Driving circuit, display panel, display device and driving circuit repair method

Abstract

A driving circuit, a display panel, a display device and a repair method for the driving circuit, wherein the driving circuit comprises N scanning lines, a detection module and a compensation module, wherein the detection module comprises a first detection line and N first thin film transistors, wherein the drains of the N first thin film transistors are electrically connected to the first detection line, and the sources and gates of the N first thin film transistors are electrically connected to the N scanning lines in a one-to-one correspondence, and the compensation module is electrically connected to the detection module, wherein the first detection line is used to output the first high level of the N scanning lines in sequence, and the compensation module is used to output the first high level to the broken scanning line, wherein N is a positive integer, thereby realizing automatic confirmation of the position and corresponding timing of the broken scanning line, without the need to check the N scanning lines one by one, thereby improving the repair efficiency and product yield.

Description

Technical Field

[0001] The present invention relates to the technical field of display panels, and in particular to a driving circuit, a display panel, a display device and a repair method for the driving circuit. Background Art

[0002] Liquid crystal display (TFT-LCD) is a flat panel display device that is increasingly used in the field of high-performance display due to its small size, low power consumption, no radiation, and relatively low production cost. During the production, transportation, and use of the display, the scanning line may be broken due to external factors such as high temperature, collision, and water ingress, which requires detection and repair of the broken scanning line.

[0003] In the prior art, the broken scanning lines are usually detected by collecting scanning signals of all scanning lines, and then the broken scanning lines are repaired, which leads to the problem of slow detection speed. Summary of the invention

[0004] The purpose of the present invention is to provide a driving circuit, a display panel, a display device and a repair method for the driving circuit, so as to solve the problem that in the prior art, broken scanning lines are usually detected by collecting scanning signals of all scanning lines and then the broken scanning lines are repaired, resulting in slow detection speed.

[0005] To achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a driving circuit, comprising: N scan lines; a detection module, comprising a first detection line and N first thin film transistors, the drains of the N first thin film transistors are all electrically connected to the first detection line, and the sources and gates of the N first thin film transistors are all electrically connected to the N scan lines in a one-to-one correspondence; a compensation module, electrically connected to the detection module; wherein the first detection line is used to output the first high level of the N scan lines in sequence, and the compensation module is used to connect to the broken scan line and output the first high level thereto, wherein N is a positive integer.

[0007] In one implementation, the detection module further includes a first processor, and the first detection line and the compensation module are both electrically connected to the first processor.

[0008] In one embodiment, the driving circuit also includes a threshold power supply, and the detection module also includes a first comparator, the negative input terminal of the first comparator is electrically connected to the threshold power supply, the positive input terminal of the first comparator is electrically connected to the first detection line, and the output terminal of the first comparator is electrically connected to the first processor.

[0009] In one embodiment, the compensation module includes a first compensation line and a second processor, the second processor is connected to the first compensation line and the first processor, the first compensation line is used to connect to the broken scan line, and the second processor is used to output the first high level to the first compensation line.

[0010] In one embodiment, the N scanning lines each include a first end and a second end, the N first ends are electrically connected to the source and gate of the N first thin film transistors in a one-to-one correspondence, and the first compensation line is used to connect to the first end of the broken line; the detection module also includes a second detection line, N second thin film transistors and a third processor, the second detection line is connected to the third processor, the drains of the N second thin film transistors are electrically connected to the second detection line, and the N second ends are electrically connected to the source and gate of the N second thin film transistors in a one-to-one correspondence; the compensation module also includes a fourth processor and a second compensation line, the fourth processor is connected to the second compensation line and the third processor, the second compensation line is used to connect to the second end of the broken line, and the fourth processor is used to output the first high level to the second compensation line.

[0011] In a second aspect, the present invention further provides a display panel, comprising a plurality of pixels and a driving circuit as described in any one of the various implementations of the first aspect, wherein each of the scan lines is respectively connected to at least one of the pixels.

[0012] In a third aspect, the present invention further provides a display device, comprising a housing and a display panel according to any one of the embodiments of the second aspect, wherein the display panel is installed in the housing.

[0013] In a third aspect, the present invention further provides a repair method for a driving circuit, which is applied to the driving circuit described in any one of the various embodiments of the first aspect, comprising: a driving cycle of the driving circuit sequentially passes through a 1st time period, ..., an Mth time period... and an Nth time period, wherein M is a positive integer less than or equal to N; when the first detection line does not recognize that the Mth scan line outputs a first high level in the Mth time period, connecting the compensation module and the Mth scan line, and the compensation module outputs the first high level to the Mth scan line in the Mth time period, so that the Mth scan line outputs the first high level in the Mth time period.

[0014] In one embodiment, when the first detection line does not recognize that the Mth first end outputs the first high level in the Mth time period, the first compensation line is connected to the Mth first end, and the first compensation line outputs the first high level to the Mth first end in the Mth time period, so that the Mth first end outputs the first high level in the Mth time period.

[0015] In one embodiment, when the second detection line does not recognize that the Mth second end outputs the first high level in the Mth time period, the second compensation line is connected to the Mth second end, and the second compensation line outputs the first high level to the Mth second end in the Mth time period, so that the Mth second end outputs the first high level in the Mth time period.

[0016] By setting a detection module including a first detection line and N first thin film transistors, the drains of the N first thin film transistors are all electrically connected to the first detection line, the sources and gates of the N first thin film transistors are all electrically connected to the N scanning lines in a one-to-one correspondence, and the first detection line is used to output the first high electrical levels of the N scanning lines in sequence. When a scanning line is broken, the broken scanning line and the corresponding timing of the broken scanning line can be confirmed according to the change of the signal output by the first detection line. At the same time, a compensation module is set to be electrically connected to the detection module, and the compensation module is used to connect to the broken scanning line and output the first high electrical level to it, thereby realizing automatic confirmation of the position of the broken scanning line and the corresponding timing, without the need to check the N scanning lines one by one, thereby improving the repair efficiency and product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the display panel when it is displaying normally;

[0019] Figure 2 It is the potential diagram of the driving circuit when the display panel displays normally;

[0020] Figure 3 is a schematic diagram of the display panel when the Mth first end is disconnected;

[0021] Figure 4 is a schematic diagram of the display panel when the Mth second end is disconnected;

[0022] Figure 5 is a potential diagram of the driving circuit when the Mth first terminal or the second terminal is disconnected;

[0023] Figure 6 is a schematic diagram of a display panel when both the Mth first terminal and the Mth second terminal are disconnected;

[0024] Figure 7 3 is a potential diagram of the driving circuit when both the Mth first terminal and the Mth second terminal are disconnected.

[0025] Description of reference numerals:

[0026] 1000-display panel;

[0027] 100-driving circuit, A-display area, B-non-display area;

[0028] Gn-scanning line, 11-first end, 12-second end;

[0029] 20-detection module, 21-first detection line, 22-first processor, 23-second detection line, 24-third processor, Q1-first thin film transistor, Q2-second thin film transistor, C1-first comparator, C2-second comparator;

[0030] 30-compensation module, 31-first compensation line, 32-second processor, 33-second compensation line, 34-fourth processor;

[0031] 40-data line;

[0032] GOA-drive unit, XB-source driver board, IC-drive chip, FPC-flexible printed circuit board, SOC-processing chip, VSS1-threshold power supply, VSS2-power line, GND-ground line, P-pixel;

[0033] V1-first high level, V2-first signal;

[0034] T is driving cycle, t1 is the first period, tM is the Mth period, and tN is the Nth period. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0037] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or N related listed items.

[0038] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] Please refer to Figure 1 The present invention provides a display device, including a housing and a display panel 1000 in an embodiment of the present invention, and the display panel 1000 is installed in the housing. The display device can be an electronic reader, an electronic book, a display, a mobile phone, etc., without limitation. The display device provided by the present invention, through the housing and the display panel 1000 in an embodiment of the present invention, the display panel 1000 is installed in the housing, and the position and corresponding timing of the broken scanning line Gn are automatically confirmed, without the need to check the N scanning lines Gn one by one, thereby improving the repair efficiency and product yield.

[0040] Please refer to Figure 1 The present invention further provides a display panel 1000, comprising a plurality of pixels P and a driving circuit 100 in an embodiment of the present invention, wherein each scanning line Gn is respectively connected to at least one pixel P. The display panel 1000 may be a TFT-LCD panel; the display panel 1000 may also be other types of display panels such as an OLED display panel. Optionally, the display panel 1000 includes a display area A and a non-display area B, wherein the plurality of pixels P and some wires and components connected to the pixels P are all arranged in the display area A, and the remaining wires and components are all arranged in the non-display area B.

[0041] Optionally, the display panel 1000 includes an upper substrate and an array substrate, and the liquid crystal is arranged between the upper substrate and the array substrate. The pixel P includes a pixel electrode, and the pixel electrode and the driving circuit 100 in the embodiment of the present invention are both arranged on the array substrate. The driving circuit 100 changes the pixel voltage between the upper substrate and the array substrate by changing the output voltage to control the arrangement direction of the liquid crystal or the physical state of the liquid crystal. The light output by the external light source or the backlight source of the display panel 1000 forms polarized light through the polarization function of the liquid crystal, and is then projected onto the panel to produce a picture. Optionally, the array substrate includes a substrate, a driving circuit layer, a passivation layer and a pixel electrode layer stacked in sequence. The driving circuit 100 in the embodiment of the present invention is arranged in the driving circuit 100 layer, and the pixel electrode is arranged in the pixel electrode layer.

[0042] The display panel 1000 provided by the present invention adopts multiple pixels P and the driving circuit 100 in the embodiment of the present invention. Each scanning line Gn is connected to at least one pixel P, thereby automatically confirming the position and corresponding timing of the broken scanning line Gn. There is no need to check the N scanning lines Gn one by one, thereby improving the repair efficiency and product yield.

[0043] Please refer to Figure 1 The present invention also provides a driving circuit 100, including N scanning lines Gn, a detection module 20 and a compensation module 30, the detection module 20 includes a first detection line 21 and N first thin film transistors Q1, the drains of the N first thin film transistors Q1 are electrically connected to the first detection line 21, the sources and gates of the N first thin film transistors Q1 are electrically connected to the N scanning lines Gn in a one-to-one correspondence, the compensation module 30 is electrically connected to the detection module 20, wherein the first detection line 21 is used to output the first high level V1 of the N scanning lines Gn in sequence, and the compensation module 30 is used to output the first high level V1 to the broken scanning line Gn, wherein N is a positive integer.

[0044] The N scanning lines Gn are represented by horizontally arranged straight lines in the drawings of the specification of the present application, and the N scanning lines Gn are numbered Gn1, ..., Gn1 from top to bottom. M , …, Gn N , Gn M Gn1 to Gn N Similarly, the N first thin film transistors Q1 are labeled Q11, ..., Q11 from top to bottom in the drawings of the specification of the present application. M , …, Q1 N , Q1 M From Q11 to Q1 N Any one of .

[0045] Optionally, the driving circuit 100 further includes N driving units GOA, which are connected to the N scanning lines Gn in a one-to-one correspondence, and the driving unit GOA is used to output a first high level V1 to the corresponding scanning line Gn to turn on the pixel electrode on the scanning line Gn. Scan line Gn disconnection includes the scanning line Gn breaking and the driving unit GOA connected to the scanning line Gn being damaged. When any of these situations occurs, the scanning line Gn cannot output the first high level V1 to the pixel P. Among them, the N driving units GOA are labeled GOA1, ..., ... M , …, GOA N ,GOA M GOA1 to GOA N Any one of .

[0046] Optionally, the driving circuit 100 also includes multiple data lines 40. The N scan lines Gn of the driving circuit 100 in the embodiment of the present invention are arranged horizontally and spaced apart in the aforementioned display panel 1000, and the multiple data lines 40 are arranged vertically and spaced apart in the aforementioned display panel 1000. Multiple pixels P are arranged in an array in the display panel 1000 and are respectively connected to the corresponding scan lines Gn and data lines 40. When the display panel 1000 is displaying, each row of scan lines Gn is scanned row by row to turn on the pixels P connected to the row of scan lines Gn, and the corresponding data lines 40 charge different voltages to the turned-on pixels P to make the liquid crystals in the pixels P deflect at their respective angles, thereby realizing the display of the picture.

[0047] Optionally, the driving circuit 100 also includes a source driving board XB and a driving chip IC, the driving chip is electrically connected to the source driving board XB and multiple data lines 40, the source driving board XB is used to provide digital signals to the pixels P, and the driving chip IC is used to convert the digital signals from the source driving board XB into analog voltage signals and output them to multiple data lines 40 to charge the pixels P.

[0048] Optionally, the display panel 1000 further includes a flexible printed circuit board FPC and a processing chip SOC, and the detection module 20 and the compensation module 30 are both arranged in the processing chip SOC and connected to the pixel P through the flexible printed circuit board FPC.

[0049] Among them, the N scanning lines Gn sequentially output the first high level V1 from the corresponding driving unit GOA to the pixel electrode in one driving cycle T, and sequentially output it to the first detection line 21 through the N first thin film transistors Q1, so that when the display panel 1000 displays normally, the first detection line 21 always outputs the first high level V1 in one driving cycle T. When one of the scanning lines Gn is disconnected, the first detection line 21 cannot continuously output the first high level V1 in the corresponding timing, but outputs the fluctuating first signal V2 or no voltage output, so as to directly detect the disconnected scanning line Gn.

[0050] The detection module 20 includes a first detection line 21 and N first thin film transistors Q1, the drains of the N first thin film transistors Q1 are electrically connected to the first detection line 21, the sources and gates of the N first thin film transistors Q1 are electrically connected to the N scanning lines Gn one by one, the first detection line 21 is used to output the first high level V1 of the N scanning lines Gn in sequence, when the scanning line Gn is broken, the broken scanning line Gn and the corresponding timing of the broken scanning line Gn can be confirmed according to the signal change output by the first detection line 21, and the compensation module 30 is set to be electrically connected to the detection module 20 at the same time, the compensation module 30 is used to connect to the broken scanning line Gn and output the first high level V1 to it, so that the position of the broken scanning line Gn and the corresponding timing are automatically confirmed, and there is no need to check the N scanning lines Gn one by one, thereby improving the repair efficiency and product yield.

[0051] Please refer to Figure 1 , the detection module 20 also includes a first processor 22, and the first detection line 21 and the compensation module 30 are both electrically connected to the first processor 22. Optionally, the first processor 22 can be a programmable microcomputer, a programmable memory, a non-programmable storage, etc., without limitation. Specifically, the first processor 22 is used to receive the analog voltage signal output by the first detection line 21 and feed it back to the maintenance personnel. When the first processor 22 detects that a scanning line Gn corresponding to a certain timing within a driving cycle T is disconnected, the first processor 22 feeds back the result to the maintenance personnel. After the maintenance personnel connects the compensation module 30 to the disconnected scanning line Gn, the first processor 22 controls the compensation module 30 to output the first high level V1 to the corresponding scanning line Gn at the timing so that the disconnected scanning line Gn can still output the first high level V1 to the pixel P.

[0052] By setting up the first processor 22, the first detection line 21 and the compensation module 30 are electrically connected to the first processor 22, so that after the first processor 22 receives the analog voltage signal output by the first detection line 21, it can directly feed back to the maintenance personnel so that the maintenance personnel can repair the broken scanning line Gn. The first processor 22 can also control the compensation module 30 to output the first high level V1 to the broken scanning line Gn at a specific timing to make the broken scanning line Gn work normally again, thereby improving the speed of detection and repair.

[0053] Please refer to Figure 1 The driving circuit 100 also includes a threshold power supply VSS1, and the detection module 20 also includes a first comparator C1, a negative input terminal of the first comparator C1 is electrically connected to the threshold power supply VSS1, a positive input terminal of the first comparator C1 is electrically connected to the first detection line 21, and an output terminal of the first comparator C1 is electrically connected to the first processor 22.

[0054] Among them, since the voltage of the first high level V1 output by the scanning line Gn is relatively large, specifically 27V, and the first processor 22 can only receive and process a voltage with a lower voltage, specifically 2.3V, in order to prevent the first processor 22 from being damaged, a first comparator C1 is set to convert the first high level V1 output by the first detection line 21 into a voltage with a lower voltage value.

[0055] Optionally, the first comparator C1 is also connected to a power line VSS2 and a ground line GND. The power line VSS2 is used to provide a stable operating voltage for the first comparator C1 to ensure that the first comparator C1 can correctly perform logical operations and comparison functions. The ground line GND is used to provide a stable reference potential for the first comparator C1 to ensure that voltage measurement and current flow in the first comparator C1 are performed relative to this common reference point.

[0056] Exemplarily, the voltage output by the threshold power supply VSS1 is 27V, the first high level V1 is 27V, and when the scan line Gn is not broken, the first detection line 21 outputs the first high level V1 to the first comparator C1, and the first comparator C1 outputs a high level to the first processor 22. When the scan line Gn is broken, the first detection line 21 outputs a first signal V2 with a voltage value less than 27V to the first comparator C1 in the corresponding timing, and the first comparator C1 outputs a low level to the first processor 22, so that the first processor 22 detects the broken scan line Gn.

[0057] By setting the driving circuit 100 to also include a threshold power supply VSS1, the detection module 20 also includes a first comparator C1, the negative input terminal of the first comparator C1 is electrically connected to the threshold power supply VSS1, the positive input terminal of the first comparator C1 is electrically connected to the first detection line 21, and the output terminal of the first comparator C1 is electrically connected to the first processor 22, so that the first processor 22 will not be damaged by a voltage with a large voltage value, thereby ensuring the stability and safety of the driving circuit 100.

[0058] Please refer to Figure 1 The compensation module 30 includes a first compensation line 31 and a second processor 32. The second processor 32 is electrically connected to the first compensation line 31 and the first processor 22. The first compensation line 31 is used to connect to the broken scan line Gn. The second processor 32 is used to output a first high level V1 to the first compensation line 31.

[0059] Optionally, in the array substrate, the first compensation line 31 is spaced apart from the N scan lines Gn. When the display panel 1000 displays normally, the first compensation line 31 is insulated from the N scan lines Gn. When the first processor 22 detects that the scan line Gn is disconnected, the maintenance personnel connects the first compensation line 31 to the disconnected scan line Gn, and the first processor 22 controls the second processor 32 to output the first high level V1 to the disconnected scan line Gn at a corresponding timing so that the disconnected scan line Gn can still output the first high level V1 to the pixel P. Optionally, the structure of the second processor 32 is similar to that of the first processor 22, and reference can be made thereto without further description.

[0060] Optionally, the first compensation line 31 and the broken scanning line Gn can be connected by opening a through hole in the insulating layer between the first compensation line 31 and the broken scanning line Gn, or by adding a lead to connect the first compensation line 31 and the broken scanning line Gn, or by welding to hot-melt the first compensation line 31 and the broken scanning line Gn, without limitation.

[0061] By setting the compensation module 30 to include a first compensation line 31 and a second processor 32, the second processor 32 is connected to the first compensation line 31 and the first processor 22, the first compensation line 31 is used to connect to the broken scanning line Gn, and the second processor 32 is used to output the first high level V1 to the first compensation line 31, so that after the detection module 20 detects the broken scanning line Gn, it only needs to connect the first detection line 21 with the broken scanning line Gn, and then compensate the broken scanning line Gn with the first high level V1 through the second processor 32 to complete the repair of the scanning line Gn, without replacing the entire scanning line Gn and adding an external power supply, thereby reducing the difficulty of repair.

[0062] Please refer to Figure 1 , Figure 3 , Figure 4 and Figure 6 , the N scanning lines Gn each include a first end 11 and a second end 12, the N first ends 11 are electrically connected to the source and drain of the N first thin film transistors Q1 in one-to-one correspondence, the first compensation line 31 is used to connect to the first end 11 of the broken line, the detection module 20 also includes a second detection line 23, N second thin film transistors Q2 and a third processor 24, the second detection line 23 is connected to the third processor 24, the drains of the N second thin film transistors Q2 are all electrically connected to the second detection line 23, the N second ends 12 are electrically connected to the source and drain of the N second thin film transistors Q2 in one-to-one correspondence, the compensation module 30 also includes a fourth processor 34 and a second compensation line 33, the fourth processor 34 connects the second compensation line 33 and the third processor 24, the second compensation line 33 is used to connect to the second end 12 of the broken line, and the fourth processor 34 is used to output a first high level V1 to the second compensation line 33. Among them, the N second thin film transistors Q2 are labeled Q21, ..., Q2 from top to bottom in the drawings of the specification of the present application. M , …, Q2 N , Q2 M For Q21 to Q2 N Any one of .

[0063] Specifically, each of the N first ends 11 and the N second ends 12 is connected to one of the aforementioned drive units GOA. When the display panel 1000 displays normally, the two drive units GOA connected to the same scan line Gn simultaneously output the first high level V1 to the scan line Gn to realize bidirectional driving of the scan line Gn, thereby improving the speed at which the scan line Gn turns on the pixel P.

[0064] Optionally, the structures of the second detection line 23, N second thin-film transistors Q2 and the third processor 24 are identical to the structures of the first detection line 21, N second thin-film transistors Q2 and the first processor 22, and the structures of the fourth processor 34 and the second compensation line 33 are identical to the structures of the second processor 32 and the first compensation line 31.

[0065] The first detection line 21, the N second thin film transistors Q2 and the first processor 22 are used to detect whether the N first terminals 11 are disconnected, and the second processor 32 and the first compensation line 31 are used to output the first high level V1 to the disconnected first terminals 11. The second detection line 23, the N second thin film transistors Q2 and the third processor 24 are used to detect whether the N second terminals 12 are disconnected, and the fourth processor 34 and the second compensation line 33 are used to output the first high level V1 to the disconnected second terminals 12.

[0066] Optionally, the detection module 20 further includes a second comparator C2, the second comparator C2 is connected to the second detection line 23 and the third processor 24, and the second comparator C2 is connected to the aforementioned threshold power supply VSS1, the power line VSS2 and the ground line GND. The structure of the second comparator C2 is similar to that of the first comparator C1, and can be referred to without further description.

[0067] In one case, please refer to Figure 3 When only the first end 11 is disconnected, since the second end 12 still outputs the first high level V1 to the pixel P, and since the scanning line Gn has a resistor, voltage loss will occur during the process of the first high level V1 flowing from the second end 12 to the first end 11, the display panel 1000 shows that the brightness gradually decreases from the side with the second end 12 to the side with the first end 11. At this time, it is only necessary to connect the first compensation line 31 to the disconnected first end 11.

[0068] Since the N scan lines Gn are connected through a pull-down module (not shown), and only the first end 11 of the scan line Gn is disconnected, all scan lines Gn except the disconnected scan line Gn can normally output the first high level V1. Figure 4 The display effect of the display panel 1000 when only the second end 12 is disconnected is similar to the display effect of the display panel 1000 when only the first end 11 is disconnected, which can be referred to and will not be described in detail.

[0069] In other cases, please refer to Figure 6 When both the first end 11 and the second end 12 are disconnected, the scan line Gn does not output a high level for turning on the pixel P at all, and the scan lines Gn after the disconnected scan line Gn also do not output a high level for turning on the pixel P at all. At this time, it is necessary to connect the disconnected first end 11 to the first compensation line 31, and connect the disconnected second end 12 to the second compensation line 33.

[0070] By setting N scanning lines Gn to include a first end 11 and a second end 12, the N first ends 11 are electrically connected to the source and drain of the N first thin film transistors Q1 in one-to-one correspondence, the first compensation line 31 is used to connect to the first end 11 of the broken line, the detection module 20 also includes a second detection line 23, N second thin film transistors Q2 and a third processor 24, the second detection line 23 is connected to the third processor 24, the drains of the N second thin film transistors Q2 are electrically connected to the second detection line 23, the N second ends 12 are electrically connected to the drains of the N second thin film transistors Q2 The source and the drain are electrically connected in one-to-one correspondence. The compensation module 30 also includes a fourth processor 34 and a second compensation line 33. The fourth processor 34 connects the second compensation line 33 and the third processor 24. The second compensation line 33 is used to connect to the second end 12 of the broken line. The fourth processor 34 is used to output a first high level V1 to the second compensation line 33, so that when the display panel 1000 using the bidirectional driving mode of the scan line Gn has a broken line on one side or both sides, it is possible to directly detect the broken line position and corresponding timing of the scan line Gn and repair it.

[0071] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 The present invention further provides a repair method for a driving circuit, which is applied to the driving circuit 100 in an embodiment of the present invention, and comprises:

[0072] A driving cycle T of the driving circuit 100 sequentially passes through the 1st time period t1, ..., the Mth time period tM... and the Nth time period tN. When the first detection line 21 does not recognize that the Mth scan line Gn outputs the first high level V1 in the Mth time period tM, the compensation module 30 and the Mth scan line Gn are connected. The compensation module 30 outputs the first high level V1 to the Mth scan line Gn in the Mth time period tM, so that the Mth scan line Gn outputs the first high level V1 in the Mth time period tM.

[0073] Among them, when the display panel 1000 displays normally, the N scan lines Gn sequentially output the first high level V1 in the 1st time period t1, ..., the Mth time period tM... and the Nth time period tN to turn on the corresponding pixels P, and the corresponding data lines 40 charge different voltages to the turned-on pixels P to deflect the liquid crystal in the pixels P at their respective angles, thereby realizing the display of the picture.

[0074] When the Mth scan line Gn is broken, the first high level V1 cannot be output in the Mth time period tM, but the output voltage is a high level lower than the first high level V1 or the high level used to turn on the pixel P is not output, resulting in the first detection line 21 being unable to continuously output the first high level V1, but outputting a fluctuating and unstable first signal V2 or a voltage value of 0, and the peak voltage of the first signal V2 is lower than the first high level V1.

[0075] The first detection line 21 then outputs the first signal V2 to the first comparator C1. The first comparator C1 compares the first signal V2 with the voltage of the threshold power supply VSS1 and outputs a signal indicating that the Mth scan line Gn is broken to the first processor 22. The maintenance personnel connect the compensation module 30 and the Mth scan line Gn according to the signal. In the Mth time period tM, the compensation module 30 outputs the first high level V1 to the Mth scan line Gn, so that the Mth scan line Gn outputs the first high level V1.

[0076] By using the repair method for the driving circuit provided by the present invention, when the first detection line 21 fails to recognize that the Mth scanning line Gn outputs the first high level V1 in the Mth time period tM, the compensation module 30 and the Mth scanning line Gn are connected, and the compensation module 30 outputs the first high level V1 to the Mth scanning line Gn in the Mth time period tM, so that the Mth scanning line Gn outputs the first high level V1 in the Mth time period tM, thereby automatically confirming the position and corresponding timing of the broken scanning line Gn, without having to check the N scanning lines Gn one by one, thereby improving the repair efficiency and product yield.

[0077] Please refer to Figure 3 and Figure 4 The repair method of the driving circuit provided by the present invention also includes: when the first detection line 21 does not recognize that the Mth first end 11 outputs the first high level V1 in the Mth time period tM, connecting the first compensation line 31 and the Mth first end 11, and the first compensation line 31 outputs the first high level V1 to the Mth first end 11 in the Mth time period tM, so that the Mth first end 11 outputs the first high level V1 in the Mth time period tM.

[0078] Specifically, in the Mth period tM, the Mth first terminal 11 cannot output the first high level V1 to the gate and source of the Mth first thin film transistor Q1, but outputs the first signal V2 to the first detection line 21 through the Mth first thin film transistor Q1, and the first signal V2 is output to the first processor 22 through the first comparator C1. After the first compensation line 31 is connected to the Mth first terminal 11, in the Mth period tM, the first processor 22 outputs the second signal to the second processor 32, and the second processor 32 outputs the first high level V1 to the Mth first terminal 11 through the first compensation line 31, so that the Mth first terminal 11 outputs the first high level V1.

[0079] By the repair method of the driving circuit provided by the present invention, when the first detection line 21 fails to identify that the Mth first end 11 outputs the first high level V1 in the Mth time period tM, the first compensation line 31 is connected to the Mth first end 11, and the first compensation line 31 outputs the first high level V1 to the Mth first end 11 in the Mth time period tM, so that the Mth first end 11 outputs the first high level V1 in the Mth time period tM, so that when the Mth first end 11 is disconnected, the detection module 20 can feedback the disconnection of the Mth first end 11 to the maintenance personnel, and after the first compensation line 31 is connected to the Mth first end 11, the first detection line 21 outputs the first high level V1 to the Mth first end 11, so that the Mth first end 11 outputs the first high level V1, thereby realizing automatic confirmation of the position of the disconnected first end 11 and the corresponding timing, without the need to check the N scan lines Gn one by one, thereby improving the repair efficiency and product yield.

[0080] Please refer to Figures 1 to 7 The repair method of the driving circuit provided by the present invention also includes: when the second detection line 23 does not recognize that the Mth second end 12 outputs the first high level V1 in the Mth time period tM, connecting the second compensation line 33 and the Mth second end 12, and the second compensation line 33 outputs the first high level V1 to the Mth second end 12 in the Mth time period tM, so that the Mth second end 12 outputs the first high level V1 in the Mth time period tM.

[0081] Specifically, in the Mth time period tM, the Mth second terminal 12 outputs the first signal V2 to the gate and source of the Mth second thin film transistor Q2, the second detection line 23 outputs the first signal V2 to the third processor 24 through the second comparator C2, and connects the second compensation line 33 with the Mth second terminal 12. In the Mth time period tM, the third processor 24 outputs the second signal to the fourth processor 34, and the fourth processor 34 outputs the first high level V1 to the Mth second terminal 12 through the second compensation line 33, so that the Mth second terminal 12 outputs the first high level V1.

[0082] In one case, please refer to Figures 3 to 5 , only the Mth first end 11 or the Mth second end 12 is broken, when M<N, at this time, the M+1th scanning line Gn to the Nth scanning line Gn can all work normally without repair, and only one end of the broken line needs to be compensated and repaired.

[0083] In other cases, please refer to Figure 6 and Figure 7, the Mth first end 11 and the Mth second end 12 are both disconnected, when M<N, at this time, the M+1th scanning line Gn to the Nth scanning line Gn cannot output the first high level V1 in the corresponding period, and it is necessary to compensate and repair the Mth first end 11 and the Mth second end 12. If after the Mth scanning line Gn is repaired, when M<N, there is still a scanning line Gn disconnected in the M+1th scanning line Gn to the Nth scanning line Gn, then repeat the above repair process until all scanning lines Gn can output the first high level V1, if after the Mth scanning line Gn is repaired, when M<N, the M+1th scanning line Gn to the Nth scanning line Gn can normally output the first high level V1, then the repair is completed.

[0084] By using the repair method for the driving circuit provided by the present invention, when the second detection line 23 does not recognize that the Mth second end 12 outputs the first high level V1 in the Mth time period tM, the second compensation line 33 is connected to the Mth second end 12, and the second compensation line 33 outputs the first high level V1 to the Mth second end 12 in the Mth time period tM, so that the Mth second end 12 outputs the first high level V1 in the Mth time period tM, thereby automatically confirming the position of the broken second end 12 and the corresponding timing, without having to check the N scan lines Gn one by one, thereby improving the repair efficiency and product yield.

[0085] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0086] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A driving circuit, characterized in that: include: N scan lines, each comprising a first end and a second end, each of the first end and each of the second end is connected to a driving unit, and the driving unit is used to output a first high level to the scan line; A detection module, comprising a first detection line, N first thin film transistors, a first processor, a second detection line, N second thin film transistors and a third processor, wherein drains of the N first thin film transistors are directly electrically connected to the first detection line, the N first terminals are electrically connected to sources and gates of the N first thin film transistors in a one-to-one correspondence, and the first detection line is electrically connected to the first processor; The drains of the N second thin film transistors are all directly electrically connected to the second detection line, the N second terminals are electrically connected to the sources and gates of the N second thin film transistors in a one-to-one correspondence, and the second detection line is connected to the third processor; A compensation module, comprising a second processor, a fourth processor, a first compensation line and a second compensation line, wherein the second processor is connected to the first compensation line and the first processor, the second processor is used to output the first high level to the first compensation line, the first compensation line is used to be connected to the first end of the broken line, the fourth processor is connected to the second compensation line and the third processor, the fourth processor is used to output the first high level to the second compensation line, and the second compensation line is used to be connected to the second end of the broken line; Among them, the first detection line is used to sequentially output the first high level of N first ends, the second detection line is used to sequentially output the first high level of N second ends, the first compensation line is used to output the first high level to the first end of the broken line, and the second compensation line is used to output the first high level to the second end of the broken line, wherein N is a positive integer.

2. The driving circuit according to claim 1, characterized in that: The driving circuit also includes a threshold power supply, and the detection module also includes a first comparator, the negative input terminal of the first comparator is electrically connected to the threshold power supply, the positive input terminal of the first comparator is electrically connected to the first detection line, and the output terminal of the first comparator is electrically connected to the first processor.

3. A display panel, characterized in that: The device comprises a plurality of pixels and a driving circuit as claimed in claim 1 or 2, wherein each of the scanning lines is respectively connected to at least one of the pixels.

4. A display device, characterized in that: The invention comprises a housing and the display panel as claimed in claim 3, wherein the display panel is installed in the housing.

5. A method for repairing a driving circuit, characterized in that: The driving circuit as claimed in claim 1 or 2 comprises: A driving cycle of the driving circuit sequentially passes through the 1st time period, ..., the Mth time period, ... and the Nth time period, wherein M is a positive integer less than or equal to N; When the first detection line does not recognize that the Mth scan line outputs the first high level in the Mth time period, the compensation module and the Mth scan line are connected, and the compensation module outputs the first high level to the Mth scan line in the Mth time period, so that the Mth scan line outputs the first high level in the Mth time period.

6. The method for repairing a driving circuit according to claim 5, characterized in that: include: When the first detection line does not recognize that the Mth first end outputs the first high level in the Mth time period, the first compensation line is connected to the Mth first end, and the first compensation line outputs the first high level to the Mth first end in the Mth time period, so that the Mth first end outputs the first high level in the Mth time period.

7. The method for repairing a driving circuit according to claim 6, characterized in that: include: When the second detection line does not recognize that the Mth second end outputs the first high level in the Mth time period, the second compensation line is connected to the Mth second end, and the second compensation line outputs the first high level to the Mth second end in the Mth time period, so that the Mth second end outputs the first high level in the Mth time period.

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