CN111952347B

CN111952347B - Display substrate, repairing method thereof and display panel

Info

Publication number: CN111952347B
Application number: CN202010858569.7A
Authority: CN
Inventors: 秦纬; 杨锦
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2023-07-18
Anticipated expiration: 2040-08-24
Also published as: CN111952347A

Abstract

The invention provides a display substrate, a repairing method thereof and a display panel, and relates to the technical field of display. The display substrate comprises sub-pixels arranged in an array, wherein each sub-pixel comprises a first driving unit and a light emitting unit, and the output end of the first driving unit is electrically connected with the input end of the light emitting unit; at least one row of maintenance pixels arranged along the first direction, wherein the maintenance pixels comprise second driving units, and the structures of the second driving units are the same as those of the first driving units; the repair line comprises at least one first connection point and a plurality of second connection points, wherein the first connection point is used for electrically connecting the output end of the second driving unit corresponding to the repair pixel when repairing the first driving unit, and the second connection point is used for electrically connecting the input end of the light emitting unit corresponding to the sub-pixel when repairing the first driving unit. The invention is suitable for manufacturing the display substrate.

Description

Display substrate, repairing method thereof and display panel

Technical Field

The invention relates to the technical field of display, in particular to a display substrate, a repairing method thereof and a display panel.

Background

An OLED (organic light-emitting diode) display panel has advantages of self-luminescence, full solid state, high contrast, etc., and becomes the display panel with the most potential in recent years.

In order to meet the requirements of high resolution and uniformity, the driving circuit structure of the OLED display panel adopts a 7T1C structure. The circuit structure is complex, and the manufacturing process is very complex, and 11-14 layers are generally required to be manufactured on glass or PI substrates through repeated film forming, gluing, exposure, development, etching and stripping processes. In this manufacturing process, loss of yield is unavoidable. How to reduce yield loss is a concern in actual production at present.

Disclosure of Invention

The embodiment of the invention provides a display substrate, a repairing method thereof and a display panel.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:

in one aspect, there is provided a display substrate including: the display device comprises a plurality of sub-pixels arranged in an array, wherein each sub-pixel comprises a first driving unit and a light emitting unit, and the output end of the first driving unit is electrically connected with the input end of the light emitting unit;

at least one row of maintenance pixels arranged along a first direction, wherein the maintenance pixels are positioned on at least one side of a plurality of sub-pixels, the maintenance pixels comprise a second driving unit, and the structure of the second driving unit is the same as that of the first driving unit;

a plurality of repair lines arranged along the first direction, one repair line corresponding to at least one repair pixel, each row of sub-pixels arranged along the second direction corresponding to at least one repair line, the repair line including at least one first connection point for electrically connecting an output end of the second driving unit corresponding to the repair pixel when repairing the first driving unit and a plurality of second connection points for electrically connecting an input end of the light emitting unit corresponding to the sub-pixel when repairing the first driving unit; the first direction is perpendicular to the second direction.

Optionally, the first direction is a long side direction of the display substrate, and the second direction is a short side direction of the display substrate;

a row of maintenance pixels arranged along the first direction are respectively arranged on two opposite sides of the plurality of sub-pixels;

one of the repair lines corresponds to two repair pixels, and each row of the subpixels arranged along the second direction corresponds to one repair line; the repair line comprises two first connection points and a plurality of second connection points.

Optionally, the same ends of the plurality of maintenance lines are all connected.

Alternatively, in the case where no failure occurs in the first driving unit of each of the sub-pixels in the display substrate, the repair line is used as an initial signal line or a power signal line.

Optionally, a plurality of the maintenance lines are not connected to each other.

Optionally, the sub-pixel further comprises a conductive electrode;

each maintenance line passes through the area where the corresponding row of the sub-pixels are located, and is arranged in the same layer as the conductive electrode of each row of the sub-pixels without overlapping.

Optionally, the conductive electrode is an anode and is located in the area where the light emitting unit is located; the anode is electrically connected with the output end of the first driving unit.

Optionally, the subpixel further includes a connection electrode, where the connection electrode is electrically connected to the anode and the output end of the first driving unit, and is further configured to electrically connect the corresponding second connection point when repairing the first driving unit.

Optionally, the display substrate further includes:

a plurality of data lines arranged along the second direction; at least one data line is arranged between two adjacent rows of sub-pixels;

and the number of the maintenance data lines is the same as the number of the rows of the maintenance pixels, and the maintenance data lines are positioned at one side of a corresponding row of the maintenance pixels and are electrically connected with the corresponding second driving units.

In another aspect, there is provided a display panel including: and (5) repairing the display substrate.

In still another aspect, a method for repairing a display substrate is provided, the method including:

determining a defective point of the display substrate;

and repairing by adopting a maintenance pixel and a maintenance line according to the position of the defective point.

Optionally, the defective spot is located at a first driving unit of the sub-pixel;

repairing with a repair pixel and a repair line according to the position of the defective point comprises:

cutting off the output end of the first driving unit with the bad point;

electrically connecting an input end of a light emitting unit of the sub-pixel having the defective point and a second connection point of the corresponding repair line;

and the first connecting point of the maintenance line is electrically connected with the output end of the second driving unit corresponding to the maintenance pixel.

Optionally, the same ends of the plurality of maintenance lines are all connected;

before the cutting off the output end of the first driving unit having the defective point, the repairing with a repair pixel and a repair line according to the position of the defective point further includes:

cutting off both ends of the repair line corresponding to the sub-pixel having the defective point.

Optionally, the defect point is located on the data line;

the data line with the bad points and the two maintenance lines are respectively and electrically connected, and the bad points are positioned between the two maintenance lines;

and respectively and electrically connecting the two maintenance lines with the same maintenance data line.

In yet another aspect, a display substrate is provided, which is formed using the repair method described above.

The embodiment of the invention provides a display substrate, a repairing method thereof and a display panel, wherein the display substrate comprises the following components: the display device comprises a plurality of sub-pixels arranged in an array, wherein each sub-pixel comprises a first driving unit and a light emitting unit, and the output end of the first driving unit is electrically connected with the input end of the light emitting unit; at least one row of maintenance pixels arranged along a first direction, wherein the maintenance pixels are positioned on at least one side of a plurality of sub-pixels, the maintenance pixels comprise a second driving unit, and the structure of the second driving unit is the same as that of the first driving unit; a plurality of repair lines arranged along the first direction, one repair line corresponding to at least one repair pixel, each row of sub-pixels arranged along the second direction corresponding to at least one repair line, the repair line including at least one first connection point for electrically connecting an output end of the second driving unit corresponding to the repair pixel when repairing the first driving unit and a plurality of second connection points for electrically connecting an input end of the light emitting unit corresponding to the sub-pixel when repairing the first driving unit; the first direction is perpendicular to the second direction.

If the first driving unit of the sub-pixel has a defective point, the output end of the first driving unit may be cut off, so that the first driving unit and the light emitting unit are disconnected; and then, connecting a second connection point of the maintenance line corresponding to the first driving unit with the input end of the light-emitting unit, and then connecting the first connection point of the maintenance line with the output end of the second driving unit of the corresponding maintenance pixel, so that the light-emitting unit is electrically connected with the second driving unit of the corresponding maintenance pixel through the maintenance line, namely, the second driving unit is adopted to replace the defective first driving unit, and the repair is completed. When the repaired display substrate is used for displaying, the control signal of the first driving unit with the original bad is input to the second driving unit, so that the light-emitting unit emits light normally, and the repair of the sub-pixels is realized. The display substrate can repair defects, reduce yield loss and further reduce production cost.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of a first driving unit according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a repair principle provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a display substrate according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a red subpixel layout according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a layout of a green subpixel according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a blue subpixel layout according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;

fig. 10 is a schematic diagram of the layout of fig. 2.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the embodiments of the present invention, the words "first," "second," and the like are used to distinguish between the same item or similar items that have substantially the same function and function, and are merely used to clearly describe the technical solutions of the embodiments of the present invention, and are not to be construed as indicating or implying relative importance or implying that the number of technical features indicated is indicated.

In embodiments of the invention, the meaning of "a plurality of" means two or more, the meaning of "at least one" means one or more, and the meaning of "at least one row" means one or more than one row, unless specifically defined otherwise.

In the embodiments of the present invention, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of description, and are not indicative or implying that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.

Example 1

An embodiment of the present invention provides a display substrate, shown in fig. 1, including:

the array arrangement comprises a plurality of sub-pixels 1, wherein each sub-pixel comprises a first driving unit and a light emitting unit, and the output end of the first driving unit is electrically connected with the input end of the light emitting unit.

At least one row of repair pixels 2 arranged along the first direction, the repair pixels 2 being located at least one side of the plurality of sub-pixels 1, the repair pixels 2 including a second driving unit having the same structure as the first driving unit.

A plurality of repair lines 3 arranged along a first direction, one repair line corresponding to at least one repair pixel, each row of sub-pixels arranged along a second direction corresponding to at least one repair line, the repair lines including at least one first connection point n1 for electrically connecting an output end of a second driving unit corresponding to the repair pixel when repairing the first driving unit and a plurality of second connection points n2 for electrically connecting an input end of a light emitting unit corresponding to the sub-pixel when repairing the first driving unit; the first direction and the second direction are perpendicular.

The specific structure of the first driving unit is not limited herein, and the first driving unit may include a 7T1C structure, and as shown in fig. 2 and 10, the 7T1C structure includes 7 transistors (respectively labeled M1, M2, M3, M4, M5, M6, and DTFT) and 1 capacitor Cst, the Gate of the transistor M1 is electrically connected to the first Gate signal line Gate (N-1), the source electrical connection node N3, the drain electrical connection initial signal line Vint, the Gate of the transistor M2 is electrically connected to the second Gate signal line Gate (N), the source electrical connection node N3, the drain electrical connection node N4, the Gate of the transistor M3 is electrically connected to the second Gate signal line Gate (N), the source electrical connection node Data, the source electrical connection node N2, the Gate electrical connection light emitting control signal line EM, the source electrical connection node N1, the drain electrical connection node N2, the Gate of the transistor M5 is electrically connected to the first Gate signal line Gate, the source electrical connection node N4, the drain electrical connection node N6, the drain electrical connection node N2, the drain electrical connection node N of the drain electrode of the OLED, and the drain electrical connection node N1, the drain electrical connection node N2, the drain electrical connection node N of the drain electrical connection node N2, and the drain electrical connection node N of the drain electrical connection node N2. It should be noted that, in the embodiments of the present invention, only the matters related to the invention are described, and the driving process and the timing of the circuit shown in fig. 2 may be obtained from the related art, which is not repeated here.

The specific structure of the light emitting unit is not limited herein, and the light emitting unit may include an OLED as shown in fig. 2, or may further include other electroluminescent diodes such as a QLED (QuantumDot LightEmittingDiodes, quantum dot light emitting diode).

Here, the sub-pixel may be any one of a red sub-pixel, a green sub-pixel, or a blue sub-pixel. The display substrate may include three sub-pixels of red sub-pixel, green sub-pixel or blue sub-pixel at the same time; of course, it is also possible to include only one sub-pixel, for example: only the plurality of red sub-pixels, or only the plurality of green sub-pixels, or only the plurality of blue sub-pixels are included. And can be specifically determined according to actual requirements.

The display substrate is generally rectangular, the first direction may be a long side direction of the display substrate, and the second direction may be a short side direction of the display substrate; alternatively, the first direction may be a short side direction of the display substrate, and the second direction may be a long side direction of the display substrate, and the first direction is an OA direction and the second direction is an OB direction, which are shown in fig. 1, without limitation.

At least one row of the repair pixels arranged along the first direction may be at least one row, or may also be at least one column. The number of rows and the specific positions of the repair pixels are not limited, and may be determined according to practical situations. Referring to fig. 1, the display substrate may include two rows of repair pixels 2 located at left and right sides of the plurality of sub-pixels 1, in which case the two rows of repair pixels are two columns of repair pixels; alternatively, as shown with reference to fig. 3, the display substrate may further include a row of repair pixels 2 located at an upper side of the plurality of sub-pixels 1, in which case the row of repair pixels is a row of repair pixels.

The repair line may pass through the region where the corresponding sub-pixel is located as shown in fig. 1 and 3, or the repair line may be located in the region between two adjacent rows of sub-pixels. The former may be selected in view of affecting the aperture ratio as little as possible.

The repair principle is described below with reference to the defect point (defect position) 10 shown in fig. 4 being located at the drain terminal of the driving transistor DTFT. Of course, the defective point may be located at another position of the first driving unit, and only the defective point position shown in fig. 4 will be described as an example.

Referring to fig. 4, a defective point (defect position) 10 is located at the drain terminal of the driving transistor DTFT, at which time laser cutting may be performed at a cutting position 11, thereby cutting off the output terminal of the first driving unit, so that the first driving unit and the light emitting unit are disconnected; then, laser welding is performed at the welding position 12, the second connection point of the repair line corresponding to the first driving unit and the input end of the light emitting unit are connected, and then the first connection point of the repair line and the output end of the second driving unit corresponding to the repair pixel are connected at the welding position 13, so that the light emitting unit is electrically connected with the second driving unit corresponding to the repair pixel through the repair line. The second driving unit is adopted to replace the defective first driving unit so as to finish the repair. When the repaired display substrate is used for displaying, the control signal of the first driving unit with the original bad is input to the second driving unit, so that the light-emitting unit emits light normally, and the repair of the sub-pixels is realized.

The embodiment of the invention provides a display substrate, which can repair defects, reduce yield loss and further reduce production cost.

Alternatively, referring to fig. 1, the first direction is a long side direction OB of the display substrate, and the second direction is a short side direction OA of the display substrate. A row of maintenance pixels arranged along the first direction are respectively arranged on two opposite sides of the plurality of sub-pixels. One maintenance line corresponds to two maintenance pixels, and each row of sub-pixels arranged along the second direction corresponds to one maintenance line; the repair line comprises two first connection points and a plurality of second connection points.

Referring to fig. 1, a row of repair pixels arranged along a first direction is respectively disposed on opposite sides of a plurality of sub-pixels, namely: a row of repair pixels 2 arranged in the OA direction are respectively provided on the left and right sides of the plurality of sub-pixels 1.

The structure can repair the first driving units of two defective sub-pixels in any row of sub-pixels, and has simple structure and high utilization rate of maintenance lines. Since one repair line corresponds to two repair pixels, if two defective first driving units in one row of sub-pixels are repaired at the same time, the repair line needs to be cut off to form two repair lines, and then repair the repair lines respectively. Therefore, the production of one maintenance line can be reduced, the utilization rate of the maintenance line is improved, and the production cost is reduced.

Optionally, the same ends of the plurality of repair lines are all connected. The specific connection method is not limited herein. Referring to fig. 5, the display substrate further includes a first repair connection line 6 and a second repair connection line 7, and the left ends of the plurality of repair lines 3 are respectively connected with the first repair connection line 6, and the right ends thereof are respectively connected with the second repair connection line 7, thereby realizing that the same ends of the plurality of repair lines are all connected. When the first driving unit of each sub-pixel in the display substrate is defective, it is necessary to cut off both ends (C1 and C2 ends) of the corresponding repair line 3 and repair the same, as shown in fig. 5.

Further alternatively, in the case where no failure occurs in the first driving unit of each sub-pixel in the display substrate, the repair line is used as the initial signal line Vint or the power signal line VDD. In this way, on the one hand, the utilization of the repair line can be improved. On the other hand, when the display substrate is applied to a large-sized OLED display device, the voltage difference between the transmission distal end and the near end of the initial signal line Vint or the power signal line VDD in the whole display area is large, which is easy to cause the problem of uneven display; the repair line is used as the initial signal line Vint or the power signal line VDD, and may form a mesh structure with the initial signal line Vint or the power signal line VDD, respectively, which have been set, to reduce resistance, thereby improving display uniformity.

Alternatively, referring to FIG. 1, a plurality of repair lines are not connected to each other. The structure is simple, and a maintenance connecting wire is not required to be arranged.

Optionally, in order to reduce the manufacturing difficulty and save the cost, the sub-pixel further comprises a conductive electrode; each maintenance line passes through the area where the corresponding row of sub-pixels are located, and is arranged on the same layer as the conductive electrode of each row of sub-pixels without overlapping.

The conductive electrode may be any one of an anode, a gate electrode and a source/drain electrode, and may be any other metal electrode, which is not limited herein.

The arrangement of the maintenance line and the conductive electrode in the same layer means that the maintenance line and the conductive electrode are manufactured by adopting a one-time composition process. The primary patterning process refers to a process of forming a desired layer structure through a primary film formation and photolithography. The primary patterning process comprises film forming, exposing, developing, etching, stripping and other processes.

Further optionally, in order not to affect the aperture ratio and resolution, the conductive electrode is an anode, and is located in the area where the light emitting unit is located; the anode is electrically connected with the output end of the first driving unit.

The shape of the anode is not limited here. In an OLED display screen, due to the difference of luminous efficiency of the red, green and blue light emitting materials, the luminous areas of the red, green and blue sub-pixels are generally different, that is, the areas of anodes of the red, green and blue sub-pixels are different.

Fig. 6, 7 and 8 are schematic layout diagrams of red, green and blue sub-pixels, respectively. Referring to fig. 6 to 8, the anode 20 of the red, green and blue sub-pixels may each be shaped as a diamond; since the light emitting efficiency of the three light emitting materials of blue, red and green is sequentially increased at present, the anode areas of the blue, red and green sub-pixels are sequentially reduced.

Optionally, for better protection of the anode, referring to fig. 6-8, the sub-pixel further comprises a connection electrode 21 electrically connecting the anode and the output of the first drive unit, and for electrically connecting the corresponding second connection point when repairing the first drive unit.

The connecting electrode can be arranged on the same layer as the source electrode, the drain electrode and the data line, so that the process flow is further reduced, and the production cost is reduced.

In fig. 6-8, the first driving unit adopts the 8T1C structure shown in fig. 2, and the output terminal of the first driving unit is the drain terminal of the transistor M5. If the first driving unit shown in fig. 6-8 is defective, then cutting may be performed at the cutting positions 22 in fig. 6-8, respectively, such that the drain electrode of the transistor M5 is disconnected from the anode of the OLED, and then laser welding is performed at the welding positions 23 to connect the second connection point of the repair line corresponding to the first driving unit and the anode of the OLED; and then connecting the first connection point of the maintenance line and the output end of the second driving unit corresponding to the maintenance pixel to complete the repair.

Optionally, referring to fig. 1, the display substrate further includes:

a plurality of Data lines (labeled Data1, data2 … … Data1080, respectively, in fig. 1) arranged along a second direction; at least one data line is arranged between two adjacent rows of sub-pixels 1.

At least one repair data line 4 arranged along the second direction, wherein the number of the repair data lines is the same as that of the rows of repair pixels, and the repair data lines are positioned at one side of a row of corresponding repair pixels and are electrically connected with the corresponding second driving units.

Referring to fig. 1, the display substrate includes two rows of repair pixels 2 positioned at left and right sides of a plurality of sub-pixels 1, and the number of repair data lines 4 is also two, and the repair data lines may supply data line signals to the second driving unit.

In the display substrate, if the data line is bad, the repair can be performed through the repair line and the repair data line. In fig. 9, the defective point 31 of the n-1 data line Datan-1 will be described as an example. Welding at the position D1 and the position D4 respectively, so that the n-1 data line Datan-1 is electrically connected with a maintenance line 3 corresponding to the third last row of sub-pixels and a maintenance line 3 corresponding to the last row of sub-pixels respectively; then, the welding is performed at the positions D2 and D3, respectively, so that the two repair lines 3 are electrically connected to the repair data lines 4 on the left side, respectively. In this way, the signal in the n-1 Data line Datan-1 can be transmitted to the n-1 Data line Data n-1 below the defective point through the repair line 3 corresponding to the third last row of sub-pixels, the repair Data line 4 on the left side and the repair line 3 corresponding to the last row of sub-pixels, so as to realize repair.

It should be noted that, referring to fig. 1, the display substrate may further include a plurality of Gate lines (labeled Gate1, gate2, … … gate+1 in fig. 1) arranged along the first direction for providing the Gate signals.

Example two

The embodiment of the invention provides a display panel, which comprises a display substrate provided by the repaired embodiment I.

The display panel may be a flexible display panel (also called a flexible screen), or may be a rigid display panel (i.e., a display panel that cannot be bent), which is not limited herein.

The display panel can be an OLED display panel, a QLED display panel, and any product or component with display function such as a television, a digital camera, a mobile phone, a tablet personal computer and the like comprising the display panels.

Example III

The embodiment of the invention provides a method for repairing a display substrate, which is as described in embodiment one, and comprises the following steps:

s01, determining the defective point of the display substrate.

S02, repairing by using a maintenance pixel and a maintenance line according to the position of the defective point.

It should be noted that, before S01, the method may further include: detecting whether the display substrate has a defective dot, and if so, performing S01 again.

Optionally, if the defective point is located in the first driving unit of the sub-pixel, repairing the defective point with the repair pixel and the repair line according to the location of the defective point S02 includes:

s101, cutting off an output end of the first driving unit with the bad point, so that the first driving unit and the light emitting unit are disconnected.

S102, electrically connecting the input end of the light-emitting unit of the sub-pixel with the defective point and the second connection point of the corresponding maintenance line.

S103, electrically connecting the first connection point of the maintenance line and the output end of the second driving unit corresponding to the maintenance pixel.

It should be noted that S102 and S103 may be executed first S102 and then S103; alternatively, S103 may be executed first and S102 may be executed second, which is not limited herein. The repairing method is simple and easy to implement and has strong operability.

Further alternatively, referring to fig. 5, multiple repair lines are connected at the same end.

Before cutting off the output end of the first driving unit having the defective point at S101, repairing with the repair pixel and the repair line according to the position of the defective point at S02 further includes:

s100, cutting off two ends of a maintenance line corresponding to the sub-pixel with the defective point.

Optionally, if the defective point is located on the data line, repairing the defective point with the repair pixel and the repair line according to the location of the defective point S02 includes:

s201, electrically connecting a data line with a defective point and two maintenance lines respectively, wherein the defective point is located between the two maintenance lines.

Referring to fig. 9, the n-1 data line Datan-1 is electrically connected to the repair line 3 corresponding to the third last row of subpixels and the repair line 3 corresponding to the last row of subpixels by soldering at the positions D1 and D4, respectively.

S202, two maintenance lines are respectively and electrically connected with the same maintenance data line.

As shown in fig. 9, the welding is performed at the positions D2 and D3, respectively, so that the two repair lines 3 are electrically connected to the left repair data line 4, respectively.

In this way, the signal in the n-1 data line Datan-1 can be transmitted to the n-1 data line Datan-1 below the defective point through the repair line 3 corresponding to the sub-pixel in the third row, the repair data line on the left side and the repair line 3 corresponding to the sub-pixel in the last row, so as to realize repair.

The structure of the display substrate in this embodiment may refer to the description related to the first embodiment, and will not be repeated here.

Example IV

The embodiment of the invention provides a display substrate, which is formed by adopting the repairing method of any one of the third embodiment. The defects in the display substrate have been repaired and can be used to form a display panel.

The display panel may be a flexible display panel (also called a flexible screen), or may be a rigid display panel (i.e., a display panel that cannot be bent), which is not limited herein. The display panel can be an OLED display panel, a QLED display panel, and any product or component with display function such as a television, a digital camera, a mobile phone, a tablet personal computer and the like comprising the display panels.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A display substrate, comprising:

the display device comprises a plurality of sub-pixels arranged in an array, wherein each sub-pixel comprises a first driving unit and a light emitting unit, and the output end of the first driving unit is electrically connected with the input end of the light emitting unit;

a plurality of repair lines arranged along the first direction, one repair line corresponding to at least one repair pixel, each row of sub-pixels arranged along the second direction corresponding to at least one repair line, the repair line including at least one first connection point for electrically connecting an output end of the second driving unit corresponding to the repair pixel when repairing the first driving unit and a plurality of second connection points for electrically connecting an input end of the light emitting unit corresponding to the sub-pixel when repairing the first driving unit; the first direction is perpendicular to the second direction;

in the case where no failure occurs in the first driving unit of each of the sub-pixels in the display substrate, the repair line serves as an initial signal line or a power signal line.

2. The display substrate according to claim 1, wherein the first direction is a long-side direction of the display substrate, and the second direction is a short-side direction of the display substrate;

3. The display substrate of claim 2, wherein a plurality of the repair lines are connected at the same end.

4. The display substrate of claim 2, wherein a plurality of the repair lines are not connected to each other.

5. The display substrate of any one of claims 1-4, wherein the sub-pixel further comprises a conductive electrode;

6. The display substrate according to claim 5, wherein the conductive electrode is an anode, and is located in a region where the light emitting unit is located; the anode is electrically connected with the output end of the first driving unit.

7. The display substrate according to claim 6, wherein the sub-pixel further comprises a connection electrode electrically connecting the anode and the output terminal of the first driving unit, and further for electrically connecting the corresponding second connection point when repairing the first driving unit.

8. The display substrate of claim 1, wherein the display substrate further comprises:

9. A display panel comprising a repaired display substrate according to any one of claims 1-7.

10. A method of repairing a display substrate according to any one of claims 1 to 8, the method comprising:

determining a defective point of the display substrate;

repairing by adopting a maintenance pixel and a maintenance line according to the position of the defective point;

the bad point is located on the data line;