Display panel and display panel repair method

Abstract

The present application discloses a display panel and a display panel repair method, comprising a timing control circuit, a data driver circuit, and a repair circuit. A predetermined display area of the display panel includes at least one faulty data line, the faulty data line comprising a fault point, a first sub-fault line, and a second sub-fault line. The first sub-fault line and the second sub-fault line are disconnected from the fault point, and the first sub-fault line receives a data signal from the data driver circuit via a repair line. The repair circuit is electrically connected to the data driver circuit and the timing control circuit. The timing control circuit is configured to detect a coupling frequency between the data line and a common electrode in the predetermined display area and, based on the detected coupling frequency, control the repair circuit to adjust the received data signal to a predetermined value and transmit the signal to the first sub-fault line.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a method for repairing a display panel. Background Art

[0002] The display panel includes a pixel array consisting of multiple pixel units, as well as scan lines and data lines connected to the corresponding pixel units. The drive circuit includes a scan drive circuit and a data drive circuit. The scan drive circuit provides scan signals to the corresponding pixel units via the scan lines to select the pixel units in a certain row. The data drive circuit provides data signals to the corresponding pixel units via the data lines, so that the selected pixel units display according to the data signals, thereby enabling the display panel to display images.

[0003] However, during the display panel manufacturing process, data lines often experience breakpoints. Repair lines are then required to transmit data signals to the faulty data line. However, due to the coupling of the data lines to the common voltage, the pixel at the fault point exhibits brightness differences from adjacent pixels. Especially at high coupling frequencies, the brightness differences between adjacent pixels in the same row at the fault point can be significant, resulting in horizontal brightness differences. Therefore, eliminating these pixel brightness differences at the fault point under different coupling frequencies is an urgent issue. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present application proposes a display panel and a method for repairing the display panel that effectively solves the brightness difference of pixels on a faulty data line.

[0005] The present application provides a display panel, comprising a data driving circuit, a plurality of data lines arranged sequentially along a first direction and extending along a second direction, and a plurality of pixel units. The data driving circuit is configured to output a data signal and transmit it to the pixel units via the data lines to control the pixel units to display an image. A predetermined display area of the display panel includes at least one faulty data line, the faulty data line comprising a fault point, a first sub-fault line, and a second sub-fault line. The first sub-fault line and the second sub-fault line are disconnected from the fault point, and the first sub-fault line receives a data signal from the data driving circuit via a repair line. The display panel also includes a timing control circuit and a repair circuit, the repair circuit being electrically connected to the data driving circuit and the timing control circuit. The timing control circuit is configured to detect a coupling frequency between the data line and a common electrode in the predetermined display area and, based on the detected coupling frequency, control the repair circuit to adjust the received data signal to a predetermined value and transmit the signal to the first sub-fault line.

[0006] Optionally, the display panel also includes a signal output circuit, which is electrically connected to the timing control circuit and the repair circuit, and is used to output at least two control signals to the repair circuit under the control of the timing control circuit, and the repair circuit adjusts the received data signal to the preset value based on the control signal.

[0007] Optionally, the repair circuit includes an amplification module and an adjustment module, the amplification module is electrically connected to the data driving circuit and the adjustment module, the adjustment module is electrically connected to the signal output circuit and the repair line, the amplification module is used to receive the data signal from the data driving circuit and transmit it to the adjustment module after amplification, and the adjustment module is used to adjust the data signal under the control of the control signal output by the signal output circuit.

[0008] Optionally, the amplification module includes a first amplifier and a first filtering unit, the non-phase end of the first amplifier is electrically connected to the data driving circuit, the inverting end of the first amplifier is electrically connected to the first filtering unit, the output end of the first amplifier is electrically connected to the adjustment module, and the first filtering unit is also electrically connected to the ground end and the output end of the first amplifier. The first amplifier is used to amplify the data signal output by the data driving circuit and transmit it to the adjustment module.

[0009] Optionally, the adjustment module includes at least a first adjustment unit and a second adjustment unit, and the first adjustment unit and the second adjustment unit are connected in parallel between the output end of the first amplifier and the repair line; the first adjustment unit is also electrically connected to the signal output circuit, and is used to adjust the data signal according to the first control signal output by the signal output circuit, and the second adjustment unit is also electrically connected to the signal output circuit, and is used to adjust the data signal according to the second control signal output by the signal output circuit.

[0010] Optionally, the first adjustment unit includes a first switching tube and a first resistor, and the second adjustment unit includes a second switching tube and a second resistor. The control end of the first switching tube is electrically connected to the signal output circuit, the first conductive end of the first switching tube is electrically connected to the amplification module, the second end of the first switching tube is electrically connected to the first end of the first resistor, and the second end of the first resistor is electrically connected to the repair line. The first switching tube is used to be turned on under the control of the first control signal to control the first resistor to adjust the data signal; the control end of the second switching tube is electrically connected to the signal output circuit, the first conductive end of the second switching tube is electrically connected to the amplification module, the second end of the second switching tube is electrically connected to the first end of the second resistor, and the second end of the second resistor is electrically connected to the repair line. The second switching tube is used to be turned on under the control of the second control signal to control the second resistor to adjust the data signal, wherein the first resistor is smaller than the second resistor.

[0011] Optionally, the display panel also includes a feedback regulation circuit, which is electrically connected to the signal output circuit and the common electrode. The feedback regulation circuit is used to adjust the common voltage under the control of the signal output circuit to control the voltage difference between the common voltage and the data signal received by the first sub-fault line to be within a preset range.

[0012] Optionally, the feedback regulation circuit includes a second amplifier, a second filtering unit, a first regulation unit and a second regulation unit, the non-phase end of the second amplifier is electrically connected to the common electrode, the inverting end of the second amplifier is electrically connected to the common electrode feedback point, the output end of the second amplifier is electrically connected to the common electrode, the second filtering unit is electrically connected between the common electrode feedback point and the inverting end of the second amplifier, the first regulation unit is electrically connected to the signal output circuit and between the inverting end and the output end of the second amplifier, and the second regulation unit is electrically connected to the signal output circuit and between the inverting end and the output end of the second amplifier; the first regulation unit or the second regulation unit is used to cooperate with the second amplifier to adjust the common voltage under the control of the signal output circuit.

[0013] An embodiment of the present application also provides a method for repairing a display panel, which is applied to the aforementioned display panel, including: determining the coupling frequency between the data line and the common electrode in the preset display area; adjusting the data signal output to the first sub-fault line or adjusting the common voltage based on the detected coupling frequency to control the voltage difference between the common voltage and the data signal within a preset range.

[0014] Optionally, the number of pixel units in each row in the preset display area that receive data signals of the same polarity is detected, and the number of rows of pixel units that receive data signals of the same polarity greater than a first preset number is determined, where the first preset number is one-tenth of the total number of columns of pixel units in the preset display area; the row of pixel units that receive data signals of the first polarity greater than the first preset number is recorded as the first polarity, and the row of pixel units that receive data signals of the second polarity greater than the first preset number is recorded as the second polarity, and the number of pixel units with opposite polarities in each two adjacent rows is calculated.

[0015] Optionally, when the number of pixel units with opposite polarity in each two adjacent rows within the preset display area is within a first preset range, the coupling frequency characterizing the preset display area is a first frequency, and the first adjustment unit is controlled to adjust the data signal; when the number of pixel units with opposite polarity in each two adjacent rows within the preset display area is within a second preset range, the coupling frequency characterizing the preset display area is a second frequency, and the second adjustment unit is controlled to adjust the data signal, wherein the first frequency is less than the second frequency.

[0016] Compared with the existing technical problems, the embodiment of the present application detects the coupling frequency in the display area where the fault point is located, and adjusts the data signal transmitted to the faulty data line according to the coupling frequency control repair circuit, so that the data signal received by the faulty data line can be changed according to the coupling frequency of the preset display area, thereby reducing the influence of the coupling effect between the data line and the common electrode on the brightness of the pixel unit, thereby reducing the brightness difference between the pixel unit connected to the faulty data line and the adjacent pixel units. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of a display device provided in the first embodiment of the present application;

[0019] Figure 2 A schematic diagram of a planar layout of a display panel in the related art;

[0020] Figure 3 A schematic diagram of the layout of a first display panel provided in an embodiment of the present application;

[0021] Figure 4 A flowchart of an adjustment and repair method provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram showing the division of the display area;

[0023] Figure 6 A schematic diagram of the polarity of the data signal received by the pixel unit;

[0024] Figure 7 for Figure 3 Equivalent circuit diagram of the signal output circuit;

[0025] Figure 8 for Figure 3 Equivalent circuit diagram of the repair circuit;

[0026] Figure 9 for Figure 3 Equivalent circuit diagram of the feedback regulation circuit.

[0027] Reference numerals:

[0028] Display device 100, display panel 10, power module 20, support frame 30, display area 10a, non-display area 10b, data line S, scan line G, pixel unit P, timing control circuit 11, data drive circuit 12, scan drive circuit 13, repair circuit 14, repair line 15, signal output circuit 16, feedback adjustment circuit 17, first direction F1, second direction F2, faulty data line SF, first sub-fault line sf1, second sub-fault line sf2, fault point SC , first endpoint-A, second endpoint-B, first sub-region-101, second sub-region-102, third sub-region-103, fourth sub-region-104, first pixel unit-P1, second pixel unit-P2, third pixel unit-P3, fourth pixel unit-P4, fifth pixel unit-P5, sixth pixel unit-P6, seventh pixel unit-P7, eighth pixel unit-P8, ninth pixel unit-P9, tenth pixel unit-P10, first row pixel unit-A1, second row pixel unit-A2, third row pixel unit-A3, first pixel unit-P10 Four rows of pixel units-A4, first input terminal-161, second input terminal-162, first output terminal-163, second output terminal-164, third output terminal-165, fourth output terminal-166, amplification module-141, adjustment module-142, first amplifier-141a, first filtering unit-141b, first adjustment unit-142a, second adjustment unit-142b, third adjustment unit-142c, fourth adjustment unit-142d, first switch tube-T1, first resistor-R1, second switch tube-T2, second resistor -R2, third switching tube-T3, third resistor-R3, fourth switching tube-T4, fourth resistor-R4, first filter resistor-FR1, first filter capacitor-FC1, second amplifier-171, second filtering unit-172, first adjustment unit-173a, second adjustment unit-173b, common electrode-Vcom, common electrode feedback point-VF, second filter resistor-FR2, second filter capacitor-FC2, fifth switching tube-T5, fifth resistor-R5, sixth switching tube-T6, sixth resistor-R6, ground terminal-GND. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0030] The following descriptions of the embodiments are made with reference to the accompanying drawings to illustrate specific embodiments that may be implemented in accordance with the present application. The serial numbers assigned to the components herein, such as "first," "second," etc., are merely used to distinguish the objects being described and do not have any sequential or technical meaning. References to "connection" and "coupling" in this application include both direct and indirect connections (couplings) unless otherwise specified. Directional terms mentioned in this application, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," and "side," are merely referenced to the directions in the accompanying drawings. Therefore, the directional terms used are intended to better and more clearly illustrate and understand this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting this application.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of this application are used to distinguish different objects, rather than to describe a specific order.

[0032] In addition, the terms "include", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "include" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions. In addition, when describing the embodiments of the present application, "may" is used to indicate "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0034] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a display device provided in the first embodiment of the present application. Figure 1 As shown, the display device 100 includes a display panel 10, a power module 20, and a support frame 30. The display panel 10 and the power module 20 are fixed to the support frame 30. The power module 20 is disposed on the back side of the display panel 10, i.e., the non-display side of the display panel 10. The power module 20 is used to provide power voltage for the display panel 10 to display images, and the support frame 30 provides a secure and protective function for the display panel 10 and the power module 20. In other embodiments of the present application, the display device 100 may not be provided with a support frame 30, for example, in a portable electronic device such as a mobile phone or a tablet computer.

[0035] See also Figure 2 , Figure 2 Schematic diagram of the planar layout of a display panel in related art.

[0036] like Figure 2 As shown, the display panel 10 includes a display area 10a and a non-display area 10b that are adjacent to each other, wherein the display area is provided with a plurality of scan lines G extending along a first direction F1 and sequentially arranged along a second direction F2, a plurality of data lines S extending along the second direction F2 and sequentially arranged along the first direction F1, and a plurality of pixel units P arranged in an array, the pixel units P being configured to receive scan signals from the scan lines and receive data signals from the data lines S under the control of the scan signals to display images.

[0037] The non-display area 10b is provided with a timing control circuit 11, a data driving circuit 12 and a scanning driving circuit 13. The timing control circuit 11 receives an image signal representing image information, a horizontal synchronization signal and a vertical synchronization signal from an external signal source, and outputs a clock signal for controlling the scanning driving circuit 13, a scanning control signal, and a data control signal for controlling the data driving circuit 12.

[0038] The data driving circuit 12 is used to output data signals (Data) to the pixel units P in the display area 10a according to the data control signal. The scan driving circuit 13 receives the timing control circuit 11 and outputs scan signals to the pixel units P in the display area 10a according to the scan control signal.

[0039] During the manufacturing process of the display panel 10, data lines S often break. For example, multiple data lines S include a faulty data line SF, which includes a first endpoint A, a second endpoint B, and a fault point SC. Here, i is an integer greater than or equal to 1. The data line between the first endpoint A and the fault point SC is a first sub-faulty line sf1, and the data line between the second endpoint B and the fault point SC is a second sub-faulty line sf2. The second sub-faulty line sf2 is connected to the data driving circuit 12 via the second endpoint B. The first sub-faulty line sf1 is away from the data driving circuit 12 and electrically disconnected from the data driving circuit 12. Since the second sub-faulty line sf2 is connected to the data driving circuit 12, it can still receive data signals from the data driving circuit 12. However, since the first sub-faulty line sf1 is disconnected from the data driving circuit 12, it cannot receive data signals from the data driving circuit 12.

[0040] In the related art, the display panel 10 is usually also provided with a repair circuit 14 and a repair line 15. The repair circuit 14 is connected to the data driving circuit 12 and the repair line 15, and is connected to the first sub-fault line sf1 through the repair line 15 and the first terminal A. It is used to receive the data signal corresponding to the first sub-fault line sf1 from the data driving circuit 12, and adjust the data signal and transmit it to the first sub-fault line sf1 through the repair line 15, so as to transmit the corresponding data signal to the first sub-fault line sf1, that is, to realize the repair of the faulty data line SF.

[0041] However, when the data driving circuit 12 outputs a data signal to the normal data line S, it is transmitted from the second terminal B to the first terminal A, while the first sub-fault line sf1 receives the data signal from the self-repair line 15 and transmits it in the direction from the first terminal A to the second terminal B. Due to the influence of the line impedance, a difference in brightness and darkness appears in the same horizontal display area, or in the same row of pixel units. In addition, since the data signal has a certain coupling effect on the common voltage, the voltage difference between the data voltage and the common voltage is different from the preset voltage difference, which can easily lead to a decrease in pixel brightness. If the coupling frequency of the data signal to the common voltage in a display area is too high, it will further affect the display effect of the display area and affect the data signal transmitted to the faulty data line SF. Based on this, the embodiment of the present application provides a repair circuit for eliminating the problem of brightness and darkness differences and poor display effect in the same horizontal display area caused by high-frequency coupling in the area where the faulty data line is located in the display panel.

[0042] See also Figure 3 , Figure 3 A schematic diagram of the layout of the first display panel provided in an embodiment of the present application.

[0043] like Figure 3As shown, the display panel 10 includes a display area 10a and a non-display area 10b arranged adjacent to each other, wherein the display area 10a is provided with a plurality of scan lines G extending along a first direction F1 and sequentially arranged along a second direction F2, a plurality of data lines S extending along the second direction F2 and sequentially arranged along the first direction F1, and a plurality of pixel units P arranged in an array, the pixel units P being configured to receive scan signals from the scan lines and receive data signals from the data lines S under the control of the scan signals to display images.

[0044] The non-display area 10b is provided with a timing control circuit 11, a data driving circuit 12 and a scanning driving circuit 13. The timing control circuit 11 receives an image signal representing image information, a horizontal synchronization signal and a vertical synchronization signal from an external signal source, and outputs a clock signal for controlling the scanning driving circuit 13, a scanning control signal, and a data control signal for controlling the data driving circuit 12.

[0045] The data driving circuit 12 is used to output data signals (Data) to the pixel units P in the display area 10a according to the data control signal. The scan driving circuit 13 receives the timing control circuit 11 and outputs scan signals to the pixel units P in the display area 10a according to the scan control signal.

[0046] During the manufacturing process of the display panel 10, data lines S often break. For example, multiple data lines S include a faulty data line SF, which includes a first endpoint A, a second endpoint B, and a fault point SC. Here, i is an integer greater than or equal to 1. The data line between the first endpoint A and the fault point SC is a first sub-faulty line sf1, and the data line between the second endpoint B and the fault point SC is a second sub-faulty line sf2. The second sub-faulty line sf2 is connected to the data driving circuit 12 via the second endpoint B. The first sub-faulty line sf1 is away from the data driving circuit 12 and electrically disconnected from the data driving circuit 12. Since the second sub-faulty line sf2 is connected to the data driving circuit 12, it can still receive data signals from the data driving circuit 12. However, since the first sub-faulty line sf1 is disconnected from the data driving circuit 12, it cannot receive data signals from the data driving circuit 12.

[0047] In this embodiment, the display panel 10 further includes a repair circuit 14, a repair line 15, a signal output circuit 16, and a feedback adjustment circuit 17. Among them, the timing control circuit 11 is electrically connected to the signal output circuit 16, the signal output circuit is electrically connected to the repair circuit 14, and the repair circuit 14 is also electrically connected to the data driving circuit 12 and the repair line 15. The timing control circuit 11 is configured to determine the coupling frequency between the data line and the common electrode in the preset display area, and control the signal output circuit 16 to output different control signals to the repair circuit 14 according to different coupling frequencies. The repair circuit 14 adjusts the voltage of the data signal received from the data driving circuit 12 to different degrees according to different control signals and transmits it to the first sub-fault line sf1 through the repair line 15. Among them, the preset display area is the display area where the faulty data line SF is located. Among them, the coupling frequency can be understood as the number of couplings between the data line and the common electrode in the preset display area when each frame of image is displayed.

[0048] The feedback adjustment circuit 17 is electrically connected to the signal output circuit 16 and the common electrode Vcom, and is configured to adjust the common voltage under the control of the signal output circuit to control the voltage difference between the common voltage and the data signal received by the first sub-fault line within a preset range.

[0049] Please refer to Figure 4 , Figure 4 which is a flowchart of an adjustment and repair method provided by an embodiment of the present application.

[0050] As Figure 4 shown, the specific adjustment and repair method includes:

[0051] S101, determining the coupling frequency between the data line and the common electrode in the preset display area.

[0052] S102, adjusting the data signal output to the first sub-fault line or adjusting the common voltage according to the detected coupling frequency to control the voltage difference between the data signal and the common voltage within a preset range.

[0053] Specifically, please continue to refer to Figure 5 , Figure 5 which is a schematic diagram of the division of the display area.

[0054] As Figure 5 shown, the display area 10a includes multiple sub-areas. For example, the display area 10a can be divided into 4 sub-areas, namely the first sub-area 101, the second sub-area 102, the third sub-area 103, and the fourth sub-area 104. The four sub-areas are pieced together to form a "field"-shaped display area 10a. Of course, in other embodiments, the display area 10a can also be divided into other numbers of sub-areas and other division forms. The embodiments of the present application do not limit this.

[0055] Taking the faulty data line SF in the first sub-region 101 as an example, the coupling frequency detection is performed on the first sub-region 101 through the timing control circuit 11, wherein the judgment method is as follows: if the first sub-region 101 includes x data lines and y scan lines, first, the number of pixel units in each row in the first sub-region 101 receiving data signals of the same polarity is detected, and the number of rows of pixel units receiving data signals of the same polarity is determined to be greater than a first preset number n, wherein the first preset number n can be set to one tenth of the number of columns of pixel units in the first sub-region 101. In this embodiment, each data line is connected to a column of pixel units, and therefore the first preset number n is one tenth of the data line, that is, n=1 / 10x.

[0056] Then, the rows of pixel units that receive data signals of the first polarity greater than a first preset number are marked as first polarity, and the rows of pixel units that receive data signals of the second polarity greater than the first preset number are marked as second polarity. The number of pixel units with opposite polarity in every two adjacent rows is calculated. If the number of pixel units with opposite polarity in every two adjacent rows is greater than a second preset number m, it indicates that high-frequency coupling has occurred in the first sub-region 101. The second preset number m can be set to one-tenth of the number of rows of pixel units in the first sub-region 101. In this embodiment, each row of pixel units is connected to a scan line, so the second preset number m can be one-tenth of the number of scan lines, that is, m=1 / 10y.

[0057] Among them, when the grayscale of the data signal received by the pixel unit P is greater than or equal to the preset grayscale, the data signal received by the pixel unit P is a valid data signal; when the grayscale of the data signal received by the pixel unit P is less than the preset grayscale, the data signal received by the pixel unit P is not included in the calculation of the number of polarities of the data signals received by the pixel units in this row.

[0058] like Figure 6 As shown, Figure 6 Schematic diagram of the polarity of the data signal received by the pixel unit.

[0059] Taking the first row of pixel units A1 to the fourth row of pixel units A4 in the first sub-area 101 as an example, the first row of pixel units includes a first pixel unit P1, a second pixel unit P2, a third pixel unit P3, a fourth pixel unit P4, a fifth pixel unit P5, a sixth pixel unit P6, a seventh pixel unit P7, an eighth pixel unit P8, a ninth pixel unit P9 and a tenth pixel unit P10. Among them, the data signals received by the first pixel unit P1, the third pixel unit P3, the fifth pixel unit P5, the seventh pixel unit P7 and the ninth pixel unit P9 are of positive polarity, and the data signals received by the second pixel unit P2, the fourth pixel unit P4, the sixth pixel unit P6, the eighth pixel unit P8 and the tenth pixel unit P10 are of negative polarity, and the grayscale of the data signals received by the first pixel unit P1, the third pixel unit P3 and the fifth pixel unit P5 is greater than or equal to the preset grayscale, and the grayscale of the data signals received by the remaining pixel units is less than the preset grayscale. At this time, in the first row of pixel units A1, the number of valid data signals is 3, which is greater than or equal to the first preset number n=1. At this time, the first row of pixel units A1 is recorded as a pixel unit row with positive polarity.

[0060] Similarly, if it is calculated that the negative polarity data signals received by the second pixel unit P2 and the fourth pixel unit P4 in the second row of pixel units A2 are greater than or equal to the preset grayscale, and the data signals received by the remaining pixel units are less than the preset grayscale, then the number of valid data signals is 2, which is greater than or equal to the first preset number n=1. At this time, the second row of pixel units A2 is recorded as a negative polarity pixel unit row. The same method is used to calculate the third row of pixel units A3 and the fourth row of pixel units A4. If the calculation result shows that the third row of pixel units A3 is a positive polarity pixel unit row, and the fourth row of pixel units A4 is a negative polarity pixel unit row.

[0061] Then, the adjacent first row of pixel cells A1 and second row of pixel cells A2 are compared. The first row of pixel cells A1 has positive polarity, while the second row of pixel cells A2 has negative polarity, i.e., the first row of pixel cells A1 and the second row of pixel cells A2 have opposite polarity, and are recorded as a first pair of pixel cell rows with opposite polarity. The adjacent third row of pixel cells A3 and fourth row of pixel cells A4 are compared. The third row of pixel cells A3 has positive polarity, while the fourth row of pixel cells A4 has negative polarity, and are recorded as a second pair of pixel cell rows with opposite polarity. The number of pixel cells with opposite polarity in the two adjacent rows is recorded as Q. In this case, Q = 2, which is greater than the second preset number m = 0.4, indicating that a high-frequency coupling image has occurred in the first sub-region 101. Since this example only selects four rows of pixel cells for illustration, the second preset number m = 4 × 0.1 = 0.4. In other embodiments, the second preset number m can be another integer based on the number of pixel cell rows.

[0062] After determining the coupling frequency of the first sub-region 101, the data signal is further adjusted by controlling the repair circuit 14 according to the coupling frequency, wherein, if Q is within the first preset range (a, b), indicating that the coupling frequency of the first sub-region 101 is the first frequency, the timing control circuit 11 controls the signal output circuit 16 to output the first control signal to the repair circuit 14, so as to control the repair circuit 14 to adjust the received data signal to the first preset voltage; if Q is within the second preset range (b, c), indicating that the coupling frequency of the first sub-region 101 is the second frequency, the timing control circuit 11 controls the signal output circuit 16 to output the second control signal to the repair circuit 14, so as to control the repair circuit 14 to adjust the received data signal to the first preset voltage. 4 adjusts the received data signal to a second preset voltage; if Q is within a third preset range (c, d), indicating that the coupling frequency of the first sub-region 101 is the third frequency, the timing control circuit 11 controls the signal output circuit 16 to output a third control signal to the repair circuit 14 to control the repair circuit 14 to adjust the received data signal to the third preset voltage; if Q is within a fourth preset range (d, e), indicating that the coupling frequency of the first sub-region 101 is the fourth frequency, the timing control circuit 11 controls the signal output circuit 16 to output a fourth control signal to the repair circuit 14 to control the repair circuit 14 to adjust the received data signal to the fourth preset voltage, where a < b < c < d. Of course, in other embodiments, the preset ranges can be divided into other numbers, such as 3, 5, 6, etc., according to specific needs, so as to correspond to different numbers of coupling frequencies, and this application is not limited to this.

[0063] See also Figure 7 , Figure 7 for Figure 3 Equivalent circuit diagram of the signal output circuit in .

[0064] like Figure 7 As shown, the signal output circuit 16 includes a first input terminal 161, a second input terminal 162, a first output terminal 163, a second output terminal 164, a third output terminal 165, and a fourth output terminal 166. The first input terminal 161 and the second input terminal 162 are electrically connected to the timing control circuit 11, and the first output terminal 163 to the fourth output terminal 166 are electrically connected to the repair circuit 14. When the timing control circuit 11 detects high-frequency coupling in the first sub-region 101 and Q is within a first preset range (a, b), the timing control circuit 11 controls the signal output circuit 16 to output a first control signal. When Q is within a second preset range (b, c), the timing control circuit 11 controls the signal output circuit 16 to output a second control signal. When Q is within a third preset range (c, d), the timing control circuit 11 controls the signal output circuit 16 to output a third control signal. When Q is within a fourth preset range (d, e), the timing control circuit 11 controls the signal output circuit 16 to output a fourth control signal.

[0065] In this embodiment, the signal output circuit 16 can be a decoder, and the timing control circuit 11 outputs a level signal to the decoder through the first input terminal 161 and the second input terminal 162 respectively. For example, when Q is within the first preset range, the timing control circuit 11 can output a first level signal to the decoder through the first input terminal 161 and the second input terminal 162 respectively to control the decoder to output the first control signal. When Q is within the second preset range, the timing control circuit 11 outputs the first level signal to the decoder through the first input terminal 161 and the second input terminal 162 at the same time. 162 outputs a second level signal to the decoder to control the decoder to output the second control signal. When Q is within the third preset range, the timing control circuit 11 can output the second level signal to the decoder through the first input terminal 161, and at the same time output the first level signal to the decoder through the second input terminal 162 to control the decoder to output the third control signal. When Q is within the fourth preset range, the timing control circuit 11 can output the second level signal to the decoder through the first input terminal 161 and the second input terminal 162 respectively to control the decoder to output the fourth control signal.

[0066] See also Figure 8 , Figure 8 for Figure 3 Equivalent circuit diagram of the repair circuit.

[0067] like Figure 8 As shown, the repair circuit 14 includes an amplification module 141 and an adjustment module 142, wherein the amplification module 141 is electrically connected to the data driving circuit 12 and the adjustment module 142, and the adjustment module 142 is also electrically connected to the signal output circuit 16 and the repair line 15, wherein the amplification module 141 is used to receive the data signal from the data driving circuit 12 and transmit the data driving signal to the adjustment module 142, and the adjustment module 142 is used to adjust the data signal according to the control signal output by the signal output circuit 16, and transmit it to the faulty data line SF through the repair line 15 after adjustment.

[0068] Specifically, the amplification module 141 includes a first amplifier 141a and a first filtering unit 141b, wherein the positive-phase terminal of the first amplifier 141a is connected to the data driving circuit 12, the inverting terminal of the first amplifier 141a is electrically connected to the ground terminal GND, and the output terminal of the first amplifier 141a is electrically connected to the adjustment module 142. The first filtering unit 141b includes a first filtering resistor FR1 and a first filtering capacitor FC1, wherein the first filtering resistor FR1 is electrically connected between the inverting terminal and the output terminal of the first amplifier 141a, and the first filtering capacitor FC1 is electrically connected between the inverting terminal of the first amplifier 141a and the ground terminal GND.

[0069] The adjustment module 142 includes at least two adjustment units, each configured to simultaneously adjust received data under the control of a control signal. In this embodiment, the adjustment module 142 includes a first adjustment unit 142a, a second adjustment unit 142b, a third adjustment unit 142c, and a fourth adjustment unit 142d. The first adjustment unit 142a is electrically connected to the output terminal of the first amplifier 141a, the first output terminal 163 of the signal output circuit 16, and the repair line 15. The first adjustment unit 142a is configured to receive a data signal from the output terminal of the first amplifier 141a under the control of a first control signal output from the first output terminal 163, adjust the voltage of the data signal, and transmit the data signal to the first sub-fault line sf1 via the repair line 15. The second adjustment unit 142b is configured to receive a data signal from the output terminal of the first amplifier 141a under the control of a second control signal output from the second output terminal 164, adjust the voltage of the data signal, and transmit the data signal to the first sub-fault line sf1 via the repair line 15. The third adjustment unit 142c is configured to receive a data signal from the output terminal of the first amplifier 141a under the control of a third control signal outputted from the third output terminal 165, adjust the voltage of the data signal, and transmit the data signal to the first sub-fault line sf1 via the repair line 15. The fourth adjustment unit 142d is configured to receive a data signal from the output terminal of the first amplifier 141a under the control of a fourth control signal outputted from the fourth output terminal 166, adjust the voltage of the data signal, and transmit the data signal to the first sub-fault line sf1 via the repair line 15. In other embodiments, the number of adjustment units may be different as needed, and this application is not limited thereto.

[0070] Specifically, the first adjustment unit 142a includes a first switch tube T1 and a first resistor R1. The control end of the first switch tube is electrically connected to the first output end 163, the first conductive end of the first switch tube is electrically connected to the output end of the first amplifier 141a, the second conductive end of the first switch tube is electrically connected to the first end of the first resistor R1, and the second end of the first resistor R1 is electrically connected to the repair line 15. The first switch tube T1 is used to be turned on under the control of the first control signal to control the data signal to be transmitted to the repair line 15 through the first resistor R1, that is, to adjust the data signal through the first resistor R1.

[0071] The second adjustment unit 142b includes a second switch tube T2 and a second resistor R2. The control end of the second switch tube is electrically connected to the first output end 163, the first conductive end of the second switch tube is electrically connected to the output end of the first amplifier 141a, the second conductive end of the second switch tube is electrically connected to the first end of the second resistor R2, and the second end of the second resistor R2 is electrically connected to the repair line 15. The second switch tube T2 is used to be turned on under the control of the second control signal to control the data signal to be transmitted to the repair line 15 through the second resistor R2, that is, to adjust the data signal through the second resistor R2.

[0072] The third adjustment unit 142c includes a third switch tube T3 and a third resistor R3. The control end of the third switch tube is electrically connected to the first output end 163, the first conductive end of the third switch tube is electrically connected to the output end of the first amplifier 141a, the second conductive end of the third switch tube is electrically connected to the first end of the third resistor R3, and the second end of the third resistor R3 is electrically connected to the repair line 15. The third switch tube T3 is used to be turned on under the control of a third control signal to control the data signal to be transmitted to the repair line 15 through the third resistor R3, that is, to adjust the data signal through the third resistor R3.

[0073] The fourth adjustment unit 142d includes a fourth switch tube T4 and a fourth resistor R4. The control end of the fourth switch tube is electrically connected to the first output end 163, the first conductive end of the fourth switch tube is electrically connected to the output end of the first amplifier 141a, the second conductive end of the fourth switch tube is electrically connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is electrically connected to the repair line 15. The fourth switch tube T4 is used to be turned on under the control of the fourth control signal to control the data signal to be transmitted to the repair line 15 through the fourth resistor R4, that is, to adjust the data signal through the fourth resistor R4.

[0074] The resistance values of the first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 increase in sequence.

[0075] That is to say, when the number Q of pixel units with opposite polarities in two adjacent rows is within a first preset range, the first resistor R1 is controlled to adjust the received data signal; when Q is within a second preset range, the second resistor R2 is controlled to adjust the received data signal; when Q is within a third preset range, the third resistor R3 is controlled to adjust the received data signal; and when Q is within a fourth preset range, the fourth resistor R4 is controlled to adjust the received data signal.

[0076] In response to different coupling degrees of the data signal to the common voltage, the control repair circuit 14 adjusts the data signal to maintain the voltage difference between the data signal and the common voltage within a preset range, effectively avoiding the problem of poor compensation effect due to excessively high coupling frequency, that is, reducing the coupling frequency in the preset display area, thereby improving the repair effect of the first sub-fault line.

[0077] See also Figure 9 , Figure 9 for Figure 3 Equivalent circuit diagram of the feedback regulation circuit.

[0078] like Figure 9As shown, the feedback regulation circuit 17 is used to adjust the common voltage according to changes in the common voltage. The feedback regulation circuit 17 includes a second amplifier 171, a second filtering unit 172, a first regulating unit 173a, and a second regulating unit 173b. The non-inverting terminal of the second amplifier 171 is electrically connected to the common electrode Vcom, the inverting terminal of the second amplifier 171 is electrically connected to the common electrode feedback point VF, and the output terminal of the second amplifier 171 is electrically connected to the common electrode Vcom. The second filtering unit 172 is electrically connected between the common electrode feedback point VF and the inverting terminal of the second amplifier 171. The second filtering unit 172 includes a second filter resistor FR2 and a second filter capacitor FC2. The second filter resistor FR2 and the second filter capacitor FC2 are connected in series between the common electrode feedback point VF and the inverting terminal of the second amplifier 171.

[0079] The first regulating unit 173 a is electrically connected between the signal output circuit 16 and the inverting terminal and the output terminal of the second amplifier 171 . The second regulating unit 173 b is electrically connected between the signal output circuit 16 and the inverting terminal and the output terminal of the second amplifier 171 .

[0080] The first regulating unit 173 a and the second regulating unit 173 b are configured to be turned on under the control of the signal output circuit 16 , so that the first regulating unit 173 a or the second regulating unit 173 b is electrically connected to the inverting terminal and the output terminal of the second amplifier 171 .

[0081] Specifically, the first regulating unit 173a includes a fifth switch transistor T5 and a fifth resistor R5. The control terminal of the fifth switch transistor is electrically connected to the first output terminal 163 of the signal output circuit 16. The first conductive terminal of the fifth switch transistor T5 is electrically connected to the fifth resistor R5. The second terminal of the fifth switch transistor T5 is electrically connected to the output terminal of the second amplifier 171. The fifth resistor R5 is electrically connected between the inverting terminal of the second amplifier 171 and the first conductive terminal of the fifth switch transistor. The fifth switch transistor T5 is configured to be turned on in response to a first control signal output from the first output terminal 163 of the signal output circuit, thereby controlling the fifth resistor R5 to perform feedback regulation on the common voltage.

[0082] The second regulating unit 173b includes a sixth switch transistor T6 and a sixth resistor R6. The control terminal of the sixth switch transistor is electrically connected to the first output terminal 163 of the signal output circuit 16, the first conductive terminal of the sixth switch transistor is electrically connected to the sixth resistor R6, the second terminal of the sixth switch transistor T6 is electrically connected to the output terminal of the second amplifier 171, and the sixth resistor R6 is electrically connected between the inverting terminal of the second amplifier 171 and the first conductive terminal of the sixth switch transistor. The sixth switch transistor T6 is configured to conduct in response to a first control signal output from the first output terminal 163 of the signal output circuit, thereby controlling the sixth resistor R6 to perform feedback regulation on the common voltage.

[0083] In response to different coupling degrees of the data signal to the common voltage, the control feedback regulation circuit 17 compensates the common voltage to maintain the voltage difference between the data signal and the common voltage within a preset range, effectively eliminating the problem of poor compensation effect caused by excessively high coupling frequency, that is, reducing the coupling frequency in the preset display area, thereby improving the repair effect of the first sub-fault line.

[0084] The repair circuit 14 and the feedback regulation circuit 17 can be adjusted simultaneously. When the repair circuit 14 adjusts the data signal, the feedback regulation circuit 17 can be controlled to adjust the common voltage to increase the compensation speed and enhance the compensation effect.

[0085] Of course, the repair circuit 14 and the feedback regulation circuit 17 can also be controlled to make adjustments separately. For example, when the number Q of pixel units with opposite polarity in two adjacent rows is within a first preset range to a fourth preset range, i.e., Q∈(a,e), the repair circuit 14 can be controlled to adjust the data signal. When the number Q of pixel units with opposite polarity in two adjacent rows is within a fifth preset range (e,f), the feedback regulation circuit 17 can be controlled to adjust the common voltage. When the number Q of pixel units with opposite polarity in two adjacent rows is large, the data voltage fluctuates significantly when the repair circuit 14 adjusts the data signal, potentially affecting the common voltage. Therefore, when Q∈(e,f), adjusting the common voltage by the feedback regulation circuit 17 can effectively prevent the impact of large data voltage fluctuations on the common voltage. In other words, by making separate adjustments by the repair circuit 14 and the feedback regulation circuit 17 when Q is within different ranges, the compensation effect can be further improved, thereby effectively maintaining the voltage difference between the data signal and the common electrode, reducing the brightness difference between the pixel unit connected to the faulty data line and the adjacent pixel units, and improving the display effect.

[0086] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A display panel comprising a data driving circuit, a plurality of data lines sequentially arranged along a first direction and extending along a second direction, and a plurality of pixel units, wherein the data driving circuit is configured to output a data signal and transmit the data signal to the pixel units through the data lines to control the pixel units to display an image; At least one faulty data line is provided in a preset display area of the display panel, the faulty data line including a fault point, a first sub-fault line, and a second sub-fault line, the first sub-fault line and the second sub-fault line are disconnected from the fault point, and the first sub-fault line receives a data signal from the data driving circuit via a repair line; The display panel also includes a timing control circuit and a repair circuit. The repair circuit is electrically connected to the data driving circuit and the timing control circuit. The timing control circuit is used to detect the coupling frequency between the data line and the common electrode in the preset display area, and control the repair circuit to adjust the received data signal to a preset value and transmit it to the first sub-fault line based on the detected coupling frequency.

2. The display panel according to claim 1, wherein The display panel also includes a signal output circuit, which is electrically connected to the timing control circuit and the repair circuit, and is used to output at least two control signals to the repair circuit under the control of the timing control circuit. The repair circuit adjusts the received data signal to the preset value based on the control signal.

3. The display panel according to claim 2, wherein: The repair circuit includes an amplification module and an adjustment module. The amplification module is electrically connected to the data driving circuit and the adjustment module. The adjustment module is electrically connected to the signal output circuit and the repair line. The amplification module is used to receive the data signal from the data driving circuit and transmit it to the adjustment module after amplification. The adjustment module is used to adjust the data signal under the control of the control signal output by the signal output circuit.

4. The display panel according to claim 3, wherein: The amplification module includes a first amplifier and a first filtering unit. The non-phase end of the first amplifier is electrically connected to the data driving circuit, the inverting end of the first amplifier is electrically connected to the first filtering unit, the output end of the first amplifier is electrically connected to the adjustment module, and the first filtering unit is also electrically connected to the ground end and the output end of the first amplifier. The first amplifier is used to amplify the data signal output by the data driving circuit and transmit it to the adjustment module.

5. The display panel according to claim 4, wherein: The adjustment module at least includes a first adjustment unit and a second adjustment unit, wherein the first adjustment unit and the second adjustment unit are connected in parallel between the output terminal of the first amplifier and the repair line; The first adjustment unit is also electrically connected to the signal output circuit and is used to adjust the data signal according to the first control signal output by the signal output circuit. The second adjustment unit is also electrically connected to the signal output circuit and is used to adjust the data signal according to the second control signal output by the signal output circuit.

6. The display panel according to claim 5, wherein: The first adjustment unit includes a first switch tube and a first resistor, and the second adjustment unit includes a second switch tube and a second resistor. The control end of the first switch tube is electrically connected to the signal output circuit, the first conductive end of the first switch tube is electrically connected to the amplification module, the second end of the first switch tube is electrically connected to the first end of the first resistor, and the second end of the first resistor is electrically connected to the repair line. The first switch tube is configured to be turned on under the control of the first control signal to control the first resistor to adjust the data signal; The control end of the second switch tube is electrically connected to the signal output circuit, the first conductive end of the second switch tube is electrically connected to the amplification module, the second end of the second switch tube is electrically connected to the first end of the second resistor, and the second end of the second resistor is electrically connected to the repair line. The second switch tube is used to be turned on under the control of the second control signal to control the second resistor to adjust the data signal, wherein the first resistor is smaller than the second resistor.

7. The display panel according to claim 6, wherein: The display panel further includes a feedback regulation circuit, the feedback regulation circuit being electrically connected to the signal output circuit and the common electrode, and the feedback regulation circuit being configured to adjust the common voltage under the control of the signal output circuit so as to control the voltage difference between the common voltage and the data signal received by the first sub-fault line to be within a preset range; The feedback regulation circuit includes a second amplifier, a second filtering unit, a first regulation unit and a second regulation unit, the non-phase end of the second amplifier is electrically connected to the common electrode, the inverting end of the second amplifier is electrically connected to the common electrode feedback point, the output end of the second amplifier is electrically connected to the common electrode, the second filtering unit is electrically connected between the common electrode feedback point and the inverting end of the second amplifier, the first regulation unit is electrically connected to the signal output circuit and between the inverting end and the output end of the second amplifier, and the second regulation unit is electrically connected to the signal output circuit and between the inverting end and the output end of the second amplifier; the first regulation unit or the second regulation unit is used to cooperate with the second amplifier to adjust the common voltage under the control of the signal output circuit.

8. A method for repairing a display panel, characterized in that: The display panel according to any one of claims 5 to 7 comprises: determining a coupling frequency between the data line and the common electrode in the preset display area; According to the detected coupling frequency, the data signal output to the first sub-fault line is adjusted or the common voltage is adjusted to control the voltage difference between the common voltage and the data signal to be within a preset range.

9. The display panel repair method according to claim 8, wherein: detecting the number of pixel units in each row in the preset display area that receive data signals of the same polarity, and determining the number of pixel unit rows where the number of pixel units that receive data signals of the same polarity is greater than a first preset number, where the first preset number is one-tenth of the total number of pixel unit columns in the preset display area; A pixel unit row in which the number of pixel units receiving the first polarity data signal is greater than the first preset number is recorded as the first polarity, and a pixel unit row in which the number of pixel units receiving the second polarity data signal is greater than the first preset number is recorded as the second polarity, and the number of pixel units with opposite polarities in every two adjacent rows is calculated.

10. The display panel repair method according to claim 9, wherein: When the number of pixel units with opposite polarities in every two adjacent rows in the preset display area is within a first preset range, indicating that the coupling frequency of the preset display area is a first frequency, controlling the first adjustment unit to adjust the data signal; When the number of pixel units with opposite polarities in every two adjacent rows in the preset display area is within a second preset range, the coupling frequency of the preset display area is characterized as a second frequency, and the second adjustment unit is controlled to adjust the data signal, wherein the first frequency is less than the second frequency.

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