Driving circuit repairing device and display panel

Abstract

The invention 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; the second repairing line is arranged between the second gate driving circuit and the display area; the third repairing line is arranged between the first repairing line and the display area; and the signal repairing circuit is 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, meanwhile, the nth scanning line on the first side of the display area is driven through the third repairing line; according to the invention, the consistency of the repairing signal is ensured while the abnormal GOA unit is repaired, and the repairing precision is improved.

Description

Technical Field

[0001] The present disclosure belongs to the field of display drive technology, and in particular relates to a drive circuit repair device and a display panel. Background Art

[0002] The gate drive circuit used in the display panel includes multiple cascaded GOA (Gate on Array) units. The output signal generated by each GOA unit not only provides a turn-on voltage for the pixel unit in the current row, but also serves as the pull-up signal and pull-down signal for the previous and next stage GOA units. Therefore, the abnormality of a single GOA unit not only affects the display output of the current stage, but also affects the output of the stage transmission signal, resulting in abnormal outputs of the remaining GOA units, causing display abnormalities on the entire screen and affecting the production yield of the display panel.

[0003] It can be seen that how to repair the abnormal gate drive circuit is a problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a driving circuit repair device and a display panel to solve the problem of repairing an abnormal gate driving circuit. The present application repairs an abnormal GOA unit while ensuring the consistency of the repair signal and improving the repair accuracy.

[0005] In a first aspect, the present application provides a driving circuit repair device, which is applied to a display panel, wherein 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 a plurality of scan lines; the repair device includes: a first repair line, which is arranged between the first gate driving circuit and the display area and is arranged to cross the plurality of scan lines at different layers; a second repair line, which is arranged between the second gate driving circuit and the display area and is arranged to cross the plurality of scan lines at different layers; a third repair line, which is arranged between the first repair line and the display area and is arranged to cross the plurality of scan lines at different layers A signal repair circuit is provided, wherein the first end of the signal repair circuit is electrically connected to the first repair line, and the second end of the signal repair circuit is electrically connected to the second repair line and the third repair line respectively, and is used for repairing the driving signal introduced on the first repair line when an abnormality occurs in the n-th level GOA unit of the second gate driving circuit, so that the repaired driving signal drives the n-th scanning line on the second side of the display area through the second repair line, and drives the n-th scanning 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 n-th level GOA unit of the first gate driving circuit.

[0006] Optionally, the repair device also includes: a fourth repair line, which is arranged between the second repair line and the display area and is cross-arranged with the multiple scan lines in a different layer; 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 drive signal introduced on the second repair line when an abnormality occurs in the n-th level GOA unit of the first gate drive circuit, so that the repaired drive signal drives the n-th scan line on the first side of the display area through the first repair line, and drives the n-th scan line on the second side of the display area through the fourth repair line; wherein the drive signal introduced on the second repair line is the drive signal output by the n-th level GOA unit of the second gate drive circuit.

[0007] Optionally, the signal repair circuit includes: a first repair unit, the input end of the first repair unit serves as the first end of the signal repair circuit, and the output end of the first repair unit serves as the second end of the signal repair circuit, and is used to repair the drive signal introduced on the repair line connected to the input end of the first repair unit; a second repair unit, the input end of the second repair unit serves as the second end of the signal repair circuit, and the output end of the second repair unit serves as the first end of the signal repair circuit, and is used to repair the drive signal introduced on the repair line connected to the input end of the second repair unit.

[0008] Optionally, the first repair unit and the second repair unit include: a comparison amplifier, a MOS tube, an isolation resistor and an adjustment resistor; the non-phase input terminal of the comparison amplifier is electrically connected to the first repair line or the second repair line through the isolation resistor, and the inverting input terminal of the comparison amplifier is connected to the reference voltage input terminal; a MOS tube, the control terminal of the MOS tube is connected to the output terminal of the comparison amplifier, the first terminal of the MOS tube is connected to the clock signal output terminal, and the second terminal of the MOS tube is electrically connected to the third repair line or the fourth repair line through the adjustment resistor.

[0009] Optionally, the first repair unit and the second repair unit include: a chopping module, the first end of the chopping module serves as the input end of the repair unit, the second end of the chopping module is connected to the clock signal output end, and is used to chop the input drive signal; a noise reduction module, the input end of the noise reduction module is connected to the third end of the chopping module, and is used to reduce the noise of the signal output by the chopping module; an amplification module, the input end of the amplification module is connected to the output end of the noise reduction module, and is used to amplify the signal output by the noise reduction module; a voltage limiting module, the output end of the voltage regulating module is connected to the high potential end of the amplification module, and is used to control the high potential output by the amplification module; an adjustment module, the input end of the adjustment module is connected to the output end of the amplification module, and the output end of the adjustment module serves as the output end of the repair unit, and is used to adjust the falling edge time of the output signal of the amplification module.

[0010] Optionally, the chopping module includes: a first switch tube, the control end of the first switch tube is the first end of the chopping module, the first end of the first switch tube is the second end of the chopping module, and the second end of the first switch tube is the third end of the chopping module.

[0011] Optionally, the noise reduction module includes: a second switch tube, wherein the control end of the second switch tube is connected to the first end of the chopping module, and the first end of the second switch tube is connected to the first power supply output end; a third switch tube, wherein the control end of the third switch tube is connected to the control end of the second switch tube, the first end of the third switch tube is connected to the second end of the second switch tube, and the second end of the third switch tube is connected to the second power supply output end; and a fourth switch tube, wherein the control end of the fourth switch tube is connected to the first end of the third switch tube, the first end of the fourth switch tube is connected to the output end of the chopping module, and the second end of the fourth switch tube is connected to the second power supply output end; wherein the first end of the fourth switch tube serves as the output end of the noise reduction module.

[0012] Optionally, the amplification module includes: a first amplifier, a first resistor and a second resistor; the non-phase input terminal of the first amplifier is connected to the output terminal of the noise reduction module, the inverting input terminal of the first amplifier is grounded through the first resistor, the inverting input terminal of the first amplifier is also connected to the output terminal of the first amplifier through the second resistor, the high level terminal of the first amplifier is connected to the output terminal of the voltage limiting unit, the low level terminal of the first amplifier is connected to the second power supply output terminal, and the output terminal of the first amplifier serves as the output terminal of the amplification module.

[0013] Optionally, the voltage limiting module includes: a third resistor, a first end of the third resistor is connected to the first power supply output end, and a second end of the third resistor is connected to the high level end of the amplification module; a fourth resistor, a first end of the fourth resistor is connected to the second end of the third resistor, and a second end of the fourth resistor is connected to the second power supply output end.

[0014] Optionally, the regulating module includes: a fifth resistor, a first end of the fifth resistor is connected to the output end of the amplifying module, and a second end of the fifth resistor serves as the output end of the regulating module; and a capacitor, a first end of the capacitor is connected to the second end of the fifth resistor, and a second end of the capacitor is connected to the second power supply output end.

[0015] Optionally, the noise reduction module includes: a second amplifier, an inverting input terminal of the second amplifier is connected to the first terminal of the chopping module, a non-inverting input terminal of the second amplifier is connected to the reference voltage input terminal, a high level terminal of the second amplifier is connected to the first power supply output terminal, and a low level terminal of the second amplifier is connected to the second power supply terminal; a fifth switch tube, a control terminal of the fifth switch tube is connected to the output terminal of the second amplifier, a first terminal of the fifth switch tube is connected to the third terminal of the chopping unit, a second terminal of the fifth switch tube is connected to the second power supply output terminal, and a first terminal of the fifth switch tube serves as the output terminal of the noise reduction module.

[0016] In a second aspect, the present application provides a display panel comprising a display area and a non-display area, wherein the display area comprises a plurality of scan lines; the non-display area comprises 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, and the non-display area also comprises at least one set of driving circuit repair devices.

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

[0018] The present application sets multiple repair lines on both sides of the display area. When there is an abnormality in the n-th level GOA unit of the second gate driving circuit, the driving signal output by the normal side GOA unit is introduced into the signal repair circuit for repair processing through the repair line on the normal side, so that the repaired driving signal drives the n-th scanning line through the repair lines on both sides of the display area at the same time, so that the driving signals input to both ends of the n-th scanning line are the same signal output from the signal repair circuit, which realizes the repair of the abnormal GOA unit while ensuring the consistency of the repair signal, thereby improving the repair accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0020] Figure 1 Shown is a schematic structural diagram of a drive circuit repair device provided in an embodiment of the present application.

[0021] Figure 2 Shown is a first repair schematic diagram provided in an embodiment of the present application.

[0022] Figure 3 Shown is a second repair schematic diagram provided in an embodiment of the present application.

[0023] Figure 4 The third repair schematic diagram provided in the embodiment of the present application is shown.

[0024] Figure 5 Shown is a fourth repair schematic diagram provided in an embodiment of the present application.

[0025] Figure 6 Shown is a schematic structural diagram of another drive circuit repair device provided in an embodiment of the present application.

[0026] Figure 7 Shown is a circuit diagram of a GOA unit provided in an embodiment of the present application.

[0027] Figure 8 Shown is a structural schematic diagram of a signal repair circuit provided in an embodiment of the present application.

[0028] Fig. 9 Shown is a circuit diagram of the first repair unit provided in an embodiment of the present application.

[0029] Fig.10 Shown is a circuit diagram of a second repair unit provided in an embodiment of the present application.

[0030] Fig.11 Shown is a schematic diagram of input and output waveforms of a chopping module provided in an embodiment of the present application.

[0031] Fig.12 Shown is a schematic diagram of input and output waveforms of a noise reduction module provided in an embodiment of the present application.

[0032] Fig.13 Shown is a schematic diagram of input and output waveforms of an amplification module provided in an embodiment of the present application.

[0033] Fig.14 The figure shows a schematic diagram of input and output waveforms of a regulation module provided in an embodiment of the present application.

[0034] Fig.15 Shown is a circuit diagram of a third repair unit provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 10. Display panel; 100. Driving 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. Level transmission repair line; 170. Laser connection point; U0. Comparison amplifier; T0. MOS tube; R0. Isolation resistor; VR. Adjustment resistor;

[0037] 1311, chopping module; 1312, noise reduction module; 1313, amplification module; 1314, voltage limiting module; 1315, regulation module; T1, first switch tube; T2, second switch tube; T3, third switch tube; T4, fourth switch tube; T5, fifth switch tube; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; C1, capacitor; OP1, first amplifier; OP2, second amplifier;

[0038] 200, display area; 300, first gate driving circuit; 400, second gate driving circuit; 500, scanning line; 600, PCB board. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0040] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0041] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application 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 are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0042] In a first aspect, the present application provides a gate driving circuit, which specifically includes the following embodiments:

[0043] Figure 1 FIG. 1 is a schematic diagram of the structure of a drive circuit repair device provided in an embodiment of the present application; Figure 1 As shown, the driving circuit repair device 100 is applied to a display panel 10, and 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 a first side of the display area 200, a second gate driving circuit 400 located on a second side of the display area 200, and a PCB board 600 located on the lower side of the display area 200, and the display area 200 includes an array-arranged pixel circuit, and the pixel circuit is connected to the first gate driving circuit 300 and the second gate driving circuit 400 on both sides through a plurality of scanning lines 500; in addition, the first gate driving circuit 300 includes a plurality of cascaded GOA units, and the second gate driving circuit 400 includes a plurality of cascaded GOA units; the two ends of the plurality of scanning lines 500 are electrically connected to the plurality of cascaded GOA units in the first gate driving circuit 300 and the plurality of cascaded GOA units in the second gate driving circuit 400, respectively; wherein, the first side of the display area 200 may be the left side of the display area 200, and the second side of the display area 200 may be the right side of the display area 200.

[0044] like Figure 1 As shown, the driving circuit repair device 100 in this embodiment includes a first repair line 110, which is arranged between the first gate driving circuit 300 and the display area 200, and is arranged in a different layer and crossed with multiple scanning lines 500; wherein, the different layer crossing arrangement means crossing but not connected, that is, the first repair line 110 and the scanning line 500 between the first gate driving circuit 300 and the display area 200 are arranged on different wiring layers, but there is an intersection in the orthographic projection on the wiring layer; in order to ensure the isolation of the first repair line 110 and the scanning line 500, an insulating layer is arranged between the two wiring layers for isolation, and the electrical connection between the first repair line 110 and the corresponding scanning line 500 can be achieved by welding the intersection.

[0045] The driving circuit repair device 100 in this embodiment also includes a second repair line 120, which is arranged between the second gate driving circuit 400 and the display area 200, and is arranged in a different layer and cross-arranged with multiple scanning lines 500; wherein the second repair line 120 and the first repair line 110 are different only in the setting position, and the setting method is the same, which will not be repeated here.

[0046] The driving device in this embodiment also includes a signal repair circuit 130 arranged on the PCB board 600, and 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 amplify the driving signal introduced on the second repair line 120 and repair the abnormal level in the first gate driving circuit 300 through the first repair line 110 when an abnormality occurs in the GOA unit of any level in the first gate driving circuit 300; it is also used to amplify the driving signal introduced on the first repair line 110 and repair the abnormal level in the second gate driving circuit 400 through the second repair line 120 when an abnormality occurs in the GOA unit of any level in the second gate driving circuit 400.

[0047] In one embodiment, taking the case where the nth stage GOA unit in the second gate driving circuit 400 is abnormal as an example, a specific repair example of the driving circuit repairing device 100 is as follows: Figure 2 As shown: first, the scanning line 500 between the second repair line 120 and the second gate driving circuit 400 is cut off by laser; secondly, the intersection of the first repair line 110 and the n-th scanning line 500 is welded, and the intersection of the second repair line 120 and the n-th scanning line 500 is welded, so that the driving signal output by the n-th level GOA unit in the first gate driving circuit 300 is introduced to the first repair line 110 to the signal repair circuit 130; then, due to the voltage drop on the first repair line 110 and the second repair line 120, the signal repair circuit 130 amplifies the drive on the first repair line 110 and then outputs it to the second repair line 120, so that the driving signal on the second repair line 120 drives the n-th scanning line 500, thereby repairing the n-th level GOA unit in the second gate driving circuit 400.

[0048] Among them, the purpose of cutting off the connection between the first repair line 110 and the second gate drive circuit 400 is to prevent the abnormal signal output by the GOA unit from interfering with the first repair line 110. It can be cut off under the premise that there is no interference signal; in addition, there is no need to cut off the connection when repairing the stage transmission through the signal on the repair line. The cutting effect and method in the following embodiments are the same as here and will not be repeated later.

[0049] In another embodiment, taking the case where the nth stage GOA unit in the first gate driving circuit 300 is abnormal as an example, a specific repair example of the driving circuit repairing device 100 is as follows: Figure 3 As shown: first, the scanning line 500 between the first repair line 110 and the first gate driving circuit 300 is cut off by laser; secondly, the intersection of the first repair line 110 and the n-th scanning line 500 is welded, and the intersection of the second repair line 120 and the n-th scanning line 500 is welded, so that the driving signal output by the n-th level GOA unit in the second gate driving circuit 400 is introduced to the second repair line 120 to the signal repair circuit 130; then, due to the voltage drop on the first repair line 110 and the second repair line 120, the signal repair circuit 130 amplifies the driving signal on the second repair line 120 and then outputs it to the first repair line 110, so that the driving signal on the first repair line 110 drives the n-th scanning line 500, thereby repairing the n-th level GOA unit in the first gate driving circuit 300 and reducing the difference in driving signals on both sides of the n-th scanning line 500, thereby meeting the picture repair accuracy of the display panel 10.

[0050] It should also be noted that, after the driving signal of the abnormal level GOA unit is repaired, the level transmission signal of the abnormal GOA unit can be repaired through the driving signal, and the specific repair method is explained in the following embodiments.

[0051] The present application sets a repair line on both sides of the display area 200. When there is an abnormality in any level of GOA unit, 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, so that the signal repair circuit 130 amplifies the introduced driving signal and then drives the corresponding scanning line 500 through the repair line on the abnormal side. While repairing the abnormal GOA unit, the difference in the driving signals on both sides can be reduced to meet the picture display effect.

[0052] In one embodiment of the present application, the repair device also includes a third repair line 140, which is arranged between the first repair line 110 and the display area 200 and is arranged in a different layer and cross-arranged with multiple scan lines 500; the third repair line 140 is also electrically connected to the second end of the signal repair circuit 130.

[0053] It should be noted that in order to further maintain the synchronization of the driving signals on both sides, the present embodiment uses the second repair line 120 to repair the abnormal level in the second gate driving circuit 400 using the driving signal output by the signal repair circuit 130, and also uses the third repair line 140 to simultaneously drive the scanning line 500 of the corresponding level in the first gate driving circuit 300 using the driving signal output by the signal repair circuit 130, so that the driving signals input to both ends of the nth scanning line 500 are the same signal output from the signal repair circuit 130, thereby ensuring the consistency of the repair signal and improving the repair accuracy.

[0054] For example, taking the case where the nth level GOA unit in the second gate driving circuit 400 is abnormal, the repair example is as follows: Figure 4 As shown: first, the scanning line 500 between the second repair line 120 and the second gate driving circuit 400 is cut off by laser, and the scanning line 500 between the first repair line 110 and the third repair line 140 is cut off; secondly, the intersection of the first repair line 110 and the n-th scanning line 500 is welded, the intersection of the second repair line 120 and the n-th scanning line 500 is welded, and the intersection of the third repair line 140 and the n-th scanning line 500 is welded, so that the driving signal output by the n-th level GOA unit in the first gate driving circuit 300 is introduced to the first repair line 110 to the signal repair circuit 130; then, the signal repair circuit 130 amplifies the driving signal on the first repair line 110 and then outputs it to the second repair line 120 and the third repair line 140, so that the driving signal on the second repair line 120 and the driving signal on the third repair line 140 drive the n-th scanning line 500 at the same time, thereby maintaining the consistency of the repair signal.

[0055] In another embodiment of the present application, the repair device further includes: a fourth repair line 150, which is arranged between the second repair lines and the display area 200 and is arranged in a different layer and cross-arranged with the plurality of scan lines 500; the fourth repair line 150 is also electrically connected to the first end of the signal repair circuit 130.

[0056] It should be noted that, taking the abnormality of the nth stage GOA unit in the first gate driving circuit 300 as an example, the repair example is as follows: Figure 5As shown: first, the scanning line 500 between the first repair line 110 and the first gate driving circuit 300 is cut off by laser, and the scanning line 500 between the second repair line 120 and the fourth repair line 150 is cut off; secondly, the intersection of the first repair line 110 and the n-th scanning line 500 is welded, the intersection of the second repair line 120 and the n-th scanning line 500 is welded, and the intersection of the fourth repair line 150 and the n-th scanning line 500 is welded, so that the driving signal output by the n-th level GOA unit in the second gate driving circuit 400 is introduced to the second repair line 120 to the signal repair circuit 130; then, the signal repair circuit 130 amplifies the driving signal on the second repair line 120 and then outputs it to the first repair line 110 and the fourth repair line 150, so that the driving signal on the first repair line 110 and the driving signal on the fourth repair line 150 drive the n-th scanning line 500 at the same time, thereby maintaining the consistency of the repair signal.

[0057] In practical applications, the driving circuit repairing device 100 may include only the third repairing line 140 , or only the fourth repairing line 150 , or may include both the third repairing line 140 and the fourth repairing line 150 .

[0058] It should also be noted that Figure 4 and Figure 5 The normal side of the GOA abnormal level is connected to the repair line by laser, led out to the PCB board 600, and then reintroduced into the normal side and abnormal side of the abnormal level for driving after enhanced amplification by the signal repair circuit 130; the present application can also drive the normal side and abnormal side of the abnormal level by the adjacent output signal of the abnormal level, and the wiring method of the repair line is the same, except that the laser connection point 170 is different; therefore, based on the wiring structure of the driving circuit repair device 100 provided in the present application, by combining the laser connection point 170 in different ways, a variety of repair methods and application scenarios can be met.

[0059] In one embodiment of the present application, the first gate drive circuit 300 and the second gate drive circuit 400 include multiple GOA units, the GOA units include a level transmission output terminal and a drive output terminal, and the repair device also includes: at least one level transmission repair line 160, the first end of the level transmission repair line 160 is cross-arranged at a different layer from the level transmission output terminal, and the second end of the level transmission repair line 160 is cross-arranged at a different layer from the drive output terminal.

[0060] It should be noted that the GOA unit generally includes a driving output terminal for outputting a driving signal and a level transmission output terminal for outputting a level transmission signal. The driving signal and the level transmission signal are signals with the same waveform and phase, but have different output ports and functions. Figure 6 and Figure 7As shown, when both the level transmission output and the driving output of the nth level GOA unit are abnormal, that is, Figure 7 When both transistor T2 and transistor T5 in the n-th level GOA unit are abnormal, the n-th level GOA unit cannot normally output the driving signal and the level transmission signal, affecting the normal output of other level GOA units; here, this embodiment sets a level transmission repair line 160 in each GOA unit, so that one end of the level transmission repair line 160 is set at a different layer and crosses with the level transmission output end, and the other end is set at a different layer and crosses with the driving output end; when laser welding is performed on the two ends of the level transmission repair line, the driving signal successfully repaired by the repair line can be repaired to the level transmission output end through the level transmission repair line 160.

[0061] like Figure 7 As shown, the transistors T1, T2 and T5 in the GOA unit are functional units. The level transfer signal FN generated by the transistor T5 is responsible for the level transfer relationship (precharge + pull-down) of the GOA unit. The driving signal GN generated by the transistor T2 is responsible for entering the display area 200 and driving the TFT in the pixel circuit to open or close. The Q point signal generated by the transistor T1 is the gate signal of the driving signal GN generated by the transistor T2. The function of the transistor T3 is to pull down the Q point, and the function of the transistor T4 is to pull down the driving signal G. N; Assuming that the transistor T5 on the left side (on both sides) is abnormal and cannot generate the level transmission signal FN, the gates of the transistors T1, T3 and T4 will be abnormal, affecting the level transmission, and the display area 200 will have bright and dark lines; FN and GN are the same signal, the only difference is that FN does not enter the display area 200, but only plays the level transmission function; X in G(NX) / F(NX) means that the front X stages of the GN stage are responsible for precharging the Q point, and Y in F(N+Y) means that the rear Y stages of the GN stage are responsible for pulling down the Q point and the GN signal;

[0062] The repair method of this embodiment is: disconnect the three-pole signal (CK signal, QN signal, FN signal) of the transistor T5, and short-circuit the level transmission output end and the drive output end by welding the two laser connection points 170 on the level transmission repair line 160, so as to ensure that the repaired drive signal replaces the level transmission signal for level transmission, thereby achieving the effect of repairing the drive signal and the level transmission signal at the same time.

[0063] Therefore, the driving circuit repairing device 100 of the present application can not only repair the driving signal of the gate driving circuit through the repair line, but also repair the level transmission signal in the gate driving circuit through the level transmission repair line 160 .

[0064] In one embodiment of the present application, the repair device also includes a plurality of laser connection points 170, which are arranged at the intersection points 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, at the intersection points of the level transmission repair line 160 and the level transmission output end, and at the intersection points of the level transmission repair line 160 and the drive output end; it should be noted that by welding the laser connection points 170, the short circuit between the repair lines at the intersections and the scan lines 500 or the output ports can be achieved.

[0065] In one embodiment, if Figure 8 As shown, the signal repair circuit 130 includes: a first repair unit 131 and a second repair unit 132, the input end of the first repair unit 131 is electrically connected to the first repair line 110, and the output end 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 end of the second repair unit 132 is electrically connected to the second repair line 120, and the output end 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.

[0066] It should be noted that the input end of the first repair unit 131 and the output end of the second repair unit 132 can be used as the first end of the signal repair circuit 130, and the output end of the first repair unit 131 and the input end of the second repair unit 132 can be used as the second end of the signal repair circuit 130; this is equivalent to the first repair unit 131 amplifying the driving signal on the first repair line 110 and outputting it to the second repair line 120, and the second repair unit 132 amplifying the driving signal on the second repair line 120 and outputting it to the first repair line 110.

[0067] Fig. 9 FIG. 1 is a circuit diagram of a first repair unit provided in an embodiment of the present application; Fig. 9 As shown, the first repair unit 131 and / or the second repair unit 132 of this embodiment include: a comparison amplifier U0 and a MOS tube T0, the non-phase input terminal of the comparison amplifier U0 is electrically connected to any one of the repair lines, and the inverting input terminal of the comparison amplifier U0 is connected to the reference voltage input terminal; the control terminal of the MOS tube T0 is connected to the output terminal of the comparison amplifier U0, the first terminal of the MOS tube T0 is connected to the clock signal output terminal, and the second terminal of the MOS tube T0 is electrically connected to another repair line.

[0068] It should be noted that the comparison 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 repair line, the inverting input terminal is connected to a reference voltage input terminal, the high level terminal is connected to a high level output terminal, and the low level terminal is connected to a low level output terminal; wherein the high level is equal to VGH in the driving signal output by the GOA unit, and the low level is equal to VGL in the driving signal output by the GOA unit.

[0069] The comparison amplifier in this embodiment uses the rising edge of the drive signal GN as a trigger high level and the falling edge of the drive signal GN as a trigger 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 comparison amplifier is chopped through the N-type MOS tube T0, so that the falling edge of the signal output from the second end of the MOS tube T0 is aligned with the falling edge of the abnormal level CK signal, avoiding the tailing phenomenon of the falling edge, so as to prevent the unrepairable wrong charging problem.

[0070] It should also be noted that the clock signal output end connected to the first end of the MOS tube T0 is a timing signal corresponding to the abnormal level GOA unit; it can be understood that a multiple-selection dial is connected to the first end of the MOS tube T0, one end of the dial is connected to multiple timing signals, and the other end of the dial is connected to the first end of the MOS tube, so that the dial output corresponding to the CK signal can be adjusted according to the timing signal corresponding to the abnormal level.

[0071] In one embodiment of the present application, the first repair unit 131 and / or the second repair unit 132 further include: an isolation resistor R0, a first end of the isolation resistor R0 is electrically connected to any one of the repair lines, and a second end of the isolation resistor R0 is connected to the non-inverting input end of the comparison amplifier U0.

[0072] It should be noted that the isolation resistor R0 in this embodiment has a signal isolation function to prevent the internal components of the comparison amplifier from pulling down the input signal.

[0073] In one embodiment of the present application, the first repair unit 131 and / or the second repair unit 132 further include: an adjustment resistor VR, a first end of the adjustment resistor VR is connected to the second end of the MOS tube T0, and a second end of the adjustment resistor VR is electrically connected to another repair line.

[0074] It should be noted that the regulating resistor VR in this embodiment is a sliding resistor, which can adjust the falling edge time of the output signal to adjust the waveform to be close to the adjacent level, reduce the difference with the adjacent level, and improve the display effect of the panel.

[0075] In addition, the present 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.

[0076] Therefore, the signal repair circuit provided in this embodiment can adjust parameters in real time according to different application scenarios, thereby being compatible with various repair requirements.

[0077] Fig.10 FIG. 1 is a circuit diagram of a second repair unit provided in an embodiment of the present application; Fig.10 As shown, the first repair unit and the second repair unit include: a chopping module 1311, a noise reduction module 1312, an amplifying module 1313, a voltage limiting module 1314 and an adjusting module 1315; the first end of the chopping module 1311 is used as the input end of the repair unit, and the second end of the chopping module 1311 is connected to the clock signal output end, for chopping the input drive signal; the input end of the noise reduction module 1312 is connected to the third end of the chopping module 1311, for denoising the signal output by the chopping module 1311; the input end of the amplifying module 1313 is connected to the output end of the noise reduction module 1312, for amplifying the signal output by the noise reduction module 1312; the output end of the voltage regulating module is connected to the high level end of the amplifying module 1313, for controlling the high potential output by the amplifying module 1313; the input end of the adjusting module 1315 is connected to the output end of the amplifying module 1313, and the output end of the adjusting module 1315 is used as the output end of the repair unit, for adjusting the falling edge time of the output signal of the amplifying module 1313.

[0078] It should be noted that if Fig.10 As shown, the chopping module 1311 receives the driving signal Gn and the clock signal CK to output the g1 signal. The g1 signal is affected by the joint action of Gn and CK, which limits the falling edge position to avoid the output waveform causing the repair level to be mischarged; the noise reduction module 1312 receives the Gn signal to output the p1 signal, and performs noise reduction processing on the g1 signal to avoid the noise from being transmitted to the amplification module 1313, thereby generating severe noise; the amplification module 1313 receives and amplifies the g1 signal, and outputs the g2 signal. The amplification factor can adjust the waveform to be closer to the square wave; the voltage limiting module 1314 outputs a voltage for adjusting the high-level voltage of g2; the adjustment module 1315 adds appropriate loading to the g2 signal to adjust the Gre signal to be closer to the normal signal.

[0079] In one embodiment, the chopping module 1311 includes: a first switch tube T1, the control end of the first switch tube T1 is the first end of the chopping module 1311, the first end of the first switch tube T1 is the second end of the chopping module 1311, and the second end of the first switch tube T1 is the third end of the chopping module 1311.

[0080] Specifically, the chopper module 1311 is mainly composed of a first switch tube T1 of an N-type MOS tube, whose gate is connected to Gn, that is, Gout on the normal side of the abnormal level, and whose drain is connected to a CK signal. The CK needs to select the same CK signal used by the abnormal level, such as Fig.11 The waveform diagram of Gn, CK and the output g1 signal is shown, wherein the output g1 signal is basically the same as Gn except for the falling edge, but its falling edge is aligned with the falling edge of the CK signal, thus avoiding the output phase shift caused by the existence of the falling edge, thereby avoiding the mischarging of the repair row.

[0081] In one embodiment, the noise reduction module 1312 includes: a second switch tube T2, a third switch tube T3 and a fourth switch tube T4, the control end of the second switch tube T2 is connected to the first end of the chopping module 1311, and the first end of the second switch tube T2 is connected to the first power supply output end; the control end of the third switch tube T3 is connected to the control end of the second switch tube T2, the first end of the third switch tube T3 is connected to the second end of the second switch tube T2, and the second end of the third switch tube T3 is connected to the second power supply output end; the control end of the fourth switch tube T4 is connected to the first end of the third switch tube T3, the first end of the fourth switch tube T4 is connected to the output end of the chopping module 1311, and the second end of the fourth switch tube T4 is connected to the second power supply output end; wherein the first end of the fourth switch tube T4 serves as the output end of the noise reduction module 1312.

[0082] It should be noted that the second switch tube T2 in the noise reduction module 1312 is a P-type MOS tube, the third switch tube T3 and the fourth switch tube T4 are N-type MOS tubes, and the second switch tube T2 and the third switch tube T3 form an inverter, that is, a NOT gate circuit, wherein the high and low potentials of the inverter are the first power supply voltage Vgh and the second power supply voltage VSS, and a p1 signal with a voltage opposite to Gn can be generated. The p1 signal is used as the gate, and the g1 signal is subjected to noise reduction processing through the fourth switch tube T4, and is pulled down to VSS during noise reduction, so as to avoid the Gn signal from being amplified and transmitted in the subsequent circuit during the extraction process and the noise at the first switch tube T1; wherein the waveforms of the input Gn and the output p1 signal are as shown in FIG. Fig.12 shown.

[0083] In one embodiment, the amplification module 1313 includes: a first amplifier OP1, a first resistor R1 and a second resistor R2; the non-phase input terminal of the first amplifier OP1 is connected to the output terminal of the noise reduction module 1312, the inverting input terminal of the first amplifier OP1 is grounded through the first resistor R1, and the inverting input terminal of the first amplifier OP1 is also connected to the output terminal of the first amplifier OP1 through the second resistor R2, the high level terminal of the first amplifier OP1 is connected to the output terminal of the voltage limiting unit, the low level terminal of the first amplifier OP1 is connected to the second power supply output terminal, and the output terminal of the first amplifier OP1 serves as the output terminal of the amplification module 1313.

[0084] It should be noted that the non-inverting input terminal of the first amplifier OP1 in the amplification module 1313 is connected to the g1 signal, and the output terminal is the g2 signal. The g2 signal is connected in series to VSS through the first resistor R1 and the second resistor R2, and the inverting input terminal is connected to the potential between the first resistor R1 and the second resistor R2. In this way, an OP amplifier is formed. Therefore, the amplifier amplifies the g1 signal by (R1+R2) / R1 times to obtain the g2 signal. The voltage limits of the OP device are Vlim and VSS respectively, so the high level of g2 will be limited to Vlim. Therefore, when the amplification factor is higher, the g2 waveform is closer to a square wave. The waveforms of the signals g1 and g2 before and after amplification are as follows: Fig.13 Shown

[0085] In one embodiment, the voltage limiting module 1314 includes: a third resistor R3 and a fourth resistor R4; the first end of the third resistor R3 is connected to the first power supply output end, and the second end of the third resistor R3 is connected to the high level end of the amplification module 1313; the first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is connected to the second power supply output end.

[0086] It should be noted that the Vgh voltage outputs a Vlim signal through the third resistor R3, and Vlim is connected to VSS via the fourth resistor R4. Therefore, through the voltage division of the third resistor R3 and the fourth resistor R4, Vlim can be adjusted between VSS and Vgh to control the high potential of the OP output, thereby avoiding bright lines caused by too high a high potential of the output waveform and weak lines caused by too low a high potential.

[0087] In one embodiment, the adjustment module 1315 includes: a fifth resistor R5 and a capacitor C1, the first end of the fifth resistor R5 is connected to the output end of the amplification module 1313, and the second end of the fifth resistor R5 serves as the output end of the adjustment module 1315; the first end of the capacitor C1 is connected to the second end of the fifth resistor R5, and the second end of the capacitor C1 is connected to the second power supply output end.

[0088] It should be noted that the g2 signal is connected in series to the output terminal via the fifth resistor R5 to obtain the Gre signal, and Gre is connected to the capacitor C1 to VSS to form an RC delay for g2 to adjust the waveform to be close to the normal signal. Fig.14 The figure shows the waveforms of the g1 signal and Gre signal before and after RC loading. The added RC loading avoids the display difference of the same normal level caused by the difference in falling time.

[0089] It can be seen that the settings of the first resistor R1 and the second resistor R2 in this embodiment can adjust the amplification factor, so that the output waveform is closer to a square wave and the high potential area is wider; the settings of the third resistor R3 and the fourth resistor R4 can adjust the high potential value of the output; the settings of the fifth resistor R5 and the capacitor C1 can adjust the output loading; therefore, the adjustment of these three dimensions makes the Gre waveform completely comparable to the waveform of the normal drive signal, so as to drive the abnormal level normally.

[0090] Fig.15 FIG. 4 is a circuit diagram of a third repair unit provided in an embodiment of the present application; Fig.15 As shown, the noise reduction module 1312 includes: a second amplifier OP2 and a fifth switch tube T5; the inverting input terminal of the second amplifier OP2 is connected to the first terminal of the chopping module 1311, the non-inverting input terminal of the second amplifier OP2 is connected to the reference voltage input terminal, the high level terminal of the second amplifier OP2 is connected to the first power supply output terminal, and the low level terminal of the second amplifier OP2 is connected to the second power supply terminal; the control terminal of the fifth switch tube T5 is connected to the output terminal of the second amplifier OP2, the first terminal of the fifth switch tube T5 is connected to the third terminal of the chopping unit, the second terminal of the fifth switch tube T5 is connected to the second power supply output terminal, and the first terminal of the fifth switch tube T5 serves as the output terminal of the noise reduction module 1312.

[0091] Fig.15 Another embodiment of the present application is shown. Except for the noise reduction module 1312, the configuration of the remaining modules is the same as Fig.10 Similarly, the noise reduction module 1312 of this embodiment includes a second amplifier OP2 and an N-type MOS tube fifth switch tube T5, wherein the inverting input terminal of the second amplifier OP2 is the Gn signal, and the non-inverting input terminal is the reference voltage Vref. The voltage limit of the second amplifier OP2 is set to Vgh and VSS respectively, and the output terminal is the p1 signal. Therefore, this connection mode is an inverting amplifier, and the waveform output logic relationship is the same as Fig.12 The same, but the output waveform is a strict square wave, which can also realize the function of the above inverter; the above Vref voltage should be as low as possible, so that the rising edge of the above square wave is closer to the front and the falling edge is closer to the back, so as to avoid the rising and falling edges of the g1 signal being cut off by the p1 signal, thereby affecting the g1 signal width and causing poor display. In addition, the Vref voltage is also between Vgh and VSS, so another voltage limiting module 1314 can be added here to provide it with a potential.

[0092] In the second aspect, the present application provides a display panel including a display area and a non-display area, the display area including a plurality of scanning lines; the non-display area including 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 including at least one group of driving circuit repair devices of the above-mentioned embodiments.

[0093] It should be noted that in the present application, if any level of GOA unit in the display panel needs to be repaired, a set of driving circuit repair devices is required; if any two levels of GOA units in the display panel need to be repaired, two sets of driving circuit repair devices are required, and so on. A corresponding number of driving circuit repair devices are set according to the size and yield of the display panel.

[0094] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0095] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this 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 a plurality of scanning lines; the driving circuit repairing device includes: A first repair line is arranged between the first gate driving circuit and the display area, and is arranged in a different layer and crosses with the plurality of scanning lines; A second repair line is arranged between the second gate driving circuit and the display area, and is arranged in a different layer and crosses with the plurality of scanning lines; A third repair line is arranged between the first repair line and the display area and is arranged in a different layer and crosses with the plurality of scanning lines; A signal repair circuit, wherein the first end of the signal repair circuit is electrically connected to the first repair line, and the second end of the signal repair circuit is electrically connected to the second repair line and the third repair line respectively, and is used to repair the drive signal introduced on the first repair line when an abnormality occurs in the n-th level GOA unit of the second gate drive circuit, so that the repaired drive signal drives the n-th scan line on the second side of the display area through the second repair line, and drives the n-th scan line on the first side of the display area through the third repair line; wherein the drive signal introduced on the first repair line is the drive signal output by the n-th level GOA unit of the first gate drive circuit.

2. The driving circuit repair device according to claim 1, characterized in that: The driving circuit repairing device further comprises: a fourth repair line, arranged between the second repair line and the display area, and arranged in a different layer and intersecting with the plurality of scanning 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 an abnormality occurs in the n-th level GOA unit of the first gate driving circuit, so that the repaired driving signal drives the n-th scanning line on the first side of the display area through the first repair line, and drives the n-th scanning 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 n-th level GOA unit of the second gate driving circuit.

3. The driving circuit repairing device according to claim 1, characterized in that: The signal repair circuit comprises: A first repair unit, wherein an input end of the first repair unit serves as a first end of the signal repair circuit, and an output end of the first repair unit serves as a second end of the signal repair circuit, and is used to perform repair processing on a drive signal introduced on a repair line connected to the input end of the first repair unit; A second repair unit, the input end of the second repair unit serves as the second end of the signal repair circuit, and the output end of the second repair unit serves as the first end of the signal repair circuit, and is used to repair the driving signal introduced on the repair line connected to the input end of the second repair unit.

4. The driving circuit repairing device according to claim 3, characterized in that: The first repair unit and the second repair unit include: Comparison amplifier, MOS tube, isolation resistor and adjustment resistor; The non-inverting input terminal of the comparison amplifier is electrically connected to the first repair line or the second repair line through the isolation resistor, and the inverting input terminal of the comparison amplifier is connected to the reference voltage input terminal; A MOS tube, wherein the control end of the MOS tube is connected to the output end of the comparison amplifier, the first end of the MOS tube is connected to the clock signal output end, and the second end of the MOS tube is electrically connected to the third repair line or the fourth repair line through the adjustment resistor.

5. The driving circuit repairing device according to claim 3, characterized in that: The first repair unit and the second repair unit include: A chopping module, wherein a first end of the chopping module serves as an input end of the repair unit, and a second end of the chopping module is connected to a clock signal output end, and is used to chop an input drive signal; A noise reduction module, wherein an input end of the noise reduction module is connected to the third end of the chopping module, and is used to reduce noise on a signal output by the chopping module; an amplifying module, the input end of which is connected to the output end of the noise reduction module, and is used to amplify the signal output by the noise reduction module; A voltage limiting module, wherein the output end of the voltage regulating module is connected to the high potential end of the amplifying module, and is used to control the high potential output by the amplifying module; An adjusting module, wherein the input end of the adjusting module is connected to the output end of the amplifying module, and the output end of the adjusting module serves as the output end of the repairing unit and is used to adjust the falling edge time of the output signal of the amplifying module.

6. The driving circuit repairing device according to claim 5, characterized in that: The chopping module comprises: A first switch tube, wherein the control end of the first switch tube is the first end of the chopping module, the first end of the first switch tube is the second end of the chopping module, and the second end of the first switch tube is the third end of the chopping module; Or / and, the noise reduction module comprises: A second switch tube, wherein a control end of the second switch tube is connected to a first end of the chopping module, and a first end of the second switch tube is connected to an output end of a first power supply; a third switch tube, wherein a control end of the third switch tube is connected to a control end of the second switch tube, a first end of the third switch tube is connected to a second end of the second switch tube, and a second end of the third switch tube is connected to a second power supply output end; A fourth switch tube, wherein the control end of the fourth switch tube is connected to the first end of the third switch tube, the first end of the fourth switch tube is connected to the output end of the chopping module, and the second end of the fourth switch tube is connected to the second power supply output end; wherein the first end of the fourth switch tube serves as the output end of the noise reduction module.

7. The driving circuit repairing device according to claim 5, characterized in that: The amplification module comprises: a first amplifier, a first resistor and a second resistor; The non-phase input terminal of the first amplifier is connected to the output terminal of the noise reduction module, the inverting input terminal of the first amplifier is grounded through the first resistor, the inverting input terminal of the first amplifier is also connected to the output terminal of the first amplifier through the second resistor, the high level terminal of the first amplifier is connected to the output terminal of the voltage limiting unit, the low level terminal of the first amplifier is connected to the second power supply output terminal, and the output terminal of the first amplifier serves as the output terminal of the amplification module.

8. The driving circuit repairing device according to claim 5, characterized in that: The voltage limiting module comprises: A third resistor, wherein a first end of the third resistor is connected to the first power supply output end, and a second end of the third resistor is connected to the high level end of the amplification module; a fourth resistor, wherein a first end of the fourth resistor is connected to a second end of the third resistor, and a second end of the fourth resistor is connected to an output end of a second power supply; Or / and, the adjustment module includes: a fifth resistor, wherein a first end of the fifth resistor is connected to the output end of the amplifying module, and a second end of the fifth resistor serves as the output end of the regulating module; A capacitor, wherein a first end of the capacitor is connected to a second end of the fifth resistor, and a second end of the capacitor is connected to an output end of a second power supply.

9. The driving circuit repairing device according to claim 5, characterized in that: The noise reduction module comprises: a second amplifier, wherein an inverting input terminal of the second amplifier is connected to the first terminal of the chopping module, a non-inverting input terminal of the second amplifier is connected to a reference voltage input terminal, a high level terminal of the second amplifier is connected to the first power supply output terminal, and a low level terminal of the second amplifier is connected to the second power supply terminal; A fifth switch tube, wherein the control end of the fifth switch tube is connected to the output end of the second amplifier, the first end of the fifth switch tube is connected to the third end of the chopping unit, the second end of the fifth switch tube is connected to the second power supply output end, and the first end of the fifth switch tube serves as the output end of the noise reduction module.

10. A display panel, comprising a display area and a non-display area, wherein the display area comprises a plurality of scan lines; the non-display area comprises 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, wherein: The non-display area also includes at least one set of driving circuit repair devices according to any one of claims 1 to 9.

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