Driving circuit, driving method and display panel

Abstract

The embodiment of the invention discloses a driving circuit, a driving method and a display panel, and belongs to the technical field of display. The driving circuit comprises a detection module which is electrically connected with a plurality of scanning lines and is used for determining the position of an abnormal scanning line in the plurality of scanning lines according to output signals of the plurality of scanning lines and a preset reference signal; and the compensation module is electrically connected with the detection module and the plurality of scanning lines respectively, and the compensation module is used for outputting a compensation signal to the row where the abnormal scanning line is located according to the opening sequence of the plurality of scanning lines and the position of the abnormal scanning line. According to the embodiment of the invention, the position of the abnormal scanning line in the plurality of scanning lines is determined through the detection module, and then the compensation signal is output to the row where the abnormal scanning line is located through the compensation module, so that the row where the scanning line is located can be normally driven; and therefore, the technical problem of poor effect caused by operation errors when the scanning lines are repaired through manual operation can be avoided.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technologies, and particularly to a driving circuit, a driving method, and a display panel. Background Art

[0002] Currently, in the production process of a display panel, a situation where a scan line (Gate line) is broken may occur. In order to repair the broken lines that may appear at different positions, in related technologies, it is generally necessary to first locate the broken lines through a microscope, and then laser the broken row of scan lines together with a repair line through laser, so as to establish a repair path. However, this repair method relies too much on manual operation, which is not only time-consuming, but also once an operation error occurs, the repair effect will be poor. Summary of the Invention

[0003] The main purpose of the embodiments of the present application is to provide a driving circuit, a driving method, and a display panel, aiming to solve the technical problem of how to avoid the poor effect caused by operation errors when repairing scan lines through manual operation.

[0004] To achieve the above object, an embodiment of the present application provides a driving circuit, which includes:

[0005] A detection module, the detection module is electrically connected to a plurality of scan lines, and the detection module is used to determine the position of an abnormal scan line among the plurality of scan lines according to the output signals of the plurality of scan lines and a preset reference signal;

[0006] A compensation module, the compensation module is electrically connected to the detection module and the plurality of scan lines respectively, and the compensation module is used to output a compensation signal to the row where the abnormal scan line is located according to the turn-on sequence of the plurality of scan lines and the position of the abnormal scan line.

[0007] In an embodiment, the preset reference signal includes a preset comparison signal and a column clock signal output by a timing controller;

[0008] The detection module includes:

[0009] A comparison unit, the comparison unit is electrically connected to the plurality of scan lines and accesses the preset comparison signal, and the comparison unit is used to compare the output signals of the plurality of scan lines with the preset comparison signal to obtain a comparison result;

[0010] A logic processing unit, the logic processing unit is electrically connected to the comparison unit, the timing controller, and the compensation module respectively, and the logic processing unit is used to determine the position of an abnormal scan line among the plurality of scan lines according to the comparison result and the column clock signal, and output the position of the abnormal scan line to the compensation module.

[0011] In one embodiment, the multiple scan lines are driven by a plurality of differential clock signals generated by a level converter based on the column clock signal. The detection module includes a plurality of the comparison units, and the number of the comparison units is the same as the number of the differential clock signals.

[0012] In one embodiment, the logic processing unit includes:

[0013] An OR gate electrically connected to a plurality of the comparison units, and the OR gate is configured to output a control signal based on the plurality of comparison results;

[0014] A processor electrically connected to the OR gate, the timing controller, and the compensation module respectively. The processor is configured to compare the control signal with the column clock signal to determine a driving timing, determine the position of an abnormal scan line among the multiple scan lines according to the driving timing, and output the position of the abnormal scan line to the compensation module.

[0015] In one embodiment, the compensation module includes:

[0016] A compensation line electrically connected to the detection module, and the compensation line is configured to transmit the compensation signal;

[0017] A switch unit electrically connected to the compensation line, the detection module, and the multiple scan lines respectively. The switch unit is configured to control the on / off of the compensation line according to the turn-on sequence of the multiple scan lines and the position of the abnormal scan line, so that the compensation signal is output to the row where the abnormal scan line is located.

[0018] In addition, to achieve the above object, an embodiment of the present application further provides a driving method, which is applied to the driving circuit as described above and includes:

[0019] Determine the position of an abnormal scan line among the multiple scan lines according to the output signals of the multiple scan lines and a preset reference signal;

[0020] Output a compensation signal to the row where the abnormal scan line is located according to the turn-on sequence of the multiple scan lines and the position of the abnormal scan line.

[0021] In one embodiment, the preset reference signal includes a preset comparison signal and a column clock signal output by a timing controller;

[0022] The step of determining the position of an abnormal scan line among the multiple scan lines according to the output signals of the multiple scan lines and the preset reference signal includes:

[0023] Compare the output signals of the multiple scan lines with the preset comparison signal to obtain comparison results;

[0024] Determine the positions of abnormal scan lines among the multiple scan lines according to the comparison result and the column clock signal.

[0025] In one embodiment, the step of determining the positions of abnormal scan lines among the multiple scan lines according to the comparison result and the column clock signal includes:

[0026] Output a control signal based on the multiple comparison results;

[0027] Compare the control signal with the column clock signal to determine the driving timing;

[0028] Determine the positions of abnormal scan lines among the multiple scan lines according to the driving timing.

[0029] In one embodiment, the driving circuit includes a compensation line;

[0030] The step of outputting a compensation signal to the row where the abnormal scan line is located according to the turning-on sequence of the multiple scan lines and the position of the abnormal scan line includes:

[0031] Control the on / off of the compensation line according to the turning-on sequence of the multiple scan lines and the position of the abnormal scan line, so that the compensation signal is output to the row where the abnormal scan line is located.

[0032] In addition, to achieve the above object, an embodiment of the present application further provides a display panel, which includes: multiple scan lines extending along a first direction and multiple data lines extending along a second direction. The multiple scan lines and the multiple data lines are insulated and cross-defined to form multiple sub-pixel regions. The display panel further includes: the driving circuit as described above, and the driving circuit is electrically connected to the multiple scan lines.

[0033] An embodiment of the present application provides a driving circuit, a driving method, and a display panel. The driving circuit includes: a detection module, the detection module is electrically connected to multiple scan lines, and the detection module is used to determine the positions of abnormal scan lines among the multiple scan lines according to the output signals of the multiple scan lines and a preset reference signal; a compensation module, the compensation module is electrically connected to the detection module and the multiple scan lines respectively, and the compensation module is used to output a compensation signal to the row where the abnormal scan line is located according to the turning-on sequence of the multiple scan lines and the position of the abnormal scan line. In the embodiment of the present application, the detection module receives the output signals from each scan line, and based on the comparison between the preset reference signal and the output signal, the positions of abnormal scan lines among the multiple scan lines can be determined. Then, the compensation module outputs a compensation signal to the row where the abnormal scan line is located, so that the row where the scan line is located can be normally driven, thereby avoiding the technical problem that the effect is not good due to operation errors when repairing the scan line manually. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only a part of the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0035] Figure 1 Structural schematic diagram of a driving circuit provided by an embodiment of the present application;

[0036] Figure 2 Schematic diagram of an application scenario related to a driving circuit provided by an embodiment of the present application;

[0037] Figure 3 Schematic diagram of a signal output waveform related to a scan line in a driving circuit provided by an embodiment of the present application;

[0038] Figure 4 Schematic diagram of a waveform of a differential clock signal output by a level converter in actual application in a driving circuit provided by an embodiment of the present application;

[0039] Figure 5 Structural schematic diagram of a detection module in a driving circuit provided by an embodiment of the present application;

[0040] Figure 6 Schematic diagram of a comparison principle related to a detection module in a driving circuit provided by an embodiment of the present application;

[0041] Figure 7 Structural schematic diagram of a logic processing unit in a driving circuit provided by an embodiment of the present application;

[0042] Figure 8 Schematic diagram of a counting waveform related to a logic processing unit in a driving circuit provided by an embodiment of the present application;

[0043] Figure 9 Structural schematic diagram of a compensation module in a driving circuit provided by an embodiment of the present application;

[0044] Figure 10 Flow schematic diagram of a driving method provided by an embodiment of the present application.

[0045] Explanation of the reference numerals in the drawings:

[0046] 10. Detection module; 20. Compensation module; 11. Comparison unit; 12. Logic processing unit; 121. OR gate; 122. Processor; 21. Compensation line; 22. Switch unit. Detailed implementation manners

[0047] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the embodiments of the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the embodiments of the present application.

[0048] As a flat panel display device, TFT-LCD (Thin Film Transistor Liquid Crystal Display) is increasingly used in the field of high-performance displays because of its characteristics such as small size, low power consumption, no radiation, and relatively low manufacturing cost. When a TFT-LCD is displaying, the gate lines of each row on the display panel are scanned row by row to turn on the pixel units connected to the gate lines of that row, and the data lines output data signals to the turned-on pixel units to charge the pixel units. Pixel units charged with different amounts of electricity correspond to different deflection angles of the liquid crystal, so that images with different gray levels can be displayed. In order to further reduce the production cost of liquid crystal display products, in related technologies, the circuit used to scan the gate lines often adopts GOA (Gate Driver on Array) design. By integrating the TFT gate switch circuit on the array substrate of the display panel to form a scanning drive for the display panel, this gate switch circuit integrated on the array substrate using GOA technology is also called a GOA unit or a shift register unit. The display device using GOA units can reduce the product cost in terms of both material cost and manufacturing process because it eliminates part of the bonding drive circuit.

[0049] Taking an LCD or OLED (Organic Light-Emitting Diode) display screen as an example, its pixel architecture generally scans and turns on in the horizontal direction and is driven and charged in the vertical direction by Source Line. Among them, the horizontal GOA (a simple row-by-row shift circuit, made on glass, with basically no cost increase during production) scanning drive is bidirectional, and the vertical direction is driven by a Source Driver chip. The Source Driver receives the display data transmitted from the front end and performs relatively complex data processing, then performs DAC digital-to-analog conversion to generate a gray scale voltage and sends it to the in-plane drive for display. The cost of the Source Driver chip is relatively high, and it is convenient for transmitting display data, so it is generally driven unidirectionally; while the GOA unit has a lower cost, so a dual-drive structure is generally adopted.

[0050] Since the gate routing is generally designed as dual-drive in the horizontal direction, that is, the scan lines on both sides are connected, but the existing production process may cause G line breakage or dark lines, so that only one side of the gate line is open. For small-sized, low-resolution panels, the line break may not be obvious, but products in related technologies, such as TVs with high resolution (such as 5K, 8K and other ultra-high-definition UHD) and high refresh rates (100, 120, 144, 165, 240Hz, etc.), have a short charging time. In addition, for large-size TVs such as 50, 55, 58, 65, 75 and even 94, 100, 107 inches, the scan line from one side is transmitted to the other section of the scan line, which will cause the sub-pixels on the side of the broken part to be insufficiently charged, that is, the target grayscale voltage level cannot be charged within the charging time, and there is an obvious boundary difference when displaying. Unfortunately, this type of product is expensive and has a high cost-effectiveness in repair, but the location of the broken wire is unknown to maintenance personnel, so it may appear in every area of ​​the panel, making it difficult to repair. For different locations, a universal circuit design needs to be found for repair.

[0051] The solution in the related technology is generally to first use a microscope to find which scan line of the panel is broken, and then use a laser to laser the broken scan line and the repair line together, so as to establish a repair path, and finally collect the gate drive signal from the other end (the other side of the dual drive without abnormality), and then send it back after passing through the OP (operational amplifier). However, this solution has many disadvantages. For example, each piece needs to be manually observed to see which scan line is broken, and then laser, and there may be poor connection during the laser process, resulting in poor repair effect. In addition, the OP required by this solution has a large withstand voltage difference, which is difficult to select. There will be a delay problem after collecting the gate drive signal and then sending it back, and if the gate drives on both sides of the dual drive are disconnected, it cannot be repaired; at the same time, for the repair of broken lines, each time a G broken line is repaired, a repair line needs to be pulled back. In this way, because the glass routing is limited, at most only 1 or 2 scan lines can be repaired, that is, the number of broken line repairs is limited.

[0052] Based on this, the embodiments of the present application provide a driving circuit, a driving method and a display panel. By receiving the output signal from each scanning line through the detection module and comparing the preset reference signal with the output signal, the position of the abnormal scanning line among multiple scanning lines can be determined without manual search through a microscope, saving time and reducing the possibility of operational errors. The compensation module outputs a compensation signal to the row where the abnormal scanning line is located so that the row where the scanning line is located can be driven normally. There is no need for laser, avoiding the problem that manual repair may result in poor repair effect, and there is no need to complete the broken line repair through a limited number of repair lines, thus overcoming the problem of limited number of broken line repairs.

[0053] The driving circuit, driving method, and display panel provided by the embodiments of the present application will be specifically described through the following embodiments. First, the driving circuit in the embodiments of the present application will be described.

[0054] The embodiments of the present application provide a driving circuit. Referring to Figure 1 , Figure 1 is a schematic structural diagram of a driving circuit provided by an embodiment of the present application. In this embodiment, the driving circuit includes:

[0055] A detection module 10, the detection module 10 is electrically connected to a plurality of scan lines, and the detection module 10 is configured to determine the position of an abnormal scan line among the plurality of scan lines according to the output signals of the plurality of scan lines and a preset reference signal;

[0056] A compensation module 20, the compensation module 20 is electrically connected to the detection module 10 and a plurality of scan lines respectively, and the compensation module 20 is configured to output a compensation signal to the row where the abnormal scan line is located according to the opening sequence of the plurality of scan lines and the position of the abnormal scan line.

[0057] In this embodiment, the driving circuit is used to automatically detect and repair the G open or G dark line problems in the display panel. The display panel may include a plurality of GOA circuits, and each GOA circuit may correspond to the output signal G(n) of a scan line. G(n) represents the output turn-on signal of the gate of this row. When the TFT unit in the GOA circuit is abnormal or the trace is broken, resulting in no output of G(n), the output of this row will be displayed abnormally, causing G dark line or G open line.

[0058] Based on the detection module 10 in this embodiment, the abnormal G(n) can be automatically found without manual operation of the microscope for positioning, and the abnormal position can be determined according to a preset algorithm, and then the abnormal position is provided to the compensation module 20. The compensation module 20 outputs a compensation signal to the row where the abnormal scan line is located to achieve the effect of automatic repair, and the number of scan lines that can be compensated is not limited.

[0059] As an example, referring to Figure 2 , the situation of G dark line or weak line targeted by this embodiment can be combined with Figure 2For understanding, Gn can be the position where the line is broken. Since the GOA unit is generally a dual-drive design, there are two Gn signals, Gn_L and Gn_R, on both sides of the glass on the scan line of the nth row, and the two signals are connected together through the scan line. If one side of the Gn signal, for example, the Gn_L signal is missing (there are many reasons for the missing, such as TFT abnormality, trace corrosion and fracture, etc.), and the Gn_R on the other side outputs normally, then this row shows a weak line with the brightness decreasing from right to left. Because there is an RC (resistor-capacitor) in the horizontal scan line of the display screen, and only one Gn_R drives the scan line of one row, the load is too large, and the closer to the signal end, the better the charging effect, and the worst charging effect is at the farthest end. If both the left and right Gn are broken, then the scan signal of this row will be completely absent. Because the unit signal of the GOA is in a cascading relationship, when the Gn signal disappears, starting from the nth row, the following GOA units cannot be opened. At this time, the nth row and the subsequent rows cannot be opened for normal charging. Therefore, for the GOA units on both sides, the paths connected to the detection module 10 and the compensation module 20 should be retained.

[0060] In some feasible embodiments, multiple scan lines are driven by multiple differential clock signals generated by a level shifter based on a column clock signal output by a timing controller.

[0061] In this embodiment, the output signal waveform of the scan line in the display panel and the related signal output waveform can be referred to Figure 3 For understanding. Among them, the waveform of CKV (Clock pulse vertical, column clock signal) output by the timing controller (Tcon) is a regular square wave. For the waveform CKV output by the Tcon, the level shifter (LS) samples the signal once at the rising edge and once at the falling edge, and then obtains the LS output waveform. As an example, taking 4 differential clock signals CLK as columns, the waveforms of CK1 to CK4 can be obtained. The waveform output by CK1 reaches the GOA unit on the glass through the PCB (Printed Circuit Board), and finally the waveform of G1 is obtained. Therefore, the output signals Gn of all the scan lines of the display panel are all driven and generated through CK1 to CK4, only at different times, the scan signals corresponding to different rows are output. From Figure 3 It can be seen that the regular square wave waveform is a theoretical waveform, or the waveform without connecting the panel. In practical applications, after connecting the panel GOA unit, there is a back-end load, and there will be a load when the waveforms of CK1 to CK4 and Gn correspond to the opening of the scan line, which causes the square wave waveform to deform, as shown in the actual G(n + 3) waveform in Figure 3 And for the output of the LS in practical applications, as shown in Figure 4As shown, a normal row has a load of one row, so when it is turned on, it has the effect of back-end load. The voltage cannot instantaneously reach the established voltage, and there is a climbing time required. For the rows where Gn is disconnected, it will be reflected in the CLK waveform output by LS. At this time, it is a standard square wave. Therefore, this difference can be used to detect the number of disconnected Gn rows.

[0062] In some feasible embodiments, the preset reference signal includes a preset comparison signal and a column clock signal output by a timing controller; referring to Figure 5 , the above detection module 10 may specifically include:

[0063] A comparison unit 11, which is electrically connected to multiple scan lines and accesses the preset comparison signal. The comparison unit 11 is used to compare the output signals of the multiple scan lines with the preset comparison signal to obtain a comparison result;

[0064] A logic processing unit 12, which is electrically connected to the comparison unit 11, the timing controller, and the compensation module 20 respectively. The logic processing unit 12 is used to determine the positions of abnormal scan lines among the multiple scan lines according to the comparison result and the column clock signal, and output the positions of the abnormal scan lines to the compensation module 20.

[0065] Based on the foregoing embodiments, it can be known that since the GOA unit is driven row by row by four CKs of LS and corresponds to each row of the scan lines one by one, only the abnormalities of these four CKs need to be detected to know which specific row has a problem.

[0066] In this embodiment, as an example, the comparison unit 11 may be a comparator. By comparing CK1 with a comparison waveform (preset comparison signal), the output waveform can be obtained. Therefore, the number of comparison units 11 may be the same as the number of differential clock signals. Taking the differential clock signals including CK1 to CK4 in the foregoing embodiments as an example, the comparison results output by the comparison unit 11 may include output 1 to output 4. As Figure 6 shown, the comparison waveform is a high level, and the duration is the time when the voltage climbs to half of the normal voltage when CK rises. Under normal circumstances, within the time t1, the voltage of CK can only climb to half of the normal voltage. At this time, the comparison waveform and CK are compared through the comparator, and the output level is 0. The comparator is only limited to working within the time t1 (the power supply voltage of the comparator can be controlled for time-division comparison). When the back-end G scan is disconnected, the CK waveform is abnormal, and a pulse high level is output.

[0067] In this embodiment, the comparison results output by multiple comparison units 11 are provided to the logic processing unit 12, and then the logic processing unit 12 performs comprehensive analysis based on each comparison result and the column clock signal from the timing controller, and the positions of the abnormal scan lines among the multiple scan lines can be determined.

[0068] Referring to Figure 7 , in some feasible embodiments, the logic processing unit 12 may specifically include:

[0069] An OR gate 121, the OR gate 121 is electrically connected to a plurality of comparison units 11, and the OR gate 121 is configured to output a control signal based on a plurality of comparison results;

[0070] A processor 122, the processor 122 is electrically connected to the OR gate 121, the timing controller, and the compensation module 20 respectively. The processor 122 is configured to compare the control signal with the column clock signal to determine the driving timing, determine the position of the abnormal scan line among a plurality of scan lines according to the driving timing, and output the position of the abnormal scan line to the compensation module 20.

[0071] In this embodiment, as an example, the four comparison results obtained by comparing the four comparison units 11 in the foregoing embodiment with the comparison waveforms based on CK1 to CK4 are output to an OR gate 121, and a control signal CPV can be generated. Then, the column clock signal CKV of the timing controller Tcon is given to the processor 122, and the counting waveform as shown in Figure 8 can be obtained. When CPV is at a low level, a square wave of CKV is counted once. When CPV is at a high level, the counting is marked at this time, and the processor 122 records the count value at this time, then the position of the scan line break can be obtained. When CPV is given out, that is, after scanning to the last row, the position of the scan line break and the number of broken lines in the panel can be known.

[0072] Referring to Figure 9 , in some feasible embodiments, the compensation module 20 may specifically include:

[0073] A compensation line 21, the compensation line 21 is electrically connected to the detection module 10, and the compensation line 21 is configured to transmit a compensation signal;

[0074] A switch unit 22, the switch unit 22 is electrically connected to the compensation line 21, the detection module 10, and a plurality of scan lines respectively. The switch unit 22 is configured to control the on / off of the compensation line 21 according to the opening sequence of the plurality of scan lines and the position of the abnormal scan line, so that the compensation signal is output to the row where the abnormal scan line is located.

[0075] In this embodiment, after the specific position of the abnormal scan line is detected, it is necessary to repair the corresponding position, so as to realize automatic detection and automatic compensation. After knowing the position of the abnormal scan line, a compensation waveform can be separately generated for the scan signal corresponding to the missing scan line, and given to the GOA unit to achieve the same effect as repairing the scan line.

[0076] As an example, as shown in Figure 9As shown, the compensation signal needs to pass through the switch unit 22 to reach the GOA unit. Figure 9 The switch unit 22 shown in Figure 9 (taking the MOS switch as an example, it can also be other switch devices with similar effects) can control 8 channels through a 2-bit signal. If there are multiple channels, the number of control bits can be increased. In this way, as long as the digital signal used to control the switch unit 22 is adjusted according to the position of the abnormal scan line, the specific scan line to be compensated can be selected. Combining the foregoing embodiments, it can be known that when a frame of scanning is completed, the processor 122 obtains the position of the broken line. At this time, the position of the broken line is converted into the number of bits, and the switch unit 22 can be controlled. When a certain row of scanning is interrupted, the compensation for that row is turned on, and the compensation signal is given to the corresponding broken line row. At the same time, only one compensation line is needed to achieve the effect of compensating multiple abnormalities. This is because the scan lines are turned on row by row, so the switch unit 22 can be controlled by adjusting the number of bits to select the corresponding broken line row. In this way, at different times, the same compensation line can be used to repair multiple broken scan lines.

[0077] The embodiment of the present application provides a driving circuit. By receiving the output signals from each scan line through the detection module and comparing them based on a preset reference signal and the output signals, the positions of the abnormal scan lines among multiple scan lines can be determined, eliminating the need for manual search through a microscope, saving time and reducing the possibility of operation errors; through the compensation module, a compensation signal is output to the row where the abnormal scan line is located, enabling the row where the scan line is located to be normally driven, eliminating the need for laser treatment, avoiding the problem that the repair effect may be poor caused by manual operation, and also eliminating the need to complete the repair of broken lines through a limited number of repair lines, overcoming the problem of limited number of broken line repairs; the embodiment of the present application can utilize the external network circuit of the display panel, reducing the time of manual operation and the error of operation, enabling real-time detection of broken lines and timely positioning of broken or dark lines.

[0078] In addition, the embodiment of the present application also provides a driving method, referring to Figure 10 , Figure 10 which is a schematic flowchart of a driving method provided by the embodiment of the present application. In this embodiment, the driving method is applied to the driving circuit provided in the above embodiment, including steps S10 to S20:

[0079] Step S10, determining the positions of the abnormal scan lines among multiple scan lines according to the output signals of the multiple scan lines and the preset reference signal;

[0080] Step S20, outputting a compensation signal to the row where the abnormal scan line is located according to the opening order of the multiple scan lines and the position of the abnormal scan line.

[0081] In some feasible embodiments, the above-mentioned preset reference signal includes a preset comparison signal and a column clock signal output by a timing controller; the above-mentioned step S10 may specifically include:

[0082] Step S11, comparing the output signals of multiple scan lines with the preset comparison signal to obtain a comparison result;

[0083] Step S12, determining the positions of abnormal scan lines among the multiple scan lines according to the comparison result and the column clock signal.

[0084] In some feasible embodiments, the above-mentioned step S12 may specifically include:

[0085] Step S121, outputting a control signal based on multiple comparison results;

[0086] Step S122, comparing the control signal with the column clock signal to determine the driving timing;

[0087] Step S123, determining the positions of abnormal scan lines among the multiple scan lines according to the driving timing.

[0088] In some feasible embodiments, the above-mentioned driving circuit includes a compensation line; the above-mentioned step S20 may specifically include:

[0089] Step S21, controlling the on / off of the compensation line according to the turning-on sequence of multiple scan lines and the positions of abnormal scan lines, so that a compensation signal is output to the row where the abnormal scan line is located.

[0090] The driving method provided in this embodiment and the driving circuit provided in the above embodiment belong to the same technical concept. The specific structure of the driving circuit can refer to the above embodiment. Since the driving method provided in this embodiment adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0091] In addition, an embodiment of the present application further provides a display panel, which includes: multiple scan lines extending along a first direction and multiple data lines extending along a second direction. The multiple scan lines and the multiple data lines are insulated and cross each other to define a plurality of sub-pixel regions. The display panel further includes the driving circuit provided in the above embodiment, and the driving circuit is electrically connected to the multiple scan lines.

[0092] As an example, the display panel in this embodiment may be a TN (Twisted Nematic) display panel, an IPS (In-Plane Switching) display panel, a VA (Vertical Alignment) display panel, an MVA (Multi-Domain Vertical Alignment) display panel. Of course, it may also be other types of display panels, such as an OLED display panel.

[0093] The display panel provided in this embodiment can be applied to a display device. The display device may be a display device including a driving circuit and a display panel, or a debugging device for detecting and compensating abnormal scan lines in the display panel. This embodiment does not limit this. Specifically, the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0094] The display panel proposed in this embodiment and the driving circuit proposed in the above embodiment belong to the same technical concept. Technical details not described in detail in this embodiment can be referred to in any of the above embodiments. Moreover, this embodiment at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0095] It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order from that in the flowchart. Terms such as "first" and "second" in the specification, claims and the above drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0096] It should also be understood that references to "one embodiment" or "some embodiments" etc. described in the specification of the embodiments of the present application mean that specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0097] It should be noted that the technical solutions of the various embodiments of the present application can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0098] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application under the application concept of the present application, or directly or indirectly applied in other related technical fields, shall similarly be included in the patent protection scope of the present application.

Claims

1. A driving circuit, characterized in that: The driving circuit comprises: A detection module, the detection module is electrically connected to the plurality of scan lines, and the detection module is used to determine the position of an abnormal scan line among the plurality of scan lines according to output signals of the plurality of scan lines and a preset reference signal; A compensation module is electrically connected to the detection module and the plurality of scan lines respectively, and is used for outputting a compensation signal to the row where the abnormal scan line is located according to the opening sequence of the plurality of scan lines and the position of the abnormal scan line.

2. The driving circuit according to claim 1, characterized in that: The preset reference signal includes a preset comparison signal and a column clock signal output by a timing controller; The detection module comprises: A comparison unit, the comparison unit is electrically connected to the plurality of scan lines and connected to the preset comparison signal, and the comparison unit is used to compare the output signals of the plurality of scan lines with the preset comparison signal to obtain a comparison result; A logic processing unit, wherein the logic processing unit is electrically connected to the comparison unit, the timing controller and the compensation module respectively, and the logic processing unit is used to determine the position of the abnormal scan line among the multiple scan lines according to the comparison result and the column clock signal, and output the position of the abnormal scan line to the compensation module.

3. The driving circuit according to claim 2, characterized in that: The plurality of scan lines are driven by a plurality of difference clock signals generated by the level converter based on the column clock signal, and the detection module comprises a plurality of comparison units, the number of which is the same as the number of the difference clock signals.

4. The driving circuit according to claim 3, characterized in that: The logic processing unit comprises: An OR gate, the OR gate being electrically connected to the plurality of comparison units, and the OR gate being used to output a control signal based on the plurality of comparison results; A processor, wherein the processor is electrically connected to the OR gate, the timing controller and the compensation module respectively, and the processor is used to compare the control signal with the column clock signal to determine the driving timing, determine the position of the abnormal scan line among the multiple scan lines according to the driving timing, and output the position of the abnormal scan line to the compensation module.

5. The driving circuit according to claim 1, characterized in that: The compensation module comprises: A compensation line, the compensation line is electrically connected to the detection module, and the compensation line is used to transmit the compensation signal; A switch unit, wherein the switch unit is electrically connected to the compensation line, the detection module and the plurality of scan lines respectively, and the switch unit is used to control the on-off of the compensation line according to the opening sequence of the plurality of scan lines and the position of the abnormal scan line, so that the compensation signal is output to the row where the abnormal scan line is located.

6. A driving method, characterized in that: The driving method is applied to the driving circuit according to any one of claims 1 to 5, comprising: Determining positions of abnormal scan lines among the plurality of scan lines according to output signals of the plurality of scan lines and a preset reference signal; A compensation signal is output to the row where the abnormal scan line is located according to the start-up sequence of the plurality of scan lines and the position of the abnormal scan line.

7. The driving method according to claim 6, characterized in that: The preset reference signal includes a preset comparison signal and a column clock signal output by a timing controller; The step of determining the position of an abnormal scan line among the plurality of scan lines according to the output signals of the plurality of scan lines and a preset reference signal comprises: Comparing the output signals of the plurality of scan lines with the preset comparison signal to obtain a comparison result; The position of an abnormal scan line among the plurality of scan lines is determined according to the comparison result and the column clock signal.

8. The driving method according to claim 7, characterized in that: The step of determining the position of the abnormal scan line among the plurality of scan lines according to the comparison result and the column clock signal comprises: outputting a control signal based on the plurality of comparison results; comparing the control signal with the column clock signal to determine a driving timing; The position of an abnormal scanning line among the plurality of scanning lines is determined according to the driving timing.

9. The driving method according to claim 6, characterized in that: The driving circuit includes a compensation line; The step of outputting a compensation signal to a row where the abnormal scan line is located according to the opening sequence of the plurality of scan lines and the position of the abnormal scan line comprises: The on-off of the compensation line is controlled according to the opening sequence of the plurality of scan lines and the position of the abnormal scan line, so that the compensation signal is output to the row where the abnormal scan line is located.

10. A display panel, comprising: A plurality of scan lines extending along a first direction and a plurality of data lines extending along a second direction, wherein the plurality of scan lines and the plurality of data lines are insulated and cross-defined to form a plurality of sub-pixel regions, wherein the display panel further comprises: a driving circuit as described in any one of claims 1 to 5, wherein the driving circuit is electrically connected to the plurality of scan lines.

Images