Display panel, display device and repair method of display panel

Abstract

The invention provides a display panel, a display device and a repair method of the display panel. The display panel comprises a substrate, a driving circuit layer, a light-emitting layer and a first wire, the driving circuit layer is located on one side of the substrate, and the driving circuit layer comprises a plurality of driving units and first electrode connecting parts electrically connected with the driving units; the light-emitting layer is located on the side, away from the substrate, of the driving circuit layer, the light-emitting layer comprises light-emitting units corresponding to the multiple driving units, and each light-emitting unit comprises a first electrode electrically connected with the corresponding first electrode connecting part; the first wires are located on the driving circuit layer and located between the adjacent light-emitting units, and the orthographic projections of the first wires on the substrate are at least partially overlapped with the orthographic projections of the first electrodes or the first electrode connecting parts corresponding to the adjacent light-emitting units emitting the same color light on the substrate. In the repairing process of the display panel, a frame is not added, an additional film layer is not added, and the repaired light-emitting unit can be normally lightened and extinguished.

Description

Technical Field

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

[0002] With the development of display technology, the screen size of display panels has continued to increase. However, during the production and use of display panels, defects may occur in the pixel circuits of the display panels, which may cause point defects (bright spots, dark spots) in the display panels, and the defective rate of the display panels will increase significantly. Summary of the invention

[0003] In view of this, an object of the present disclosure is to provide a display panel, a display device and a display panel repair method to alleviate the deficiencies in the related art.

[0004] Based on the above purpose, the present disclosure discloses a display panel, which includes: a substrate;

[0005] a driving circuit layer, located on one side of the substrate, comprising a plurality of driving units and a first electrode connecting portion electrically connected to the driving units, wherein the first electrode connecting portion is located on a side of the driving unit away from the substrate;

[0006] a light-emitting layer, located on a side of the driving circuit layer away from the substrate, comprising light-emitting units corresponding to the plurality of driving units, wherein the light-emitting units include a first electrode electrically connected to the first electrode connecting portion;

[0007] The first wiring is located in the driving circuit layer and between adjacent light-emitting units, and the orthographic projection of the first wiring on the substrate at least partially overlaps with the orthographic projection of the first electrode or the first electrode connecting portion corresponding to the adjacent light-emitting units emitting the same color light on the substrate.

[0008] In one embodiment, the light-emitting unit further includes a light-emitting functional layer and a second electrode, the light-emitting functional layer is located on a side of the first electrode facing away from the substrate, and the second electrode is located on a side of the light-emitting functional layer facing away from the substrate.

[0009] In one embodiment, the first electrode connection portion includes a first sub-electrode connection portion and a second sub-electrode connection portion, the second sub-electrode connection portion is located on a side of the first sub-electrode connection portion away from the substrate, and the first electrode sub-connection portion is electrically connected to the second sub-electrode connection portion;

[0010] The orthographic projection of the first wiring on the substrate at least partially overlaps with the orthographic projection of the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the adjacent light-emitting units emitting light of the same color on the substrate.

[0011] In one embodiment, the driving circuit layer includes:

[0012] A first metal layer, wherein the first trace is located in the first metal layer;

[0013] a second metal layer, located on a side of the first metal layer away from the substrate, wherein the first sub-electrode connecting portion is located on the second metal layer;

[0014] a third metal layer, located on a side of the second metal layer away from the substrate, wherein the second sub-electrode connecting portion is located on the third metal layer;

[0015] Preferably, the driving unit comprises an active layer, the active layer is located on a side of the first metal layer close to the substrate, and the first sub-electrode connecting portion is electrically connected to the active layer;

[0016] Preferably, the active layer includes a channel region and a source region and a drain region located on opposite sides of the channel region;

[0017] Preferably, there is at least one first insulating layer between the active layer and the second metal layer, the at least one first insulating layer is provided with a first via hole, and the first sub-electrode connecting portion is electrically connected to the drain region of the active layer through the first via hole;

[0018] Preferably, at least one second insulating layer is provided between the second metal layer and the third metal layer, the at least one second insulating layer is provided with a second via hole, and the second sub-electrode connecting portion is electrically connected to the first sub-electrode connecting portion through the second via hole;

[0019] Preferably, at least one third insulating layer is provided between the third metal layer and the light emitting unit, the at least one third insulating layer is provided with a third via hole, and the light emitting unit is electrically connected to the third metal layer through the third via hole.

[0020] In one embodiment, the adjacent light emitting units include a first light emitting unit and a second light emitting unit, and the plurality of driving units include a first driving unit and a second driving unit;

[0021] Preferably, the first light emitting unit and the second light emitting unit are arranged adjacent to each other in a first direction;

[0022] or the first light emitting unit and the second light emitting unit are arranged adjacent to each other in a second direction, and the first direction and the second direction intersect each other;

[0023] or the first light emitting unit and the second light emitting unit are disposed adjacent to each other in an oblique direction, and the oblique direction intersects the first direction and the second direction;

[0024] Preferably, a portion of the first routing line close to the first light-emitting unit at least partially overlaps with an orthographic projection of the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the first light-emitting unit on the substrate, and the overlapping portion includes a first welding area; a portion of the first routing line close to the second light-emitting unit at least partially overlaps with an orthographic projection of the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the second light-emitting unit on the substrate, and the overlapping portion includes a second welding area.

[0025] In one embodiment, the electrical connection between the first sub-electrode connecting portion corresponding to one of the light-emitting units and the output end of the driving unit is cut off, and the first wiring is electrically connected to the first electrode or the first electrode connecting portion at the overlap between the first wiring and the first electrode or the first electrode connecting portion corresponding to the adjacent light-emitting unit;

[0026] Preferably, a portion of the first routing line close to the first light-emitting unit is electrically connected to the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the first light-emitting unit at the first welding area, and a portion of the first routing line close to the second light-emitting unit is electrically connected to the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the second light-emitting unit at the second welding area.

[0027] Based on the same inventive concept, the present disclosure also provides a display panel repair method, which includes the following steps:

[0028] Determining an abnormal light-emitting unit in the display panel;

[0029] Cutting off the electrical connection between the abnormal light emitting unit and the driving unit corresponding to the abnormal light emitting unit;

[0030] The first wiring is electrically connected to the abnormal light emitting unit and the driving unit corresponding to the normal light emitting unit adjacent to the abnormal light emitting unit.

[0031] In one embodiment, the step of cutting off the electrical connection between the abnormal light emitting unit and the driving unit corresponding to the abnormal light emitting unit includes:

[0032] cutting off the electrical connection between the first electrode of the abnormal light emitting unit and the output end of the driving unit corresponding to the abnormal light emitting unit,

[0033] Preferably, the electrical connection between the first electrode connecting portion corresponding to the abnormal light-emitting unit and the output end in the driving unit is cut off.

[0034] In one embodiment, the step of electrically connecting the first wiring to the abnormal light emitting unit and the driving unit corresponding to the normal light emitting unit adjacent to the abnormal light emitting unit comprises:

[0035] In the first welding area, the first electrode or the first electrode connecting portion corresponding to the abnormal light-emitting unit is conductively connected to the portion of the first wiring close to the abnormal light-emitting unit by using a laser welding process; in the second welding area, the first electrode or the first electrode connecting portion corresponding to the normal light-emitting unit adjacent to the abnormal light-emitting unit is conductively connected to the portion of the first wiring close to the normal light-emitting unit by using a laser welding process;

[0036] Preferably, in the first welding area, a laser welding process is used to conductively connect the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the abnormal light-emitting unit and the portion of the first wiring close to the abnormal light-emitting unit. In the second welding area, a laser welding process is used to conductively connect the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the normal light-emitting unit adjacent to the abnormal light-emitting unit and the portion of the first wiring close to the normal light-emitting unit.

[0037] Based on the same inventive concept, the present disclosure also provides a display device, which includes the display panel as described above.

[0038] Compared with the prior art, the display panel provided by the present disclosure, by setting a first wiring between adjacent light-emitting units, and the orthographic projection of the first wiring on the substrate overlaps at least partially with the orthographic projection of the first electrode or the first electrode connecting portion corresponding to the adjacent light-emitting unit on the substrate, the overlapping portion can form a local welding point for laser welding, and then the driving unit of the adjacent same-color light-emitting unit can be used to drive the abnormal light-emitting unit, so that the abnormal light-emitting unit can be normally lit. At the same time, the first wiring in the present application is located in the driving circuit layer, which will not increase the width of the frame, meeting the needs of the narrow frame design of the display panel, and the present application realizes the repair of the abnormal light-emitting unit in the display panel without adding an additional film layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A pixel circuit corresponding to the display panel repair method in the prior art Figure 1;

[0041] Figure 2 A pixel circuit corresponding to the display panel repair method in the prior art Figure 2 ;

[0042] Figure 3 A pixel circuit diagram corresponding to the display panel repair method in an embodiment of the present application;

[0043] Figure 4 This is a cross-sectional schematic diagram of adjacent light-emitting units during laser welding in an embodiment of the present application;

[0044] Figure 5 This is a cross-sectional schematic diagram of adjacent light-emitting units when they are not laser welded in an embodiment of the present application;

[0045] Figure 6 The structure diagram of adjacent light-emitting units during laser welding in the embodiment of the present application is shown in FIG. Figure 1 ;

[0046] Figure 7 The structure diagram of adjacent light-emitting units during laser welding in the embodiment of the present application is shown in FIG. Figure 2 ;

[0047] Figure 8 The structure diagram of adjacent light-emitting units during laser welding in the embodiment of the present application is shown in FIG. Figure 3 ;

[0048] Fig. 9 This is a schematic diagram of the structure when adjacent light-emitting units in the first direction are not laser welded in an embodiment of the present application;

[0049] Fig.10 This is a schematic diagram of the structure when adjacent light-emitting units in the second direction are not laser welded in an embodiment of the present application;

[0050] Fig.11 This is a schematic diagram of the structure when adjacent light-emitting units in the first oblique direction are not laser welded in an embodiment of the present application;

[0051] Fig.12 This is a schematic diagram of the structure when adjacent light-emitting units in the second oblique direction are not laser welded in an embodiment of the present application;

[0052] Fig.13 A schematic flow chart of a display panel repair method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0054] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] In the related art, the repair of the defective points in the display panel mainly involves setting a redundant pixel 300 circuit 100 (such as Figure 1 As shown), the anode of the redundant pixel 300 circuit 100 pulls out a horizontal line, which overlaps with the anode line of half of the pixels 300 in the row of pixels 300. The overlapping part is used as a welding point 110. When the optical inspection of the array process finds that one of the pixels 300 has a defect (foreign matter, metal residue, etc.), the laser is first used to cut the line between the pixel 300 circuit and the anode, and then the anode of the pixel 300 is laser welded to the repair line connection line, so that the anode of the abnormal pixel 300 is connected to the redundant pixel 300 circuit 100 at the frame to achieve the repair function. However, in this repair method, at most two pixels 300 in a row can be repaired; the redundant pixel 300 circuit 100 will increase the width of the left and right frames of the display panel; additional IC function support is required. For the repair of bad points in the display panel, a reset voltage 200 can also be set in the display area AA area of ​​the display panel (such as Figure 1 However, the pixel 300 repaired by this method cannot be lit up and can only be a dark spot.

[0056] Based on the above reasons, the present application provides a display panel, a display device and a method for repairing a display panel, wherein the display panel includes a substrate 10, a driving circuit layer 20, a light-emitting layer and a first wiring 41; the driving circuit layer is located on one side of the substrate 10, the driving circuit layer 20 includes a plurality of driving units T and a first electrode connecting portion 42 electrically connected to the driving units T, the first electrode connecting portion 42 is located on a side of the driving unit away from the substrate, the light-emitting layer is located on a side of the driving circuit layer 20 away from the substrate 10, the light-emitting layer includes light-emitting units 30 corresponding to the plurality of driving units T, and the light-emitting unit includes a first electrode electrically connected to the first electrode connecting portion 42; the first wiring 41 is located in the driving circuit layer 20 and between adjacent light-emitting units 30, and the orthographic projection of the first wiring 41 on the substrate 10 at least partially overlaps with the orthographic projection of the first electrode 31 or the first electrode connecting portion 42 corresponding to the adjacent light-emitting unit 30 emitting the same color light on the substrate 10. In the present application, a first wiring 41 is arranged between adjacent light-emitting units 30, and the orthographic projection of the first wiring 41 on the substrate 10 overlaps at least partially with the orthographic projection of the first electrode 31 or the first electrode connecting portion 42 corresponding to the adjacent light-emitting unit 30 on the substrate 10, respectively. The overlapping portion can form a local welding point for laser welding, and then the driving unit T of the adjacent same-color light-emitting unit 30 can be used to drive the abnormal light-emitting unit 30, so that the abnormal light-emitting unit 30 can be normally lit. At the same time, the first wiring 41 in the present application is located in the driving circuit layer 20, which will not increase the width of the frame, meeting the needs of the narrow frame design of the display panel, and the present application realizes the repair of the abnormal light-emitting unit 30 in the display panel without adding an additional film layer.

[0057] Next, combine Figure 3-Figure 12 To describe the display panel provided in the embodiments of the present application.

[0058] refer to Figure 4-Figure 8 The substrate 10 in this embodiment can be a hard substrate 10 made of materials such as glass or plastic, or it can be a flexible substrate 10 made of materials such as polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC) or cellulose acetate propionate (CAP).

[0059] refer to Figure 3-Figure 8In one embodiment, the driving circuit layer 20 is located on one side of the substrate 10, and the driving circuit layer 20 includes a plurality of driving units T and a first electrode connecting portion 42 electrically connected to the driving unit T. The driving unit T drives the corresponding light-emitting unit 30 to emit display light through the first electrode connecting portion 42, that is, the driving unit T is electrically connected to the light-emitting unit 30 through the first electrode connecting portion 42, wherein the first electrode connecting portion 42 includes a first sub-electrode connecting portion 421 and a second sub-electrode connecting portion 422 electrically connected to the first sub-electrode connecting portion 421, and the second sub-electrode connecting portion 422 is located on a side of the first sub-electrode connecting portion 421 away from the substrate 10, that is, the driving unit T is connected to the light-emitting unit 30 through the first sub-electrode connecting portion 421 and the second sub-electrode connecting portion 422 in sequence. 0 is electrically connected, the driving unit T includes an active layer (P-Si) and a gate (G), the gate (G) is located on the side of the active layer (P-Si) away from the substrate 10, the active layer (P-Si) includes a channel region (Y) and a source region (S) and a drain region (D) located on both sides of the channel region (Y), the first electrode connecting portion 42 in this embodiment is electrically connected to the drain region (D) of the active layer, and the first electrode connecting portion is used to transmit a first power supply voltage signal, at least one first insulating layer is arranged between the active layer (P-Si) and the first sub-electrode connecting portion (it can also be said to be the second metal layer M2 described below), and a first via 43 is arranged on the at least one first insulating layer, and the first sub-electrode connecting portion 421 is electrically connected to the drain of the active layer (P-Si) through the first via 43.

[0060] In the film layer structure, the driving circuit layer 20 may include a fourth metal layer M4, a first metal layer M1, a second metal layer M2 and a third metal layer M3 that are stacked and insulated from each other, wherein the fourth metal layer M4 is located on the side of the active layer (P-Si) away from the substrate 10, the gate (G) of the driving unit T is located on the fourth metal layer M4, the first metal layer M1 is located on the side of the fourth metal layer M4 away from the substrate 10, the first wiring 41 is located on the first metal layer M1, the second metal layer M2 is located on the side of the first metal layer M1 away from the substrate 10, the first sub-electrode connecting portion 421 is located on the second metal layer M2, the third metal layer M3 is located on the side of the second metal layer M2 away from the substrate 10, and the second sub-electrode connecting portion 422 is located on the third Metal layer M3, the second sub-electrode connecting portion 43 in the third metal layer M3 is electrically connected to the first electrode 31 of the light-emitting unit 30, at least one second insulating layer is arranged between the third metal layer M3 and the second metal layer M2, and a second via 44 is arranged on at least one second insulating layer, and the second sub-electrode connecting portion 422 in the third metal layer M3 is electrically connected to the first sub-electrode connecting portion 421 in the second metal layer M2 through the second via 44, at least one third insulating layer is arranged between the third metal layer M3 and the light-emitting unit 30, and a third via 45 is arranged on at least one third insulating layer, and the first electrode 31 in the light-emitting unit 30 is electrically connected to the second sub-electrode connecting portion 421 in the third metal layer M3 through the third via 45.

[0061] Exemplarily, in the film layer structure, the driving circuit layer 20 includes a buffer layer 21, an active layer (P-Si), a gate insulating layer 22, a fourth metal layer M4, a capacitor insulating layer 23, a first metal layer M1, an interlayer insulating layer 24, a second metal layer M2, a first flat layer 25 and a third metal layer M3, and a second flat layer 26 which are stacked in sequence, wherein the gate (G) of the driving unit T is located in the fourth metal layer M4; the above-mentioned first via 43 penetrates the gate insulating layer 22, the capacitor insulating layer 23 and the interlayer insulating layer 24 in sequence, a second via 44 is provided on the first flat layer 25, the second sub-electrode connecting portion 421 in the third metal layer M3 is electrically connected to the first sub-electrode connecting portion 421 in the second metal layer M2 through the second via 44, the second flat layer 26 is provided with a third via 45, and the first electrode 31 in the light-emitting unit 30 is electrically connected to the second sub-electrode connecting portion 421 in the third metal layer M3 through the third via 45.

[0062] refer to Figure 3-Figure 12In one embodiment, the light-emitting layer is located on a side of the driving circuit layer 20 away from the substrate 10, and the light-emitting layer includes a plurality of light-emitting units 30 corresponding to the driving unit T, and the plurality of light-emitting units 30 include but are not limited to a red light-emitting unit 30 for emitting red light, a green light-emitting unit 30 for emitting green light, and a blue light-emitting unit 30 for emitting blue light. Each light-emitting unit 30 includes a first electrode 31, a light-emitting functional layer and a second electrode. The light-emitting functional layer is located on a side of the first electrode 31 away from the substrate 10, and the second electrode is located on a side of the light-emitting functional layer away from the substrate 10, wherein the driving unit T is electrically connected to the first electrode 31 of the light-emitting unit 30, and further, the output of the driving unit T The end is electrically connected to the first electrode 31 through the first electrode connecting portion 42. Specifically, the drain region (D) of the active layer (P-Si) in the driving unit T is electrically connected to the first electrode 31 through the first electrode connecting portion 42. When the output end (drain region) of the driving unit T is in a conductive state based on the received on-voltage, the first voltage power signal (ELVDD) received by the source region is provided to the drain region, and is transmitted to the first electrode 31 of the light-emitting unit 30 through the first electrode connecting portion 42, wherein the cathode of the light-emitting unit 30 is electrically connected to the second signal wiring, and the second voltage power signal (ELVSS) is transmitted, and the potential of the first power voltage signal is higher than the potential of the second voltage power signal.

[0063] It should be noted that one of the first electrode 31 and the second electrode can serve as the anode of the light-emitting unit 30 , and the other serves as the cathode of the light-emitting unit 30 . For example, in the present application, the first electrode 31 serves as the anode of the light-emitting unit 30 , and the second electrode serves as the cathode of the light-emitting unit 30 .

[0064] refer to Figure 3-Figure 12 In a specific embodiment, the adjacent light-emitting units 30 include a first light-emitting unit 30a and a second light-emitting unit 30b, and the first light-emitting unit 30a and the second light-emitting unit 30b emit the same color light, such as the first light-emitting unit 30a and the second light-emitting unit 30b both emit green light, such as the first light-emitting unit 30a and the second light-emitting unit 30b both emit red light, such as the first light-emitting unit 30a and the second light-emitting unit 30b both emit blue light. Specifically, in this embodiment, the adjacent light-emitting units 30 can be expressed as the first light-emitting unit 30a and the second light-emitting unit 30b are adjacent in the first direction (X direction) (such as Figure 8 and Fig. 9 As shown in FIG. 1 ), it can also be shown that the first light emitting unit 30a and the second light emitting unit 30b are adjacent to each other in the second direction (Y direction) (as shown in FIG. 1 ). Fig.10 As shown in FIG. 1 , the first direction (X direction) is perpendicular to the second direction (Y direction). It can also be shown that the first light emitting unit 30a and the second light emitting unit 30b are adjacent in the oblique direction (K direction), for example. Fig.11 and Fig.12As an example, a plurality of light emitting units 30 are used, wherein the first red light emitting unit 30 and the second red light emitting unit 30 are adjacent in an oblique direction (K1 direction) (eg Fig. 9 As shown), the first light emitting unit 30a and the second light emitting unit 30b are adjacent to each other in the second oblique direction (K2 direction) (as shown in FIG. Fig.10 As shown in FIG. 1 , the first oblique direction (K1 direction) is different from the second oblique direction (K2 direction), but both intersect with the first direction (X direction) and the second direction (Y direction).

[0065] refer to Figure 3-Figure 12In one embodiment, the first wiring 41 (the first wiring 41 herein may also be referred to as a repair wiring) is located in the driving circuit layer 20 and between adjacent light-emitting units 30, and the adjacent light-emitting units 30 emit the same color light; specifically, in the present application, the first wiring 41 is located in the first metal layer M1 in the driving circuit layer 20, and the orthographic projection of the first wiring 41 on the substrate 10 is at least partially overlapped with the orthographic projection of the first electrode 31 or the first electrode connecting portion 42 corresponding to the adjacent light-emitting units 30 emitting the same color light on the substrate 10, that is, the portion of the first wiring 41 close to the first light-emitting unit 30a is on the substrate 1 0 at least partially overlaps with the orthographic projection of the first electrode 31 or the first electrode connecting portion 42 corresponding to the first light-emitting unit 30a on the substrate 10, and the overlapping portion includes a first welding area 51 (also called a first welding point); the orthographic projection of the portion of the first trace 41 close to the second light-emitting unit 30b on the substrate 10 at least partially overlaps with the orthographic projection of the first electrode 31 or the first electrode connecting portion 42 corresponding to the second light-emitting unit 30b on the substrate 10, and the overlapping portion includes a second welding area 52 (also called a first welding point). This design is prepared for laser welding during subsequent repair. Since the first electrode connection portion in the present application includes the first sub-electrode connection portion 421 and the second sub-electrode connection portion 422, the orthographic projection of the first wiring 41 on the substrate 10 overlaps at least partially with the orthographic projection of the first electrode 31 or the first sub-electrode connection portion 421 or the second sub-electrode connection portion 422 corresponding to the adjacent light-emitting unit 30 emitting the same color light on the substrate 10, that is, the orthographic projection of the portion of the first wiring 41 close to the first light-emitting unit 30a on the substrate 10 overlaps at least partially with the orthographic projection of the first electrode 31 or the first sub-electrode connection portion 421 or the second sub-electrode connection portion 422 corresponding to the first light-emitting unit 30a on the substrate 10, The overlapping portion includes a first welding area 51 (also referred to as a first welding point), and the orthographic projection of the portion of the first wiring 41 close to the second light-emitting unit 30b on the substrate 10 overlaps at least partially with the orthographic projection of the first electrode 31 or the first sub-electrode connection portion 421 or the second sub-electrode connection portion 422 corresponding to the second light-emitting unit 30b on the substrate 10, and the overlapping portion includes a second welding area 52 (also referred to as a first welding point). Of course, the first electrode connection portion in the present application may also include a third sub-electrode connection portion located on the side of the second sub-electrode connection portion away from the substrate, and the number of sub-electrode connections in the first electrode connection portion is not specifically limited here. In this embodiment, by setting the first wiring 41 on the first metal layer M1, there is no need to set a repair circuit in the frame area of ​​the display panel, and it also avoids designing an additional film layer to accommodate the first wiring 41, so this embodiment can achieve the repair of the abnormal light-emitting unit 30 while meeting the requirement of a narrow frame of the display panel.

[0066] It should be noted that, in the present embodiment, the first routing line 41 may extend along the first direction (X direction), along the second direction (Y direction), or along the oblique direction (K direction), as long as the orthographic projections of the first routing line 41 on the substrate 10 at least partially overlap with the orthographic projections of the first signal routing lines 42 corresponding to the adjacent light-emitting units 30 on the substrate 10.

[0067] In one embodiment, since the signal transmission between the active layer (P-Si) and the first electrode 31 must pass through the first sub-electrode connection portion 421 located in the second metal layer M2 and the second sub-electrode connection portion 422 located in the third metal layer M3 in sequence, if a defect is found during optical inspection, the laser cuts off the electrical connection between the output end of the driving unit and the first sub-electrode connection portion 421 in the second metal layer M2, and then the first sub-electrode connection portion 421 or the second sub-electrode connection portion 422 or the first electrode 31 of the abnormal light-emitting unit 30 is electrically connected to the first wiring 41, and the normal light-emitting unit 30 adjacent to the abnormal light-emitting unit 30 is electrically connected to the first wiring 41, thereby achieving conduction between the first electrode 31 of the abnormal light-emitting unit 30 and the driving unit corresponding to the normal light-emitting unit 30.

[0068] refer to Figure 4-Figure 5 and Figure 8-Figure 12 It should be noted that there is a first routing line 41 located in the first metal layer M1. In order to facilitate the connection between the first routing line 41 in the first welding area 51 or the second welding area 51 and the first light-emitting unit 30a or the second light-emitting unit 30b, the first routing line 41 is preferably electrically connected to the first sub-electrode connecting portion 421 in the second metal layer M2, that is, the orthographic projections of the first routing line 41 on the substrate at least partially overlap with the orthographic projections of the first sub-electrode connecting portions 421 corresponding to the adjacent light-emitting units 30 emitting the same color of light on the substrate 10. Therefore, the following takes the example that the orthographic projections of the first routing line 41 on the substrate at least partially overlap with the orthographic projections of the first sub-electrode connecting portions 421 corresponding to the adjacent light-emitting units 30 emitting the same color of light on the substrate 10 as an example to illustrate the repair method of the abnormal light-emitting unit in this embodiment.

[0069] In this embodiment, an example is taken in which an abnormality (such as metal residue, foreign matter, etc.) exists in the driving unit T corresponding to the first light-emitting unit 30a during optical detection, wherein the second light-emitting unit 30b is adjacent to the first light-emitting unit 30a, and the colors of the light emitted by the first light-emitting unit 30a and the second light-emitting unit 30b are the same (such as both are green). The specific repair method is as follows: first, the electrical connection between the output end of the driving unit T corresponding to the first light-emitting unit 30a and the first sub-electrode connecting portion 421 is cut off, thereby cutting off the electrical connection between the first electrode 31 of the first light-emitting unit 30a and the driving unit T corresponding to the first light-emitting unit 30a. Then, a laser welding process is used to realize electrical conduction (electrical connection) between the first wiring 41 and the first sub-electrode connecting portion 421 corresponding to the first light-emitting unit 30a, and electrical conduction (electrical connection) between the first sub-electrode connecting portion 421 corresponding to the second light-emitting unit 30b adjacent to the first light-emitting unit 30a, thereby conducting a repair path between the driving unit T corresponding to the second light-emitting unit 30b and the first electrode 31 of the first light-emitting unit 30a, and then the driving unit T corresponding to the second light-emitting unit 30b replaces the driving unit T corresponding to the first light-emitting unit 30a to drive the first light-emitting unit 30a to emit light.

[0070] It should be noted that the laser welding in this embodiment enables the overlapping portion of the first wiring 41 and the first sub-electrode connecting portion corresponding to the adjacent light-emitting unit 30 to be conductive to achieve electrical connection. The overlapping portion is hereinafter referred to as the second welding area 52 (also referred to as the first welding point) and the second welding area 52 (also referred to as the first welding point). Specifically, it means that under the action of laser energy, at least the first insulating layer of the second welding area 52 and the portion corresponding to the second welding area 52 is burned through to form a fourth via 46 that penetrates at least the first insulating layer, so that the first sub-electrode connecting portion 421 is connected to the first wiring 41. The first sub-electrode connecting portion 421 is connected to the first wiring 41 by laser welding, and the repair success rate is high.

[0071] refer to Fig.13 Based on the same inventive concept, the present application also provides a display panel repair method, which includes the following steps:

[0072] S10: Determine the abnormal light-emitting unit 30 in the display panel;

[0073] S20: Cutting off the electrical connection between the abnormal light emitting unit 30 and the driving unit T;

[0074] S20: Conducting electrical connections between the first wiring 41 and the driving units T corresponding to the abnormal light-emitting unit 30 and the normal light-emitting unit 30 adjacent to the abnormal light-emitting unit 30.

[0075] In one implementation, step S20 specifically includes:

[0076] The electrical connection between the first electrode 31 of the abnormal light-emitting unit 30 and the output end of the driving unit T corresponding to the abnormal light-emitting unit 30 is cut off, where the first electrode 31 specifically refers to the anode of the abnormal light-emitting unit 30. Further, the electrical connection between the output end of the driving unit T corresponding to the abnormal light-emitting unit 30 and the first sub-electrode connecting portion 421 is cut off; thus, the electrical connection between the first electrode 31 of the abnormal light-emitting unit 30 and the driving unit T corresponding to the abnormal light-emitting unit 30 can be cut off.

[0077] In one embodiment, step S30 specifically includes:

[0078] In the first welding area 51, a laser welding process is used to conductively connect the first electrode or the first electrode connecting portion corresponding to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the abnormal light-emitting unit 30; in the second welding area 52, a laser welding process is used to conductively connect the first electrode or the first electrode connecting portion corresponding to the normal light-emitting unit 30 adjacent to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the normal light-emitting unit 30.

[0079] Since the electrical connection between the output terminal of the driving unit T corresponding to the abnormal light-emitting unit 30 and the first sub-electrode connecting portion is cut off in step S20 of the present application, in this embodiment, the first wiring 41 can be conductively connected to one of the first electrode, the first sub-electrode connecting portion or the second electrode connecting portion corresponding to the abnormal light-emitting unit 30. Figure 5 For example, a laser welding process is used to conductively connect the first electrode corresponding to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the abnormal light-emitting unit 30; a laser welding process is used to conductively connect the first electrode corresponding to the normal light-emitting unit 30 adjacent to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the normal light-emitting unit 30; thereby a repair path between the driving unit T corresponding to the abnormal light-emitting unit 30 and the anode of the abnormal light-emitting unit 30 is opened, and then the driving unit T corresponding to the normal light-emitting unit 30 replaces the driving unit T corresponding to the abnormal light-emitting unit 30 to drive the abnormal light-emitting unit 30 to emit light.

[0080] refer to Figure 4For example, a laser welding process is used to conductively connect the first sub-electrode leveling portion 421 corresponding to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the abnormal light-emitting unit 30; a laser welding process is used to conductively connect the first sub-electrode leveling portion 421 corresponding to the normal light-emitting unit 30 adjacent to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the normal light-emitting unit 30; thereby opening a repair path between the driving unit T corresponding to the abnormal light-emitting unit 30 and the anode of the abnormal light-emitting unit 30, and then the driving unit T corresponding to the normal light-emitting unit 30 replaces the driving unit T corresponding to the abnormal light-emitting unit 30 to drive the abnormal light-emitting unit 30 to emit light.

[0081] refer to Figure 6 For example, a laser welding process is used to conductively connect the second sub-electrode leveling portion 422 corresponding to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the abnormal light-emitting unit 30; a laser welding process is used to conductively connect the second sub-electrode leveling portion 422 corresponding to the normal light-emitting unit 30 adjacent to the abnormal light-emitting unit 30 and the portion of the first wiring 41 close to the normal light-emitting unit 30; thereby opening a repair path between the driving unit T corresponding to the abnormal light-emitting unit 30 and the anode of the abnormal light-emitting unit 30, and then the driving unit T corresponding to the normal light-emitting unit 30 replaces the driving unit T corresponding to the abnormal light-emitting unit 30 to drive the abnormal light-emitting unit 30 to emit light.

[0082] It should be noted that the conduction in this embodiment specifically refers to the realization of electrical connection between the first wiring 41 and the signal transmission wiring. The first welding area 51 in this embodiment specifically refers to the overlapping part of the orthographic projection of the first wiring 41 on the substrate 10 and the orthographic projection of the driving unit T corresponding to the abnormal light-emitting unit 30 on the substrate 10, which can also be understood as the overlapping part of the orthographic projection of the first wiring 41 on the substrate 10 and the orthographic projection of the signal transmission wiring corresponding to the abnormal light-emitting unit 30 on the substrate 10, and the second welding area 52 specifically refers to the overlapping part of the orthographic projection of the first wiring 41 on the substrate 10 and the orthographic projection of the driving unit T corresponding to the normal light-emitting unit 30 on the substrate 10, which can also be understood as the overlapping part of the orthographic projection of the first wiring 41 on the substrate 10 and the orthographic projection of the signal transmission wiring corresponding to the normal light-emitting unit 30 on the substrate 10.

[0083] Furthermore, the conduction in this embodiment specifically refers to achieving electrical connection between the first wiring 41 and the signal transmission wiring.

[0084] The present application also provides a display device, which includes the display panel in the present disclosure. The display device may include a device with image processing capabilities, such as a mobile phone, a tablet computer, a wearable device, a server, a personal computer, a laptop computer, etc. Since the display device includes the display panel in the present application, the display effect of the display device is better.

[0085] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0086] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display panel, characterized in that: include: substrate; a driving circuit layer, located on one side of the substrate, comprising a plurality of driving units and a first electrode connecting portion electrically connected to the driving units, wherein the first electrode connecting portion is located on a side of the driving unit away from the substrate; a light-emitting layer, located on a side of the driving circuit layer away from the substrate, comprising light-emitting units corresponding to the plurality of driving units, wherein the light-emitting units include a first electrode electrically connected to the first electrode connecting portion; The first wiring is located in the driving circuit layer and between adjacent light-emitting units, and the orthographic projection of the first wiring on the substrate at least partially overlaps with the orthographic projection of the first electrode or the first electrode connecting portion corresponding to the adjacent light-emitting units emitting the same color light on the substrate.

2. The display panel according to claim 1, wherein: The light-emitting unit further includes a light-emitting functional layer and a second electrode. The light-emitting functional layer is located on a side of the first electrode facing away from the substrate, and the second electrode is located on a side of the light-emitting functional layer facing away from the substrate.

3. The display panel according to claim 1, wherein: The first electrode connecting portion includes a first sub-electrode connecting portion and a second sub-electrode connecting portion, the second sub-electrode connecting portion is located at a side of the first sub-electrode connecting portion away from the substrate, and the first electrode sub-connecting portion is electrically connected to the second sub-electrode connecting portion; The orthographic projection of the first wiring on the substrate at least partially overlaps with the orthographic projection of the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the adjacent light-emitting units emitting light of the same color on the substrate.

4. The display panel according to claim 3, wherein: The driving circuit layer comprises: A first metal layer, wherein the first trace is located in the first metal layer; a second metal layer, located on a side of the first metal layer away from the substrate, wherein the first sub-electrode connecting portion is located on the second metal layer; a third metal layer, located on a side of the second metal layer away from the substrate, wherein the second sub-electrode connecting portion is located on the third metal layer; Preferably, the driving unit comprises an active layer, the active layer is located on a side of the first metal layer close to the substrate, and the first sub-electrode connecting portion is electrically connected to the active layer; Preferably, the active layer includes a channel region and a source region and a drain region located on opposite sides of the channel region; Preferably, there is at least one first insulating layer between the active layer and the second metal layer, the at least one first insulating layer is provided with a first via hole, and the first sub-electrode connecting portion is electrically connected to the drain region of the active layer through the first via hole; Preferably, at least one second insulating layer is provided between the second metal layer and the third metal layer, the at least one second insulating layer is provided with a second via hole, and the second sub-electrode connecting portion is electrically connected to the first sub-electrode connecting portion through the second via hole; Preferably, at least one third insulating layer is provided between the third metal layer and the light emitting unit, the at least one third insulating layer is provided with a third via hole, and the light emitting unit is electrically connected to the third metal layer through the third via hole.

5. The display panel according to claim 4, wherein: The adjacent light emitting units include a first light emitting unit and a second light emitting unit, and the plurality of driving units include a first driving unit and a second driving unit; Preferably, the first light emitting unit and the second light emitting unit are arranged adjacent to each other in a first direction; or the first light emitting unit and the second light emitting unit are arranged adjacent to each other in a second direction, and the first direction and the second direction intersect each other; or the first light emitting unit and the second light emitting unit are disposed adjacent to each other in an oblique direction, and the oblique direction intersects the first direction and the second direction; Preferably, a portion of the first routing line close to the first light-emitting unit at least partially overlaps with an orthographic projection of the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the first light-emitting unit on the substrate, and the overlapping portion includes a first welding area; a portion of the first routing line close to the second light-emitting unit at least partially overlaps with an orthographic projection of the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the second light-emitting unit on the substrate, and the overlapping portion includes a second welding area.

6. The display panel according to claim 5, wherein: Cutting off the electrical connection between the first sub-electrode connecting portion corresponding to one of the light-emitting units and the output end of the driving unit, and electrically connecting the first wiring to the first electrode or the first electrode connecting portion corresponding to the adjacent light-emitting unit at the overlapping position of the first wiring and the first electrode or the first electrode connecting portion; Preferably, a portion of the first routing line close to the first light-emitting unit is electrically connected to the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the first light-emitting unit at the first welding area, and a portion of the first routing line close to the second light-emitting unit is electrically connected to the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the second light-emitting unit at the second welding area.

7. A display panel repair method, characterized in that: The steps include: Determining an abnormal light-emitting unit in the display panel; Cutting off the electrical connection between the abnormal light emitting unit and the driving unit corresponding to the abnormal light emitting unit; The first wiring is electrically connected to the abnormal light emitting unit and the driving unit corresponding to the normal light emitting unit adjacent to the abnormal light emitting unit.

8. The maintenance method according to claim 7, characterized in that: The step of cutting off the electrical connection between the abnormal light emitting unit and the driving unit corresponding to the abnormal light emitting unit comprises: cutting off the electrical connection between the first electrode of the abnormal light emitting unit and the output end of the driving unit corresponding to the abnormal light emitting unit, Preferably, the electrical connection between the first electrode connecting portion corresponding to the abnormal light-emitting unit and the output end in the driving unit is cut off.

9. The maintenance method according to claim 8, characterized in that: The step of conducting electrical connection between the first wiring and the driving units corresponding to the abnormal light-emitting unit and the normal light-emitting unit adjacent to the abnormal light-emitting unit comprises: In the first welding area, the first electrode or the first electrode connecting portion corresponding to the abnormal light-emitting unit is conductively connected to the portion of the first wiring close to the abnormal light-emitting unit by using a laser welding process; in the second welding area, the first electrode or the first electrode connecting portion corresponding to the normal light-emitting unit adjacent to the abnormal light-emitting unit is conductively connected to the portion of the first wiring close to the normal light-emitting unit by using a laser welding process; Preferably, in the first welding area, a laser welding process is used to conductively connect the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the abnormal light-emitting unit and the portion of the first wiring close to the abnormal light-emitting unit. In the second welding area, a laser welding process is used to conductively connect the first electrode or the first sub-electrode connecting portion or the second sub-electrode connecting portion corresponding to the normal light-emitting unit adjacent to the abnormal light-emitting unit and the portion of the first wiring close to the normal light-emitting unit.

10. A display device, characterized in that: The invention comprises a display panel as described in any one of claims 1 to 6.

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