CN109036325B

CN109036325B - Scanning drive circuit and display device

Info

Publication number: CN109036325B
Application number: CN201811185080.7A
Authority: CN
Inventors: 于靖; 韦培海; 庄崇营; 李林
Original assignee: Truly Semiconductors Ltd
Current assignee: Truly Semiconductors Ltd
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2021-04-23
Anticipated expiration: 2038-10-11
Also published as: CN109036325A

Abstract

The invention provides a scanning driving circuit and a display device, and relates to the technical field of display. Wherein, the scanning drive circuit includes: the first GIP cascade group comprises a plurality of GIP units in cascade connection and is used for respectively sending scanning signals to each scanning line in the pixel array substrate; and the second GIP cascade group comprises a plurality of cascade-connected GIP units and is used for replacing the first GIP cascade group to respectively send scanning signals to each scanning line when any GIP unit in the first GIP cascade group fails. When any GIP cell in the first GIP cascaded set fails, each GIP cell in the first GIP cascaded set stops sending scan signals to the scan lines. Through the arrangement, the problem that the display device cannot normally display due to the failure of part of GIP units can be effectively avoided.

Description

Scanning drive circuit and display device

Technical Field

The invention relates to the field of display, in particular to a scanning driving circuit and a display device.

Background

With the continuous development of the TFT-LCD (Thin Film Transistor-Liquid Crystal Display) industry, the requirements of users for displays are higher and higher. The display with high product competitiveness has to have various advantages such as good quality, economy, practicality and the like. The realization of the advantages requires more processes.

In the implementation process of the above processes, a problem that the display device cannot normally display due to failure of a GIP (Gate IC in Panel) unit caused by static electricity, dust, exposure, and the like may occur.

Disclosure of Invention

Accordingly, the present invention is directed to a scan driving circuit and a display device, so as to effectively avoid the problem that the display device cannot normally display due to the failure of some GIP cells.

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

a scan driving circuit, comprising:

the first GIP cascade group comprises a plurality of GIP units in cascade connection and is used for respectively sending scanning signals to each scanning line in the pixel array substrate;

a second GIP cascade group including a plurality of cascade-connected GIP units for, when any GIP unit in the first GIP cascade group fails, replacing the first GIP cascade group to respectively send scan signals to each of the scan lines;

when any GIP unit in the first GIP cascaded group fails, each GIP unit in the first GIP cascaded group stops sending scanning signals to the scanning lines.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, the plurality of GIP units in the first GIP cascaded set and the second GIP cascaded set are respectively arranged according to a sequence, and each GIP unit includes:

the driving input end is used for receiving a driving signal output by the first signal line;

the scanning output end is used for sending scanning signals to the corresponding scanning lines;

a start-up input terminal for receiving a start-up signal output from a previous GIP unit connected thereto;

the starting output end is used for outputting a starting signal to the next GIP unit after outputting the scanning signal, so that the next GIP unit sends the scanning signal according to the driving signal after receiving the starting signal;

a reset input terminal for receiving a reset signal output by a connected next GIP unit;

a reset output terminal for outputting a reset signal to a previous GIP unit connected thereto after outputting a scan signal, so that the previous GIP unit stops transmitting the scan signal after receiving the reset signal;

in the first and second GIP cascaded groups, the plurality of GIP units are arranged in sequence, the start input end of the first GIP unit is used for receiving a start signal output by the second signal line, and the reset input end of the last GIP unit is used for receiving a reset signal output by the third signal line.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, in the first GIP cascaded set, a driving input terminal of each GIP unit is electrically connected to the first signal line, an open input terminal of a first GIP unit is electrically connected to the second signal line, and a reset input terminal of a last GIP unit is electrically connected to the third signal line;

in the second GIP cascaded group, a driving input end of each GIP unit is arranged corresponding to the first signal line in an insulated manner, a starting input end of the first GIP unit is arranged corresponding to the second signal line in an insulated manner, and a reset input end of the last GIP unit is arranged corresponding to the third signal line in an insulated manner.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, in the first GIP cascade group, a driving input terminal of each GIP unit is electrically connected to the first signal line through a first metal connection line, a start input terminal of the first GIP unit is electrically connected to the second signal line through a second metal connection line, and a reset input terminal of the last GIP unit is electrically connected to the third signal line through a third metal connection line;

the first metal connecting wire and the first signal wire are positioned in different layered structures, an insulating layer is arranged between the different layered structures, and the first metal connecting wire and the first signal wire are electrically connected with metal positioned in the first through hole through a first through hole formed in the insulating layer;

the second metal connecting wire and the second signal wire are positioned in different layered structures, an insulating layer is arranged between the different layered structures, and the second metal connecting wire and the second signal wire are electrically connected with metal positioned in the second through hole through a second through hole formed in the insulating layer;

the third metal connecting line and the third signal line are located in different layered structures, an insulating layer is arranged between the different layered structures, and the third metal connecting line and the third signal line are electrically connected with metal located in the third through hole through a third through hole formed in the insulating layer.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, when there is a failed GIP unit in the first GIP cascade group, the metal located in the first via, the metal located in the second via, and the metal located in the third via are fused to disconnect the electrical connection between the first metal connection line and the first signal line, the electrical connection between the second metal connection line and the second signal line, and the electrical connection between the third metal connection line and the third signal line.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, in the second GIP cascade group, a driving input terminal of each GIP unit is electrically connected to a first repair line extending to a corresponding position of the first signal line, an open input terminal of the first GIP unit is electrically connected to a second repair line extending to a corresponding position of the second signal line, and a reset input terminal of the last GIP unit is electrically connected to a third repair line extending to a corresponding position of the third signal line;

the first repairing line and the first signal line are positioned in different layered structures, and an insulating layer is arranged between the different layered structures, so that the first repairing line and the first signal line are arranged in an insulating manner;

the second repairing line and the second signal line are positioned in different layered structures, and an insulating layer is arranged between the different layered structures, so that the second repairing line and the second signal line are arranged in an insulating manner;

the third repairing line and the third signal line are located in different layered structures, and an insulating layer is arranged between the different layered structures, so that the third repairing line and the third signal line are arranged in an insulating manner.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, when there is a failed GIP cell in the first GIP cascade group, the driving input terminal of each GIP cell in the second GIP cascade group is electrically connected to the first signal line through the first repair line and the first signal line which are welded, the open input terminal of the first GIP cell in the second GIP cascade group is electrically connected to the second signal line through the second repair line and the second signal line which are welded, and the reset input terminal of the last GIP cell in the second GIP cascade group is electrically connected to the third signal line through the third repair line and the third signal line which are welded.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, in the first GIP cascade group, a reset output terminal of a first GIP unit is in a floating configuration, and a start output terminal of a last GIP unit is in a floating configuration;

in the second GIP cascade group, the reset output end of the first GIP unit is arranged in a suspended mode, and the starting output end of the last GIP unit is arranged in a suspended mode.

In a preferred option of the embodiment of the present invention, in the scan driving circuit, the scan driving circuit includes a plurality of second GIP cascaded sets.

On the basis, an embodiment of the present invention further provides a display device, including a pixel array substrate and the scan driving circuit, where the pixel array substrate includes a plurality of scan lines, and each scan line is electrically connected to one GIP unit in the first GIP cascaded set and one GIP unit in the second GIP cascaded set of the scan driving circuit.

According to the scanning driving circuit and the display device provided by the invention, the second GIP cascade group is arranged to replace the first GIP cascade group to send scanning signals to each scanning line when the first GIP cascade group has failed GIP units, so that the problem that the display device cannot normally display due to the failure of part of GIP units in the first GIP cascade group is avoided, the problems that the display device cannot normally display and needs to be remanufactured to cause high manufacturing cost and low manufacturing efficiency are further avoided, and the scanning driving circuit and the display device have extremely high economic characteristics.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is an electrical schematic diagram of a display device according to an embodiment of the present invention.

Fig. 2 is an electrical schematic diagram of a scan driving circuit according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of regions a1 and B1 in fig. 3.

Fig. 4 is an electrical schematic diagram of a GIP unit according to an embodiment of the present invention.

Fig. 5 is an electrical schematic diagram of a repaired scan driving circuit according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of regions a2 and B2 in fig. 5.

Icon: 10-a display device; 100-scan driving circuit; 110-first GIP cascaded set; 120-a second GIP cascaded set; a 131-GIP unit; 131 a-a drive input; 131 b-a scan output; 131 c-turn on input; 131 d-turn on output; 131 e-a reset input; 131 f-reset output; 141-first signal line; 143-a second signal line; 145-third signal line; 151-first metal connection lines; 153-second metal connecting lines; 155-third metal connecting line; 161-a first repair line; 163-a second repair line; 165-third repair line; 170-an insulating layer; 200-a pixel array substrate; 210-scan lines; 230-data lines; 250-pixel unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish one description from another, and are not to be construed as merely or implying relative importance.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, an embodiment of the invention provides a display device 10, which may include a scan driving circuit 100 and a pixel array substrate 200. The scan driving circuit 100 may include a first GIP cascade group 110 and a second GIP cascade group 120, and the pixel array substrate 200 may include a plurality of scan lines 210.

In detail, the first GIP cascaded set 110 may include a plurality of cascade-connected GIP units 131, and the second GIP cascaded set 120 may include a plurality of cascade-connected GIP units 131. Each scan line 210 is electrically connected to one GIP cell 131 in the first GIP cascaded set 110 and one GIP cell 131 in the second GIP cascaded set 120 to receive a scan signal transmitted by the first GIP cascaded set 110 or the second GIP cascaded set 120 to perform a scan operation.

Moreover, the pixel array substrate 200 may further include a plurality of data lines 230 and a plurality of pixel units 250. The data lines 230 and the scan lines 210 are arranged alternately to form a plurality of pixel regions, so as to form a display region. The plurality of pixel units 250 are arranged in an array in the display area, and one pixel unit 250 is disposed in each pixel area. Each pixel unit 250 in any row of pixel units 250 is electrically connected to one scan line 210, and each pixel unit 250 in any column of pixel units 250 is electrically connected to one data line 230.

With reference to fig. 2 and fig. 3, an embodiment of the invention further provides a scan driving circuit 100 applicable to the display device 10. Among them, the scan driving circuit 100 may include a first GIP cascade group 110 and a second GIP cascade group 120.

In detail, the first GIP cascade group 110 may include a plurality of cascade-connected GIP units 131 for respectively transmitting scan signals to the scan lines 210 in the pixel array substrate 200. The second GIP cascaded set 120 may include a plurality of cascade-connected GIP units 131, and is configured to transmit scan signals to the scan lines 210 instead of the first GIP cascaded set 110, respectively, when any GIP unit 131 in the first GIP cascaded set 110 fails. Moreover, when any GIP cell 131 in the first GIP cascade group 110 fails, each GIP cell 131 in the first GIP cascade group 110 stops sending scan signals to each scan line 210, so as to avoid that the non-failed GIP cell 131 in the first GIP cascade group 110 affects the operation of the scan line 210.

Through the above arrangement, the problem that the display device 10 cannot normally display due to the failure of one or more GIP units 131 in the first GIP cascade group 110 can be avoided, and further, the problems that the display device 10 cannot normally display and needs to be remanufactured, so that the manufacturing cost is high and the manufacturing efficiency is reduced are avoided, and the display device has extremely high economic characteristics.

The inventor found in the research process that when there is a failed GIP unit 131 in the first GIP cascade group 110, if a scheme of replacing with a separately arranged redundant GIP unit is adopted, each GIP unit 131 needs to be checked one by one to determine a specific position of the failed GIP unit 131, and then the redundant GIP unit replaces the failed GIP unit 131 through a corresponding process based on the determined position.

Also, the inventors have also found that, when a scheme of separately providing one redundant GIP unit is adopted, the redundant GIP unit needs to be provided at the head end (a position near the first GIP unit 131) or the tail end (a position near the last GIP unit 131) of the first GIP cascaded set 110. In this case, if the failed GIP cell 131 is located far away from the redundant GIP cell (e.g., at the middle position), after the redundant GIP cell replaces the failed GIP cell 131, the signal transmission loss will be large due to the long trace between the redundant GIP cell and the scan line 210, and the driving of the scan line 210 will be affected.

Based on the above analysis, it can be known that, by adopting the scheme in this embodiment that the second cascaded set including the plurality of GIP units 131 is used to replace the first GIP cascaded set 110 to send the scan signals to the scan lines 210, on one hand, the problem that the specific position of the failed GIP unit 131 needs to be searched, which results in higher labor cost or more complex process, can be avoided, and on the other hand, the problem that the loss of signal transmission is large due to longer routing between the redundant GIP unit and the scan lines 210 can be avoided.

Further, in this embodiment, in the first GIP cascade group 110 and the second GIP cascade group 120, the plurality of GIP units 131 may be arranged according to a sequence order. And, after being arranged according to the order, the relationship between the GIP units 131 is not limited, and may be set according to the type of the GIP unit 131. For example, the number of ports per GIP unit 131 may be different according to the type of GIP, and the relationship between the GIP units 131 may be different based on the difference of the number of ports.

In detail, the corresponding port number may be 6, 7, 8, 10, and others, depending on the type of the GIP unit 131. In the present embodiment, in an alternative example, in combination with fig. 4, each GIP unit 131 may have 6 ports, which are a driving input terminal 131a, a scanning output terminal 131b, an enabling input terminal 131c, an enabling output terminal 131d, a reset input terminal 131e, and a reset output terminal 131 f.

The driving input terminal 131a is configured to receive a driving signal output by the first signal line 141. The scan output end 131b is used for sending a scan signal to the corresponding scan line 210. The turn-on input terminal 131c is used to receive a turn-on signal output from the connected previous GIP unit 131. The start output terminal 131d is configured to output a start signal to a subsequent GIP unit 131 connected thereto after outputting a scan signal, so that the subsequent GIP unit 131 sends the scan signal according to the driving signal after receiving the start signal. The reset input terminal 131e is used for receiving a reset signal output by the connected following GIP unit 131. The reset output terminal 131f is configured to output a reset signal to a previous GIP unit 131 connected thereto after outputting a scan signal, so that the previous GIP unit 131 stops sending the scan signal after receiving the reset signal.

In the first and second GIP cascaded

groups

110 and 120, the on input terminal 131c of the first GIP unit 131 is configured to receive an on signal output by the second signal line 143, and the reset input terminal 131e of the last GIP unit 131 is configured to receive a reset signal output by the third signal line 145.

That is, after the first GIP unit 131 receives the on signal output from the second signal line 143, it may output a scan signal to the corresponding scan line 210 according to the driving signal output from the first signal line 141. After the first GIP unit 131 outputs the scan signal, an on signal may be output to the second GIP unit 131, so that the second GIP unit 131 may output the scan signal to the corresponding scan line 210 according to the driving signal output from the first signal line 141 after receiving the on signal. Also, after the second GIP cell 131 outputs the scan signal, a reset signal may be output to the first GIP cell 131 to stop the first GIP cell 131 from outputting the scan signal to the corresponding scan line 210. In this manner, the scan signal can be sequentially output to each scan line 210. Wherein, after the last GIP cell 131 outputs the scan signal, the third signal line 145 may output a reset signal to the last GIP cell 131, so that the last GIP cell 131 may stop outputting the scan signal to the corresponding scan line 210 based on the reset signal. Through the above-described process, the scanning operation of one cycle can be completed by each scanning line 210.

In addition, in the first and second GIP cascaded

groups

110 and 120, considering that the first GIP unit 131 does not need to output a reset signal and the last GIP unit 131 does not need to output a start signal, in this embodiment, the reset output terminal 131f of the first GIP unit 131 may be set in a floating manner and the start output terminal 131d of the last GIP unit 131 may be set in a floating manner.

Further, it is considered that the second GIP cascade group 120 does not need to transmit a scan signal to each scan line 210 when there is no failed GIP cell 131 in the first GIP cascade group 110. Accordingly, the connection relationships between the first and second

GIP cascade groups

110 and 120 and the first, second, and

third signal lines

141, 143, and 145 may be different.

In detail, in an alternative example, in the first GIP cascade group 110, the driving input terminal 131a of each GIP cell 131 is electrically connected to the first signal line 141, the turn-on input terminal 131c of the first GIP cell 131 is electrically connected to the second signal line 143, and the reset input terminal 131e of the last GIP cell 131 is electrically connected to the third signal line 145. In the second GIP cascade group 120, the driving input terminal 131a of each GIP unit 131 is insulated from and correspondingly disposed to the first signal line 141, the start input terminal 131c of the first GIP unit 131 is insulated from and correspondingly disposed to the second signal line 143, and the reset input terminal 131e of the last GIP unit 131 is insulated from and correspondingly disposed to the third signal line 145.

With the above arrangement, signals of the first signal line 141, the second signal line 143, and the third signal line 145 can be transmitted only to the first GIP cascaded set 110, so that each GIP unit 131 in the first GIP cascaded set 110 can sequentially transmit a scan signal to the corresponding scan line 210. Also, the signals of the first signal line 141, the second signal, and the third signal line 145 may not be transmitted to the second GIP cascaded set 120, so that each GIP cell 131 in the second GIP cascaded set 120 cannot transmit a scan signal to the corresponding scan line 210.

The above-mentioned insulation-corresponding arrangement means that the two objects are respectively located in different layered structures and are not electrically connected, but projections of the two objects, which are insulation-corresponding arrangement, on the same plane have an intersection point.

Further, in the first GIP cascaded set 110, the driving input terminal 131a of each GIP cell 131 may be electrically connected to the first signal line 141 through a first metal connection line 151, the start input terminal 131c of a first GIP cell 131 may be electrically connected to the second signal line 143 through a second metal connection line 153, and the reset input terminal 131e of a last GIP cell 131 may be electrically connected to the third signal line 145 through a third metal connection line 155.

In detail, the first metal connection line 151 and the first signal line 141 are located in different layered structures, an insulating layer 170 is disposed between the different layered structures, and the first metal connection line 151 and the first signal line 141 are electrically connected through a first via hole formed in the insulating layer 170 and a metal located in the first via hole. The second metal connection line 153 and the second signal line 143 are located in different layered structures, an insulating layer 170 is disposed between the different layered structures, and the second metal connection line 153 and the second signal line 143 are electrically connected through a second via hole formed in the insulating layer 170 and a metal located in the second via hole. The third metal connection line 155 and the third signal line 145 are located in different layered structures, an insulating layer 170 is disposed between the different layered structures, and the third metal connection line 155 and the third signal line 145 are electrically connected through a third through hole formed in the insulating layer 170 and a metal located in the third through hole.

That is, each metal connection line and each signal line are located in different layered structures, and an insulating layer 170 is provided between the different layered structures, and each metal connection line and each signal line are electrically connected through a via hole opened in the insulating layer 170 and a metal located in the via hole.

The metal connection lines and the signal lines are not limited by the way of electrically connecting the through holes formed in the insulating layer 170 and the metal located in the through holes, and may be arranged according to the actual application requirements.

For example, in one possible example, each metal connection line and each signal line may be disposed in different layered structures, and then an insulating plate provided with a through hole filled with metal is disposed between the different layered structures, so that each metal connection line and each signal line are electrically connected through the metal at the through hole.

For another example, in another possible example, the metal connection lines and the signal lines may be arranged in different layered structures, the insulating layer 170 is arranged between the different layered structures, and then laser is applied to the relative positions of the metal connection lines and the signal lines to melt the insulating layer 170 to form a through hole, and the molten metal connection lines flow to the signal lines through the through hole, so that the metal connection lines and the signal lines are electrically connected.

Further, it is considered that when there is a failed GIP cell 131 in the first GIP cascade group 110, it is required that each GIP cell 131 in the first GIP cascade group 110 stops transmitting the scan signal to each of the scan lines 210. Therefore, in this embodiment, in combination with fig. 5 and 6, when there is a failed GIP unit 131 in the first GIP cascade group 110, the metal located in the first via, the metal located in the second via, and the metal located in the third via can be fused by the action of the laser to disconnect the electrical connection between the first metal connection line 151 and the first signal line 141, the electrical connection between the second metal connection line 153 and the second signal line 143, and the electrical connection between the third metal connection line 155 and the third signal line 145.

That is, the above-mentioned blowing operation may disable the signals output from the first, second, and

third signal lines

141, 143, and 145 from being transmitted to the first GIP cascade group 110, so that each GIP cell 131 in the first GIP cascade group 110 stops sending scan signals to the scan lines 210.

Further, in the second GIP cascade group 120, the driving input terminal 131a of each GIP cell 131 may be electrically connected to the first repair line 161 extended to a position corresponding to the first signal line 141, the turn-on input terminal 131c of the first GIP cell 131 may be electrically connected to the second repair line 163 extended to a position corresponding to the second signal line 143, and the reset input terminal 131e of the last GIP cell 131 may be electrically connected to the third repair line 165 extended to a position corresponding to the third signal line 145.

In detail, the first repair line 161 and the first signal line 141 are located in different layered structures, and an insulating layer 170 is disposed between the different layered structures, so that the first repair line 161 and the first signal line 141 are disposed in an insulating manner. The second repair line 163 and the second signal line 143 are located in different layered structures, and an insulating layer 170 is disposed between the different layered structures, so that the second repair line 163 and the second signal line 143 are disposed in an insulating manner. The third repair line 165 and the third signal line 145 are located in different layered structures, and an insulating layer 170 is disposed between the different layered structures, so that the third repair line 165 and the third signal line 145 are disposed in an insulating manner.

Further, considering that there is a failed GIP cell 131 in the first GIP cascaded set 110, it is required that each GIP cell 131 in the second GIP cascaded set 120 sends a scan signal to each scan line 210 instead of the first GIP cascaded set 110, respectively. Therefore, in the present embodiment, when there is a failed GIP cell 131 in the first GIP cascade group 110, the driving input terminal 131a of each GIP cell 131 in the second GIP cascade group 120 is electrically connected to the first signal line 141 through the fused first repair line 161 and the first signal line 141, the open input terminal 131c of the first GIP cell 131 in the second GIP cascade group 120 is electrically connected to the second signal line 143 through the fused second repair line 163 and the second signal line 143, and the reset input terminal 131e of the last GIP cell 131 in the second GIP cascade group 120 is electrically connected to the third signal line 145 through the fused third repair line 165 and the third signal line 145.

That is, when there is a failed GIP cell 131 in the first GIP cascade group 110, the first repair line 161 and the first signal line 141 may be fused by the action of laser light to electrically connect the driving input terminal 131a of each GIP cell 131 in the second GIP cascade group 120 with the first signal line 141. The second repair line 163 may be fused to the second signal line 143 by the laser to electrically connect the open input terminal 131c of the first GIP cell 131 in the second GIP cascade group 120 to the second signal line 143. The third repair line 165 may be also fused to the third signal line 145 by the action of laser light to electrically connect the reset input terminal 131e of the last GIP cell 131 in the second GIP cascade group 120 to the third signal line 145.

The manner of welding the first repairing line 161 and the first signal line 141, the second repairing line 163 and the second signal line 143, and the third repairing line 165 and the third signal line 145 may refer to the explanation of the electrical connection between the first metal connection line 151 and the first signal line 141, the electrical connection between the second metal connection line 153 and the second signal line 143, and the electrical connection between the third metal connection line 155 and the third signal line 145, which is not described herein again.

Optionally, the number of the second GIP cascaded sets 120 is not limited, and may be set according to practical application requirements, for example, one or more than one. In this embodiment, there may be a plurality of second GIP cascaded sets 120 to further improve the reliability and stability of the scan driving circuit 100.

Wherein, in the plurality of second GIP cascaded groups 120, each second GIP cascaded group 120 is arranged in the same manner. When there is a failed GIP unit 131 in the first GIP cascade group 110, any one second GIP cascade group 120 among the plurality of second GIP cascade groups 120 may be selected to transmit a scan signal to each scan line 210 instead of the first GIP cascade group 110.

Also, when there is a failed GIP cell 131 in the selected second GIP cascade group 120, one second GIP cascade group 120 may be selected from the other second GIP cascade groups 120 instead of the selected second GIP cascade group 120 to transmit a scan signal to each scan line 210.

In summary, in the scan driving circuit 100 and the display device 10 provided by the present invention, the second GIP cascade group 120 is arranged to replace the first GIP cascade group 110 to send the scan signal to each scan line 210 when the first GIP cascade group 110 has the failed GIP unit 131, so as to avoid the problem that the display device 10 cannot normally display due to the failure of a part of GIP units 131 in the first GIP cascade group 110, and further avoid the problem that the display device 10 cannot normally display and needs to be remanufactured to reduce the manufacturing cost and the manufacturing efficiency, and have an extremely high economic characteristic.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A scan driving circuit, comprising:

when any GIP unit in the first GIP cascaded group fails, stopping sending scanning signals to the scanning lines by each GIP unit in the first GIP cascaded group;

the plurality of GIP units in the first GIP cascade group and the second GIP cascade group are arranged according to a sequence, and each GIP unit includes: the driving input end is used for receiving a driving signal output by the first signal line; the scanning output end is used for sending scanning signals to the corresponding scanning lines; a start-up input terminal for receiving a start-up signal output from a previous GIP unit connected thereto; the starting output end is used for outputting a starting signal to the next GIP unit after outputting the scanning signal, so that the next GIP unit sends the scanning signal according to the driving signal after receiving the starting signal; a reset input terminal for receiving a reset signal output by a connected next GIP unit; a reset output terminal for outputting a reset signal to a previous GIP unit connected thereto after outputting a scan signal, so that the previous GIP unit stops transmitting the scan signal after receiving the reset signal; in the first and second GIP cascaded groups, the plurality of GIP units are arranged in sequence, the start input end of the first GIP unit is used for receiving a start signal output by the second signal line, and the reset input end of the last GIP unit is used for receiving a reset signal output by the third signal line;

in the first GIP cascade group, the driving input end of each GIP unit is electrically connected with the first signal line through a first metal connecting line, the starting input end of the first GIP unit is electrically connected with the second signal line through a second metal connecting line, the reset input end of the last GIP unit is electrically connected with the third signal line through a third metal connecting line, and when a failed GIP unit exists in the first GIP cascade group, the electric connection between the first metal connecting line and the first signal line is broken, the electric connection between the second metal connecting line and the second signal line is broken, and the electric connection between the third metal connecting line and the third signal line is broken;

in the second GIP cascade group, the driving input end of each GIP unit is electrically connected with a first repairing line extending to the corresponding position of the first signal line, the opening input end of the first GIP unit is electrically connected with a second repairing line extending to the corresponding position of the second signal line, the resetting input end of the last GIP unit is electrically connected with a third repairing line extending to the corresponding position of the third signal line, and when a failed GIP unit exists in the first GIP cascade group, the first repairing line is electrically connected with the first signal line, the second repairing line is electrically connected with the second signal line, and the third repairing line is electrically connected with the third signal line.

2. The scan driving circuit according to claim 1, wherein the first metal connecting line and the first signal line are located in different layered structures, and an insulating layer is disposed between the different layered structures, and the first metal connecting line and the first signal line are electrically connected through a first via hole formed in the insulating layer and a metal located in the first via hole;

3. The scan driving circuit of claim 2, wherein when there is a failed GIP cell in the first GIP cascade group, the metal in the first via hole, the metal in the second via hole, and the metal in the third via hole are blown to disconnect the electrical connection between the first metal connection line and the first signal line, the electrical connection between the second metal connection line and the second signal line, and the electrical connection between the third metal connection line and the third signal line.

4. The scan driving circuit according to claim 1, wherein the first repair line and the first signal line are located in different layered structures with an insulating layer provided therebetween to insulate the first repair line from the first signal line;

5. The scan driving circuit of claim 4, wherein when there is a failed GIP cell in the first GIP cascade group, the driving input terminal of each GIP cell in the second GIP cascade group is electrically connected to the first signal line through the first repair line and the first signal line which are welded, the open input terminal of a first GIP cell in the second GIP cascade group is electrically connected to the second signal line through the second repair line and the second signal line which are welded, and the reset input terminal of a last GIP cell in the second GIP cascade group is electrically connected to the third signal line through the third repair line and the third signal line which are welded.

6. The scan driving circuit of claim 1, wherein in the first GIP cascade group, a reset output terminal of a first GIP cell is set in a floating manner, and an on output terminal of a last GIP cell is set in a floating manner;

7. The scan driving circuit according to any one of claims 1 to 6, comprising a plurality of the second GIP cascaded sets.

8. A display device comprising a pixel array substrate and the scan driving circuit of any one of claims 1 to 7, wherein the pixel array substrate comprises a plurality of scan lines, each scan line being electrically connected to one GIP cell in the first GIP cascaded set and one GIP cell in the second GIP cascaded set of the scan driving circuit.