Display panel and repair method thereof, and display device

Abstract

The embodiment of the present invention discloses a display panel and a repair method thereof and a display device, wherein the display panel comprises: a plurality of sub-pixels located on a first substrate, the sub-pixels comprising a plurality of first sub-pixels and a plurality of second sub-pixels, the first sub-pixels comprising a first electrode and a light-emitting device bonded to the first electrode, and the second sub-pixels comprising a redundant electrode; a wire layer located between the first substrate and the plurality of sub-pixels, the wire layer comprising a plurality of first wires, and a redundant electrode corresponding to the M first electrodes through M first wires. In the embodiment of the present invention, the number of second sub-pixels is designed to be less than the number of first sub-pixels, and a second sub-pixel can be used as a substitute sub-pixel for more than three first sub-pixels, thereby reducing the area proportion of the second sub-pixels in the display area, increasing the design margin of the first sub-pixels, and increasing the actual use area in the display area, thereby increasing the resolution of the display panel and further improving the display effect.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a repair method thereof, and a display device. Background Art

[0002] In recent years, the display industry has developed rapidly, and with it comes fierce competition. Currently, display panels mainly include liquid crystal display panels and organic light-emitting display panels. With the maturity of panel technology, many new display panels have also emerged, such as micro-LED display panels.

[0003] Micro-LED display panels have the advantages of wide color gamut, high contrast, fast response speed, and long life, and are the most promising new display technology. However, there are also many problems, such as abnormalities that may occur during the transfer process of micro-LEDs, so abnormal LEDs need to be repaired.

[0004] Currently, sub-pixels in micro-LED display panels are designed with redundant electrodes, and new LEDs are transferred to the redundant electrodes to achieve the purpose of repair. However, this results in low resolution of micro-LED display panels. Summary of the invention

[0005] The embodiment of the present invention provides a display panel and a repair method thereof and a display device to solve the problem of low resolution of the existing display panel.

[0006] An embodiment of the present invention provides a display panel, including:

[0007] a first substrate;

[0008] A plurality of sub-pixels located on the first substrate, the plurality of sub-pixels comprising a plurality of first sub-pixels and a plurality of second sub-pixels, the first sub-pixels comprising a first electrode and a light-emitting device bonded to the first electrode, and the second sub-pixels comprising a redundant electrode;

[0009] A wire layer is located between the first substrate and the plurality of sub-pixels, the wire layer includes a plurality of first wires, one redundant electrode corresponds to M first electrodes respectively through M first wires, and M is greater than or equal to 3.

[0010] An embodiment of the present invention further provides a display device, comprising the display panel as described above.

[0011] An embodiment of the present invention further provides a method for repairing a display panel, wherein the display panel is the display panel described above, and the method comprises:

[0012] When it is detected that the first sub-pixel is disconnected, determining a first redundant electrode adjacent to the disconnected first sub-pixel;

[0013] If the first redundant electrode is not occupied, electrically connecting the first redundant electrode and the first electrode of the disconnected first sub-pixel through the first conductive wire;

[0014] If the first redundant electrode is occupied, a second redundant electrode adjacent to the disconnected first sub-pixel and not occupied is found, and the second redundant electrode and the first electrode of the disconnected first sub-pixel are electrically connected through the first conductive wire.

[0015] In an embodiment of the present invention, the number of second sub-pixels is designed to be less than that of first sub-pixels, and one second sub-pixel can serve as a substitute sub-pixel for more than three first sub-pixels. Then, the area ratio of the second sub-pixels in the display area of ​​the display panel is much smaller than the area ratio of the first sub-pixels, thereby reducing the area ratio of the second sub-pixels in the display area and improving the design margin of the first sub-pixels, thereby increasing the actual usable area in the display area, thereby improving the resolution of the display panel and further improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, although the drawings described below are some specific embodiments of the present invention, for those skilled in the art, the basic concepts of the device structure, driving method and manufacturing method disclosed and suggested by the various embodiments of the present invention can be expanded and extended to other structures and drawings, and there is no doubt that these should be within the scope of the claims of the present invention.

[0017] Figure 1 is a schematic diagram of a display panel provided by an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A cross-sectional view along A-A';

[0019] Figure 3 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Cross-sectional view along B-B';

[0021] Figure 5 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0024] Figure 8 yes Figure 7 Sectional view along C-C';

[0025] Fig. 9 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0026] Fig.10 yes Fig. 9 Sectional view along D-D';

[0027] Fig.11 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0028] Fig.12 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0029] Fig.13 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0030] Fig.14 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0031] Fig.15 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0032] Fig.16 yes Fig.15 Sectional view along E-E';

[0033] Fig.17 yes Fig.15 Another cross-sectional view along E-E';

[0034] Fig.18 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0035] Fig.19 It is a schematic diagram of a display panel repair method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described through implementation methods with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the basic concepts disclosed and suggested by the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

[0037] refer to Figure 1 FIG. 1 is a schematic diagram of a display panel provided by an embodiment of the present invention. Figure 2 yes Figure 1 Cross-sectional view along A-A'. In this embodiment, the display panel includes: a first substrate 10; a plurality of sub-pixels 20 located on the first substrate 10, the plurality of sub-pixels 20 including a plurality of first sub-pixels 21 and a plurality of second sub-pixels 22, the first sub-pixel 21 including a first electrode 211 and a light-emitting device 212 bonded to the first electrode 211, and the second sub-pixel 22 including a redundant electrode 221; a wire layer 30 located between the first substrate 10 and the plurality of sub-pixels 20, the wire layer 30 including a plurality of first wires 31, and one redundant electrode 221 corresponding to M first electrodes 211 respectively through M first wires 31, where M is greater than or equal to 3.

[0038] The optional display panel is a light emitting diode display panel, which may be a micro light emitting diode display panel, or the light emitting diode display panel may be a nanometer unit size light emitting diode display panel, but is not limited thereto. It should be noted that the redundant electrode 221 and the first electrode 211 are located in the same layer and may be made of the same material, and the redundant electrode 221 and the first electrode 211 in the figure use different filling patterns only to indicate that the two are electrodes with different functions, and do not refer to different layers or different materials.

[0039] In this embodiment, the first substrate 10 includes a pixel driving circuit, and a plurality of sub-pixels 20 are arranged on the first substrate 10, and the pixel driving circuit drives each sub-pixel 20 to display. The optional pixel driving circuit includes a plurality of pixel circuits, and the pixel circuits are arranged and electrically connected to the sub-pixels 20 in a one-to-one correspondence, wherein the pixel driving circuit controls the corresponding sub-pixel 20 to display through the pixel circuit. The structure of the pixel driving circuit and the process of driving the sub-pixels are not specifically described here, and any pixel driving circuit applicable to the light-emitting diode display panel falls within the protection scope of the present invention.

[0040] A plurality of sub-pixels 20 are arranged on the first substrate 10, and the plurality of sub-pixels 20 are divided into a first sub-pixel 21 and a second sub-pixel 22. The first sub-pixel 21 includes a first electrode 211 and a light-emitting device 212 bonded to the first electrode 211, and the second sub-pixel 22 includes a redundant electrode 221, wherein the second sub-pixel 22 is a substitute sub-pixel. When the first sub-pixel 21 displays normally, the second sub-pixel 22 is actually not used. If one or more first sub-pixels 21 are defective or their light-emitting devices 212 are transferred abnormally, then such first sub-pixels 21 cannot display normally. At this time, a new light-emitting device is transferred to the second sub-pixel 22 electrically connected to the abnormal first sub-pixel 21, and the second sub-pixel 22 can replace the abnormal first sub-pixel 21 for normal display, thereby achieving the purpose of repairing the abnormal first sub-pixel 21 and ensuring the display effect of the display panel.

[0041] A wire layer 30 is disposed between the first substrate 10 and the plurality of sub-pixels 20, and the wire layer 30 includes a plurality of first wires 31, and one redundant electrode 221 corresponds to M first electrodes 211 through M first wires 31, where M is greater than or equal to 3. In this embodiment, the number of second sub-pixels 22 is less than that of first sub-pixels 21, and assuming that M=3, one second sub-pixel 22 can serve as a substitute sub-pixel for three first sub-pixels 21, and then the redundant electrode 221 of the second sub-pixel 22 is connected to the first electrodes 211 of the corresponding M first sub-pixels 21 through the M first wires 31.

[0042] With the advancement of the manufacturing process of display panels, the defective rate of the first sub-pixel in the display area or the abnormal transfer of its light-emitting device has decreased. When the yield of the first sub-pixel is improved, a large number of substitute sub-pixels are actually not used. At this time, if the proportion of substitute sub-pixels in the display area is too large, it will cause the actual use area in the display area of ​​the display panel to be small and the resolution to be low. Based on this, in this embodiment, the number of second sub-pixels 22 is designed to be less than that of the first sub-pixels 21, and one second sub-pixel 22 can be used as a substitute sub-pixel for more than three first sub-pixels 21. Then, the area proportion of the second sub-pixel 22 in the display area of ​​the display panel is much smaller than the area proportion of the first sub-pixel 21, which reduces the area proportion of the second sub-pixel 22 in the display area, increases the design margin of the first sub-pixel 21, and increases the actual use area in the display area, which can improve the resolution of the display panel and thus improve the display effect.

[0043] like Figure 1 As shown, an exemplary second sub-pixel 22 corresponds to three first sub-pixels 21 on the left, and the redundant electrode 221 of the second sub-pixel 22 is connected to the first electrodes 211 of the corresponding three first sub-pixels 21 through three first wires 31 . Figure 1The first end of the first wire 31 is electrically connected to the first electrode 211 of the corresponding first sub-pixel 21 through the through hole, and the second end of the first wire 31 is electrically connected to the redundant electrode 221 of the corresponding second sub-pixel 22 through the through hole. The first wire 31 is in a disconnected state in the original state, that is, the first end and the second end of the first wire 31 are not electrically connected in the original state. When the first sub-pixel 21 is displayed normally, the second sub-pixel 22 does not need to be repaired, so the first wire 31 between the second sub-pixel 22 and the normally displayed first sub-pixel 21 is in a disconnected state.

[0044] refer to Figure 3 FIG. 1 is a schematic diagram of another display panel provided by an embodiment of the present invention. Figure 4 yes Figure 3 Cross-sectional view along B-B'. Figure 3 and Figure 4 As shown, if the first sub-pixel 21a is defective or its light-emitting device 212 is abnormally transferred, the unused second sub-pixel 22a is selected to repair the first sub-pixel 21a. Specifically, the abnormal light-emitting device 212 in the first sub-pixel 21a is removed; a new light-emitting device 222 is transferred to the redundant electrode 221 of the second sub-pixel 22a; and finally, the first wire 31 between the redundant electrode 221 of the second sub-pixel 22a and the first electrode 211 of the first sub-pixel 21a is repaired to be electrically conductive. In this way, the redundant electrode 221 of the second sub-pixel 22a and the first electrode 211 of the first sub-pixel 21a are electrically connected through the first wire 31, and the second sub-pixel 22a replaces the abnormal first sub-pixel 21a for display, thereby repairing the abnormal sub-pixel and improving the display effect of the display panel.

[0045] In an embodiment of the present invention, the number of second sub-pixels is designed to be less than that of first sub-pixels, and one second sub-pixel can serve as a substitute sub-pixel for more than three first sub-pixels. Then, the area ratio of the second sub-pixels in the display area of ​​the display panel is much smaller than the area ratio of the first sub-pixels, thereby reducing the area ratio of the second sub-pixels in the display area and improving the design margin of the first sub-pixels, thereby increasing the actual usable area in the display area, thereby improving the resolution of the display panel and further improving the display effect.

[0046] A plurality of sub-pixels may be selected to form a plurality of pixel units arranged in an array; the pixel unit includes three first sub-pixels and one second sub-pixel. In the optional pixel unit, the three first sub-pixels emit red light, green light and blue light respectively.

[0047] refer to Figure 5 As shown in FIG. 1 , it is a schematic diagram of another display panel provided by an embodiment of the present invention. Figure 5As shown, the display area of ​​the display panel includes a plurality of pixel units 1 arranged in an array, and the pixel unit 1 includes 4 sub-pixels, and the four sub-pixels include three first sub-pixels 21 and one second sub-pixel 22. In the pixel unit 1, the second sub-pixel 22 is a substitute sub-pixel for the three first sub-pixels 21, and can be used as a substitute sub-pixel to replace the abnormal first sub-pixel 21 when the first sub-pixel 21 is abnormal. Specifically, in the pixel unit 1, the redundant electrode of the second sub-pixel 22 corresponds to the first electrodes of the three first sub-pixels 21 through three first wires; when there is an abnormal first sub-pixel 21, the first wire line connected to the abnormal first sub-pixel 21 is turned on, and the redundant electrode of the second sub-pixel 22 is electrically connected to the first electrode of the abnormal first sub-pixel 21 through the first wire; a new light-emitting device is transferred to the redundant electrode of the second sub-pixel 22, and the light-emitting device of the first sub-pixel 21 is removed, then the second sub-pixel 22 replaces the abnormal first sub-pixel 21 for normal display, and the abnormal first sub-pixel 21 is removed.

[0048] With the advancement of display panel manufacturing technology, the manufacturing yield of the first sub-pixel 21 has been greatly improved, and the probability of two or more abnormal first sub-pixels 21 appearing simultaneously in a pixel unit 1 is extremely small. Therefore, a second sub-pixel 22 is designed in the pixel unit 1 as a substitute sub-pixel for the three first sub-pixels 21 to meet the repair requirements of the three first sub-pixels 21 in the pixel unit. According to this structural design, the display area occupied by the second sub-pixel 22 can be reduced, the display area occupied by the first sub-pixel 21 can be increased, and the resolution of the display panel can be improved.

[0049] In the pixel unit 1, the three first sub-pixels 21 include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, and the three first sub-pixels 21 in the pixel unit 1 can be arranged in the color order of RGB. However, the number of first sub-pixels and the color arrangement order in the pixel unit are not limited thereto, and relevant practitioners can reasonably design the number of first sub-pixels and the color arrangement order in the pixel unit according to product requirements. For example, the optional pixel unit includes 4 first sub-pixels, and the 4 first sub-pixels include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a yellow sub-pixel Y, and the color arrangement order is GBWR.

[0050] The four sub-pixels in the optional pixel unit 1 are arranged sequentially along the row direction. The three first sub-pixels 21 in the optional pixel unit 1 are arranged adjacent to each other.

[0051] like Figure 5 As shown, the sub-pixels in the optional pixel unit 1 are arranged in sequence along the row direction, and the sub-pixels in the display area are arranged in an array. In the optional pixel unit 1, three first sub-pixels 21 are arranged adjacent to each other, and the second sub-pixel 22 can be arranged at the end of the pixel unit 1; or Figure 6As shown, in the optional pixel unit 1 , three first sub-pixels 21 are arranged adjacent to each other, and the second sub-pixel 22 can be arranged at the head of the pixel unit 1 .

[0052] It is understood that the arrangement of the first sub-pixel 21 and the second sub-pixel 22 in the pixel unit 1 along the row direction is not limited to that shown in the figure. In other embodiments, the second sub-pixel in the pixel unit can be located between the three first sub-pixels, but is not limited thereto.

[0053] Optionally, along the row direction, the first electrode corresponds to two redundant electrodes on both sides through two first wires.

[0054] refer to Figure 7 FIG. 1 is a schematic diagram of another display panel provided by an embodiment of the present invention. Figure 8 yes Figure 7 Cross-sectional view along C-C'. In this embodiment, the pixel units of the display area are arranged in an array, and the four sub-pixels 20 in the pixel units are arranged sequentially along the row direction, so along the row direction, a plurality of first sub-pixels 21 are arranged between two adjacent second sub-pixels 22, and for any one of the first sub-pixels 21, the first electrode 211 of the first sub-pixel 21 can correspond to the redundant electrodes 221 of the two second sub-pixels 22 on both sides through the two first conductive wires 31, so that one first sub-pixel 21 corresponds to two substitute second sub-pixels 22.

[0055] and Figure 1 Compared with the one first sub-pixel 21 corresponding to one substitute second sub-pixel 22 in the pixel unit, in this embodiment, two second sub-pixels 22 are designed as substitute sub-pixels for the three first sub-pixels 21 in the pixel unit, and one first sub-pixel 21 corresponds to two substitute second sub-pixels 22. Then, the substitute sub-pixel for the abnormal first sub-pixel 21 is optional, which can not only meet the repair requirements of one abnormal first sub-pixel 21 in the pixel unit, but also further meet the repair requirements of two abnormal first sub-pixels 21 in the pixel unit at the same time. On the basis of reducing the display area occupied by the second sub-pixel 22, the display effect is also improved.

[0056] like Figure 7 and Figure 8 As shown, an exemplary second sub-pixel 22 corresponds to a total of six first sub-pixels 21 on the left and right sides, so the redundant electrode 221 of the second sub-pixel 22 is respectively connected to the first electrodes 211 of the corresponding six first sub-pixels 21 through six first wires 31. Correspondingly, the first electrode 211 of the first sub-pixel 21 is respectively connected to the redundant electrodes 221 of the corresponding two second sub-pixels 22 through two first wires 31. When the first sub-pixel 21 is normally displayed and the second sub-pixel 22 is not used, the first wire 31 between the second sub-pixel 22 and the normally displayed first sub-pixel 21 is in a disconnected state.

[0057] refer to Fig. 9 FIG. 1 is a schematic diagram of another display panel provided by an embodiment of the present invention. Fig.10 yes Fig. 9 Cross-sectional view along D-D'. Fig. 9 and Fig.10 As shown, if the first sub-pixel 21a is defective or its light-emitting device 212 is abnormally transferred, the unused second sub-pixel 22a is selected to repair the first sub-pixel 21a. Specifically, the abnormal light-emitting device 212 in the first sub-pixel 21a is removed; a new light-emitting device 222 is transferred to the redundant electrode 221 of the second sub-pixel 22a; and finally, the first wire 31 between the redundant electrode 221 of the second sub-pixel 22a and the first electrode 211 of the first sub-pixel 21a is repaired to be electrically conductive. In this way, the redundant electrode 221 of the second sub-pixel 22a and the first electrode 211 of the first sub-pixel 21a are electrically connected through the first wire 31, and the second sub-pixel 22a replaces the abnormal first sub-pixel 21a for display, thereby repairing the abnormal sub-pixel and improving the display effect of the display panel.

[0058] Furthermore, if a display abnormality occurs in a first sub-pixel 21b and a corresponding second sub-pixel 22a has been used to repair other first sub-pixels, when it is determined that another corresponding second sub-pixel 22b is not used, the second sub-pixel 22b can be used to repair the first sub-pixel 21b.

[0059] A plurality of optional sub-pixels constitute a plurality of pixel units arranged in an array; the pixel unit comprises three first sub-pixels and one second sub-pixel. In the optional pixel unit, the three first sub-pixels emit red light, green light and blue light respectively. The centers of the four sub-pixels in the optional pixel unit constitute a first virtual quadrilateral. The four sub-pixels in the optional pixel unit are distributed in two adjacent rows.

[0060] refer to Fig.11 As shown in FIG. 1 , it is a schematic diagram of another display panel provided by an embodiment of the present invention. Fig.11 As shown, the pixel units 1 in the optional display panel are arranged in an array, and the pixel unit 1 includes a second sub-pixel 22 and three first sub-pixels 21, and the second sub-pixel 22 can be used as a substitute sub-pixel for the three first sub-pixels 21. Specifically, in the pixel unit 1, the redundant electrode of the second sub-pixel 22 corresponds to one first sub-pixel 21 through a first wire 31.

[0061] like Fig.11As shown, the centers of the four sub-pixels in the optional pixel unit 1 constitute a first virtual quadrilateral. Specifically, the geometric centers of the four sub-pixels in the pixel unit 1 are sequentially connected to form a first virtual quadrilateral. The first virtual quadrilateral can be a regular shape or an irregular shape, and the shape of the virtual quadrilateral is not specifically limited. The arrangement position of the second sub-pixel 22 and the three first sub-pixels 21 in the pixel unit 1 facilitates the design of the first wire 31. For example, the first wire 31 between the second sub-pixel 22 and the first sub-pixel 21 is arranged in a straight line, wherein the first wire 31R is arranged between the second sub-pixel 22 and the first sub-pixel 21 / R, the first wire 31G is arranged between the second sub-pixel 22 and the first sub-pixel 21 / G, and the first wire 31B is arranged between the second sub-pixel 22 and the first sub-pixel 21 / B. The four sub-pixels in the optional pixel unit 1 are distributed in two adjacent rows, which can reduce the difficulty of process manufacturing, and the number of sub-pixels in a column can be increased in the column direction to improve the resolution. It can be understood that the number of sub-pixels in the pixel unit and the arrangement of the sub-pixels are not limited to those shown in the figure.

[0062] The first virtual quadrilateral may be a parallelogram. One second sub-pixel may be arranged adjacent to six first sub-pixels, and the six first sub-pixels are distributed in adjacent 2*2 pixel units; the redundant electrodes of the second sub-pixel correspond to the six first sub-pixels through six first wires.

[0063] refer to Fig.12 As shown in FIG. 1 , it is a schematic diagram of another display panel provided by an embodiment of the present invention. Fig.12 As shown, the first virtual quadrilateral can be a parallelogram, so a second sub-pixel 22 is not only arranged adjacent to the three first sub-pixels 21 of the pixel unit 1 where it is located, but also arranged adjacent to the first sub-pixels 21 of the three adjacent pixel units 1. Based on this, the redundant electrodes of the second sub-pixel 22 correspond to the six first sub-pixels 21 through the six first wires 31.

[0064] Specifically, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 / G in the pixel unit 1 via the first wire 311, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 / R ​​in the pixel unit 1 via the first wire 312, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 / B in the pixel unit 1 via the first wire 313, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the column direction via the first wire 314, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the diagonal direction via the first wire 315, and the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the row direction via the first wire 316.

[0065] As described above, one first sub-pixel 21 is connected to two substitute second sub-pixels 22, one of which is located in the same pixel unit 1 as the first sub-pixel 21, and the other second sub-pixel 22 is located in a different pixel unit 1 from the first sub-pixel 21. Then, the substitute sub-pixel of the abnormal first sub-pixel 21 is optional, which can further meet the repair requirements of two abnormal first sub-pixels 21 appearing simultaneously in the pixel unit. On the basis of reducing the display area occupied by the second sub-pixel 22, the display effect is also improved.

[0066] The first virtual quadrilateral may be a rectangle. One second sub-pixel may be arranged adjacent to eight first sub-pixels, and the eight first sub-pixels are distributed in adjacent 2*2 pixel units; and the redundant electrodes of the second sub-pixel correspond to the eight first sub-pixels through eight first wires.

[0067] refer to Fig.13 As shown in FIG. 1 , it is a schematic diagram of another display panel provided by an embodiment of the present invention. Fig.13 As shown, the first virtual quadrilateral can be a rectangle, so a second sub-pixel 22 is not only arranged adjacent to the three first sub-pixels 21 of the pixel unit 1 where it is located, but also arranged adjacent to the first sub-pixels 21 of the three adjacent pixel units 1. Based on this, the redundant electrodes of the second sub-pixel 22 correspond to the eight first sub-pixels 21 through the eight first wires 31. Specifically, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 / G in the pixel unit 1 via the first wire 311, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 / R ​​in the pixel unit 1 via the first wire 312, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 / B in the pixel unit 1 via the first wire 313, the redundant electrode of the second sub-pixel 22 is connected to the two first sub-pixels 21 in the adjacent pixel units 1 in the column direction via the first wires 314 and 315, the redundant electrode of the second sub-pixel 22 is connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the diagonal direction via the first wire 316, and the redundant electrode of the second sub-pixel 22 is connected to the two first sub-pixels 21 in the adjacent pixel units 1 in the row direction via the first wires 317 and 318.

[0068] As described above, one first sub-pixel 21 is connected to two substitute second sub-pixels 22, one of which is located in the same pixel unit 1 as the first sub-pixel 21, and the other second sub-pixel 22 is located in a different pixel unit 1 from the first sub-pixel 21. Then, the substitute sub-pixel of the abnormal first sub-pixel 21 is optional, which can further meet the repair requirements of two abnormal first sub-pixels 21 appearing simultaneously in the pixel unit. On the basis of reducing the display area occupied by the second sub-pixel 22, the display effect is also improved.

[0069] Those skilled in the art will appreciate that, according to different pixel arrangements, the wiring patterns of the redundant electrodes and the first electrodes may be reasonably adjusted to achieve a situation where one redundant electrode of a second sub-pixel corresponds to the first electrodes of multiple first sub-pixels to be repaired. Fig.14 A schematic diagram of another display panel provided by an embodiment of the present invention is shown as follows: Fig.14 As shown, the optional spacing between the second sub-pixel 22 and the corresponding six repaired first sub-pixels 21 can be equal. Then, after the second sub-pixel 22 repairs the abnormal first sub-pixel 21, the light-emitting position is changed from the first sub-pixel 21 to the second sub-pixel 22. The spacing between the second sub-pixel 22 and the corresponding six repaired first sub-pixels 21 can be equal, which can reduce the spacing difference of the light-emitting position change, thereby reducing the impact on the visual effect. In addition, as Fig.14 The first conductive line 31 between the second sub-pixel 22 and the first sub-pixel 21 may extend in a row direction or a column direction without any specific limitation.

[0070] refer to Fig.15 FIG. 1 is a schematic diagram of another display panel provided by an embodiment of the present invention. Fig.16 yes Fig.15 Sectional view along E-E'. Fig.15 and Fig.16 As shown, the optional first conductive line 31 includes a disconnected first branch line 31a and a disconnected second branch line 31b and an electrical connection structure 31c located between the first branch line 31a and the second branch line 31b; the first branch line 31a is electrically connected to the redundant electrode 221, the second branch line 31b is electrically connected to the first electrode 211, and the electrical connection structure 31c is used to selectively conduct the first branch line 31a and the second branch line 31b. Fig.17 yes Fig.15 In another cross-sectional view along line EE', the light-emitting device 212 bonded to the optional first electrode 211 is disconnected, and the first branch line 31a and the second branch line 31b in the first wire 31 are electrically connected via the electrical connection structure 31c. It can be understood that each first wire 31 includes the electrical connection structure 31c, and only the electrical connection structure 31c of one of the first wires 31 and its on-off state are shown here.

[0071] In this embodiment, the first conductive line 31 includes a disconnected first branch line 31a and a second branch line 31b, and the first conductive line 31 also includes an electrical connection structure 31c located between the first branch line 31a and the second branch line 31b. For the first conductive line 31, the first branch line 31a and the second branch line 31b are located in the same layer, and the electrical connection structure 31c and the first branch line 31a are located in different layers. In the direction perpendicular to the display panel, the electrical connection structure 31c in the first conductive line 31 overlaps with the first branch line 31a, and the electrical connection structure 31c overlaps with the second branch line 31b.

[0072] The electrical connection structure 31c can be melted by laser. Fig.16 As shown, in the original state, the electrical connection structure 31c is insulated and overlapped with the first branch line 31a and the second branch line 31b respectively, so the first wire 31 remains disconnected, and the first sub-pixel 21 and the second sub-pixel 22 connected by the first wire 31 remain disconnected. Fig.17 As shown, after the laser melting of the electrical connection structure 31c, the electrical connection structure 31c is electrically connected to the first branch line 31a and the second branch line 31b respectively, then the electrical connection structure 31c conducts the first branch line 31a and the second branch line 31b, so that the first wire 31 is electrically conductive, and then the first sub-pixel 21a and the second sub-pixel 22a connected by the first wire 31 are conductive, and at this time, the second sub-pixel 22a replaces the first sub-pixel 21a for display.

[0073] When the second sub-pixel 22 is not in use, the M first conductive wires 31 corresponding to the second sub-pixel 22 are all kept disconnected. When the light-emitting device 212 bonded to the first electrode 211 in the first sub-pixel 21a is disconnected, the second sub-pixel 22a needs to replace the defective first sub-pixel 21a, then the first conductive wire 31 between the second sub-pixel 22a and the repaired first sub-pixel 21a is controlled to achieve electrical conduction, the first conductive wire 31 between the second sub-pixel 22a and other corresponding first sub-pixels 21 is kept disconnected, and then a new light-emitting device 222 is transferred to the redundant electrode 221 of the second sub-pixel 22a, then the second sub-pixel 22a replaces the first sub-pixel 21a for display.

[0074] refer to Fig.18 As shown, it is a schematic diagram of another display panel provided by an embodiment of the present invention, such as Fig.18 As shown, the optional sub-pixel 20 further includes a second electrode 23; the first electrode 211 and the redundant electrode 221 are anodes, and the second electrode 23 is a cathode; or the first electrode 211 and the redundant electrode 221 are cathodes, and the second electrode 23 is an anode. In this embodiment, the first sub-pixel 20 includes a first electrode 211 and a second electrode 23 and a light-emitting device 212 bonded between the first electrode 211 and the second electrode 23. The pixel driving circuit provides different electrical signals to the first electrode 211 and the second electrode 23 through the pixel circuit, and the current flows through the light-emitting device 212 to make the light-emitting device 212 emit light. The light-emitting principle of the sub-pixel 20 is not described in detail here.

[0075] The first electrode 211 and the second electrode 23 may be disposed in the same layer. The first electrode 211 and the second electrode 23 of the sub-pixel 20 may be disposed on the same side of the light-emitting device 212. In other embodiments, the first electrode and the second electrode of the sub-pixel may be disposed on different sides of the light-emitting device. The structure of the sub-pixel is not specifically limited herein.

[0076] like Fig.18 As shown, the second electrodes 23 of a row of sub-pixels 20 may be electrically connected. In this embodiment, the second electrodes 23 of a row of sub-pixels 20 are electrically connected, so the pixel driving circuit provides the same electrical signal to the second electrodes 23 of a row of sub-pixels 20. When controlling the sub-pixels 20 to display, the sub-pixels 20 may be controlled to emit light by providing corresponding electrical signals to the first electrodes 211 of the corresponding sub-pixels 20.

[0077] Based on the same inventive concept, an embodiment of the present invention further provides a display device, which includes the display panel as described above. The display device includes the display panel and other components and film layers for the display panel to work. For example, the display device also includes a power structure such as a mainboard to drive the display panel to work normally. The display device can be a micro light emitting diode display device, but is not limited thereto.

[0078] An embodiment of the present invention further provides a method for repairing a display panel, wherein the display panel is the display panel described in any of the above embodiments. Fig.19 FIG. 1 is a schematic diagram of a method for repairing a display panel provided by an embodiment of the present invention, as shown in FIG. Fig.19 As shown, the repair method includes:

[0079] Step S100, when a first sub-pixel is detected to be disconnected, determining a first redundant electrode adjacent to the disconnected first sub-pixel;

[0080] Step S110: If the first redundant electrode is not occupied, electrically connect the first redundant electrode and disconnect the first electrode of the first sub-pixel through the first conductive wire;

[0081] Step S120: If the first redundant electrode is occupied, find a second redundant electrode that is adjacent to the disconnected first sub-pixel and is not occupied, and electrically connect the second redundant electrode and the first electrode of the disconnected first sub-pixel through a first conductive wire.

[0082] Optionally, a length of a first wire connecting the first redundant electrode and the first electrode may be less than or equal to a length of a first wire connecting the second redundant electrode and the first electrode.

[0083] The optional first conductive line includes a disconnected first branch line and a second branch line and an electrical connection structure located between the first branch line and the second branch line, wherein the first branch line is electrically connected to a redundant electrode, and the second branch line is electrically connected to the first electrode; electrically connecting the first redundant electrode and disconnecting the first electrode of the first sub-pixel through the first conductive line includes: laser melting the electrical connection structure to connect the first branch line and the second branch line through the electrical connection structure.

[0084] In the pixel unit, one first sub-pixel corresponds to at least two second sub-pixels. The repair process for the abnormal first sub-pixel is as follows: first determine and detect a second sub-pixel that is the closest neighbor to the abnormal first sub-pixel; if it is detected that the second sub-pixel is occupied, that is, it has been used to repair other first sub-pixels, then find other second sub-pixels that are connected to the disconnected first sub-pixel and are not occupied; after finding the target second sub-pixel, control the first wire between the second redundant electrode of the target second sub-pixel and the first electrode of the disconnected first sub-pixel to be electrically connected, so that the target second sub-pixel repairs the disconnected first sub-pixel.

[0085] The first conductive line can be electrically conductive by printing silver paste.

[0086] In this embodiment, the redundant electrode of a second sub-pixel corresponds to the first electrodes of M first sub-pixels through M first wires, where M is greater than or equal to 3. Based on this, a smaller number of second sub-pixels can be used to repair and replace more first sub-pixels. At present, the yield rate of the first sub-pixels has been greatly improved, and the probability of more than two abnormal first sub-pixels appearing in a pixel unit at the same time is very small. Therefore, designing a smaller number of second sub-pixels can meet the demand, which not only reduces the area occupied by the redundant electrodes in the display area, but also improves the resolution of the display panel.

[0087] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: a first substrate; A plurality of sub-pixels located on the first substrate, the plurality of sub-pixels comprising a plurality of first sub-pixels and a plurality of second sub-pixels, the first sub-pixels comprising a first electrode and a light-emitting device bonded to the first electrode, and the second sub-pixels comprising a redundant electrode; A wire layer located between the first substrate and the plurality of sub-pixels, the wire layer comprising a plurality of first wires, one of the redundant electrodes corresponding to M first electrodes through M first wires, M being greater than or equal to 3; The conductive line layer is in a different layer from the first electrode and the conductive line layer is in a different layer from the redundant electrode; The first conductive line includes a first branch line and a second branch line and an electrical connection structure between the first branch line and the second branch line; The first branch line is electrically connected to the redundant electrode, the second branch line is electrically connected to the first electrode, and the electrical connection structure is used to selectively conduct the first branch line and the second branch line.

2. The display panel according to claim 1, characterized in that: The plurality of sub-pixels constitute a plurality of pixel units arranged in an array; The pixel unit includes three first sub-pixels and one second sub-pixel.

3. The display panel according to claim 2, characterized in that: In the pixel unit, the three first sub-pixels emit red light, green light and blue light respectively.

4. The display panel according to claim 2, characterized in that: The four sub-pixels in the pixel unit are arranged sequentially along a row direction.

5. The display panel according to claim 4, characterized in that: Three first sub-pixels are adjacently arranged in the pixel unit.

6. The display panel according to claim 4, characterized in that: Along the row direction, the first electrode is connected to two redundant electrodes on both sides through two first conductive lines.

7. The display panel according to claim 2, characterized in that: The centers of the four sub-pixels in the pixel unit form a first virtual quadrilateral.

8. The display panel according to claim 7, characterized in that: The four sub-pixels in the pixel unit are distributed in two adjacent rows.

9. The display panel according to claim 7, characterized in that: The first virtual quadrilateral is a parallelogram.

10. The display panel according to claim 9, characterized in that: One of the second sub-pixels is disposed adjacent to six of the first sub-pixels, respectively, and the six first sub-pixels are distributed in adjacent 2*2 pixel units; The redundant electrodes of the second sub-pixels correspond to the six first sub-pixels respectively through the six first wires.

11. The display panel according to claim 7, characterized in that: The first virtual quadrilateral is a rectangle.

12. The display panel according to claim 11, characterized in that: One of the second sub-pixels is disposed adjacent to eight of the first sub-pixels, respectively, and the eight first sub-pixels are distributed in adjacent 2*2 pixel units; The redundant electrodes of the second sub-pixels correspond to the eight first sub-pixels respectively through the eight first wires.

13. The display panel according to claim 1, characterized in that: The light emitting device bonded to the first electrode is disconnected, and the first branch line and the second branch line in the first wire are electrically connected through the electrical connection structure.

14. The display panel according to claim 1, characterized in that: The sub-pixel further includes a second electrode; The first electrode and the redundant electrode are anodes, and the second electrode is a cathode; or, The first electrode and the redundant electrode are cathodes, and the second electrode is an anode.

15. The display panel according to claim 14, characterized in that: The first electrode and the second electrode are arranged in the same layer.

16. The display panel according to claim 14, characterized in that: In a row of sub-pixels, the second electrodes are electrically connected.

17. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-16.

18. A method for repairing a display panel, characterized in that: The display panel is a display panel according to any one of claims 1 to 16, and the repair method comprises: When it is detected that the first sub-pixel is disconnected, determining a first redundant electrode adjacent to the disconnected first sub-pixel; If the first redundant electrode is not occupied, electrically connecting the first redundant electrode and the first electrode of the disconnected first sub-pixel through the first conductive wire; If the first redundant electrode is occupied, a second redundant electrode adjacent to the disconnected first sub-pixel and not occupied is found, and the second redundant electrode and the first electrode of the disconnected first sub-pixel are electrically connected through the first conductive wire.

19. The repair method according to claim 18, characterized in that: A length of a first wire connecting the first redundant electrode and the first electrode is less than or equal to a length of a first wire connecting the second redundant electrode and the first electrode.

20. The repair method according to claim 18, characterized in that: The first conductive line includes a disconnected first branch line and a second branch line and an electrical connection structure between the first branch line and the second branch line, the first branch line is electrically connected to the redundant electrode, and the second branch line is electrically connected to the first electrode; Electrically conducting the first redundant electrode and the first electrode of the disconnected first sub-pixel through the first conductive line comprises: The electrical connection structure is melted by laser so that the first branch line and the second branch line are connected through the electrical connection structure.

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