Driving circuit, driving chip, driving system and display screen

Abstract

The utility model is suitable for the technical field of display screens, and provides a driving circuit, a driving chip, a driving system and a display screen. The driving circuit comprises n row tube channels, each row tube channel comprises a clamping module, a switch module and a row tube, the first end of each switch module is electrically connected with a voltage stabilizing end, the control end of each switch module is electrically connected with the first end of an external control module, and the control end of each clamping module is electrically connected with the second end of the control module. The control end of the row tube is electrically connected with the third end of the control module, the output end of the clamping module is electrically connected with the second end of the switch module and the output end of the row tube, and n is a natural number larger than or equal to 1; when the row tube is closed according to a first control signal output by the control module, the switch module is connected according to a second control signal output by the control module, so that the voltage stabilizing end is connected with the output end of the row tube, and the clamping module clamps the voltage of the output end of the row tube to a clamping voltage according to a third control signal output by the control module.

Description

Technical Field

[0001] The present application belongs to the technical field of display screens, and in particular, relates to a driving circuit, a driving chip, a driving system and a display screen. Background Art

[0002] With the rapid development of small-pitch LED displays, their application scope and display performance have been significantly improved. However, in the manufacturing and operation of LED displays, coupling is difficult to avoid. In order to ensure the stability of the display, how to reduce the coupling phenomenon is an urgent problem to be solved. Utility Model Content

[0003] The embodiments of the present application provide a driving circuit, a driving chip, a driving system and a display screen, which can reduce the coupling phenomenon in an LED display screen.

[0004] In a first aspect, an embodiment of the present application provides a driving circuit, comprising n row tube channels, each of the row tube channels comprising a clamping module, a switch module and a row tube, a first end of the switch module being electrically connected to a voltage stabilizing end, a control end of the switch module being electrically connected to a first end of an external control module, a control end of the clamping module being electrically connected to a second end of the control module, a control end of the row tube being electrically connected to a third end of the control module, an output end of the clamping module being electrically connected to a second end of the switch module and an output end of the row tube, wherein n is a natural number greater than or equal to 1;

[0005] When the row tube is turned off according to the first control signal output by the control module, the switch module is turned on according to the second control signal output by the control module, so that the voltage regulating end is connected to the output end of the row tube, and the clamping module clamps the voltage of the output end of the row tube to the clamping voltage according to the third control signal output by the control module.

[0006] In the first embodiment, the voltage stabilizing end is a voltage end of a voltage stabilizing circuit, and the first end of each switch module in the n row tube channels is electrically connected to the voltage end of the voltage stabilizing circuit.

[0007] In a second embodiment, each of the row pipe channels further includes a first voltage stabilizing unit, a first end of the first voltage stabilizing unit is the voltage stabilizing end, and a second end of the first voltage stabilizing unit is grounded.

[0008] In a possible implementation manner of the second embodiment, the first voltage stabilizing unit includes a first voltage stabilizing capacitor, a first end of the first voltage stabilizing capacitor is the voltage stabilizing end, and a second end of the first voltage stabilizing capacitor is a second end of the first voltage stabilizing unit.

[0009] In a possible implementation of the first aspect, the clamping module includes a first operational amplifier, a positive input terminal of the first operational amplifier is used to receive a reference voltage, a control terminal of the first operational amplifier is electrically connected to the corresponding second terminal of the control module, and a negative input terminal of the first operational amplifier is electrically connected to the output terminal of the first operational amplifier, the second terminal of the switch module and the output terminal of the row tube, respectively.

[0010] In a second aspect, an embodiment of the present application provides a driving circuit, which includes the driving circuit described in the first embodiment, and further includes a second voltage stabilizing unit, a first end of the second voltage stabilizing unit is electrically connected to the voltage end of the voltage stabilizing circuit, and a second end of the second voltage stabilizing unit is grounded.

[0011] In a possible implementation manner of the second aspect, the second voltage stabilizing unit includes a second voltage stabilizing capacitor, a first end of the second voltage stabilizing capacitor is electrically connected to a voltage end of the voltage stabilizing circuit, and a second end of the second voltage stabilizing capacitor is grounded.

[0012] In a third aspect, an embodiment of the present application provides a driver chip, comprising the driver circuit described in any one of the first aspect and the driver circuit described in any one of the second aspect.

[0013] In a fourth aspect, an embodiment of the present application provides a driving system, comprising the driving circuit described in any one of the first aspect and the driving circuit described in any one of the second aspect. When the driving system includes the driving circuit described in the second aspect, the n row tube channels in the driving circuit are arranged inside the driving chip, and the second voltage stabilizing unit in the driving circuit is arranged outside the driving chip.

[0014] In a fifth aspect, an embodiment of the present application provides a display screen, comprising the driving chip described in the third aspect or the driving system described in the fourth aspect.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0016] An embodiment of the present application provides a driving circuit, comprising n row tube channels, each row tube channel comprising a clamping module, a switch module and a row tube, the first end of the switch module is electrically connected to the voltage stabilizing end, the control end of the switch module is electrically connected to the first end of the external control module, the control end of the clamping module is electrically connected to the second end of the control module, the control end of the row tube is electrically connected to the third end of the control module, the output end of the clamping module is electrically connected to the second end of the switch module and the output end of the row tube, wherein n is a natural number greater than or equal to 1.

[0017] When the row tube is closed according to the first control signal output by the control module, it means that the row tube channel is in a non-display stage, then the switch module will be turned on according to the second control signal output by the control module, so that the voltage regulating end and the output end of the row tube are turned on, and at the same time, the clamping module will clamp the voltage of the output end of the row tube to the clamping voltage according to the third control signal output by the control module. In this way, when the row tube channel is in the non-display stage and there is crosstalk of the coupled signal at the output end of the row tube channel, the clamping voltage output by the clamping module can be used to eliminate the crosstalk of the coupled signal. The entire circuit structure is simple, and the coupling phenomenon between the row tube channels can be eliminated. After the coupling phenomenon is eliminated, the stability of the display image can be improved.

[0018] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 is a principle block diagram of a driving circuit provided in an embodiment of the present application;

[0021] Figure 2 is a principle block diagram of a driving circuit provided in another embodiment of the present application;

[0022] Figure 3 is a principle block diagram of a driving circuit provided in another embodiment of the present application;

[0023] Figure 4 is a circuit connection diagram of a driving circuit provided in an embodiment of the present application;

[0024] Figure 5 is a circuit connection diagram of a driving circuit provided in another embodiment of the present application;

[0025] Figure 6 is a circuit connection diagram of a driving circuit provided in another embodiment of the present application;

[0026] Figure 7 is a principle block diagram of a driving circuit provided in another embodiment of the present application;

[0027] Figure 8 It is a circuit connection diagram of a driving circuit provided in another embodiment of the present application.

[0028] In the figure: 10, row tube channel; 11, clamping module; 111, output unit; 12, switch module; 13, row tube; 14, first voltage stabilizing unit; 20, control module; 30, second voltage stabilizing unit. DETAILED DESCRIPTION

[0029] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0030] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0031] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0032] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0033] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0034] With the rapid development of small-pitch LED displays, internal coupling is inevitable. In order to ensure the stability of the display, it is crucial to reduce coupling.

[0035] In view of the above problems, the present application provides a driving circuit, such as Figure 1 As shown, the driving circuit includes n row tube channels, each row tube channel 10 includes a clamping module 11, a switch module 12 and a row tube 13, the first end of the switch module 12 is electrically connected to the voltage stabilizing end, the control end of the switch module 12 is electrically connected to the first end of the external control module 20, the control end of the clamping module 11 is electrically connected to the second end of the control module 20, the control end of the row tube 13 is electrically connected to the third end of the control module 20, and the output end of the clamping module 11 is electrically connected to the second end of the switch module 12 and the output end of the row tube 13, wherein n is a natural number greater than or equal to 1. It should be pointed out that the output end of the row tube 13 serves as the output end of the row tube channel 10. It should be noted that the control module 20 can be one control module 20 corresponding to each row tube channel 10, or multiple row tube channels 10 can share one control module 20, which is not specifically limited here.

[0036] Specifically, when the row tube 13 is turned on according to the first control signal output by the control module 20, the output end of the row tube channel 10 has current output, indicating that the row tube channel 10 is in the display stage. At this time, the switch module 12 is turned off according to the second control signal output by the control module 20, and the clamping module 11 stops outputting the clamping voltage to the output end of the row tube 13 according to the third control signal output by the control module 20. It can be seen that when the row tube channel 10 is in the display stage, the clamping module 11 is in a non-working state and will not affect the normal display of the row tube channel 10.

[0037] When the row tube 13 is turned off according to the first control signal output by the control module 20, there is no current output at the output end of the row tube channel 10, indicating that the row tube channel 10 is in a non-display stage. At this time, the switch module 12 is turned on according to the second control signal output by the control module 20, so that the voltage stabilizing end is turned on with the output end of the row tube 13, and at the same time, the clamping module 11 outputs a clamping voltage to the output end of the row tube 13 according to the third control signal output by the control module 20, and clamps the voltage at the output end of the row tube 13 to the clamping voltage. In this way, when the row tube channel 10 is in a non-display stage and there is crosstalk of a coupled signal at the output end of the row tube channel 10, the clamping voltage output by the clamping module 11 can be used to eliminate the crosstalk of the coupled signal. The entire circuit structure is simple, and the coupling phenomenon between the row tube channels 10 can be eliminated. After the coupling phenomenon is eliminated, the stability of the display image can be improved.

[0038] It can be seen from the above that the driving circuit provided in the embodiment of the present application can eliminate the coupling phenomenon inside the LED display screen. After the coupling phenomenon is eliminated, the stability of the display image of the LED display screen can be improved. Specific embodiment 1

[0040] like Figure 2 As shown, the voltage stabilizing end VLDO is the voltage end of the voltage stabilizing circuit LDO, and the first end of each switch module 12 in the n row pipe channels 10 is electrically connected to the voltage end of the voltage stabilizing circuit.

[0041] Specifically, assuming Figure 2 The first row pipe channel 10 in the display stage, the row pipe 13 in the first row pipe channel 10 is turned on according to the first control signal output by the control module 20, so that the output end of the first row pipe channel 10 outputs current. The switch module 12 in the first row pipe channel 10 is turned off according to the second control signal output by the control module 20, so that the output end of the first row pipe channel 10 is disconnected from the voltage regulator end VLDO. The clamping module 11 in the first row pipe channel 10 stops outputting the clamping voltage to the output end of the row pipe 13 according to the third control signal output by the control module 20, that is, it is in a non-working state.

[0042] Assuming that the 2-n row tube channels 10 are all in the non-display stage, the row tubes 13 in the 2-n row tube channels 10 are turned off according to the first control signal output by the control module 20, and then there is no current output at the output ends of the 2-n row tube channels 10. The switch module 12 in the 2-n row tube channels 10 is turned on according to the second control signal output by the control module 20, so that the output ends of the 2-n row tube channels 10 are all turned on with the voltage stabilizing end VLDO, that is, the output ends of the 2-n row tube channels 10 are all connected to the voltage stabilizing end VLDO. At this time, the clamping module 11 in the 2-n row tube channels 10 starts to work according to the third control signal output by the control module 20 and outputs the clamping voltage. When there are a output ends of the 2-nth row tube channels 10 with coupled signal crosstalk, where 1≤a≤n-1, n-1 clamping modules 11 work simultaneously and act on the a output ends with coupled signal crosstalk, thereby enhancing the clamping effect of the a output ends, thereby reducing the coupled crosstalk between the row tube channels 10.

[0043] In this embodiment, 1-n row pipe channels 10 are connected together through the voltage regulator terminal VLDO. Assuming that 1-n row pipe channels 10 are all in a non-display stage, and one or more output terminals of the 1-n row pipe channels 10 have coupled signal crosstalk, then n clamping modules 11 will work simultaneously and act on the output terminals with coupled signal crosstalk, thereby realizing a change from one clamping module 11 clamping one output terminal to multiple clamping modules 11 clamping multiple output terminals at the same time, thereby greatly reducing the coupled crosstalk between the row pipe channels 10. Specific embodiment 2

[0045] like Figure 3 As shown, each row pipe channel 10 further includes a first voltage stabilizing unit 14, a first end of the first voltage stabilizing unit 14 is a voltage stabilizing end, and a second end of the first voltage stabilizing unit 14 is grounded. Figure 3 It can be known that the first end of each switch module 12 in the n row tube channels 10 is electrically connected to a voltage stabilizing end.

[0046] Specifically, when the output end of the row tube channel 10 needs current output, the row tube channel 10 enters the display stage, the row tube 13 in the row tube channel 10 is turned on according to the first control signal output by the control module 20, and the switch module 12 in the row tube channel 10 is turned off according to the second control signal output by the control module 20, so that the output end of the row tube channel 10 is disconnected from the voltage stabilizing end, and the clamping module 11 in the row tube channel 10 stops working according to the third control signal output by the control module 20. When the conduction time of the row tube 13 is reached, the row tube channel 10 enters the non-display stage, the row tube 13 in the row tube channel 10 is turned off according to the first control signal output by the control module 20, and the switch module 12 in the row tube channel 10 is turned on according to the second control signal output by the control module 20, so that the output end of the row tube channel 10 is connected to the voltage stabilizing end, and the clamping module 11 in the row tube channel 10 starts to work and outputs a clamping voltage according to the third control signal output by the control module 20 to charge the first voltage stabilizing unit 14. Finally, the clamping ability of the clamping module 11 and the voltage stabilizing ability of the first voltage stabilizing unit 14 are used to stabilize the voltage at the output end of the row tube channel 10 at the clamping voltage, so that the coupling crosstalk between the row tube channels 10 can be reduced.

[0047] like Figure 4 As shown, the first voltage stabilizing unit 14 includes a first voltage stabilizing capacitor C1 , a first end of the first voltage stabilizing capacitor C1 is a voltage stabilizing end, and a second end of the first voltage stabilizing capacitor C1 is a second end of the first voltage stabilizing unit 14 .

[0048] Specifically, when Figure 4 When the driving circuit shown is packaged into a driving chip, the first voltage stabilizing capacitor C1 is set inside the driving chip. When reducing the coupling crosstalk, the first voltage stabilizing capacitor C1 is charged, and the voltage on the first voltage stabilizing capacitor C1 is stabilized at the clamping voltage, and finally the voltage at the output end of the row pipe channel 10 is stabilized at the clamping voltage by using the clamping capability of the clamping module 11 and the voltage stabilizing capability of the first voltage stabilizing capacitor C1, so that the coupling crosstalk between the row pipe channels 10 can be reduced.

[0049] like Figure 4As shown, the clamp module 11 includes a first operational amplifier OP1, the positive input terminal of the first operational amplifier OP1 is used to receive the reference voltage VREF, the control terminal of the first operational amplifier OP1 is electrically connected to the second terminal of the control module 20, and the negative input terminal of the first operational amplifier OP1 is electrically connected to the output terminal of the first operational amplifier OP1, the second terminal of the switch module 12, and the output terminal of the row tube 13. Among them, the output terminal of the first operational amplifier OP1 serves as the output terminal of the clamp module 11, and the control terminal of the first operational amplifier OP1 serves as the control terminal of the clamp module 11.

[0050] Specifically, the present application uses an operational amplifier to form a voltage follower, so that the voltage output by the clamping module 11 follows the change of the reference voltage VREF, that is, the clamping voltage is the reference voltage VREF.

[0051] like Figure 5 As shown, the clamp module 11 includes a second operational amplifier OP2 and an output unit 111, the negative input terminal of the second operational amplifier OP2 is used to receive the reference voltage VREF, the positive input terminal of the second operational amplifier OP2 is electrically connected to the output terminal of the output unit 111, the second terminal of the switch module 12 and the output terminal of the row tube 13 respectively, the output terminal of the second operational amplifier OP2 is electrically connected to the control terminal of the output unit 111, and the control terminal of the second operational amplifier OP2 is electrically connected to the second terminal of the control module 20. Among them, the control terminal of the second operational amplifier OP2 serves as the control terminal of the clamp module 11, and the output terminal of the output unit 111 serves as the output terminal of the clamp module 11.

[0052] Specifically, the operational amplifier and the output unit of the present application form a feedback loop, and finally output a clamping voltage after the feedback loop reaches a balance.

[0053] like Figure 5 As shown, the output unit 111 includes a first field effect transistor M1, the gate of the first field effect transistor M1 is electrically connected to the output end of the second operational amplifier OP2, the drain of the first field effect transistor M1 is electrically connected to the positive input end of the second operational amplifier OP2, the second end of the switch module 12 and the output end of the row tube 13, and the source of the first field effect transistor M1 is electrically connected to the power supply VCC. The first field effect transistor M1 is a PMOS tube.

[0054] like Figure 6As shown, the clamp module 11 includes a third operational amplifier OP3 and an output unit 111, the negative input terminal of the third operational amplifier OP3 is used to receive a reference voltage VREF, the positive input terminal of the third operational amplifier OP3 is electrically connected to the output terminal of the output unit 111, the second terminal of the switch module 12 and the output terminal of the row tube 13 respectively, and the output terminal of the third operational amplifier OP3 is electrically connected to the control terminal of the output unit 111. The control terminal of the third operational amplifier OP3 is electrically connected to the second terminal of the control module 20. Among them, the control terminal of the third operational amplifier OP3 serves as the control terminal of the clamp module 11, and the output terminal of the output unit 111 serves as the output terminal of the clamp module 11.

[0055] like Figure 6 As shown, the output unit 111 includes a first field effect transistor M1, the gate of the first field effect transistor M1 is electrically connected to the output end of the third operational amplifier OP3, the drain of the first field effect transistor M1 is electrically connected to the positive input end of the third operational amplifier OP3, the second end of the switch module 12 and the output end of the row tube 13, and the source of the first field effect transistor M1 is grounded. The first field effect transistor M1 is an NMOS tube.

[0056] As can be seen from the above, the clamping module 11 can be a voltage follower, specifically Figure 4 As shown; the clamping module 11 can also be a buffer 1 composed of an operational amplifier and a PMOS tube, as shown in FIG. Figure 5 As shown; the clamping module 11 can also be a buffer 2 composed of an operational amplifier and an NMOS tube, as shown in FIG. Figure 6 It should be noted that the clamping module 11 can also be a structure in which buffer 1 and buffer 2 exist simultaneously.

[0057] Exemplarily, the switch module 12 includes a second field effect transistor M2, and the second field effect transistor M2 is a PMOS transistor or an NMOS transistor. When the second field effect transistor M2 is a PMOS transistor, Figure 4 As shown, the drain of the second field effect transistor M2 is electrically connected to the voltage stabilizing terminal, the gate of the second field effect transistor M2 is electrically connected to the first terminal of the control module 20, and the source of the second field effect transistor M2 is electrically connected to the output terminal of the row tube 13 and the output terminal of the clamping module 11. When the second field effect transistor M2 is an NMOS tube, as shown in FIG. Figure 6 As shown, the source of the second field effect transistor M2 is electrically connected to the voltage stabilizing end, the gate of the second field effect transistor M2 is electrically connected to the first end of the control module 20, and the drain of the second field effect transistor M2 is electrically connected to the output end of the row tube 13 and the output end of the clamping module 11 respectively.

[0058] Specifically, when the row tube channel 10 is in the display stage, the control module 20 outputs a second control signal to the gate of the second field effect tube M2, so that the second field effect tube M2 is turned off according to the second control signal. When the row tube channel 10 is in the non-display stage, the second field effect tube M2 is turned on according to the second control signal.

[0059] Exemplarily, the switch module 12 includes a transmission gate TG, such as Figure 5 As shown, the input end of the transmission gate TG is electrically connected to the voltage stabilizing end, the control end of the transmission gate TG is electrically connected to the first end of the control module 20, and the output end of the transmission gate TG is electrically connected to the output end of the row tube 13 and the output end of the clamping module 11 respectively.

[0060] Specifically, when the row pipe channel 10 is in the display stage, the control module 20 outputs a second control signal to the control end of the transmission gate TG, so that the control end of the transmission gate TG is closed according to the second control signal. When the row pipe channel 10 is in the non-display stage, the control end of the transmission gate TG is turned on according to the second control signal.

[0061] Exemplarily, the row transistor 13 includes an output field effect transistor M0, which is an NMOS transistor or a PMOS transistor. When the output field effect transistor M0 is an NMOS transistor, the switch module 12 uses a PMOS transistor (for a specific structure, see Figure 4 ) or transmission gate TG (for specific structure, see Figure 5 ), the clamp module 11 adopts Figure 4 or Figure 5 When the output field effect transistor M0 is an NMOS transistor, Figure 4 or Figure 5 As shown, the gate of the output field effect transistor M0 is electrically connected to the third end of the control module 20, the source of the output field effect transistor M0 is grounded, and the drain of the output field effect transistor M0 is electrically connected to the second end of the switch module 12 and the output end of the clamp module 11 respectively.

[0062] When the output field effect transistor M0 is a PMOS transistor, the switch module 12 uses an NMOS transistor (for specific structure, see Figure 6 ) or transmission gate TG, the clamp module 11 adopts Figure 4 or Figure 6 When the output field effect transistor M0 is a PMOS transistor, as shown in Figure 6 As shown, the gate of the output field effect transistor M0 is electrically connected to the third end of the control module 20, the source of the output field effect transistor M0 is electrically connected to the power supply VCC, and the drain of the output field effect transistor M0 is electrically connected to the second end of the switch module 12 and the output end of the clamp module 11 respectively.

[0063] Specifically, when the row tube channel 10 is in the display stage, the control module 20 outputs the first control signal to the gate of the output field effect tube M0, so that the output field effect tube M0 is turned on according to the first control signal, and the output end of the row tube channel 10 has current output. When the row tube channel 10 is in the non-display stage, the output field effect tube M0 is turned off according to the first control signal, and the output end of the row tube channel 10 has no current output. Specific embodiment three

[0065] like Figure 7 As shown, the driving circuit further includes a second voltage stabilizing unit 30, a first end of the second voltage stabilizing unit 30 is electrically connected to the voltage end of the voltage stabilizing circuit, and a second end of the second voltage stabilizing unit 30 is grounded.

[0066] Specifically, assuming Figure 7 When the first row pipe channel 10 is in the display stage, the row pipe 13 in the first row pipe channel 10 is turned on according to the first control signal output by the control module 20, so that the output end of the first row pipe channel 10 outputs current. The switch module 12 in the first row pipe channel 10 is turned off according to the second control signal output by the control module 20, so that the output end of the first row pipe channel 10 is disconnected from the voltage regulator end VLDO. The clamp module 11 in the first row pipe channel 10 stops outputting the clamp voltage to the output end of the row pipe 13 according to the third control signal output by the control module 20, that is, it is in a non-working state.

[0067] Assuming that the 2-n row tube channels 10 are all in the non-display stage, and the row tubes 13 in the 2-n row tube channels 10 are turned off according to the first control signal output by the control module 20, there is no current output at the output ends of the 2-n row tube channels 10. The switch module 12 in the 2-n row tube channels 10 is turned on according to the second control signal output by the control module 20, so that the output ends of the 2-n row tube channels 10 are all turned on with the voltage stabilizing end VLDO, that is, the output ends of the 2-n row tube channels 10 are all connected to the voltage stabilizing end VLDO. At this time, the clamping module 11 in the 2-n row tube channels 10 starts to work and outputs the clamping voltage according to the third control signal output by the control module 20, and the n-1 clamping modules 11 jointly charge the second voltage stabilizing unit 30, so that the voltage at the first end of the second voltage stabilizing unit 30 is charged to the clamping voltage in a short time. When the voltage of the first terminal of the second voltage stabilizing unit 30 is charged to the clamping voltage, the voltage stabilizing terminal is simultaneously connected to the output terminals of the 2nd to nth row pipe channels 10 , thereby reducing the coupling crosstalk between the row pipe channels 10 .

[0068] like Figure 8 As shown, the second voltage stabilizing unit 30 includes a second voltage stabilizing capacitor C2, a first end of the second voltage stabilizing capacitor C2 is electrically connected to the voltage end of the voltage stabilizing circuit, and a second end of the second voltage stabilizing capacitor C2 is grounded.

[0069] Specifically, when Figure 8 When the driving circuit in the embodiment is packaged into a driving chip, n row pipe channels 10 are arranged inside the driving chip, and the second voltage stabilizing capacitor C2 is arranged outside the driving chip, that is, other structures except the second voltage stabilizing capacitor C2 can be arranged on one chip, and the second voltage stabilizing capacitor C2 is connected to the corresponding pin PIN of the driving chip; in another embodiment, the second voltage stabilizing capacitor C2 can also be packaged inside the driving chip. When reducing the coupling crosstalk, multiple clamping modules 11 charge the second voltage stabilizing capacitor C2 at the same time, which will greatly shorten the charging time of the second voltage stabilizing capacitor C2, will not affect the establishment time of the clamping voltage, and finally stabilize the voltage at the output end of the row pipe channel 10 at the clamping voltage, so that the coupling crosstalk between the row pipe channels 10 can be reduced.

[0070] The embodiment of the present application also provides a driver chip, including the driver circuit described above. It should be noted that the first voltage stabilizing capacitor C1 is arranged inside the driver chip. When reducing the coupling crosstalk, the first voltage stabilizing capacitor C1 is charged, and the voltage on the first voltage stabilizing capacitor C1 is stabilized at the clamping voltage, and finally the voltage at the output end of the row pipe channel 10 is stabilized at the clamping voltage by utilizing the clamping capability of the clamping module 11 and the voltage stabilizing capability of the first voltage stabilizing capacitor C1, so that the coupling crosstalk between the row pipe channels 10 can be reduced.

[0071] The embodiment of the present application also provides a driving system, including the driving circuit described above. It should be noted that the driving system also includes a driving chip. Figure 7 or Figure 8 In the driving circuit shown, n row pipe channels in the driving circuit are arranged inside the driving chip, and the second voltage stabilizing unit in the driving circuit is arranged outside the driving chip. When reducing the coupling crosstalk, multiple clamping modules 11 charge the second voltage stabilizing capacitor C2 at the same time, which will greatly shorten the charging time of the second voltage stabilizing capacitor C2, will not affect the establishment time of the clamping voltage, and finally stabilize the voltage at the output end of the row pipe channel 10 at the clamping voltage, so that the coupling crosstalk between the row pipe channels 10 can be reduced.

[0072] The embodiment of the present application also provides a display screen, including the above-mentioned driver chip or the above-mentioned driver system. Since the display screen provided by the embodiment of the present application adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here; in addition, it should be noted that when the above-mentioned driver chip or driver system is applied to the display screen and connected to the display array of the display screen, the display array can be a common cathode display array or a common anode display array, which is not limited here, and the display screen can be an LED display screen, an OLED display screen, a mini LED display screen, a micro LED display screen, an LCD display screen, etc.

[0073] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A driving circuit, characterized in that: The invention comprises n row tube channels, each of which comprises a clamp module, a switch module and a row tube, a first end of the switch module is electrically connected to a voltage stabilizing end, a control end of the switch module is electrically connected to a first end of an external control module, a control end of the clamp module is electrically connected to a second end of the control module, a control end of the row tube is electrically connected to a third end of the control module, an output end of the clamp module is electrically connected to a second end of the switch module and an output end of the row tube, wherein n is a natural number greater than or equal to 1; When the row tube is turned off according to the first control signal output by the control module, the switch module is turned on according to the second control signal output by the control module, so that the voltage regulating end is connected to the output end of the row tube, and the clamping module clamps the voltage of the output end of the row tube to the clamping voltage according to the third control signal output by the control module.

2. The driving circuit according to claim 1, characterized in that: The voltage stabilizing end is a voltage end of a voltage stabilizing circuit, and the first end of each switch module in the n row tube channels is electrically connected to the voltage end of the voltage stabilizing circuit.

3. The driving circuit according to claim 1, characterized in that: Each of the row pipe channels further includes a first voltage stabilizing unit, a first end of the first voltage stabilizing unit is the voltage stabilizing end, and a second end of the first voltage stabilizing unit is grounded.

4. The driving circuit according to claim 3, characterized in that: The first voltage stabilizing unit includes a first voltage stabilizing capacitor, a first end of the first voltage stabilizing capacitor is the voltage stabilizing end, and a second end of the first voltage stabilizing capacitor is a second end of the first voltage stabilizing unit.

5. The driving circuit according to any one of claims 1 to 4, characterized in that: The clamping module includes a first operational amplifier, the positive input terminal of the first operational amplifier is used to receive a reference voltage, the control terminal of the first operational amplifier is electrically connected to the corresponding second terminal of the control module, and the negative input terminal of the first operational amplifier is electrically connected to the output terminal of the first operational amplifier, the second terminal of the switch module and the output terminal of the row tube respectively.

6. The driving circuit according to claim 2, characterized in that: The driving circuit further includes a second voltage stabilizing unit, a first end of the second voltage stabilizing unit is electrically connected to the voltage end of the voltage stabilizing circuit, and a second end of the second voltage stabilizing unit is grounded.

7. The driving circuit according to claim 6, characterized in that: The second voltage stabilizing unit includes a second voltage stabilizing capacitor, a first end of the second voltage stabilizing capacitor is electrically connected to the voltage end of the voltage stabilizing circuit, and a second end of the second voltage stabilizing capacitor is grounded.

8. A driver chip, characterized in that: The driving circuit comprises the driving circuit according to any one of claims 1 to 7.

9. A drive system, characterized in that: The driving circuit comprises the driving circuit as claimed in any one of claims 1 to 7, wherein when the driving system comprises the driving circuit as claimed in claim 6 or 7, the n row tube channels in the driving circuit are arranged inside the driving chip, and the second voltage stabilizing unit in the driving circuit is arranged outside the driving chip.

10. A display screen, characterized in that: Includes the driving chip described in claim 8 or the driving system described in claim 9.

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