove the second photoresist and thin the first photoresist; a step of removing the second transparent conductive layer and the silver layer at the second region point through an etching process, leaving the first transparent conductive layer, to obtain the connecting line; and the first photoresist after thinning The step of removing to obtain the first anode; is included.

[0016] In another aspect of the present invention, the present invention provides a display device. According to an embodiment of the present invention, the display device comprises: the aforementioned display panel, wherein the display area comprises a first display area and a second display area; and an under-screen functional layer having an overlapping area between the orthographic projection on the display panel and the first display area. Accordingly, the display device can satisfy the requirement for a high amount of light input of the under-screen functional layer. When the under-screen functional layer is an under-screen camera, the under-screen camera has a good amount of light input, thereby ensuring high image quality. Those skilled in the art will understand that the display device possesses all the features and advantages of the aforementioned display panel, which are not mentioned further herein. Brief explanation of the drawing

[0017] FIG. 1 is a schematic plan view of a display panel in one embodiment of the present invention. FIG. 2 is a schematic plan view of a display panel in another embodiment of the present invention. FIG. 3 is a schematic plan view of a partial structure of a display panel in another embodiment of the present invention. FIG. 4 is a schematic diagram of the structure of a display panel in another embodiment of the present invention. FIG. 5 is a schematic diagram of the structure of the first anode and the connecting line in another embodiment of the present invention. FIG. 6 is a schematic diagram of the structure of the first anode and the connecting line in another embodiment of the present invention. FIG. 7 is a schematic diagram of the structure of a first anode and a connecting line in another embodiment of the present invention, and FIG. 8 is a schematic diagram of the structure of a first anode of the prior art. FIG. 9 is a schematic diagram of a planar structure of a part structure of a display panel in another embodiment of the present invention. FIG. 10 is a schematic diagram of the structure of a display panel in another embodiment of the present invention. FIG. 11 is a schematic diagram of the structure of a display panel in another embodiment of the present invention. FIG. 12 is a schematic diagram of the structure of a display panel in another embodiment of the present invention. FIG. 13 is a schematic diagram of the structure of a display panel in another embodiment of the present invention. FIG. 14 is a schematic diagram of a structure for manufacturing a display panel in another embodiment of the present invention. FIG. 15 is a schematic diagram of the structure of the first anode and the connecting line in another embodiment of the present invention. Specific details for implementing the invention

[0018] The embodiments of the present invention are described in detail below. The embodiments described below are illustrative and are intended only to interpret the present invention and should not be understood as limiting the invention. Specific techniques or conditions not mentioned in the embodiments shall follow the techniques or conditions described in the literature of the art or product descriptions.

[0019] In one aspect of the present invention, the present invention provides a display panel. According to an embodiment of the present invention, with reference to FIG. 1, the display area of ​​the display panel includes a first display area (a) and a second display area (b). In some embodiments, the second display area (b) is provided at the outer edge of the first display area (a), that is, the second display area (b) is provided outside the first display area (a) or the second display area (b) is provided around the first display area (a). Furthermore, there are no specific requirements for the specific installation location of the first display area (a), and a person skilled in the art may flexibly select it according to actual design requirements for the under-screen functional area. For example, the second display area may be at the center of the display panel, at one corner of the display panel, or located in the center near the edge of the display panel as shown in FIG. 1.

[0020] In addition, there are no specific requirements for the specific shape of the first display area (a), and a person skilled in the art may flexibly select it according to actual circumstances. For example, the shape of the first display area (a) may include polygonal or irregular shapes such as a circle, ellipse, square, pentagon, or hexagon, but is not limited thereto.

[0021] Here, the pixel circuit density of the first display area is smaller than the pixel circuit density of the second display area, that is to say, the pixel circuit distribution density of the first display area is smaller than the pixel circuit distribution density of the second display area (i.e., corresponding to the first pixel circuit described below). It should be explained that the pixel circuit mentioned in the specification is a driving circuit that provides a driving voltage for an OLED light-emitting element, and may be a circuit such as 7T1C, 9T2C, etc.

[0022] Additionally, as illustrated in FIG. 1, the display area of ​​the display panel may further include a third display area (c) located on one side of a second display area (b) that is far from the first display area (a). Here, the pixel circuit density in the third display area may be greater than the pixel circuit density in the second display area. In some embodiments, the pixel circuit density in the first display area may be zero, that is, no pixel circuit may be provided in the first display area, and all first light-emitting elements located in the first display area are driven by the first pixel circuit in the second display area.

[0023] Additionally, the distribution density of light-emitting elements in the first display area (a) may be smaller than or equal to the distribution density of light-emitting elements in the second display area (b), and the distribution density of light-emitting elements in the second display area (b) may be smaller than or equal to the distribution density of light-emitting elements in the third display area (c). Based on the above structure, the distribution density of pixel circuits in the first display area (a) is the smallest, and it is ensured that sufficient light passes through the first display area and reaches the back surface of the display panel; at the same time, the first pixel circuit in the second display area (b) provides a driving voltage for the light-emitting elements in the first display area (a), so that the display resolution (PPI) of the first display area (a) is similar to or slightly smaller than that of other areas.

[0024] It needs to be explained that the pixel circuit drives a light-emitting element (OLED element) to emit light and includes a structure such as an active layer, a gate electrode, a source-drain electrode, a storage capacitor, a data line, and a scan line.

[0025] According to an embodiment of the present invention, with reference to FIG. 2, the display area overlaps with the first display area (a). It further includes an under-screen functional area (e) having a region. In some specific embodiments, as shown in (A) of FIG. 2, the first display area (a) and the under-screen functional area (e) overlap; in other embodiments, as shown in (B) of FIG. 2, the first display area (a) is covered by the under-screen functional area (e); and in yet another embodiment, as shown in (C) of FIG. 2, the under-screen functional area (e) is covered by the first display area (a). Here, the under-screen functional area refers to an area where the under-screen functional layer is installed in a corresponding manner, that is, the back surface of the display panel corresponding to the under-screen functional area is intended for installing the under-screen functional layer (under-screen camera), and since the first display area has a high light transmittance, the under-screen camera can satisfy the requirements for the amount of incoming light, and at the same time, the screen occupancy rate of the display panel can be greatly increased.

[0026] According to an embodiment of the present invention, with reference to FIGS. 3, 4 and 5, a display panel comprises: a base substrate (10); a plurality of first pixel circuits (21) provided on one side of the base substrate (10) and located within the second display area (b); and a line (30) provided on one side of the first pixel circuits (21) far from the base substrate (10). It includes a first light-emitting element (41) provided on one side of the line (30) far from the base substrate (10) and located within the first display area (a); wherein, in a direction far from the base substrate (10), the effective light-emitting anode area of ​​the first anode (411) among the first light-emitting elements (41) comprises at least two layers of conductive layers, and the at least two layers of conductive layers comprise a first transparent electrode (412) (in FIG. 4, the first transparent electrode (412), silver electrode (413), and second transparent electrode (414) are stacked in order), and a connecting line (50) located in the same layer as the first transparent electrode (412) and electrically connected thereto, wherein the line (30) is for electrically connecting the first pixel circuit (21) and the connecting line (50) so that the first pixel circuit (21) drives the first light-emitting element (41) to emit light. Accordingly, so that an electrical connection between the first pixel circuit (21) and the first light-emitting element (41) is made, the connecting line (50) is drawn out from the first transparent electrode (412) among the first anode (411) and is electrically connected to the line (30). In this way, the first anode (411) does not need to have a protrusion (4111) installed for electrically connecting to the line (as shown in FIG. 8, the protrusion (4111) has the same structure as the first anode, that is, a three-layer structure including the first transparent electrode, the silver electrode, and the second transparent electrode), and thus the light transmittance of the first display area can be further improved.Furthermore, when the display area has an under-screen function area, an under-screen camera is positioned on the back surface of the display panel corresponding to the under-screen function area, and the inventor discovered that when the first anode (411) is electrically connected to a line through a protrusion (4111), the under-screen camera experiences severe dazzle and diffraction during shooting due to the protrusion, resulting in reduced shooting performance. The present application can improve shooting performance by effectively mitigating dazzle and diffraction and significantly optimizing the shooting effect by installing a transparent connecting line that is electrically connected to the anode.

[0027] Here, the effective light-emitting anode region refers to the region of the first anode within the aperture defined by the pixel definition layer.

[0028] Here, the specific structure of the first pixel circuit (21) is not specifically required and can be flexibly selected by those skilled in the art according to actual circumstances, and in some embodiments, the first pixel circuit (21) is a 7T1C circuit (i.e., 7 transistors and 1 capacitor) structure and includes, for example, a driving transistor, a data writing transistor, a storage capacitor, a threshold value compensation transistor, a first reset transistor, a second reset transistor, a first light emission control transistor, and a second light emission control transistor. There are no special requirements for the longitudinal structure of the first pixel circuit (21), and in some embodiments, with reference to FIG. 4, the first pixel circuit (21) includes a structure such as an active layer (211), a gate electrode (212), and a source-drain electrode (213), wherein the active layer (211) is provided on one side of the base substrate (10), the gate insulating layer (61) covers the active layer (211), the gate electrode (212) is provided on the surface of the gate insulating layer (61) far from the base substrate, the interlayer dielectric layer (62) is provided on one side of the gate insulating layer (61) far from the base substrate and covers the gate electrode (212), and the source-drain electrode layer (213) is provided on one side of the interlayer dielectric layer (62) far from the base substrate, wherein the source-drain electrode (213) is electrically connected to the active layer through a via hole penetrating the gate insulating layer and the interlayer dielectric layer. Here, as shown in FIG. 4, the electrical connection between the line (30) and the first pixel circuit (21) is formed by electrically connecting the line (30) and the source drain electrode (213).

[0029] Additionally, referring to FIG. 4, the first light-emitting element (41) further includes a light-emitting layer (416) and a cathode (417) in addition to the first anode (411) described above. In some embodiments, the first light-emitting element (41) may further include at least one of a structure such as a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer, and a person skilled in the art may flexibly select according to actual design requirements.

[0030] According to an embodiment of the present invention, with reference to FIGS. 4 and 5, a line (30) and a connecting line (50) are electrically connected through a first via hole (641), and the first via hole (641) is located within the first display area. According to an embodiment of the present invention, with reference to FIGS. 4 and 6, a first anode (411) is installed by stacking a first transparent electrode (412), a silver electrode (413), and a second transparent electrode (414) in order in a direction away from the base substrate (10), and the connecting line (50) is formed integrally with the first transparent electrode (412), that is, the connecting line (50) and the first transparent electrode (412) are installed on the same layer and obtained through the same step. Accordingly, not only can the light transmittance of the first display area be increased, but defects such as dazzle and diffraction that occur when the under-screen camera takes a picture can also be effectively mitigated.

[0031] Additionally, referring to FIGS. 4 and FIGS. 11, the display panel further includes a pixel defining layer (65) that defines a plurality of openings and is provided on the surface of a second insulating layer (64) located far from the base substrate, wherein a first light-emitting element and a second light-emitting element are installed in the openings.

[0032] According to an embodiment of the present invention, with reference to FIG. 5, the first anode (411) includes an effective light-emitting anode region (4111) and a non-light-emitting anode region (4112) installed surrounding the effective light-emitting anode region (4111), and the orthographic projection of the effective light-emitting anode region (4111) on the base substrate is greater than or equal to the orthographic projection of the opening (651) on the base substrate defined by the pixel defining layer (65) of the first light-emitting element, and the non-light-emitting anode region (4112) is covered by the pixel defining layer. In some embodiments, the structure of the non-luminous anode region includes a first transparent electrode (412), a silver electrode (413), and a second transparent electrode (414) installed in sequence, that is, identical to the structure of the effective luminous anode region (4111); in other embodiments, the non-luminous anode region (4112) includes only the first transparent electrode (412), that is, when the silver electrode (413) and the second transparent electrode (414) on the upper layer of the connecting line are removed by etching during the manufacturing process, the silver electrode (413) and the second transparent electrode (414) corresponding to the non-luminous anode region (4112) are simultaneously removed, leaving only the first transparent electrode (412). A schematic diagram of the structure can be referenced in FIG. 7.

[0033] According to embodiments of the present invention, there are no specific requirements regarding the materials of the connecting line, the first transparent electrode, the second transparent electrode, and the line, and those skilled in the art may flexibly select them according to actual circumstances. In some embodiments, the materials of the connecting line, the first transparent electrode, the second transparent electrode, and the line are each independently transparent conductive materials such as ITO or IZO.

[0034] According to an embodiment of the present invention, with reference to FIG. 4, the display panel further comprises a first insulating layer (63) and a second insulating layer (64), wherein the first insulating layer (63) is provided on one side of the first pixel circuit located far from the base substrate (10) (in FIG. 4, the first insulating layer (63) is provided on one side of the source drain electrode (213) located far from the base substrate), and has a second via hole (631) penetrating the first insulating layer (63), wherein the line (30) is provided on one side of the first insulating layer (63) located far from the base substrate (10), and the line (30) is electrically connected to the first pixel circuit (21) (source drain electrode (213)) through the second via hole (631), and the second insulating layer (64) is provided on one side of the first insulating layer (63) located far from the base substrate (10), and It has a first via hole (641) that covers the line (30) and penetrates the second insulating layer (64), wherein the connecting line (50) is provided on one side of the second insulating layer (64) far from the base substrate (10) and is electrically connected to the line (30) through the first via hole (641).

[0035] According to an embodiment of the present invention, with reference to FIG. 9, a plurality of the first via holes (641) are provided in a multi-row arrangement, and the line (30) is located between two adjacent rows of the first via holes (641). Accordingly, it may be advantageous to arrange the layout of the line (30) rationally and to lay out more lines (30) within a limited space. Here, between the first anode (411) and the line (30) electrically connecting the first anode from FIG. 9, there may or may not be an overlapping area; specifically, a cross-sectional view cut along the line m-m' in FIG. 9 may be referenced to FIG. 10, where the orthographic projection of the first anode (411) on the base substrate and the orthographic projection of the line (30) electrically connected to the first anode on the base substrate have no overlapping area, that is, the line (30) is electrically connected to the connecting line (50) through the first via hole (641) and then extended in a direction far from the first anode (411); and a cross-sectional view cut along the line n-n' in FIG. 9 may be referenced to FIG. 11, where the orthographic projection of the first anode (411) on the base substrate and the orthographic projection of the line (30) electrically connected to the first anode on the base substrate have a partially overlapping area, that is, the line (30) is the first After being electrically connected to the connecting line (50) through the via hole (641), it is extended and arranged in a direction approaching the corresponding first positive electrode (411).

[0036] According to an embodiment of the present invention, with reference to FIGS. 3, 12 and 13, a display panel comprises a plurality of second pixel circuits (22) and a plurality of second light-emitting elements (42), and the second pixel circuits (22) and the second light-emitting elements (42) are all located within the second display area (b). In some embodiments, as shown in FIG. 12, the second pixel circuit (22) is electrically connected directly to the second anode (421) of the second light-emitting element (42) through a third via hole (643) penetrating the first insulating layer (63) and the second insulating layer (64) to drive the second light-emitting element to emit light; in other embodiments, as shown in FIG. 13, the display panel includes a conductive layer (70) provided in the same layer as the line (30) (i.e., the conductive layer (70) is made of the same material as the line (30) and is formed by simultaneous engineering), and the second anode (421) is electrically connected to the second pixel circuit (22) through the conductive layer (70), that is, the second anode (421) is electrically connected to the conductive layer through a fourth via hole (644) penetrating the second insulating layer (64), and the conductive layer (70) is the first It is electrically connected to the second pixel circuit through the fifth via hole (635) penetrating the insulating layer (63), thereby establishing an electrical connection between the second pixel circuit and the second positive electrode, and the second pixel circuit drives the second light-emitting element to emit light.

[0037] Additionally, referring to FIGS. 12 and 13, the second light-emitting element (42) further includes a light-emitting layer (422) and a cathode (423) in addition to the aforementioned second anode (421). In some embodiments, the second light-emitting element (42) may further include at least one of a structure such as a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer, and a person skilled in the art may flexibly select according to actual design requirements.

[0038] Herein, referring to FIGS. 12 and 13, the second pixel circuit (22) includes a structure such as an active layer (221), a gate electrode (222), and a source-drain electrode (223), the active layer (221) is provided on one side of the base substrate (10), the gate insulating layer (61) covers the active layer (221), the gate electrode (222) is provided on the surface of the gate insulating layer (61) far from the base substrate, the interlayer dielectric layer (62) is provided on one side of the gate insulating layer (61) far from the base substrate to cover the gate electrode (222), and the source-drain electrode layer (223) is provided on one side of the interlayer dielectric layer (62) far from the base substrate, and herein, the source-drain electrode (223) is electrically connected to the active layer through a via hole penetrating the gate insulating layer and the interlayer dielectric layer, and as shown in FIGS. 12 and 13, the source-drain electrode (223) of the second pixel circuit It is electrically connected to the second positive electrode (421).

[0039] In some embodiments, with reference to FIG. 3, the first pixel circuit (21) and the second pixel circuit (22) are array-distributed in the first direction (X) and the second direction (Y). Here, in order to ensure uniform brightness within the second display area, a plurality of first pixel circuits (21) and second pixel circuits (22) may be uniformly distributed and provided. The specific installation method can be flexibly selected by a person skilled in the art according to specific circumstances such as the distribution of pixel units, and is not limited thereto.

[0040] According to an embodiment of the present invention, the shapes of the first anode and the second anode match. Therefore, the first anode does not require the installation of a protrusion, and by maintaining the matching shapes of the first anode and the second anode, the luminous efficiency of the first light-emitting element can be effectively secured, while the high light transmittance of the first display area can be effectively secured. A person skilled in the art can understand that the shapes of the anodes of light-emitting elements of different colors may differ from one another, that is, the shapes of the anodes of the blue light-emitting element, the red light-emitting element, and the green light-emitting element are different from one another. Therefore, the phrase “the shapes of the first anode and the second anode match” means that the shapes of the anodes of the light-emitting elements of the same color in the first display area and the second display area are identical. That is, the shapes of the first anode of the red light-emitting element in the first display area and the second anode of the red light-emitting element in the second display area are identical, the shapes of the first anode of the blue light-emitting element in the first display area and the second anode of the blue light-emitting element in the second display area are identical, and the shapes of the first anode of the green light-emitting element in the first display area and the second anode of the green light-emitting element in the second display area are identical.

[0041] It needs to be explained that, because it is difficult for the shapes of the first anode and the second anode to match completely due to factors such as the process, if the shapes of the first anode and the second anode generally match, it can be considered that “the shapes of the first anode and the second anode match.”

[0042] According to another aspect of the present invention, the present invention provides a method for manufacturing the aforementioned display panel. According to an embodiment of the present invention, the display area of ​​the display panel includes a first display area and a second display area, and the pixel density in the first display area is smaller than the pixel density in the second display area. Referring to FIG. 14, the method for manufacturing the aforementioned display panel includes the following steps.

[0043] Step S100: A plurality of first pixel circuits (21) are formed on one side of the base substrate (10) such that the first pixel circuit (21) is located within the second display area (b).

[0044] Here, there are no specific requirements regarding the structure of the first pixel circuit (21), and those skilled in the art may flexibly select it according to actual circumstances, and in some embodiments, the first pixel circuit (21) has a 7T1C circuit structure (i.e., 7 transistors and 1 capacitor) and includes, for example, a driving transistor, a data writing transistor, a storage capacitor, a threshold value compensation transistor, a first reset transistor, a second reset transistor, a first light emission control transistor, and a second light emission control transistor. There are no special requirements for the longitudinal structure of the first pixel circuit (21), and in some embodiments, with reference to FIG. 4, the first pixel circuit (21) includes a structure such as an active layer (211), a gate electrode (212), and a source-drain electrode (213), wherein the active layer (211) is provided on one side of the base substrate (10), the gate insulating layer (61) covers the active layer (211), the gate electrode (212) is provided on the surface of the gate insulating layer (61) far from the base substrate, the interlayer dielectric layer (62) is provided on one side of the gate insulating layer (61) far from the base substrate to cover the gate electrode (212), and the source-drain electrode layer (213) is provided on one side of the interlayer dielectric layer (62) far from the base substrate, wherein the source-drain electrode (213) is electrically connected to the active layer through a via hole penetrating the gate insulating layer and the interlayer dielectric layer.

[0045] According to an embodiment of the present invention, a method for manufacturing a display panel further comprises the step of forming a second pixel circuit (22) (as shown in FIG. 3 and FIG. 12) within a second display area, and those skilled in the art can understand that the second pixel circuit and the first pixel circuit are manufactured simultaneously. Referring to FIG. 8, the second pixel circuit (22) includes a structure such as an active layer (221), a gate electrode (222), and a source-drain electrode (223). Here, the active layer (221) is provided on one side of the base substrate (10), the gate insulating layer (61) covers the active layer (221), the gate electrode (222) is provided on the surface of the gate insulating layer (61) far from the base substrate, the interlayer dielectric layer (62) is provided on one side of the gate insulating layer (61) far from the base substrate to cover the gate electrode (222), and the source-drain electrode layer (223) is provided on one side of the interlayer dielectric layer (62) far from the base substrate. Here, the source-drain electrode (223) is electrically connected to the active layer through a via hole penetrating the gate insulating layer and the interlayer dielectric layer.

[0046] Additionally, referring to FIG. 3, the first pixel circuit (21) and the second pixel circuit (22) are array-distributed in the first direction (X) and the second direction (Y). Here, in order to ensure uniform brightness within the second display area, a plurality of first pixel circuits (21) and second pixel circuits (22) may be uniformly distributed and provided. The specific installation method can be flexibly selected by a person skilled in the art according to specific circumstances such as the distribution of pixel units, and is not restricted therefrom.

[0047] Step S200: A line (30) is formed on one side of a first pixel circuit (21) located far from the base substrate (10), and the line (30) and the first pixel circuit (21) are electrically connected. As shown in FIG. 13, the fact that the line (30) and the first pixel circuit (21) are electrically connected means that the line (30) and the source drain electrode layer (213) are electrically connected.

[0048] Here, as illustrated in FIG. 13, a first insulating layer material is deposited and formed on one side of a first pixel circuit (21) located away from the base substrate (10) in advance so that a first insulating layer (63) having a second via hole (631) is formed before the line (30) is formed, and a second via hole (631) penetrating the first insulating layer is manufactured in the first insulating layer; here, the line (30) is located on one side of the first insulating layer (63) located away from the base substrate (10), and the line (30) is electrically connected to the first pixel circuit (21) through the second via hole (631) (electrically connected to the source drain electrode layer (213)).

[0049] Furthermore, after forming the line (30), a second insulating material layer is deposited and formed on one side of the first insulating layer (63) far from the base substrate (10) so that a second insulating layer (64) having a first via hole (641) is formed, and a first via hole (641) penetrating the second insulating material layer is manufactured in the second insulating material layer, that is, the line (30) is located between the first insulating layer (63) and the second insulating layer (64), and therein, a subsequently formed connecting line (50) is provided on one side of the second insulating layer (64) far from the base substrate (10) and is electrically connected to the line (30) through the first via hole (641).

[0050] Step S300: A first light-emitting element (41) and a connecting line (50) are formed on one side of a line (30) far from the base substrate, wherein the first light-emitting element (41) is located within a first display area (a), and in a direction far from the base substrate (10), the effective light-emitting anode area of ​​the first anode (411) among the first light-emitting elements (41) comprises at least two conductive layers, and at least one of the at least two conductive layers comprises a first transparent electrode (412) (in FIG. 13, an example is provided that the first transparent electrode (412), silver electrode (413), and second transparent electrode (414) are installed by stacking the first anode (411) in order); and the connecting line (50) is provided to be electrically connected to the first transparent electrode (412) and is formed through the same step, and the line (30) and the connecting line (50) are electrically connected so that the first pixel circuit (21) drives the first light-emitting element (41) to emit light. It connects.

[0051] Here, in some embodiments, as shown in FIG. 13, the first light-emitting element (41) and the connecting line (50) are formed on the surface of a second insulating layer (64) away from the base substrate (10), and the connecting line (50) is electrically connected to the line (30) through a second via hole (641).

[0052] According to an embodiment of the present invention, a connecting line is drawn from a first transparent electrode among the first anodes to implement an electrical connection between the first pixel circuit and the first light-emitting element, and is electrically connected to a line. In this way, the first anode does not need to have a protrusion for electrically connecting to a line, and the light transmittance of the first display area can be further improved.

[0053] According to an embodiment of the present invention, with reference to FIG. 15, the step of forming the first anode (411) and the connecting line (50) includes the following steps.

[0054] Step S310: A first transparent conductive layer (4120), a silver layer (4130), and a second transparent conductive layer (4140) are deposited in sequence on the surface of a second insulating layer (64) located away from the base substrate (10).

[0055] Step S320: A first photoresist (71) and a second photoresist (72) are formed respectively in a first region and a second region on the surface of the second transparent conductive layer (4140), wherein the thickness of the first photoresist (71) is thicker than the thickness of the second photoresist (72). A person skilled in the art can understand that the first region and the orthographic projection on the surface of the second insulating layer (64) of the first anode formed as needed are superimposed, and the second region and the orthographic projection on the surface of the second insulating layer (64) of the connecting line (50) formed as needed are superimposed.

[0056] Here, in some specific embodiments, the step of forming the first photoresist (71) and the second photoresist (72) includes: forming a full photoresist of equal thickness on the surface of the second insulating layer (64), then removing the photoresist excluding the first and second regions using a halftone mask board and an ash process, and thinning the photoresist installed in the second region to obtain the first photoresist (71) and the second photoresist (72).

[0057] Step S330: The first transparent conductive layer (4120), silver layer (4130), and second transparent conductive layer (4140) that are not covered by the first photoresist (71) and the second photoresist (72) are removed. Through the above step, the initial shape of the first anode and the connecting line is obtained.

[0058] Step S340: Ash processing is performed on the first photoresist (71) and the second photoresist (72) so that the second photoresist (72) is removed and the first photoresist (71) is thinned. In some embodiments, the second photoresist (72) can be removed and the first photoresist (71) can be thinned through an ash process.

[0059] Step S350: The second transparent conductive layer (4140) and the silver layer (4130) at the second region point are removed through an etching process, leaving the first transparent conductive layer (4120) and obtaining the connecting line (50).

[0060] In the above step, the second transparent conductive layer (4140) and the silver layer (4130) at the second region point can be removed by controlling the etching speed and etching time, and the first transparent conductive layer (4120) can be left. Here, the specific etching speed and etching time can be flexibly selected by a person skilled in the art according to actual conditions such as the thickness and material of each layer structure, and there are no requirements for limitations here.

[0061] Step S360: The first photoresist (71) is removed after thinning to obtain the first anode (411).

[0062] According to an embodiment of the present invention, a method for manufacturing a display panel comprises the following steps. Referring to FIG. 13, a pixel defining layer (65) is formed on the surface of a second insulating layer (64) located far from a base substrate, and a first anode and a connecting line are formed, and then the pixel defining layer (65) is formed, wherein the pixel defining layer (65) covers a portion of the connecting line (50) and the first anode (411), and the pixel defining layer (65) defines a plurality of openings, and a light-emitting element is provided within the openings.

[0063] According to an embodiment of the present invention, with reference to FIGS. 3, 12 and 13, a method for manufacturing a display panel further comprises the step of manufacturing a plurality of second light-emitting elements (42), wherein the second light-emitting elements (42) are located within the second display area (b). In some embodiments, as illustrated in FIG. 12, in order to drive the second light-emitting element to emit light, the second pixel circuit (22) is electrically connected directly to the second anode (421) of the second light-emitting element (42) through a third via hole (643) penetrating the first insulating layer (63) and the second insulating layer (64); in other embodiments, as illustrated in FIG. 13, the display panel further comprises a conductive layer (70), the conductive layer (70) is provided in the same layer as the line (30) (i.e., the conductive layer (70) is made of the same material as the line (30) and is formed by simultaneous engineering), and the second anode (421) is electrically connected to the second pixel circuit (22) through the conductive layer (70), that is, the second anode (421) is electrically connected to the conductive layer through a first via hole (641) penetrating the second insulating layer (64). The conductive layer (70) is also electrically connected to the second pixel circuit through a second via hole (631) penetrating the first insulating layer (63), thereby enabling an electrical connection between the second pixel circuit and the second positive electrode, and the second pixel circuit drives the second light-emitting element to emit light.

[0064] Additionally, referring to FIGS. 12 and 13, the second light-emitting element (42) further includes a light-emitting layer (422) and a cathode (423) in addition to the aforementioned second anode (421). In some embodiments, the second light-emitting element (42) may further include at least one of a structure such as a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer, and a person skilled in the art may flexibly select according to actual design requirements.

[0065] According to an embodiment of the present invention, with reference to FIGS. 4 and 5, a line (30) and a connecting line (50) are electrically connected through a first via hole (641), and the first via hole (641) is located within the first display area. According to an embodiment of the present invention, with reference to FIGS. 4 and 6, a first anode (411) is provided by stacking a first transparent electrode (412), a silver electrode (413), and a second transparent electrode (414) in order in a direction far from the base substrate (10), and the connecting line (50) and the first transparent electrode (412) are integrally formed, that is, the connecting line (50) is provided on the same layer as the first transparent electrode (412) and is manufactured and obtained in the same step. By doing so, the light transmittance of the first display area can be improved, and defects such as dazzle and diffraction occurring when the under-screen camera takes a picture can be effectively mitigated.

[0066] Additionally, referring to FIGS. 4 and FIGS. 12, the display panel further includes a pixel defining layer (65), the pixel defining layer (65) is provided on the surface of a second insulating layer (64) located far from the base substrate and defines a plurality of openings, wherein a first light-emitting element and a second light-emitting element are installed within the openings.

[0067] According to an embodiment of the present invention, with reference to FIG. 5, the first anode (411) includes an effective light-emitting anode region (4111) and a non-light-emitting anode region (4112) installed surrounding the effective light-emitting anode region (4111), and the orthographic projection of the effective light-emitting anode region (4111) on the base substrate is greater than or equal to the orthographic projection of the opening (651) on the base substrate defined by the pixel defining layer (65) of the first light-emitting element, and the non-light-emitting anode region (4112) is covered by the pixel defining layer. In some embodiments, the structure of the non-luminous anode region includes a first transparent electrode (412), a silver electrode (413), and a second transparent electrode (414) installed in sequence, that is, identical to the structure of the effective luminous anode region (4111); in other embodiments, the non-luminous anode region (4112) includes only the first transparent electrode (412), that is, when the silver electrode (413) and the second transparent electrode (414) on the upper layer of the connecting line are removed by etching during the manufacturing process, the silver electrode (413) and the second transparent electrode (414) corresponding to the non-luminous anode region (4112) are also removed simultaneously, leaving only the first transparent electrode (412). Refer to FIG. 7 for a schematic diagram of the structure.

[0068] A person skilled in the art can understand that the second light-emitting element and the first light-emitting element are manufactured synchronously, that is, the first anode and the second anode among the second light-emitting elements are also manufactured synchronously.

[0069] In another aspect of the present invention, the present invention provides a display device. According to an embodiment of the present invention, the display device comprises: the aforementioned display panel, wherein the display area comprises a first display area and a second display area; and an under-screen functional layer having an area where an orthographic projection on the display panel overlaps with the first display area, that is, the orthographic projection on the display panel overlaps with an under-screen functional area. Accordingly, the display device can satisfy the requirement for a high amount of light input of the under-screen functional layer. When the under-screen functional layer is an under-screen camera, the under-screen camera has a good amount of light input, thereby ensuring high image quality. Those skilled in the art will understand that the display device possesses all the features and advantages of the aforementioned display panel, which are not mentioned further herein.

[0070] According to embodiments of the present invention, the specific type of the display device is not specifically required and can be flexibly selected by those skilled in the art according to actual circumstances. In some embodiments, the specific type of the display device includes, but is not limited to, any display device having a display function, such as a mobile phone, notebook, Kindle, iPad, TV, or game console.

[0071] A person skilled in the art can understand that the display device described above includes, in addition to the display panel described above, an essential structure or component of the display device. Taking a mobile phone as an example, in addition to the display panel described above, it further includes an essential structure or component such as a glass cover plate, a battery rear cover, a middle frame, a main board, a touch module, an audio module, and a camera module.

[0072] In the description of this specification, the description of reference terms such as “one embodiment,” “some embodiment,” “example,” “specific example,” or “some example” means that at least one embodiment or example of the present invention includes specific features, structures, materials, or properties described in that embodiment or example. In this specification, exemplary expressions of such terms are not necessarily intended to refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be combined in an appropriate manner in any one or more embodiments or examples. Additionally, unless contradictory, a person skilled in the art may combine and combine various embodiments or examples and features of various embodiments or examples described in this specification.

[0073] Although embodiments of the present disclosure have been illustrated and described above, it should be understood that such embodiments are illustrative and should not be understood as a limitation of the present disclosure, and that a person skilled in the art may change, modify, replace, and alter the embodiments within the scope of the present disclosure.

Claims

Claim 1 A display panel comprising a display area including a first display area and a second display area, wherein the pixel circuit density in the first display area is smaller than the pixel circuit density in the second display area, the display panel comprising: a base substrate; a plurality of first pixel circuits provided on one side of the base substrate and located within the second display area; a line provided on one side of the first pixel circuit located far from the base substrate; a first light-emitting element provided on one side of the line located far from the base substrate and located within the first display area, wherein the effective light-emitting anode area of ​​the first anode, in a direction far from the base substrate, comprises at least two layers of conductive layers, and the at least two layers of conductive layers comprise a first transparent electrode; and a connecting line located on the same layer as the first transparent electrode and electrically connected thereto; wherein the line electrically connects the first pixel circuit and the connecting line so that the first pixel circuit drives the first light-emitting element to emit light, the display area further comprises an under-screen function area, the under-screen function area and the first display area have an overlapping area, and the under-screen function area is an under-screen A display panel characterized in that it is an area for installing a camera in a corresponding manner, and the back surface of the display panel corresponding to the under-screen function area is for installing the under-screen camera, the line is electrically connected to the connecting line through a first via hole, the first via hole is located within the first display area, a plurality of the first via holes are arranged in multiple rows, and the line is located between two adjacent rows of the first via holes. Claim 2 A display panel according to claim 1, wherein, in a direction far from the base substrate, the first anode comprises the first transparent electrode, the silver electrode, and the second transparent electrode which are stacked and installed in sequence, and the connecting line and the first transparent electrode are an integral structure. Claim 3 A display panel according to claim 1, further comprising: a first insulating layer provided on one side of the first pixel circuit far from the base substrate and having a penetrating second via hole, wherein the line is located on one side far from the base substrate and the line is electrically connected to the first pixel circuit through the second via hole; and a second insulating layer provided on one side of the first insulating layer far from the base substrate, covering the line and having the penetrating first via hole, wherein the connecting line is provided on one side far from the base substrate. Claim 4 A display panel according to claim 1, wherein the first anode comprises an effective light-emitting anode region and a non-light-emitting anode region provided surrounding the effective light-emitting anode region, the orthographic projection of the effective light-emitting anode region on the base substrate is greater than or equal to the orthographic projection of an aperture defined by a pixel defining layer among the first light-emitting elements on the base substrate, the non-light-emitting anode region is covered by the pixel defining layer, and the non-light-emitting anode region comprises only the first transparent electrode. Claim 5 In claim 3, the display panel further comprises a plurality of second pixel circuits and a plurality of second light-emitting elements, wherein the second pixel circuits and the second light-emitting elements are all located within the second display area, and the method of connecting the second pixel circuit and the second anode among the second light-emitting elements is at least one of the following: a method in which the second pixel circuit is electrically connected directly to the second anode among the second light-emitting elements through a third via hole to drive the second light-emitting element to emit light; and a method in which the display panel further comprises a conductive layer to drive the second light-emitting element to emit light, wherein the conductive layer is provided on the same layer as the line, the second anode is electrically connected to the conductive layer through a fourth via hole penetrating the second insulating layer, and the conductive layer is electrically connected to the second pixel circuit through a fifth via hole penetrating the first insulating layer. Claim 6 A method for manufacturing a display panel according to any one of claims 1 to 5, wherein the display area includes a first display area and a second display area, and the pixel circuit density in the first display area is smaller than the pixel circuit density in the second display area, comprising: a step of forming a plurality of first pixel circuits on one side of a base substrate so as to be located within the second display area; a step of forming a line electrically connected to the first pixel circuit on one side of the first pixel circuit located far from the base substrate; and a step of forming a first light-emitting element and a connecting line on one side of the line located far from the base substrate, wherein the first light-emitting element is located within the first display area, and in a direction far from the base substrate, the effective light-emitting anode area of ​​the first anode of the first light-emitting element comprises at least two layers of conductive layers, at least one of the at least two layers of conductive layers comprises a first transparent electrode, and the connecting line is electrically connected to the first transparent electrode and formed through the same step. A method for manufacturing a display panel characterized by including a first pixel circuit and electrically connecting the line and the connecting line so that the first pixel circuit drives the first light-emitting element to emit light. Claim 7 In claim 6, the method for manufacturing the display panel further comprises: a step of depositing a first insulating material layer on one side of the first pixel circuit located far from the base substrate to form a first insulating layer having a second via hole, and manufacturing the second via hole penetrating the first insulating material layer in the first insulating material layer; and a step of depositing a second insulating material layer on one side of the first insulating layer located far from the base substrate to form a second insulating layer having a first via hole, and manufacturing the first via hole penetrating the second insulating material layer in the second insulating material layer; wherein the line is located between the first insulating layer and the second insulating layer and is electrically connected to the first pixel circuit through the second via hole; and the connecting line is provided on one side of the second insulating layer located far from the base substrate and is electrically connected to the line through the first via hole. Claim 8 In claim 7, the step of forming the first anode and the connecting line comprises: a step of sequentially depositing and forming a first transparent conductive layer, a silver layer, and a second transparent conductive layer on the surface of the second insulating layer located far from the base substrate; a step of forming a first photoresist and a second photoresist, respectively, in a first region and a second region on the surface of the second transparent conductive layer, wherein the thickness of the first photoresist is thicker than the thickness of the second photoresist; a step of removing the first transparent conductive layer, the silver layer, and the second transparent conductive layer that are not covered by the first photoresist and the second photoresist; a step of performing ash processing on the first photoresist and the second photoresist to remove the second photoresist and thin the first photoresist; a step of removing the second transparent conductive layer and the silver layer at the second region point through an etching process, leaving the first transparent conductive layer, to obtain the connecting line; and the first photoresist after thinning A method for manufacturing a display panel characterized by including the step of removing to obtain the first anode. Claim 9 A display device characterized by comprising: a display panel according to any one of claims 1 to 5, wherein the display area includes a first display area and a second display area; and an under-screen functional layer having an overlapping area of ​​an orthographic projection on the display panel and the first display area. Claim 10 delete Claim 11 delete Claim 12 delete

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