Array substrate and display device

Abstract

SOLUTION: An array board includes a sub-pixel 11 that is positioned in a display area B1 and includes a light emitting element including a first electrode, a light emitting layer, and a second electrode, a positive power line 12 that is positioned in the display area and is electrically connected to the first electrode, a positive power supply bus 13 that is positioned in a peripheral area B2 and is electrically connected to the positive power line, three positive power supply access terminals 14, 15, 16 that are positioned in a side separated from the positive power supply bus and are electrically connected to the positive supply bus each, a negative power line 17 positioned in the peripheral area, auxiliary electrodes 18 that are positioned in the peripheral area and is electrically connected to the negative power line and the second electrode each, three negative power supply access terminals 19, 20, 21 that are positioned in a side separated from the display area of the positive power supply bus and are electrically connected to the negative power line each, and negative power supply auxiliary lines 22 that are positioned in the peripheral area and is electrically connected to the negative power supply access terminal 20 and the auxiliary electrodes each.EFFECT: An array board is advantageous for securing uniformity in luminance of a displayed screen.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] As the size of the array substrate increases, the length and load of the signal transmission lines outside the display area of ​​the array substrate also increase. If the impedance of the signal transmission line for transmitting the positive voltage signal (VDD) or the signal transmission line for transmitting the negative voltage signal (VSS) is too large, the screen displayed on the array substrate is likely to have uneven brightness. Summary of the Invention [Means for solving the problem]

[0003] The embodiments of the present application provide an array substrate and a display device.

[0004] In one aspect, an array substrate is provided, the array substrate comprising: a base substrate including a display area including a first boundary, a second boundary, a third boundary, and a fourth boundary, and a peripheral area surrounding the display area; a plurality of sub-pixels in the display area, the plurality of sub-pixels including a light-emitting element including a first electrode, a light-emitting layer, and a second electrode on which at least one of the plurality of sub-pixels is stacked; a plurality of positive power lines in the display area and electrically connected to the plurality of sub-pixels; and a positive power line in the peripheral area, extending along the first boundary, the positive power line being electrically connected to the plurality of positive power lines. a first positive power supply access terminal and a second positive power supply access terminal on a side of the positive power supply bus in the peripheral region away from the display region and electrically connected to the positive power supply bus, respectively; a negative power supply line in the peripheral region and surrounding the second boundary, the third boundary, and the fourth boundary; an auxiliary electrode in the peripheral region and surrounding the first boundary, the second boundary, the third boundary, and the fourth boundary and electrically connected to the negative power supply line and the second electrode, respectively; a first negative power supply access terminal, a second negative power supply access terminal, a third negative power supply access terminal and a fourth negative power supply access terminal on a side of the first positive power supply access terminal away from the second positive power supply access terminal, the second negative power supply access terminal being between the first positive power supply access terminal and the second positive power supply access terminal, the third negative power supply access terminal being on a side of the second positive power supply access terminal away from the first positive power supply access terminal, and the fourth negative power supply access terminal being between the second negative power supply access terminal and the third negative power supply access terminal, the first negative power supply access terminal and the third negative power supply access terminal being electrically connected to the negative power supply line, respectively; and a negative power supply auxiliary line in the peripheral region between the second negative power supply access terminal and the fourth negative power supply access terminal along a first direction and between the positive power supply bus and the second negative power supply access terminal along a second direction intersecting the first direction, one terminal of the negative power supply auxiliary line being connected to the second negative power supply access terminal;and a negative power auxiliary line, the other terminal of which is connected to the fourth negative power access terminal, the negative power auxiliary line is electrically connected to the auxiliary electrode, and the orthogonal projection of the negative power auxiliary line on the base substrate overlaps with the orthogonal projection of the auxiliary electrode on the base substrate.

[0005] Optionally, the negative power supply auxiliary line includes a first portion arranged along a second direction and a second portion connected to the first portion, and a length of the first portion in the first direction is shorter than a length of the second portion in the first direction.

[0006] Optionally, the negative power supply auxiliary line includes a first portion arranged along a second direction and a second portion connected to the first portion, and a length of the first portion in the second direction is shorter than a length of the second portion in the second direction.

[0007] Optionally, the first positive power supply access terminal and the second positive power supply access terminal are configured to transmit a positive voltage signal to a first electrode of the light-emitting element via the positive power supply bus and the positive power supply line, the first negative power supply access terminal and the third negative power supply access terminal are configured to transmit a negative voltage signal to the second electrode of the light-emitting element via the negative power supply line and the auxiliary electrode, and the second negative power supply access terminal and the fourth negative power supply access terminal are configured to transmit a negative voltage signal to the second electrode of the light-emitting element via the negative power supply auxiliary line and the auxiliary electrode.

[0008] Alternatively, the first positive power supply access terminal and the second positive power supply access terminal are arranged symmetrically with respect to the auxiliary negative power supply line, and / or the first negative power supply access terminal and the third negative power supply access terminal are arranged symmetrically with respect to the auxiliary negative power supply line, and / or the second negative power supply access terminal and the fourth negative power supply access terminal are arranged symmetrically with respect to the auxiliary negative power supply line.

[0009] Optionally, the first positive power supply access terminal and the second positive power supply access terminal are of an integrated structure.

[0010] Optionally, at least one of the first positive power supply access terminal, the second positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal has a polygonal line shape when projected orthogonally onto the base substrate.

[0011] Optionally, the first negative power supply access terminal, the third negative power supply access terminal and the negative power supply line are integrated into one structure, or the negative power supply auxiliary line, the second negative power supply access terminal and the fourth negative power supply access terminal are integrated into one structure.

[0012] Optionally, the auxiliary electrode is in the shape of a closed ring, said auxiliary electrode surrounding said display area.

[0013] Optionally, at least one of the plurality of sub-pixels includes a thin film transistor and a connecting electrode, the thin film transistor including an active layer on the base substrate, a gate on a side of the active layer away from the base substrate, and a source and a drain on a side of the gate away from the base substrate.

[0014] Optionally, the positive power bus includes a positive power bus first sub-layer and a positive power bus second sub-layer that are electrically connected, the positive power bus first sub-layer being located in the same layer as one of the source and the drain, and the positive power bus second sub-layer being in the same layer as the connection electrode.

[0015] Optionally, the positive power bus first sub-layer and the positive power bus second sub-layer are electrically connected through a positive power bus via.

[0016] Optionally, the negative power line includes a negative power line first sub-layer and a negative power line second sub-layer, which are electrically connected, and the negative power auxiliary line includes a negative power auxiliary line first sub-layer and a negative power auxiliary line second sub-layer, which are electrically connected, the negative power line first sub-layer and the negative power auxiliary line first sub-layer are both in the same layer as one of the source and the drain, and the negative power line second sub-layer and the negative power auxiliary line second sub-layer are both in the same layer as the connection electrode.

[0017] Optionally, the negative power line first sub-layer and the negative power line second sub-layer are electrically connected through a negative power line via, and the negative power auxiliary line first sub-layer and the negative power auxiliary line second sub-layer are electrically connected through a negative power auxiliary line via.

[0018] Optionally, at least one of the plurality of sub-pixels includes a thin film transistor, the thin film transistor including an active layer on the base substrate, a gate on a side of the active layer away from the base substrate, and a source and a drain on a side of the gate away from the base substrate, the first positive power supply access terminal and the second positive power supply access terminal both being in the same layer as one of the source and the drain.

[0019] Optionally, at least one of the plurality of sub-pixels includes a thin film transistor, the thin film transistor including an active layer on the base substrate, a gate on a side of the active layer away from the base substrate, and a source and a drain on a side of the gate away from the base substrate, and the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal are all in the same layer as one of the source and the drain.

[0020] Optionally, the negative power auxiliary line includes a negative power auxiliary line first sub-layer and a negative power auxiliary line second sub-layer which are electrically connected, and the second negative power access terminal, the fourth negative power access terminal and the negative power auxiliary line first sub-layer are an integrated structure.

[0021] Optionally, the display device further includes a circuit board located on a side of the peripheral area away from the display area of ​​the first positive power supply access terminal, the second positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal, to which the first positive power supply access terminal, the second positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal are electrically connected, respectively.

[0022] The auxiliary electrode is on the side of the negative power supply line remote from the base substrate and is electrically connected to the negative power supply auxiliary line through a negative power supply auxiliary via.

[0023] In another aspect, there is provided a display device including the array substrate of any one of the above aspects. [Brief description of the drawings]

[0024] In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces the drawings necessary for the description of the embodiments. It goes without saying that the drawings in the following description are only some of the embodiments described in the present application, and those skilled in the art can obtain other drawings based on these drawings without making creative efforts. [Figure 1] FIG. 2 is a front view of an array substrate according to an embodiment of the present application. [Diagram 2] FIG. 13 is a front view of another array substrate according to an embodiment of the present application. [Diagram 3] FIG. 13 is a front view of yet another array substrate according to an embodiment of the present application. [Figure 4] FIG. 2 is a front view of a further array substrate according to an embodiment of the present application. [Diagram 5] 5 is a cross-sectional view of aa portion, bb portion, cc portion, and ee portion of the array substrate shown in any one of FIGS. 1 to 4. FIG. [Figure 6] 2 is a cross-sectional view of aa portion and ff portion of the array substrate shown in FIG. [Figure 7] 3 is a cross-sectional view of aa portion and ff portion of the array substrate shown in FIG. 2. [Figure 8] 4 is a cross-sectional view of aa portion and ff portion of the array substrate shown in FIG. [Figure 9] 5 is a cross-sectional view of aa portion and ff portion of the array substrate shown in FIG. [Figure 10] 5 is a cross-sectional view of aa portion and gg portion of the array substrate shown in FIG. 3 or FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] In order to make the principles, technical solutions and advantages of the present application clearer, the embodiments of the present application are described in more detail below with reference to the accompanying drawings.

[0026] The embodiment of the present application provides an array substrate, in which the impedances of a signal transmission line for transmitting a positive voltage signal to a sub-pixel and a signal transmission line for transmitting a negative voltage signal to a sub-pixel are both reduced, which is advantageous in improving the situation in which brightness unevenness is likely to occur on a screen displayed on the array substrate, and ensures the uniformity of the brightness of the screen displayed on the array substrate.

[0027] In an embodiment of the present application, the array substrate includes a base substrate including a display area including a first boundary, a second boundary, a third boundary, and a fourth boundary, and a peripheral area surrounding the display area; a plurality of sub-pixels located in the display area, at least one of the plurality of sub-pixels including a light-emitting element, the light-emitting element being stacked in sequence on a first electrode, a light-emitting layer, and a second electrode; a plurality of positive power lines located in the display area and electrically connected to the first electrode; and a plurality of positive power lines located in the peripheral area and distributed along the first boundary, the plurality of positive power lines being electrically connected to the first electrode. a first positive power supply access terminal, a second positive power supply access terminal, and a third positive power supply access terminal located on a side of the positive power supply bus away from the display area, the second positive power supply access terminal being located between the first positive power supply access terminal and the third positive power supply access terminal, the first positive power supply access terminal, the second positive power supply access terminal, and the third positive power supply access terminal being electrically connected to the positive power supply bus, respectively; a negative power supply line surrounding the first boundary, the third boundary, and the fourth boundary; an auxiliary electrode located in the peripheral region and surrounding the first boundary, the second boundary, the third boundary, and the fourth boundary, and electrically connected to the negative power supply line and the second electrode, respectively; a first negative power supply access terminal, a second negative power supply access terminal, and a third negative power supply access terminal located on a side of the positive power supply bus away from the display region, wherein the first negative power supply access terminal is located on a side of the first positive power supply access terminal away from the second positive power supply access terminal, and the second negative power supply access terminal is located on the first positive power supply access terminal away from the second positive power supply access terminal, a first negative power supply access terminal, a second negative power supply access terminal, and a third negative power supply access terminal, each of which is electrically connected to the negative power supply line, located between a positive power supply access terminal and the third positive power supply access terminal, the third negative power supply access terminal being located on a side of the third positive power supply access terminal away from the second positive power supply access terminal, the first negative power supply access terminal and the third negative power supply access terminal being located in the peripheral area, between the first positive power supply access terminal and the third positive power supply access terminal and between the positive power supply bus and the second negative power supply access terminal;a negative power supply auxiliary line electrically connected to the second negative power supply access terminal and the auxiliary electrode,

[0028] Optionally, the first positive power supply access terminal, the second positive power supply access terminal, and the third positive power supply access terminal are configured to transmit a positive voltage signal to the light-emitting element via the positive power supply bus, the positive power supply line, and the first electrode, and the first negative power supply access terminal, the second negative power supply access terminal, and the third negative power supply access terminal are configured to transmit a negative voltage signal to the light-emitting element via the negative power supply line, the negative power supply auxiliary line, the auxiliary electrode, and the second electrode.

[0029] 1 to 4, which are front views of four array substrates according to the embodiments of the present application, each of the array substrates includes a base substrate 10, a plurality of sub-pixels 11, a plurality of positive power supply lines 12, a positive power supply bus 13, a first positive power supply access terminal 14, a second positive power supply access terminal 15, a third positive power supply access terminal 16, a negative power supply line 17, an auxiliary electrode 18, a first negative power supply access terminal 19, a second negative power supply access terminal 20, a third negative power supply access terminal 21, and a negative power supply auxiliary line 22, as shown in FIG.

[0030] The base substrate 10 includes a display region B1 and a peripheral region B2 surrounding the display region B1, and the display region B1 includes a first boundary (not shown in FIGS. 1 to 4), a second boundary (not shown in FIGS. 1 to 4), a third boundary (not shown in FIGS. 1 to 4), and a fourth boundary (not shown in FIGS. 1 to 4). Note that in the embodiment of the present application, a case in which the peripheral region B2 surrounds the four sides of the display region B1 will be described as an example.

[0031] The sub-pixels 11 are located in the display region B1, and at least one of the sub-pixels 11 includes a light-emitting element (not shown in FIGS. 1 to 4), which includes a first electrode (not shown in FIGS. 1 to 4), a light-emitting layer (not shown in FIGS. 1 to 4), and a second electrode (not shown in FIGS. 1 to 4) that are stacked in this order. The sub-pixels 11 can emit light to achieve a display function.

[0032] A plurality of positive power supply lines 12 are located in the display area B1 and are electrically connected to the first electrodes of the light emitting elements.

[0033] The positive power buses 13 are located in the peripheral area B2 and distributed along the first boundary of the display area B1, and are electrically connected to the plurality of positive power lines 12.

[0034] The first positive power supply access terminal 14, the second positive power supply access terminal 15, and the third positive power supply access terminal 16 are located on the side of the positive power supply bus 13 away from the display area B1, and the second positive power supply access terminal 15 is located between the first positive power supply access terminal 14 and the third positive power supply access terminal 16, and the first positive power supply access terminal 14, the second positive power supply access terminal 15, and the third positive power supply access terminal 16 are each electrically connected to the positive power supply bus 13.

[0035] The negative power supply line 17 is located in the peripheral region B2 and surrounds the second boundary, the third boundary, and the fourth boundary in the display region B1.

[0036] The auxiliary electrode 18 is located in the peripheral region B2 and surrounds the first boundary, the second boundary, the third boundary, and the fourth boundary of the display region B1. The auxiliary electrode 18 is electrically connected to the negative power line 17 and the second electrode of the light-emitting element, respectively.

[0037] The first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21 are located on the side of the positive power supply bus 13 away from the display area B1, with the first negative power supply access terminal 19 located on the side of the first positive power supply access terminal 14 away from the second positive power supply access terminal 15, the second negative power supply access terminal 20 located between the first positive power supply access terminal 14 and the third positive power supply access terminal 16, and the third negative power supply access terminal 21 located on the side of the third positive power supply access terminal 16 away from the second positive power supply access terminal 15, and the first negative power supply access terminal 19 and the third negative power supply access terminal 21 are each electrically connected to the negative power supply line 17. Note that in the embodiment of the present application, a case in which the second negative power supply access terminal 20 is located between the second positive power supply access terminal 15 and the third positive power supply access terminal 16 will be described as an example.

[0038] The negative power supply auxiliary line 22 is located in the peripheral region B2, between the first positive power supply access terminal 14 and the third positive power supply access terminal 16 and between the positive power supply bus 13 and the second negative power supply access terminal 20, and is electrically connected to the second negative power supply access terminal 20 and the auxiliary electrode 18, respectively.

[0039] Optionally, the first positive power supply access terminal 14, the second positive power supply access terminal 15, and the third positive power supply access terminal 16 are configured to transmit a positive voltage signal to the light-emitting element via the positive power supply bus 13, the positive power supply line 12, and the first electrode, and the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21 are configured to transmit a negative voltage signal to the light-emitting element via the negative power supply line 17, the negative power supply auxiliary line 22, the auxiliary electrode 18, and the second electrode.

[0040] 1 to 4, in the first positive power supply access terminal 14, the second positive power supply access terminal 15, and the third positive power supply access terminal 16, each positive power supply access terminal is configured to transmit a positive voltage signal to a light-emitting element where the first electrode is located via a positive power supply bus 13, a positive power supply line 12, and a first electrode electrically connected to the positive power supply line 12, and the positive voltage signal at each positive power supply access terminal is transmitted to the positive power supply line 12 close to the positive power supply access terminal via the positive power supply bus 13 and transmitted to a light-emitting element electrically connected to the positive power supply line 12. For example, the positive voltage signals at the first positive power supply access terminal 14 and the third positive power supply access terminal 16 are transmitted to light-emitting elements electrically connected to the positive power supply lines 12 on both the left and right sides (both the left and right sides of the arrangement position shown in FIGS. 1 to 4) via the positive power supply bus 13, and the positive voltage signal at the second positive power supply access terminal 15 is transmitted to a light-emitting element electrically connected to the positive power supply line 12 in the central region (the central region of the arrangement position shown in FIGS. 1 to 4) via the positive power supply bus 13. In this way, the path along which the positive voltage signal is transmitted to the light-emitting element by the positive power supply access terminal is shortened, the signal transmission line for transmitting the positive voltage signal to the light-emitting element is shortened, and the impedance is reduced, which is advantageous in ensuring uniformity in the brightness of the screen displayed on the array substrate.

[0041] As can be easily understood by those skilled in the art, the first positive power supply access terminal 14, the second positive power supply access terminal 15, and the third positive power supply access terminal 16 simultaneously transmit positive voltage signals to the light emitting elements of all sub-pixels on the array substrate, however, since the first positive power supply access terminal 14 and the third positive power supply access terminal 16 are close to the light emitting elements on both the left and right sides, the positive voltage signals from the first positive power supply access terminal 14 and the third positive power supply access terminal 16 are transmitted to the light emitting elements on both the left and right sides through a short path and with a small impedance, whereas the second positive power supply access terminal 15 is close to the light emitting element in the central region, the positive voltage signal from the second positive power supply access terminal 15 is transmitted to the light emitting element in the central region through a short path and with a small impedance.

[0042] 1 to 4, of the first negative power supply access terminal 19 and the third negative power supply access terminal 21, each negative power supply access terminal is configured to transmit a negative voltage signal to the light-emitting element via the negative power supply line 17, the auxiliary electrode 18, and the second electrode, and the second negative power supply access terminal 20 is configured to transmit a negative voltage signal to the light-emitting element via the negative power supply auxiliary line 22, the auxiliary electrode 18, and the second electrode. The negative voltage signals at the first negative power supply access terminal 19 and the third negative power supply access terminal 21 are transmitted to the light-emitting elements on both the left and right sides (both the left and right sides of the arrangement shown in FIGS. 1 to 4) via the negative power supply line 17 and the auxiliary electrode 18, and the negative voltage signal at the second negative power supply access terminal 20 is transmitted to the light-emitting element in the central region (the central region of the arrangement shown in FIGS. 1 to 4) via the negative power supply auxiliary line 22 and the auxiliary electrode 18. In this way, the path along which the negative voltage signal is transmitted from the negative power supply access terminal to the light-emitting element is shortened, the signal transmission line for transmitting the negative voltage signal to the light-emitting element is shortened, and the impedance is small, which is advantageous in ensuring uniformity in the brightness of the screen displayed on the array substrate.

[0043] As can be easily understood by those skilled in the art, the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21 simultaneously transmit negative voltage signals to the light emitting elements of all sub-pixels on the array substrate, however, since the first negative power supply access terminal 19 and the third negative power supply access terminal 21 are close to the light emitting elements on both the left and right sides, the negative voltage signals from the first negative power supply access terminal 19 and the third negative power supply access terminal 21 are transmitted to the light emitting elements on both the left and right sides through a short path and with a small impedance, whereas the second negative power supply access terminal 20 is close to the light emitting element in the central region, the negative voltage signal from the second negative power supply access terminal 20 is transmitted to the light emitting element in the central region through a short path and with a small impedance.

[0044] As described above, the array substrate according to the embodiment of the present application includes a first positive power supply access terminal, a second positive power supply access terminal, a third positive power supply access terminal, a first negative power supply access terminal, a second negative power supply access terminal, and a third negative power supply access terminal, the second positive power supply access terminal and the second negative power supply access terminal are all located between the first positive power supply access terminal and the third positive power supply access terminal, each positive power supply access terminal can transmit a positive voltage signal to a light emitting element of a sub-pixel nearby thereto through a positive power supply bus and a positive power supply line, and each negative power supply access terminal can transmit a negative voltage signal to a light emitting element of a sub-pixel nearby thereto through a negative power supply line, a negative power supply auxiliary line, and an auxiliary electrode, so that the length of the signal transmission line for transmitting the positive voltage signal to the light emitting element and the signal transmission line for transmitting the negative voltage signal to the light emitting element are both short and have small impedance, which is advantageous to ensure the uniformity of brightness of the screen displayed on the array substrate.

[0045] Optionally, in an embodiment of the present application, the array substrate further includes a fourth positive power supply access terminal located on a side of the positive power supply bus away from the display area and between the first positive power supply access terminal and the third positive power supply access terminal, and electrically connected to the positive power supply bus, wherein the fourth positive power supply access terminal is configured to transmit a positive voltage signal to the light-emitting element via the positive power supply bus, the positive power supply line, and the first electrode.

[0046] For example, as shown in FIG. 2, in addition to FIG. 1, the array substrate further includes a fourth positive power supply access terminal 23 located on the side of the positive power supply bus 13 away from the display area B1 and between the first positive power supply access terminal 14 and the third positive power supply access terminal 16, and electrically connected to the positive power supply bus 13, and the fourth positive power supply access terminal 23 is configured to transmit a positive voltage signal to the light-emitting element via the positive power supply bus 13, the positive power supply line 12, and the first electrode.

[0047] For example, as shown in Fig. 2, the fourth positive power supply access terminal 23 may be located between the second negative power supply access terminal 20 and the third positive power supply access terminal 16, and the fourth positive power supply access terminal 23 and the second positive power supply access terminal 15 may be symmetrical. The positive voltage signals at the fourth positive power supply access terminal 23 and the second positive power supply access terminal 15 may be transmitted to the light emitting element electrically connected to the positive power supply line 12 in the central region (the central region of the arrangement position shown in Fig. 2) via the positive power supply bus 13. In this way, the passage path of the positive voltage signal transmitted from the positive power supply access terminal to the light emitting element is short, so that the signal transmission line for transmitting the positive voltage signal to the light emitting element is short and the impedance is small, which is advantageous in ensuring the uniformity of the brightness of the screen displayed on the array substrate.

[0048] As can be easily understood by those skilled in the art, the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, and the fourth positive power supply access terminal 23 simultaneously transmit positive voltage signals to the light emitting elements of all sub-pixels on the array substrate. However, since the second positive power supply access terminal 15 and the fourth positive power supply access terminal 23 are close to the light emitting elements in the central region, the positive voltage signals from the second positive power supply access terminal 15 and the fourth positive power supply access terminal 23 are transmitted to the light emitting elements in the central region through a short path with a small impedance.

[0049] Optionally, in an embodiment of the present application, the array substrate further includes a fourth negative power supply access terminal located on a side of the positive power supply bus away from the display area and between the first positive power supply access terminal and the third positive power supply access terminal, the fourth negative power supply access terminal being electrically connected to the negative power supply auxiliary line, and the fourth negative power supply access terminal is configured to transmit a negative voltage signal to the light-emitting element via the negative power supply auxiliary line, the auxiliary electrode, and the second electrode.

[0050] For example, as shown in FIG. 3, in addition to FIG. 1, the array substrate further includes a fourth negative power supply access terminal 24 located on the side of the positive power supply bus 13 away from the display area B1 and between the first positive power supply access terminal 14 and the third positive power supply access terminal 16, and electrically connected to the negative power supply auxiliary line 22, and the fourth negative power supply access terminal 24 is configured to transmit a negative voltage signal to the light-emitting element via the negative power supply auxiliary line 22, the auxiliary electrode 18, and the second electrode.

[0051] For example, as shown in Fig. 3, the fourth negative power supply access terminal 24 is located between the second negative power supply access terminal 20 and the third positive power supply access terminal 16, and the fourth negative power supply access terminal 24 and the second negative power supply access terminal 20 may be symmetrical. The negative voltage signals of the fourth negative power supply access terminal 24 and the second negative power supply access terminal 20 can be transmitted to the light emitting element in the central region (the central region of the arrangement position shown in Fig. 3) via the negative power supply auxiliary line 22 and the auxiliary electrode 18. In this way, the passage path of the negative voltage signal transmitted from the negative power supply access terminal to the light emitting element is short, so that the signal transmission line for transmitting the negative voltage signal to the light emitting element is short and the impedance is small, which is advantageous to ensure the uniformity of the brightness of the screen displayed on the array substrate.

[0052] As can be easily understood by those skilled in the art, the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24 simultaneously transmit negative voltage signals to the light emitting elements of all sub-pixels on the array substrate. However, since the second negative power supply access terminal 20 and the fourth negative power supply access terminal 24 are close to the light emitting elements in the central region, the negative voltage signals from the second negative power supply access terminal 20 and the fourth negative power supply access terminal 24 are transmitted to the light emitting elements in the central region through a short path with a small impedance.

[0053] Optionally, in an embodiment of the present application, the second negative power supply access terminal is located between the second positive power supply access terminal and the third positive power supply access terminal, and the array substrate further includes a fourth positive power supply access terminal and a fourth negative power supply access terminal located on a side of the positive power supply bus away from the display area, the fourth positive power supply access terminal being located between the second negative power supply access terminal and the third positive power supply access terminal and electrically connected to the positive power supply bus, the fourth negative power supply access terminal being located between the second negative power supply access terminal and the fourth positive power supply access terminal and electrically connected to the negative power supply auxiliary line, the fourth positive power supply access terminal being configured to transmit a positive voltage signal to the light-emitting element via the positive power supply bus, the positive power supply line, and the first electrode, and the fourth negative power supply access terminal being configured to transmit a negative voltage signal to the light-emitting element via the negative power supply auxiliary line, the auxiliary electrode, and the second electrode.

[0054] Exemplarily, as shown in FIG. 4, in addition to FIG. 1, the array substrate further includes a fourth positive power supply access terminal 23 and a fourth negative power supply access terminal 24 located on the side of the positive power supply bus 13 away from the display area B1, the fourth positive power supply access terminal 23 being located between the second negative power supply access terminal 20 and the third positive power supply access terminal 16 and electrically connected to the positive power supply bus 13, the fourth negative power supply access terminal 24 being located between the second negative power supply access terminal 20 and the fourth positive power supply access terminal 23 and electrically connected to the negative power supply auxiliary line 22, the fourth positive power supply access terminal 23 being configured to transmit a positive voltage signal to the light-emitting element via the positive power supply bus 13, the positive power supply line 12 and the first electrode, and the fourth negative power supply access terminal 24 being configured to transmit a negative voltage signal to the light-emitting element via the negative power supply auxiliary line 22, the auxiliary electrode 18 and the second electrode.

[0055] For example, as shown in FIG. 4, the fourth positive power supply access terminal 23 and the second positive power supply access terminal 15 may be symmetrical, and the fourth negative power supply access terminal 24 and the second negative power supply access terminal 20 may be symmetrical. The positive voltage signal at the fourth positive power supply access terminal 23 and the second positive power supply access terminal 15 can be transmitted to the light emitting element in the central region (the central region of the arrangement position shown in FIG. 4) via the positive power supply bus 13 and the positive power supply line 12, and the negative voltage signal at the fourth negative power supply access terminal 24 and the second negative power supply access terminal 20 can be transmitted to the light emitting element in the central region (the central region of the arrangement position shown in FIG. 4) via the negative power supply auxiliary line 22 and the auxiliary electrode 18. In this way, the passage path of the positive voltage signal transmitted from the positive power supply access terminal to the light emitting element is short, and the passage path of the negative voltage signal transmitted from the negative power supply access terminal to the light emitting element is short, so that the signal transmission line for transmitting the positive voltage signal to the light emitting element and the signal transmission line for transmitting the negative voltage signal to the light emitting element are both short, and the impedance is reduced, which is advantageous for ensuring the uniformity of the brightness of the screen displayed on the array substrate.

[0056] As can be easily understood by those skilled in the art, the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, and the fourth positive power supply access terminal 23 simultaneously transmit positive voltage signals to the light emitting elements of all sub-pixels on the array substrate, and the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24 simultaneously transmit negative voltage signals to the light emitting elements of all sub-pixels on the array substrate, however, since the second positive power supply access terminal 15 and the fourth positive power supply access terminal 23 are close to the light emitting elements in the central region, the positive voltage signals from the second positive power supply access terminal 15 and the fourth positive power supply access terminal 23 are transmitted to the light emitting elements in the central region via a short path and with a small impedance, and since the second negative power supply access terminal 20 and the fourth negative power supply access terminal 24 are close to the light emitting elements in the central region, the negative voltage signals from the second negative power supply access terminal 20 and the fourth negative power supply access terminal 24 are transmitted to the light emitting elements in the central region via a short path and with a small impedance.

[0057] Optionally, in an embodiment of the present application, the light emitting element is an organic light emitting diode, the first electrode is an anode, and the second electrode is a cathode.

[0058] Optionally, in an embodiment of the present application, at least one of the plurality of sub-pixels includes a thin film transistor and a connection electrode, and the thin film transistor includes an active layer located on the base substrate, a gate located on a side of the active layer away from the base substrate, and a source and a drain located on a side of the gate away from the base substrate.

[0059] Optionally, the positive power bus includes a positive power bus first sub-layer and a positive power bus second sub-layer that are electrically connected to each other; The positive power supply bus first sub-layer is located in the same layer as the source or the drain, and the positive power supply bus second sub-layer is located in the same layer as the connection electrode.

[0060] Optionally, the positive power bus first sub-layer and the positive power bus second sub-layer are electrically connected through a positive power bus via.

[0061] Optionally, the negative power line includes a negative power line first sub-layer and a negative power line second sub-layer that are electrically connected together; The negative power supply auxiliary line includes a negative power supply auxiliary line first sub-layer and a negative power supply auxiliary line second sub-layer that are electrically connected to each other; The negative power line first sub-layer and the negative power auxiliary line first sub-layer are both located in the same layer as the source or drain, and the negative power line second sub-layer and the negative power auxiliary line second sub-layer are both located in the same layer as the connection electrode.

[0062] Optionally, the negative power line first sub-layer and the negative power line second sub-layer are electrically connected through a negative power line via, and the negative power auxiliary line first sub-layer and the negative power auxiliary line second sub-layer are electrically connected through a negative power auxiliary line via.

[0063] 5, cross-sectional views of aa, bb, cc, and ee portions of the array substrate shown in any one of Figs. 1 to 4 are shown. As shown in Fig. 5, at least one of the sub-pixels 11 includes a thin-film transistor 110 and a connection electrode 111, and the thin-film transistor 110 includes an active layer 1101 located on the base substrate 10, a gate 1102 located on the side of the active layer 1101 away from the base substrate 10, and a source 1103 and a drain 1104 located on the side of the gate 1102 away from the base substrate 10, and the source 1103 and the drain 1104 may be located in the same layer.

[0064] The positive power supply bus 13 includes a positive power supply bus first sub-layer 131 and a positive power supply bus second sub-layer 132, which are electrically connected through a positive power supply bus via (not shown in FIG. 5). The positive power supply bus first sub-layer 131 is located in the same layer as the source 1103 or the drain 1104, and the positive power supply bus second sub-layer 132 is located in the same layer as the connection electrode 111. The number of vias of the positive power supply bus may be multiple, and the positive power supply bus first sub-layer 131 and the positive power supply bus second sub-layer 132 are electrically connected through multiple positive power supply bus vias to ensure the reliability of the connection.

[0065] The negative power supply line 17 includes a negative power supply line first sub-layer 171 and a negative power supply line second sub-layer 172, which are electrically connected through a negative power supply line via (not shown in FIG. 5). The auxiliary negative power supply line 22 includes a negative power supply line first sub-layer 221 and a negative power supply line second sub-layer 222, which are electrically connected through a negative power supply line auxiliary via. The negative power supply line first sub-layer 171 and the auxiliary negative power supply line first sub-layer 221 are both located in the same layer as the source 1103 or the drain 1104, and the negative power supply line second sub-layer 172 and the auxiliary negative power supply line second sub-layer 222 are both located in the same layer as the connection electrode 111. The number of negative power supply line vias and the number of negative power supply auxiliary line vias may both be multiple, and the negative power supply line first sub-layer 171 and the negative power supply line second sub-layer 172 are electrically connected via multiple negative power supply line vias to ensure connection reliability, and the negative power supply auxiliary line first sub-layer 221 and the negative power supply auxiliary line second sub-layer 222 are electrically connected via multiple negative power supply auxiliary line vias to ensure connection reliability.

[0066] Optionally, in an embodiment of the present application, the auxiliary electrode is located on a side of the negative power supply line remote from the base substrate and is electrically connected to the negative power supply auxiliary line through a negative power supply auxiliary via.

[0067] 5, the auxiliary electrode 18 is located on the side of the negative power supply line 17 away from the base substrate 10, and the auxiliary electrode 18 is electrically connected to the negative power supply auxiliary line 22 through a negative power supply auxiliary via, for example, the auxiliary electrode 18 is electrically connected to the negative power supply auxiliary line second sub-layer 222 through a negative power supply auxiliary via. The number of negative power supply auxiliary vias may be multiple, and the auxiliary electrode 18 and the negative power supply auxiliary line second sub-layer 222 are electrically connected through multiple negative power supply auxiliary vias to ensure the reliability of the connection.

[0068] Optionally, in embodiments of the present application, the auxiliary electrode is located on a side of the negative power line remote from the base substrate and is electrically connected to the negative power line through a negative power auxiliary via.

[0069] 5, the auxiliary electrode 18 is located on the side of the negative power supply line 17 away from the base substrate 10, and the auxiliary electrode 18 is electrically connected to the negative power supply line 17 through a negative power supply auxiliary via. For example, the auxiliary electrode 18 is electrically connected to the negative power supply line second sub-layer 172 through a negative power supply auxiliary via. The number of negative power supply auxiliary vias may be multiple, and the auxiliary electrode 18 and the negative power supply line second sub-layer 172 are electrically connected through multiple negative power supply auxiliary vias to ensure connection reliability.

[0070] As can be easily understood by a person skilled in the art, the negative power supply auxiliary via connecting the auxiliary electrode 18 and the negative power supply auxiliary line second sub-layer 222 is a via located in the insulating layer between the auxiliary electrode 18 and the negative power supply auxiliary line second sub-layer 222, the negative power supply auxiliary via connecting the auxiliary electrode 18 and the negative power supply line second sub-layer 172 is a via located in the insulating layer between the auxiliary electrode 18 and the negative power supply line second sub-layer 172, and the negative power supply auxiliary via connecting the auxiliary electrode 18 and the negative power supply auxiliary line second sub-layer 222 is different from the negative power supply auxiliary via connecting the auxiliary electrode 18 and the negative power supply line second sub-layer 172.

[0071] Optionally, in an embodiment of the present application, at least one of the plurality of sub-pixels includes a thin film transistor, the thin film transistor including an active layer located on the base substrate, a gate located on a side of the active layer away from the base substrate, and a source and a drain located on a side of the gate away from the base substrate, the first positive power supply access terminal, the second positive power supply access terminal, and the third positive power supply access terminal are all located in the same layer as the source or the drain, and the first negative power supply access terminal, the second negative power supply access terminal, and the third negative power supply access terminal are all located in the same layer as the source or the drain.

[0072] Illustratively, referring to Fig. 6, cross-sectional views of the aa and ff portions of the array substrate shown in Fig. 1 are shown. As shown in Fig. 6, at least one of the sub-pixels 11 includes a thin film transistor 110, which includes an active layer 1101 located on the base substrate 10, a gate 1102 located on the side of the active layer 1101 away from the base substrate 10, and a source 1103 and a drain 1104 located on the side of the gate 1102 away from the base substrate 10; a first positive power supply access terminal 14, a second positive power supply access terminal 15, and a third positive power supply access terminal 16 are all located in the same layer as the source 1103 or the drain 1104; and a first negative power supply access terminal 19, a second negative power supply access terminal 20, and a third negative power supply access terminal 21 are all located in the same layer as the source 1103 or the drain 1104.

[0073] Optionally, in the embodiment of the present application, the array substrate further includes a fourth positive power supply access terminal and / or a fourth negative power supply access terminal, the fourth positive power supply access terminal and / or the fourth negative power supply access terminal are located in the same layer as the source or the drain.

[0074] 2. For example, referring to Fig. 7, a cross-sectional view of aa portion and ff portion of the array substrate shown in Fig. 2 is shown. As shown in Fig. 7, the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, and the fourth positive power supply access terminal 23 are all located in the same layer as the source 1103 or the drain 1104, and the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21 are all located in the same layer as the source 1103 or the drain 1104.

[0075] 8, cross-sectional views of the aa and ff portions of the array substrate shown in FIG. 3 are shown. As shown in FIG. 8, the first positive power supply access terminal 14, the second positive power supply access terminal 15, and the third positive power supply access terminal 16 are all located in the same layer as the source 1103 or the drain 1104, and the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24 are all located in the same layer as the source 1103 or the drain 1104.

[0076] 4. For example, referring to Fig. 9, a cross-sectional view of aa portion and ff portion of the array substrate shown in Fig. 4 is shown. As shown in Fig. 9, the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, and the fourth positive power supply access terminal 23 are all located in the same layer as the source 1103 or the drain 1104, and the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24 are all located in the same layer as the source 1103 or the drain 1104.

[0077] Optionally, in the embodiment of the present application, the negative power auxiliary line includes a negative power auxiliary line first sub-layer and a negative power auxiliary line second sub-layer which are electrically connected, and the second negative power access terminal, the fourth negative power access terminal and the negative power auxiliary line first sub-layer are an integrated structure.

[0078] Illustratively, a cross-sectional view of the aa portion and the gg portion of the array substrate shown in FIG. 3 or FIG. 4 is shown with reference to FIG. 10. As shown in FIG. 10, the negative power auxiliary line 22 includes a negative power auxiliary line first sub-layer 221 and a negative power auxiliary line second sub-layer 222, which are electrically connected through a negative power auxiliary line via (not shown in FIG. 10), and the second negative power access terminal 20, the fourth negative power access terminal 24, and the negative power auxiliary line first sub-layer 221 are integrated into one structure.

[0079] 10 illustrates an example in which the array substrate includes both the second negative power supply access terminal 20 and the fourth negative power supply access terminal 24, but when the array substrate includes only one of the second negative power supply access terminal 20 or the fourth negative power supply access terminal 24, the second negative power supply access terminal 20 or the fourth negative power supply access terminal 24 and the negative power supply auxiliary line first sub-layer 221 are integrated. For example, when the array substrate includes the second negative power supply access terminal 20 but does not include the fourth negative power supply access terminal 24, the second negative power supply access terminal 20 and the negative power supply auxiliary line first sub-layer 221 are integrated, and when the array substrate includes the fourth negative power supply access terminal 24 but does not include the second negative power supply access terminal 20, the fourth negative power supply access terminal 24 and the negative power supply auxiliary line first sub-layer 221 are integrated.

[0080] Optionally, in an embodiment of the present application, the array substrate further includes a circuit substrate located on a side of the first positive power supply access terminal, the second positive power supply access terminal, the third positive power supply access terminal, the fourth positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal away from the display area, to which the first positive power supply access terminal, the second positive power supply access terminal, the third positive power supply access terminal, the fourth positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal are electrically connected, respectively.

[0081] For example, as shown in FIG. 1, the array substrate further includes a circuit board 25 located on the side away from the display area B1 of the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21, and to which the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21 are electrically connected, respectively.

[0082] For example, as shown in FIG. 2, the array substrate further includes a circuit board 25 that is located on the side away from the display area B1 of the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the fourth positive power supply access terminal 23, the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21, and to which the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the fourth positive power supply access terminal 23, the first negative power supply access terminal 19, the second negative power supply access terminal 20, and the third negative power supply access terminal 21 are electrically connected, respectively.

[0083] For example, as shown in FIG. 3, the array substrate further includes a circuit board 25 which is located on the side away from the display area B1 of the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24, and to which the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24 are electrically connected, respectively.

[0084] For example, as shown in FIG. 4, the array substrate further includes a circuit board 25 which is located on the side away from the display area B1 of the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the fourth positive power supply access terminal 23, the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24, and to which the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the fourth positive power supply access terminal 23, the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, and the fourth negative power supply access terminal 24 are electrically connected, respectively.

[0085] The circuit board 25 described in the embodiment of the present application may be a flexible printed circuit board (abbreviated as FPC).

[0086] 5 to 10, at least one of the sub-pixels 11 includes a thin film transistor 110, a connection electrode 111, a light-emitting element 112, and a storage capacitor 113. The thin film transistor 110 includes an active layer 1101 located on the base substrate 10, a first insulating layer 1105 located on the side of the active layer 1101 away from the base substrate 10, a gate 1102 located on the side of the first insulating layer 1105 away from the base substrate 10, a second insulating layer 1106 located on the side of the gate 1102 away from the base substrate 10, a third insulating layer 1107 located on the side of the second insulating layer 1106 away from the base substrate 10, and a source 1103 and a drain 1104 located on the side of the third insulating layer 1107 away from the base substrate 10. The connection electrode 111 is located on the side of the thin film transistor 110 away from the base substrate 10, and the connection electrode 111 is electrically connected to the drain 1104. The light emitting element 112 is located on the side of the connection electrode 111 away from the base substrate, and the light emitting element 112 includes a first electrode 1121, a light emitting layer 1122, and a second electrode 1123 which are stacked in this order in a direction away from the base substrate 10, and the first electrode 1121 is electrically connected to the connection electrode 111. The storage capacitance 113 includes a first electrode plate 1131 and a second electrode plate 1132, and the first electrode plate 1131 is located in the same layer as the gate 1101, and the second electrode plate 1132 is located between the second insulating layer 1106 and the third insulating layer 1107.

[0087] 5 to 10, at least one of the subpixels 11 further includes a buffer layer 114 located between the active layer 1101 and the base substrate 10, a passivation layer 115 and a first flat layer 116 located between the source 1103 and the connection electrode 111 in a direction away from the base substrate 10, and a second flat layer 117 located between the connection electrode 111 and the first electrode 1121. The passivation layer 115 and the first flat layer 116 have vias, and the connection electrode 111 is electrically connected to the drain 1104 through the vias of the passivation layer 115 and the first flat layer 116, and the second flat layer 117 has a via, and the first electrode 1121 is electrically connected to the connection electrode 111 through the via of the second flat layer 117.

[0088] Optionally, as shown in Figures 5 to 10, the array substrate further includes a pixel definition layer 26 and a package structure 27. The pixel definition layer 26 is located on a side of the second planar layer 117 away from the base substrate 10 and includes an opening region defined by a barrier wall structure, and the light emitting element 112 is located in the opening region of the pixel definition layer 26. The package structure 27 is located on a side of the light emitting element 112 away from the base substrate and is used to package the light emitting element 112.

[0089] In addition, in the bb, cc, ee, ff, and gg portions in Figures 5 to 10, the first insulating layer 1105, the second insulating layer 1106, the third insulating layer 1107, the buffer layer 114, the flat layer 115, the passivation layer 115, the first flat layer 116, and the second flat layer 117 may be portions that extend to the peripheral region B2 of the first insulating layer 1105, the second insulating layer 1106, the third insulating layer 1107, the buffer layer 114, the flat layer 115, the passivation layer 115, the first flat layer 116, and the second flat layer 117 in the aa portion. As can be easily understood by those skilled in the art, in the bb, cc, ee, ff, and gg portions of Figures 5 to 10, only the positive power supply bus 13, the first positive power supply access terminal 14, the second positive power supply access terminal 15, the third positive power supply access terminal 16, the negative power supply line 17, the auxiliary electrode 18, the first negative power supply access terminal 19, the second negative power supply access terminal 20, the third negative power supply access terminal 21, the negative power supply auxiliary line 22, the fourth positive power supply access terminal 23, and the fourth negative power supply access terminal 24 are shown, but the peripheral area of ​​the array substrate may include other circuit structures not shown in Figures 5 to 10.

[0090] In addition, the array substrate may include other structures in addition to the structures described in the present application. For example, the array substrate may further include a plurality of gate lines in the same extending direction, a plurality of data lines in the same extending direction, a plurality of gate lines, and a plurality of data lines cross each other to define a plurality of pixel regions, and a plurality of sub-pixels are located in the plurality of pixel regions in a one-to-one correspondence. In addition, for example, the array substrate may further include a chip on film (COF) and an integrated circuit (IC), and the embodiments of the present application are not described here.

[0091] As described above, the array substrate according to the embodiment of the present application includes a first positive power supply access terminal, a second positive power supply access terminal, a third positive power supply access terminal, a first negative power supply access terminal, a second negative power supply access terminal, and a third negative power supply access terminal, the second positive power supply access terminal and the second negative power supply access terminal are all located between the first positive power supply access terminal and the third positive power supply access terminal, each positive power supply access terminal can transmit a positive voltage signal to a light emitting element of a sub-pixel nearby thereto through a positive power supply bus and a positive power supply line, and each negative power supply access terminal can transmit a negative voltage signal to a light emitting element of a sub-pixel nearby thereto through a negative power supply line, a negative power supply auxiliary line, and an auxiliary electrode, so that the length of the signal transmission line for transmitting the positive voltage signal to the light emitting element and the signal transmission line for transmitting the negative voltage signal to the light emitting element are both short and have small impedance, which is advantageous to ensure uniformity of brightness of a screen displayed on the array substrate.

[0092] Based on the same inventive concept, an embodiment of the present application further provides a display device, which includes any one of the array substrates described above. The display device in the embodiment of the present application may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigation system, etc.

[0093] In the embodiment of the present application, the term "same layer" refers to the relationship between layers formed at the same time in the same step. For example, when the negative power auxiliary line second sub-layer 222 and the connection electrode 111 are formed by performing one or more steps of the same patterning process on the material of the same layer, they are located in the same layer, and in another example, the negative power auxiliary line second sub-layer 222 and the connection electrode 111 are formed in the same layer by performing the step of forming the negative power auxiliary line second sub-layer 222 and the step of forming the connection electrode 111 at the same time. "Same layer" does not necessarily mean that the thickness or height of the layer is the same in a cross-sectional view at any time.

[0094] In the embodiments of the present application, the terms "first," "second," "third," "fourth," and similar words do not denote any sequential order, quantity, or importance, but are used merely to distinguish different components. Two conductors are "electrically connected" if the two conductors are directly or indirectly electrically connected and can transmit an electrical signal. The term "at least one" refers to one or more, and "multiple" refers to two or more than two.

[0095] In the embodiments of the present application, the term "and / or" is merely used to describe the relationship between related items, and indicates that three relationships may exist. For example, A and / or B can indicate that only A exists, that both A and B exist, or that only B exists. In addition, the character " / " in this specification generally indicates an "or" relationship between the related items before and after it.

[0096] In the drawings, the size of some or all layers, or the size of some or all regions, may be exaggerated for clarity. And when an element or layer is described as being "on" another element or layer, it is understood that it may be directly on the other element, or that there may be intervening layers. And when an element or layer is described as being "under" another element or layer, it is understood that it may be directly under the other element, or that there may be one or more intervening layers or elements. Furthermore, when a layer or element is described as being "between" two layers or elements, it is understood that it may be the only layer between the two layers or elements, or that there may be one or more intermediate layers or elements. Throughout, like numbers refer to similar elements.

[0097] The above are merely illustrative examples of the present application, and do not limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the scope of the idea and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An array substrate, a base substrate including a display area including a first boundary, a second boundary, a third boundary, and a fourth boundary, and a peripheral area surrounding the display area; A plurality of sub-pixels in the display region, the sub-pixels including a light-emitting element including a first electrode, a light-emitting layer, and a second electrode, on which at least one of the plurality of sub-pixels is stacked; a plurality of positive power lines in the display region, the positive power lines being electrically connected to the plurality of sub-pixels; a positive power bus in the peripheral region, extending along the first boundary, and electrically connected to the plurality of positive power lines; a first positive power supply access terminal and a second positive power supply access terminal, which are located on a side of the positive power supply bus in the peripheral area away from the display area and are electrically connected to the positive power supply bus, respectively; a negative power line in the peripheral region and surrounding the second boundary, the third boundary, and the fourth boundary; an auxiliary electrode in the peripheral region, surrounding the first boundary, the second boundary, the third boundary, and the fourth boundary, and electrically connected to the negative power supply line and the second electrode, respectively; a first negative power supply access terminal, a second negative power supply access terminal, a third negative power supply access terminal and a fourth negative power supply access terminal on a side of the positive power supply bus in the peripheral area away from the display area, the first negative power supply access terminal being on a side of the first positive power supply access terminal away from the second positive power supply access terminal, the second negative power supply access terminal being between the first positive power supply access terminal and the third positive power supply access terminal, the third negative power supply access terminal being on a side of the second positive power supply access terminal away from the first positive power supply access terminal, and the fourth negative power supply access terminal being between the second negative power supply access terminal and the third negative power supply access terminal, the first negative power supply access terminal and the third negative power supply access terminal being electrically connected to the negative power supply line, respectively; a negative power auxiliary line in the peripheral region between the second negative power access terminal and the fourth negative power access terminal along a first direction and between the positive power bus and the second negative power access terminal along a second direction intersecting the first direction, one terminal of the negative power auxiliary line being connected to the second negative power access terminal and the other terminal of the negative power auxiliary line being connected to the fourth negative power access terminal; The negative power supply auxiliary line is electrically connected to the auxiliary electrode, and an orthogonal projection of the negative power supply auxiliary line on the base substrate overlaps with an orthogonal projection of the auxiliary electrode on the base substrate.

2. 2. The array substrate of claim 1, wherein the negative power supply auxiliary line includes a first portion arranged along a second direction and a second portion connected to the first portion, and a length of the first portion in the first direction is shorter than a length of the second portion in the first direction.

3. 2. The array substrate of claim 1, wherein the negative power supply auxiliary line includes a first portion arranged along a second direction and a second portion connected to the first portion, and a length of the first portion in the second direction is shorter than a length of the second portion in the second direction.

4. The first positive power supply access terminal and the second positive power supply access terminal are configured to transmit a positive voltage signal to a first electrode of the light-emitting element via the positive power supply bus and the positive power supply line; The first negative power supply access terminal and the third negative power supply access terminal are configured to transmit a negative voltage signal to the second electrode of the light emitting element via the negative power supply line and the auxiliary electrode; 2. The array substrate according to claim 1, wherein the second negative power supply access terminal and the fourth negative power supply access terminal are configured to transmit a negative voltage signal to the second electrode of the light emitting element through the auxiliary negative power supply line and the auxiliary electrode.

5. The first positive power supply access terminal and the third positive power supply access terminal are provided symmetrically with respect to the auxiliary negative power supply line; and / or The first negative power supply access terminal and the third negative power supply access terminal are provided symmetrically with respect to the auxiliary negative power supply line; and / or The second negative power supply access terminal and the fourth negative power supply access terminal are provided symmetrically with respect to the auxiliary negative power supply line. The array substrate according to claim 1 .

6. At least one of the first positive power supply access terminal, the second positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal has a polygonal line shape when orthogonally projected on the base substrate. The array substrate according to claim 1 .

7. The array substrate of claim 1, wherein the negative power supply auxiliary line, the second negative power supply access terminal, and the fourth negative power supply access terminal are of an integrated structure.

8. The auxiliary electrode has a shape of a closed ring, and the auxiliary electrode surrounds the display area. The array substrate according to claim 1 .

9. At least one of the plurality of sub-pixels includes a thin film transistor and a connecting electrode, 2. The array substrate of claim 1, wherein the thin film transistor includes an active layer on the base substrate, a gate on a side of the active layer away from the base substrate, and a source and a drain on a side of the gate away from the base substrate.

10. the positive power bus includes a positive power bus first sub-layer and a positive power bus second sub-layer that are electrically connected to each other; 10. The array substrate according to claim 9, wherein the positive power bus first sub-layer is located in the same layer as one of the source and the drain, and the positive power bus second sub-layer is located in the same layer as the connection electrode.

11. 11. The array substrate of claim 10, wherein the positive power bus first sub-layer and the positive power bus second sub-layer are electrically connected through a positive power bus via.

12. the negative power line includes a negative power line first sub-layer and a negative power line second sub-layer that are electrically connected; the negative power supply auxiliary line includes a negative power supply auxiliary line first sub-layer and a negative power supply auxiliary line second sub-layer that are electrically connected to each other; 10. The array substrate of claim 9, wherein the negative power line first sub-layer and the negative power auxiliary line first sub-layer are both in the same layer as one of the source and the drain, and the negative power line second sub-layer and the negative power auxiliary line second sub-layer are both in the same layer as the connection electrode.

13. 13. The array substrate of claim 12, wherein the negative power line first sub-layer and the negative power line second sub-layer are electrically connected through a negative power line via, and the negative power auxiliary line first sub-layer and the negative power auxiliary line second sub-layer are electrically connected through a negative power auxiliary line via.

14. At least one of the plurality of sub-pixels includes a thin film transistor; the thin film transistor includes an active layer on the base substrate, a gate on a side of the active layer remote from the base substrate, and a source and a drain on sides of the gate remote from the base substrate; 2. The array substrate according to claim 1, wherein the first positive power supply access terminal and the second positive power supply access terminal are both in the same layer as one of the source and the drain.

15. At least one of the plurality of sub-pixels includes a thin film transistor; the thin film transistor includes an active layer on the base substrate, a gate on a side of the active layer remote from the base substrate, and a source and a drain on sides of the gate remote from the base substrate; 2. The array substrate according to claim 1, wherein the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal are all in the same layer as one of the source and the drain.

16. the negative power supply auxiliary line includes a negative power supply auxiliary line first sub-layer and a negative power supply auxiliary line second sub-layer that are electrically connected to each other; 2. The array substrate as claimed in claim 1, wherein the second negative power supply access terminal, the fourth negative power supply access terminal and the negative power supply auxiliary line first sub-layer are an integral structure.

17. 2. The array substrate of claim 1, further comprising: a circuit board located on a side of the peripheral area away from the display area of ​​the first positive power supply access terminal, the second positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal, to which the first positive power supply access terminal, the second positive power supply access terminal, the first negative power supply access terminal, the second negative power supply access terminal, the third negative power supply access terminal, and the fourth negative power supply access terminal are electrically connected, respectively.

18. 2. The array substrate according to claim 1, wherein the auxiliary electrode is on a side of the negative power supply line remote from the base substrate and is electrically connected to the negative power supply auxiliary line through a negative power supply auxiliary via.

19. A display device comprising the array substrate according to claim 1 .

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