Display device and repairing method thereof

Abstract

The application discloses a display device and a repairing method thereof, wherein the display device comprises: a plurality of first gate driving circuits; at least one second gate driving circuit, which is arranged in correspondence with at least one of the first gate driving circuit at the frontmost M level and the first gate driving circuit at the last N level; a detection module, which is connected with the first gate driving circuit corresponding to the second gate driving circuit, and is used for detecting the state of the first gate driving circuit and outputting a detection signal; and a first control module, which is connected with the detection module, and is used for determining, according to the detection signal, whether the first gate driving circuit corresponding to the second gate driving circuit is abnormal, and controlling the second gate driving circuit to replace the abnormal first gate driving circuit to work. The application can detect whether the output of the first gate driving circuit at the upper and lower edges of the display panel is abnormal in real time, and repair the display device.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display device and a method for repairing it. Background Technology

[0002] GIP (Gate in Panel) technology refers to the technology of directly integrating gate driving circuits on the glass substrate of the display panel. The gate driving circuits are located on the left and right edges of the display panel and are cascaded. This technology is different from the traditional external IC driving method. By integrating the gate driving circuit inside the panel, a narrow bezel design can be achieved and production costs can be reduced.

[0003] The gate drive circuit located at the top and bottom edges of the display panel is susceptible to electrostatic discharge (ESD), which can cause the gate drive circuit to malfunction. Summary of the Invention

[0004] This invention provides a display device and its repair method to solve the problem that the gate driving circuits at the top and bottom edges of the display panel are easily affected by ESD, causing them to malfunction.

[0005] In a first aspect, the present invention provides a display device, wherein the display device comprises:

[0006] Multiple first gate drive circuits are cascaded together.

[0007] At least one second gate driving circuit is configured to correspond to at least one of the first gate driving circuit of the first M stages and the last first gate driving circuit of the N stages, serving as a backup of the corresponding first gate driving circuit; wherein M is an integer greater than or equal to 1 and N is an integer greater than or equal to 1.

[0008] The detection module is connected to the first gate driving circuit corresponding to the second gate driving circuit. The detection module is used to detect the state of the first gate driving circuit and output a detection signal.

[0009] The first control module is connected to the detection module. The first control module is used to control the second gate drive circuit to replace the abnormal first gate drive circuit when the first gate drive circuit corresponding to the second gate drive circuit is abnormal according to the detection signal.

[0010] Optionally, the display device further includes at least one first switch module and at least one second switch module;

[0011] The first switch module is connected between the output terminal of the first gate drive circuit and the gate line, and the second switch module is connected between the output terminal of the second gate circuit and the gate line.

[0012] The first control module is used to control the on or off state of the first switch module and the second switch module;

[0013] Preferably, the first switching module includes a first transistor, and the second switching module includes a second transistor;

[0014] The first terminal of the first transistor is connected to the output terminal of the first gate driving circuit, the second terminal of the first transistor is connected to the gate line, and the control terminal of the first transistor is connected to the first control module; the first terminal of the second transistor is connected to the output terminal of the second gate circuit, the second terminal of the second transistor is connected to the gate line, and the control terminal of the second transistor is connected to the first control module.

[0015] Optionally, the first control module is used to control the first switch module to turn off and the second switch module to turn on when the first gate drive circuit corresponding to the second gate drive circuit is abnormal according to the detection signal; the first control module is used to control the first switch module to turn on and the second switch module to turn off when the first gate drive circuit corresponding to the second gate drive circuit is normal according to the detection signal.

[0016] Optionally, the first control module includes: a judgment unit and a response unit;

[0017] The judgment unit is connected to the detection module. The judgment unit is used to determine whether the first gate driving circuit corresponding to the second gate driving circuit is abnormal based on the detection signal, and outputs a judgment signal.

[0018] The response unit is connected to the judgment unit. The response unit is used to control the second gate drive circuit to replace the abnormal first gate drive circuit when the judgment signal determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal.

[0019] Optionally, the display device includes a display driver chip; the display driver chip includes a detection module and a first control module, the first control module is further configured to rewrite the value of the status register of the display driver chip when it is determined from the detection signal that the first gate driving circuit corresponding to the second gate driving circuit is abnormal.

[0020] Optionally, the detection module includes: an input storage unit, an operational amplifier, and an output storage unit;

[0021] The first terminal of the input storage unit is connected to the output terminal of the first gate driving circuit corresponding to the second gate driving circuit, the second terminal of the input storage unit is connected to a reference voltage, and the third terminal of the input storage unit is connected to the first terminal of the output storage unit; the input storage unit is used to store the output voltage of the first gate driving circuit corresponding to the second gate driving circuit.

[0022] The second terminal of the output storage unit is connected to the inverting input terminal of the operational amplifier, and the third terminal of the output storage unit is connected to the output terminal of the operational amplifier; the output storage unit is used to store the voltage of the input storage unit.

[0023] The non-inverting input of the operational amplifier is connected to a reference voltage, and the output of the operational amplifier is connected to the first control module; the operational amplifier is used to output a detection signal.

[0024] Optionally, the input storage unit includes a first switching unit and a first capacitor; the output storage unit includes a second switching unit and a second capacitor; and the display device further includes a second control module.

[0025] The first terminal of the first switching unit is connected to the output terminal of the first gate driving circuit corresponding to the second gate driving circuit, the second terminal of the first switching unit is connected to the first terminal of the first capacitor, and the control terminal of the first switching unit is connected to the second control module; the second control module is used to control the first switching unit to be turned on or off.

[0026] The first terminal of the first capacitor is also connected to the first terminal of the second switching unit, and the second terminal of the first capacitor is connected to the reference voltage.

[0027] The second terminal of the second switching unit is connected to the first terminal of the second capacitor and also to the inverting input terminal of the operational amplifier. The control terminal of the second switching unit is connected to the second control module. The second control module is also used to control the second switching unit to be turned on or off.

[0028] The second terminal of the second capacitor is connected to the output terminal of the operational amplifier.

[0029] Secondly, the present invention provides a method for repairing a display device, the display device comprising a plurality of first gate driving circuits; at least one second gate driving circuit, corresponding to at least one of the first gate driving circuit of the first Mth stage and the last gate driving circuit of the Nth stage; a detection module, the detection module being connected to the first gate driving circuit corresponding to the second gate driving circuit; the detection module being used to detect the state of the first gate driving circuit and output a detection signal; and a first control module, the first control module being connected to the detection module.

[0030] Repair methods include:

[0031] When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and start working.

[0032] Optionally, the display device further includes at least one first switch module and at least one second switch module; the first switch module is connected between the output terminal of the first gate drive circuit and the gate line, and the second switch module is connected between the output terminal of the second gate circuit and the gate line;

[0033] When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and take over operation, including:

[0034] When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the first switch module to turn off and controls the second switch module to turn on.

[0035] Optionally, the first control module includes a judgment unit and a response unit; the judgment unit is connected to the detection module, and the response unit is connected to the judgment unit.

[0036] When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and take over operation, including:

[0037] The judgment unit determines whether the first gate driving circuit corresponding to the second gate driving circuit is abnormal based on the detection signal, and outputs a judgment signal.

[0038] When the response unit determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the judgment signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and start working.

[0039] In the technical solution of this embodiment of the invention, at least one of the first gate driving circuits at the first M stages and the last N stages is correspondingly provided with a second gate driving circuit. The second gate driving circuit can serve as a backup for the corresponding first gate driving circuit. The detection module can detect the state of the first gate driving circuit and output a detection signal. When the first control module determines that the first gate driving circuit corresponding to the second gate driving circuit is abnormal based on the detection signal, it controls the second gate driving circuit to replace the abnormal first gate driving circuit and take over operation. In the technical solution of this embodiment of the invention, the detection module can detect in real time whether the output of the first gate driving circuit at the top and bottom edges of the display panel is abnormal. When the first gate driving circuit is affected by ESD and its output is abnormal, the first control module controls the second gate driving circuit to replace the abnormal first gate driving circuit and take over operation, thereby repairing the display device and ensuring that when the first gate driving circuit is affected by ESD, the pixels in each row can also receive normal gate driving signals, and the entire operation of the display panel will not be affected.

[0040] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a gate drive circuit provided by related technologies;

[0043] Figure 2 This is a schematic diagram of a pixel circuit structure provided by related technologies;

[0044] Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of another display device provided in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention;

[0048] Figure 7 This is a flowchart of a repair method for a display device provided in an embodiment of the present invention;

[0049] Figure 8 This is a flowchart of another method for repairing a display device provided in an embodiment of the present invention;

[0050] Figure 9 This is a flowchart of another driving method for a display device provided in an embodiment of the present invention. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] Figure 1 This is a schematic diagram of a gate drive circuit provided by related technologies, such as... Figure 1As shown, the first terminal of the third transistor M1 is connected to the input signal EIN, the control terminal of the third transistor M1 is connected to the first clock signal line ECK1, the second terminal of the third transistor M1 is connected to the control terminal of the fourth transistor M2, the first terminal of the fourth transistor M2 is connected to the first clock signal line ECK1, and the second terminal of the fourth transistor M2 is connected to the second terminal of the fifth transistor M3. The first terminal of the fifth transistor M3 is connected to the first level signal VGL. The control terminal of the fifth transistor M3 is connected to the first clock signal line ECK1. The second terminal of the fifth transistor M3 is connected to the first terminal of the fifteenth transistor M13. The control terminal of the fifteenth transistor M13 is connected to the first level signal VGL. The second terminal of the fifteenth transistor M13 is connected to the first terminal of the fourteenth transistor M12. The control terminal of the fourteenth transistor M12 is connected to the first level signal VGL. The second terminal of the fourteenth transistor M12 is connected to the control terminal of the sixth transistor M4. The first terminal of the sixth transistor M4 is connected to the second level signal VGH. The second terminal of the sixth transistor M4 is connected to the first terminal of the seventh transistor M5. The control terminal of the seventh transistor M5 is connected to the second clock signal line ECK2. The second terminal of the seventh transistor M5 is connected to the second terminal of the third transistor M1. The control terminal of the tenth transistor M8 is connected to the second terminal of the fifteenth transistor M13. The first terminal of the tenth transistor M8 is connected to the second clock signal line ECK2. The second terminal of the tenth transistor M8 is connected to the first terminal of the ninth transistor M7. The third capacitor C3 is connected between the control terminal and the second terminal of the tenth transistor M8. The control terminal of the ninth transistor M7 is connected to the second clock signal line ECK2. The second terminal of the ninth transistor M7 is connected to the control terminal of the eleventh transistor M9. The first terminal of the eighth transistor M6 is connected to the second terminal of the ninth transistor M7. The second terminal of the eighth transistor M6 is connected to the second level signal VGH. The control terminal of the eighth transistor M6 is connected to the first terminal of the thirteenth transistor M11. The control terminal of the thirteenth transistor M11 is connected to the first level signal VGL. The second terminal of the thirteenth transistor M11 is connected to the control terminal of the twelfth transistor M10. The first terminal of the eleventh transistor M9 is connected to the second level signal VGH. The second terminal of the eleventh transistor M9 is connected to the first terminal of the twelfth transistor M10 and serves as the output terminal of the gate drive circuit 1, outputting the gate drive signal Eout. The second terminal of the twelfth transistor M10 is connected to the first level signal VGL. The fourth capacitor C4 is connected between the control terminal of the twelfth transistor M10 and the second clock signal line ECK2. The fifth capacitor C5 is connected between the control terminal and the first terminal of the eleventh transistor M9. The third transistor M1 to the fifteenth transistor M13 in the gate drive circuit 1 can all be P-type transistors.

[0054] The output of gate drive circuit 1 is connected to the gate lines of the display area. The gate lines located at the top and bottom edges of the display area are more susceptible to ESD, causing electrostatic discharge (ESD) to easily couple and damage the eleventh transistor M9 and the twelfth transistor M10 at the top and bottom edges of the display panel. This results in a reduction in the equivalent channel width W of the eleventh transistor M9 and the twelfth transistor M10, further reducing their conduction capability. The transistor's on-state current I... ds The calculation formula is as follows:

[0055]

[0056] Where W is the channel width of the transistor, L is the channel length of the transistor, u is the carrier mobility, and C is the channel width of the transistor. ox V is the gate oxide capacitance of the transistor. gs V is the voltage between the gate and source of a transistor. ds V is the voltage between the drain and source of a transistor. th This is the threshold voltage of the transistor.

[0057] As can be seen from the above calculation formula, the reduced equivalent channel width W of the eleventh transistor M9 and the twelfth transistor M10 will lead to a decrease in the on-current I of the eleventh transistor M9 and the twelfth transistor M10. ds The smaller the voltage, the lower the output voltage of the gate drive circuit 1, or even the absence of output.

[0058] Figure 2 This is a schematic diagram of a pixel circuit provided by related technologies. The gate drive signal output by the gate drive circuit can be connected to the control terminal of the transistor in the pixel circuit. For example... Figure 2The sixteenth transistor M14 has its first terminal connected to the data voltage signal Vdata, its control terminal connected to the second scan signal Scan2, its second terminal connected to the first terminal of the seventeenth transistor M15, its second terminal connected to the first power supply signal VDD, and its control terminal connected to the light emission control signal EM. The eighteenth transistor M16 has its first terminal connected to the second terminal of the sixteenth transistor M14, its second terminal connected to the first terminal of the twentieth transistor M18, its control terminal connected to the light emission control signal EM, and its second terminal connected to the anode of the light-emitting diode (OLED). The cathode of the OLED is connected to the second power supply signal VSS. The nineteenth transistor M17 has its first terminal connected to the control terminal of the eighteenth transistor M16, its second terminal connected to the first terminal of the twenty-first transistor M19, and its second terminal connected to the first terminal of the twentieth transistor M18. The control terminals of both the nineteenth and twenty-first transistors are connected to the second scan signal Scan2. The first terminal of the 24th transistor M22 is connected to the anode of the OLED, and the second terminal of the 24th transistor M22 is connected to the initialization signal Vref. The control terminal of the 24th transistor M22 is connected to the first scan signal Scan1. The first terminal of the 22nd transistor M20 is connected to the second terminal of the 24th transistor M22. The control terminals of the 22nd transistor M20 and the 23rd transistor M21 are connected to the first scan signal Scan1. The second terminal of the 22nd transistor M20 is connected to the first terminal of the 23rd transistor M21. The first terminal of the sixth capacitor C6 is connected to the first power supply signal VDD, and the second terminal of the sixth capacitor C6 is connected to the second terminal of the 23rd transistor M21. The 17th transistor M15 to the 24th transistor M22 in pixel circuit 2 can all be P-type transistors.

[0059] like Figure 1 and Figure 2 As shown, Figure 1 The gate drive signal Eout output from the output terminal of the provided gate drive circuit 1 can be Figure 2 The light emission control signal EM in the middle can also be used for Figure 2The first scan signal Scan1 or the second scan signal Scan2 in the circuit, for example, the output terminal of the gate drive circuit 1 is connected to the gate line, and the control terminals of the twentieth transistor M18 and the seventeenth transistor M15 are connected to the gate line. During the waiting period from power-on to the display stage, the gate drive signal Eout output by the output terminal of the gate drive circuit 1 is the second-level signal VGH. At this time, the first power supply signal VDD and the second power supply signal VSS have been output normally. If the voltage of the second-level signal VGH output by the gate drive circuit 1 decreases due to static electricity, the seventeenth transistor M15 and the twentieth transistor M18 will be slightly turned on, and the control terminal of the eighteenth transistor M16 will be in a floating state. It is easy for it to also be in a slightly turned-on state due to coupling, thereby causing the light-emitting diode OLED to emit light during the waiting period, resulting in abnormal operation of the pixel circuit 2.

[0060] In view of the above, the embodiments of the present invention provide the following technical solutions:

[0061] Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, such as... Figure 3 As shown, the display device includes: a plurality of first gate driving circuits 11, which are cascaded together. At least one second gate driving circuit 12 is configured to correspond to at least one of the first M-stage first gate driving circuits 11 and the last N-stage first gate driving circuits 11, serving as a backup for the corresponding first gate driving circuit 11. Here, M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1. A detection module 3 is connected to the first gate driving circuit 11 corresponding to the second gate driving circuit 12. The detection module 3 is used to detect the state of the first gate driving circuit 11 and output a detection signal. A first control module 4 is connected to the detection module 3. The first control module 4 is used to control the second gate driving circuit 12 to replace the abnormal first gate driving circuit 11 and take over operation when the detection signal determines that the first gate driving circuit 11 corresponding to the second gate driving circuit 12 is abnormal.

[0062] Specifically, the display device includes a display panel, which may include a display area 10 and a non-display area 20. The display area 10 may be provided with an array of pixels, and the non-display area 20 may be provided with a plurality of cascaded first gate driving circuits 11 and at least one second gate driving circuit 12. The plurality of cascaded first gate driving circuits 11 and at least one second gate driving circuit 12 may output gate driving signals, which may be transmitted to the gate lines connected to each row of pixels to drive the pixels of the display panel to work row by row.

[0063] The first gate driving circuit 11, cascaded in M ​​stages at the upper edge of the display panel, can be correspondingly provided with a second gate driving circuit 12. Similarly, the first gate driving circuit 11, cascaded in N stages at the lower edge of the display panel, can also be correspondingly provided with a second gate driving circuit 12. For example, such as... Figure 3 As shown, the first gate driving circuit 11 of the first stage located at the upper edge of the display panel can be correspondingly provided with a second gate driving circuit 12, and the first gate driving circuit 11 of the last stage located at the lower edge of the display panel can be correspondingly provided with a second gate driving circuit 12, that is, M and N are both equal to 1. In some embodiments of the present invention, M and N can be integers greater than 1. For example, the first three stages of the first gate driving circuit 11 located at the upper edge of the display panel can be correspondingly provided with a second gate driving circuit 12, and the last three stages of the first gate driving circuit 11 located at the lower edge of the display panel can be correspondingly provided with a second gate driving circuit 12. In other embodiments of the present invention, the second gate driving circuit 12 can be correspondingly provided only in the last N cascaded first gate driving circuits 11 located at the lower edge of the display panel, in which case N can be equal to 1 or an integer greater than 1.

[0064] The gate drive signals output by the first gate drive circuit 11 and its corresponding second gate drive circuit 12 are the same, and both transmit the gate drive signals to the same gate line. The circuit structure and connection relationship of the second gate drive circuit 12, which corresponds to the first gate drive circuit 11, are identical to those of the first gate drive circuit 11. (Continue to refer to...) Figure 3 The connection relationship between the last stage's first gate drive circuit 11 and its corresponding second gate drive circuit 12 will be used as an example for explanation:

[0065] The final stage first gate driving circuit 11 is correspondingly provided with a second gate driving circuit 12. The final stage first gate driving circuit 11 is connected to the first clock signal line ECK1 and the second clock signal line ECK2, and is connected to the first level signal VGL and the second level signal VGH. The final stage first gate driving circuit 11 is also connected to the output terminal of the previous stage first gate driving circuit 11. The output of the previous stage first gate driving circuit 11 serves as the start signal of the final stage first gate driving circuit 11, and the output terminal of the final stage first gate driving circuit 11 is also connected to the previous stage first gate driving circuit 11. The output of the final stage first gate driving circuit 11 serves as the reset signal of the previous stage first gate driving circuit 11. Therefore, the second gate driving circuit 12, corresponding to the final stage first gate driving circuit 11, is also connected to the first clock signal line ECK1 and the second clock signal line ECK2, and is connected to the first level signal VGL and the second level signal VGH. It is also connected to the output terminal of the previous stage first gate driving circuit 11, and the output terminal of the second gate driving circuit 12, corresponding to the final stage first gate driving circuit 11, is also connected to the previous stage first gate driving circuit 11.

[0066] The display device may further include a detection module 3 and a first control module 4. The output terminals of the first gate driving circuit 11, which is correspondingly equipped with a second gate driving circuit 12, are all connected to the detection module 3. The detection module 3 can detect the voltage of the gate driving signal output by the first gate driving circuit 11 and generate a detection signal based on the voltage of the gate driving signal. The first control module 4 receives the detection signal and determines whether the voltage of the gate driving signal output by the first gate driving circuit 11 is normal based on the detection signal. For example, the first control module 4 may have a preset threshold voltage and compare the detection signal with the threshold voltage to determine whether the voltage of the gate driving signal output by the first gate driving circuit 11 is normal. When the first control module 4 determines that the voltage of the gate driving signal output by the first gate driving circuit 11 is abnormal, it controls the second gate driving circuit 12 to replace the abnormal first gate driving circuit 11 and take over operation. For example, it controls the abnormal first gate driving circuit 11 to disconnect from the gate line and controls the second gate driving circuit 12 to connect to the disconnected gate line of the abnormal first gate driving circuit 11.

[0067] In the technical solution of this embodiment of the invention, at least one of the first gate driving circuit 11 at the first M-stage and the last N-stage first gate driving circuit 11 is correspondingly provided with a second gate driving circuit 12. The second gate driving circuit 12 can serve as a backup for the corresponding first gate driving circuit 11. The detection module 3 can detect the state of the first gate driving circuit 11 and output a detection signal. When the first control module 4 determines that the first gate driving circuit 11 corresponding to the second gate driving circuit 12 is abnormal based on the detection signal, it controls the second gate driving circuit 12 to replace the abnormal first gate driving circuit 11 and start working. In the technical solution of this embodiment of the invention, the detection module 3 can detect in real time whether the output of the first gate driving circuit 11 at the upper and lower edges of the display panel is abnormal. When the first gate driving circuit 11 is affected by ESD and its output is abnormal, the first control module 4 controls the second gate driving circuit 12 to replace the abnormal first gate driving circuit 11 and start working, thereby repairing the display device and ensuring that when the first gate driving circuit 11 is affected by ESD, the pixels in each row can also receive normal gate driving signals, and the entire operation of the display panel will not be affected.

[0068] Optionally, based on the above embodiments, Figure 4 This is a schematic diagram of another display device provided in an embodiment of the present invention, such as... Figure 3 and Figure 4 As shown, the display device further includes at least one first switch module 5 and at least one second switch module 6. The first switch module 5 is connected between the output terminal of the first gate driving circuit 11 and the gate line, and the second switch module 6 is connected between the output terminal of the second gate circuit 12 and the gate line. The first control module 4 is used to control the on or off state of the first switch module 5 and the second switch module 6. Preferably, the first switch module 5 includes a first transistor T1, and the second switch module 6 includes a second transistor T2. The first terminal of the first transistor T1 is connected to the output terminal of the first gate driving circuit 11, the second terminal of the first transistor T1 is connected to the gate line, and the control terminal of the first transistor T1 is connected to the first control module 4. The first terminal of the second transistor T2 is connected to the output terminal of the second gate circuit 12, the second terminal of the second transistor T2 is connected to the gate line, and the control terminal of the second transistor T2 is connected to the first control module 4.

[0069] Specifically, at least one of the first gate driving circuit 11 at the first M level and the first gate driving circuit 11 at the last N level of the display panel is provided with a second gate driving circuit 12. A first switch module 5 can be provided between the output terminal of the first gate driving circuit 11 with the second gate driving circuit 12 and the gate line connecting at least one row of pixels. A second switch module 6 can be provided between the output terminal of the second gate driving circuit 12 corresponding to the first gate driving circuit 11 and the same gate line.

[0070] Both the first switch module 5 and the second switch module 6 can be controlled by the first control module 4. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal, the first control module 4 can control the first switch module 5 to turn on and control the second switch module 6 to turn off. At this time, the first gate drive circuit 11 normally provides the gate drive signal for at least one row of pixel-connected gate lines. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, the first control module 4 can control the first switch module 5 to turn off and control the second switch module 6 to turn on, thereby controlling the second gate drive circuit 12 to replace the abnormal first gate drive circuit 11 and start working. The second gate drive circuit 12 normally provides the gate drive signal for the same at least one row of pixel-connected gate lines.

[0071] like Figure 4 As shown, the first switching module 5 may include a first transistor T1, and the second switching module 6 may include a second transistor T2. The first transistor T1 and the second transistor T2 are designed to be relatively large in size, with the dimensions of the first transistor T1 and the second transistor T2 being larger than [the specified size]. Figure 1 The transistor sizes in the gate drive circuit shown enable strong ESD protection for the first transistor T1 and the second transistor T2. The first control module 4 controls the first transistor T1 and the second transistor T2 to turn on or off. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal, the first gate drive circuit 11 normally provides the gate drive signal to the gate lines connected to at least one row of pixels. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, the second gate drive circuit 12 normally provides the gate drive signal to the same gate lines connected to at least one row of pixels.

[0072] Optionally, based on the above embodiments, refer to... Figure 3 and Figure 4 The first control module 4 is used to control the first switch module 5 to turn off and the second switch module 6 to turn on when the first gate drive circuit 11 corresponding to the second gate drive circuit 12 is abnormal according to the detection signal. The first control module 4 is used to control the first switch module 5 to turn on and the second switch module 6 to turn off when the first gate drive circuit 11 corresponding to the second gate drive circuit 12 is normal according to the detection signal.

[0073] Specifically, both the first switch module 5 and the second switch module 6 can be controlled by the first control module 4. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal, the first control module 4 can control the first switch module 5 to turn on and control the second switch module 6 to turn off. At this time, the first gate drive circuit 11 normally provides the gate drive signal for at least one row of pixel-connected gate lines. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, the first control module 4 can control the first switch module 5 to turn off and control the second switch module 6 to turn on, thereby controlling the second gate drive circuit 12 to replace the abnormal first gate drive circuit 11 and take over operation. The second gate drive circuit 12 normally provides the gate drive signal for the same at least one row of pixel-connected gate lines.

[0074] Optionally, based on the above embodiments, Figure 5 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention, such as... Figure 5 As shown, the first control module 4 includes a judgment unit 41 and a response unit 42. The judgment unit 41 is connected to the detection module 3, and is used to determine whether the first gate drive circuit 12 corresponding to the second gate drive circuit 12 is abnormal based on the detection signal, and outputs a judgment signal. The response unit 42 is connected to the judgment unit 41, and is used to control the second gate drive circuit 12 to replace the abnormal first gate drive circuit 11 and start working when the judgment signal determines that the first gate drive circuit 11 corresponding to the second gate drive circuit 12 is abnormal.

[0075] Specifically, the first control module 4 may include a judgment unit 41 and a response unit 42. The judgment unit 41 receives the detection signal output by the detection module 3. The detection signal may be a signal after amplifying the voltage of the gate drive signal. For example, the gate drive signal may be a first-level signal VGL or a second-level signal VGH. The detection module 3 amplifies the voltage of the first-level signal VGL or the second-level signal VGH, and the detection signal is the voltage-amplified first-level signal VGL or second-level signal VGH. The judgment unit 41 may have a preset threshold voltage. The judgment unit 41 compares the voltage of the detection signal with the threshold voltage. When the voltage of the detection signal does not exceed the range of the threshold voltage, the judgment unit determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal. When the voltage of the detection signal exceeds the range of the threshold voltage, the judgment unit determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal.

[0076] For example, when the first gate drive circuit 11 needs to output a second level signal VGH, the output voltage of the first gate drive circuit 11 is at V VGH±5% V VGH The output is within the specified range, V. VGH This refers to the voltage corresponding to the first level signal VGH. Detection module 3 amplifies the voltage of the first level signal VGH by up to 50 times. At this time, the threshold voltage preset by judgment unit 41 can be 50*(V... VGH ±5% V VGH ).

[0077] The judgment signal output by the judgment unit 41 may include a first judgment signal and a second judgment signal. The judgment unit 41 outputs the first judgment signal when it determines that the voltage of the detected signal does not exceed the threshold voltage range. The judgment unit 41 outputs the second judgment signal when it determines that the voltage of the detected signal exceeds the threshold voltage range.

[0078] The response unit 42 can be connected to the control terminals of the first switch module 5 and the second switch module 6. When the response unit 42 receives the first judgment signal, it controls the first switch module 5 to turn on and the second switch module 6 to turn off. When the response module 42 receives the second judgment signal, it controls the first switch module 5 to turn off and the second switch module 6 to turn on.

[0079] Optionally, based on the above embodiments, refer to... Figure 5 The display device includes a display driver chip 7. The display driver chip 7 includes a detection module 3 and a first control module 4, that is, the detection module 3 and the first control module 4 are integrated into the display driver chip 7. The first control module 4 is also used to rewrite the value of the status register of the display driver chip 7 when it is determined from the detection signal that the first gate drive circuit 11 corresponding to the second gate drive circuit 12 is abnormal.

[0080] Specifically, when the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal, the first control module 4 can control the first switch module 5 to turn on and control the second switch module 6 to turn off. At this time, the first gate drive circuit 11 normally provides the gate drive signal for at least one row of pixel-connected gate lines. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, the first control module 4 can control the first switch module 5 to turn off and control the second switch module 6 to turn on, thereby controlling the second gate drive circuit 12 to replace the abnormal first gate drive circuit 11 and take over operation. The second gate drive circuit 12 normally provides the gate drive signal for the same at least one row of pixel-connected gate lines. Furthermore, when the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, the first control module 4 can rewrite the value of the status register of the display driver chip 7. The module finished product detection can obtain whether the output of the first gate drive circuit 11 is abnormal by reading back the value of the corresponding status register. This setting allows the operator to easily obtain whether the output of the first gate drive circuit 11 is abnormal.

[0081] It should be noted that in existing display panels, when the output of the last stage gate driving circuit is abnormal, it only affects the pixels in the last row of the display panel, which is relatively difficult to detect with the naked eye. The technical solution of this embodiment of the invention can provide a second gate driving circuit 12 corresponding to the first gate driving circuit 11 cascaded N times at the upper edge of the display panel. The second gate driving circuit 12 can serve as a backup for the corresponding first gate driving circuit 11. The detection module 3 can detect the state of the first gate driving circuit 11 and output a detection signal. When the first control module 4 determines that the first gate driving circuit 11 corresponding to the second gate driving circuit 12 is abnormal based on the detection signal, it controls the second gate driving circuit 12 to replace the abnormal first gate driving circuit 11 and take over operation. This invention, by setting the detection module 3, can effectively detect in real time whether the output of the last stage first gate driving circuit 11 is abnormal, and promptly feedback the abnormal output state of the first gate driving circuit 11 by rewriting the value of the status register of the display driver chip 7.

[0082] Optionally, based on the above embodiments, Figure 6 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention, such as... Figure 6As shown, the detection module 3 includes an input storage unit 31, an operational amplifier U1, and an output storage unit 32. The first terminal of the input storage unit 31 is connected to the output terminal of the first gate driving circuit 11 corresponding to the second gate driving circuit 12. The second terminal of the input storage unit 31 is connected to a reference voltage V1. The third terminal of the input storage unit 31 is connected to the first terminal of the output storage unit 32. The input storage unit 31 stores the output voltage of the first gate driving circuit 11 corresponding to the second gate driving circuit 12. The second terminal of the output storage unit 32 is connected to the inverting input terminal of the operational amplifier U1, and the third terminal of the output storage unit 32 is connected to the output terminal of the operational amplifier U1. The output storage unit 32 stores the voltage of the input storage unit 31. The non-inverting input terminal of the operational amplifier U1 is connected to the reference voltage V1, and the output terminal of the operational amplifier U1 is connected to the first control module 4. The operational amplifier U1 outputs a detection signal.

[0083] Specifically, the output of the first gate drive circuit 11 corresponding to the second gate drive circuit 12 is an AC signal, and the gate drive signal switches between a first-level signal VGL and a second-level signal VGH. The reference voltage V1 can be either the first-level signal VGL or the second-level signal VGH. When the first gate drive current 11 corresponding to the second gate drive circuit 12 needs to output the first-level signal VGL, the reference voltage V1 is set to the first-level signal VGL; when the first gate drive current 11 corresponding to the second gate drive circuit 12 needs to output the second-level signal VGH, the reference voltage V1 is set to the second-level signal VGH.

[0084] The input storage module 31 receives the gate drive signal output from the first gate drive circuit 11 and stores the voltage of the gate drive signal in the input storage unit 31. Then, the input storage unit 31 discharges to the output storage unit 32, realizing charge transfer. The input storage unit 31 may include a first capacitor C1, and the output storage unit 32 may include a second capacitor C2. By setting the capacitance of the second capacitor C2 to be less than the capacitance of the first capacitor C1, the detection signal output by the operational amplifier U1 can be made to be an amplified signal of the voltage of the gate drive signal.

[0085] Optionally, based on the above embodiments, refer to... Figure 6The input storage unit 31 includes a first switching unit 311 and a first capacitor C1. The output storage unit 32 includes a second switching unit 321 and a second capacitor C2. The display device also includes a second control module 8. The first terminal of the first switching unit 311 is connected to the output terminal of the first gate driving circuit 11 corresponding to the second gate driving circuit 12. The second terminal of the first switching unit 311 is connected to the first terminal of the first capacitor C1. The control terminal of the first switching unit 311 is connected to the second control module 8. The second control module 8 is used to control the first switching unit 311 to be turned on or off. The first terminal of the first capacitor C1 is also connected to the first terminal of the second switching unit 321. The second terminal of the first capacitor C1 is connected to the reference voltage V1. The second terminal of the second switching unit 321 is connected to the first terminal of the second capacitor C2 and is also connected to the inverting input terminal of the operational amplifier U1. The control terminal of the second switching unit 321 is connected to the second control module 8. The second control module 8 is also used to control the second switching unit 321 to be turned on or off. The second terminal of the second capacitor C2 is connected to the output terminal of the operational amplifier U1.

[0086] Specifically, the first capacitor C1 is the input capacitor, and the second capacitor C2 is the output capacitor. The second control module 8 first controls the first switching unit 311 to turn on and the second switching unit 321 to turn off. The first terminal of the first capacitor C1 is connected to the gate driving signal output by the first gate driving circuit 11. The voltage of the gate driving signal charges the first capacitor C1 until the voltages across the first capacitor C1 are the voltage of the gate driving signal and the reference voltage V1, respectively. Then, the second control module 8 controls the first switching unit 311 to turn off and the second switching unit 321 to turn on. The first capacitor C1 discharges through the second capacitor C2, realizing charge transfer. The capacitance value of the second capacitor C2 can be smaller than the capacitance value of the first capacitor C1. By reasonably setting the capacitance values ​​of the first capacitor C1 and the second capacitor C2, the detection module 3 can detect minute changes in the voltage of the gate driving signal. The formula for calculating the voltage of the detected signal is:

[0087]

[0088] Among them, U in U is the voltage of the gate drive signal output by the first gate drive circuit 11. out The voltage of the detection signal.

[0089] From the above formula, it can be seen that the voltage U of the gate drive signal in the detection module 3 is... in The difference between the voltage and the reference voltage V1 is amplified by a factor of -C1 / C2 to become the voltage U of the detection signal. outThe difference between the voltage of the gate drive signal output by the first gate drive circuit 11 and the reference voltage V1. At this time, the detection module 3 amplifies the small difference between the voltage of the gate drive signal output by the first gate drive circuit 11 and the reference voltage V1 by a certain proportion. For example, when the gate drive signal output by the first gate drive circuit 11 needs to be the second level signal VGH, the output voltage of the first gate drive circuit 11 is at V... VGH ±5% V VGH The normal output is within the specified range, i.e., the voltage U of the gate drive signal. in The difference between the voltage and the reference voltage V1 needs to be ±5% V. VGH Within the specified voltage range, the reference voltage is the voltage of the second-level signal VGH. If C1 / C2 equals 50, the first control module 4 can preset the threshold voltage to (50 * ±5%)V. VGH )+V VGH .

[0090] The circuit of the detection module 3 can be configured as the operational amplifier circuit provided in the embodiment of the present invention, or as a digital bridge circuit. Its function is to enable the first control module 4 to effectively detect the voltage change of the gate drive signal output by the first gate drive circuit 11.

[0091] Figure 7 This is a flowchart of a repair method for a display device provided in an embodiment of the present invention, such as... Figure 7 As shown, the repair method for this display device includes:

[0092] S100: When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and start working.

[0093] Specifically, such as Figure 3 As shown, the first control module 4 receives a detection signal and determines whether the voltage of the gate drive signal output by the first gate drive circuit 11 is normal based on the detection signal. For example, the first control module 4 can preset a threshold voltage and compare the detection signal with the threshold voltage to determine whether the voltage of the gate drive signal output by the first gate drive circuit 11 is normal. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, it controls the second gate drive circuit 12 to replace the abnormal first gate drive circuit 11 and begin operation.

[0094] Optionally, based on the above embodiments, Figure 8 This is a flowchart of another method for repairing a display device provided in an embodiment of the present invention, such as... Figure 8 As shown, the repair methods include:

[0095] S200: When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the first switch module to turn off and controls the second switch module to turn on.

[0096] Specifically, such as Figure 3 and Figure 4 As shown, both the first switch module 5 and the second switch module 6 can be controlled by the first control module 4. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal, the first control module 4 can control the first switch module 5 to turn on and control the second switch module 6 to turn off. At this time, the first gate drive circuit 11 normally provides the gate drive signal for at least one row of pixel-connected gate lines. When the first control module 4 determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal, the first control module 4 can control the first switch module 5 to turn off and control the second switch module 6 to turn on, thereby controlling the second gate drive circuit 12 to replace the abnormal first gate drive circuit 11 and connect to work. The second gate drive circuit 12 normally provides the gate drive signal for the same at least one row of pixel-connected gate lines.

[0097] Optionally, based on the above embodiments, Figure 9 This is a flowchart of another display device driving method provided by an embodiment of the present invention, such as... Figure 9 As shown, the driving method includes:

[0098] S300: The judgment unit determines whether the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, and outputs a judgment signal.

[0099] Specifically, such as Figure 5 As shown, the first control module 4 may include a judgment unit 41 and a response unit 42. The judgment unit 41 receives the detection signal output by the detection module 3. The detection signal may be a signal after amplifying the voltage of the gate drive signal. For example, the gate drive signal may be a first-level signal VGL or a second-level signal VGH. The detection module 3 amplifies the voltage of the first-level signal VGL or the second-level signal VGH, and the detection signal is the voltage-amplified first-level signal VGL or second-level signal VGH. The judgment unit 41 may have a preset threshold voltage. The judgment unit 41 compares the voltage of the detection signal with the threshold voltage. When the voltage of the detection signal does not exceed the range of the threshold voltage, the judgment unit determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is normal. When the voltage of the detection signal exceeds the range of the threshold voltage, the judgment unit determines that the voltage of the gate drive signal output by the first gate drive circuit 11 is abnormal.

[0100] For example, when the first gate drive circuit 11 needs to output a second level signal VGH, the output voltage of the first gate drive circuit 11 is at V VGH ±5% V VGH The output is within the specified range, V. VGH This refers to the voltage corresponding to the first level signal VGH. Detection module 3 amplifies the voltage of the first level signal VGH by up to 50 times. At this time, the threshold voltage preset by judgment unit 41 can be 50*(V... VGH ±5% V VGH ).

[0101] The judgment signal output by the judgment unit 41 may include a first judgment signal and a second judgment signal. The judgment unit 41 outputs the first judgment signal when it determines that the voltage of the detected signal does not exceed the threshold voltage range. The judgment unit 41 outputs the second judgment signal when it determines that the voltage of the detected signal exceeds the threshold voltage range.

[0102] S310: When the response unit determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the judgment signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and start working.

[0103] Specifically, such as Figure 5 As shown, the response unit 42 can be connected to the control terminals of the first switch module 5 and the second switch module 6. When the response unit 42 receives the first judgment signal, it controls the first switch module 5 to turn on and the second switch module 6 to turn off. When the response unit 42 receives the second judgment signal, it controls the first switch module 5 to turn off and the second switch module 6 to turn on.

[0104] The repair method for the display device provided in any of the above embodiments of the present invention is used to repair the display device provided in any of the above embodiments of the present invention, and has the beneficial effects of the display device provided in any of the above embodiments of the present invention.

[0105] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0106] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display device, characterized in that, include: Multiple first gate drive circuits are cascaded together. At least one second gate driving circuit is configured to correspond to at least one of the first gate driving circuits of the first M stages and the last N stages, serving as a backup of the corresponding first gate driving circuit; wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1. A detection module is connected to the first gate driving circuit corresponding to the second gate driving circuit. The detection module is used to detect the state of the first gate driving circuit and output a detection signal. A first control module is connected to the detection module. The first control module is used to control the second gate drive circuit to replace the abnormal first gate drive circuit when the first gate drive circuit corresponding to the second gate drive circuit is abnormal according to the detection signal.

2. The display device according to claim 1, characterized in that, It also includes at least one first switch module and at least one second switch module; The first switch module is connected between the output terminal of the first gate drive circuit and the gate line, and the second switch module is connected between the output terminal of the second gate circuit and the gate line. The first control module is used to control the on or off state of the first switch module and the second switch module; Preferably, the first switching module includes a first transistor, and the second switching module includes a second transistor; The first terminal of the first transistor is connected to the output terminal of the first gate driving circuit, the second terminal of the first transistor is connected to the gate line, and the control terminal of the first transistor is connected to the first control module; the first terminal of the second transistor is connected to the output terminal of the second gate circuit, the second terminal of the second transistor is connected to the gate line, and the control terminal of the second transistor is connected to the first control module.

3. The display device according to claim 2, characterized in that, The first control module is configured to control the first switch module to turn off and the second switch module to turn on when it determines, based on the detection signal, that the first gate drive circuit corresponding to the second gate drive circuit is abnormal; and the first control module is configured to control the first switch module to turn on and the second switch module to turn off when it determines, based on the detection signal, that the first gate drive circuit corresponding to the second gate drive circuit is not abnormal.

4. The display device according to claim 1, characterized in that, The first control module includes: a judgment unit and a response unit; The judgment unit is connected to the detection module. The judgment unit is used to determine whether the first gate driving circuit corresponding to the second gate driving circuit is abnormal based on the detection signal, and outputs a judgment signal. The response unit is connected to the judgment unit. The response unit is used to control the second gate driving circuit to replace the abnormal first gate driving circuit when the judgment signal determines that the first gate driving circuit corresponding to the second gate driving circuit is abnormal.

5. The display device according to claim 1, characterized in that, The display device includes a display driver chip; the display driver chip includes the detection module and the first control module, and the first control module is further configured to rewrite the value of the status register of the display driver chip when it is determined, based on the detection signal, that the first gate driving circuit corresponding to the second gate driving circuit is abnormal.

6. The display device according to claim 1, characterized in that, The detection module includes: an input storage unit, an operational amplifier, and an output storage unit; The first terminal of the input storage unit is connected to the output terminal of the first gate driving circuit corresponding to the second gate driving circuit, the second terminal of the input storage unit is connected to a reference voltage, and the third terminal of the input storage unit is connected to the first terminal of the output storage unit; the input storage unit is used to store the output voltage of the first gate driving circuit corresponding to the second gate driving circuit. The second terminal of the output storage unit is connected to the inverting input terminal of the operational amplifier, and the third terminal of the output storage unit is connected to the output terminal of the operational amplifier; the output storage unit is used to store the voltage of the input storage unit. The non-inverting input of the operational amplifier is connected to the reference voltage, and the output of the operational amplifier is connected to the first control module; the operational amplifier is used to output the detection signal.

7. The display device according to claim 6, characterized in that, The input storage unit includes a first switching unit and a first capacitor; the output storage unit includes a second switching unit and a second capacitor; the display device further includes a second control module. The first terminal of the first switching unit is connected to the output terminal of the first gate driving circuit corresponding to the second gate driving circuit, the second terminal of the first switching unit is connected to the first terminal of the first capacitor, and the control terminal of the first switching unit is connected to the second control module; the second control module is used to control the first switching unit to be turned on or off. The first terminal of the first capacitor is also connected to the first terminal of the second switching unit, and the second terminal of the first capacitor is connected to the reference voltage. The second terminal of the second switching unit is connected to the first terminal of the second capacitor and also to the inverting input terminal of the operational amplifier. The control terminal of the second switching unit is connected to the second control module. The second control module is also used to control the second switching unit to be turned on or off. The second terminal of the second capacitor is connected to the output terminal of the operational amplifier.

8. A method for repairing a display device, characterized in that, The display device includes a plurality of first gate driving circuits; at least one second gate driving circuit, corresponding to at least one of the first gate driving circuits of the first M stages and the last N stages; and a detection module connected to the first gate driving circuit corresponding to the second gate driving circuit. The detection module is used to detect the state of the first gate driving circuit and output a detection signal. A first control module, which is connected to the detection module; The repair method includes: When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and start working.

9. The method for repairing a display device according to claim 8, characterized in that, The display device further includes at least one first switch module and at least one second switch module; the first switch module is connected between the output terminal of the first gate driving circuit and the gate line, and the second switch module is connected between the output terminal of the second gate circuit and the gate line. When the first control module determines, based on the detection signal, that the first gate drive circuit corresponding to the second gate drive circuit is abnormal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and take over operation, including: When the first control module determines that the first gate drive circuit corresponding to the second gate drive circuit is abnormal based on the detection signal, it controls the first switch module to turn off and controls the second switch module to turn on.

10. The method for repairing a display device according to claim 8, characterized in that, The first control module includes a judgment unit and a response unit; the judgment unit is connected to the detection module, and the response unit is connected to the judgment unit. When the first control module determines, based on the detection signal, that the first gate drive circuit corresponding to the second gate drive circuit is abnormal, it controls the second gate drive circuit to replace the abnormal first gate drive circuit and take over operation, including: The judgment unit determines whether the first gate driving circuit corresponding to the second gate driving circuit is abnormal based on the detection signal, and outputs a judgment signal. When the response unit determines that the first gate driving circuit corresponding to the second gate driving circuit is abnormal according to the judgment signal, it controls the second gate driving circuit to replace the abnormal first gate driving circuit and start working.

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