Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate and a plurality of sub-pixels located on one side of the substrate, and each sub-pixel comprises a first electrode, a second electrode and a light-emitting element; the first power supply is electrically connected with the first electrode; at least one sub-pixel comprises M light-emitting elements which are connected in series, M is an integer and is greater than or equal to 2, and the M light-emitting elements comprise a first light-emitting element and a second light-emitting element; the light-emitting element comprises a first pole and a second pole, the first pole of the first light-emitting element points to the second pole of the first light-emitting element, and the direction of the first pole of the second light-emitting element points to the second pole of the second light-emitting element. The invention provides a display panel and a display device so as to reduce the bonding difficulty and ensure the display effect of the display panel.

Description

Technical Field

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

[0002] LED (light-emitting diode) can efficiently convert electrical energy into light energy, and has the characteristics of small size, long life, high efficiency, energy saving, rich colors, etc. With the continuous advancement of technology, LED has been widely used in the fields of photography, flat panel display, medical devices, etc. When used in the display field, some sub-pixels have the problem of bonding difficulty, which easily causes the risk of display failure. Summary of the invention

[0003] The present invention provides a display panel and a display device to reduce the bonding difficulty and ensure the display effect of the display panel.

[0004] In a first aspect, the present invention provides a display panel, comprising:

[0005] A substrate and a plurality of sub-pixels located on one side of the substrate, wherein the sub-pixels include a first electrode, a second electrode and a light-emitting element;

[0006] a first power source, electrically connected to the first electrode;

[0007] At least one of the sub-pixels includes M light-emitting elements connected in series, where M is an integer, M≥2, and the M light-emitting elements include a first light-emitting element and a second light-emitting element;

[0008] The light emitting element includes a first pole and a second pole, and the first pole of the first light emitting element points to a direction of the second pole of the first light emitting element, which is consistent with a direction in which the first pole of the second light emitting element points to the second pole of the second light emitting element.

[0009] In a second aspect, the present invention provides a display device, comprising the display panel described in any one of the first aspects.

[0010] The technical solution of the embodiment of the present invention is that at least one sub-pixel in the display panel includes M light-emitting elements connected in series, and the light-emitting elements are arranged in series to improve the brightness of the sub-pixel. And the direction in which the first pole of the first light-emitting element points to the second pole of the first light-emitting element is set to be consistent with the direction in which the first pole of the second light-emitting element points to the second pole of the second light-emitting element, thereby reducing the difficulty of transfer bonding between the first light-emitting element and the second light-emitting element, reducing the probability of confusion in the electrode orientation, and reducing the risk of display failure of the display panel.

[0011] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0014] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the middle section line AA';

[0015] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0016] Figure 4 for Figure 1 A schematic structural diagram of a fourth metal layer in;

[0017] Figure 5 for Figure 1 A schematic structural diagram of a third metal layer;

[0018] Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0019] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0020] Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0021] Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0022] Fig.10 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0023] Fig.11 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0024] Fig.12A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0025] Fig.13 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0026] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure along the middle section line BB';

[0027] Fig.15 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0028] Fig.16 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0029] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0030] Fig.18 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0031] Fig.19 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0032] Fig. 20 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention, Figure 2 for Figure 1 The cross-sectional structure diagram of the middle section line AA' is as follows: Figure 1 and Figure 2 As shown, the display panel 100 includes a substrate 10 and a plurality of sub-pixels 101 located on one side of the substrate 10. The sub-pixel 101 includes a first electrode 102, a second electrode 103 and a light-emitting element 104. The display panel 100 includes a first power source 107, and the first power source 107 is electrically connected to the first electrode 102. At least one sub-pixel 101 includes M light-emitting elements 104 connected in series, where M is an integer, M≥2, and the M light-emitting elements 104 include a first light-emitting element 1041 and a second light-emitting element 1042. The light-emitting element 104 includes a first pole 105 and a second pole 106, and the first pole 105 of the first light-emitting element 1041 points to the direction of the second pole 106 of the first light-emitting element 1041, which is consistent with the direction in which the first pole 105 of the second light-emitting element 1042 points to the second pole 106 of the second light-emitting element 1042. That is, the first pole 105 of the first light emitting element 1041 points to the second pole 106 of the first light emitting element 1041, which is the same as the direction in which the first pole 105 of the second light emitting element 1042 points to the second pole 106 of the second light emitting element 1042. The positive and negative poles of the first light emitting element 1041 and the second light emitting element 1042 are arranged in the same direction.

[0036] Among them, a plurality of sub-pixels 101 are arranged in the display panel 100, at least one sub-pixel 101 includes at least M light-emitting elements 104 connected in series, exemplarily M=2, and the two light-emitting elements 104 include a first light-emitting element 1041 and a second light-emitting element 1042, the first light-emitting element 1041 and the second light-emitting element 1042 have the same light-emitting color, and the brightness of the sub-pixel 101 is improved by connecting the first light-emitting element 1041 and the second light-emitting element 1042 in series. The light-emitting element 104 can be an LED, such as a Micro LED or a Mini LED. The first power supply 107 includes a first power supply line 1071 extending along a first direction Y, and the first power supply line 1071 can be a PVEE power supply line. The first power supply line 1071 provides a first power supply signal to the first electrode 102, and the first power supply signal is a low-level voltage. The display panel 100 also includes a pixel driving circuit 108 and a second power supply line 1091 located between the substrate 10 and the sub-pixel 101, and the second power supply line 1091 can be a PVDD power supply line. The second electrode 103 is connected to the second power line 1091 via the pixel driving circuit 108, and the second power line 1091 provides the second power signal to the second electrode 103, and the second power signal is a high level voltage. When the first pole 105 of the light-emitting element 104 is a positive pole and the second pole 106 of the light-emitting element 104 is a negative pole, the first pole 105 of the light-emitting element 104 is connected to the second electrode 103, and the second pole 106 of the light-emitting element 104 is connected to the first electrode 102; when the first pole 105 of the light-emitting element 104 is a negative pole and the second pole 106 of the light-emitting element 104 is a positive pole, the first pole 105 of the light-emitting element 104 is connected to the first electrode 102, and the second pole 106 of the light-emitting element 104 is connected to the second electrode 103. In the embodiments of the present application, the first pole 105 of the light-emitting element 104 is a negative pole and the second pole 106 of the light-emitting element 104 is a positive pole for display. When the first light-emitting element 1041 and the second light-emitting element 1042 are connected in series, the first pole 105 of the first light-emitting element 1041 points to the direction of the second pole 106 of the first light-emitting element 1041, so that the electrodes of the first light-emitting element 1041 and the second light-emitting element 1042 are in the same direction, which is consistent with the direction in which the first pole 105 of the second light-emitting element 1042 points to the second pole 106 of the second light-emitting element 1042, and Figure 1 The first direction Y shown in the figure is consistent, which reduces the probability of causing confusion in the electrode orientation during the transfer of the light-emitting element 104, reduces the difficulty of bonding the light-emitting element 104 to the first electrode 102 and the second electrode 103, ensures the preparation effect of the display panel 100, and reduces the risk of display failure of the display panel 100.

[0037] In other embodiments, the first power source 107 may also be configured as a whole-surface electrode. And / or, the second power source 109 may also be configured as a whole-surface electrode. Figure 1In the figure, the first power line 1071 and the second power line 1091 are staggered to illustrate the stacked arrangement. In an actual product, the first power line 1071 and the second power line 1091 may be staggered along the second direction X, or may not be staggered.

[0038] In the embodiment of the present invention, the display brightness of the sub-pixel is improved by providing multiple light-emitting elements connected in series for at least one sub-pixel in the display panel. The direction in which the first pole of the first light-emitting element points to the second pole of the first light-emitting element is consistent with the direction in which the first pole of the second light-emitting element points to the second pole of the second light-emitting element, thereby reducing the difficulty of transfer bonding between the first light-emitting element and the second light-emitting element, reducing the probability of confusion in the electrode orientation, and reducing the risk of display failure of the display panel.

[0039] The display panel 100 further includes an intermediate electrode 110, through which the first light emitting element 1041 and the second light emitting element 1042 are connected; the first electrode 102 and the second electrode 103 are located on opposite sides of the intermediate electrode 110. Specifically, Figure 3 A schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 1 and Figure 3 , the second pole 106 of the first light-emitting element 1041 is connected to the first pole 105 of the second light-emitting element 1042 through the intermediate electrode 110, and the first pole 105 of the first light-emitting element 1041 and the second pole 106 of the second light-emitting element 1042 are respectively located on opposite sides of the intermediate electrode 110. Or, referring to Figure 5 The first pole 105 of the first light-emitting element 1041 and the second pole 106 of the second light-emitting element 1042 are connected through the intermediate electrode 110, and the second pole 106 of the first light-emitting element 1041 and the first pole 105 of the second light-emitting element 1042 are respectively located on the opposite sides of the intermediate electrode 110. The above methods can realize the series connection between the first light-emitting element 1041 and the second light-emitting element 1042, and ensure that the electrodes of the first light-emitting element 1041 and the second light-emitting element 1042 are oriented in the same direction, reduce the difficulty of transfer bonding of the light-emitting element 104, and ensure the preparation effect of the display panel 100.

[0040] Continue to refer Figure 1 and Figure 2, in a direction Z perpendicular to the substrate 10, the first pole 105 of the first light-emitting element 1041 overlaps and is electrically connected to the first electrode 102, and the second pole 106 of the second light-emitting element 1042 overlaps and is electrically connected to the second electrode 103. The first pole 105 of the first light-emitting element 1041 receives a low-level voltage output from the first power line 1071 via the first electrode 102. The second pole 106 of the second light-emitting element 1042 receives a high-level voltage output from the second power line 1091 via the second electrode 103. The first pole 105 of the first light-emitting element 1041 is arranged to overlap with the first electrode 102, and the second pole 106 of the second light-emitting element 1042 is arranged to overlap with the second electrode 103, so as to avoid increasing the occupied width of the first pole 105, the second pole 106, the first electrode 102, and the second electrode 103 in the second direction X, thereby saving wiring space and meeting the application requirements of high PPI (Pixels Per Inch, pixel density).

[0041] exist Figure 2 The bonding layer is omitted, and the first electrode 105 or the second electrode 106 of the light-emitting element 104 is connected to the corresponding electrode (for example, the first electrode 102, the second electrode 103 and the intermediate electrode 110) through the bonding layer.

[0042] Figure 4 for Figure 1 A schematic diagram of the structure of a fourth metal layer in FIG. Figure 1 , Figure 2 and Figure 4 , the middle electrode 110 includes a first end 1101, a middle portion 1102 and a second end 1103, the middle portion 1102 connects the first end 1101 and the second end 1103; in the direction Z perpendicular to the substrate 10, the first end 1101 overlaps and is electrically connected to the second pole 106 of the first light-emitting element 1041, and the second end 1103 overlaps and is electrically connected to the first pole 105 of the second light-emitting element 1042. On the basis of ensuring the connection effect of the light-emitting element 104 with the first electrode 102 and the second electrode 103 respectively, the overlapping design can reduce the occupied width of the middle electrode 110, the first pole 105 and the second pole 106 of the light-emitting element 104 in the second direction X, save wiring space, and meet the application requirements of high PPI. Furthermore, the first end 1101, the second end 1103, the middle portion 1102, the first electrode 102 and the second electrode 103 can also be arranged in the same layer, which can reduce the film thickness of the display panel 100, reduce the process, and reduce the manufacturing cost.

[0043] Continue to refer Figure 1 and Figure 2, the first power source 107 includes a first power line 1071 extending along a first direction Y; the display panel 100 also includes a first auxiliary power line 111 extending along a second direction X, the first direction Y and the second direction X intersect; illustratively, the first direction Y and the second direction X are perpendicular to each other. Two adjacent first power lines 1071 are electrically connected through the first auxiliary power lines 111. The first auxiliary power lines 111 and the first power lines 1071 form a grid-like wiring, thereby improving the in-plane uniformity of the first power signal, reducing power consumption and improving display uniformity.

[0044] Furthermore, the first auxiliary power line 111 and the first end 1101 of the middle electrode 110 can be prepared using the same metal layer, so that the first auxiliary power line 111 is arranged on the same layer as the first end 1101. Thus, the first power line 1071, the first end 1101, the second end 1103, the middle portion 1102, the first auxiliary power line 111, the first electrode 102, and the second electrode 103 are all prepared using the same fourth metal layer, which can reduce the film thickness of the display panel 100, reduce the process steps, and reduce the manufacturing cost.

[0045] Figure 5 for Figure 1 A schematic diagram of the structure of a third metal layer in FIG. Figure 1 , Figure 2 and Figure 5 The display panel 100 also includes a second power supply 109, the second power supply 109 includes a second power supply line 1091 extending along the first direction Y, the second power supply line 1091 provides a second power supply signal, the display panel 100 also includes a second auxiliary power supply line 112, the second power supply line 1091 extends in a direction from the first pole 105 of the first light-emitting element 1041 to the second pole 106 of the first light-emitting element 1041, the second auxiliary power supply line 112 extends along the second direction X, the second power supply line 1091 and the second auxiliary power supply line 112 are in the same layer, and are both prepared using the third metal layer M3. Two adjacent second power supply lines 1091 are electrically connected through the second auxiliary power supply line 112, which can form a grid-like wiring, thereby improving the in-plane uniformity of the first power supply signal and the second power supply signal, reducing power consumption and improving display uniformity.

[0046] In addition, the display panel 100 can also be divided into a light-transmitting area Q1 and a circuit area Q2, wherein the light-emitting element 104, the pixel driving circuit 108, the first power line 1071, the first auxiliary power line 111, the second power line 1091 and the second auxiliary power line 112 are all located in the circuit area Q2. Figure 1As shown, along the first direction Y, the second auxiliary power line 112 is located between the first auxiliary power line 111 and the light-transmitting area Q1. The first electrode 105, the first electrode 102, and the first auxiliary power line 111 are arranged to overlap, reduce the width of the circuit area Q2 in the first direction Y, increase the area of ​​the light-transmitting area Q1 of the display panel 100 in the first direction Y, and increase the light transmittance of the display panel 100.

[0047] Continue to refer Figure 1 and Figure 2 , the first light-emitting element 1041 is moved toward the side close to the first auxiliary power line 111, so that in the first direction Y, the first light-emitting element 1041 and the second light-emitting element 1042 are misaligned, and the first auxiliary power line 111 is reused as the first electrode 102. In the direction perpendicular to the substrate 10, the first pole 105 of the first light-emitting element 1041 overlaps with the first auxiliary power line 111, and the first pole 105 of the first light-emitting element 1041, the first electrode 102, and the first auxiliary power line 111 share the space in the first direction Y, thereby shortening the space occupied in the first direction Y.

[0048] More importantly, the electrodes of the first light-emitting element 1041 and the second light-emitting element 1042 are arranged in the same direction, and the first light-emitting element 1041 is moved toward the side close to the first auxiliary power line 111, so that the first light-emitting element 1041 and the second light-emitting element 1042 are misaligned in the first direction Y, and the distance between the second pole 106 of the first light-emitting element 1041 and the first pole 105 of the second light-emitting element 1042 is reduced. Therefore, it is convenient to simplify the shape of the middle electrode 110, reduce the length of the middle electrode 110, and reduce the difficulty of setting the middle electrode 110. In addition, the space occupied by the first light-emitting element 1041, the second light-emitting element 1042 and the middle electrode 110 can be reduced in the first direction Y and the second direction X. The area of ​​the light-transmitting area Q1 in the first direction Y is increased, the transmittance of the display panel 100 is increased, and the PPI of the display panel 100 is increased.

[0049] As another possible implementation, Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 6As shown, along the first direction Y, the first auxiliary power line 111 is located between the second auxiliary power line 112 and the light-transmitting area Q1, and the first light-emitting element 1041 is moved toward the side close to the first auxiliary power line 111, so that in the first direction Y, the first light-emitting element 1041 and the second light-emitting element 1042 are misaligned, and the first auxiliary power line 111 is reused as the first electrode 102. In the direction perpendicular to the substrate 10, the first pole 105 of the first light-emitting element 1041 overlaps with the first auxiliary power line 111, and the first pole 105 of the first light-emitting element 1041, the first electrode 102, and the first auxiliary power line 111 share the space in the first direction Y, thereby shortening the space occupied in the first direction Y.

[0050] Based on the above embodiments, there are many different configurations of the intermediate electrode 110 , which will be described in detail below using a feasible configuration as an example. Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, the first pole 105 of the first light-emitting element 1041 points to the direction of the second pole 106 of the first light-emitting element 1041, which intersects with the extension direction of the middle portion 1102. The first pole 105 of the first light-emitting element 1041 points to the direction of the second pole 106 of the first light-emitting element 1041, which is consistent with the first direction Y. The first direction Y and the second direction X are perpendicular to each other, and the extension direction of the middle portion 1102 intersects with both the first direction Y and the second direction X. When the first light-emitting element 1041 and the second light-emitting element 1042 are arranged side by side along the second direction X, the middle portion 1102 is tilted at a certain angle, which can reduce the space occupied by the middle portion 1102 in the second direction X. It can also avoid the middle portion 1102 from intersecting with the same layer of metal (such as Figure 7 The auxiliary metal connected to the first pole 105 of the first light-emitting element 1041 and the auxiliary metal connected to the second pole 106 of the second light-emitting element 1042 are in contact with each other to reduce the risk of short circuit.

[0051] Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the first pole 105 of the first light-emitting element 1041 points to the direction of the second pole 106 of the first light-emitting element 1041, which is consistent with the first direction Y, the first direction Y and the second direction X are perpendicular to each other, the extension direction of the middle portion 1102 is consistent with the first direction Y, and the extension direction of the middle portion 1102 is perpendicular to the second direction X. When the first light-emitting element 1041 and the second light-emitting element 1042 are arranged side by side along the second direction X, by adjusting the extension direction of the middle portion 1102, the vertical projection of the middle electrode 110 is in an inverted Z shape, which reduces the difficulty of preparing the middle electrode 110 and ensures the connection effect between the first light-emitting element 1041 and the second light-emitting element 1042.

[0052] Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown in the above Figure 8 On the basis of the display panel 100, the overlap between the middle electrode 110 and the second auxiliary power line 112 is adjusted to further reduce the space occupied in the first direction Y, increase the area of ​​the light-transmitting area Q1 in the first direction Y, increase the transmittance of the display panel 100, and increase the PPI of the display panel 100.

[0053] Fig.10 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.10 As shown, the vertical projection of the middle portion 1102 on the substrate 10 may also include a curve. To avoid affecting the reliability of the series connection when the distance between the first light-emitting element 1041 and the second light-emitting element 1042 is small, the shape of the middle portion 1102 is reasonably adjusted to ensure the connection effect between the first light-emitting element 1041 and the second light-emitting element 1042.

[0054] Fig.11 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.11 As shown, the middle electrode 110 extends along the second direction X; the first pole 105 of the first light emitting element 1041 points to the direction of the second pole 106 of the first light emitting element 1041, which intersects the second direction X. The first end 1101, the middle portion 1102, and the second end 1103 of the middle electrode 110 are collinearly arranged, and the vertical projection of the middle electrode 110 is in a straight line, which reduces the occupied space of the middle electrode 110 in the first direction Y, increases the area of ​​the light-transmitting region Q1 in the first direction Y, increases the light transmittance of the display panel 100, and increases the PPI of the display panel 100.

[0055] Continue to refer Figure 1 and Figure 4 , along the direction from the first pole 105 of the first light emitting element 1041 to the second pole 106 of the first light emitting element 1041, the second end 1103, the first end 1101 and the second electrode 103 are arranged in sequence. Figure 1 and Figure 4As shown, the first light-emitting element 1041 and the second light-emitting element 1042 are misaligned in the first direction Y. Along the first direction Y, the first end 1101 is located between the second end 1103 and the second electrode 103 of the second light-emitting element 1042. The vertical distance between the first end 1101 and the first auxiliary power line 111 is a first distance W1, the vertical distance between the second end 1103 and the first auxiliary power line 111 is a second distance W2, the vertical distance between the second electrode 103 and the first auxiliary power line 111 is a third distance W3, and the first distance W1 is between the second distance W2 and the third distance W3. The positional relationship between the first light-emitting element 1041, the second light-emitting element 1042 and the intermediate electrode 110 is adjusted to reduce the space occupied in the first direction Y, increase the area of ​​the light-transmitting area Q1 in the first direction Y, increase the transmittance of the display panel 100, and increase the PPI of the display panel 100.

[0056] refer to Figure 8 , the first light emitting element 1041 and the second light emitting element 1042 are arranged side by side along the second direction X, and the first pole 105 of the first light emitting element 1041 points to the direction of the second pole 106 of the first light emitting element 1041, crossing the second direction X. Along the second direction X, the first end 1101 and the second electrode 103 of the second light emitting element 1042 are arranged in a collinear manner, and the second end 1103 and the first electrode 102 of the first light emitting element 1041 are arranged in a collinear manner. Specifically, the vertical distance between the first end 1101 and the first auxiliary power line 111 is a first distance W1, and the vertical distance between the second electrode 103 and the first auxiliary power line 111 is a third distance W3, and the first distance W1 and the third distance W3 are equal, thereby reducing the space occupied in the first direction Y, increasing the area of ​​the light-transmitting area Q1 in the first direction Y, increasing the light transmittance of the display panel 100, and increasing the PPI of the display panel 100.

[0057] Fig.12 A schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 4 and Fig.12 As shown, along the direction from the first pole 105 of the first light emitting element 1041 to the second pole 106 of the first light emitting element 1041, the second end 1103, the second electrode 103 and the first end 1101 are arranged in sequence. Fig.12As shown, the second light-emitting element 1042 moves toward the side close to the first auxiliary power line 111, and the first light-emitting element 1041 and the second light-emitting element 1042 are misaligned in the first direction Y. Along the first direction Y, the second electrode 103 of the second light-emitting element 1042 is located between the first end 1101 and the second end 1103, the vertical distance between the first end 1101 and the first auxiliary power line 111 is the first distance W1, the vertical distance between the second end 1103 and the first auxiliary power line 111 is the second distance W2, and the vertical distance between the second electrode 103 of the second light-emitting element 1042 and the first auxiliary power line 111 is the third distance W3, which is between the first distance W1 and the second distance W2, thereby ensuring the connection effect of the first light-emitting element 1041 and the second light-emitting element 1042, reducing the space occupied in the first direction Y, increasing the area of ​​the light-transmitting area Q1 in the first direction Y, increasing the transmittance of the display panel 100, and increasing the PPI of the display panel 100.

[0058] Continue to refer Figure 2 The middle portion 1102 is disposed in the same layer as the first end portion 1101. The middle electrode 110, the first electrode 102 and the second electrode 103 are located in the same layer, which can reduce the film thickness of the display panel 100, reduce the process steps and reduce the manufacturing cost.

[0059] As another possible implementation, Fig.13 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, Fig.14 for Fig.13 Schematic diagram of the cross-section structure of the middle section line BB', refer to Fig.13 and Fig.14 As shown, the middle electrode 110 can be arranged in a cross-line configuration, the first end 1101 and the second end 1103 are located in the same metal layer and on the same side as the first electrode 102 and the second electrode 103, and in the direction Z perpendicular to the substrate 10, the film layer where the middle portion 1102 is located is located between the film layer where the first end 1101 is located and the substrate 10. Through the cross-line design, the space occupied by the middle electrode 110 in the second direction X is reduced, the area of ​​the light-transmitting region Q1 in the second direction X is increased, the light transmittance of the display panel 100 is increased, and the PPI of the display panel 100 is increased.

[0060] Continue to refer Fig.13 and Fig.14, the pixel driving circuit 108 is connected to the second electrode 103 and the second power line 1091 respectively, the second power line 1091 and the second auxiliary power line 112 are arranged in the same layer as the middle part 1102, and the third metal layer M3 is adopted. The first end 1101 and the second end 1103 of the middle electrode 110 are arranged in the same layer as the first power line 1071, and the fourth metal layer M4 is adopted. The film thickness of the display panel 100 is reduced, the process is reduced, and the manufacturing cost is reduced. The middle electrode 110 is designed to cross the line, reduce the space occupied by the middle electrode 110 in the second direction X, increase the area of ​​the light-transmitting area Q1 in the second direction X, increase the light transmittance of the display panel 100, and increase the PPI of the display panel 100.

[0061] Fig.15 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.15 As shown, the second auxiliary power line 112 is arranged in the same layer as the middle part 1102, the first auxiliary power line 111 is arranged in the same layer as the first end 1101 and the second end 1103 respectively, and the second auxiliary power line 112 is arranged in a different layer from the first auxiliary power line 111. In the direction Z perpendicular to the substrate 10, the first auxiliary power line 111 overlaps with the second auxiliary power line 112, which can further reduce the space occupied in the first direction Y, increase the area of ​​the light-transmitting area Q1 in the first direction Y, increase the light transmittance of the display panel 100, and increase the PPI of the display panel 100.

[0062] As shown in reference 7, along the first direction Y, the vertical projection of the first pole 105 of the first light-emitting element 1041 on the substrate 10 is located between the vertical projection of the second pole 106 of the first light-emitting element 1041 on the substrate 10 and the vertical projection of the first auxiliary power line 111 on the substrate 10. The vertical distance w1 between the first pole 105 of the first light-emitting element 1041 and the first auxiliary power line 111 is smaller than the vertical distance w2 between the second pole 106 of the first light-emitting element 1041 and the first auxiliary power line 111. The first pole 105 of the first light-emitting element 1041 is close to the first auxiliary power line 111, which facilitates the connection between the first pole 105 of the first light-emitting element 1041 and the first auxiliary power line 111, and reduces the difficulty of setting the first electrode 102. Since the first electrode 102 is directly electrically connected to the first power line 1071, it is not necessary to set the first electrode 102 on one side of the first light-emitting element 1041 along the second direction X. The common space occupied by the first light emitting element 1041 , the second light emitting element 1042 and the first electrode 102 in the second direction X is reduced, and the PPI of the display panel 100 in the second direction X is increased.

[0063] Fig.16 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.16As shown, along the first direction Y, the vertical projection of the second pole 106 of the first light-emitting element 1041 on the substrate 10 is located between the vertical projection of the first pole 105 of the first light-emitting element 1041 on the substrate 10 and the vertical projection of the first auxiliary power line 111 on the substrate 10. Along the second direction X, the first light-emitting element 1041 and the second light-emitting element 1042 are arranged side by side, and the vertical distance w2 between the second pole 106 of the first light-emitting element 1041 and the first auxiliary power line 111 is smaller than the vertical distance w1 between the first pole 105 of the first light-emitting element 1041 and the first auxiliary power line 111. The first pole 105 of the first light-emitting element 1041 is far away from the first auxiliary power line 111, and the first pole 105 of the first light-emitting element 1041 and the first auxiliary power line 111 need to be electrically connected to the first metal connection line 120, and the second pole 106 of the second light-emitting element 1042 needs to be electrically connected to the pixel driving circuit 108 by the second metal connection line 121. The space occupied in the first direction Y is increased, the space occupied in the second direction X is avoided, and the PPI of the display panel 100 in the second direction X is increased.

[0064] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.17As shown, the sub-pixel 101 includes a plurality of light-emitting element groups 113, and at least two light-emitting units in the same light-emitting element group 113 are connected in series and have the same light-emitting color. Light-emitting units in different light-emitting element groups 113 may have different light-emitting colors. Along the second direction X, two adjacent light-emitting element groups 113 are symmetrically arranged, i.e., mirror-arranged. Exemplarily, the sub-pixel 101 includes three light-emitting element groups 113, the three light-emitting element groups 113 include a first light-emitting element group 1131, a second light-emitting element group 1132, and a third light-emitting element group 1133, the first light-emitting element group 1131 and the second light-emitting element group 1132 are symmetrically arranged, the first light-emitting element group 1131 includes a first light-emitting element 1041 and a second light-emitting element 1042, the first light-emitting element 1041 and the second light-emitting element 1042 have a first light-emitting color; the second light-emitting element group 1132 includes a third light-emitting element 114 and a fourth light-emitting element 115 having a second light-emitting color, the first light-emitting color is different from the second light-emitting color; the first light-emitting element 1041 is adjacent to the third light-emitting element 114, and in a direction Z perpendicular to the substrate 10, the first pole 105 of the first light-emitting element 1041 and the first pole 105 of the third light-emitting element 114 are electrically connected to the same first electrode 102. Avoiding the space occupied by the first pole 105 and the first electrode 102 in the second direction X increases the PPI of the display panel 100 in the second direction X. The first pole 105 of the first light-emitting element 1041, the first pole 105 of the third electrode, the first electrode 102 and the first auxiliary power line 111 also include a first connecting line 118 extending along the first direction Y. The first pole 105 and the first electrode 102 are connected to the second auxiliary power line 112 via the first connecting line 118 to ensure that the first light-emitting element 1041 and the second light-emitting element 1042 receive the first power signal output by the first power line 1071.

[0065] Further, such as Fig.17 As shown, the third light-emitting element group 1133 includes a fifth light-emitting element 116 and a sixth light-emitting element 117 having a third light-emitting color, the first light-emitting color, the second light-emitting color and the third light-emitting color are all different, the first pole 105 of the fifth light-emitting element 116 is connected to the first electrode 102, and the first electrode 102 is connected to the first power line 1071 arranged in the same layer and extending along the first direction Y. Therefore, it is not necessary to connect the first electrode 102 to the first auxiliary power line 111 extending along the second direction X, which reduces the space occupied in the first direction Y and increases the PPI of the display panel 100 in the first direction Y.

[0066] refer to Figure 1 The first power line 1071 and the first auxiliary power line 111 are arranged in the same layer, thereby reducing the film thickness of the display panel 100, reducing the process steps, and reducing the manufacturing cost. Fig.18A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.18 As shown, in the direction Z perpendicular to the substrate 10, the film layer where the first auxiliary power line 111 is located is located between the film layer where the first power line 1071 is located and the substrate 10. The first auxiliary power line 111 and the first power line 1071 are arranged in different layers to reduce the impedance on the first auxiliary power line 111 and the first power line 1071, thereby ensuring the transmission effect of the first power signal. It can also save space in the first direction Y and increase the PPI of the display panel 100 in the first direction Y.

[0067] In addition, a first auxiliary power line 111 is arranged on the same layer as a second auxiliary power line 112 and a second power line 1091, and all adopt a third metal layer M3. The film thickness of the display panel 100 is reduced, the process is reduced, and the manufacturing cost is reduced. Furthermore, when the first light-emitting element 1041 and the second light-emitting element 1042 are arranged side by side, in a direction perpendicular to the substrate 10, the second pole 106 of the second light-emitting element 1042, the second electrode 103, and the first end 1101 of the intermediate electrode 110 overlap with the second auxiliary power line 112. The space in the first direction Y is reduced, the area of ​​the light-transmitting area Q1 in the first direction Y is increased, the light transmittance of the display panel 100 is increased, and the PPI of the display panel 100 is increased.

[0068] Fig.19 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.19 As shown, the second light-emitting element 1042 is moved toward the side close to the first auxiliary power line 111, so that in the first direction Y, the first light-emitting element 1041 and the second light-emitting element 1042 are misaligned, and in the direction Z perpendicular to the substrate 10, the second end 1103 of the intermediate electrode 110 and the first pole 105 of the second light-emitting element 1042 overlap with the first auxiliary power line 111, and the first pole 105 of the second light-emitting element 1042, the first electrode 102, and the first auxiliary power line 111 share the space in the first direction Y, thereby reducing the space occupied in the first direction Y and increasing the PPI of the display panel 100 in the first direction Y.

[0069] Fig. 20 A schematic diagram of a display device according to an embodiment of the present invention is shown in FIG. Fig. 20 As shown, the display device 200 includes the display panel 100 described in the above embodiment.

[0070] It should be noted that since the display device provided in this embodiment has the same or corresponding beneficial effects as the display panel 100 in the above embodiment, no further description is given here. The display device 200 provided in the embodiment of the present invention can be Fig. 20The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0071] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: A substrate and a plurality of sub-pixels located on one side of the substrate, wherein the sub-pixels include a first electrode, a second electrode and a light-emitting element; a first power source, electrically connected to the first electrode; At least one of the sub-pixels includes M light-emitting elements connected in series, where M is an integer, M≥2, and the M light-emitting elements include a first light-emitting element and a second light-emitting element; The light emitting element includes a first pole and a second pole, and the first pole of the first light emitting element points to a direction of the second pole of the first light emitting element, which is consistent with a direction in which the first pole of the second light emitting element points to the second pole of the second light emitting element.

2. The display panel according to claim 1, characterized in that: It also includes an intermediate electrode, through which the first light-emitting element and the second light-emitting element are connected; the first electrode and the second electrode are located on opposite sides of the intermediate electrode.

3. The display panel according to claim 1, characterized in that: Also includes an intermediate electrode, the first light emitting element and the second light emitting element are connected through the intermediate electrode; The intermediate electrode comprises a first end portion, a middle portion, and a second end portion, wherein the middle portion connects the first end portion and the second end portion; In a direction perpendicular to the substrate, the first end overlaps with and is electrically connected to the second pole of the first light-emitting element, and the second end overlaps with and is electrically connected to the first pole of the second light-emitting element; The first end portion, the second end portion, the first electrode and the second electrode are arranged in the same layer.

4. The display panel according to claim 3, characterized in that: The first power source includes a first power line extending along a first direction; The display panel further includes a first auxiliary power line extending along a second direction, wherein the first direction intersects with the second direction; Two adjacent first power lines are electrically connected through the first auxiliary power line.

5. The display panel according to claim 4, characterized in that: The first auxiliary power line is arranged at the same layer as the first end portion.

6. The display panel according to claim 5, characterized in that: The first auxiliary power line is multiplexed as the first electrode.

7. The display panel according to claim 3, characterized in that: The first pole of the first light emitting element points to the direction of the second pole of the first light emitting element, which intersects with the extending direction of the middle portion.

8. The display panel according to claim 3, characterized in that: The first pole of the first light emitting element points to a direction of the second pole of the first light emitting element, which is consistent with an extending direction of the middle portion.

9. The display panel according to claim 3, characterized in that: The middle portion comprises a curve in a perpendicular projection onto the substrate.

10. The display panel according to claim 3, characterized in that: Along a direction from the first pole of the first light-emitting element to the second pole of the first light-emitting element, the second end, the first end, and the second electrode are arranged in sequence.

11. The display panel according to claim 3, characterized in that: The intermediate electrode extends along a second direction; the first pole of the first light-emitting element points to a direction of a second pole of the first light-emitting element, intersecting the second direction.

12. The display panel according to claim 3, characterized in that: Along the second direction, the first end portion is collinearly arranged with the second electrode; the first pole of the first light-emitting element points to the direction of the second pole of the first light-emitting element, which intersects with the second direction.

13. The display panel according to claim 3, characterized in that: Along a direction from the first pole of the first light-emitting element to the second pole of the first light-emitting element, the second end, the second electrode and the first end are arranged in sequence.

14. The display panel according to claim 3, characterized in that: The middle portion is arranged at the same layer as the first end portion.

15. The display panel according to claim 3, characterized in that: In a direction perpendicular to the substrate, the film layer where the middle portion is located is located between the film layer where the first end portion is located and the substrate.

16. The display panel according to claim 15, characterized in that: Also includes a pixel driving circuit and a second power supply, wherein the pixel driving circuit is electrically connected to the second electrode and the second power supply; The middle portion is arranged on the same layer as the second power source.

17. The display panel according to claim 16, characterized in that: The first power source includes a first power line extending along a first direction; the display panel also includes a first auxiliary power line extending along a second direction, the first direction and the second direction intersect; two adjacent first power lines are electrically connected through the first auxiliary power line; The second power source includes a second power line extending along the first direction, and the display panel further includes a second auxiliary power line, the second power line extends in a direction from the first pole of the first light-emitting element to the second pole of the first light-emitting element, and the second auxiliary power line extends along the second direction; Two adjacent second power lines are electrically connected via the second auxiliary power line; The second auxiliary power line is arranged in the same layer as the middle portion and in a different layer from the first auxiliary power line; in a direction perpendicular to the substrate, the first auxiliary power line overlaps with the second auxiliary power line.

18. The display panel according to claim 4, characterized in that: Along the first direction, a vertical projection of the first pole of the first light-emitting element on the substrate is located between a vertical projection of the second pole of the first light-emitting element on the substrate and a vertical projection of the first auxiliary power line on the substrate.

19. The display panel according to claim 4, characterized in that: Along the first direction, a vertical projection of the second pole of the first light-emitting element on the substrate is located between a vertical projection of the first pole of the first light-emitting element on the substrate and a vertical projection of the first auxiliary power line on the substrate.

20. The display panel according to claim 19, characterized in that: The first light emitting element and the second light emitting element have a first light emitting color; the light emitting element further includes a third light emitting element having a second light emitting color, and the first light emitting color is different from the second light emitting color; In a direction perpendicular to the substrate, the first electrode of the first light-emitting element and the first electrode of the third light-emitting element are electrically connected to the same first electrode.

21. The display panel according to claim 4, characterized in that: The first power line and the first auxiliary power line are arranged in the same layer.

22. The display panel according to claim 4, characterized in that: In a direction perpendicular to the substrate, the film layer where the first auxiliary power line is located is located between the film layer where the first power line is located and the substrate.

23. The display panel according to claim 22, characterized in that: In a direction perpendicular to the substrate, a first electrode of the second light emitting element overlaps with the first auxiliary power line.

24. The display panel according to claim 1, characterized in that: In a direction perpendicular to the substrate, a first pole of the first light-emitting element overlaps with and is electrically connected to the first electrode, and a second pole of the second light-emitting element overlaps with and is electrically connected to the second electrode.

25. A display device, characterized in that: A display panel comprising any one of claims 1-24.

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