Driving unit, driving chip and display device

Abstract

The embodiment of the utility model provides a driving unit, a driving chip and a display device, and relates to the technical field of display. The driving unit controls the load conduction speed through a driving module. The driving unit comprises a first driving module, a switch module and a logic control module; the first input end of the first driving module is electrically connected with a reference voltage end; the control end of the switch module is electrically connected with the output end of the first driving module, and the first end of the switch module is electrically connected with the second input end of the first driving module; the second end of the switch module is electrically connected with the power supply end; the third end of the switch module is electrically connected with a load; the first output end of the logic control module is electrically connected with the control end of the first driving module; the logic control module is configured to output an adjustment coefficient to the first driving module; the adjusting coefficient is used for adjusting the driving capability of the first driving module, and the driving capability of the first driving module is related to the switching-on or switching-off speed of the switch module.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a driving unit, a driving chip, and a display device. Background Technology

[0002] In LED display technology, many driver chips use pulse width modulation (PWM) to drive multiple LED groups. To improve the grayscale of LED displays, the PWM adjustment width needs to be more precisely controlled, thus the PWM adjustment frequency has been gradually increased.

[0003] In high-frequency displays, the switching speed of the channels affects the application of PWM in high-frequency regulation. Currently, driver chips typically use methods to increase the driving capability, such as operational amplifier SR modulation, to improve the channel turn-on speed. However, in practical applications, the requirements for channel turn-on speed vary at different current levels, and different lamps have different characteristics. Utility Model Content

[0004] This utility model provides a driving unit, a driving chip, and a display device. The driving unit controls the load conduction speed through a driving module.

[0005] In a first aspect, some embodiments of this application provide a driving unit, which includes: a first driving module, a switching module, and a logic control module; a first input terminal of the first driving module is electrically connected to a reference voltage terminal; a control terminal of the switching module is electrically connected to the output terminal of the first driving module, and a first terminal of the switching module is electrically connected to a second input terminal of the first driving module; a second terminal of the switching module is electrically connected to a power supply terminal; a third terminal of the switching module is electrically connected to a load; a first output terminal of the logic control module is electrically connected to the control terminal of the first driving module; the first driving module is configured to control the switching module to turn on or off; the logic control module is configured to output an adjustment coefficient to the first driving module; the adjustment coefficient is used to adjust the driving capability of the first driving module, and the driving capability of the first driving module is related to the speed at which the switching module turns on or off.

[0006] Based on the above solutions, some embodiments of this application provide a driving unit that generates different adjustment coefficients through a logic control module and transmits the adjustment coefficients to a first driving module. The first driving module receives the adjustment coefficients and controls its own driving capability, thereby controlling the on or off speed of the switching module. In this way, the conduction speed of the load can be adjusted, which can further enhance the user experience in practical applications.

[0007] In some embodiments, the first driving module includes: an operational amplifier; a first input terminal of the operational amplifier is a first input terminal of the first driving module, a second input terminal of the operational amplifier is a second input terminal of the first driving module, and an output terminal of the operational amplifier is an output terminal of the first driving module; the control terminal of the operational amplifier is electrically connected to the control terminal of the first driving module.

[0008] In some embodiments, the operational amplifier includes: a plurality of first transistors and a plurality of second transistors; the plurality of first transistors are connected in parallel, and the plurality of second transistors are connected in parallel; the control terminal of the operational amplifier includes: a first control terminal and a second control terminal; the control terminal of the first transistor is electrically connected to the first control terminal of the operational amplifier, a first terminal of the first transistor is electrically connected to a second terminal of the second transistor, and the second terminal of the first transistor is electrically connected to a ground terminal; the control terminal of the second transistor is electrically connected to the second control terminal of the operational amplifier, and a first terminal of the second transistor is electrically connected to a voltage terminal; the adjustment coefficient is within a first range, and the logic control module is configured to adjust the number of first transistors and second transistors turned on or off; wherein, the driving capability of the first driving module refers to the number of first transistors and second transistors turned on or off. The control terminal of the second transistor is electrically connected to the first control terminal of the operational amplifier.

[0009] In some embodiments, the operational amplifier further includes: a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, and a seventh transistor; the control terminal of the third transistor is electrically connected to the first input terminal of the operational amplifier, the first terminal of the third transistor is electrically connected to the second terminal of the seventh transistor, the second terminal of the third transistor is electrically connected to the first terminal of the fifth transistor, and is also electrically connected to the control terminals of the fifth and sixth transistors; the control terminal of the fourth transistor is electrically connected to the second input terminal of the operational amplifier, the first terminal of the fourth transistor is electrically connected to the second terminal of the seventh transistor, the second terminal of the fourth transistor is electrically connected to the first terminal of the sixth transistor, and is also electrically connected to the control terminal of the first transistor; the second terminal of the fifth transistor is electrically connected to the ground terminal, the second terminal of the sixth transistor is electrically connected to the ground terminal; and the first terminal of the seventh transistor is electrically connected to the voltage terminal.

[0010] In some embodiments, the switching module includes: an eighth transistor and a current source; the control terminal of the eighth transistor is the control terminal of the switching module, the first terminal of the eighth transistor is the first terminal of the switching module, and the second terminal of the eighth transistor is the third terminal of the switching module; the first terminal of the current source is the second terminal of the switching module, and the second terminal of the current source is the first terminal of the switching module.

[0011] In some embodiments, the logic control module includes: a first control module and a second control module; a first input terminal of the second control module is electrically connected to a first output terminal of the first control module, a second input terminal of the second control module is a first input terminal of the logic control module, and a first output terminal of the second control module is a first output terminal of the logic control module.

[0012] The driving unit further includes: a second driving module; the control terminal of the second driving module is electrically connected to the second output terminal of the second control module; the first terminal of the second driving module is electrically connected to the control terminal of the switch module, and the second terminal of the second driving module is electrically connected to the ground terminal; the second driving module is configured to control the opening or closing of the switch module; the first control module is configured to output an N-bit digital control code to the second control module, and the second control module is configured to convert the N-bit digital control code into an adjustment coefficient; the adjustment coefficient is used to adjust the driving capability of the second driving module, and the driving capability of the second driving module is related to the opening or closing speed of the switch module.

[0013] In some embodiments, the second driving module includes: a plurality of ninth transistors; the plurality of ninth transistors are connected in parallel; the control terminal of the ninth transistor is electrically connected to the control terminal of the second driving module, the first terminal of the ninth transistor is electrically connected to the first terminal of the second driving module, and the second terminal of the ninth transistor is electrically connected to the second terminal of the second driving module; the adjustment coefficient is within a second range, and the second control module is configured to adjust the number of the first transistor, the second transistor, and the ninth transistor being turned on or off; wherein, the driving capability of the second driving module refers to the number of ninth transistors being turned on or off.

[0014] Based on the above scheme, some embodiments of this application provide a driving unit. This driving unit detects the current magnitude in the switching module in real time through a logic control module, generates different adjustment coefficients based on different currents, and transmits the adjustment coefficients to a first driving module. The first driving module receives the adjustment coefficients and controls its own driving capability, thereby controlling the opening or closing speed of the switching module. If it is necessary to further improve the opening speed of the switching module, a second driving module needs to be added. The second driving module increases the number of ninth transistors that are turned on, which allows the level of the control terminal of the switching module to be pulled up to the conduction level more quickly, resulting in a faster opening speed of the switching module and a better user experience.

[0015] In some embodiments, the drive unit further includes: a third drive module; the control terminal of the third drive module is electrically connected to the third output terminal of the second control module; the first terminal of the third drive module is electrically connected to the voltage terminal, and the second terminal of the third drive module is electrically connected to the third terminal of the switch module; the third drive module is configured to charge the load; the adjustment coefficient is also used to adjust the driving capability of the third drive module, and the driving capability of the third drive module is indirectly related to the speed at which the switch module is turned on or off.

[0016] In some embodiments, the third driving module includes: a plurality of tenth transistors; the plurality of tenth transistors are connected in parallel; the control terminal of the tenth transistor is electrically connected to the control terminal of the third driving module, the first terminal of the tenth transistor is electrically connected to the first terminal of the third driving module, and the second terminal of the tenth transistor is electrically connected to the second terminal of the third driving module; the adjustment coefficient is within a third range, and the second control module is configured to adjust the number of the ninth transistor and the tenth transistor turned on or off; wherein, the driving capability of the third driving module refers to the number of the tenth transistors turned on or off.

[0017] Based on the above solutions, some embodiments of this application provide a driving unit. This driving unit detects the current magnitude in the switching module in real time through a logic control module, generates different adjustment coefficients based on different currents, and transmits the adjustment coefficients to a first driving module and a second driving module. The first and second driving modules receive the adjustment coefficients and control their own driving capabilities, thereby controlling the on / off speed of the switching module. If it is necessary to further control the conduction time of the load, a third driving module needs to be added. The third driving module can precharge the load by increasing the number of turned-on tenth transistors. After the switching module is turned on, the voltage of the load reaches the conduction voltage faster, which essentially improves the conduction speed of the load. From the user's perspective, the screen lights up and changes simultaneously, thus providing a better viewing experience.

[0018] In some embodiments, the logic control module includes: a first control module and a second control module; a first input terminal of the second control module is electrically connected to a first output terminal of the first control module, a second input terminal of the second control module is the first input terminal of the logic control module, and a first output terminal of the second control module is the first output terminal of the logic control module; the driving unit further includes: a third driving module; a control terminal of the third driving module is electrically connected to a third output terminal of the second control module; a first terminal of the third driving module is electrically connected to the voltage terminal, and a second terminal of the third driving module is electrically connected to a third terminal of the switch module; the third driving module is configured to charge the load; the first control module is configured to output an N-bit digital control code to the second control module, and the second control module is configured to convert the N-bit digital control code into an adjustment coefficient; the adjustment coefficient is used to adjust the driving capability of the third driving module, and the driving capability of the third driving module is indirectly related to the speed at which the switch module is turned on or off.

[0019] In some embodiments, the third driving module includes: a plurality of tenth transistors; the plurality of tenth transistors are connected in parallel; the control terminal of the tenth transistor is electrically connected to the control terminal of the third driving module, the first terminal of the tenth transistor is electrically connected to the first terminal of the third driving module, and the second terminal of the tenth transistor is electrically connected to the second terminal of the third driving module; the adjustment coefficient is within a third range, and the second control module is configured to adjust the number of the first transistor, the second transistor, and the tenth transistor being turned on or off; wherein, the driving capability of the third driving module refers to the number of tenth transistors being turned on or off.

[0020] Secondly, some embodiments of this application also provide a driver chip, which includes the aforementioned plurality of driver units.

[0021] The beneficial effects of using it for the driver chip are the same as those of the aforementioned driver unit, and will not be repeated here.

[0022] Thirdly, some embodiments of this application also provide a display device, which includes the aforementioned driving chip and lamp board. The lamp board is provided with multiple rows of light-emitting diodes, and the multiple driving units are correspondingly connected to the multiple rows of light-emitting diodes; wherein, the light-emitting diodes serve as loads.

[0023] The beneficial effects of using it in a display device are the same as those of the aforementioned driving unit, and will not be repeated here.

[0024] In some embodiments, the load further includes: a first capacitor; the positive terminal of the light-emitting diode is electrically connected to the third terminal of the switching module, the negative terminal of the light-emitting diode is electrically connected to the ground terminal, and the first capacitor is connected in parallel with the light-emitting diode; when the driving unit includes a third driving module, the third driving module charges the first capacitor. Attached Figure Description

[0025] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0026] Figure 1 A schematic diagram of a driving unit in the prior art provided for an embodiment of this application;

[0027] Figure 2 A schematic diagram of a drive unit channel opening process in the prior art provided in this application embodiment;

[0028] Figure 3 A schematic diagram of a driving unit provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of another driving unit provided in an embodiment of this application;

[0030] Figure 5 A schematic diagram of a first driving module provided in an embodiment of this application;

[0031] Figure 6 A schematic diagram of an operational amplifier provided for an embodiment of this application;

[0032] Figure 7 A schematic diagram of another operational amplifier provided in an embodiment of this application;

[0033] Figure 8 A schematic diagram of a switch module provided in an embodiment of this application;

[0034] Figure 9 A schematic diagram of a second driving module provided in an embodiment of this application;

[0035] Figure 10 A schematic diagram of a third driving module provided in an embodiment of this application;

[0036] Figure 11 A schematic diagram of another driving unit provided in an embodiment of this application;

[0037] Figure 12 This application provides a structural block diagram of a driver chip according to an embodiment of the present application.

[0038] Figure 13 A structural block diagram of a display device provided in an embodiment of this application;

[0039] Figure 14 A schematic diagram of a load provided for an embodiment of this application;

[0040] Figure 15 A schematic diagram of another load provided for an embodiment of this application;

[0041] Figure 16 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" in this utility model have the meaning of establishing conductivity. The specific meaning needs to be understood in conjunction with the context.

[0046] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0047] As described in the background section, in LED display technology, many driving units use pulse width modulation (PWM) to drive multiple LED groups. To improve the grayscale of LED displays, the PWM adjustment width needs to be more precisely controlled, thus the PWM adjustment frequency has gradually increased.

[0048] In high-frequency displays, the switching speed of the channels affects the application of PWM in high-frequency regulation. Currently, increasing the driving capability in the drive unit, such as by adjusting the operational amplifier's SR, is commonly used to improve the channel turn-on speed. However, in actual use, the requirements for channel turn-on speed vary under different current levels, and different lamps have different characteristics.

[0049] Operational amplifier (op-amp) SR adjustment refers to the process of adjusting or optimizing the slew rate (SR) of an operational amplifier. Slew rate is an important parameter measuring an op-amp's ability to adapt to changes in signal speed; it reflects the slew rate of the op-amp's output voltage, that is, the maximum value that the op-amp's output voltage can change per unit time. Slew rate is usually expressed in V / s, V / ms, or V / μs.

[0050] For example, refer to Figure 1 In the prior art, the driving unit includes a driving section (first part in the figure) and a switching section (second part in the figure). The driving section is also an operational amplifier, which determines the turning speed of the switching section in the channel. The switching section includes a switching transistor P1 and a current transistor P2, where the switching transistor P1 is responsible for turning the channel on and off, and the current transistor P2 determines the magnitude of the channel current.

[0051] Reference Figure 2 , Figure 2 This is a schematic diagram of the drive unit channel turn-on process in the prior art. When the switching transistor P1 is turned on, different SRs will correspond to different turn-on speeds. Figure 2Different slopes in the diagram correspond to different SR values. The larger the slope, the faster the switching transistor P1 turns on. After the switching transistor P1 turns on, the DRV-OUT output by the drive unit enables the LED to work normally, which is the display part shown in the diagram. The clamping in the diagram refers to the state when the switching transistor P1 is not turned on, at which time the LED does not work. The pre-charging in the diagram refers to a stabilization process. When the switching transistor P1 just turns on, the voltage is not very stable, which allows for pre-charging of the capacitor.

[0052] The aforementioned existing technologies typically increase the clamping operational amplifier current to improve the turn-on speed of the channel switch. In actual design, multiple current levels, such as static registers, are used to control the number of MOSFETs in the operational amplifier, thereby controlling the turn-on speed of the channel switch. For example... Figure 2 As shown, AMP-SR determines the channel activation speed when the display is on. However, for different usage scenarios, including different times, different current levels, different LEDs or channels, a fixed SR value is usually determined at the beginning of use. Modifying any of these conditions later will result in different display effects, making it difficult to achieve consistent results.

[0053] Based on this, embodiments of this application provide a driving unit. For example... Figure 3 As shown, the drive unit 100 includes: a first drive module 1, a switch module 2, and a logic control module 3.

[0054] The first input terminal 101 of the first drive module 1 is electrically connected to the reference voltage terminal VREF.

[0055] The control terminal 20X of the switch module 2 is electrically connected to the output terminal 103 of the first drive module 1; the first terminal 201 of the switch module 2 is electrically connected to the second input terminal 102 of the first drive module 1; the second terminal 202 of the switch module 2 is electrically connected to the power supply terminal VCC; and the third terminal 203 of the switch module 2 is electrically connected to the load 110.

[0056] The first output terminal 301 of the logic control module 3 is electrically connected to the control terminal 10X of the first drive module 1.

[0057] The first drive module 1 is configured to control the switch module 2 to turn on or off; the logic control module 3 is configured to output the adjustment coefficient to the first drive module 1.

[0058] The adjustment coefficient is used to adjust the driving capability of the first driving module 1, which is related to the speed at which the switch module 2 is turned on or off.

[0059] The driving capability mentioned above is related to the conduction level of the first driving module. The higher the driving capability, the higher the conduction level, which means that more devices in the first driving module are turned on. Similarly, the lower the driving capability, the lower the conduction level, which means that fewer devices in the first driving module are turned on. The number of devices turned on in the first driving module can be changed by adjusting the driving capability.

[0060] For example, the adjustment coefficient ranges from 0 to 127, with different coefficients corresponding to different driving capabilities. When the adjustment coefficient is 64, it corresponds to normal driving capability; at this time, the opening or closing speed of switch module 2 is also normal.

[0061] In some scenarios, the load needs to operate normally; in this case, the adjustment coefficient output by logic control module 3 is 64, and the load is operating normally. If the load needs to conduct faster, logic control module 3 outputs a higher adjustment coefficient of 100. Similarly, if the load needs to conduct at a slower speed than normal, logic control module 3 outputs a lower adjustment coefficient of 30.

[0062] Based on the above solutions, some embodiments of this application provide a driving unit that generates different adjustment coefficients through a logic control module and transmits the adjustment coefficients to a first driving module. The first driving module receives the adjustment coefficients and controls its own driving capability, thereby controlling the on or off speed of the switching module. In this way, the conduction speed of the load can be adjusted, which can further enhance the user experience in practical applications.

[0063] In some embodiments, such as Figure 4 As shown, the first input terminal 3X of the logic control module 3 is electrically connected to the fourth terminal 204 of the switch module 2.

[0064] The logic control module is configured to detect the current magnitude in the switch module 2, generate a corresponding adjustment coefficient based on the current magnitude, and output the adjustment coefficient to the first drive module 1.

[0065] The logic control module 3 is electrically connected to the switch module 2 and is used to detect the current in the switch module. The logic control module 3 provides different adjustment coefficients according to the detected current, which is to adjust the opening speed of the switch module step by step according to the current level.

[0066] In some embodiments, if the detected current is small, a higher adjustment coefficient is required. The logic control module 3 transmits the adjustment coefficient to the first drive module 1. The first drive module 1 receives the adjustment coefficient and increases the driving capability, thereby increasing the speed at which the switch module 2 turns on or off.

[0067] If the detected current is large, the required adjustment coefficient is low. The logic control module 3 transmits the adjustment coefficient to the first drive module 1. The first drive module 1 receives the adjustment coefficient and reduces the driving capability, thereby reducing the speed at which the switch module 2 turns on or off.

[0068] For example, the adjustment coefficient output by logic control module 3 ranges from 0 to 127, with different coefficients corresponding to different driving capabilities. When the adjustment coefficient is 64, it corresponds to normal driving capability; at this time, the opening or closing speed of switch module 2 is also normal.

[0069] If the detected current is small, the output adjustment coefficient will be in the range of 65 to 127. In this case, the driving capability of the first drive module 1 needs to be increased, which can improve the opening or closing speed of the switch module 2.

[0070] If the detected current is large, the output adjustment coefficient will be in the range of 0 to 63. In this case, the driving capability of the first drive module 1 needs to be reduced, which can reduce the opening or closing speed of the switch module 2.

[0071] Based on the above solution, some embodiments of this application provide a driving unit. This driving unit detects the current magnitude in the switching module in real time through a logic control module, generates different adjustment coefficients for different currents, and transmits the adjustment coefficients to a first driving module. The first driving module receives the adjustment coefficients and controls its own driving capability, thereby controlling the opening or closing speed of the switching module. In this way, the opening speed of the switching module can be adjusted step by step according to the current level, so that the opening speed is consistent, which can further enhance the user experience in practical applications.

[0072] like Figure 5 As shown, in some embodiments, the first driving module 1 includes an operational amplifier 11.

[0073] The first input terminal of the operational amplifier 11 is the first input terminal 101 of the first driver module 1, the second input terminal of the operational amplifier 11 is the second input terminal 102 of the first driver module 1, and the output terminal of the operational amplifier 11 is the output terminal 103 of the first driver module 1; the control terminal of the operational amplifier 11 is electrically connected to the control terminal 10X of the first driver module 1.

[0074] In some embodiments, the first input terminal of the operational amplifier 11 is the positive terminal IN+, and the second input terminal of the operational amplifier 11 is the negative terminal IN-.

[0075] In other words, the logic control module 3 is electrically connected to the switch module 2 and is used to detect the current in the switch module. The logic control module 3 provides different adjustment coefficients according to the detected current and transmits the adjustment coefficients to the operational amplifier via the control terminal of the operational amplifier 11 to adjust the driving capability of the operational amplifier.

[0076] like Figure 6 and Figure 7 As shown, in some embodiments, the operational amplifier 11 includes a plurality of first transistors M1 and a plurality of second transistors M2. The plurality of first transistors M1 are connected in parallel, and the plurality of second transistors M2 are connected in parallel. Figure 5 The following explanation uses two transistors as an example.

[0077] The operational amplifier 11 has the following control terminals: a first control terminal 111X and a second control terminal 112X.

[0078] The control terminal of the first transistor M1 is electrically connected to the first control terminal 111X of the operational amplifier 11, the first terminal of the first transistor M1 is electrically connected to the second terminal of the second transistor M2, and the second terminal of the first transistor M1 is electrically connected to the ground terminal.

[0079] The control terminal of the second transistor M2 is electrically connected to the second control terminal 112X of the operational amplifier 11, and the first terminal of the second transistor M2 is electrically connected to the voltage terminal VDD.

[0080] In some embodiments, when the first transistor M1 is turned on, a low level is transmitted to the switching module to turn on the switching module, and when the second transistor M2 is turned on, a high level is transmitted to the switching module to turn off the switching module.

[0081] Within a first range, the adjustment coefficient allows the logic control module 3 to adjust the number of times the first transistor M1 and the second transistor M2 are turned on or off; wherein, the driving capability of the first driving module 1 refers to the number of times the first transistor M1 and the second transistor M2 are turned on or off. The control terminal of the second transistor M2 is electrically connected to the first control terminal of the operational amplifier 11.

[0082] For example, the adjustment coefficient range is 0 to 255, while the first range is 0 to 63; when the adjustment coefficient is within the first range, the logic control module 3 adjusts the number of the first transistor M1 and the second transistor M2 that are turned on or off.

[0083] The more transistors M1 are turned on, the faster the level of the control terminal of the switching module will be pulled down to a low level, resulting in a faster turn-on speed. Similarly, the fewer transistors M1 are turned on, the slower the level of the control terminal of the switching module will be pulled down to a low level, resulting in a slower turn-on speed. This allows control over the turn-on time of the load, thereby achieving channel-by-channel consistency.

[0084] In some embodiments, the operational amplifier 11 further includes a second capacitor C2, a third capacitor C3, and a fourth capacitor C4.

[0085] The first terminal of the second capacitor C2 is electrically connected to the first terminal of the third capacitor C3, and is also electrically connected to the control terminal of the first transistor M1. The second terminal of the second capacitor C2 is electrically connected to the second terminal of the second transistor M2, and is also electrically connected to the first terminal of the fourth capacitor C4. The second terminal of the third capacitor C3 is grounded, and the second terminal of the fourth capacitor C4 is grounded.

[0086] The second capacitor C2 serves as a bypass capacitor, primarily used to eliminate high-frequency noise in the circuit, prevent such noise from interfering with the normal operation of the circuit, and ensure the pure transmission of signals.

[0087] The third capacitor, C3, serves as a compensation capacitor. Its main function is to adjust the position of the circuit poles, improve the phase margin of the system, and ensure the stability of the system.

[0088] The fourth capacitor, C4, serves as the load capacitor. It is responsible for absorbing the energy from the second terminal of the first transistor M1, which helps stabilize the output voltage and optimize the overall performance of the circuit.

[0089] like Figure 7 As shown, in some embodiments, the operational amplifier 11 further includes a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, and a seventh transistor M7.

[0090] The control terminal of the third transistor M3 is electrically connected to the first input terminal of the operational amplifier 11. The first terminal of the third transistor M3 is electrically connected to the second terminal of the seventh transistor M7. The second terminal of the third transistor M3 is electrically connected to the first terminal of the fifth transistor M5, and is also electrically connected to the control terminals of the fifth transistor M5 and the sixth transistor M6. The control terminal of the fourth transistor M4 is electrically connected to the second input terminal of the operational amplifier 11. The first terminal of the fourth transistor M4 is electrically connected to the second terminal of the seventh transistor M7. The second terminal of the fourth transistor M4 is electrically connected to the first terminal of the sixth transistor M6, and is also electrically connected to the control terminal of the first transistor M1. The second terminal of the fifth transistor M5 is electrically connected to the ground terminal. The second terminal of the sixth transistor M6 is electrically connected to the ground terminal. The first terminal of the seventh transistor M7 is electrically connected to the voltage terminal VDD.

[0091] like Figure 8 As shown, in some embodiments, the switching module 2 includes an eighth transistor M8 and a current source P.

[0092] The control terminal of the eighth transistor M8 is the control terminal of the switch module 2, the first terminal of the eighth transistor M8 is the first terminal of the switch module 2, and the second terminal of the eighth transistor M8 is the third terminal of the switch module 2.

[0093] The first terminal of the current source P is the second terminal 202 of the switch module 2, and the second terminal of the current source P is the first terminal 201 of the switch module 2; the third terminal of the current source P is electrically connected to the first input terminal 3X of the logic control module 3; that is, the third terminal of the current source P is the fourth terminal 204 of the switch module 2.

[0094] Among them, the logic control module 3 is configured to collect the current data of the current source P.

[0095] like Figure 9 As shown, in some embodiments, the logic control module 3 includes: a first control module 31 and a second control module 32.

[0096] The first input terminal 321 of the second control module 32 is electrically connected to the first output terminal of the first control module 31. The second input terminal 322 of the second control module 32 is the first input terminal 3X of the logic control module 3, and the first output terminal 325 of the second control module 32 is the first output terminal 301 of the logic control module 3.

[0097] In some embodiments, the first control module 31 is a latch and the second control module 32 is a register.

[0098] The second control module 32 is used to detect the current in the switching module, and thus provides different adjustment coefficients based on the detected current. The first control module 31 provides digital control codes.

[0099] For example, if the first control module 31 provides an eight-bit digital control code, the adjustment coefficient will range from 0 to 255.

[0100] Reference Figure 9 The drive unit 100 also includes a second drive module 4.

[0101] The control terminal 40X of the second drive module 4 is electrically connected to the second output terminal of the second control module 32; the first terminal 401 of the second drive module 4 is electrically connected to the control terminal 20X of the switch module 2; and the second terminal 402 of the second drive module 4 is electrically connected to the ground terminal GND.

[0102] The second drive module 4 is configured to control the opening or closing of the switch module 2; the first control module 31 is configured to output an N-bit digital control code to the second control module 32, and the second control module 32 is configured to convert the N-bit digital control code into an adjustment coefficient; the adjustment coefficient is used to adjust the driving capability of the second drive module 4, and the driving capability of the second drive module 4 is related to the speed at which the switch module 2 opens or closes.

[0103] In some embodiments, if N=8, the first control module 31 is configured to output an 8-bit digital control code to the second control module 32, such that the adjustment coefficient ranges from 0 to 255.

[0104] In some embodiments, the second driving module 4 includes a plurality of ninth transistors M9. The plurality of ninth transistors M9 are connected in parallel.

[0105] The control terminal of the ninth transistor M9 is electrically connected to the control terminal 40X of the second drive module 4, the first terminal of the ninth transistor M9 is electrically connected to the first terminal of the second drive module 4, and the second terminal of the ninth transistor M9 is electrically connected to the second terminal of the second drive module 4.

[0106] Within the second range, the adjustment coefficient is configured to adjust the number of times the first transistor M1, the second transistor M2, and the ninth transistor M9 are turned on or off; wherein, the driving capability of the second driving module 4 refers to the number of times the ninth transistor M9 is turned on or off.

[0107] For example, the adjustment coefficient ranges from 0 to 255, with the first range being 0 to 63 and the second range being 64 to 127. When the adjustment coefficient is within the first range, the logic control module 3 adjusts the number of first transistor M1 and second transistor M2 that are turned on or off. When the adjustment coefficient is within the second range, the influence of first transistor M1 and second transistor M2 on the switching speed of the switching module gradually decreases. At this point, the second drive module 4, namely the ninth transistor M9, is needed to further enhance the switching speed. That is, the second control module 32 is configured to adjust the number of first transistor M1, second transistor M2, and ninth transistor M9 that are turned on or off.

[0108] Based on the above scheme, some embodiments of this application provide a driving unit. This driving unit detects the current magnitude in the switching module in real time through a logic control module, generates different adjustment coefficients based on different currents, and transmits the adjustment coefficients to a first driving module. The first driving module receives the adjustment coefficients and controls its own driving capability, thereby controlling the opening or closing speed of the switching module. If it is necessary to further improve the opening speed of the switching module, a second driving module needs to be added. The second driving module increases the number of ninth transistors that are turned on, which allows the level of the control terminal of the switching module to be pulled up to the conduction level more quickly, resulting in a faster opening speed of the switching module and a better user experience.

[0109] In some embodiments, refer to Figure 10 The drive unit 100 also includes a third drive module 5.

[0110] The control terminal 50X of the third drive module 5 is electrically connected to the third output terminal 324 of the second control module 32; the first terminal 501 of the third drive module 5 is electrically connected to the voltage terminal VCC; and the second terminal 502 of the third drive module 5 is electrically connected to the third terminal 203 of the switch module 2.

[0111] The third drive module 5 is configured to charge the load; the adjustment coefficient is also used to adjust the driving capability of the third drive module 5, which is indirectly related to the speed at which the switch module 2 is turned on or off.

[0112] In some embodiments, the third drive module 5 includes a plurality of tenth transistors M10. The plurality of tenth transistors M10 are connected in parallel.

[0113] The control terminal of the tenth transistor M10 is electrically connected to the control terminal of the third drive module 5, the first terminal of the tenth transistor M10 is electrically connected to the first terminal of the third drive module 5, and the second terminal of the tenth transistor M10 is electrically connected to the second terminal of the third drive module 5; the adjustment coefficient is within the third range, and the second control module 32 is configured to adjust the number of times the ninth transistor M9 and the tenth transistor M10 are turned on or off; wherein, the driving capability of the third drive module 5 refers to the number of times the tenth transistor M10 is turned on or off.

[0114] For example, the adjustment coefficient range is 0–255, with the first range being 0–63; the second range being 64–127; and the third range being 128–255. When the adjustment coefficient is within the first range, the logic control module 3 adjusts the number of first transistor M1 and second transistor M2 that are turned on or off. When the adjustment coefficient is within the second range, the influence of first transistor M1 and second transistor M2 on the switching speed of the switching module gradually decreases. At this point, the second drive module 4, namely the ninth transistor M9, is needed to further enhance the switching speed. That is, the second control module 32 is configured to adjust the number of first transistor M1, second transistor M2, and ninth transistor M9 that are turned on or off. When the adjustment coefficient is within the third range, the influence of ninth transistor M9 on the switching speed of the switching module gradually decreases. At this point, the third drive module 5, namely the tenth transistor M10, is needed to further enhance the switching speed. That is, the second control module 32 is configured to adjust the number of ninth transistor M9 and tenth transistor M10 that are turned on or off.

[0115] When the adjustment coefficient is within 0 to 127, the first transistor M1 and the second transistor M2 are still being adjusted. When it is within the range of 128 to 255, the first transistor M1 and the second transistor M2 have reached their maximum. To increase the speed, the ninth transistor M9 and the tenth transistor M10 can be adjusted.

[0116] Based on the above solutions, some embodiments of this application provide a driving unit. This driving unit detects the current magnitude in the switching module in real time through a logic control module, generates different adjustment coefficients based on different currents, and transmits the adjustment coefficients to a first driving module and a second driving module. The first and second driving modules receive the adjustment coefficients and control their own driving capabilities, thereby controlling the on / off speed of the switching module. If it is necessary to further control the conduction time of the load, a third driving module needs to be added. The third driving module can precharge the load by increasing the number of turned-on tenth transistors. After the switching module is turned on, the voltage of the load reaches the conduction voltage faster, which essentially improves the conduction speed of the load. From the user's perspective, the screen lights up and changes simultaneously, thus providing a better viewing experience.

[0117] like Figure 11 As shown, in some embodiments, there are only the first driving module 1 and the third driving module 5.

[0118] For example, the adjustment coefficient ranges from 0 to 255, with the first range being 0 to 63 and the second range being 64 to 127. When the adjustment coefficient is within the first range, the logic control module 3 adjusts the number of first transistor M1 and second transistor M2 that are turned on or off. When the adjustment coefficient is within the second range, the influence of first transistor M1 and second transistor M2 on the switching speed of the switching module gradually decreases. At this point, a third drive module 5, namely the tenth transistor M10, is needed to further enhance the switching speed. That is, the second control module 32 is configured to adjust the number of first transistor M1, second transistor M2, and tenth transistor M10 that are turned on or off.

[0119] like Figure 12 As shown, some embodiments of this application also provide a driver chip, the driver chip 200 including the above-mentioned plurality of driver units 100.

[0120] Each driving unit 100 is connected to one load, and the driving chip 200 is connected to multiple loads; for example, if the load is a row of light-emitting diodes, then the driving chip is connected to multiple rows of light-emitting diodes.

[0121] like Figure 13 As shown, some embodiments of this application also provide a display device 300, which includes the aforementioned driving chip 200 and lamp board 120. The lamp board 120 is provided with multiple rows of light-emitting diodes 130, and multiple driving units 100 are correspondingly connected to the multiple rows of light-emitting diodes; wherein, the light-emitting diodes serve as loads 110.

[0122] In other words, the conduction time of each column of light-emitting diodes 130 in the lamp board can be adjusted in real time through multiple driving units 100, thereby achieving channel-by-channel consistency.

[0123] like Figure 14 As shown, the load 110 also includes a first capacitor C1.

[0124] The positive terminal of LED D is electrically connected to the third terminal 203 of switch module 2, and the negative terminal of LED D is electrically connected to the ground terminal GND.

[0125] The first capacitor C1 is connected in parallel with the light-emitting diode D; when the driving unit 100 includes the third driving module 5, the third driving module 5 charges the first capacitor C1; that is, pre-charging.

[0126] For example, if a light-emitting diode (LED) requires a turn-on voltage of 3V, and it takes time to increase the voltage from 0V to 3V, if the voltage of the first capacitor C1 is pre-charged to 2.5V, the time required to increase the voltage from 2.5V to 3V will be shorter than the time required to increase the voltage from 0V to 3V. In this way, the LED can turn on faster.

[0127] The third driving module does not directly act on the switching module. Instead, it increases the conduction speed of the LED in the load by increasing the pre-charging speed of the first capacitor C1, which is equivalent to increasing the conduction speed of the switching module.

[0128] In some embodiments, for applications with relatively uniform light panels and fewer variables, the adjustment coefficient can be configured point by point to a smaller and more suitable configuration, thereby reducing power consumption.

[0129] Reference Figure 14 and Figure 15 The load 110 includes a column of light-emitting diodes (LEDs), and the column of LEDs includes multiple LEDs. The multiple LEDs have different characteristics and require different conduction voltages, which in turn result in different conduction times. Therefore, it is necessary to adjust the switching conduction speed of the LEDs pixel by pixel.

[0130] In some embodiments, a row of light-emitting diodes includes: a first light-emitting diode D1, a second light-emitting diode D2, and a third light-emitting diode D3; the load 110 also includes: a first switch K1, a second switch K2, and a third switch K3.

[0131] The positive terminal of the first LED D1 is electrically connected to the third terminal 203 of the switch module 2, and the negative terminal of the first LED D1 is electrically connected to the first terminal of the first switch K1. The second terminal of the first switch K1 is grounded. When the first switch K1 is on, the negative terminal of the first LED D1 is grounded, thus making the first LED D1 conduct; when the first switch K1 is off, the negative terminal of the first LED D1 cannot be grounded, thus making the first LED D1 not conduct.

[0132] The positive terminal of the second LED D2 is electrically connected to the third terminal 203 of the switch module 2, and the negative terminal of the second LED D2 is electrically connected to the first terminal of the second switch K2. The second terminal of the second switch K2 is grounded. When the second switch K2 is on, the negative terminal of the second LED D2 is grounded, thus turning on the second LED D1. When the second switch K2 is off, the negative terminal of the second LED D1 cannot be grounded, thus preventing the first LED D1 from conducting.

[0133] The positive terminal of the third LED D3 is electrically connected to the third terminal 203 of the switch module 2, and the negative terminal of the third LED D3 is electrically connected to the first terminal of the third switch K3. The second terminal of the third switch K3 is grounded. When the third switch K3 is on, the negative terminal of the first LED D1 is grounded, thus making the first LED D1 conduct; when the third switch K3 is off, the negative terminal of the first LED D1 cannot be grounded, thus making the first LED D1 not conduct.

[0134] For example, the first LED D1 needs 3ns to conduct, the second LED D2 needs 10ns, and the third LED D3 needs 1ns. To make the conduction time of the three LEDs the same, we can first set the adjustment coefficient of the first LED to 80, the adjustment coefficient of the second LED to 120, and the adjustment coefficient of the third LED to 40. That is, we speed up the switching speed of the second LED, slow down the switching speed of the third LED, and adjust the switching speed of the first LED to be between that of the second and third LEDs.

[0135] In other words, the first switch K1, the second switch K2, and the third switch K3 are turned on in sequence, and the switching time is very short. When the corresponding switch is turned on, the drive module is adjusted to change the adjustment coefficient, so that the turn-on time is basically the same.

[0136] Under normal conditions, the human eye can recognize continuous images at a rate of 24 frames per second, or 1000 milliseconds / 24 frames, approximately 40 ms. The conduction times of the first LED D1, the second LED D2, and the third LED D3 are basically the same and will not affect the user's viewing experience.

[0137] Reference Figure 16 The driver chip is connected to multiple rows of light-emitting diodes, which are arranged in a matrix. Figure 15 The switch corresponds to each light-emitting diode (LED). In some embodiments, the switch may also correspond to the row number of LEDs.

[0138] The on-time of a column of LEDs is controlled by an output adjustment coefficient. Then, each column of LEDs is adjusted sequentially until the on-time is basically the same. This adjustment method is applicable to situations where the precision is relatively low. It is not necessary to adjust the on-time of each LED individually, but only to ensure that the on-time of each column is the same. As a result, the adjustment speed is faster and the user experience is better.

[0139] Therefore, the driver chip is connected to multiple rows of LEDs, and the logic control module adjusts each row of LEDs to ensure channel-by-channel consistency.

[0140] Based on the above solutions, some embodiments of this application provide a display device. This display device uses a logic control module in a driving unit to detect the current magnitude in the switching module in real time. Different adjustment coefficients are generated based on different currents, and these coefficients are transmitted to a first driving module. The first driving module receives the adjustment coefficients and controls its own driving capability, thereby controlling the on / off speed of the switching module. This allows for adjustment of the switching module's on / off speed at different current levels, ensuring consistent on / off speeds and enhancing the user experience in practical applications. Simultaneously, the logic control module further controls the on / off speeds of the switching module through a second and third driving module. The load corresponds to a row of LEDs, thus the logic control module's adjustment satisfies channel-by-channel consistency. Furthermore, each LED has an inconsistent conduction time due to its inherent characteristics; the logic control module's adjustment makes the conduction time of each LED the same, thus satisfying pixel-by-pixel consistency, meaning the conduction time of each LED can be adjusted. Ultimately, the user sees a row of LEDs lit simultaneously, further enhancing the user experience.

[0141] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A driving unit, characterized in that, include: A first driving module, wherein the first input terminal of the first driving module is electrically connected to the reference voltage terminal; The switching module has a control terminal electrically connected to the output terminal of the first drive module, a first terminal electrically connected to the second input terminal of the first drive module, a second terminal electrically connected to a power supply terminal, and a third terminal electrically connected to a load. The logic control module has its first output terminal electrically connected to the control terminal of the first drive module. The first drive module is configured to control the switch module to turn on or off; The logic control module is configured to output an adjustment coefficient to the first drive module; the adjustment coefficient is used to adjust the driving capability of the first drive module, and the driving capability of the first drive module is related to the speed at which the switch module is turned on or off.

2. The driving unit according to claim 1, characterized in that, The first driving module includes: an operational amplifier; The first input terminal of the operational amplifier is the first input terminal of the first driver module, the second input terminal of the operational amplifier is the second input terminal of the first driver module, and the output terminal of the operational amplifier is the output terminal of the first driver module; the control terminal of the operational amplifier is electrically connected to the control terminal of the first driver module.

3. The driving unit according to claim 2, characterized in that, The operational amplifier includes: a plurality of first transistors and a plurality of second transistors; the plurality of first transistors are connected in parallel, and the plurality of second transistors are connected in parallel; the control terminal of the operational amplifier includes: a first control terminal and a second control terminal; The control terminal of the first transistor is electrically connected to the first control terminal of the operational amplifier, the first terminal of the first transistor is electrically connected to the second terminal of the second transistor, and the second terminal of the first transistor is electrically connected to the ground terminal. The control terminal of the second transistor is electrically connected to the second control terminal of the operational amplifier, and the first terminal of the second transistor is electrically connected to the voltage terminal. The adjustment coefficient is within a first range, and the logic control module is configured to adjust the number of the first transistor and the second transistor that are turned on or off; wherein, the driving capability of the first driving module refers to the number of the first transistor and the second transistor that are turned on or off. The control terminal of the second transistor is electrically connected to the first control terminal of the operational amplifier.

4. The driving unit according to claim 3, characterized in that, The operational amplifier further includes: a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, and a seventh transistor; The control terminal of the third transistor is electrically connected to the first input terminal of the operational amplifier, the first terminal of the third transistor is electrically connected to the second terminal of the seventh transistor, the second terminal of the third transistor is electrically connected to the first terminal of the fifth transistor, and is also electrically connected to the control terminals of the fifth transistor and the sixth transistor. The control terminal of the fourth transistor is electrically connected to the second input terminal of the operational amplifier, the first terminal of the fourth transistor is electrically connected to the second terminal of the seventh transistor, the second terminal of the fourth transistor is electrically connected to the first terminal of the sixth transistor, and is also electrically connected to the control terminal of the first transistor. The second terminal of the fifth transistor is electrically connected to the ground terminal, the second terminal of the sixth transistor is electrically connected to the ground terminal, and the first terminal of the seventh transistor is electrically connected to the voltage terminal.

5. The driving unit according to claim 1, characterized in that, The switching module includes: The eighth transistor has a control terminal that is the control terminal of the switching module, a first terminal that is the first terminal of the switching module, and a second terminal that is the third terminal of the switching module. A current source, wherein the first end of the current source is the second end of the switching module, and the second end of the current source is the first end of the switching module.

6. The drive unit according to any one of claims 1 to 4, characterized in that, The logic control module includes: First control module; The second control module has a first input terminal electrically connected to the first output terminal of the first control module, the second input terminal of the second control module is the first input terminal of the logic control module, and the first output terminal of the second control module is the first output terminal of the logic control module. The drive unit further includes: a second drive module; the control terminal of the second drive module is electrically connected to the second output terminal of the second control module; the first terminal of the second drive module is electrically connected to the control terminal of the switch module, and the second terminal of the second drive module is electrically connected to the ground terminal. The second drive module is configured to control the switching module to turn on or off; The first control module is configured to output an N-bit digital control code to the second control module, and the second control module is configured to convert the N-bit digital control code into an adjustment coefficient. The adjustment coefficient is used to adjust the driving capability of the second driving module, which is related to the speed at which the switch module is turned on or off.

7. The driving unit according to claim 6, characterized in that, In the case where the first driving module includes an operational amplifier and the operational amplifier includes multiple first transistors and multiple second transistors, the second driving module includes: multiple ninth transistors; the multiple ninth transistors are connected in parallel; The control terminal of the ninth transistor is electrically connected to the control terminal of the second driving module, the first terminal of the ninth transistor is electrically connected to the first terminal of the second driving module, and the second terminal of the ninth transistor is electrically connected to the second terminal of the second driving module. The adjustment coefficient is within a second range, and the second control module is configured to adjust the number of the first transistor, the second transistor, and the ninth transistor that are turned on or off; wherein, the driving capability of the second driving module refers to the number of the ninth transistor that is turned on or off.

8. The driving unit according to claim 7, characterized in that, The drive unit further includes: a third drive module; the control terminal of the third drive module is electrically connected to the third output terminal of the second control module; the first terminal of the third drive module is electrically connected to the voltage terminal, and the second terminal of the third drive module is electrically connected to the third terminal of the switch module; The third drive module is configured to charge the load; The adjustment coefficient is also used to adjust the driving capability of the third driving module, which is indirectly related to the speed at which the switch module is turned on or off.

9. The driving unit according to claim 8, characterized in that, The third driving module includes: a plurality of tenth transistors; the plurality of tenth transistors are connected in parallel; The control terminal of the tenth transistor is electrically connected to the control terminal of the third driving module, the first terminal of the tenth transistor is electrically connected to the first terminal of the third driving module, and the second terminal of the tenth transistor is electrically connected to the second terminal of the third driving module. When the adjustment coefficient is within a third range, the second control module is configured to adjust the number of the ninth transistor and the tenth transistor that are turned on or off; wherein, the driving capability of the third driving module refers to the number of the tenth transistor that are turned on or off.

10. The driving unit according to claim 3, characterized in that, The logic control module includes: First control module; The second control module has a first input terminal electrically connected to the first output terminal of the first control module, the second input terminal of the second control module is the first input terminal of the logic control module, and the first output terminal of the second control module is the first output terminal of the logic control module. The drive unit further includes: a third drive module; the control terminal of the third drive module is electrically connected to the third output terminal of the second control module; the first terminal of the third drive module is electrically connected to the voltage terminal, and the second terminal of the third drive module is electrically connected to the third terminal of the switch module; The third drive module is configured to charge the load; The first control module is configured to output an N-bit digital control code to the second control module, and the second control module is configured to convert the N-bit digital control code into an adjustment coefficient. The adjustment coefficient is used to adjust the driving capability of the third driving module, which is indirectly related to the speed at which the switch module is turned on or off.

11. The driving unit according to claim 10, characterized in that, The third driving module includes: a plurality of tenth transistors; the plurality of tenth transistors are connected in parallel; The control terminal of the tenth transistor is electrically connected to the control terminal of the third driving module, the first terminal of the tenth transistor is electrically connected to the first terminal of the third driving module, and the second terminal of the tenth transistor is electrically connected to the second terminal of the third driving module. When the adjustment coefficient is within a third range, the second control module is configured to adjust the number of the first transistor, the second transistor, and the tenth transistor that are turned on or off; wherein, the driving capability of the third driving module refers to the number of the tenth transistor that are turned on or off.

12. A driver chip, characterized in that, It includes a plurality of drive units as described in any one of claims 1 to 11.

13. A display device, characterized in that, The display device includes: At least one driver chip as described in claim 12; A light panel is provided with multiple rows of light-emitting diodes (LEDs), and multiple driving units are connected to the multiple rows of LEDs accordingly; wherein, the LEDs serve as loads.

14. The display device according to claim 13, characterized in that, The load further includes: a first capacitor; the positive terminal of the light-emitting diode is electrically connected to the third terminal of the switching module, the negative terminal of the light-emitting diode is electrically connected to the ground terminal, and the first capacitor is connected in parallel with the light-emitting diode; In the case where the drive unit includes a third drive module, the third drive module charges the first capacitor.

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