Driving circuit repairing device and display panel

Abstract

The utility model belongs to the technical field of display driving, and particularly relates to a driving circuit repairing device and a display panel, and the repairing device comprises a first repairing line which is arranged between a first gate driving circuit and a display area; a second repair line disposed between the second gate drive circuit and the display area; the signal repairing circuit is used for repairing the driving signal introduced on the second repairing line when the nth GOA unit of the first gate driving circuit is abnormal, so that the repaired driving signal drives the nth scanning line on the first side of the display area through the first repairing line, the repairing module is also used for repairing the driving signal introduced on the first repairing line when the nth GOA unit of the second gate driving circuit is abnormal, so that the repaired driving signal drives the nth scanning line on the second side of the display area through the second repairing line; according to the invention, when the abnormal GOA unit is repaired, the difference between the driving signals on the two sides can be reduced, and the image display effect is met.

Description

Technical Field

[0001] This disclosure belongs to the field of display driving technology, specifically relating to a driving circuit repair device and a display panel. Background Technology

[0002] The gate driving circuit used in display panels contains multiple cascaded GOA (Gate on Array) units. The output signal generated by each GOA unit not only provides the turn-on voltage for the pixel units in the current row, but also serves as the pull-up and pull-down signals for the GOA units in front and behind. Therefore, an abnormality in a single GOA unit not only affects the display output of the current stage, but also affects the output of the cascaded signals, causing abnormalities in the output of other GOA units, resulting in display abnormalities in the entire screen and affecting the production yield of the display panel.

[0003] It is evident that how to repair abnormal gate drive circuits is an urgent problem to be solved. Utility Model Content

[0004] This application provides a drive circuit repair device and a display panel to solve the problem of abnormal repair of the gate drive circuit. This application introduces the drive signal output by the normal side GOA unit into the signal repair circuit through the repair line on the normal side. The signal repair circuit amplifies the introduced drive signal and then drives the corresponding scan line through the repair line on the abnormal side. This not only repairs the abnormal GOA unit, but also reduces the difference between the drive signals on both sides, thus satisfying the display effect.

[0005] In a first aspect, this application provides a driving circuit repair device applied to a display panel, the display panel including a display area, a first gate driving circuit located on a first side of the display area, a second gate driving circuit located on a second side of the display area, and multiple scan lines; the repair device includes: a first repair line disposed between the first gate driving circuit and the display area, and intersecting with the multiple scan lines on different layers; a second repair line disposed between the second gate driving circuit and the display area, and intersecting with the multiple scan lines on different layers; and a signal repair circuit, the first end of the signal repair circuit being electrically connected to the first repair line, and the second end of the signal repair circuit being electrically connected to the second repair line, for repairing the driving signal introduced on the second repair line when the nth level GOA unit of the first gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the first side of the display area through the first repair line, and also for repairing the driving signal introduced on the first repair line when the nth level GOA unit of the second gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the second side of the display area through the second repair line.

[0006] Optionally, the repair device further includes: a third repair line disposed between the first repair line and the display area, and intersecting with the plurality of scan lines at different layers; the third repair line is also electrically connected to the second end of the signal repair circuit.

[0007] Optionally, the signal repair circuit is further configured to repair the driving signal introduced on the first repair line when the nth stage GOA unit of the second gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the second side of the display area through the second repair line, and simultaneously drives the nth scan line on the first side of the display area through the third repair line; wherein, the driving signal introduced on the first repair line is the driving signal output by the nth stage GOA unit of the first gate driving circuit.

[0008] Optionally, the repair device further includes: a fourth repair line, disposed between the second repair line and the display area, and intersecting with the plurality of scan lines at different layers; the fourth repair line is also electrically connected to the first end of the signal repair circuit.

[0009] Optionally, the signal repair circuit is further configured to repair the driving signal introduced on the second repair line when the nth stage GOA unit of the first gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the first side of the display area through the first repair line, and simultaneously drives the nth scan line on the second side of the display area through the fourth repair line; wherein, the driving signal introduced on the second repair line is the driving signal output by the nth stage GOA unit of the second gate driving circuit.

[0010] Optionally, the first gate driving circuit and the second gate driving circuit include multiple GOA units, each GOA unit including a stage transmission output terminal and a drive output terminal. The repair device further includes at least one stage transmission repair line, the first end of which is arranged in a different layer and crosses with the stage transmission output terminal, and the second end of which is arranged in a different layer and crosses with the drive output terminal.

[0011] Optionally, the repair device further includes: multiple laser connection points disposed at the intersections of the first repair line, the second repair line, the third repair line, and the fourth repair line with multiple scan lines, the intersection of the stage transmission repair line with the stage transmission output end, and the intersection of the stage transmission repair line with the drive output end.

[0012] Optionally, the signal repair circuit includes: a first repair unit, the input terminal of which is electrically connected to the first repair line, and the output terminal of which is electrically connected to the second repair line, for amplifying the signal on the first repair line; and a second repair unit, the input terminal of which is electrically connected to the second repair line, and the output terminal of which is electrically connected to the first repair line, for amplifying the signal on the second repair line.

[0013] Optionally, the first repair unit and / or the second repair unit includes: a comparator amplifier, the non-inverting input terminal of the comparator amplifier being electrically connected to any repair line, the inverting input terminal of the comparator amplifier being connected to a reference voltage input terminal, and the output terminal of the comparator amplifier being electrically connected to a repair line.

[0014] Optionally, the first repair unit and / or the second repair unit further includes: a MOS transistor, the control terminal of which is connected to the output terminal of the comparator amplifier, the first terminal of which is connected to the timing signal output terminal, and the second terminal of which is electrically connected to another repair line.

[0015] Optionally, the first repair unit and / or the second repair unit further include: a first resistor, the first end of which is electrically connected to any one of the repair lines, and the second end of which is connected to the non-inverting input of the comparator amplifier; or / and a second resistor, the first end of which is connected to the second end of the MOS transistor, and the second end of which is electrically connected to another repair line.

[0016] Secondly, this application provides a display panel including a display area and a non-display area. The display area includes multiple scan lines. The non-display area includes a first gate driving circuit located on a first side of the display area and a second gate driving circuit located on a second side of the display area. The non-display area also includes at least one set of driving circuit repair devices.

[0017] The technical solution provided in this application has at least the following beneficial effects:

[0018] This application sets a repair line on each side of the display area. When an abnormality occurs in any level of GOA unit, the driving signal output by the normal side GOA unit is introduced into the signal repair circuit through the repair line on the normal side. The signal repair circuit repairs the introduced driving signal and then drives the corresponding scan line through the repair line on the abnormal side. This not only repairs the abnormal GOA unit, but also reduces the difference between the driving signals on both sides, thus satisfying the display effect. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] Figure 1 The diagram shown is a structural schematic of a drive circuit repair device provided in an embodiment of this application.

[0021] Figure 2 The diagram shown is a first type of repair provided in an embodiment of this application.

[0022] Figure 3 The diagram shown is a second type of repair provided in an embodiment of this application.

[0023] Figure 4 The diagram shown is a third type of repair provided in an embodiment of this application.

[0024] Figure 5 The diagram shown is a fourth type of repair provided in the embodiments of this application.

[0025] Figure 6 The diagram shown is a structural schematic of another drive circuit repair device provided in an embodiment of this application.

[0026] Figure 7 The diagram shown is a circuit diagram of a GOA unit provided in an embodiment of this application.

[0027] Figure 8 The diagram shown is a schematic diagram of a signal repair circuit provided in an embodiment of this application.

[0028] Figure 9 The diagram shown is a circuit diagram of a repair unit provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Display panel; 100. Drive circuit repair device; 110. First repair line; 120. Second repair line; 130. Signal repair circuit; 131. First repair unit; 132. Second repair unit; 140. Third repair line; 150. Fourth repair line; 160. Stage repair line; 170. Laser connection point; U0. Comparator amplifier; T0. MOSFET; R1. First resistor; R2. Second resistor;

[0031] 200, Display area; 300, First gate driving circuit; 400, Second gate driving circuit; 500, Scan line; 600, PCB board. Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0033] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0034] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0035] In a first aspect, this application provides a gate driving circuit, specifically including the following embodiments:

[0036] Figure 1 The diagram shown is a structural schematic of a drive circuit repair device provided in an embodiment of this application; as shown Figure 1 As shown, the driving circuit repair device 100 is applied to the display panel 10. The display panel 10 includes a display area 200 and a non-display area 200. The non-display area 200 includes a first gate driving circuit 300 located on the first side of the display area 200, a second gate driving circuit 400 located on the second side of the display area 200, and a PCB board 600 located below the display area 200. The display area 200 includes pixel circuits arranged in an array. The pixel circuits are connected to the first gate driving circuit 300 and the second gate driving circuit 400 on both sides through multiple scan lines 500, respectively. In addition, the first gate driving circuit 300 includes multiple cascaded GOA units, and the second gate driving circuit 400 includes multiple cascaded GOA units. The two ends of the multiple scan lines 500 are electrically connected to the multiple cascaded GOA units in the first gate driving circuit 300 and the multiple cascaded GOA units in the second gate driving circuit 400, respectively. The first side of the display area 200 can be the left side of the display area 200, and the second side of the display area 200 can be the right side of the display area 200.

[0037] like Figure 1 As shown, the driving circuit repair device 100 in this embodiment includes a first repair line 110, which is disposed between the first gate driving circuit 300 and the display area 200, and is disposed in a different layer with multiple scan lines 500. The different layer cross-distribution means that they cross but are not connected, that is, the first repair line 110 and the scan lines 500 between the first gate driving circuit 300 and the display area 200 are disposed on different wiring layers, but their orthogonal projections on the wiring layers intersect. In order to ensure the isolation between the first repair line 110 and the scan lines 500, an insulating layer is provided between the two wiring layers for isolation. By welding the intersection points, the first repair line 110 can be electrically connected to the corresponding scan line 500.

[0038] The driving circuit repair device 100 in this embodiment also includes a second repair line 120, which is disposed between the second gate driving circuit 400 and the display area 200, and is disposed in a different layer with multiple scan lines 500; wherein, the second repair line 120 and the first repair line 110 are only different in the setting position, but the setting method is the same, which will not be described again here.

[0039] The driving device in this embodiment also includes a signal repair circuit 130 disposed on the PCB board 600. The first end of the signal repair circuit 130 is electrically connected to the first repair line 110, and the second end of the signal repair circuit 130 is electrically connected to the second repair line 120. It is used to repair the driving signal introduced on the second repair line when the nth level GOA unit of the first gate driving circuit is abnormal, so that the repaired driving signal drives the nth scan line on the first side of the display area through the first repair line. It is also used to repair the driving signal introduced on the first repair line when the nth level GOA unit of the second gate driving circuit is abnormal, so that the repaired driving signal drives the nth scan line on the second side of the display area through the second repair line.

[0040] In one embodiment, taking the anomaly of the nth-stage GOA cell in the second gate drive circuit 400 as an example, a specific repair example of the drive circuit repair device 100 is as follows: Figure 2As shown: First, the scan line 500 between the second repair line 120 and the second gate drive circuit 400 is cut by laser. Second, the intersection of the first repair line 110 and the nth scan line 500, and the intersection of the second repair line 120 and the nth scan line 500 are fused together, so that the drive signal output by the nth level GOA unit in the first gate drive circuit 300 is introduced to the signal repair circuit 130 on the first repair line 110. Then, since there will be a voltage drop on the first repair line 110 and the second repair line 120, the signal repair circuit 130 amplifies the drive signal on the first repair line 110 and outputs it to the second repair line 120, so that the drive signal on the second repair line 120 drives the nth scan line 500, thereby repairing the nth level GOA unit in the second gate drive circuit 400.

[0041] The purpose of disconnecting the connection between the first repair line 110 and the second gate drive circuit 400 is to prevent abnormal signals output by the GOA unit from interfering with the first repair line 110. If there is no interference signal, disconnection is not necessary. In addition, when repairing the cascade through the signal on the repair line, disconnection is not necessary. The disconnection effect and method in the following embodiments are the same as here, and will not be repeated hereafter.

[0042] In another embodiment, taking the anomaly of the nth stage GOA unit in the first gate drive circuit 300 as an example, a specific repair example of the drive circuit repair device 100 is as follows: Figure 3 As shown: First, the scan line 500 between the first repair line 110 and the first gate drive circuit 300 is cut by laser. Second, the intersection of the first repair line 110 and the nth scan line 500 is fused together, as is the intersection of the second repair line 120 and the nth scan line 500, so that the drive signal output by the nth level GOA unit in the second gate drive circuit 400 is introduced to the signal repair circuit 130 on the second repair line 120. Then, since there will be a voltage drop on the first repair line 110 and the second repair line 120, the signal repair circuit 130 amplifies the drive signal on the second repair line 120 and outputs it to the first repair line 110, so that the drive signal on the first repair line 110 drives the nth scan line 500, thereby repairing the nth level GOA unit in the first gate drive circuit 300 while reducing the difference in drive signals on both sides of the nth scan line 500, thus meeting the image repair accuracy of the display panel 10.

[0043] It should also be noted that, after repairing the drive signal of the abnormal level GOA unit, this application can repair the stage transmission signal of the abnormal GOA unit through the drive signal. The specific repair method is explained in the following embodiments.

[0044] The technical solution provided in this application has at least the following beneficial effects:

[0045] This application sets a repair line on each side of the display area 200. When any level of GOA unit is abnormal, the driving signal output by the normal side GOA unit is introduced into the signal repair circuit 130 through the repair line on the normal side. The signal repair circuit 130 amplifies the introduced driving signal and then drives the corresponding scan line 500 through the repair line on the abnormal side. This not only repairs the abnormal GOA unit, but also reduces the difference between the driving signals on both sides, thus satisfying the display effect.

[0046] In one embodiment of this application, the repair device further includes a third repair line 140, which is disposed between the first repair line 110 and the display area 200 and is disposed in a different layer with multiple scan lines 500; the third repair line 140 is also electrically connected to the second end of the signal repair circuit 130.

[0047] In this embodiment, the signal repair circuit is also used to repair the driving signal introduced on the first repair line when the nth stage GOA unit of the second gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the second side of the display area through the second repair line, and drives the nth scan line on the first side of the display area through the third repair line; wherein, the driving signal introduced on the first repair line is the driving signal output by the nth stage GOA unit of the first gate driving circuit.

[0048] It should be noted that, in order to further maintain the synchronization of the driving signals on both sides, this embodiment uses the second repair line 120 to repair the abnormal level in the second gate driving circuit 400 with the driving signal output from the signal repair circuit 130, and also uses the third repair line 140 to simultaneously drive the corresponding level of the scan line 500 in the first gate driving circuit 300 with the driving signal output from the signal repair circuit 130. This ensures that the driving signals input to both ends of the nth scan line 500 are the same signal output from the signal repair circuit 130, thus guaranteeing the consistency of the repair signal and improving the repair accuracy.

[0049] For example, taking the nth stage GOA cell in the second gate drive circuit 400 as an example of an anomaly, the repair example is as follows: Figure 4As shown: First, the scan line 500 between the second repair line 120 and the second gate drive circuit 400 is cut off by laser, and the scan line 500 between the first repair line 110 and the third repair line 140 is also cut off. Next, the intersection points of the first repair line 110 and the nth scan line 500, the intersection points of the second repair line 120 and the nth scan line 500, and the intersection points of the third repair line 140 and the nth scan line 500 are fused together, so that the drive signal output from the nth stage GOA unit in the first gate drive circuit 300 is introduced to the signal repair circuit 130 on the first repair line 110. Then, the signal repair circuit 130 amplifies the drive signal on the first repair line 110 and outputs it to the second repair line 120 and the third repair line 140, so that the drive signal on the second repair line 120 and the drive signal on the third repair line 140 simultaneously drive the nth scan line 500, thereby maintaining the consistency of the repair signal.

[0050] In another embodiment of this application, the repair device further includes: a fourth repair line 150, disposed between the second repair line and the display area 200, and intersecting with multiple scan lines 500 in different layers; the fourth repair line 150 is also electrically connected to the first end of the signal repair circuit 130.

[0051] In this embodiment, the signal repair circuit is also used to repair the driving signal introduced on the second repair line when the nth stage GOA unit of the first gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the first side of the display area through the first repair line, and drives the nth scan line on the second side of the display area through the fourth repair line; wherein, the driving signal introduced on the second repair line is the driving signal output by the nth stage GOA unit of the second gate driving circuit.

[0052] It should be noted that, taking the anomaly of the nth-stage GOA unit in the first gate drive circuit 300 as an example, the repair example is as follows: Figure 5As shown: First, the scan line 500 between the first repair line 110 and the first gate drive circuit 300 is cut off by laser, and the scan line 500 between the second repair line 120 and the fourth repair line 150 is also cut off. Second, the intersection points of the first repair line 110 and the nth scan line 500, the intersection points of the second repair line 120 and the nth scan line 500, and the intersection points of the fourth repair line 150 and the nth scan line 500 are fused together, so that the drive signal output from the nth stage GOA unit in the second gate drive circuit 400 is introduced to the signal repair circuit 130 on the second repair line 120. Then, the signal repair circuit 130 amplifies the drive signal on the second repair line 120 and outputs it to the first repair line 110 and the fourth repair line 150, so that the drive signal on the first repair line 110 and the drive signal on the fourth repair line 150 simultaneously drive the nth scan line 500, thereby maintaining the consistency of the repair signal.

[0053] In practical applications, the drive circuit repair device 100 may include only the third repair line 140, or only the fourth repair line 150, or both the third repair line 140 and the fourth repair line 150.

[0054] It should also be noted that Figure 4 and Figure 5 The repair line is connected to the normal side of the GOA abnormal level via laser, and led out to the PCB board 600. After being amplified by the signal repair circuit 130, it is reintroduced to the normal side and abnormal side of the abnormal level for driving. This application can also drive the normal side and abnormal side of the abnormal level through adjacent output signals of the abnormal level. The wiring method of the repair line is the same, only the laser connection point 170 is different. Therefore, based on the wiring structure of the driving circuit repair device 100 provided in this application, various repair methods and application scenarios can be met by combining the laser connection point 170 in different ways.

[0055] In one embodiment of this application, the first gate driving circuit 300 and the second gate driving circuit 400 include a plurality of GOA units. Each GOA unit includes a stage transmission output terminal and a drive output terminal. The repair device further includes at least one stage transmission repair line 160. The first end of the stage transmission repair line 160 is arranged in a different layer and crosses with the stage transmission output terminal. The second end of the stage transmission repair line 160 is arranged in a different layer and crosses with the drive output terminal.

[0056] It should be noted that a GOA unit typically includes a drive output terminal for outputting the drive signal and a stage transmission output terminal for outputting the stage transmission signal. The drive signal and the stage transmission signal are signals with the same waveform and phase; they only differ in the presence of output ports and their functions. For example... Figure 6 and Figure 7As shown, when both the stage transmission output and drive output of the nth stage GOA unit are abnormal, i.e. Figure 7 When transistors T2 and T5 in the stage are both faulty, the nth stage GOA unit cannot output drive signals and stage transmission signals normally, affecting the normal output of other stage GOA units. In this embodiment, a stage transmission repair line 160 is set in each GOA unit, with one end of the stage transmission repair line 160 being cross-layered with the stage transmission output terminal and the other end being cross-layered with the drive output terminal. When the two ends of the stage transmission repair line are laser-welded, the drive signal that has been successfully repaired by the repair line can then be used to repair the stage transmission output terminal through the stage transmission repair line 160.

[0057] like Figure 7 As shown, transistors T1, T2, and T5 in the GOA unit are functional units. The cascading signal FN generated by transistor T5 is responsible for the cascading relationship (pre-charge + pull-down) of the GOA unit. The driving signal GN generated by transistor T2 is responsible for entering the display area 200 and driving the TFTs in the pixel circuit to turn on or off. The Q-point signal generated by transistor T1 is the gate signal of the driving signal GN generated by transistor T2. The function of transistor T3 is to pull down the Q-point, and the function of transistor T4 is to pull down the driving signal G. N; Assuming that when transistor T5 on the left side (both sides) malfunctions and cannot produce the stage transmission signal FN, the gates of transistors T1, T3, and T4 will malfunction, affecting the stage transmission, and bright and dark lines will appear in display area 200; FN and GN are the same signal, the only difference is that FN does not enter display area 200, it only performs the stage transmission function; X in G(NX) / F(NX) indicates that the X stages before the GN stage are responsible for pre-charging the Q point, and Y in F(N+Y) indicates that the Y stages after the GN stage are responsible for pulling down the Q point and the GN signal;

[0058] The repair method in this embodiment is as follows: disconnect the triode signal (CK signal, QN signal, FN signal) of transistor T5, and short-circuit the stage transmission output terminal and the drive output terminal by welding the two laser connection points 170 on the stage transmission repair line 160. This ensures that the repaired drive signal replaces the stage transmission signal for stage transmission, thereby achieving the effect of repairing both the drive signal and the stage transmission signal at the same time.

[0059] Therefore, the drive circuit repair device 100 of this application can not only repair the drive signal of the gate drive circuit through the repair line, but also repair the stage transmission signal in the gate drive circuit through the stage transmission repair line 160.

[0060] In one embodiment of this application, the repair device further includes a plurality of laser connection points 170, which are disposed at the intersections of the first repair line 110, the second repair line 120, the third repair line 140 and the fourth repair line 150 with the plurality of scan lines 500, the intersection of the cascade repair line 160 with the cascade output end, and the intersection of the cascade repair line 160 with the drive output end. It should be noted that by welding the laser connection points 170, the repair lines at the intersections can be short-circuited with the scan lines 500 or the output ports.

[0061] In one embodiment, such as Figure 8 As shown, the signal repair circuit 130 includes: a first repair unit 131 and a second repair unit 132. The input terminal of the first repair unit 131 is electrically connected to the first repair line 110, and the output terminal of the first repair unit 131 is electrically connected to the second repair line 120, for amplifying the signal on the first repair line 110; the input terminal of the second repair unit 132 is electrically connected to the second repair line 120, and the output terminal of the second repair unit 132 is electrically connected to the first repair line 110, for amplifying the signal on the second repair line 120.

[0062] It should be noted that the input terminal of the first repair unit 131 and the output terminal of the second repair unit 132 can be used as the first terminal of the signal repair circuit 130, and the output terminal of the first repair unit 131 and the input terminal of the second repair unit 132 can be used as the second terminal of the signal repair circuit 130; that is, the first repair unit 131 amplifies the driving signal on the first repair line 110 and outputs it to the second repair line 120, and the second repair unit 132 amplifies the driving signal on the second repair line 120 and outputs it to the first repair line 110.

[0063] In one embodiment of this application, the first repair unit 131 and / or the second repair unit 132 includes: a comparator amplifier U0 and a MOSFET T0. The non-inverting input terminal of the comparator amplifier U0 is electrically connected to any repair line, and the inverting input terminal of the comparator amplifier U0 is connected to the reference voltage input terminal. The control terminal of the MOSFET T0 is connected to the output terminal of the comparator amplifier U0, the first terminal of the MOSFET T0 is connected to the timing signal output terminal, and the second terminal of the MOSFET T0 is electrically connected to another repair line.

[0064] It should be noted that the comparator amplifier includes a non-inverting input terminal, an inverting input terminal, a high-level terminal, a low-level terminal, and an output terminal. The non-inverting input terminal is connected to a patch line, the inverting input terminal is connected to the reference voltage input terminal, the high-level terminal is connected to the high-level output terminal, and the low-level terminal is connected to the low-level output terminal. Among them, the high level is equal to VGH in the drive signal output by the GOA unit, and the low level is equal to VGL in the drive signal output by the GOA unit.

[0065] In this embodiment, the comparator amplifier is triggered by the rising edge of the drive signal GN as a high level and by the falling edge of the drive signal GN as a low level. That is, when the input drive signal GN is greater than the reference voltage Vref, it outputs a high level VGH, and when the input drive signal GN is less than the reference voltage Vref, it outputs a low level VGL. In addition, the signal output by the comparator amplifier is chopped by the N-type MOSFET T0, so that the falling edge of the signal output from the second terminal of the MOSFET T0 is aligned with the falling edge of the abnormal level CK signal, avoiding the trailing phenomenon of the falling edge and preventing the problem of incorrect charging that cannot be repaired.

[0066] Additionally, it should be noted that the timing signal output terminal connected to the first terminal of MOSFET T0 is the timing signal corresponding to the GOA unit of the exception level. This can be understood as a multi-choice DIP switch connected to the first terminal of MOSFET T0. One end of the DIP switch is connected to multiple timing signals, and the other end of the DIP switch is connected to the first terminal of the MOSFET. Thus, the DIP switch outputs the corresponding CK signal according to the timing signal corresponding to the exception level.

[0067] In one embodiment of this application, the first repair unit 131 and / or the second repair unit 132 further includes: a first resistor R1, the first end of the first resistor R1 being electrically connected to any repair line, and the second end of the first resistor R1 being connected to the non-inverting input terminal of the comparator amplifier U0.

[0068] It should be noted that the first resistor R1 in this embodiment has a signal isolation function to prevent the internal components of the comparator amplifier from pulling down the input signal.

[0069] In one embodiment of this application, the first repair unit 131 and / or the second repair unit 132 further includes: a second resistor R2, the first end of the second resistor R2 being connected to the second end of the MOS transistor T0, and the second end of the second resistor R2 being electrically connected to another repair line.

[0070] It should be noted that the second resistor R2 in this embodiment is a sliding rheostat, which can adjust the falling edge time of the output signal to bring the waveform closer to the adjacent stage, reduce the difference with the adjacent stage, and improve the display effect of the panel.

[0071] In addition, this embodiment can also adjust the amplitude of the Gout signal output by the signal repair circuit by adjusting the high-level voltage VGH, and adjust the width of the Gout signal output by the signal repair circuit by adjusting the reference voltage Vref.

[0072] Therefore, the signal repair circuit provided in this embodiment can adjust its parameters in real time according to different application scenarios, thereby being compatible with various repair needs.

[0073] Secondly, this application provides a display panel including a display area and a non-display area. The display area includes multiple scan lines. The non-display area includes a first gate driving circuit located on a first side of the display area and a second gate driving circuit located on a second side of the display area. The non-display area also includes at least one set of driving circuit repair devices as described in the above embodiments.

[0074] It should be noted that in this application, if any level of GOA unit in the display panel needs to be repaired, one set of drive circuit repair devices is required; if any two levels of GOA unit in the display panel need to be repaired, two sets of drive circuit repair devices are required, and so on. The corresponding number of drive circuit repair devices is set according to the size and yield of the display panel.

[0075] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0076] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A drive circuit repair device, characterized in that, Applied to a display panel, the display panel includes a display area, a first gate driving circuit located on a first side of the display area, a second gate driving circuit located on a second side of the display area, and multiple scan lines; the driving circuit repair device includes: The first repair line is disposed between the first gate driving circuit and the display area, and is disposed in a different layer with the multiple scan lines; The second repair line is disposed between the second gate driving circuit and the display area, and is disposed in a cross-layer manner with the multiple scan lines; A signal repair circuit, wherein a first end of the signal repair circuit is electrically connected to the first repair line and a second end of the signal repair circuit is electrically connected to the second repair line, is used to repair the driving signal introduced on the second repair line when the nth level GOA unit of the first gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the first side of the display area through the first repair line, and is also used to repair the driving signal introduced on the first repair line when the nth level GOA unit of the second gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the second side of the display area through the second repair line.

2. The drive circuit repair device according to claim 1, characterized in that, The drive circuit repair device also includes: The third repair line is disposed between the first repair line and the display area, and is disposed in a cross-layer manner with the multiple scan lines; the third repair line is also electrically connected to the second terminal of the signal repair circuit; The signal repair circuit is also used to repair the driving signal introduced on the first repair line when the nth stage GOA unit of the second gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the second side of the display area through the second repair line, and drives the nth scan line on the first side of the display area through the third repair line; wherein, the driving signal introduced on the first repair line is the driving signal output by the nth stage GOA unit of the first gate driving circuit.

3. The drive circuit repair device according to claim 2, characterized in that, The drive circuit repair device also includes: The fourth repair line is disposed between the second repair line and the display area, and is disposed at an interlayer intersection with the multiple scan lines; the fourth repair line is also electrically connected to the first end of the signal repair circuit. The signal repair circuit is also used to repair the driving signal introduced on the second repair line when the nth stage GOA unit of the first gate driving circuit malfunctions, so that the repaired driving signal drives the nth scan line on the first side of the display area through the first repair line, and drives the nth scan line on the second side of the display area through the fourth repair line; wherein, the driving signal introduced on the second repair line is the driving signal output by the nth stage GOA unit of the second gate driving circuit.

4. The drive circuit repair device according to claim 3, characterized in that, The first gate drive circuit and the second gate drive circuit include multiple GOA units, each GOA unit including a stage transmission output terminal and a drive output terminal. The drive circuit repair device further includes: At least one cascade repair line, wherein the first end of the cascade repair line is arranged in a cross-layer configuration with the cascade output end, and the second end of the cascade repair line is arranged in a cross-layer configuration with the drive output end.

5. The drive circuit repair device according to claim 4, characterized in that, The drive circuit repair device also includes: Multiple laser connection points are located at the intersections of the first repair line, the second repair line, the third repair line, and the fourth repair line with multiple scan lines, at the intersection of the stage transmission repair line with the stage transmission output end, and at the intersection of the stage transmission repair line with the drive output end.

6. The drive circuit repair device according to claim 1, characterized in that, The signal repair circuit includes: A first repair unit, wherein the input terminal of the first repair unit is electrically connected to the first repair line and the output terminal of the first repair unit is electrically connected to the second repair line, is used to amplify the signal on the first repair line; The second repair unit has its input terminal electrically connected to the second repair line and its output terminal electrically connected to the first repair line, and is used to amplify the signal on the second repair line.

7. The drive circuit repair device according to claim 6, characterized in that, The first repair unit and / or the second repair unit include: A comparator amplifier, wherein the non-inverting input terminal of the comparator amplifier is electrically connected to any repair line, and the inverting input terminal of the comparator amplifier is connected to the reference voltage input terminal; The MOS transistor has its control terminal connected to the output terminal of the comparator amplifier, its first terminal connected to the timing signal output terminal, and its second terminal electrically connected to another repair line.

8. The drive circuit repair device according to claim 7, characterized in that, The first repair unit and / or the second repair unit further include: A first resistor, the first end of which is electrically connected to any of the repair lines, and the second end of which is connected to the non-inverting input of the comparator amplifier.

9. The drive circuit repair device according to claim 7, characterized in that, The first repair unit and / or the second repair unit further include: The second resistor has its first end connected to the second end of the MOS transistor, and its second end electrically connected to another repair line.

10. A display panel, comprising a display area and a non-display area, the display area comprising a plurality of scan lines; the non-display area comprising a first gate driving circuit located on a first side of the display area and a second gate driving circuit located on a second side of the display area, characterized in that, The non-display area also includes at least one set of drive circuit repair devices according to any one of claims 1 to 9.

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