Display panel, broken line repairing method and display device

Abstract

The invention discloses a display panel, a broken line repairing method and a display device.The display panel comprises at least one data line repairing unit, each data line repairing unit comprises a first repairing line, a second repairing line and a compensation adjusting circuit, the signal receiving end of each compensation adjusting circuit is connected with the corresponding first repairing line, and the signal receiving end of each compensation adjusting circuit is connected with the corresponding second repairing line. The signal transmitting end of the compensation adjusting circuit is connected with the second repair line; and when the data line is broken, the first repair line and the broken data line are welded at a corresponding first repair point, and the second repair line and the broken data line are welded at a corresponding second repair point, the compensation adjusting circuit is used for compensating the jump edge voltage of the data signal passing through the first repair line. By means of the design, data signal attenuation caused by impedance of the repairing line is avoided, pixels at the two ends of the broken data line can obtain sufficient electric quantity within the charging time, and the picture display effect of the repaired display panel is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a broken line repairing method and a display device. BACKGROUND

[0002] The display panel contains a pixel array composed of a plurality of pixel units, and a scan line and a data line connected to the corresponding pixel unit. The driving circuit of the display panel includes a scan driving circuit and a data driving circuit, etc. The scan driving circuit provides a scan signal to the corresponding pixel unit through the scan line to select a row of pixel units, and the data driving circuit provides a data signal to the corresponding pixel unit through the data line, so that the selected pixel unit displays according to the data signal, so that the display panel can display a picture.

[0003] However, during the manufacturing process of the display panel, due to various reasons, there will be a problem of broken data line in part of the data line, so that the data line with broken line will show a vertical dark line when the display panel is lighted. In view of this phenomenon, at present, generally by setting a repair line, and connecting the broken data line with the data driving circuit to the repair line, and providing a data signal to the broken data line with the data driving circuit, so that the corresponding pixel unit of the broken data line with the data driving circuit can be lighted. However, due to the existence of large impedance on the repair line, it is inevitable to increase the attenuation of the data signal, so that the jump edge (rising edge) of the data signal is flat, and it takes longer time to reach the target charging voltage, so that the pixel unit on the repaired data line is not charged enough in the charging time, resulting in that the display panel still appears dark line when lighted, so that the picture display effect of the repaired display panel is not good enough. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a display panel, a broken line repairing method and a display device, so as to improve the picture display effect of the display panel after repairing the broken data line.

[0005] The embodiment of the present application discloses a display panel, which comprises a plurality of parallel arranged data lines and at least one data line repair unit, the data line repair unit comprises a first repair line, a second repair line and a compensation adjusting circuit, the first repair line is located at one end of the plurality of data lines receiving data signals, and is arranged in a cross layer with the plurality of data lines, the intersection position of the first repair line and the plurality of data lines forms a plurality of first repair points; the second repair line is located at one end of the plurality of data lines away from the first repair line, and is arranged in a cross layer with the plurality of data lines, the intersection position of the second repair line and the plurality of data lines forms a plurality of second repair points, and the second repair points correspond to the first repair points one by one; the signal receiving end of the compensation adjusting circuit is connected with the first repair line, and the signal sending end of the compensation adjusting circuit is connected with the second repair line; when the data line is broken, the first repair line and the broken data line are welded at the corresponding first repair point, and the second repair line and the broken data line are welded at the corresponding second repair point, the compensation adjusting circuit is used for compensating the jump edge voltage of the data signal passing through the first repair line.

[0006] Optionally, the compensation adjusting circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, an analog inductor, a compensation resistor and a compensation capacitor, the first transistor, the third transistor and the fifth transistor are first type transistors, the second transistor, the fourth transistor and the sixth transistor are second type transistors; the compensation adjusting circuit comprises a signal receiving end, a signal sending end and a signal control end, the input ends of the first transistor, the second transistor and the sixth transistor are electrically connected with the signal receiving end, the control ends of the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor and the sixth transistor are electrically connected with the signal control end, and the output ends of the second transistor and the third transistor are electrically connected with the signal sending end; the output end of the first transistor is electrically connected with one end of the analog inductor, the other end of the analog inductor is electrically connected with the first end of the compensation resistor, the second end of the compensation resistor is electrically connected with the input end of the third transistor, the second end of the compensation resistor is also electrically connected with one end of the compensation capacitor, the other end of the compensation capacitor is electrically connected with the input end of the fifth transistor, the output end of the fifth transistor is electrically connected with a ground end, the input end of the fourth transistor is electrically connected with the output end of the sixth transistor, the output end of the fourth transistor is electrically connected with the first end of the compensation resistor, and the output end of the sixth transistor is also electrically connected with the input end of the fifth transistor.

[0007] Optionally, the signal regulation end is configured to receive a first control signal at a compensation time t0 and a second control signal at a normal time, the first control signal being configured to control the first transistor, the third transistor and the fifth transistor to be turned on, and the second control signal being configured to control the second transistor, the fourth transistor and the sixth transistor to be turned on; the compensation time t0 satisfies the condition: wherein L represents an inductance value of the analog inductor, C represents a capacitance value of the compensation capacitor, and R0 represents a resistance value of the compensation resistor; and wherein the compensation time and the normal time are located within a row of pixel scanning time.

[0008] Optionally, the analog inductor comprises an equivalent resistor and an equivalent transistor, an input end of the equivalent transistor is electrically connected to an output end of the first transistor, an output end of the equivalent transistor is electrically connected to a first end of the compensation resistor, one end of the equivalent resistor is electrically connected to the input end of the equivalent transistor, and the other end of the equivalent resistor is electrically connected to a control end of the equivalent transistor; the equivalent resistor and the equivalent transistor satisfy the condition: wherein R L represents a resistance value of the equivalent resistor, Cgs represents a gate-source parasitic capacitance of the equivalent transistor, and gm represents a transconductance of the equivalent transistor.

[0009] Optionally, the farther the break point of the broken data line is from the first repair line, the smaller the compensation time is.

[0010] Optionally, the display panel comprises pixel switches arranged in an array and configured to control pixels, and the compensation adjustment circuit is arranged in the same layer as the pixel switches.

[0011] Optionally, the display panel comprises a plurality of data line repair units, the plurality of data line repair units are arranged side by side in a direction perpendicular to the data line, and the compensation adjustment circuit in at least one of the data line repair units is located in a display area of the display panel.

[0012] Embodiments of the present application also disclose a broken line repair method, which is used for the display panel as described above, and the broken line repair method comprises the steps of:

[0013] identifying a broken data line;

[0014] welding the broken data line and a first repair line at a corresponding first repair point;

[0015] welding the broken data line and a second repair line at a corresponding second repair point; and

[0016] controlling the compensation adjustment circuit to compensate for the rising edge voltage of the data signal passing through the first repair line.

[0017] Optionally, in the step of identifying the data line with a broken line, comprising:

[0018] identifying the position of the data line breakpoint; and

[0019] obtaining the compensation time corresponding to the breakpoint position by looking up a table;

[0020] In the step of controlling the compensation adjustment circuit to compensate for the rising edge voltage of the data signal passing through the first repair line, comprising: controlling the compensation adjustment circuit to compensate for the rising edge voltage of the data signal passing through the first repair line within the compensation time.

[0021] The display device provided by the embodiment of the present application comprises a driving circuit and a display panel as described above, and the driving circuit is used to drive the display panel.

[0022] The embodiment of the present application has the following beneficial effects: by adding a data line repair unit in the display panel, when a data line is broken, one end of the data line is welded to the first repair line at a first repair point, and the other end of the data line is welded to the second repair line at a second repair point, after which the data signal can be input from one end of the data line, and can also be input to the other end of the data line from the first repair line, the compensation adjustment circuit and the second repair line, so that the pixels connected to the data line can emit light, thereby solving the problem of dark lines caused by the broken data line when the display panel is lit. Moreover, the embodiment of the present application also compensates for the rising edge voltage of the data signal passing through the first repair line through the compensation adjustment circuit, so that the rising edge voltage of the data signal is increased, avoiding the problem of data signal attenuation caused by the impedance of the first repair line and the second repair line, and thus the pixels at both ends of the broken data line can obtain sufficient power in the charging time, thereby ensuring the picture display effect of the repaired display panel. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings included to provide a further understanding of the embodiments of the present application and constitute a part of the specification, serve to explain the principles of the present application together with the text description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings. In the drawings:

[0024] Figure 1 is a schematic diagram of a first display panel provided by the first embodiment of the present application;

[0025] Figure 2is a schematic diagram of a second display panel provided by a first embodiment of the present application;

[0026] Figure 3 is a schematic diagram of a third display panel provided by a first embodiment of the present application;

[0027] Figure 4 is a schematic diagram of a compensation adjustment circuit provided by a first embodiment of the present application;

[0028] Figure 5 is a schematic diagram of an analog inductor provided by a first embodiment of the present application;

[0029] Figure 6 is a schematic diagram of a compensation waveform and timing provided by a first embodiment of the present application;

[0030] Figure 7 is a waveform comparison schematic diagram provided by a first embodiment of the present application;

[0031] Figure 8 is a flowchart of a broken line repair method provided by a second embodiment of the present application;

[0032] Figure 9 is a flowchart of another broken line repair method provided by a second embodiment of the present application;

[0033] Figure 10 is a schematic diagram of a first display device provided by a third embodiment of the present application;

[0034] Figure 11 is a schematic diagram of a second display device provided by a third embodiment of the present application.

[0035] wherein, 10, display device; 20, driving circuit; 21, source driving chip; 22, controller; 23, register; 30, display panel; 100, data line; 200, data line repair unit; 210, first repair line; A, first repair point; 220, second repair line; B, second repair point; 230, compensation adjustment circuit; T1, first transistor; T2, second transistor; T3, third transistor; T4, fourth transistor; T5, fifth transistor; T6, sixth transistor; 231, analog inductor; 232, compensation resistor; 233, compensation capacitor; 234, equivalent resistor; 235, equivalent transistor. DETAILED DESCRIPTION

[0036] It should be understood that the terms used herein, the specific structures and functional details disclosed, are merely for the purpose of describing specific embodiments, and are representative, but the present application can be embodied in many alternative forms, and should not be interpreted as being limited to the embodiments set forth herein.

[0037] In addition, unless otherwise explicitly specified and limited, "connected", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] As shown in Figure 1 The first display panel 30 provided by the first embodiment of the present application includes a plurality of parallel data lines 100 and a plurality of parallel scan lines, the plurality of data lines 100 and the plurality of scan lines are arranged in a grid shape, and the display area of the display panel 30 is divided into a plurality of pixel regions arranged in an array.

[0039] It should be noted that Figure 1 The arrows on the wires in the drawings represent the transmission direction of the signals.

[0040] The display panel 30 further comprises a data line repair unit 200, the data line repair unit 200 comprises a first repair line 210, the first repair line 210 is located at one end of the plurality of data lines 100 receiving data signals, and is arranged in a different layer from all the data lines 100, the intersection position of the first repair line 210 and all the data lines 100 forms a plurality of first repair points A, and the number of first repair points A is the same as the number of data lines 100. Wherein, the different layer cross arrangement means cross but not connected, that is, the first repair line 210 and the data line 100 are arranged on different wiring layers, but the first repair line 210 and the data line 100 have intersection on the orthographic projection of the glass substrate of the display panel 30; In order to ensure the isolation of the first repair line 210 and the data line 100, an insulating layer is arranged between the two wiring layers to isolate, and the electrical connection between the first repair line 210 and the corresponding data line 100 can be realized by fusion or welding at the intersection point.

[0041] The data line repair unit 200 further comprises a second repair line 220, which is located at one end of the data line 100 away from the first repair line 210 and is arranged in a different layer from all the data lines 100, and the intersection of the second repair line 220 and all the data lines 100 forms a plurality of second repair points B, the number of the second repair points B is the same as that of the first repair points A, and the second repair points B correspond to the first repair points A one by one, that is, each data line 100 forms a first repair point A and a second repair point B between the first repair line 210 and the second repair line 220. Among them, the second repair line 220 and the data line 100 are arranged on different wiring layers, and the orthogonal projection of the second repair line 220 and the data line 100 on the glass substrate of the display panel 30 intersects; in order to ensure the isolation of the second repair line 220 and the data line 100, an insulating layer is arranged between the two wiring layers for isolation, and the second repair line 220 and the corresponding data line 100 can be electrically connected by fusion or welding at the intersection.

[0042] Among them, the first repair line 210 and the second repair line 220 can be arranged on the same layer to facilitate wiring design. Of course, in other embodiments, the first repair line 210 and the second repair line 220 can also be arranged on different layers and isolated by an insulating layer.

[0043] The data line repair unit 200 further comprises a compensation adjustment circuit 230, a signal receiving end of the compensation adjustment circuit 230 is connected with the first repair line 210, and a signal sending end of the compensation adjustment circuit 230 is connected with the second repair line 220; when a data line 100 is broken, the first repair line 210 and the broken data line 100 are welded at the corresponding first repair point A, and the second repair line 220 and the broken data line 100 are welded at the corresponding second repair point B, at this time, the compensation adjustment circuit 230 is used to compensate the jump edge voltage of the data signal passing through the first repair line 210.

[0044] It should be noted that the jump edge voltage includes rising edge voltage and falling edge voltage, the present embodiment can not only compensate the rising edge voltage to improve the rising effect of the voltage, increase the charging time of the pixel, and avoid the problem of data signal attenuation caused by the impedance of the first repair line 210 and the second repair line 220; moreover, the present embodiment can also compensate the falling edge voltage to slow down the voltage drop effect, increase the charging time of the pixel, and also avoid the problem of data signal attenuation caused by the impedance of the first repair line 210 and the second repair line 220.

[0045] As Figure 1As shown, when the data line 100 is broken and a breakpoint C is generated, the data line 100 and the first repair line 210 are welded at the first repair point A1, and the data line 100 and the second repair line 220 are welded at the second repair point B1. At this time, the data signal not only passes through the path from A1 to C, but also passes through the path from A1 to B1 to C, so that the broken data line 100 can receive the data signal at the A1C segment and the B1C segment, and the purpose of repairing the data line 100 is achieved.

[0046] Moreover, in the path of the data signal from A1 to B1 to C, the data signal needs to pass through the first repair line 210, the compensation adjustment circuit 230 and the second repair line 220, and the data signal V D After entering the compensation adjustment circuit 230, the compensation adjustment circuit 230 compensates the jump edge voltage of the data signal V C under the control of the control signal V D , so as to form a compensation signal V0 and output the compensation signal V0 to the second repair line 220.

[0047] The embodiment of the present application adds a data line repair unit 200 in the display panel 30. When the data line 100 is broken, one end of the data line 100 is welded with the first repair line 210 at the first repair point A, and the other end of the data line 100 is welded with the second repair line 220 at the second repair point B. After that, the data signal can be input from not only one end of the data line 100, but also the first repair line 210, the compensation adjustment circuit 230 and the second repair line 220 to the other end of the data line 100, so that the pixels connected to the data line 100 can emit light, thereby solving the problem of dark lines caused by the broken data line 100 when the display panel 30 is lighted. Moreover, the embodiment of the present application also compensates the jump edge voltage of the data signal passing through the first repair line 210 through the compensation adjustment circuit 230, so that the jump edge voltage of the data signal is increased, the problem of data signal attenuation caused by the impedance of the first repair line 210 and the second repair line 220 is avoided, and then the pixels at both ends of the broken data line 100 can obtain sufficient power in the charging time, thereby guaranteeing the picture display effect of the repaired display panel 30.

[0048] In the embodiment of the present application, the data line repair unit 200 can be located in the non-display area of the display panel 30, so as to avoid affecting the display aperture ratio when the data line repair unit 200 is arranged in the display panel 30.

[0049] As shown in FIG. 1, the display panel 30 provided by the first embodiment of the present application is different from the display panel 30 in FIG. 1 in that, Figure 2 Figure 1 As shown in FIG. 1, the display panel 30 provided by the first embodiment of the present application is different from the display panel 30 in FIG. 1 in that, Figure 2 ​The display panel 30 has two data line repair units 200, which are arranged opposite to each other. The compensation adjustment circuits 230 in the two data line repair units 200 are respectively located in the non-display areas on both sides. The two ends of a part of the data lines 100 correspond to the first repair line 210 and the second repair line 220 in one data line repair unit 200 to form multiple first repair points A and multiple second repair points B, respectively. The two ends of another part of the data lines 100 correspond to the first repair line 210 and the second repair line 220 in the other data line repair unit 200 to form multiple first repair points A and multiple second repair points B, respectively.

[0050] Through the above design, if two broken data lines 100 appear, and these two broken data lines 100 appear in the areas corresponding to the two data line repair units 200, the two broken data lines 100 can be repaired separately, thereby avoiding the design of the data line repair unit 200 in the display panel 30 affecting the display aperture ratio, and can also increase the number of broken data lines 100 repaired, thereby improving the practicality of the product.

[0051] like Figure 3 As shown, the third display panel 30 provided in the first embodiment of the present application is Figure 2 The difference between the display panel 30 is that, Figure 3 The display panel 30 has three data line repair units 200, which are arranged in parallel along a direction perpendicular to the data line 100. At this time, the data line 100 in the display panel 30 is divided into three parts. The first repair line 210 and the second repair line 220 in the first data line repair unit 200 respectively form multiple first repair points A and multiple second repair points B corresponding to the two ends of the first part of the data line 100. The first repair line 210 and the second repair line 220 in the second data line repair unit 200 respectively form multiple first repair points A and multiple second repair points B corresponding to the two ends of the second part of the data line 100. The first repair line 210 and the second repair line 220 in the third data line repair unit 200 respectively form multiple first repair points A and multiple second repair points B corresponding to the two ends of the third part of the data line 100. When the first, second and third data lines 100 are all broken and breakpoints C appear, the three broken data lines 100 can be repaired, thereby increasing the number of repaired data lines 100.

[0052] Moreover, the number of data lines 100 in the first, second and third data line repair units 200 is the same or similar, the three data line repair units 200 have the same configuration, the load of the repair lines in the three data line repair units 200 is similar, the compensation effect of the compensation adjustment circuit 230 in the three data line repair units 200 is the same, the same compensation effect can be achieved, and the problem of increased design difficulty caused by targeted compensation calculation on the repair lines in each data line repair unit 200 can be avoided.

[0053] In other embodiments, the display panel 30 can also have more data line repair units 200 to repair more broken data lines 100. The specific design can be selected according to the actual situation, which is not limited here.

[0054] In some embodiments, the display panel 30 includes pixel switches arranged in an array and used to control pixels, and the compensation adjustment circuit 230 is arranged in the same layer as the pixel switches. Since the pixel switches generally use thin film transistors, the process of the thin film transistors includes deposition and etching of multiple metal layers and multiple insulating layers, and the devices in the compensation adjustment circuit 230 are composed of metal parts and insulating parts. Therefore, when the pixel switches are manufactured, only the mask pattern needs to be changed, and the compensation adjustment circuit 230 can be manufactured synchronously, thereby realizing the same layer arrangement of the compensation adjustment circuit 230 and the pixel switches, improving the integration degree, and avoiding the increase of process technology and cost.

[0055] Especially when the display panel 30 has more than three data line repair units 200, the compensation adjustment circuit 230 in some of the data line repair units 200 is arranged in the display area of the display panel 30. The same layer arrangement of the compensation adjustment circuit 230 and the pixel switches can avoid the interference and process problems of the compensation adjustment circuit 230.

[0056] Figure 4 is a schematic diagram of a compensation adjustment circuit provided by the first embodiment of the present application, as Figure 4As shown, the compensation adjustment circuit 230 includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, an analog inductor 231, a compensation resistor 232, and a compensation capacitor 233. The first transistor T1, the third transistor T3, and the fifth transistor T5 are transistors of a first type, and the second transistor T2, the fourth transistor T4, and the sixth transistor T6 are transistors of a second type. As a specific example, the first transistor T1, the third transistor T3, and the fifth transistor T5 are all N-type transistors, and the second transistor T2, the fourth transistor T4, and the sixth transistor T6 are all P-type transistors. Of course, the first transistor T1, the third transistor T3, and the fifth transistor T5 can also all be P-type transistors, and the second transistor T2, the fourth transistor T4, and the sixth transistor T6 can all be N-type transistors.

[0057] The compensation adjustment circuit 230 includes a signal receiving end, a signal sending end, and a signal control end. The data signal V D The compensation signal V0 is sent from the signal sending end, and the control signal V C The compensation adjustment circuit 230 is controlled through the signal control end.

[0058] The input ends of the first transistor T1, the second transistor T2, and the sixth transistor T6 are electrically connected to the signal receiving end to receive the data signal V D The control ends of the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 are electrically connected to the signal control end to receive the control signal V C The output ends of the second transistor T2 and the third transistor T3 are electrically connected to the signal sending end.

[0059] The output end of the first transistor T1 is electrically connected to one end of the analog inductor 231. The other end of the analog inductor 231 is electrically connected to a first end of the compensation resistor 232. A second end of the compensation resistor 232 is electrically connected to the input end of the third transistor T3. The second end of the compensation resistor 232 is also electrically connected to one end of the compensation capacitor 233. The other end of the compensation capacitor 233 is electrically connected to the input end of the fifth transistor T5. The output end of the fifth transistor T5 is electrically connected to a ground end. The ground end can be a common electrode in the display panel 30. The input end of the fourth transistor T4 is electrically connected to the output end of the sixth transistor T6. The output end of the fourth transistor T4 is electrically connected to the first end of the compensation resistor 232. The output end of the sixth transistor T6 is also electrically connected to the input end of the fifth transistor T5.

[0060] As shown in Figure 5 In some embodiments, the analog inductor 231 includes an equivalent resistor 234 and an equivalent transistor 235, an input end of the equivalent transistor 235 is electrically connected with an output end of the first transistor T1, an output end of the equivalent transistor 235 is electrically connected with a first end of the compensation resistor 232, one end of the equivalent resistor 234 is electrically connected with the input end of the equivalent transistor 235, and the other end of the equivalent resistor 234 is electrically connected with a control end of the equivalent transistor 235; the equivalent resistor 234 and the equivalent transistor 235 satisfy the condition: Wherein, R L represents a resistance value of the equivalent resistor 234, Cgs represents a gate-source parasitic capacitance of the equivalent transistor 235, and gm represents a transconductance of the equivalent transistor 235.

[0061] By combining the equivalent resistor 234 and the equivalent transistor 235 to replace the analog inductor 231, the inductance value of the analog inductor 231 can be adjusted by adjusting the equivalent resistor 234 or the equivalent transistor 235, so as to adjust the compensation effect of the compensation adjusting circuit 230, so as to realize targeted compensation according to different impedances of the repair lines in the display panel 30; and compared with directly adjusting the inductance, adjusting the equivalent resistor 234 or the equivalent transistor 235 is more accurate and has higher precision, and the equivalent resistor 234 and the equivalent transistor 235 can be adjusted, so the selectivity is higher.

[0062] Of course, in other embodiments, the analog inductor 231 can also be an inductor device, or can also be a combination of other devices.

[0063] As shown in Figure 6 In the embodiments of the present application, the signal control end is configured to receive a first control signal V C1 at a compensation time t0, and receive a second control signal V C2 at a normal time, the first control signal V C1 is configured to control the first transistor T1, the third transistor T3 and the fifth transistor T5 to be turned on, and simultaneously control the second transistor T2, the fourth transistor T4 and the sixth transistor T6 to be turned off. The second control signal V C2 is configured to control the second transistor T2, the fourth transistor T4 and the sixth transistor T6 to be turned on; and simultaneously control the first transistor T1, the third transistor T3 and the fifth transistor T5 to be turned off. The compensation time and the normal time are located in a row of pixel scanning time.

[0064] When the first transistor T1, the third transistor T3 and the fifth transistor T5 are turned on, the data signal V D After the jump edge steepness compensation is completed by the series connection of the analog inductor 231, the compensation resistor 232 and the compensation capacitor 233, the compensation signal V0 is formed and output to the signal sending end through the third transistor T3.

[0065] When the second transistor T2, the fourth transistor T4 and the sixth transistor T6 are turned on, the data signal which has reached stability after the jump process is not passed through the series connection of the analog inductor 231, the compensation resistor 232 and the compensation capacitor 233, but is directly output to the signal sending end through the second transistor T2. At the same time, under the condition that the fifth transistor T5 isolates the ground end, the voltage between the compensation capacitor 233 and the analog inductor 231 is reset to the data signal V D , which is to release the energy and charge inside the compensation capacitor 233 and the analog inductor 231 to the signal receiving end, and reset the initial state to the data signal V D , and then wait for the arrival of the data signal of the next line scanning.

[0066] Moreover, the compensation time t0 satisfies the condition: Wherein, L represents the inductance value of the analog inductor 231, C represents the capacitance value of the compensation capacitor 233, and R0 represents the resistance value of the compensation resistor 232.

[0067] In the embodiment of the present application, the damping coefficient of the circuit formed by the series connection of the analog inductor 231, the compensation resistor 232 and the compensation capacitor 233 is The circuit enters the under-damped state, and the capacitor voltage does an oscillation process with gradually decaying amplitude near the voltage value of the data signal V D . D The oscillation amplitude does not exceed the difference between the voltage V D of the previous line data signal and the current line data voltage V C1 .

[0068] Figure 6 The waveform at the top is the waveform of the under-damped oscillation of the series connection circuit of the analog inductor 231, the compensation resistor 232 and the compensation capacitor 233, Figure 6 The waveform in the middle is the waveform of the compensation signal V0 in the scanning time of one line of pixels, Figure 6 The waveform at the bottom is the comprehensive waveform of the first control signal V C1 and the second control signal V C2 when the first control signal V HThe left half peak or rising edge of the first wave crest of the oscillation can be used. The essence of the underdamped oscillation of the series circuit of the simulated inductor 231, the compensation resistor 232 and the compensation capacitor 233 is that the energy is continuously stored and released between the simulated inductor 231 and the compensation capacitor 233 of the reactive energy storage element, and is converted into heat energy dissipation when passing through the compensation resistor 232. In order to avoid the oscillation process after the first wave crest affecting the compensation effect, the second control signal V is set C2 The first transistor T1, the third transistor T3 and the fifth transistor T5 are controlled to be disconnected so that the oscillation of the compensation signal V0 is cut off before the first peak, that is, before the compensation time t0. C Control the compensation adjustment circuit 230 so that the subsequent signal does not pass through the underdamped oscillation circuit of the analog inductor 231, the compensation resistor 232 and the compensation capacitor 233 in series, and at the same time, the energy circulating inside the series circuit of the analog inductor 231, the compensation resistor 232 and the compensation capacitor 233 is forced to reset the initial state to the current data signal V D voltage to prepare for the compensation of the data signal when scanning the next row of pixels.

[0069] Since the resonant angular frequency in the waveform Oscillation angular frequency and ω can be calculated by the parameters of R0, L and C, and then the time of one oscillation peak can be calculated. At this time, half of the oscillation cycle Also called limit compensation time, if the compensation time t0 exceeds t L , the voltage will decrease when the waveform enters the falling area, and the compensation effect will become worse, so that more compensation time will bring worse effect. L , at this time the waveform shows an upward trend and the compensation effect is better.

[0070] like Figure 7 As shown, by comparison, it can be found that if the data line 100 is not broken, the data signal does not need to pass through the repair line, and the signal V when the data signal reaches the position corresponding to the breakpoint C 01 Since it is not affected by the repair line load, the signal V 01 The voltage waveform rises faster in the transition phase. If the data line 100 is broken and only a longer repair wire is used for welding repair without the compensation adjustment circuit 230 for signal compensation, the signal V 02 The voltage waveform rises slowly during the transition phase. When the compensation adjustment circuit 230 is used for compensation, the data signal is compensated by the compensation adjustment circuit 230, and the signal V output from the compensation adjustment circuit 230 is03 The voltage waveform of the signal increases significantly during the transition phase and exceeds the signal V 01 The rising degree of the voltage waveform in the transition phase; and due to the impedance of the second repair line 220 and part of the data line 100, the signal V when it reaches the breakpoint C after compensation 04 The voltage waveform decreases during the transition phase, and the signal V 04 The overall voltage waveform approaches the signal V 01 The overall voltage waveform of the data signal passing through the repaired data line 100 is similar to the voltage waveform passing through the normal data line 100, and the compensation effect is better.

[0071] In some embodiments, the further away the breakpoint of the broken data line 100 is from the first repair line 210, the shorter the compensation time. This sentence can also be expressed as the closer the breakpoint of the broken data line 100 is to the first repair line 210, the longer the compensation time. Since the data transmission direction after passing through the repair line to the breakpoint of the data line 100 is opposite to the data transmission direction of the normal data line 100 next to it, the length trend of the line reaching the same pixel point is opposite. Figure 1 As shown, for a normal data line 100, the line load through which the data signal passes increases from point C3 to point C2, and the pixel charging condition deteriorates. However, for a data line 100 using the repair solution, the line load through which the data signal passes decreases from point C3 to point C2, because the data signal is transmitted from point C2 to point C3, and the pixel charging condition improves. Therefore, when the repaired data line 100 and the surrounding normal data lines 100 need to display the same data image, the different pixel charging conditions will cause differences in brightness during display.

[0072] Based on the above problems, the embodiment of the present application performs targeted compensation according to the specific location of the break point of the data line 100. The farther the break point of the data line 100 is from the first repair line 210, the corresponding Figure 1 In the upward direction, since the line load through which the data signal passes is reduced, the charging condition of the pixel is improved, so the compensation time can be reduced, so that when the normal data line 100 and the repaired data line 100 need to display the same data picture, there will be no difference in brightness when displaying, thereby improving the display effect.

[0073] like Figure 8 As shown, a line break repair method provided as a second embodiment of the present application is used to repair a broken data line in the above-mentioned display panel. The line break repair method includes the following steps:

[0074] S1: Identify the disconnected data line;

[0075] S2: Welding the broken data line and the first repair line at the corresponding first repair point;

[0076] S3: Welding the broken data line and the second repair line at the corresponding second repair point;

[0077] S4: controlling the compensation adjustment circuit to compensate for the transition edge voltage of the data signal passing through the first repair line.

[0078] like Figure 9 As shown, in some embodiments, step S1 further includes:

[0079] S11: Identify the breakpoint position in the broken data line;

[0080] S12: Obtain the compensation time corresponding to the breakpoint position by looking up a table.

[0081] Meanwhile, the step S4 includes S41 : controlling the compensation adjustment circuit to compensate for the transition edge voltage of the data signal passing through the first repair line within the compensation time.

[0082] When the repaired data line and the surrounding normal data lines need to display the same data screen, the different pixel charging conditions will cause differences in brightness and darkness during display. By setting a compensation schedule, the compensation schedule records the correspondence between the data line breakpoint position (for example, the breakpoint can be located in a certain part of the scan line area in the display panel) and the compensation time. Through this design, according to the breakpoint position in the data line, the compensation time can be adjusted by software controlling the time of the first control signal, so that the farther the breakpoint of the data line is from the first repair line, the shorter the compensation time. As shown in the table below, taking a display panel with a resolution of FHD 1920*1080 as an example, the display panel has 1080 rows of scan lines, and the charging time t for each row of pixels is H =3us, limit compensation time t L =0.5us, and taking the case where the farther the breakpoint of the data line is from the first repair line, the smaller the number of scan lines is as an example, if the breakpoint of the data line is between 0-180 scan lines, the compensation time is 0.2us; if the breakpoint of the data line is between 181-360 scan lines, the compensation time is 0.25us; and so on, targeted compensation is achieved, so that the repaired data line and the normal data line have the same waveform delay effect at the same position, thereby reducing the brightness difference and improving the repair effect.

[0083]

[0084] Compensation Schedule

[0085] like Figure 10As shown, the display device provided in the third embodiment of the present application includes a driving circuit 20 and the display panel 30 as described above, and the driving circuit 20 is used to drive the display panel 30.

[0086] The driving circuit 20 includes a source driving circuit 21, a gate driving circuit and a controller 22, the source driving circuit 21 is connected with the data line 100 to provide data signals for the data line 100; the gate driving circuit is connected with the scan line to provide scan signals for the scan line; and the controller 22 is used to be electrically connected with the signal control end of the compensation adjusting circuit 230 to provide the first control signal or the second control signal for the compensation adjusting circuit 230, so as to control the compensation time of the compensation adjusting circuit 230.

[0087] The display panel 30 can include a plurality of data line repairing units 200, and the driving circuit 20 can include a plurality of source driving circuits 21, and the data line repairing unit 200 corresponds to the source driving circuit 21 one by one, and each data line repairing unit 200 is used to repair the data line 100 connected with each source driving circuit 21. Meanwhile, the driving circuit 20 can also include a plurality of controllers 22, and each controller 22 controls a corresponding data line repairing unit 200 individually; of course, only one controller 22 can be arranged to control all the data line repairing units 200. The controller 22 can be integrated on the corresponding source driving circuit 230, or can be integrated in other positions, which is not limited here.

[0088] As shown in the third embodiment of the present application, Figure 11 The driving circuit 20 further includes a register 23, and the register 23 is provided with a compensation time table, and the register 23 is connected with the controller 22, and the controller 22 controls the compensation time of the corresponding compensation adjusting circuit 230 according to the compensation time table in the register 23 and the breakpoint position of the data line 100.

[0089] It should be noted that the limitations of the steps involved in the present scheme do not affect the implementation of the specific scheme, and are not considered as limiting the order of the steps. The steps written in the front can be executed first, or can be executed later, or even can be executed simultaneously. The schemes of different embodiments can be combined and applied without conflict, as long as the present scheme can be implemented, it should be considered as belonging to the protection scope of the present application.

[0090] The above content is a further detailed description of the present application in combination with specific optional embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. A display panel comprising a plurality of data lines arranged in parallel, characterized in that: The display panel further includes at least one data line repair unit, and the data line repair unit includes: a first repair line, located at one end of the plurality of data lines receiving data signals, and arranged to cross the plurality of data lines in a different layer, wherein the intersections of the first repair line and the plurality of data lines form a plurality of first repair points; a second repair line, located at one end of the plurality of data lines away from the first repair line, and intersecting the plurality of data lines in a different layer, wherein the intersections of the second repair line and the plurality of data lines form a plurality of second repair points, and the second repair points correspond one-to-one to the first repair points; and A compensation adjustment circuit, wherein the signal receiving end of the compensation adjustment circuit is connected to the first repair line, and the signal sending end of the compensation adjustment circuit is connected to the second repair line; when the data line is broken, the first repair line and the broken data line are welded at the corresponding first repair point, and the second repair line and the broken data line are welded at the corresponding second repair point, the compensation adjustment circuit is used to compensate for the transition edge voltage of the data signal passing through the first repair line.

2. The display panel according to claim 1, wherein The compensation adjustment circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, an analog inductor, a compensation resistor, and a compensation capacitor, wherein the first transistor, the third transistor, and the fifth transistor are first-type transistors, and the second transistor, the fourth transistor, and the sixth transistor are second-type transistors; The compensation adjustment circuit includes a signal receiving end, a signal transmitting end, and a signal regulating end, wherein the input ends of the first transistor, the second transistor, and the sixth transistor are all electrically connected to the signal receiving end, the control ends of the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all electrically connected to the signal regulating end, and the output ends of the second transistor and the third transistor are all electrically connected to the signal transmitting end; The output end of the first transistor is electrically connected to one end of the simulated inductor, the other end of the simulated inductor is electrically connected to the first end of the compensation resistor, the second end of the compensation resistor is electrically connected to the input end of the third transistor, the second end of the compensation resistor is also electrically connected to one end of the compensation capacitor, the other end of the compensation capacitor is electrically connected to the input end of the fifth transistor, the output end of the fifth transistor is electrically connected to the ground end, the input end of the fourth transistor is electrically connected to the output end of the sixth transistor, the output end of the fourth transistor is electrically connected to the first end of the compensation resistor, and the output end of the sixth transistor is also electrically connected to the input end of the fifth transistor.

3. The display panel according to claim 2, wherein: The signal control terminal is used to receive a first control signal during the compensation time t0 and a second control signal during the normal time, wherein the first control signal is used to control the first transistor, the third transistor, and the fifth transistor to be turned on, and the second control signal is used to control the second transistor, the fourth transistor, and the sixth transistor to be turned on; The compensation time t0 satisfies the following conditions: Wherein, L represents the inductance value of the simulated inductor, C represents the capacitance value of the compensation capacitor, and R0 represents the resistance value of the compensation resistor; The compensation time and the normal time are within a row of pixel scanning time.

4. The display panel according to claim 3, wherein: The simulated inductor includes an equivalent resistor and an equivalent transistor, wherein the input terminal of the equivalent transistor is electrically connected to the output terminal of the first transistor, the output terminal of the equivalent transistor is electrically connected to the first terminal of the compensation resistor, one end of the equivalent resistor is electrically connected to the input terminal of the equivalent transistor, and the other end of the equivalent resistor is electrically connected to the control terminal of the equivalent transistor; The equivalent resistor and the equivalent transistor meet the following conditions: Among them, R L It represents the resistance value of the equivalent resistor, Cgs represents the gate-source parasitic capacitance of the equivalent transistor, and gm represents the transconductance of the equivalent transistor.

5. The display panel according to claim 3, wherein: The farther the breakpoint of the broken data line is from the first repair line, the shorter the compensation time is.

6. The display panel according to claim 1, wherein: The display panel includes pixel switches arranged in an array and used to control pixels, and the compensation adjustment circuit is arranged in the same layer as the pixel switches.

7. The display panel according to claim 1, wherein: The display panel includes a plurality of data line repair units, which are arranged in parallel along a direction perpendicular to the data lines, and the compensation adjustment circuit in at least one of the data line repair units is located in the display area of ​​the display panel.

8. A method for repairing a broken line, used for the display panel according to any one of claims 1 to 7, characterized in that: The disconnection repair method comprises the steps of: Identify broken data lines; Welding the broken data line and the first repair line at the corresponding first repair point; Welding the broken data line and the second repair line at the corresponding second repair point; and The compensation adjustment circuit is controlled to compensate for a transition edge voltage of a data signal passing through the first repair line.

9. The method for repairing a broken line according to claim 8, wherein: The step of identifying a broken data line includes: Identify the location of data line breakpoints; and Obtaining the compensation time corresponding to the breakpoint position by looking up a table; The step of controlling the compensation adjustment circuit to compensate for the transition edge voltage of the data signal passing through the first repair line includes: controlling the compensation adjustment circuit to compensate for the transition edge voltage of the data signal passing through the first repair line within the compensation time.

10. A display device, characterized in that: The display panel comprises a driving circuit and the display panel according to any one of claims 1 to 7, wherein the driving circuit is used to drive the display panel.

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