Driving circuit, driving method and display device of display panel

Abstract

A driving circuit, a driving method and a display device of a display panel, the driving circuit comprising a driving module, a feedback module, an operational amplifier, a screen driving module and a voltage adjusting module, the operational amplifier comprising a first input end, a second input end and an output end, the feedback module being connected with the second input end, the output end and the voltage adjusting module, the voltage adjusting module being further connected with the screen driving module and the display panel, the driving module being connected with the first input end and transmitting a first voltage, the screen driving module acquiring a low-voltage differential signal and generating a control signal by processing the low-voltage differential signal, the operational amplifier generating a second voltage at the output end according to the first voltage; the feedback module adjusting the second voltage to generate a third voltage, the operational amplifier adjusting the second voltage according to the first voltage and the third voltage to generate a fourth voltage; the voltage adjusting module adjusting the fourth voltage according to the control signal to generate a fifth voltage and outputting the fifth voltage to the display panel, and the application shortens the screen response time.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a driving circuit, driving method, and display device for a display panel. Background Technology

[0002] Currently, the response time of a monitor is the time required between the input signal and the actual output image, reflecting the monitor's processing speed of the input signal. For example, when switching screens, the response time can be the time it takes for the monitor's liquid crystal particles to change from dark to bright or from bright to dark. The monitor's refresh time is the interval between two adjacent frames. When the response time is greater than the refresh time, the previous frame of the monitor has not been fully rendered before another frame arrives. At this time, the rendered color value is less than the target value, and the monitor will show ghosting, reducing the display effect. Summary of the Invention

[0003] The purpose of this invention is to provide a driving circuit, driving method, and display device for a display panel, thereby improving the problem of long screen response time.

[0004] To achieve the objectives of this invention, the following technical solution is provided:

[0005] In a first aspect, the present invention provides a driving circuit for a display panel, the driving circuit comprising a driving module, a feedback module, an operational amplifier, a screen driving module, and a voltage adjustment module. The operational amplifier includes a first input terminal, a second input terminal, and an output terminal. One end of the feedback module is connected to the second input terminal, and the other end of the feedback module is connected to the output terminal. The output terminal is also connected to the voltage adjustment module, and the voltage adjustment module is also connected to the screen driving module and the display panel. The driving module is connected to the first input terminal. The driving module is used to transmit a first voltage to the first input terminal. The screen driving module is used to acquire a low-voltage differential signal and process the low-voltage differential signal to generate a control signal. Specifically: the operational amplifier is used to generate a second voltage at the output terminal based on the first voltage; the feedback module is used to adjust the second voltage to generate a third voltage, and the feedback module is also used to transmit the third voltage to the second input terminal. The operational amplifier is also used to adjust the second voltage based on the magnitudes of the first voltage and the third voltage to generate a fourth voltage; the voltage adjustment module is used to adjust the fourth voltage according to the control signal to generate a fifth voltage and output the fifth voltage to the display panel.

[0006] The second voltage is adjusted by the control feedback module to generate a third voltage, and the third voltage is transmitted to the second input terminal through the feedback module. The operational amplifier is controlled to adjust the second voltage according to the magnitude of the first voltage and the third voltage to generate a fourth voltage. The voltage adjustment module is controlled to adjust the fourth voltage according to the control signal to generate a fifth voltage and output the fifth voltage to the display panel. This driving circuit can quickly respond to changes in the first voltage, achieve overdrive compensation, improve screen response time, and improve charging efficiency. Moreover, this driving circuit realizes dynamic compensation under different states, which speeds up the screen's response speed to signal changes and shortens the screen response time.

[0007] In conjunction with the first aspect, in one possible example, the feedback module includes a first capacitor, a second capacitor, a third capacitor, a first resistor, and a second resistor. One end of the first resistor is connected to the output terminal, one end of the second capacitor, and one end of the voltage adjustment module. The other end of the first resistor is connected to one end of the first capacitor and one end of the second resistor. The other end of the first capacitor is grounded. The other end of the second resistor is connected to the other end of the second capacitor, one end of the third capacitor, and the second input terminal. The other end of the third capacitor is grounded.

[0008] In this embodiment, the feedback module uses a phase-shift circuit network composed of resistors and capacitors. This phase-shift circuit network has the characteristics of fast charging and discharging, and can quickly respond to changes in the second voltage. The first capacitor, the second capacitor, and the third capacitor can quickly store or release charge, while the resistor limits the current, so that the feedback signal can be pulled up or down in a short time, thereby accelerating the screen's response speed to signal changes, improving charging efficiency, and shortening the time for the screen to display a new image.

[0009] In conjunction with the first aspect, in one possible example, the voltage adjustment module further includes a first adjustment resistor, a second adjustment resistor, a third adjustment resistor, a fourth adjustment resistor, a fifth adjustment resistor, a first branch, a second branch, a third branch, a fourth branch, and a fifth branch. One end of the first adjustment resistor is connected to the other end of the feedback module and the output terminal. The other end of the first adjustment resistor is connected to one end of the first branch and one end of the second adjustment resistor. The other end of the second adjustment resistor is connected to one end of the second branch and one end of the third adjustment resistor. The other end of the third adjustment resistor is connected to one end of the third branch and one end of the fourth adjustment resistor. The other end of the fourth adjustment resistor is connected to one end of the fourth branch and one end of the fifth adjustment resistor. The other end of the fifth adjustment resistor is connected to one end of the fifth branch. The other ends of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch are all connected to the display panel.

[0010] According to the control signal, the voltage adjustment module controls one of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch to be turned on, while the other four branches are turned off.

[0011] In this embodiment, the voltage adjustment module includes multiple branches and multiple adjustment resistors. This design allows the screen driver module to quickly select the appropriate branch for conduction or disconnection. Furthermore, each branch can independently control the current flow, enabling the voltage adjustment module to precisely allocate current according to the screen's actual needs. The screen driver module rapidly sends control signals to the corresponding branch based on different needs, allowing the adjustment resistors in that branch to quickly adjust the current magnitude. Moreover, the voltage adjustment module can quickly switch between different branch combinations to achieve rapid adjustment of the fourth voltage, ensuring the screen can respond quickly to these changes, thereby shortening the screen's response time and improving the display effect.

[0012] In conjunction with the first aspect, in one possible example, the first branch includes a first group of transistors, the second branch includes a second group of transistors, the third branch includes a third group of transistors, the fourth branch includes a fourth group of transistors, and the fifth branch includes a fifth group of transistors. The gates of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors are all connected to the screen driving module.

[0013] The screen driving module is also used to control the on and off states of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors.

[0014] In this embodiment, the screen driver module can flexibly select different combinations of transistors to turn on or off according to different brightness settings or different display content of the screen. Each branch consists of a group of transistors. When the screen driver module sends a control signal, multiple groups of transistors can respond simultaneously and quickly enter the on or off state. This parallel working mode greatly improves the overall response speed of the voltage adjustment module.

[0015] In conjunction with the first aspect, in one possible example, the first group of transistors includes a first transistor, a second transistor, and a third transistor. The source of the first transistor is connected to the other end of the first adjusting resistor and one end of the second branch. The drain of the first transistor is connected to the source of the second transistor. The drain of the second transistor is connected to the source of the third transistor. The drain of the third transistor is connected to the other end of the second branch. The gate of the first transistor is connected to the screen driving module. The gate of the second transistor is connected to the screen driving module. The gate of the third transistor is connected to the screen driving module.

[0016] The control signal includes a first signal, a second signal, and a third signal. The first signal is used to control the on and off states of the first transistor, the second signal is used to control the on and off states of the second transistor, and the third signal is used to control the on and off states of the third transistor.

[0017] In this embodiment, the screen driver module can precisely adjust the conduction level of the three transistors by accurately controlling the first signal, the second signal and the third signal, thereby achieving precise control of the branch current. This precise control method enables the screen to provide appropriate brightness in various scenarios, meet the user's visual needs, and improve the accuracy of brightness control.

[0018] In conjunction with the first aspect, in one possible example, the voltage adjustment module further includes a first compensation capacitor, a second compensation capacitor, a third compensation capacitor, a fourth compensation capacitor, and a fifth compensation capacitor. One end of the first compensation capacitor is connected to the other end of the first adjusting resistor, one end of the second adjusting resistor, and one end of the first branch, and the other end of the first compensation capacitor is grounded. One end of the second compensation capacitor is connected to the other end of the second adjusting resistor, one end of the third adjusting resistor, and one end of the second branch, and the other end of the second compensation capacitor is grounded. One end of the third compensation capacitor is connected to the other end of the third adjusting resistor, one end of the fourth adjusting resistor, and one end of the third branch, and the other end of the third compensation capacitor is grounded. One end of the fourth compensation capacitor is connected to the other end of the fourth adjusting resistor, one end of the fifth adjusting resistor, and one end of the fourth branch, and the other end of the fourth compensation capacitor is grounded. One end of the fifth compensation capacitor is connected to the other end of the fifth adjusting resistor and one end of the fifth branch, and the other end of the fifth compensation capacitor is grounded.

[0019] In this embodiment, the first, second, third, fourth, and fifth compensation capacitors can quickly store and release charge when the voltage adjustment module is working, assisting the voltage adjustment module to reach a new stable output voltage state more quickly, thereby speeding up the screen response speed and shortening the time for the screen to display a new image.

[0020] Secondly, this application provides a driving method applied to a driving circuit of a display panel. The driving circuit includes a driving module, a feedback module, an operational amplifier, a screen driving module, and a voltage adjustment module. The operational amplifier includes a first input terminal, a second input terminal, and an output terminal. One end of the feedback module is connected to the second input terminal, and the other end is connected to the output terminal. The output terminal is also connected to the voltage adjustment module, which is further connected to the screen driving module and the display panel. The driving module is connected to the first input terminal and is used to transmit a first voltage to the first input terminal. The screen driving module is used to acquire a low-voltage differential signal and process the low-voltage differential signal to generate a control signal, wherein: based on the first voltage, the operational amplifier is controlled to generate a second voltage at the output terminal; the feedback module is controlled to adjust the second voltage to generate a third voltage, and the third voltage is transmitted to the second input terminal through the feedback module; the operational amplifier is controlled to adjust the second voltage based on the magnitude of the first voltage and the third voltage to generate a fourth voltage; and the voltage adjustment module is controlled to adjust the fourth voltage based on the control signal to generate a fifth voltage and output the fifth voltage to the display panel.

[0021] In conjunction with the second aspect, in one possible example, the feedback module includes a first capacitor, a second capacitor, a third capacitor, a first resistor, and a second resistor. One end of the first resistor is connected to the output terminal, one end of the second capacitor, and one end of the voltage adjustment module. The other end of the first resistor is connected to one end of the first capacitor and one end of the second resistor. The other end of the first capacitor is grounded. The other end of the second resistor is connected to the other end of the second capacitor, one end of the third capacitor, and the second input terminal. The other end of the third capacitor is grounded.

[0022] In conjunction with the second aspect, in one possible example, the voltage adjustment module further includes a first adjustment resistor, a second adjustment resistor, a third adjustment resistor, a fourth adjustment resistor, a fifth adjustment resistor, a first branch, a second branch, a third branch, a fourth branch, and a fifth branch. One end of the first adjustment resistor is connected to the other end of the feedback module and the output terminal. The other end of the first adjustment resistor is connected to one end of the first branch and one end of the second adjustment resistor. The other end of the second adjustment resistor is connected to one end of the second branch and one end of the third adjustment resistor. The other end of the third adjustment resistor is connected to one end of the third branch and one end of the fourth adjustment resistor. The other end of the fourth adjustment resistor is connected to one end of the fourth branch and one end of the fifth adjustment resistor. The other end of the fifth adjustment resistor is connected to one end of the fifth branch. The other ends of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch are all connected to the display panel.

[0023] According to the control signal, the voltage adjustment module controls one of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch to be turned on, while the other four branches are turned off.

[0024] Thirdly, this application provides a display device including a display panel and a driving circuit, wherein the display panel is electrically connected to the driving circuit, and the driving circuit is used to perform the method provided in the second aspect or any embodiment of the second aspect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is an application scenario diagram of a display device according to one embodiment;

[0027] Figure 2 This is a partial structural schematic diagram of a driving circuit according to one embodiment;

[0028] Figure 3 This is a flowchart illustrating a driving method of one embodiment;

[0029] Figure 4 This is a schematic diagram of the structure of a display device according to one embodiment.

[0030] Explanation of reference numerals in the attached figures:

[0031] 101-User, 102-Display device, 103-Server, 20-Drive circuit, 21-Feedback module, 211-First capacitor, 212-Second capacitor, 213-Third capacitor, 214-First resistor, 215-Second resistor, 22-Operational amplifier, 221-First input terminal, 222-Second input terminal, 223-Output terminal, 23-Voltage adjustment module, 231-First adjustment resistor, 232-Second adjustment resistor, 233-Third adjustment resistor, 23 4-Fourth adjusting resistor, 235-Fifth adjusting resistor, 236-First branch, 2361-First transistor, 2362-Second transistor, 2363-Third transistor, 237-Second branch, 238-Third branch, 239-Fourth branch, 24-Fifth branch, 251-First compensation capacitor, 252-Second compensation capacitor, 253-Third compensation capacitor, 254-Fourth compensation capacitor, 255-Fifth compensation capacitor, 26-First port, 27-Display panel. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0034] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0035] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] Please see Figure 1 , Figure 1 This is an application scenario diagram of a display device provided in this application. For example... Figure 1 As shown in the diagram, this application scenario includes user 101, display device 102, and server 103. It should be noted that... Figure 1 The number of devices, the form of each device, and the number of users in the system shown are for illustrative purposes only and do not constitute a limitation of this application. A user can use multiple display devices 102, and a server 103 can be connected to multiple display devices 102. The server 103 transmits data to the display devices 102, and the display devices 102 can display the data.

[0037] User 101 is the user who actually operates the display device 102 to control it to perform corresponding operations. The display device 102 can be... Figure 1 The laptop shown can also be a personal computer (PC), all-in-one computer, handheld computer, tablet computer, desktop computer, smartphone, smart TV playback terminal, and portable device. PC-based electronic devices, such as all-in-one computers, can have operating systems including, but not limited to, Linux, Unix, and Windows series systems (such as Windows XP and Windows 7). Mobile electronic devices, such as smartphones, can have operating systems including, but not limited to, Android, iOS (Apple's operating system), and Windows.

[0038] Please see Figure 2 , Figure 2 This is a partial structural schematic diagram of a driving circuit 20 provided in this application. Figure 2As shown, the driving circuit 20 includes a feedback module 21, an operational amplifier 22, and a voltage adjustment module 23. The driving circuit 20 also includes a driving module and a screen driving module. The operational amplifier 22 includes a first input terminal 221, a second input terminal 222, and an output terminal 223. One end of the feedback module 21 is connected to the second input terminal 222, and the other end of the feedback module 21 is connected to the output terminal 223. The output terminal 223 is also connected to the voltage adjustment module 23. The voltage adjustment module 23 is also connected to the screen driving module and the display panel 27. The driving module is connected to the first input terminal 221 and is used to transmit a first voltage to the first input terminal 221. The screen driving module is used to acquire a low-voltage differential signal and process the low-voltage differential signal to generate a control signal.

[0039] Optionally, the driving circuit 20 further includes a first auxiliary capacitor and a first auxiliary resistor. One end of the first auxiliary capacitor is connected to one end of the first auxiliary resistor and to the first input terminal 221. The other end of the first auxiliary capacitor is grounded, and the other end of the first auxiliary resistor is connected to the driving module.

[0040] In one embodiment, the feedback module 21 includes a first capacitor 211, a second capacitor 212, a third capacitor 213, a first resistor 214, and a second resistor 215. One end of the first resistor 214 is connected to the output terminal 223, one end of the second capacitor 212, and one end of the voltage adjustment module 23. The other end of the first resistor 214 is connected to one end of the first capacitor 211 and one end of the second resistor 215. The other end of the first capacitor 211 is grounded. The other end of the second resistor 215 is connected to the other end of the second capacitor 212, one end of the third capacitor 213, and the second input terminal 222. The other end of the third capacitor 213 is grounded.

[0041] Optionally, the selection of the first resistor 214 and the second resistor 215 can be determined based on the output impedance of the operational amplifier 22 and the total impedance required by the feedback network. Through calculation and matching, a suitable first resistor 214 and second resistor 215 can be selected so that the impedance of the entire feedback module 21 falls within this range, so as to ensure the stability and accuracy of the operational amplifier 22, while avoiding the introduction of too much noise and error.

[0042] Optionally, the selection of capacitance values ​​for the first capacitor 211, the second capacitor 212, and the third capacitor 213 needs to consider the frequency characteristics of the signal and the time constant of the feedback module 21. Assuming the driving circuit 20 primarily processes high-frequency signals, the capacitance values ​​of the first capacitor 211, the second capacitor 212, and the third capacitor 213 can be appropriately reduced to make the time constant less than the signal period, thereby reducing phase distortion of the signal. Assuming the driving circuit 20 primarily processes low-frequency signals, the capacitance values ​​should be increased accordingly to ensure the signal can pass smoothly through the feedback module 21, achieving effective voltage feedback regulation. Optionally, the parameters of the feedback module 21 need to be adjusted accordingly for different types of display panels 27. For example, for an LED-type display panel 27, which has high requirements for the accuracy and stability of the driving voltage, the capacitance values ​​of the first capacitor 211, the second capacitor 212, and the third capacitor 213 in the feedback module 21 can be appropriately increased to enhance the filtering effect on voltage fluctuations. For a traditional LCD screen, the capacitance values ​​of the first capacitor 211, the second capacitor 212, and the third capacitor 213 in the feedback module 21 can be appropriately decreased to improve the feedback response speed and adapt to its relatively low refresh rate requirements.

[0043] Optionally, to further improve the stability of the feedback module 21, a small Zener diode can be connected in parallel with the first resistor 214 and the second resistor 215. When a transient overvoltage occurs in the circuit, the Zener diode can conduct in time to control the overvoltage within a safe range, protecting the subsequent operational amplifier 22 and voltage adjustment module 23 from damage, while avoiding abnormal fluctuations in the feedback signal caused by overvoltage.

[0044] Optionally, considering the influence of temperature on the resistance and capacitance parameters, materials with low temperature coefficients should be selected when choosing components. For example, metal film resistors can be used for the first resistor 214 and the second resistor 215; while high-stability ceramic capacitors or multilayer chip capacitors are used for the first capacitor 211, the second capacitor 212, and the third capacitor 213, and their temperature coefficients are also relatively low, thereby ensuring that the performance of the feedback module 21 remains stable under different operating temperature environments.

[0045] It should be noted that during the circuit debugging process of the drive circuit 20, an oscilloscope can be used to test the key nodes of the feedback module 21. For example, by observing the voltage waveform across the first resistor 214, the magnitude and stability of the feedback signal can be determined; by detecting the voltage changes across the second capacitor 212 and the third capacitor 213, it can be analyzed whether the filtering effect has reached the expected level. Based on the test results, the values ​​of the resistors and capacitors in the feedback module 21 can be fine-tuned until the performance of the feedback module 21 meets the design requirements.

[0046] For example, when the second voltage suddenly rises or falls, the capacitor can quickly store or release charge, while the resistor limits the current, allowing the feedback signal to stabilize in a short time. This speeds up the screen's response to signal changes and shortens the time it takes for the screen to display a new image.

[0047] Specifically, since the feedback module 21 uses a phase-shift circuit network composed of resistors and capacitors, this phase-shift circuit network has the characteristics of fast charging and discharging, and can quickly respond to changes in the second voltage. The first capacitor 211, the second capacitor 212 and the third capacitor 213 can quickly store or release charge, while the resistor limits the current, so that the feedback signal can be pulled up or down in a short time, thereby accelerating the screen's response speed to signal changes, improving charging efficiency and shortening the time for the screen to display a new image.

[0048] In one implementation, such as Figure 2 As shown, the voltage adjustment module 23 also includes a first adjustment resistor 231, a second adjustment resistor 232, a third adjustment resistor 233, a fourth adjustment resistor 234, a fifth adjustment resistor 235, a first branch 236, a second branch 237, a third branch 238, a fourth branch 239, and a fifth branch 24. One end of the first adjustment resistor 231 is connected to the other end of the feedback module 21 and the output terminal 223. The other end of the first adjustment resistor 231 is connected to one end of the first branch 236 and one end of the second adjustment resistor 232. The other end of the second adjustment resistor 232 is connected to one end of the second branch 237 and one end of the third adjustment resistor 233. The other end of the third adjustment resistor 233 is connected to the third branch 236 and one end of the second branch 237. One end of branch 238 is connected to one end of the fourth adjusting resistor 234. The other end of the fourth adjusting resistor 234 is connected to one end of the fourth branch 239 and one end of the fifth adjusting resistor 235. The other end of the fifth adjusting resistor 235 is connected to one end of the fifth branch 24. The other ends of the first branch 236, the second branch 237, the third branch 238, the fourth branch 239, and the fifth branch 24 are all connected to the display panel 27. According to the control signal, the voltage adjustment module 23 controls one of the first branch 236, the second branch 237, the third branch 238, the fourth branch 239, and the fifth branch 24 to be turned on, while the other four branches are turned off.

[0049] Optionally, the screen driver module includes a mode detection function submodule. This submodule generates control signals based on the timing and data information of the low-voltage differential signal. For example, to meet different display resolution and refresh rate requirements, the logic circuitry within the mode detection function submodule parses the synchronization information and data packet header in the low-voltage differential signal, generating corresponding first, second, and third signals. These signals are output with specific timing and voltage amplitude to control one of the control branches 236, 237, 238, 239, and 24 in the voltage adjustment module 23 to be turned on, while the other four branches are turned off.

[0050] Optionally, in the voltage adjustment module 23, the configuration of the first branch 236, the second branch 237, the third branch 238, the fourth branch 239, and the fifth branch 24 can be matched to the pixel array structure of the display panel 27. For example, for a display panel 27 with different brightness areas, the first branch 236, the second branch 237, the third branch 238, the fourth branch 239, and the fifth branch 24 can each correspond to a different brightness area. When it is necessary to increase the brightness of a certain area, the control signal turns on the corresponding branch, allowing more current to flow through the pixels in that area, thereby achieving local brightness enhancement. In specific implementations, by precisely controlling the conduction time and current magnitude of each branch, precise brightness adjustment can be performed on different areas of the display panel 27 to meet requirements such as high dynamic range displays. Optionally, the voltage adjustment module 23 may also include more branches to adapt to different grayscale levels.

[0051] Optionally, the selection of the resistance values ​​of the first adjustment resistor 231, the second adjustment resistor 232, the third adjustment resistor 233, the fourth adjustment resistor 234, and the fifth adjustment resistor 235 needs to be designed by comprehensively considering the output capability of the operational amplifier 22 and the voltage range required by the display panel 27. At the same time, considering the voltage drop when each branch is turned on and the influence of the feedback module 21, the resistance values ​​are finely adjusted to ensure that the fifth voltage output to the display panel 27 is accurate and stable, meeting its performance requirements in different operating modes.

[0052] Optionally, the transistors in the first branch 236, the second branch 237, the third branch 238, the fourth branch 239, and the fifth branch 24 can be of different types to adapt to different operating conditions. For example, in scenarios requiring rapid switching of branch conduction states, gallium nitride transistors are used, which feature high electron mobility and low on-resistance, enabling rapid response to control signals and instantaneous switching of the branch on or off. In cost-sensitive applications, ordinary metal-oxide-semiconductor field-effect transistors can be selected, and the branch control requirements can also be met by optimizing the design of the drive circuit 20. In specific designs, the appropriate transistor type is selected by comprehensively weighing factors such as the update frequency of the display panel 27, response speed requirements, and system cost budget.

[0053] Optionally, to improve the anti-interference capability of the voltage adjustment module 23, filter circuits can be added to the input and output terminals 223 of each branch. For example, a filter circuit can be connected in parallel at the connection between one end of the first branch 236 and the other end of the first adjustment resistor 231. This filter circuit consists of an inductor and a capacitor, and the parameters of the inductor and capacitor can be designed according to the expected interference frequency to be filtered out. When external electromagnetic interference intrudes, the filter circuit can effectively suppress the interference signal, ensuring that the voltage transmitted in the branch is pure and stable, thereby ensuring that the display panel 27 receives an accurate driving voltage and avoiding display abnormalities caused by interference, such as flickering or color deviation.

[0054] Specifically, in this embodiment, the voltage adjustment module 23 includes multiple branches and multiple adjustment resistors. This design allows the screen driver module to quickly select appropriate branches for conduction or disconnection. Furthermore, each branch can independently control the current flow, enabling the voltage adjustment module 23 to precisely allocate current according to the actual needs of the screen. The screen driver module quickly sends control signals to the corresponding branches based on different actual needs, allowing the adjustment resistors in the branches to quickly adjust the current magnitude. Moreover, the voltage adjustment module 23 can quickly switch between different branch combinations to achieve rapid adjustment of the fourth voltage, ensuring the screen can quickly respond to these changes, thereby shortening the screen response time and improving the display effect.

[0055] In one embodiment, the first branch 236 includes a first group of transistors, the second branch 237 includes a second group of transistors, the third branch 238 includes a third group of transistors, the fourth branch 239 includes a fourth group of transistors, and the fifth branch 24 includes a fifth group of transistors. The gates of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors are all connected to the screen driving module.

[0056] The screen driver module is also used to control the on / off state of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors.

[0057] Optionally, the screen driver module controls the conduction and cutoff of the first, second, third, fourth, and fifth groups of transistors by outputting specific pulse width modulation (PWM) signals. For example, for the first group of transistors, the screen driver module generates a first PWM signal with a frequency of f1 and a duty cycle of d1, which is connected to the gate of the first group of transistors. When the first PWM signal is high, the first group of transistors is turned on, and the first branch 236 is connected; when the first PWM signal is low, the first group of transistors is turned off, and the first branch 236 is disconnected. Similarly, for the other groups of transistors, corresponding PWM signals are generated. By adjusting the duty cycle and frequency, the conduction time and current magnitude in the first branch 236, second branch 237, third branch 238, fourth branch 239, and fifth branch 24 are precisely controlled, thereby achieving precise adjustment of the brightness of different areas of the display panel 27.

[0058] Optionally, multiplexing technology can be used to optimize the connection between the screen driver module and multiple groups of transistors. For example, a multiplexer can be designed with its input connected to multiple control signal outputs 223 of the screen driver module, and the outputs 223 connected to the gates of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors, respectively. By controlling the selection signal of the multiplexer, the control signals of the screen driver module can be sequentially distributed to different groups of transistors. This method reduces the number of output pins required by the screen driver module without reducing control accuracy, simplifies circuit design, and is suitable for complex driver circuits 20 with a large number of branches.

[0059] Optionally, a digital control algorithm can be implemented in the screen driver module to precisely manage the on and off states of each group of transistors. For example, the screen driver module based on a digital signal processor runs a brightness adjustment algorithm that calculates the required on-time and current amplitude for each branch based on the real-time requirements of the displayed content and the ambient light intensity. Then, these calculation results are converted into corresponding control signals and sent to the gates of each group of transistors. In this way, the system can dynamically adjust the brightness distribution of the display panel 27, improving display quality while reducing power consumption.

[0060] Optionally, metal-oxide-semiconductor (MOSFETs) can be selected to form each group of transistors. These transistors have extremely high gate input impedance, requiring only a small control current from the screen driver module to drive them. This allows for a simpler design of the output drive circuit 20, reducing power consumption and heat generation. Furthermore, the fast switching speed of MOSFETs meets the requirements of high refresh rate display panels 27, ensuring smooth image display.

[0061] Specifically, each branch consists of a group of transistors. When the screen driver module sends a control signal, multiple groups of transistors can respond simultaneously, quickly entering the on or off state. This parallel operation mode greatly improves the overall response speed of the voltage adjustment module 23. For example, when the screen needs to quickly increase brightness, the screen driver module simultaneously sends on signals to the transistor groups of multiple branches, and multiple branches start working at the same time, rapidly increasing the output current, thereby enabling the screen to respond to brightness changes more quickly and shortening the time for the screen to display a new image.

[0062] In one embodiment, the first group of transistors includes a first transistor 2361, a second transistor 2362, and a third transistor 2363. The source of the first transistor 2361 is connected to the other end of the first adjusting resistor 231 and one end of the second branch 237. The drain of the first transistor 2361 is connected to the source of the second transistor 2362. The drain of the second transistor 2362 is connected to the source of the third transistor 2363. The drain of the third transistor 2363 is connected to the other end of the second branch 237. The gate of the first transistor 2361 is connected to the screen driving module. The gate of the second transistor 2362 is connected to the screen driving module. The gate of the third transistor 2363 is connected to the screen driving module.

[0063] The control signals include a first signal, a second signal, and a third signal. The first signal is used to control the on and off state of the first transistor 2361, the second signal is used to control the on and off state of the second transistor 2362, and the third signal is used to control the on and off state of the third transistor 2363.

[0064] Optionally, the screen driving module includes a synchronous timing controller, which generates a first signal, a second signal, and a third signal. The timing of these signals is strictly synchronized with the refresh cycle of the display panel 27. For example, at the beginning of each frame of image display, the synchronous timing controller triggers the first signal to turn on the first transistor 2361, establishing a preliminary circuit path. Subsequently, according to the processing progress of the image data, the second and third signals are triggered sequentially to control the on and off states of the second transistor 2362 and the third transistor 2363, ensuring that during the refresh process of the display panel 27, the voltage adjustment module 23 can accurately output the required voltage, synchronized with the changes in the displayed content, achieving a flicker-free and delay-free display effect.

[0065] Optionally, appropriate transistor types can be selected based on different application requirements. For high-resolution and large-size display panels 27, a larger drive current is required, in which case power transistors with high voltage withstand capability and strong current carrying capacity can be selected. The parameters of the first transistor 2361, the second transistor 2362, and the third transistor 2363 must be matched to ensure that there are no current surges or voltage glitches when they are turned on and off. For example, their on-resistance should be similar, their voltage withstand value should be higher than the maximum voltage that may occur in the circuit, and their gate threshold voltage should be within the control range of the output signal of the screen driver module to ensure stable operation and precise control of the transistors.

[0066] Optionally, the second, third, fourth, and fifth branches have the same structure as the first branch, and each branch includes three transistors, with the gate of each transistor connected to the screen driver module.

[0067] Optionally, the screen driver module controls multiple groups of transistors simultaneously. Except for the first group, the other groups also employ a similar three-stage transistor structure. During control, the screen driver module independently adjusts the control signals for each group of transistors based on the brightness requirements of different areas of the display panel 27. For example, when the central area of ​​the display panel 27 requires high brightness, the screen driver module sends high-duty-cycle first, second, and third signals to fully conduct the three transistors in the corresponding branch of that central area, providing a larger current. Conversely, for edge areas with lower brightness requirements, the duty cycle of the control signals is reduced accordingly, decreasing current output and achieving zoned brightness adjustment of the display panel 27, thereby improving display contrast and energy efficiency.

[0068] Optionally, the screen driver module also includes a microcontroller. The microcontroller is at its core, enabling precise control of three transistors through programming. The microcontroller runs a control algorithm that calculates the required conduction time for each transistor based on the input image data and preset display parameters. For example, for dynamic video content, the microcontroller can analyze the motion information of each frame in real time and adjust the output timing of the first, second, and third signals in advance, ensuring that the transistors' on / off states are synchronized with the image movement, effectively reducing motion blur and improving display quality. The microcontroller can also fine-tune the control signals through a feedback mechanism based on the actual current and voltage of the display panel 27, ensuring the stability of the output voltage.

[0069] Optionally, the screen driver module combines analog and digital circuits to control the transistors. The digital circuitry generates precise timing signals and logic control signals to determine the transistor's on and off times. The analog circuitry amplifies and levels the control signals to meet the driving requirements of the transistor gate. For example, the digital circuit generates a square wave signal as the first signal. After being amplified and filtered by the operational amplifier 22 in the analog circuit, a stable, appropriately amplitude driving signal is output to the gate of the first transistor 2361, ensuring that the transistor can operate stably in both on and off states, thus improving the control accuracy and stability of the entire circuit.

[0070] Optionally, the operational amplifier 22 also includes a first port 26, which is used to provide a stable power supply voltage for the analog section. Its main function is to provide power to the analog signal processing circuit.

[0071] Specifically, the screen driver module can precisely adjust the conduction level of the three transistors by accurately controlling the first, second, and third signals, thereby achieving precise control of the branch current. This precise control method enables the screen to provide appropriate brightness in various scenarios, meet the user's visual needs, and improve the accuracy of brightness control.

[0072] In one embodiment, the voltage adjustment module 23 further includes a first compensation capacitor 251, a second compensation capacitor 252, a third compensation capacitor 253, a fourth compensation capacitor 254, and a fifth compensation capacitor 255. One end of the first compensation capacitor 251 is connected to the other end of the first adjustment resistor 231, one end of the second adjustment resistor 232, and one end of the first branch 236. The other end of the first compensation capacitor 251 is grounded. One end of the second compensation capacitor 252 is connected to the other end of the second adjustment resistor 232, one end of the third adjustment resistor 233, and one end of the second branch 237. The second compensation capacitor 254... The other end of 2 is grounded. One end of the third compensation capacitor 253 is connected to the other end of the third adjustment resistor 233, one end of the fourth adjustment resistor 234, and one end of the third branch 238. The other end of the third compensation capacitor 253 is grounded. One end of the fourth compensation capacitor 254 is connected to the other end of the fourth adjustment resistor 234, one end of the fifth adjustment resistor 235, and one end of the fourth branch 239. The other end of the fourth compensation capacitor 254 is grounded. One end of the fifth compensation capacitor 255 is connected to the other end of the fifth adjustment resistor 235 and one end of the fifth branch 24. The other end of the fifth compensation capacitor 255 is grounded.

[0073] Optionally, when designing the voltage adjustment module 23, the capacitance values ​​of the first compensation capacitor 251, the second compensation capacitor 252, the third compensation capacitor 253, the fourth compensation capacitor 254, and the fifth compensation capacitor 255 are precisely selected according to different usage scenarios. For example, in the drive circuit 20 that processes high-frequency signals, the capacitance value of the compensation capacitors should be appropriately increased to reduce high-frequency noise interference. For instance, when a larger capacitance value is selected for the first compensation capacitor 251, high-frequency noise can be effectively filtered out, ensuring the stability and purity of the output voltage of the voltage adjustment module 23 when it operates at high frequencies, thus meeting the requirements of the high-definition, fast-refresh display panel 27.

[0074] Optionally, based on the different requirements of the driving circuit 20, the withstand voltage values ​​of the first compensation capacitor 251, the second compensation capacitor 252, the third compensation capacitor 253, the fourth compensation capacitor 254, and the fifth compensation capacitor 255 can be reasonably planned. The withstand voltage requirements of the compensation capacitors are evaluated based on the maximum voltage of the voltage adjustment module 23 during operation. For example, for the fifth compensation capacitor 255, if the voltage adjustment module 23's maximum voltage under extreme conditions can reach 20V, to ensure safety and stability, a compensation capacitor with a withstand voltage of 25V or higher should be selected. This ensures that the compensation capacitors will not be damaged by overvoltage during circuit operation, extending their service life, while also ensuring the normal operation of the voltage adjustment module 23 and the stability of the display effect.

[0075] Optionally, the first compensation capacitor 251, the second compensation capacitor 252, the third compensation capacitor 253, the fourth compensation capacitor 254, and the fifth compensation capacitor 255 can be multilayer ceramic capacitors with low temperature coefficients. These capacitors exhibit minimal capacitance changes over a wide temperature range of -40°C to 85°C, ensuring the voltage adjustment module 23 operates normally in both cold winters and hot summers. In contrast, for display devices operating in constant indoor temperatures, lower-cost ordinary ceramic capacitors can be selected to meet the needs of daily temperature variations and ensure the display quality of the display panel 27 under different environments.

[0076] Optionally, the filtering function of the voltage adjustment module 23 can be upgraded through compensation capacitors. When the voltage adjustment module 23 is working, the compensation capacitors work together to filter out noise in different frequency bands. The first compensation capacitor 251 mainly filters out noise in the higher frequency band, the second compensation capacitor 252 targets slightly lower frequency bands, and so on. The fifth compensation capacitor 255 suppresses noise in the lowest frequency band. They form a multi-stage filtering network, which effectively reduces the output voltage ripple, makes the voltage output to the display panel 27 purer, improves the stability and color uniformity of the display image, and reduces problems such as screen flickering and color deviation caused by voltage fluctuations.

[0077] Optionally, the first compensation capacitor 251, the second compensation capacitor 252, the third compensation capacitor 253, the fourth compensation capacitor 254, and the fifth compensation capacitor 255 can be ordinary ceramic capacitors or film capacitors, etc.

[0078] Optionally, by combining the first compensation capacitor 251, the second compensation capacitor 252, the third compensation capacitor 253, the fourth compensation capacitor 254, and the fifth compensation capacitor 255, the transient response of the voltage adjustment module 23 can be optimized. When a sudden load change occurs in the driving circuit 20 of the display panel 27, such as switching from a completely black screen to a completely white screen, the voltage adjustment module 23 can respond quickly. The compensation capacitors play a crucial role in this process. Taking the first compensation capacitor 251 as an example, its stored charge can be released instantaneously, providing additional current to the circuit and helping the voltage adjustment module 23 quickly stabilize the output voltage. By reasonably designing the parameters of the compensation capacitors, the voltage adjustment module 23 can restore stable output in a short time, ensuring that the display panel 27 is flicker-free and delay-free when switching screens, thus improving the user experience.

[0079] For example, when the screen needs to switch from low brightness to high brightness, the compensation capacitor can release the stored charge in a short time, helping the voltage adjustment module 23 to quickly increase the fourth voltage, thereby speeding up the screen response and shortening the time it takes for the screen to display a new image.

[0080] Specifically, the first compensation capacitor 251, the second compensation capacitor 252, the third compensation capacitor 253, the fourth compensation capacitor 254, and the fifth compensation capacitor 255 can quickly store and release charge to adjust the fourth voltage when the voltage adjustment module 23 is working. When the screen driving module needs to adjust the fourth voltage, the compensation capacitors can quickly provide or absorb charge, assisting the voltage adjustment module 23 to reach a new stable output voltage state more quickly.

[0081] Please see Figure 3 , Figure 3 This is a flowchart illustrating a driving method provided in this application. The driving method is applied to a driving circuit 20 of a display panel 27. The driving circuit 20 includes a driving module, a feedback module 21, an operational amplifier 22, a screen driving module, and a voltage adjustment module 23. The operational amplifier 22 includes a first input terminal 221, a second input terminal 222, and an output terminal 223. One end of the feedback module 21 is connected to the second input terminal 222, and the other end of the feedback module 21 is connected to the output terminal 223. The output terminal 223 is also connected to the voltage adjustment module 23, which is also connected to the screen driving module and the display panel 27. The driving module is connected to the first input terminal 221 and is used to transmit a first voltage to the first input terminal 221. The screen driving module is used to acquire a low-voltage differential signal and process the low-voltage differential signal to generate a control signal, such as... Figure 3As shown, the driving method includes steps S301 to S304:

[0082] S301: Based on the first voltage, control the operational amplifier 22 to generate a second voltage at the output terminal 223;

[0083] S302: The control feedback module 21 adjusts the second voltage to generate the third voltage, and transmits the third voltage to the second input terminal 222 through the feedback module 21;

[0084] S303: Control operational amplifier 22 to adjust the second voltage according to the magnitude of the first voltage and the third voltage to generate the fourth voltage;

[0085] S304: The control voltage adjustment module 23 adjusts the fourth voltage according to the control signal to generate the fifth voltage and outputs the fifth voltage to the display panel 27.

[0086] The second voltage is adjusted by the control feedback module 21 to generate a third voltage, and the third voltage is transmitted to the second input terminal 222 through the feedback module 21. The operational amplifier 22 is controlled to adjust the second voltage according to the magnitude of the first voltage and the third voltage to generate a fourth voltage. The voltage adjustment module 23 is controlled to adjust the fourth voltage according to the control signal to generate a fifth voltage and output the fifth voltage to the display panel 27. This driving circuit 20 can quickly respond to changes in the first voltage, achieve overdrive compensation, improve screen response time, and improve charging efficiency. Moreover, this driving circuit 20 realizes dynamic compensation under different states, speeds up the screen's response speed to signal changes, and shortens the time for the screen to display a new image.

[0087] In one embodiment, the voltage adjustment module 23 further includes a first adjustment resistor 231, a second adjustment resistor 232, a third adjustment resistor 233, a fourth adjustment resistor 234, a fifth adjustment resistor 235, a first branch 236, a second branch 237, a third branch 238, a fourth branch 239, and a fifth branch 24. One end of the first adjustment resistor 231 is connected to the other end of the feedback module 21, one end of the second capacitor 212, and the output terminal 223. The other end of the first adjustment resistor 231 is connected to one end of the first branch 236 and one end of the second adjustment resistor 232. One end of the first branch 236 is connected to one end of the second branch 237 and one end of the third adjusting resistor 233. The other end of the third adjusting resistor 233 is connected to one end of the third branch 238 and one end of the fourth adjusting resistor 234. The other end of the fourth adjusting resistor 234 is connected to one end of the fourth branch 239 and one end of the fifth adjusting resistor 235. The other end of the fifth adjusting resistor 235 is connected to one end of the fifth branch 24. The other ends of the first branch 236, the second branch 237, the third branch 238, the fourth branch 239, and the fifth branch 24 are all connected to the display panel 27.

[0088] According to the control signal, the voltage adjustment module 23 controls one of the first branch 236, the second branch 237, the third branch 238, the fourth branch 239 and the fifth branch 24 to be turned on, while the other four branches are turned off.

[0089] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a display device 102 provided in this application. Figure 4 As shown, the display device 102 includes a display panel 27 and a driving circuit 20. The display panel 27 is electrically connected to the driving circuit 20, and the driving circuit 20 is used to perform the driving method as described above.

[0090] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship of the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0091] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A driving circuit for a display panel, characterized in that, The driving circuit includes a driving module, a feedback module, an operational amplifier, a screen driving module, and a voltage adjustment module. The operational amplifier includes a first input terminal, a second input terminal, and an output terminal. One end of the feedback module is connected to the second input terminal, and the other end is connected to the output terminal. The output terminal is also connected to the voltage adjustment module, which is further connected to the screen driving module and the display panel. The driving module is connected to the first input terminal and is used to transmit a first voltage to the first input terminal. The screen driving module is used to acquire a low-voltage differential signal and process the low-voltage differential signal to generate a control signal, wherein: The operational amplifier is used to generate a second voltage at the output terminal based on the first voltage; The feedback module is used to adjust the second voltage to generate a third voltage. The feedback module is also used to transmit the third voltage to the second input terminal. The operational amplifier is also used to adjust the second voltage according to the magnitude of the first voltage and the third voltage to generate a fourth voltage. The voltage adjustment module is used to adjust the fourth voltage according to the control signal to generate a fifth voltage and output the fifth voltage to the display panel.

2. The driving circuit according to claim 1, characterized in that, The feedback module includes a first capacitor, a second capacitor, a third capacitor, a first resistor, and a second resistor. One end of the first resistor is connected to the output terminal, one end of the second capacitor, and one end of the voltage adjustment module. The other end of the first resistor is connected to one end of the first capacitor and one end of the second resistor. The other end of the first capacitor is grounded. The other end of the second resistor is connected to the other end of the second capacitor, one end of the third capacitor, and the second input terminal. The other end of the third capacitor is grounded.

3. The driving circuit according to claim 2, characterized in that, The voltage adjustment module further includes a first adjustment resistor, a second adjustment resistor, a third adjustment resistor, a fourth adjustment resistor, a fifth adjustment resistor, a first branch, a second branch, a third branch, a fourth branch, and a fifth branch. One end of the first adjustment resistor is connected to the other end of the feedback module and the output terminal. The other end of the first adjustment resistor is connected to one end of the first branch and one end of the second adjustment resistor. The other end of the second adjustment resistor is connected to one end of the second branch and one end of the third adjustment resistor. The other end of the third adjustment resistor is connected to one end of the third branch and one end of the fourth adjustment resistor. The other end of the fourth adjustment resistor is connected to one end of the fourth branch and one end of the fifth adjustment resistor. The other end of the fifth adjustment resistor is connected to one end of the fifth branch. The other ends of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch are all connected to the display panel. According to the control signal, the voltage adjustment module controls one of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch to be turned on, while the other four branches are turned off.

4. The driving circuit according to claim 3, characterized in that, The first branch includes a first group of transistors, the second branch includes a second group of transistors, the third branch includes a third group of transistors, the fourth branch includes a fourth group of transistors, and the fifth branch includes a fifth group of transistors. The gates of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors are all connected to the screen driving module. The screen driving module is also used to control the on and off states of the first group of transistors, the second group of transistors, the third group of transistors, the fourth group of transistors, and the fifth group of transistors.

5. The driving circuit according to claim 4, characterized in that, The first group of transistors includes a first transistor, a second transistor, and a third transistor. The source of the first transistor is connected to the other end of the first adjusting resistor and one end of the second branch. The drain of the first transistor is connected to the source of the second transistor. The drain of the second transistor is connected to the source of the third transistor. The drain of the third transistor is connected to the other end of the second branch. The gate of the first transistor is connected to the screen driving module, the gate of the second transistor is connected to the screen driving module, and the gate of the third transistor is connected to the screen driving module. The control signal includes a first signal, a second signal, and a third signal. The first signal is used to control the on and off states of the first transistor, the second signal is used to control the on and off states of the second transistor, and the third signal is used to control the on and off states of the third transistor.

6. The driving circuit according to claim 3, characterized in that, The voltage adjustment module further includes a first compensation capacitor, a second compensation capacitor, a third compensation capacitor, a fourth compensation capacitor, and a fifth compensation capacitor. One end of the first compensation capacitor is connected to the other end of the first adjusting resistor, one end of the second adjusting resistor, and one end of the first branch, and the other end of the first compensation capacitor is grounded. One end of the second compensation capacitor is connected to the other end of the second adjusting resistor, one end of the third adjusting resistor, and one end of the second branch, and the other end of the second compensation capacitor is grounded. One end of the third compensation capacitor is connected to the other end of the third adjusting resistor, one end of the fourth adjusting resistor, and one end of the third branch, and the other end of the third compensation capacitor is grounded. One end of the fourth compensation capacitor is connected to the other end of the fourth adjusting resistor, one end of the fifth adjusting resistor, and one end of the fourth branch, and the other end of the fourth compensation capacitor is grounded. One end of the fifth compensation capacitor is connected to the other end of the fifth adjusting resistor and one end of the fifth branch, and the other end of the fifth compensation capacitor is grounded.

7. A driving method, characterized in that, The driving method is applied to the driving circuit of a display panel. The driving circuit includes a driving module, a feedback module, an operational amplifier, a screen driving module, and a voltage adjustment module. The operational amplifier includes a first input terminal, a second input terminal, and an output terminal. One end of the feedback module is connected to the second input terminal, and the other end of the feedback module is connected to the output terminal. The output terminal is also connected to the voltage adjustment module. The voltage adjustment module is also connected to the screen driving module and the display panel. The driving module is connected to the first input terminal and is used to transmit a first voltage to the first input terminal. The screen driving module is used to acquire a low-voltage differential signal and process the low-voltage differential signal to generate a control signal, wherein: Based on the first voltage, the operational amplifier is controlled to generate a second voltage at its output terminal; The feedback module is controlled to adjust the second voltage to generate a third voltage, and the third voltage is transmitted to the second input terminal through the feedback module. The operational amplifier is controlled to adjust the second voltage according to the magnitudes of the first voltage and the third voltage to generate a fourth voltage; The voltage adjustment module is controlled to adjust the fourth voltage according to the control signal to generate a fifth voltage and output the fifth voltage to the display panel.

8. The driving method according to claim 7, characterized in that, The feedback module includes a first capacitor, a second capacitor, a third capacitor, a first resistor, and a second resistor. One end of the first resistor is connected to the output terminal, one end of the second capacitor, and one end of the voltage adjustment module. The other end of the first resistor is connected to one end of the first capacitor and one end of the second resistor. The other end of the first capacitor is grounded. The other end of the second resistor is connected to the other end of the second capacitor, one end of the third capacitor, and the second input terminal. The other end of the third capacitor is grounded.

9. The driving method according to claim 8, characterized in that, The voltage adjustment module further includes a first adjustment resistor, a second adjustment resistor, a third adjustment resistor, a fourth adjustment resistor, a fifth adjustment resistor, a first branch, a second branch, a third branch, a fourth branch, and a fifth branch. One end of the first adjustment resistor is connected to the other end of the feedback module and the output terminal. The other end of the first adjustment resistor is connected to one end of the first branch and one end of the second adjustment resistor. The other end of the second adjustment resistor is connected to one end of the second branch and one end of the third adjustment resistor. The other end of the third adjustment resistor is connected to one end of the third branch and one end of the fourth adjustment resistor. The other end of the fourth adjustment resistor is connected to one end of the fourth branch and one end of the fifth adjustment resistor. The other end of the fifth adjustment resistor is connected to one end of the fifth branch. The other ends of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch are all connected to the display panel. According to the control signal, the voltage adjustment module controls one of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch to be turned on, while the other four branches are turned off.

10. A display device, characterized in that, It includes a display panel and a driving circuit, the display panel being electrically connected to the driving circuit, the driving circuit being used to perform the driving method as described in any one of claims 7-9.

Images