Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises an array substrate and a pixel array; the pixel array comprises a plurality of sub-pixels, one sub-pixel comprises at least one light-emitting diode, the light-emitting diode comprises a first electrode and a second electrode; the array substrate comprises a first power supply structure, a second power supply structure and a plurality of pixel circuits, the first power supply structure is used for providing a first power supply voltage, the second power supply structure is used for providing a second power supply voltage, the first power supply structure is electrically connected to the first electrode of the light-emitting diode through the pixel circuit, and the second power supply structure is electrically connected to the second electrode of the light-emitting diode; at least one of the first power supply structure and the second power supply structure comprises at least one common electrode; the common electrode comprises a fourth opening, and no metal structure is arranged in the fourth opening. The application can improve the preparation reliability of the common electrode.

Description

[0001] This application is based on application number 202011400056.8, filed on December 2, 2020.

[0002] This is a divisional application of the patent application entitled "Display Panel and Display Device". Technical Field

[0003] This invention relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0004] In current display panels that use LEDs as light-emitting pixels, positive and negative power lines are required to power the LEDs. However, during display, there is a significant voltage drop on the power lines, which not only leads to excessive power consumption of the display panel but also causes uneven display. Summary of the Invention

[0005] This invention provides a display panel and a display device that reduce the power consumption of the display panel and improve the display unevenness problem caused by voltage drop on the power line.

[0006] In a first aspect, embodiments of the present invention provide a display panel, comprising: an array substrate and a pixel array;

[0007] The pixel array includes a plurality of sub-pixels, and each sub-pixel includes at least one light-emitting diode, the light-emitting diode including a first electrode and a second electrode;

[0008] The array substrate includes a first power supply structure, a second power supply structure, and a plurality of pixel circuits. The first power supply structure is used to provide a first power supply voltage, and the second power supply structure is used to provide a second power supply voltage. The first power supply structure is electrically connected to the first electrode of the light-emitting diode through the pixel circuits, and the second power supply structure is electrically connected to the second electrode of the light-emitting diode.

[0009] At least one of the first power supply structure and the second power supply structure includes at least one common electrode;

[0010] The common electrode includes a fourth opening, and no metal structure is disposed within the fourth opening.

[0011] Secondly, embodiments of the present invention provide a display device, including a display panel provided in any embodiment of the present invention.

[0012] The display panel and display device provided in the embodiments of the present invention have the following beneficial effects: setting at least one power supply structure including a common electrode, and setting the common electrode to have a fourth opening, helps to avoid the problems caused when the common electrode is set as an electrode with a certain area, and helps to improve the reliability of the fabrication of the common electrode. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A top view schematic diagram of a display panel provided in an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of a pixel circuit of a display panel provided in an embodiment of the present invention;

[0016] Figure 3 A cross-sectional schematic diagram of a display panel provided in an embodiment of the present invention;

[0017] Figure 4 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0018] Figure 5 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0019] Figure 6 for Figure 3 A partial top view of the display panel provided in the embodiment;

[0020] Figure 7 for Figure 3 Another partial top view of the display panel provided in the embodiment;

[0021] Figure 8 for Figure 3 Another partial top view of the display panel provided in the embodiment;

[0022] Figure 9 for Figure 3 Another partial top view of the display panel provided in the embodiment;

[0023] Figure 10 A top view schematic diagram of another display panel provided in an embodiment of the present invention;

[0024] Figure 11A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0025] Figure 12 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0026] Figure 13 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0027] Figure 14 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0028] Figure 15 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0029] Figure 16 This is another schematic cross-sectional view of a display panel provided in an embodiment of the present invention;

[0030] Figure 17 This is another schematic cross-sectional view of a display panel provided in an embodiment of the present invention;

[0031] Figure 18A for Figure 17 A partial top view of the display panel provided in the embodiment;

[0032] Figure 18B for Figure 17 Another partial top view of the display panel provided in the embodiment;

[0033] Figure 19 This is another schematic cross-sectional view of a display panel provided in an embodiment of the present invention;

[0034] Figure 20 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0035] Figure 21 A top view schematic diagram of another display panel provided in an embodiment of the present invention;

[0036] Figure 22 A top view schematic diagram of another display panel provided in an embodiment of the present invention;

[0037] Figure 23 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention;

[0038] Figure 24 This is a top view schematic diagram of a first power supply structure in another display panel provided in an embodiment of the present invention;

[0039] Figure 25 This is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] 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.

[0042] This invention provides a display panel and a display device. By modifying the power supply structure for driving light-emitting diodes (LEDs), at least one power supply structure is provided that includes a common electrode, and the common electrode has a certain area. This reduces the voltage drop of the signal transmitted on the power supply structure when driving the LEDs to emit light, reduces power consumption loss on the power supply structure, and improves the problem of uneven display.

[0043] Figure 1 This is a top view of the display panel provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of a pixel circuit of a display panel provided in an embodiment of the present invention.

[0044] like Figure 1 As shown, the display panel includes a display area AA, which includes a pixel array, and the pixel array includes multiple sub-pixels sp. Each sub-pixel sp includes at least one light-emitting diode (LED), and the LED includes a first electrode and a second electrode.

[0045] The display panel provided in this embodiment of the invention further includes an array substrate, which includes a first power supply structure, a second power supply structure, and multiple pixel circuits. The first power supply structure provides a first power supply voltage, and the second power supply structure provides a second power supply voltage. The first power supply structure is electrically connected to the first electrode of a light-emitting diode (LED) through the pixel circuits, and the second power supply structure is electrically connected to the second electrode of the LED. The first power supply structure, the second power supply structure, and the pixel circuits cooperate with each other to drive the LEDs to emit light. Figure 2 This illustration only shows one possible pixel circuit structure and is not intended to limit the invention. Figure 2The pixel circuit of the 7T1C is illustrated. The pixel circuit includes one driving transistor Tm, six switching transistors (T1 to T6), and one pixel capacitor C. The positive power supply voltage terminal PVDD, the negative power supply voltage terminal PVEE, the data voltage terminal Vdata, the first scan voltage terminal S1, the second scan voltage terminal S2, the reset power supply terminal Vref, and the light emission control terminal Emit are also illustrated. One electrode of the light-emitting diode E is connected to the positive power supply voltage terminal PVDD through the pixel circuit, and the other electrode of the light-emitting diode E is connected to the negative power supply voltage terminal PVEE. The positive power supply voltage terminal PVDD provides the positive power supply voltage signal, and the negative power supply voltage terminal PVEE provides the negative power supply voltage signal.

[0046] In this embodiment of the invention, one of the first power supply structure and the other of the second power supply structure provide a positive power supply voltage terminal, and the other provides a negative power supply voltage terminal. That is, one of the first power supply structure and the other of the second power supply structure provide a positive power supply voltage signal, and the other provides a negative power supply voltage signal. This invention designs at least one of the first power supply structure and the second power supply structure to include at least one common electrode. The display panel also includes a display area with an area of ​​S0, and the area of ​​the projection of the portion of the common electrode located in the display area onto the plane of the display panel is S1, where S1 ≥ 0.5S0. The common electrode reduces the resistance on the power supply structure, thereby reducing the voltage drop of the transmitted signal on the power supply structure, reducing power consumption loss on the power supply structure, and improving the display unevenness problem.

[0047] The common electrode can be strip-shaped or block-shaped, and openings can be provided on the common electrode. In some embodiments, the common electrode also includes at least two overlapping sub-common electrodes. When calculating the area S1, the total area of ​​the portion of the common electrode located in the display area projected onto the plane of the display panel is calculated, wherein the area of ​​the opening portion needs to be removed during the calculation. For a common electrode that includes overlapping sub-common electrodes, the area of ​​the overlapping portion of the overlapping sub-common electrodes in the direction perpendicular to the plane of the display panel is not calculated repeatedly.

[0048] In one embodiment, S1 = 0.6S0. Further, S1 = 0.7S0. Preferably, S1 = 0.9S0. The larger S1 is, the smaller the overall resistance of the common electrode, which is more conducive to reducing power loss in the power supply structure and also more conducive to improving the problem of uneven display.

[0049] In some embodiments, a first power supply structure provides a first power supply voltage, a second power supply structure provides a second power supply voltage, and the first power supply voltage is higher than the second power supply voltage. Optionally, the voltage range of the first power supply voltage is 0 to 8V (inclusive), and the voltage range of the second power supply voltage is 0 to -8V (inclusive).

[0050] In some embodiments, only one power supply structure includes a common electrode. In some embodiments, both the first and second power supply structures include a common electrode. The common electrode can be a full-surface structure, a strip, or a block. In the display panel, the first and second electrodes of the light-emitting diode (LED) can both face the pixel circuit; or both can be positioned away from the pixel circuit; or one can face the pixel circuit and the other away. The relative positions of the first and second electrodes of the LED with respect to the pixel circuit also differ. The present invention will be described in detail below with specific embodiments.

[0051] In one embodiment, both the first and second electrodes of the light-emitting diode are disposed toward the pixel circuit. Figure 3 This is a cross-sectional schematic diagram of a display panel provided in an embodiment of the present invention. Figure 3 The figure shows an array substrate 100 and a pixel array 200. The light-emitting diode E further includes a first semiconductor layer 51, a quantum well layer 52, and a second semiconductor layer 53 stacked together. The quantum well layer 52 is located between the first semiconductor layer 51 and the second semiconductor layer 53. A first electrode 11 is connected to the first semiconductor layer 51, and a second electrode 12 is connected to the second semiconductor layer 53. The first semiconductor layer 51 is located on the side of the second semiconductor layer 53 closest to the pixel circuit 30. The figure also illustrates a first power supply structure 21 and a second power supply structure 22. The first power supply structure 21 is electrically connected to the first electrode 11 of the light-emitting diode E through the pixel circuit 30, and the second power supply structure 22 is electrically connected to the second electrode 12 of the light-emitting diode E.

[0052] In another embodiment, the first electrode and the second electrode of the light-emitting diode face the pixel circuit one and face away from the pixel circuit the other. Figure 4 This is a cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention. (See diagram below.) Figure 4 As shown, the first semiconductor layer 51 is located on the side of the second semiconductor layer 53 closer to the pixel circuit 30, the first electrode 11 is located on the side of the first semiconductor layer 51 closer to the pixel circuit 30, and the second electrode 12 is located on the side of the second semiconductor layer 53 away from the pixel circuit 30. Figure 4The diagram also illustrates a first power supply structure 21 and a second power supply structure 22. The first power supply structure 21 is electrically connected to the first electrode 11 of the light-emitting diode E through the pixel circuit 30, and the second power supply structure 22 is electrically connected to the second electrode 12 of the light-emitting diode E. The diagram also shows the second electrode being electrically connected to the second power supply structure 22 through a conductive connection structure 73.

[0053] In another embodiment, both the first and second electrodes of the light-emitting diode are disposed away from the pixel circuit. Figure 5 This is a cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention. (See diagram below.) Figure 5 As shown, the first semiconductor layer 51 is located on the side of the second semiconductor layer 53 away from the pixel circuit 30, the first electrode 11 is located on the side of the first semiconductor layer 51 away from the pixel circuit 30, and the second electrode 12 is located on the side of the second semiconductor layer 53 away from the pixel circuit 30. The first power supply structure 21 is electrically connected to the first electrode 11 of the light-emitting diode E through the pixel circuit 30, and the second power supply structure 22 is electrically connected to the second electrode 12 of the light-emitting diode E.

[0054] In one embodiment, the common electrode is disposed across the entire surface of the display area. Specifically, as shown below... Figure 5 As shown, the second power supply structure 22 includes a common electrode COM, which is disposed across the entire surface of the display area. That is, the common electrode COM is electrically connected to the second electrodes 12 of all the light-emitting diodes E in the display area. Only one transistor of the pixel circuit 30 is shown in the figure. The transistor includes a first electrode d, a second electrode s, a control electrode g, and an active layer w. Optionally, the second electrode s is the source, the first electrode d is the drain, and the control electrode g is the gate. The figure shows that the first power supply structure 21 is located on the same layer as the second electrode s and the first electrode d of the transistor. In this embodiment, including a common electrode that is disposed across the entire surface of the second power supply structure reduces the resistance of the second power supply structure, thereby reducing the voltage drop of the transmitted signal on the second power supply structure, reducing power consumption loss on the second power supply structure, and improving the display unevenness problem.

[0055] For details, please refer to [link / reference]. Figure 5 As shown, the array substrate also includes a substrate 101, which is located on the side of the pixel circuit 30 away from the light-emitting diode E. The common electrode COM is located between the substrate 101 and the pixel circuit 30. The pixel circuit is electrically connected to the first electrode 11 via a first conductive connection structure 71. The second electrode 12 is electrically connected to the common electrode COM via a second conductive connection structure 72. This embodiment enables the common electrode in the second power supply structure to be arranged across its entire surface.

[0056] In one embodiment, the common electrode is a strip electrode, and the pixel array in the display panel includes multiple sub-pixel rows extending in a first direction and multiple sub-pixel columns extending in a second direction, the first and second directions intersecting; typically, the first and second directions are perpendicular to each other. The common electrode includes multiple strip electrodes that extend along the first direction and are arranged along the second direction within the display area.

[0057] In another embodiment, the common electrode is a strip electrode, and within the display area, multiple strip electrodes extend along a second direction and are arranged along a first direction.

[0058] Optionally, a strip electrode may correspond to a sub-pixel row or a strip electrode may correspond to a sub-pixel column.

[0059] In another embodiment, one strip electrode corresponds to two or three sub-pixel rows, or one strip electrode corresponds to two or three sub-pixel columns. Furthermore, when the strip electrode is located between the pixel circuit and the pixel array, the strip electrode has an opening, within which an auxiliary electrode is disposed. The auxiliary electrode is used to achieve electrical connection between the power supply structure and the electrodes of the light-emitting diode, and also to achieve electrical connection between the electrodes of the light-emitting diode and the pixel circuit.

[0060] In another embodiment, the common electrode is a block electrode, with one block electrode corresponding to multiple sub-pixel rows or columns. When the block electrode is located between the pixel circuit and the pixel array, the block electrode has an opening, within which an auxiliary electrode is disposed. The auxiliary electrode is used to achieve electrical connection between the power supply structure and the electrodes of the light-emitting diode, and also to achieve electrical connection between the electrodes of the light-emitting diode and the pixel circuit.

[0061] In another embodiment, the common electrode corresponds to all sub-pixels within the display area, and the common electrode has multiple openings. Similarly, auxiliary electrodes are disposed within the openings. These auxiliary electrodes are used to achieve electrical connection between the power supply structure and the electrodes of the light-emitting diode, and also to achieve electrical connection between the electrodes of the light-emitting diode and the pixel circuit.

[0062] In this embodiment of the invention, the common electrode in either the first or second power supply structure can be designed as a strip electrode or a block electrode, thereby ensuring that the common electrode has a large area and reducing the resistance of the power supply structure. The specific application of the common electrode structure will be described in conjunction with the following specific embodiments.

[0063] For details, please refer to [link / reference]. Figure 3As shown, the first power supply structure 21 includes at least one common electrode, which is a first common electrode 1COM located on the side of the pixel circuit 30 near the pixel array 200. The array substrate 100 also includes a first auxiliary electrode 41, which is on the same layer as the first common electrode 1COM and insulated from it. The pixel circuit 30 includes at least one transistor T, which includes a first electrode d, a second electrode s, a control electrode g, and an active layer w. The first electrode d of the transistor T is electrically connected to the first electrode 11 of the light-emitting diode E via the first auxiliary electrode 41. Specifically, the array substrate includes a gate metal layer, a source / drain metal layer, and a semiconductor layer, wherein the control electrode g is located in the gate metal layer, the first electrode d and the second electrode s are located in the source / drain metal layer, and the active layer w is located in the semiconductor layer. The transistor in the figure is only shown in the top-gate configuration.

[0064] Continue to refer to Figure 3 As shown, the array substrate 100 further includes a second auxiliary electrode 42, which is on the same layer as the first common electrode 1COM and insulated from it. The second power supply structure 22 is electrically connected to the second electrode 12 of the light-emitting diode E via the second auxiliary electrode 42. The second power supply structure 22 is located on the same layer as the first electrode d and the second electrode s of the transistor T. Optionally, the second power supply structure 22 includes multiple second power lines, with each second power line connecting to the second electrodes of multiple light-emitting diodes. Figure 3 The location of the membrane layer where the second power supply structure 22 is located is only schematically shown and is not intended to limit the invention.

[0065] Figure 3 In this embodiment, the first power supply structure 21 is located between the pixel circuit 30 and the light-emitting diode E. The first power supply structure 21 includes a first common electrode, wherein the total area of ​​the portion of the first common electrode located in the display area projected onto the plane of the display panel is S1, where S1 ≥ 0.5S0. In this embodiment, the first power supply structure includes a common electrode, which can reduce the resistance of the first power supply structure, thereby reducing the voltage drop of the transmitted signal on the first power supply structure, reducing power consumption loss on the first power supply structure, and improving the display unevenness problem.

[0066] Further reference Figure 3Schematic, the second power supply structure 22 is located on the side of the first common electrode 1COM away from the light-emitting diode E. The second power supply structure 22 includes multiple second power lines, which are on the same layer as the first electrode d of the transistor T. In the display panel, the data lines and the first electrode are on the same layer. Specifically, the extension direction of the second power lines is the same as the extension direction of the data lines in the display panel to ensure mutual insulation between the second power lines and the data lines. In this embodiment, the first power supply structure includes a common electrode to reduce power loss and improve display uniformity. The second power supply structure uses a second power line design, with the second power lines on the same layer as the first electrode in the transistor. The second power lines and the first electrode in the transistor are fabricated in the same process, and the fabrication of the second power supply structure does not increase the film thickness of the display panel.

[0067] In one embodiment, Figure 3 In this embodiment, the first common electrode is a strip electrode. Figure 6 for Figure 3 A partial top view of the display panel provided in the embodiment. Figure 6 Only the structure of the sub-pixels and the film layer containing the first power supply structure is shown. For example... Figure 6 As shown, the pixel array includes multiple sub-pixel rows spH extending in a first direction x and multiple sub-pixel columns spL extending in a second direction y, the first direction x and the second direction y intersecting; typically, the first direction x and the second direction y are perpendicular to each other. Each sub-pixel row spH includes multiple sub-pixels sp, and the common electrode COM includes multiple strip electrodes COM-1. Within the display area, the multiple strip electrodes COM-1 extend along the second direction y and are arranged along the first direction x.

[0068] In another embodiment, within the display area, multiple strip electrodes COM-1 extend along a first direction x and are arranged along a second direction y, which will not be described in detail here.

[0069] Figure 6 In one embodiment, one strip electrode is illustrated to correspond to one sub-pixel column. In another embodiment, one strip electrode corresponds to two or more sub-pixel columns. Figure 7 for Figure 3 Another partial top view of the display panel provided in the embodiment. Figure 7 Only the structure of the sub-pixels and the film layer containing the first power supply structure is shown. For example... Figure 7As shown, within the display area, strip electrodes COM-1 extend along the second direction y and are arranged along the first direction x. Each strip electrode COM-1 corresponds to two sub-pixel columns spL. Each strip electrode COM-1 has a first opening K1 that extends through the strip electrode COM-1 in its thickness direction. The first auxiliary electrode 41 and the second auxiliary electrode 42 are both located within the first opening K1. This embodiment can further increase the area of ​​the first common electrode, thereby further reducing the resistance of the first power supply structure, further reducing the voltage drop of the transmitted signal on the first power supply structure, reducing power consumption loss on the first power supply structure, and simultaneously improving the display unevenness problem.

[0070] In another embodiment, Figure 3 In this embodiment, the first common electrode is a block electrode. Figure 8 for Figure 3 Another partial top view of the display panel provided in the embodiment. Figure 8 Only the structure of the sub-pixels and the film layer containing the first power supply structure is shown. For example... Figure 8 As shown, the first common electrode is a block electrode COM-2, which corresponds to multiple sub-pixel rows spH and multiple sub-pixel columns spL. The block electrode COM-2 has a first opening K1 that extends through the block electrode COM-2 in its thickness direction. The first auxiliary electrode 41 and the second auxiliary electrode 42 are both located within the first opening K1. This embodiment can further increase the area of ​​the first common electrode, thereby significantly reducing the resistance of the first power supply structure, and consequently significantly reducing the voltage drop of the transmitted signal on the first power supply structure, reducing power consumption loss on the first power supply structure, and simultaneously improving the display unevenness problem.

[0071] Figure 8 In this embodiment, one first opening corresponds to one sub-pixel. In this embodiment, one first opening corresponds to n sub-pixels, where n is greater than or equal to 2; n first auxiliary electrodes are disposed within one first opening. Specifically, Figure 9 for Figure 3 Another partial top view of the display panel provided in the embodiment. (See attached diagram.) Figure 9 As shown, the first common electrode is a block electrode COM-2, which corresponds to multiple sub-pixel rows spH and multiple sub-pixel columns spL. The block electrode COM-2 has a first opening K1, which corresponds to three sub-pixels sp, and three first auxiliary electrodes 41 are disposed within one first opening K1.

[0072] When one first opening K1 corresponds to one sub-pixel sp, a first auxiliary electrode 41 is set within the first opening K1, in the first direction x, that is... Figure 8In the left-right direction, there are two gaps between the edge of the first auxiliary electrode 41 and the edge of the first opening K1. Therefore, for three consecutively arranged first auxiliary electrodes 41, there are a total of six gaps. When one first opening K1 corresponds to three sub-pixels sp, in Figure 9 In the left-right direction, there is a gap between the edge of the first auxiliary electrode 41 and the edge of the first opening K1, and a gap between two adjacent first auxiliary electrodes 41. For three consecutively arranged first auxiliary electrodes 41, there are four gaps. If the width of the gap in the first direction x is fixed, then... Figure 9 The implementation method can help reduce the space occupied by the opening, thereby increasing the area of ​​the first common electrode. That is, in an implementation where the first opening corresponds to two or more sub-pixels, the auxiliary electrodes within the first opening can be insulated from each other and relatively concentrated, thereby reducing the space occupied by the first opening.

[0073] The above Figures 6 to 9 The embodiment illustrates the shape of the common electrode and the correspondence between the common electrode and the sub-pixels, using the common electrode in the first power supply structure as an example. The above description can also be applied in the embodiment below where the second power supply structure includes a common electrode. Figures 6 to 9 The diagram illustrates the arrangement of the common electrode.

[0074] Further, please refer to the above. Figure 8 As shown, the edge of the first opening K1 is at a distance from the auxiliary electrode ( Figure 8 The distance from the edge of the first auxiliary electrode 41 is shown as D1, where 0.1μm≤D1≤5μm. The distance D1 in the first direction is also shown in the figure. Figure 8 In this embodiment, a first auxiliary electrode and a second auxiliary electrode are disposed within the first opening. In the following detailed embodiments, an embodiment in which only the first auxiliary electrode is disposed within the first opening is also included. By setting the distance between the edge of the first opening and the edge of the auxiliary electrode to a certain range, it is possible to ensure mutual insulation between the common electrode and the auxiliary electrode, while avoiding making the first opening too large and affecting the area of ​​the common electrode.

[0075] In related display panels, the power lines and data lines in the power supply structure are located on the same film layer, and the power lines and data lines extend in the same direction. The power lines and scan lines intersect to define the area where the sub-pixels are located, resulting in a narrower linewidth for the power lines. However, in this application, if... Figure 3 and Figure 4The schematic diagram of the first power supply structure shows that the first power supply structure 21 is located on a different film layer than the first electrode d and the second electrode s of the transistor. That is, the first power supply structure 21 is located on a different film layer than the source and drain electrodes. Therefore, the first power supply structure does not need to consider avoiding data lines or source / drain electrodes during fabrication. The first power supply structure may include a strip electrode with a large width or a block electrode to increase the area of ​​the common electrode in the first power supply structure. In some embodiments, the first common electrode in the first power supply structure has multiple first openings, within which auxiliary electrodes for connecting the pixel circuit and the light-emitting diode electrode are set. In this embodiment of the invention, the area of ​​the first opening is significantly smaller than the sub-pixel area defined by the intersection of power lines and scan lines in related technologies.

[0076] In one embodiment, Figure 10 This is a top view schematic diagram of another display panel provided in an embodiment of the present invention. Figure 10 The structure of the first common electrode is only shown in the diagram, such as Figure 10 As shown, the first common electrode 1COM has at least two first openings K1, which are arranged along a third direction z. The length of the portion of the first common electrode 1COM located between two adjacent first openings K1 in the third direction z is d1, and the length of the first opening K1 in the third direction z is d2. R = d1:d2, R ≥ 3 / 7. Figure 10 The diagram illustrates a first opening K1 corresponding to a sub-pixel (not shown). The width of a sub-pixel in the third direction z is D. Therefore, the length d2 of the first opening K1 in the third direction z is ≤ 70%D. The third direction z is the same as the extension direction of the sub-pixel row, or the third direction z is the same as the extension direction of the sub-pixel column. In this embodiment, the ratio of the length of the portion of the first common electrode located between two adjacent first openings in the third direction to the length of the first opening in the third direction is significantly greater than the ratio of the linewidth of the power line to the width of the sub-pixel region between adjacent power lines in related technologies. This ensures that the projected area of ​​the first power structure in the display area on the plane of the display panel is not less than 50% of the display area. Compared with related technologies, this significantly reduces the resistance of the first power structure, thereby reducing power consumption and improving display uniformity.

[0077] Figure 10 The illustration only uses one first opening corresponding to one sub-pixel. However, in the implementation where one first opening corresponds to two or three sub-pixels, the ratio of the length of the portion of the first common electrode located between two adjacent first openings in the third direction to the length of the first opening in the third direction is still greater than 3 / 7.

[0078] In another embodiment, Figure 11This is a cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention. (See diagram below.) Figure 11 As shown, the first power supply structure 21 also includes a first power line 211, which is electrically connected to the first common electrode 1COM; the first power line 211 is on the same layer as the first electrode s of the transistor T. By connecting the first power line in parallel with the first common electrode, the resistance of the first power supply structure can be further reduced, thereby further reducing the voltage drop across the first power supply structure. Specifically, in a direction perpendicular to the plane of the display panel, the first common electrode 1COM and the first power line 211 connected to it overlap, and the first power line 211 extends in the same direction as the data lines in the display panel. Figure 11 The diagram only illustrates that the second power supply structure 22 and the control electrode g of the transistor T are located on the same layer, and is not intended to limit the invention.

[0079] In another embodiment, the first common electrode includes at least two stacked first sub-common electrodes. Figure 12 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 12 As shown, the first common electrode 1COM includes two stacked first sub-com electrodes 1-com that are electrically connected to each other, and an insulating layer 103 is included between adjacent first sub-com electrodes 1-com. In this embodiment, the resistance of the first power supply structure can be further reduced, thereby further reducing the voltage drop on the first power supply structure. Figure 12 The diagram only illustrates that the second power supply structure 22 and the control electrode g of the transistor T are located on the same layer, and is not intended to limit the invention.

[0080] Another embodiment, Figure 13 This is a cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention. (See diagram below.) Figure 13 As shown, the first power supply structure includes a first common electrode 1COM, which is located on the side of the pixel circuit 30 near the pixel array 200. The array substrate 100 also includes a first auxiliary electrode 41 and a second auxiliary electrode 42, both of which are located on the same layer as the first common electrode 1COM. The pixel circuit 30 is connected to the first electrode 11 of the light-emitting diode E through the first auxiliary electrode 41, and the second power supply structure 22 is connected to the second electrode 12 of the light-emitting diode E through the second auxiliary electrode 42. Specifically, the first auxiliary electrode 41 is multiplexed as a first bonding electrode, and the first electrode 11 of the light-emitting diode E is bonded to the first auxiliary electrode 41; the second auxiliary electrode 42 is multiplexed as a second bonding electrode, and the second electrode 12 of the light-emitting diode E is bonded to the second auxiliary electrode 42.

[0081] Specifically, the material used to fabricate the first common electrode includes two or more of gold, aluminum, copper, tin, silver, and indium. During the display panel fabrication, an array substrate and a light-emitting diode (LED) array are fabricated separately. The array substrate includes a first common electrode, a first auxiliary electrode, and a second auxiliary electrode. These electrodes are fabricated on the same layer and made of the same material, and are located on the outermost side of the array substrate. The LED array is then transferred onto the array substrate, and the first electrode of each LED is aligned with the first auxiliary electrode, and the second electrode is aligned with the second auxiliary electrode. A hot-pressing process is then used to melt and solidify the auxiliary electrodes to form a eutectic layer, ultimately achieving bonding between the first and second auxiliary electrodes.

[0082] In some embodiments, the array substrate further includes an electrode connection layer located between the first power supply structure and the light-emitting diodes (LEDs). The electrode connection layer includes a first connection electrode and a second connection electrode. A first auxiliary electrode is electrically connected to the first electrode of the LED via the first connection electrode, and a second auxiliary electrode is electrically connected to the second electrode of the LED via the second connection electrode. During display panel fabrication, the array substrate and LEDs are fabricated separately. The LED array is transferred onto the array substrate and then bonded to it. The bonding layer used for this bonding connection is typically quite thick.

[0083] Specifically, in one embodiment, the electrode connection layer includes a metal connection layer and a bonding layer, with the bonding layer deposited on top of the metal connection layer. The metal connection layer is used to connect to the auxiliary electrode through vias in the insulating layer, and the bonding layer is used to achieve bonding between the light-emitting diode and the array substrate. The bonding layer is made of two or more materials selected from gold, aluminum, copper, tin, silver, and indium. Figure 14 This is a cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention. (See diagram below.) Figure 14As shown, the electrode connection layer 60 includes a metal connection layer 61 and a bonding layer 62. A first insulating layer 104 is disposed on the first common electrode 1COM, and a metal connection layer 61 is disposed on the first insulating layer 104. The metal connection layer 61 includes a first connection portion 61-1 and a second connection portion 61-2. The first connection portion 61-1 is electrically connected to the first auxiliary electrode 41 through a via (not shown) in the first insulating layer 104, and the second connection portion 61-2 is electrically connected to the second auxiliary electrode 42 through a via (not shown) in the first insulating layer 104. The bonding layer 62 includes a first bonding electrode 62-1 and a second bonding electrode 62-2. The first bonding electrode 62-1 is deposited on the first connection portion 61-1, and the second bonding electrode 62-2 is deposited on the second connection portion 61-2. The first electrode 11 of the light-emitting diode E is bonded to the first bonding electrode 62-1, and the second electrode 12 of the light-emitting diode E is bonded to the second bonding electrode 62-2. In this embodiment, the connecting portion in the metal connecting layer is connected to the corresponding auxiliary electrode through the via of the first insulating layer, and then a bonding electrode for bonding is deposited on the connecting portion to adapt to the bonding electrode deposition process and ensure the reliability of the connection between the bonding electrode and the corresponding auxiliary electrode.

[0084] In another embodiment, the electrode connection layer includes only a metal connection layer. During the fabrication of the array substrate, after the first common electrode, the first auxiliary electrode, and the second auxiliary electrode are fabricated, a first insulating layer is fabricated, and then the first insulating layer is patterned to form openings. Then, an electrode connection layer is fabricated on the first insulating layer, including a first connecting electrode and a second connecting electrode. The first connecting electrode is connected to the first auxiliary electrode through a via, and the second connecting electrode is connected to the second auxiliary electrode through a via. A bonding layer is then deposited on the electrode connection layer, including a first bonding electrode and a second bonding electrode. The first bonding electrode is deposited on the first connecting electrode, and the second bonding electrode is deposited on the second connecting electrode. The bonding electrodes are used to achieve bonding connections between the light-emitting diodes and the array substrate. The structure of the display panel in this embodiment can be referenced. Figure 14 Use the illustrations in the diagram to understand.

[0085] In another embodiment, the electrode connection layer is reused as a bonding layer. Figure 15 This is a cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention. (See diagram below.) Figure 15As shown, the electrode connection layer 60 includes a first connection electrode 60-1 and a second connection electrode 60-2. The first connection electrode 60-1 is bonded to the first electrode 11 of the light-emitting diode E, and the second connection electrode 60-2 is bonded to the second electrode 12 of the light-emitting diode E. In the fabrication of the array substrate 100, after the first common electrode 1COM, the first auxiliary electrode 41, and the second auxiliary electrode 42 are fabricated, a first insulating layer 104 is fabricated. Then, the first insulating layer 104 is etched to form grooves that expose the first auxiliary electrode 41 and the second auxiliary electrode 42 respectively (not shown in the figure, wherein the area of ​​the groove is larger than the area of ​​a conventional insulating layer via, and the area of ​​the groove is large enough to ensure that a thick electrode connection layer can be deposited inside it). Then, the electrode connection layer 60 is deposited in the groove. The electrode connection layer deposited in the groove exposing the first auxiliary electrode 41 forms the first connection electrode 60-1, and the electrode connection layer deposited in the groove exposing the second auxiliary electrode 42 forms the second connection electrode 60-2. The light-emitting diode (LED) array is transferred onto an array substrate and aligned, wherein the first electrode of the LED corresponds to the first connecting electrode, and the second electrode of the LED corresponds to the second connecting electrode. Then, a hot-pressing process is used to melt and re-solidify the connecting electrodes to form a eutectic layer, achieving bonding between the first electrode and the first connecting electrode, and between the second electrode and the second connecting electrode. This implementation reduces the need for metal interconnect layers, saving materials and simplifying the manufacturing process.

[0086] The above Figure 14 and Figure 15 The examples illustrate two methods for bonding the light-emitting diodes to the array substrate. Figure 14 The implementation method illustrated in the embodiment is as follows: a connecting metal layer and a bonding layer are fabricated. The bonding layer is used to bond the light-emitting diode. A thicker bonding layer is deposited on the connecting metal layer. The connecting metal layer is connected to the circuit components below through the vias of the insulating layer to ensure the reliability of the connection between the bonding layer and the circuit components below. Figure 15 The illustrated implementation method is as follows: a groove is formed in the insulating layer above the circuit element to expose the circuit element; an electrode connection layer is deposited in the groove to achieve electrical connection between the electrode connection layer and the circuit element below; and the electrode connection layer is reused as a bonding layer. In the following embodiments of the present invention, both of the above methods can be used to achieve bonding connection between the light-emitting diode and the array substrate.

[0087] In one embodiment, the first power supply structure includes a first common electrode, and the second power supply structure includes a second common electrode. Figure 16 This is another schematic cross-sectional view of a display panel provided in an embodiment of the present invention. Figure 16As shown, the first power supply structure 21 includes a first common electrode 1COM, which is located on the side of the pixel circuit 30 near the pixel array 200; the second power supply structure 22 includes a second common electrode 2COM, which is located between the first common electrode 1COM and the pixel circuit 30. The array substrate 100 also includes a first auxiliary electrode 41 and a second auxiliary electrode 42. The first auxiliary electrode 41 is on the same layer as the first common electrode 1COM and is insulated from it, and the second auxiliary electrode 42 is on the same layer as the first common electrode 1COM and is insulated from it. The first electrode (not shown in the figure) of the transistor in the pixel circuit 30 is electrically connected to the first electrode 11 of the light-emitting diode E through the first auxiliary electrode 41, and the second common electrode 2COM is electrically connected to the second electrode 12 of the light-emitting diode E through the second auxiliary electrode 42. In this embodiment, both the first power supply structure and the second power supply structure include a common electrode, which can simultaneously reduce the resistance of the first power supply structure and the second power supply structure, thereby simultaneously reducing the voltage drop on the first power supply structure and the second power supply structure, greatly reducing power consumption loss, and greatly improving display unevenness.

[0088] Continue to refer to Figure 16 As shown, the array substrate 100 also includes a third auxiliary electrode 43, which is on the same layer as the second common electrode 2COM. The first common electrode 1COM is electrically connected to the pixel circuit 30 via the third auxiliary electrode 43. Specifically, the pixel circuit 30 includes multiple transistors (only one is shown in the figure). The first common electrode 1COM is electrically connected to the source or drain of one transistor in the pixel circuit 30 (the specific structure of the transistor is not shown in the figure) via the third auxiliary electrode 43, thereby enabling the first common electrode 1COM to be connected to the first electrode 11 of the light-emitting diode E through the pixel circuit 30. In this embodiment, a second common electrode 2COM is provided between the first common electrode 1COM and the pixel circuit 30. Through the design of the third auxiliary electrode 43, it is not necessary to make deep and large holes in the insulating layer between the film layer where the first common electrode 1COM is located and the film layer where the source and drain of the transistor in the pixel circuit are located, while ensuring the reliability of the connection between the first common electrode 1COM and the source (or drain) of the transistor in the pixel circuit. Moreover, the third auxiliary electrode 43 can be fabricated in the same process as the second common electrode 2COM, without the need for additional process steps.

[0089] In addition, such as Figure 16 As shown, the array substrate also includes a fifth auxiliary electrode 45, which is on the same layer as the second common electrode 2COM. The first auxiliary electrode 41 is electrically connected to the pixel circuit 30 via the fifth auxiliary electrode 45. The fifth auxiliary electrode 45 and the second common electrode 2COM are fabricated in the same process.

[0090] The above Figures 11 to 16 In all embodiments, the second power supply structure is illustrated as being located on the side of the first power supply structure furthest from the light-emitting diode (LED). In other embodiments, the second power supply structure is located between the first power supply structure and the LED, that is, between the first common electrode and the LED. In other words, since the second power supply structure is located on the side of the first common electrode furthest from the pixel circuit, the circuit elements in the second power supply structure and the pixel circuit are not located on the same layer. This increases the design freedom of the second power supply structure, allowing it to include a common electrode to reduce resistance and thus voltage drop, further reducing power consumption of the display panel and improving display uniformity.

[0091] Specifically, in one embodiment, Figure 17 This is another schematic cross-sectional view of a display panel provided in an embodiment of the present invention. Figure 17 As shown, the first power supply structure 21 includes a first common electrode 1COM, and the first auxiliary electrode 41 is located on the same layer as the first common electrode 1COM. The first power supply structure 21 is electrically connected to the first electrode 11 of the light-emitting diode E through the pixel circuit 30. The second power supply structure 22 includes a second common electrode 2COM, which is located between the first common electrode 1COM and the light-emitting diode E. The second power supply structure 22 is electrically connected to the second electrode 12 of the light-emitting diode E. In this embodiment, further including a common electrode in the second power supply structure can reduce the resistance on the second power supply structure, thereby reducing the voltage drop of the second power supply structure, further reducing the power consumption loss of the display panel, and further improving display unevenness. In this embodiment, the second common electrode can be a strip electrode or a block electrode. The setting of the second common electrode can refer to the above. Figures 6 to 9 The examples are explained in detail below.

[0092] Continue to refer to Figure 17 As shown, the array substrate 100 also includes a fourth auxiliary electrode 44, which is on the same layer as the second common electrode 2COM; the first auxiliary electrode 41 is electrically connected to the first electrode 11 of the light-emitting diode E via the fourth auxiliary electrode 44. The fourth auxiliary electrode 44 and the second common electrode 2COM are fabricated in the same process.

[0093] In one embodiment, Figure 18A for Figure 17 A partial top view of the display panel provided in the embodiment. Figure 18A Only the structure of the sub-pixel and the film layer containing the second power supply structure is shown. For example... Figure 18AA sub-pixel row spH extending in a first direction x and a sub-pixel column spL extending in a second direction y are shown. The second common electrode 2COM has a second opening K2 that extends through the second common electrode 2COM in the thickness direction, and a fourth auxiliary electrode 44 is located within the second opening K2. Figure 18A Taking one sub-pixel sp as an example corresponding to one second opening K2, only one fourth auxiliary electrode 44 can be set in one second opening K2. The fourth auxiliary electrode 44 is used to realize the electrical connection between the pixel circuit and the first electrode of the light-emitting diode. While ensuring that the fourth auxiliary electrode 44 and the second common electrode 2COM are mutually insulated, the area of ​​the second opening K2 can be set small enough to maximize the area of ​​the second common electrode in the display area.

[0094] In another embodiment, if one second opening corresponds to two sub-pixels, then two fourth auxiliary electrodes are correspondingly disposed within one second opening. In another embodiment, if one second opening corresponds to three sub-pixels, then three fourth auxiliary electrodes are correspondingly disposed within one second opening. Further illustrations are not provided here.

[0095] Specifically, Figure 18B for Figure 17 Another partial top view of the display panel provided in the embodiment. (See attached diagram.) Figure 18B The diagram shown only illustrates a top view of the first power supply structure. The first power supply structure includes a first common electrode 1COM, which has a first opening K1. A first auxiliary electrode 41 is located within the first opening K1 and is used to establish an electrical connection between the pixel circuit 30 and the first electrode 11 of the light-emitting diode E. In this embodiment, the first power supply structure is located between the pixel circuit 30 and the light-emitting diode E. The first opening K1 is provided only on the first common electrode 1COM. This allows the area of ​​the first opening K1 to be sufficiently small, while ensuring that the first common electrode 1COM and the first auxiliary electrode 41 are mutually insulated, thereby increasing the area of ​​the first common electrode 1COM located in the display area.

[0096] For details, please refer to [link / reference]. Figure 17 As shown, the array substrate 100 also includes a bonding layer 70, with a second power structure 22 located on the bonding layer 70. The second power structure 22 is bonded to the second electrode 12 of the light-emitting diode E. Correspondingly, the fourth auxiliary electrode 44 is bonded to the first electrode 11 of the light-emitting diode E. The materials and bonding process of the bonding layer 70 can be referred to the descriptions in the above-mentioned embodiments, and will not be repeated here. By placing the second power structure in the bonding layer, it is possible to include a common electrode in the second power structure, thereby reducing the resistance on the second power structure, without increasing the film thickness of the display panel.

[0097] In another embodiment, Figure 19 This is another schematic cross-sectional view of a display panel provided in an embodiment of the present invention. Figure 19 As shown, the array substrate 100 further includes an electrode connection layer 60 and a second insulating layer 105. The second insulating layer 105 is located between the second power supply structure 22 and the electrode connection layer 60. The electrode connection layer 60 is located on the side of the second power supply structure 22 away from the first common electrode 1COM. The electrode connection layer 60 includes a first connection electrode 60-1 and a second connection electrode 60-2. The first auxiliary electrode 41 is electrically connected to the first electrode 11 of the light-emitting diode E via the first connection electrode 60-1, and the second power supply structure 22 is electrically connected to the second electrode 12 of the light-emitting diode E via the second connection electrode 60-2. Optionally, the electrode connection layer may include a metal connection layer and a bonding layer, i.e., a metal connection layer and a bonding layer. Figure 14 The electrode connection layer shown in the embodiment has the same structure. Optionally, the electrode connection layer is a bonding layer, that is, it is bonded to... Figure 15 The electrode connection layers illustrated in the embodiments have the same structure.

[0098] In another embodiment, Figure 20 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 20 As shown, the second power supply structure 22 includes a second upper power supply electrode 22-1 and a second lower power supply electrode 22-2 that are electrically connected to each other. The second upper power supply electrode 22-1 is located between the first common electrode 1COM and the light-emitting diode E. The second lower power supply electrode 22-2 includes multiple second power supply lines, which are on the same layer as the first electrode d of the transistor T. Specifically, the data lines in the display panel are on the same layer as the first electrode d. The second power supply lines are set to extend in the same direction as the data lines to ensure that the second power supply lines are insulated from each other and from both the first electrode and the second electrode. In this embodiment, the interconnection of the second upper power supply electrode and the second lower power supply electrode can further reduce the resistance of the second power supply structure. Moreover, since the second power supply lines in the second lower power supply electrode are on the same layer as the first electrode of the transistor, it is not necessary to add an additional film layer structure in the display panel.

[0099] In some optional implementations, a sub-pixel includes at least two light-emitting diodes (LEDs), and all LEDs in a sub-pixel are connected to the same first auxiliary electrode. That is, all LEDs in a sub-pixel are connected to the same pixel circuit, which can reduce the impact of poor bonding between the LEDs and the array substrate on the sub-pixel display. Even if some LEDs in a sub-pixel are poorly bonded, the remaining well-bonded LEDs can still enable the sub-pixel to display.

[0100] The above Figure 3 , Figures 11 to 16In both cases, the first power supply structure is located on the side of the second power supply structure closer to the pixel array. When the first power supply structure includes a common electrode, a first auxiliary electrode and a second auxiliary electrode are disposed on the same layer as the common electrode. The first power supply structure is connected to the pixel circuit, and the pixel circuit is connected to the first electrode of the light-emitting diode (LED) through the first auxiliary electrode. The second power supply structure is connected to the second electrode of the LED through the second auxiliary electrode. Specifically... Figure 21 This is a top view schematic diagram of another display panel provided in an embodiment of the present invention. Figure 21 The diagram only simplifies the illustration of the first power supply structure 21 and the light-emitting diodes (LEDs) E in the sub-pixels. Taking a sub-pixel sp as an example, the diagram illustrates the first power supply structure 21 as including a first common electrode 1COM with a first opening K1. A first auxiliary electrode 41 and a second auxiliary electrode 42 are disposed within the first opening K1. The first electrodes (not shown) of the two LEDs E are connected to the same first auxiliary electrode 41, and the second electrodes (not shown) of the two LEDs E are also connected to the same first auxiliary electrode 41. Embodiments where the first common electrode is a strip electrode, and where one first opening corresponds to two or three sub-pixels, can be understood by referring to this diagram and will not be elaborated further here.

[0101] In the above Figure 19 and Figure 20 In this embodiment, the second power supply structure is located on the side of the first power supply structure closer to the pixel array. When the second power supply structure includes a common electrode, a first auxiliary electrode is typically provided on the common electrode to ensure that the pixel circuit below the second power supply structure can be electrically connected to the first electrode of the light-emitting diode through the first auxiliary electrode. Specifically, Figure 22 This is a top view schematic diagram of another display panel provided in an embodiment of the present invention. Figure 22 The diagram only simplifies the illustration of the second power supply structure 22 and the light-emitting diodes (LEDs) E in the sub-pixel. Taking a sub-pixel sp containing two LEDs E as an example, the diagram illustrates the second power supply structure 22 as including a second common electrode 2COM with a second opening K2. A first auxiliary electrode 41 is disposed within the second opening K2. The first electrodes (not shown) of the two LEDs E are connected to the same first auxiliary electrode 41, and the second electrodes (not shown) of both LEDs E are electrically connected to the second common electrode 2COM. Embodiments where the second common electrode is a strip electrode, or where one second opening corresponds to two or three sub-pixels, can be understood by referring to this diagram and will not be elaborated further here.

[0102] Furthermore, in some implementations, Figure 23 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 23As shown, the display panel also includes a light-shielding layer 80, which is located on the side of the first power supply structure 21 and the second power supply structure 22 near the light-emitting diode E. In a direction perpendicular to the plane of the array substrate 100, the light-shielding layer 80 overlaps with the first power supply structure 21, or the light-shielding layer 80 overlaps with the second power supply structure 22. The light-shielding layer 80 includes a third opening K3, which overlaps with the light-emitting diode E in a direction perpendicular to the plane of the array substrate 100. Figure 23 The diagram illustrates the first power supply structure 21 located on the side of the second power supply structure 22 furthest from the pixel circuit 30. In embodiments where the first power supply structure 21 includes a first common electrode and / or the second power supply structure 22 includes a second common electrode, the large-area common electrode can reflect ambient light, thus affecting the display panel's performance. In this embodiment, by providing a light-shielding layer, the large-area common electrode can be blocked, preventing ambient light from reflecting off the common electrode and thus ensuring the display panel's performance.

[0103] Furthermore, in this embodiment of the invention, the common electrode includes a fourth opening, which is filled by an insulating layer that is in direct contact with the common electrode. The common electrode is typically made of a metallic material, while the insulating layers adjacent to the common electrode are typically made of inorganic materials. By providing a fourth opening on the common electrode, the adhesion between the large-area common electrode and its adjacent insulating layers can be improved, preventing film peeling from occurring on the large-area common electrode. Figure 24 This is a top view schematic diagram of another first power supply structure in a display panel provided by an embodiment of the present invention, as shown below. Figure 24 As shown, the first power supply structure 21 includes a first common electrode 1COM, which includes a first opening K1 and a fourth opening K4. In some embodiments, a first auxiliary electrode is disposed within the first opening K1; in some embodiments, a first auxiliary electrode and a second auxiliary electrode are disposed within the first opening K2. The fourth opening K4 is used to ensure reliable adhesion between the first common electrode 1COM and the upper and lower insulating layers. The area of ​​the fourth opening K4 is smaller than the area of ​​the first opening K1. To ensure reliable adhesion between the common electrode and the upper and lower insulating layers at different locations, multiple fourth openings can be provided on the common electrode at a position corresponding to a sub-pixel, resulting in a higher density of fourth openings than the density of first openings. Figure 24 The illustration only shows the first common electrode including the first opening. In embodiments where the first common electrode is a strip electrode, a fourth opening may also be provided on the strip electrode, which will not be shown in the accompanying drawings. Furthermore, in embodiments where the second power supply structure includes a common electrode, the arrangement of the common electrode including the fourth opening can also be understood by referring to this example, and will not be elaborated upon here.

[0104] In this embodiment of the invention, the second common electrode overlaps with the first common electrode in a direction perpendicular to the plane of the array substrate. In the display area, the area of ​​the overlapping portion of the second common electrode and the first common electrode is S2, and the area of ​​the portion of the second common electrode located in the display area projected onto the plane of the display panel is S3, where S2 ≥ 50%S3. In this embodiment, the area of ​​the portion of the first common electrode located in the display area projected onto the display panel is not less than 50% of the display area, and the area of ​​the portion of the second common electrode located in the display area projected onto the display panel is not less than 50% of the display area. Simultaneously, the overlapping area of ​​the first and second common electrodes is relatively large. Compared with related technologies, this significantly reduces the resistance of the first and second power supply structures, thereby reducing the voltage drop of the transmitted signal on the power supply structure, reducing power consumption loss on the power supply structure, and improving the display unevenness problem.

[0105] This invention also provides a display device. Figure 25 This is a schematic diagram of a display device provided in an embodiment of the present invention, such as... Figure 25 As shown, the display device includes a display panel 00 provided in any embodiment of the present invention. The structure of the display panel has been described in the above embodiments and will not be repeated here. In the embodiments of the present invention, the display device can be any device with display functionality, such as a mobile phone, tablet computer, laptop computer, e-reader, television set, smart wearable product, etc.

[0106] 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.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, Includes array substrate and pixel array; The pixel array includes a plurality of sub-pixels, and each sub-pixel includes at least one light-emitting diode, the light-emitting diode including a first electrode and a second electrode; The array substrate includes a first power supply structure, a second power supply structure, and a plurality of pixel circuits. The first power supply structure is used to provide a first power supply voltage, and the second power supply structure is used to provide a second power supply voltage. The first power supply structure is electrically connected to the first electrode of the light-emitting diode through the pixel circuits, and the second power supply structure is electrically connected to the second electrode of the light-emitting diode. At least one of the first power supply structure and the second power supply structure includes at least one common electrode; The first power supply structure includes at least one of the common electrodes, and the common electrode included in the first power supply structure is a first common electrode, which is located on the side of the pixel circuit closer to the pixel array; The array substrate further includes a first auxiliary electrode, which is on the same layer as the first common electrode and is insulated from it. The pixel circuit includes at least one transistor, the transistor including a first electrode, a second electrode and a control electrode, the first electrode of the transistor being electrically connected to the first electrode of the light-emitting diode via the first auxiliary electrode; The second power supply structure is located between the first common electrode and the light-emitting diode; The second power supply structure includes at least one of the common electrodes, and the common electrode included in the second power supply structure is a second common electrode; in, The array substrate further includes a fourth auxiliary electrode, which is on the same layer as the second common electrode; the first auxiliary electrode is electrically connected to the first electrode of the light-emitting diode via the fourth auxiliary electrode. or, In a direction perpendicular to the plane of the array substrate, the second common electrode overlaps with the first common electrode.

2. The display panel according to claim 1, characterized in that, The common electrode includes a fourth opening, which is filled by an insulating layer that is in direct contact with the common electrode.

3. The display panel according to claim 2, characterized in that, One of the common electrodes includes a plurality of the fourth openings.

4. The display panel according to claim 3, characterized in that, The common electrode has multiple fourth openings at the positions corresponding to one of the sub-pixels.

5. The display panel according to claim 2, characterized in that, The first common electrode has a first opening that extends through the first common electrode in the thickness direction, and the first auxiliary electrode is located within the first opening.

6. The display panel according to claim 5, characterized in that, The area of ​​the fourth opening is smaller than the area of ​​the first opening.

7. The display panel according to claim 5, characterized in that, The density of the fourth opening is greater than the density of the first opening.

8. The display panel according to claim 5, characterized in that, One first opening corresponds to n sub-pixels, where n is greater than or equal to 2; one first opening contains n first auxiliary electrodes.

9. The display panel according to claim 8, characterized in that, One of the first openings corresponds to three of the sub-pixels.

10. The display panel according to claim 2, characterized in that, The second common electrode has a second opening that extends through the second common electrode in the thickness direction, and the fourth auxiliary electrode is located in the second opening.

11. The display panel according to claim 10, characterized in that, The area of ​​the fourth opening is smaller than the area of ​​the second opening.

12. The display panel according to claim 10, characterized in that, The density of the fourth opening is greater than the density of the second opening.

13. The display panel according to claim 10, characterized in that, One second opening corresponds to n sub-pixels, where n is greater than or equal to 2; one second opening contains n first auxiliary electrodes.

14. The display panel according to claim 13, characterized in that, One of the second openings corresponds to three of the sub-pixels.

15. The display panel according to claim 1, characterized in that, In the display area of ​​the display panel, the area of ​​the portion where the second common electrode overlaps with the first common electrode is S2, and the area of ​​the portion of the second common electrode located in the display area projected onto the plane of the display panel is S3, wherein S2 ≥ 50% S3.

16. The display panel according to claim 1, characterized in that, The first power supply structure further includes a first power line, which is electrically connected to the first common electrode; The first power line is on the same layer as the first electrode of the transistor.

17. The display panel according to claim 1, characterized in that, The first common electrode includes at least two stacked first sub-common electrodes that are electrically connected to each other, and an insulating layer is included between adjacent first sub-common electrodes.

18. The display panel according to claim 1, characterized in that, It also includes a second auxiliary electrode, which is in the same layer as the first common electrode and is insulated from it; The second power supply structure is electrically connected to the second electrode of the light-emitting diode via the second auxiliary electrode.

19. The display panel according to claim 18, characterized in that, The first auxiliary electrode is reused as the first bonding electrode, and the first electrode of the light-emitting diode is bonded to the first auxiliary electrode; The second auxiliary electrode is reused as the second bonding electrode, and the second electrode of the light-emitting diode is bonded to the second auxiliary electrode.

20. The display panel according to claim 18, characterized in that, The array substrate further includes an electrode connection layer and a first insulating layer. The electrode connection layer is located between the first common electrode and the light-emitting diode, and the first insulating layer is located between the first common electrode and the electrode connection layer. The electrode connection layer includes a first connection electrode and a second connection electrode. The first auxiliary electrode is electrically connected to the first electrode of the light-emitting diode via the first connection electrode, and the second auxiliary electrode is electrically connected to the second electrode of the light-emitting diode via the second connection electrode.

21. The display panel according to claim 20, characterized in that, The first connecting electrode is bonded to the first electrode of the light-emitting diode, and the second connecting electrode is bonded to the second electrode of the light-emitting diode.

22. The display panel according to claim 18, characterized in that, The second power supply structure includes at least one of the common electrodes, and the common electrode included in the second power supply structure is a second common electrode, which is located between the first common electrode and the pixel circuit.

23. The display panel according to claim 22, characterized in that, The array substrate further includes a third auxiliary electrode, which is on the same layer as the second common electrode. The first common electrode is electrically connected to the pixel circuit via the third auxiliary electrode.

24. The display panel according to claim 18, characterized in that, The second power supply structure is located on the side of the first common electrode away from the light-emitting diode, and includes multiple second power lines, which are on the same layer as the first electrode of the transistor.

25. The display panel according to claim 1, characterized in that, The display panel further includes a display area with an area of ​​S0, and the area of ​​the portion of the common electrode located in the display area projected onto the plane of the display panel is S1, wherein S1 ≥ 0.5S0.

26. The display panel according to claim 1, characterized in that, The common electrode is disposed across the entire display area of ​​the display panel; The array substrate further includes a substrate located on the side of the pixel circuit away from the light-emitting diode, and the common electrode is located between the substrate and the pixel circuit.

27. The display panel according to claim 1, characterized in that, The pixel array includes a plurality of sub-pixel rows extending in a first direction and a plurality of sub-pixel columns extending in a second direction, the first direction and the second direction intersecting. The common electrode includes multiple strip electrodes. Within the display area of ​​the display panel, the multiple strip electrodes extend along the first direction and are arranged along the second direction, or the multiple strip electrodes extend along the second direction and are arranged along the first direction.

28. The display panel according to claim 1, characterized in that, Each of the sub-pixels includes at least two light-emitting diodes, and all of the light-emitting diodes in each sub-pixel are connected to the same first auxiliary electrode.

29. The display panel according to claim 1, characterized in that, The first power supply voltage is higher than the second power supply voltage.

30. The display panel according to claim 1, characterized in that, The light-emitting diode further includes a first semiconductor layer, a quantum well layer, and a second semiconductor layer stacked together, wherein the quantum well layer is located between the first semiconductor layer and the second semiconductor layer, the first electrode is connected to the first semiconductor layer, and the second electrode is connected to the second semiconductor layer; in, The first semiconductor layer is located on the side of the second semiconductor layer closest to the pixel circuit, the first electrode is located on the side of the first semiconductor layer closest to the pixel circuit, and the second electrode is located on the side of the second semiconductor layer closest to the pixel circuit; or, The first semiconductor layer is located on the side of the second semiconductor layer closer to the pixel circuit, the first electrode is located on the side of the first semiconductor layer closer to the pixel circuit, and the second electrode is located on the side of the second semiconductor layer farther from the pixel circuit; or, The first semiconductor layer is located on the side of the second semiconductor layer away from the pixel circuit, the first electrode is located on the side of the first semiconductor layer away from the pixel circuit, and the second electrode is located on the side of the second semiconductor layer away from the pixel circuit.

31. The display panel according to claim 1, characterized in that, It also includes a light-shielding layer located on the side of the first power supply structure and the second power supply structure near the light-emitting diode; In a direction perpendicular to the plane of the array substrate, the light-shielding layer overlaps with the first power supply structure, or the light-shielding layer overlaps with the second power supply structure; The light-shielding layer includes a third opening, which overlaps with the light-emitting diode in a direction perpendicular to the plane of the array substrate.

32. A display panel, characterized in that, Includes array substrate and pixel array; The pixel array includes a plurality of sub-pixels, and each sub-pixel includes at least one light-emitting diode, the light-emitting diode including a first electrode and a second electrode; The array substrate includes a first power supply structure, a second power supply structure, and a plurality of pixel circuits. The first power supply structure is used to provide a first power supply voltage, and the second power supply structure is used to provide a second power supply voltage. The first power supply structure is electrically connected to the first electrode of the light-emitting diode through the pixel circuits, and the second power supply structure is electrically connected to the second electrode of the light-emitting diode. At least one of the first power supply structure and the second power supply structure includes at least one common electrode; The first power supply structure includes at least one of the common electrodes, and the common electrode included in the first power supply structure is a first common electrode, which is located on the side of the pixel circuit closer to the pixel array; The array substrate further includes a first auxiliary electrode, which is on the same layer as the first common electrode and is insulated from it. The pixel circuit includes at least one transistor, the transistor including a first electrode, a second electrode and a control electrode, the first electrode of the transistor being electrically connected to the first electrode of the light-emitting diode via the first auxiliary electrode; The second power supply structure is located between the first common electrode and the light-emitting diode; in, The array substrate further includes a bonding layer, the second power structure is located on the bonding layer, and the second power structure is bonded to the second electrode of the light-emitting diode; or, The array substrate further includes an electrode connection layer and a second insulating layer. The second insulating layer is located between the second power structure and the electrode connection layer. The electrode connection layer is located on the side of the second power structure away from the first common electrode. The electrode connection layer includes a first connection electrode and a second connection electrode. The first auxiliary electrode is electrically connected to the first electrode of the light-emitting diode via the first connection electrode. The second power structure is electrically connected to the second electrode of the light-emitting diode via the second connection electrode.

33. A display panel, characterized in that, Includes array substrate and pixel array; The pixel array includes a plurality of sub-pixels, and each sub-pixel includes at least one light-emitting diode, the light-emitting diode including a first electrode and a second electrode; The array substrate includes a first power supply structure, a second power supply structure, and a plurality of pixel circuits. The first power supply structure is used to provide a first power supply voltage, and the second power supply structure is used to provide a second power supply voltage. The first power supply structure is electrically connected to the first electrode of the light-emitting diode through the pixel circuits, and the second power supply structure is electrically connected to the second electrode of the light-emitting diode. At least one of the first power supply structure and the second power supply structure includes at least one common electrode; The first power supply structure includes at least one of the common electrodes, and the common electrode included in the first power supply structure is a first common electrode, which is located on the side of the pixel circuit closer to the pixel array; The array substrate further includes a first auxiliary electrode, which is on the same layer as the first common electrode and is insulated from it. The pixel circuit includes at least one transistor, the transistor including a first electrode, a second electrode and a control electrode, the first electrode of the transistor being electrically connected to the first electrode of the light-emitting diode via the first auxiliary electrode; The second power supply structure includes a second upper power supply electrode and a second lower power supply electrode that are electrically connected to each other. The second upper power supply electrode is located between the first common electrode and the light-emitting diode. The second lower power supply electrode includes multiple second power supply lines, which are on the same layer as the first electrode of the transistor.

34. A display device, characterized in that, Includes the display panel as described in any one of claims 1-33.

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