Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and is used for improving the performance of the display panel. The display panel includes a substrate; the sub-pixels are located on one side of the substrate, each sub-pixel comprises a pixel driving circuit and a pixel definition layer located on the side, away from the substrate, of the pixel driving circuit, the pixel definition layer comprises a pixel opening, the light-emitting element comprises a first electrode and a second electrode, and at least part of the first electrode is exposed by the pixel opening; the second electrodes of different light-emitting elements are arranged at intervals; the connecting line is electrically connected with the second electrode and the pixel driving circuit; the connecting line and the pixel opening are at least partially not overlapped in the direction perpendicular to the plane where the substrate is located, or the connecting line comprises a first part, the first part and the pixel opening are at least partially overlapped in the direction perpendicular to the plane where the substrate is located, the first part comprises an axisymmetric graph, and the symmetry axis of the first part passes through the geometric center of the pixel opening.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] Organic light-emitting diode (OLED) display panels have the characteristic of self-illumination, eliminating the need for an additional light source. This facilitates the overall thinning and lightening of display devices and enables the fabrication of flexible displays, making them a key focus of current research in the display field.

[0003] Currently, the performance of OLED display panels still needs improvement. Summary of the Invention

[0004] This invention provides a display panel and a display device for improving the performance of the display panel.

[0005] In a first aspect, embodiments of the present invention provide a display panel, comprising: Substrate; Multiple sub-pixels located on one side of the substrate, each sub-pixel including a pixel driving circuit. A pixel definition layer is located on the side of the pixel driving circuit away from the substrate. The pixel definition layer includes pixel openings. The light-emitting element includes a first electrode and a second electrode, at least a portion of the first electrode being exposed by a pixel opening; the second electrodes of different light-emitting elements are spaced apart. The connecting wire electrically connects the second electrode to the pixel driving circuit. Along a direction perpendicular to the plane of the substrate, the connecting line and the pixel opening do not overlap at least partially, or the connecting line includes a first portion, along a direction perpendicular to the plane of the substrate, the first portion and the pixel opening overlap at least partially, the first portion includes an axisymmetric pattern, and the axis of symmetry of the first portion passes through the geometric center of the pixel opening.

[0006] Secondly, embodiments of the present invention provide a display device, including the display panel described above.

[0007] The display panel and display device provided in this embodiment of the invention, by electrically connecting the pixel driving circuit to the second electrode of the light-emitting element and electrically connecting the first electrode to the first power supply voltage terminal, can improve the current driving capability of the pixel driving circuit, enabling the pixel driving circuit to achieve a faster response speed, which is beneficial for supporting higher refresh rate displays and achieving a smaller device size.

[0008] Furthermore, by providing a connecting line between the pixel driving circuit and the second electrode, the embodiments of the present invention can achieve an electrical connection between the pixel driving circuit and the second electrode. Moreover, by designing the position of the connecting line's orthographic projection onto the plane of the substrate, and ensuring that the connecting line and the pixel opening do not overlap at least partially in the direction perpendicular to the plane of the substrate, the embodiments of the present invention can avoid the connecting line affecting the flatness of the first electrode of the light-emitting element. This improves the intensity consistency of the light emitted by the light-emitting element at wide viewing angles in different directions, which is beneficial for improving the consistency of the emitted color of the display panel at wide viewing angles in different directions.

[0009] Alternatively, when the connecting line and the pixel opening at least partially overlap in a direction perpendicular to the plane of the substrate, embodiments of the present invention can improve the flatness of the portion of the first electrode of the light-emitting element located on both sides of the first part's axis of symmetry by making the shape of the orthographic projection of the first part of the connecting line on the plane of the substrate include an axisymmetric pattern and making the axis of symmetry of the first part pass through the geometric center of the pixel opening. Furthermore, these two parts can be symmetrically arranged about the axis of symmetry of the first part, thereby making the intensity of the wide-viewing-angle light emitted by the light-emitting element propagating towards both sides of the axis of symmetry of the first part more consistent. This can at least improve the color consistency of the wide-viewing-angle light emitted by the display panel propagating towards both sides of the axis of symmetry of the first part, and at least avoid the dispersion problem caused by the inconsistent light emitted by the display panel observed by the user in these two directions. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A top view schematic diagram of a display panel provided in an embodiment of the present invention; Figure 2 A schematic diagram of the equivalent circuit of a sub-pixel provided in an embodiment of the present invention; Figure 3 A cross-sectional schematic diagram of a display panel provided in an embodiment of the present invention; Figure 4 A top view schematic diagram of a second electrode, pixel opening, and separator provided in an embodiment of the present invention; Figure 5 A top view of a pixel opening and connecting line provided in an embodiment of the present invention; Figure 6A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 7 A top view schematic diagram of a light-shielding layer and a pixel opening provided in an embodiment of the present invention; Figure 8 A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 9 A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 10 A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 11 A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 12 A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 13 A top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention; Figure 14 A schematic diagram of yet another display panel provided in an embodiment of the present invention; Figure 15 This is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0012] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0013] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0015] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0016] This invention provides a display panel, such as... Figure 1 As shown, Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of the present invention. The display panel includes a plurality of pixel units 1, which are arranged in an array along a first direction h11 and a second direction h12. The first direction h11 intersects the second direction h12. Figure 1 The first direction h11 and the second direction h12 are perpendicular as an illustration.

[0017] For example, such as Figure 1 As shown, pixel unit 1 includes multiple sub-pixels 10. Optionally, the multiple sub-pixels 10 include a first sub-pixel 101, a second sub-pixel 102, and a third sub-pixel 103, each with a different emitted light color. Optionally, the emitted light color of the first sub-pixel 101 may include red, the emitted light color of the second sub-pixel 102 may include blue, and the emitted light color of the third sub-pixel 103 may include green.

[0018] Optional, such as Figure 2 As shown, Figure 2 An equivalent circuit diagram of a sub-pixel is provided in an embodiment of the present invention. The sub-pixel 10 includes a pixel driving circuit 11 and a light-emitting element 12 that are electrically connected.

[0019] For example, such as Figure 2 As shown, the pixel driving circuit 11 includes a driving transistor T1, a data writing transistor T2, and a storage capacitor Cst. The gate of the driving transistor T1 is electrically connected to a first node N1, its first electrode is electrically connected to a second node N2, and its second electrode is electrically connected to a third node N3. The gate of the data writing transistor T2 is electrically connected to the scan line S, its first electrode is electrically connected to the data line Data, and its second electrode is electrically connected to the first node N1. The first electrode of the storage capacitor Cst is electrically connected to the first node N1, and its second electrode is electrically connected to the second node N2. For example, the first electrode of the light-emitting element 12 is electrically connected to a first power supply voltage terminal PVDD, and the second electrode is electrically connected to the aforementioned third node N3. The second node N2 is electrically connected to a second power supply voltage terminal PVEE. For example, the voltage of the first power supply voltage terminal PVDD is greater than the voltage of the second power supply voltage terminal PVEE. The first electrode includes an anode, and the second electrode includes a cathode.

[0020] When the display panel is operating, the data writing transistor T2 is turned on under the control of the scan line S, and the data voltage provided by the data signal line Data is written to the first node N1 through the turned-on data writing transistor T2. Under the control of the first node N1, the driving transistor T1 is turned on, and current flows through the light-emitting element 12. The driving transistor T1 can control the driving current flowing through the light-emitting element 12 according to the magnitude of its gate voltage, and the light-emitting element 12 can change its brightness according to the magnitude of the driving current.

[0021] Optionally, the light-emitting element 12 includes any one of an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), or a micro light-emitting diode (Micro LED).

[0022] The display panel provided in this embodiment of the invention uses a cathode driving method. By electrically connecting the pixel driving circuit 11 to the second electrode of the light-emitting element 12 and electrically connecting the first electrode to the first power supply voltage terminal PVDD, the current driving capability of the pixel driving circuit 11 can be improved compared with the anode driving method in related technologies, where the pixel driving circuit 11 is electrically connected to the first electrode of the light-emitting element 12 and the second electrode is electrically connected to the second power supply voltage terminal PVEE. This allows the pixel driving circuit 11 to achieve a faster response speed, which is beneficial for supporting higher refresh rate displays and achieving smaller device size. It is more suitable for manufacturing microdisplays with ultra-high resolution, ultra-high refresh rate, high brightness, small size, and low power consumption, such as virtual reality (VR) display devices and augmented reality (AR) display devices.

[0023] For example, such as Figure 3 As shown, Figure 3 This is a cross-sectional schematic diagram of a display panel provided in an embodiment of the present invention. The display panel also includes a substrate 21, and the sub-pixels 10 are located on one side of the substrate 21.

[0024] like Figure 3 As shown, the display panel includes an array film layer 22 located on one side of the substrate 21 and a display film layer 23 located on the side of the array film layer 22 away from the substrate 21. The array film layer 22 includes the aforementioned pixel driving circuit 11. Figure 3 Only the driving transistor T1, which is electrically connected to the light-emitting element 12 in the pixel driving circuit 11, is shown as an illustration. The display film layer 23 includes the aforementioned light-emitting element 12.

[0025] For example, such as Figure 3 As shown, the light-emitting element 12 includes a first electrode 121, a light-emitting layer 123, and a second electrode 122 sequentially stacked along a direction away from the substrate 21. The display film layer 23 includes a pixel definition layer 231, which includes a pixel opening 2311. The first electrode 121 is located on the side of the pixel definition layer 231 closer to the substrate 21, and at least a portion of the first electrode 121 is exposed by the pixel opening 2311. At least a portion of the light-emitting layer 123 is located within the pixel opening 2311.

[0026] For example, in combination Figure 3 and Figure 4 As shown, Figure 4 This is a top view schematic diagram of a second electrode, pixel opening, and separator provided in an embodiment of the present invention. The display panel further includes a separator 3, the orthographic projection of which onto the plane of substrate 21 is located between two adjacent pixel openings 2311. Along a direction h2 perpendicular to the plane of substrate 21, the separator 3 is located between the second electrode 122 and the pixel definition layer 231.

[0027] For example, such as Figure 3 As shown, the angle α between the side surface S11 and the bottom surface S12 of the partition 3 is an obtuse angle. For example, the cross-sectional shape of the partition 3 in the direction perpendicular to the plane of the substrate 21 includes an inverted trapezoid. Based on this arrangement, the second electrode 122 can be broken at the edge of the partition 3, enabling the second electrodes 122 of two adjacent light-emitting elements 12 to be spaced apart. Moreover, a common mask can be used to fabricate the second electrodes 122 of multiple light-emitting elements 12 in the same process, which helps to simplify the manufacturing process of the display panel.

[0028] For example, such as Figure 3 and Figure 4 As shown, the display panel also includes an electrode spacing portion 120 located on the side of the separation portion 3 away from the substrate 21.

[0029] like Figure 4 As shown, the aforementioned dividing portion 3 includes a first sub-dividing portion 31 and a second sub-dividing portion 32. The first sub-dividing portion 31 is located between two adjacent pixel openings 2311 on the second direction h12, and the second sub-dividing portion 32 is located between two adjacent pixel openings 2311 on the first direction h11.

[0030] It should be noted that, in order to better distinguish between the separator 3 and the electrode spacer 120, Figure 4 The widths of the two are illustrated differently. In this embodiment of the invention, the widths of the partition 3 and the electrode spacing 120 are not limited. For example, the width of the partition 3 can be equal to the width of the electrode spacing 120, or the width of the partition 3 can be greater than the width of the electrode spacing 120.

[0031] For example, in combination Figure 3 and Figure 5 As shown, Figure 5 This is a top view schematic diagram of pixel openings and connecting lines provided in an embodiment of the present invention, wherein four pixel openings corresponding to one pixel unit are used as an illustration. The display panel also includes multiple connecting lines 4, which are electrically connected to the second electrode 122. Figure 5 (not shown) and the corresponding pixel driving circuit 11 ( Figure 5 (Not shown).

[0032] For example, such as Figure 3 As shown, one end of the connecting line 4 is electrically connected to the transistor in the pixel driving circuit 11, and the other end is electrically connected to the second electrode 122. When the display panel is working, the driving current provided by the pixel driving circuit 11 is transmitted to the second electrode 122 of the light-emitting element 12 through the connecting line 4 to light up the light-emitting element 12.

[0033] When setting up connection line 4, for example, as follows: Figure 5 As shown, along the direction h2 perpendicular to the plane of the substrate, the connecting line 4 and the pixel opening 2311 do not overlap at least partially. Figure 5 The diagram illustrates how the connecting line 4 and the pixel opening 2311 are completely offset along the direction h2, which is perpendicular to the plane of the substrate.

[0034] In this embodiment of the invention, the connecting line 4 is located on the side of the first electrode 121 close to the substrate 21. Since the connecting line 4 has a certain thickness, the flatness of the film layer above the connecting line 4 will be affected by the connecting line 4. For example, in the film layer above the connecting line 4, a protrusion will be formed at the position directly above the connecting line 4 compared to the position that does not overlap with the connecting line 4.

[0035] In this embodiment of the invention, while the connecting line 4 electrically connects the second electrode 122 and the pixel driving circuit 11, the connecting line 4 is positioned to avoid the pixel opening 2311. This avoids the connecting line 4 affecting the flatness of the first electrode 121, and improves the intensity consistency of the wide-viewing-angle light emitted by the light-emitting element 12 propagating in different directions. This is beneficial for improving the consistency of the emitted color of the display panel at wide viewing angles in different directions. Wide-viewing-angle light refers to light with a large angle between its propagation direction and the normal to the plane of the substrate 21, such as greater than 30°, 45°, or 60°. Different directions can include the upper, lower, left, and right sides of the display panel.

[0036] Alternatively, in embodiments of the present invention, the connecting line 4 and the pixel opening 2311 may at least partially overlap in a direction h2 perpendicular to the plane of the substrate 21. For example, as... Figure 6 As shown, Figure 6This is a top view of a pixel opening and connecting line in another display panel provided by an embodiment of the present invention, wherein four pixel openings corresponding to one pixel unit are used as an example. The connecting line 4 includes a first part 41 along a direction h2 perpendicular to the plane where the substrate 21 is located. The first part 41 and the pixel opening 2311 at least partially overlap. The shape of the orthographic projection of the first part 41 onto the plane where the substrate 21 is located includes an axisymmetric figure, and the axis of symmetry of the first part 41 passes through the geometric center C of the pixel opening 2311. Figure 6 The shape of the orthographic projection of the first part 41 onto the plane where the substrate 21 is located includes the axis of symmetry X, which is illustrated along the first direction h11.

[0037] For example, the shape of the orthographic projection of the pixel opening 2311 onto the plane of the substrate 21 includes a regular shape with regular geometry. For instance, the shape of the orthographic projection of the pixel opening 2311 onto the plane of the substrate 21 includes a centrally symmetric shape or an axisymmetric shape with two or more axes of symmetry. For example, the shape of the orthographic projection of the pixel opening 2311 onto the plane of the substrate 21 may include an ellipse, a circle, and a rounded rectangle. For a centrally symmetric shape, its central symmetry point is the geometric center; for an axisymmetric shape with two or more axes of symmetry, the intersection of its two axes of symmetry is the geometric center.

[0038] Alternatively, in embodiments of the present invention, the shape of the orthographic projection of the pixel opening 2311 onto the plane of the substrate may be set to include an asymmetrical irregular geometry, in which case its geometric center may be determined by related techniques.

[0039] When the connecting line 4 and the pixel opening 2311 overlap in the direction h2 perpendicular to the plane of the substrate 21, the embodiment of the present invention makes the orthographic projection of the first part 41 of the connecting line 4 onto the plane of the substrate 21 include an axisymmetric pattern, and makes the axis of symmetry of the first part 41 pass through the geometric center of the pixel opening 2311. This can at least improve the flatness of the portion of the first electrode 121 located on both sides of the first part 41. Furthermore, by making these two parts symmetrically arranged about the axis of symmetry of the first part 41, the intensity of the wide-view light emitted by the light-emitting element 12 that propagates toward both sides of the axis of symmetry of the first part 41 tends to be consistent. This can at least improve the color consistency of the wide-view light emitted by the display panel that propagates toward both sides of the axis of symmetry of the first part 41, and at least avoid the dispersion problem caused by the inconsistent light emitted by the display panel observed by the user in these two positions.

[0040] Optionally, the axis of symmetry of the first part 41 can be parallel to the long side of the display panel, or parallel to the short side of the display panel.

[0041] For example, such as Figure 6As shown, the connecting line 4 also includes a second part 42, which is electrically connected to the first part 41 along a direction h2 perpendicular to the plane where the substrate 21 is located. The second part 42 and the pixel opening 2311 do not overlap at least partially.

[0042] Optionally, for multiple sub-pixels within the same pixel unit, embodiments of the present invention can ensure that the connecting lines and corresponding pixel openings in different sub-pixels have the same positional relationship. Using this configuration, the emitted light rays from multiple sub-pixels with different emitted light colors within the same pixel unit can be combined to form a desired white light.

[0043] For example, such as Figure 5 As shown, in this embodiment of the invention, multiple connection lines 4 corresponding to the same pixel unit and the corresponding pixel opening 2311 can at least partially not overlap in the direction perpendicular to the plane of the substrate.

[0044] or, Figure 6 As shown, in this embodiment of the invention, multiple connecting lines 4 corresponding to the same pixel unit can be arranged to overlap with the corresponding pixel opening 2311 in a direction perpendicular to the plane of the substrate, and the first part 41 of the multiple connecting lines 4 corresponding to multiple sub-pixels in the same pixel unit are parallel to each other.

[0045] It should be noted that, Figure 4 The quadrilateral shape of the second electrode 122 is only one illustration. In this embodiment of the invention, the shape of the second electrode 122 can also be designed in other ways according to different design requirements.

[0046] For example, the driving transistor T1 includes an N-type transistor.

[0047] Optionally, the driving transistor T1 includes an oxide thin-film transistor. Exemplarily, the oxide thin-film transistor includes indium gallium zinc oxide, such as indium gallium zinc oxide (IGZO). By configuring the driving transistor T1 to include an oxide thin-film transistor, this embodiment of the invention can improve the stability of the threshold voltage of the driving transistor T1, which is beneficial for improving the accuracy of the driving current provided by the pixel driving circuit 11 and reducing image retention defects that occur over time.

[0048] It should be noted that, Figure 2 The pixel driving circuit 11 shown is only an illustration. In this embodiment of the invention, more transistors and / or storage capacitors can be set in the pixel driving circuit 11 according to different design requirements. This embodiment of the invention does not limit the specific structure of the pixel driving circuit 11.

[0049] For example, such as Figure 3 As shown, the display panel also includes a color filter (CF) 24 and a light-shielding layer 25. The color filter 24 and the light-shielding layer 25 are located on the side of the pixel definition layer 231 away from the substrate 21. Along the direction h2 perpendicular to the plane where the substrate 21 is located, the color filter 24 at least partially overlaps with the pixel opening 2311.

[0050] like Figure 3 As shown, the light-shielding layer 25 includes a light-shielding opening 250, and along the direction h2 perpendicular to the plane of the substrate 21, the light-shielding opening 250 and the pixel opening 2311 at least partially overlap.

[0051] The light emitted from the light-emitting element 12 passes through the corresponding color resist 24, which improves the accuracy of the emitted color of the light-emitting element 12. Furthermore, the color resist 24 can reduce the reflectivity of the display panel by absorbing incident ambient light. Moreover, based on this arrangement, the color resist 24 is essentially reused as a polarizer, eliminating the need for an additional polarizer on the light-emitting side of the display panel, thus facilitating a reduction in the thickness of the display panel.

[0052] For example, such as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the shape of the orthographic projection of the pixel opening 2311 onto the plane of the substrate 21 includes an arc edge. This arrangement reduces the probability of diffraction effects when the light-emitting element 12 emits light, avoids stripes on the surface of the display panel, and improves the visual effect of the display panel.

[0053] For example, such as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, embodiments of the present invention can make the shape of at least a portion of the pixel openings 2311 projected onto the plane of the substrate 21 include a circle. When setting the light-shielding layer, for example, as... Figure 7 As shown, Figure 7 This is a top view of a light-shielding layer and a pixel opening provided in an embodiment of the present invention. The shape of the edge of the light-shielding opening 250 also includes an arc shape.

[0054] In related technologies, the orthographic projection of the pixel aperture 2311 onto the plane of the substrate 21 is typically a square or polygon with relatively distinct equilateral corners. To reduce ambient light reflection and achieve a seamless black effect on the display panel, a light-shielding layer 25 is usually prepared between adjacent light-emitting elements 12. Furthermore, the shape of the light-shielding opening 250 in the light-shielding layer 25 follows the shape of the light-emitting element 12. When a light-shielding layer 25 is prepared between adjacent square light-emitting elements 12, the light emitted by the light-emitting element 12 through the light-shielding opening 250 in the light-shielding layer 25 is equivalent to passing through a slit, resulting in a diffraction effect. This causes a series of alternating bright and dark stripes on the light-emitting surface of the display panel, affecting the display effect of the display panel.

[0055] In this embodiment of the invention, by making the shape of the orthogonal projection of the pixel opening 2311 onto the plane of the substrate 21 include an arc edge, and by making the shape of the light-shielding opening 250 corresponding to the light-emitting element 12 in the light-shielding layer 25 also include an arc edge when the light-shielding layer 25 is set, the probability of diffraction effect when the light-emitting element 12 emits light can be reduced, avoiding stripes on the surface of the display panel and improving the visual effect of the display panel.

[0056] For example, the shape of the orthographic projection of the light-shielding opening 250 onto the plane of the substrate includes a circle.

[0057] Optionally, the orthographic projection of the light-shielding opening 250 onto the plane of the substrate can cover the orthographic projection of the pixel opening 2311 onto the plane of the substrate.

[0058] For example, in this embodiment of the invention, the pixel definition layer 231 includes a transparent material, or the pixel definition layer 231 includes a light-shielding material; the light-shielding material can absorb ambient light from the outside, as well as ambient light reflected by the metal structure inside the display panel, which is beneficial to reducing the reflectivity of the display panel.

[0059] Optional, such as Figure 1 As shown, the orthographic projection of the first electrode 121 onto the plane of the substrate 21 includes an arc edge. This arrangement improves the uniformity of reflected light intensity from the first electrode 121 propagating in different directions, which helps to improve chromatic aberration in the display panel when the screen is off. Optionally, the orthographic projection of the first electrode 121 onto the plane of the substrate 21 may include a circle.

[0060] For example, such as Figure 1 As shown, the orthographic projection of the first electrode 121 onto the plane of the substrate 21 covers the orthographic projection of the pixel opening 2311 onto the plane of the substrate 21.

[0061] Optional, such as Figure 3As shown, the display panel also includes an encapsulation layer 26, which is located on the side of the second electrode 122 away from the substrate 21. Exemplarily, the encapsulation layer 26 may include at least one inorganic layer and at least one organic layer. Figure 3 The encapsulation layer 26 is illustrated by comprising a first inorganic encapsulation layer 261, an organic encapsulation layer 262, and a second inorganic encapsulation layer 263 stacked together, with the organic encapsulation layer 262 located between the first inorganic encapsulation layer 261 and the second inorganic encapsulation layer 263. The encapsulation layer 26 can protect the light-emitting element 12 from the effects of moisture or oxygen introduced from the outside, which helps to extend the service life of the display panel.

[0062] Optional, such as Figure 3 As shown, the array film layer 22 includes a buffer layer 220, a semiconductor layer 221, a first gate insulating layer 222, a first metal layer 223, a first interlayer insulating layer 224, a second metal layer 225, a second interlayer insulating layer 226, a third metal layer 227, a passivation layer 228, and a planarization layer 229, which are sequentially stacked along a direction away from the substrate 21. The first electrode 121 is located on the side of the planarization layer 229 away from the substrate 21.

[0063] For example, the gates of the aforementioned driving transistor T1 and data writing transistor T2 can be located on the first metal layer 223, one of the plates of the storage capacitor Cst can be located on the second metal layer 225, and the data line ( Figure 3 (Not shown), the source and drain of the driving transistor T1, and the source and drain of the data writing transistor T2 can be located in the third metal layer 227.

[0064] When setting up connection line 4, options include, for example... Figure 3 As shown, along the direction h2 perpendicular to the plane where the substrate 21 is located, in this embodiment of the invention, at least a portion of the connecting line 4 can be located between the planarization layer 229 and the pixel driving circuit 11.

[0065] For example, such as Figure 3 As shown, in this embodiment of the invention, at least a portion of the connecting line 4 can be located between the planarization layer 229 and the passivation layer 228. The orthographic projection of the planarization layer 229 onto the plane of the substrate 21 covers the connecting line 4. The planarization layer 229 can mitigate the unevenness of the first electrode 121 caused by the connecting line 4, and can further improve the brightness consistency of the light-emitting element 12 at large viewing angles in different orientations, thereby improving the consistency of the emitted color of the display panel at large viewing angles in different orientations.

[0066] Optional, such as Figure 3As shown, the display panel includes a first insulating layer 51 and a second insulating layer 52. Along the direction h2 perpendicular to the plane where the substrate 21 is located, the first insulating layer 51 is located between the connecting line 4 and the pixel driving circuit 11, and the second insulating layer 52 is located between the connecting line 4 and the second electrode 122.

[0067] like Figure 3 As shown, the first insulating layer 51 includes a first via K1, which is electrically connected to the connecting line 4 and the pixel driving circuit 11. The second insulating layer 52 includes a second via K2, which is electrically connected to the connecting line 4 and the second electrode 122.

[0068] For example, the first insulating layer 51 may be one or more film layers, and the second insulating layer 52 may include one or more film layers. Figure 3 The first insulating layer 51 includes the passivation layer 228, and the second insulating layer 52 includes the pixel definition layer 231 and the planarization layer 229 as an example.

[0069] like Figure 3 As shown, along the direction h2 perpendicular to the plane where the substrate 21 is located, the first via K1 penetrates the passivation layer 228, and the second via K2 penetrates the pixel definition layer 231 and the planarization layer 229.

[0070] When setting the first via K1 and the second via K2, for example, as follows: Figure 5 and Figure 6 As shown, along direction h2 perpendicular to the plane of substrate 21, the first via K1 and the second via K2 do not overlap at least partially. Figure 5 and Figure 6 The diagram illustrates a first via K1 and a second via K2 located on either side of a pixel opening 2311 along the first direction h11. This arrangement increases the distance between the first via K1 and the second via K2 in the direction parallel to the plane of the substrate 21, allowing them to be more dispersed. This avoids the problem of excessively deep vias caused by a concentration of the first via K1 and the second via K2 in a single location, thus reducing the difficulty of via fabrication.

[0071] Optional, such as Figure 5 and Figure 6 As shown, the line connecting the geometric centers of the first via K1 and the second via K2 passes through the geometric center C of the pixel opening 2311. This arrangement helps to improve the symmetry of the connecting line 4 between the first via K1 and the second via K2 with respect to the pixel opening 2311, thereby further improving the brightness consistency of the light-emitting element 12 at large viewing angles in different orientations and enhancing the color consistency of the display panel at large viewing angles in different orientations.

[0072] When the first portion 41 and the pixel opening 2311 are configured to at least partially overlap along a direction h2 perpendicular to the plane of the substrate 21, for example, as shown... Figure 6 As shown, in embodiments of the present invention, the first part 41 may include one or more axes of symmetry X. Figure 6 The diagram illustrates a first axis of symmetry X1, which extends along a first direction h11, with the axis of symmetry X being an integral part of the first axis of symmetry X. Alternatively, as shown... Figure 8 As shown, Figure 8 This is a top view of another pixel opening and connecting line provided in an embodiment of the present invention. In this embodiment of the present invention, the axis of symmetry X may also include a second axis of symmetry X2, which extends along the second direction h12.

[0073] For example, such as Figure 1 As shown, the plurality of sub-pixels 10 include a first sub-pixel 101, a second sub-pixel 102 and a third sub-pixel 103; wherein, the first sub-pixel 101 and the third sub-pixel 103 are arranged along a first direction h11, and the first sub-pixel 101 and the second sub-pixel 102 are arranged along a second direction h12.

[0074] This embodiment of the invention ensures that the orthographic projection of the first portion 41 onto the plane of the substrate 21 includes at least a first axis of symmetry X1 extending along the first direction h11. This allows the portions of the first electrode 121 of the light-emitting element 12 located on both sides of the first axis of symmetry X1 to be symmetrically arranged, and both have high flatness. From the user's perspective, the display panel can be viewed from both sides along the second direction h12. Figure 1 Taking the indicated orientation as an example, when the user views the display panel from the top down or from the bottom up, the light intensity received by the light-emitting element 12 at wide viewing angles can tend to be consistent. This can improve the color consistency of the display panel at wide viewing angles in the top and bottom orientations, and at least avoid the color dispersion problem caused by the color inconsistency of the display panel at wide viewing angles in the top and bottom orientations.

[0075] Alternatively, in this embodiment of the invention, the orthographic projection of the first portion 41 onto the plane of the substrate 21 may include at least a second axis of symmetry X2 extending along the second direction h12, so that the portions of the first electrode 121 of the light-emitting element 12 located on both sides of the second axis of symmetry X2 in the first direction h11 are symmetrically arranged, and both have high flatness. From the user's perspective, on both sides of the display panel in the first direction h11,... Figure 1Taking the indicated orientation as an example, when the user views the display panel from left to right or from right to left, the light intensity emitted by the light-emitting element 12 at wide viewing angles can be made more consistent. This can improve the color consistency of the display panel at wide viewing angles from the left and right sides, and at least avoid the color dispersion problem caused by the color inconsistency of the display panel at wide viewing angles from the left and right sides.

[0076] In another alternative embodiment, the present invention may also include at least two axes of symmetry in the orthographic projection of the first portion 41 onto the plane containing the substrate 21. For example, as shown... Figure 9 and Figure 10 As shown, Figure 9 and Figure 10 The above-view schematic diagrams of two other pixel openings and connecting lines provided in the embodiments of the present invention are shown. The orthographic projection of the first portion 41 onto the plane where the substrate 21 is located includes a first axis of symmetry X1 and a second axis of symmetry X2 intersecting the geometric center C of the pixel opening 2311. For example, the first axis of symmetry X1 may be parallel to a first direction h11, and the second axis of symmetry X2 may be parallel to a second direction h12.

[0077] This configuration improves the symmetry of the first part 41 relative to the pixel opening 2311, which helps to improve the brightness consistency of the light-emitting element 12 under different orientations and large viewing angles, and improves the color consistency of the display panel under different orientations and large viewing angles. Figure 9 Taking the first part 41 extending along the first direction h11 as an illustration, Figure 10 The first part 41 extends along the second direction h12 as an illustration.

[0078] For example, such as Figure 9 and Figure 10 As shown, in this embodiment of the invention, the width of the first part 41 can be made equal at different positions, wherein the width direction of the first part 41 is perpendicular to the extension direction.

[0079] In another alternative implementation, such as Figure 11 As shown, Figure 11 This is a top view schematic diagram of another pixel opening and connecting line provided in an embodiment of the present invention. In this embodiment, the first portion 41 may also include at least a first sub-portion 411 and a second sub-portion 412, wherein the width of the first sub-portion 411 and the width of the second sub-portion 412 are different. Figure 11The first sub-part 411 and the second sub-part 412 are arranged along the first direction h11, with the width of the first sub-part 411 being greater than the width of the second sub-part 412, as illustrated in the diagram. Alternatively, in this embodiment of the invention, the first sub-part 411 and the second sub-part 412 may be arranged along the second direction h12, which will not be illustrated in the accompanying drawings here.

[0080] For example, such as Figure 6 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in this embodiment of the invention, the orthographic projection of the first part 41 onto the plane where the substrate 21 is located can cover the geometric center C of the pixel opening 2311.

[0081] Or, such as Figure 12 and Figure 13 As shown, Figure 12 and Figure 13 The above view shows two other pixel openings and connecting lines provided in the embodiments of the present invention. In the embodiments of the present invention, the shape of the orthographic projection of the first part 41 on the plane where the substrate is located can be set to include a ring, wherein the orthographic projection of the first part 41 on the plane where the substrate 21 is located surrounds the geometric center C of the pixel opening 2311. Figure 12 The orthographic projection of the first portion 41 onto the plane where the substrate 21 is located includes a first sub-part 411 and a second sub-part 412 arranged along the first direction h11. The first sub-part 411 includes a square ring as an illustration. Figure 13 The orthographic projection of the first portion 41 onto the plane where the substrate 21 is located includes a first sub-part 411 and a second sub-part 412 arranged along the second direction h12. The first sub-part 411 includes a ring as an illustration.

[0082] In this embodiment of the invention, by setting the shape of the orthographic projection of the first part 41 onto the plane of the substrate 21 to include a ring, the light intensity of the large-view light emitted by the light-emitting element 12 propagating in different directions tends to be consistent, improving the dispersion problem. At the same time, it can connect the parts of the connecting line 4 located on both sides of the geometric center of the pixel opening 2311 in parallel, which is beneficial to reduce the resistance of the connecting line 4.

[0083] For example, such as Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13As shown, in this embodiment of the invention, the orthographic projection of the connecting line 4 onto the plane of the substrate 21 can be a centrally symmetrical pattern, and its center of symmetry coincides with the geometric center C of the pixel opening 2311. This arrangement further enhances the symmetry of the first part 41 relative to the pixel opening 2311, which is beneficial for improving the brightness consistency of the light-emitting element 12 at large viewing angles in different orientations, and improving the color consistency of the display panel at large viewing angles in different orientations.

[0084] For example, such as Figure 14 As shown, Figure 14 This is a schematic diagram of another display panel provided in an embodiment of the present invention. The display panel further includes multiple scan lines S and multiple data lines Data, and the scan lines S and data lines Data are connected to the aforementioned pixel driving circuit ( Figure 14 (Not shown) Electrical connection, one of the first direction h11 and the second direction h12 is parallel to the extension direction of the data line Data, and the other is parallel to the extension direction of the scan line S. Figure 14 The diagram illustrates a scan line S extending along the first direction h11, multiple scan lines S arranged along the second direction h12, and data lines Data extending along the second direction h12, with multiple data lines Data arranged along the first direction h11.

[0085] like Figure 14 As shown, scan lines S are electrically connected to a plurality of sub-pixels 10 arranged along the first direction h11, and data lines Data are electrically connected to a plurality of sub-pixels 10 arranged along the second direction h12. When the display panel is working, data lines Data provide data voltage, and multiple scan lines S sequentially provide control signals to control the sub-pixels 10 to start charging, so that the corresponding sub-pixels 10 are charged with the data voltage provided by data lines Data and lit up at the required brightness.

[0086] Based on the same inventive concept, embodiments of the present invention also provide a display device, such as... Figure 15 As shown, Figure 15 This is a schematic diagram of a display device provided in an embodiment of the present invention. The display device includes the display panel described above. The specific structure of the display panel 100 has been described in detail in the above embodiments and will not be repeated here. Of course, Figure 15 The display device shown is for illustrative purposes only. The display device can be any electronic device with display function, such as a mobile phone, tablet computer, laptop computer, e-reader or television.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that, include: Substrate; A plurality of sub-pixels located on one side of the substrate, each sub-pixel including a pixel driving circuit; A pixel definition layer located on the side of the pixel driving circuit away from the substrate, the pixel definition layer including a pixel opening; A light-emitting element includes a first electrode and a second electrode, at least a portion of the first electrode being exposed by the pixel opening; the second electrodes of different light-emitting elements are spaced apart; A connecting line electrically connects the second electrode to the pixel driving circuit; Along a direction perpendicular to the plane of the substrate, the connecting line and the pixel opening at least partially do not overlap; or, The connecting line includes a first portion along a direction perpendicular to the plane of the substrate, the first portion and the pixel opening at least partially overlap, the first portion includes an axisymmetric pattern, and the axis of symmetry of the first portion passes through the geometric center of the pixel opening.

2. The display panel according to claim 1, characterized in that, The pixel driving circuit includes a driving transistor, which includes an oxide thin-film transistor.

3. The display panel according to claim 1, characterized in that, The shape of the pixel opening in the orthographic projection onto the plane of the substrate includes an arc edge.

4. The display panel according to claim 1, characterized in that, It also includes a color resist and a light-shielding layer, both of which are located on the side of the pixel definition layer away from the substrate. The light-shielding layer includes a light-shielding opening along a direction perpendicular to the plane of the substrate. Both the color resist and the light-shielding opening at least partially overlap with the pixel opening. The shape of the edge of the light-shielding opening includes a curved edge.

5. The display panel according to claim 1, characterized in that, It includes a first via and a second via, wherein the first via is electrically connected to the connecting line and the pixel driving circuit, and the second via is electrically connected to the connecting line and the second electrode; The line connecting the geometric centers of the first via and the second via passes through the geometric center of the pixel opening.

6. The display panel according to claim 1, characterized in that, The connecting line includes a first portion along a direction perpendicular to the plane of the substrate. The first portion and the pixel opening at least partially overlap. The orthographic projection of the first portion onto the plane of the substrate includes at least a first axis of symmetry and / or a second axis of symmetry. The extension direction of the first axis of symmetry is parallel to a first direction, and the extension direction of the second axis of symmetry is parallel to a second direction. The first direction and the second direction intersect, and both the first axis of symmetry and the second axis of symmetry pass through the geometric center of the pixel opening.

7. The display panel according to claim 6, characterized in that, The plurality of said sub-pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel; The first sub-pixel and the third sub-pixel are arranged along the first direction, and the first sub-pixel and the second sub-pixel are arranged along the second direction.

8. The display panel according to claim 6, characterized in that, The shape of the first part in the orthographic projection onto the plane of the substrate includes a centrally symmetric pattern, and the center of symmetry of the first part coincides with the geometric center of the pixel opening.

9. The display panel according to claim 6, characterized in that, The shape of the first portion as an orthographic projection onto the plane of the substrate includes an annulus, the annulus surrounding the geometric center of the pixel opening.

10. The display panel according to claim 6, characterized in that, The display panel also includes data lines and scan lines. One of the first direction and the second direction is parallel to the extension direction of the data line, and the other is parallel to the extension direction of the scan line.

11. The display panel according to claim 1, characterized in that, It also includes a planarization layer, with the connection line located between the pixel driving circuit and the planarization layer.

12. The display panel according to claim 1, characterized in that, Along a direction perpendicular to the plane of the substrate, the connecting line and the pixel opening do not overlap at least partially; The display panel includes multiple pixel units, which are arranged in an array along a first direction and a second direction. The pixel unit includes a plurality of sub-pixels; the display panel includes a plurality of connecting lines corresponding to the plurality of sub-pixels in the same pixel unit; along a direction perpendicular to the plane of the substrate, the plurality of connecting lines and the corresponding pixel openings do not overlap at least partially.

13. The display panel according to claim 1, characterized in that, The connecting line includes a first portion along a direction perpendicular to the plane of the substrate. The first portion and the pixel opening at least partially overlap. The first portion includes an axisymmetric pattern, and the axis of symmetry of the first portion passes through the geometric center of the pixel opening. The display panel includes multiple pixel units, which are arranged in an array along a first direction and a second direction. The pixel unit includes a plurality of sub-pixels; the display panel includes a plurality of connecting lines corresponding to the plurality of sub-pixels in the same pixel unit; and, along a direction perpendicular to the plane of the substrate, the plurality of first portions and the corresponding pixel openings at least partially overlap, and the axes of symmetry of the plurality of first portions are parallel to each other.

14. The display panel according to claim 1, characterized in that, The shape of the orthographic projection of the first electrode onto the plane of the substrate includes an arc edge.

15. A display device, characterized in that, Includes the display panel as described in any one of claims 1-14.

Images