Display panel control circuit and display device

Abstract

The application discloses a display panel control circuit and a display device. The display panel control circuit comprises a power input module, a voltage stabilizing module, a receiving module and an output adjusting module. The power input module is used for generating a rectified signal. The voltage stabilizing module is connected with the power input module and used for receiving the rectified signal and outputting a working power signal, so that the voltage of the working power signal fluctuates in a set range. The receiving module is used for receiving pixel data of a display panel and outputting a voltage control signal according to the pixel data. The output adjusting module is connected with the receiving module and the voltage stabilizing module simultaneously and used for adjusting the output voltage of the working power signal output to the display panel according to the voltage control signal. The application can alleviate the problems of unsatisfactory display effect, large power consumption, large heat generation and low energy efficiency of the display panel caused by the insufficient matching degree of the output voltage of the control circuit and the display effect of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel control circuit and display device. Background Technology

[0002] The display principle of an LED (Light Emitting Diode) display panel is that a control circuit outputs a driving voltage to each pixel on the LED display panel to adjust the brightness of each pixel. Different colored pixels emit light of different brightness, ultimately forming a display image.

[0003] Currently, in related technologies, the output voltage of the control circuit is not well matched with the display effect of the display panel, resulting in unsatisfactory display effects. In addition, there are problems such as high power consumption, high heat generation, and low energy efficiency of the display panel. Summary of the Invention

[0004] To address the aforementioned technical problems and deficiencies, the present invention aims to provide a display panel control circuit and display device that can alleviate the problems of unsatisfactory display effects, high power consumption, high heat generation, and low energy efficiency caused by insufficient matching between the output voltage of the control circuit and the display effect of the display panel.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a display panel control circuit, comprising:

[0006] Power input module, used to generate rectified signals;

[0007] The voltage regulator module, connected to the power input module, is used to receive the rectified signal and output the working power signal, so that the voltage of the working power signal fluctuates within a set range.

[0008] The receiving module is used to receive pixel data from the display panel and output voltage control signals based on the pixel data;

[0009] The output adjustment module, which is connected to both the receiving module and the voltage regulator module, is used to adjust the output voltage of the working power signal output to the display panel according to the voltage control signal.

[0010] In the above embodiments, the power input module transmits a rectified signal to the output adjustment module. The voltage regulator module is connected between the power input module and the output adjustment module, which can decouple the power input module and the output adjustment module, stabilize the voltage of the output adjustment module, and prevent the power input module from failing to meet the energy requirements of the output adjustment module, thus preventing large fluctuations in the voltage of the output adjustment module. At the same time, the receiving module outputs a voltage control signal based on the pixel data, and the output adjustment module controls the output voltage based on the voltage control signal. Each pixel on the display panel controls its brightness based on the output voltage. This makes the output voltage match the display effect of the display panel, reduces the power consumption and heat generation of the display panel, and improves energy efficiency and display effect.

[0011] Optionally, the receiving module includes a first digital-to-analog converter and a first comparator; the input terminal of the first digital-to-analog converter is connected to pixel data, and the output terminal is connected to the first input terminal of the first comparator; the second input terminal of the first comparator is connected to the output voltage, and the output terminal is connected to the output adjustment module.

[0012] In the above embodiment, the first digital-to-analog converter converts the pixel data from a digital signal to an analog signal, generating a pixel data analog signal. The voltage of the pixel data analog signal is a reference voltage Vref1. The first comparator compares the reference voltage Vref1 with the output voltage Vout to obtain the comparison result, and outputs a voltage control signal based on the comparison result. In this way, the output voltage Vout can follow the changes of the reference voltage Vref1 in a timely manner, improving the matching degree between the output voltage Vout and the pixel data.

[0013] Optionally, the receiving module includes a digital controller, an operational amplifier, a second comparator, a second digital-to-analog converter (DAC), and a third DAC. The digital controller generates a reference voltage signal and a comparison voltage signal based on pixel data. The input of the second DAC is connected to the reference voltage signal, and its output is connected to the first input of the operational amplifier. The second input of the operational amplifier is connected to the output voltage, and its output is connected to the first input of the second comparator. The input of the third DAC is connected to the comparison voltage signal, and its output is connected to the second input of the second comparator. The output of the second comparator is connected to the digital controller, and one end of the digital controller is connected to the output adjustment module.

[0014] In the above embodiment, the digital controller receives pixel data, analyzes the brightness and color information contained in the pixel data, generates a reference voltage signal, and sends the reference voltage signal to the second digital-to-analog converter (DAC). The second DAC converts the reference voltage signal into an analog signal, the voltage of which is the reference voltage Vref2. The operational amplifier subtracts the reference voltage Vref2 from the output voltage Vout, obtaining the result Vout-Vref2. The digital controller sends a comparison digital signal to the third DAC, which converts the digital signal into a corresponding analog signal, the voltage of which is V1, slightly less than Vout-Vref2. The second comparator compares the difference between Vout-Vref2 and V1, obtaining a comparison result. Based on this comparison result, the digital controller sends a voltage control signal to the output adjustment module. In this way, the output voltage Vout can follow the changes in the reference voltage Vref2 in a timely manner, improving the matching degree between the output voltage Vout and the pixel data.

[0015] Optionally, the voltage control signal includes a first voltage control signal and a second voltage control signal with opposite phases; the output adjustment module includes a first field-effect transistor, a second field-effect transistor, an energy storage inductor, a filter capacitor, and a power output terminal; the gate of the first field-effect transistor is connected to the first voltage control signal, the first electrode is connected to the voltage regulator module, and the second electrode is connected to one end of the energy storage inductor; the gate of the second field-effect transistor is connected to the second voltage control signal, the first electrode is connected to one end of the energy storage inductor, and the second electrode is grounded; the other end of the energy storage inductor is connected to both one end of the filter capacitor and the power output terminal, and the other end of the filter capacitor is grounded.

[0016] In the above embodiments, the output adjustment module employs a buck circuit or a multiphase topology buck circuit. By using a first voltage control signal and a second voltage control signal with opposite phases, the switching states of the first and second field-effect transistors can be controlled, thereby controlling the switching frequency of the buck circuit. In the buck circuit, an increase in the switching frequency increases the output voltage Vout, and a decrease in the switching frequency decreases the output voltage Vout. The magnitude of the output voltage is controlled by controlling the switching frequency.

[0017] Optionally, the output adjustment module further includes a first inverting driver and a first non-inverting driver; the input terminal of the first inverting driver is connected to a voltage control signal, and the output terminal is connected to the gate of the first field-effect transistor; the input terminal of the first non-inverting driver is connected to a voltage control signal, and the output terminal is connected to the gate of the second field-effect transistor.

[0018] In the above embodiments, since the voltage control signals output from the digital controller or the first comparator are generally in phase, by adding a first inverting driver between the digital controller or the first comparator and the first field-effect transistor, and adding a first non-inverting driver between the digital controller or the first comparator and the second field-effect transistor, the first voltage control signal input to the first field-effect transistor can be made to have a phase opposite to the second voltage control signal of the second field-effect transistor.

[0019] Optionally, the output adjustment module further includes a second inverting driver and a second non-inverting driver; the input terminal of the second non-inverting driver is connected to a voltage control signal, and the output terminal is connected to the gate of the first field-effect transistor; the input terminal of the second inverting driver is connected to a voltage control signal, and the output terminal is connected to the gate of the second field-effect transistor.

[0020] In the above embodiments, by adding a second in-phase driver between the digital controller or the first comparator and the first field-effect transistor, and adding a second in-phase driver between the digital controller or the first comparator and the second field-effect transistor, it can be realized that the first voltage control signal input to the first field-effect transistor is opposite in phase to the second voltage control signal of the second field-effect transistor.

[0021] Optionally, the power input module includes a first rectification and filtering module, a power switch module, a transformer, a second rectification and filtering module, a voltage feedback module, and a PWM control module. The first rectification and filtering module receives the rectified signal and is connected to the input terminal of the transformer. One end of the power switch module is connected to the PWM control module, and the other end is connected to the input terminal of the transformer. The output terminal of the transformer is connected to the input terminal of the second rectification and filtering module, and the output terminal of the second rectification and filtering module is connected to the voltage regulator module.

[0022] In the above embodiment, the first rectifier and filter module can convert the incoming AC power supply into DC power supply and perform filtering. The power switch module can change its switching state according to the pulse signal issued by the PWM control module. The transformer changes the voltage output to the second rectifier and filter module according to the switching signal of the power switch module and the DC power supply transmitted by the first rectifier and filter module. After rectification and filtering by the second rectifier and filter module, the voltage received by the output adjustment module is made to be within the normal operating range required by the display panel. At the same time, the voltage feedback circuit feeds back the voltage output by the second rectifier and filter module to the PWM control module, which then controls the sending of pulse signals to the power switch module. In this way, a control loop is formed based on the power switch module, the transformer, the second rectifier and filter module, the voltage feedback module, and the PWM control module.

[0023] Optionally, the transformer includes an input coil and an output coil arranged opposite to each other, the power switching module includes a third field-effect transistor, one end of the input coil is connected to the first rectifier and filter module, the other end is connected to the first electrode of the third field-effect transistor, the gate of the third field-effect transistor is connected to the PWM control module, the second electrode is grounded, and the output coil is connected to the second rectifier and filter module.

[0024] In the above embodiment, the third field-effect transistor controls the switching state of the transformer according to the pulse signal of the PWM control module, thereby enabling the transformer to change the voltage output to the second rectifier and filter module.

[0025] Optionally, the voltage regulator module includes a voltage regulator capacitor, one end of which is connected to both the power input module and the output adjustment module, and the other end is grounded.

[0026] In the above embodiment, the power input module has a slower response speed, while the output adjustment module has a faster response speed. Connecting the voltage regulator capacitor Cbus between the two prevents the energy output from the power input module from failing to meet the energy requirements of the high-efficiency output adjustment module, thus preventing large fluctuations in the output voltage of the high-efficiency output adjustment module. This achieves the effect of decoupling the power input module and the output adjustment module.

[0027] In a second aspect, the present invention provides a display device, including a display panel and the aforementioned display panel control circuit, wherein the display panel and the display panel control circuit are connected.

[0028] The display device in this embodiment uses the display panel control circuit provided in any of the above embodiments. Therefore, it has the beneficial effects of the display panel control circuit provided in any of the above embodiments.

[0029] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0030] 1. A rectified signal is transmitted from the power input module to the output adjustment module. A voltage regulator module is connected between the power input module and the output adjustment module, decoupling them and stabilizing the voltage of the output adjustment module. This prevents the power input module from failing to meet the energy requirements of the output adjustment module, which could cause significant voltage fluctuations. Simultaneously, the receiving module outputs a voltage control signal based on pixel data, and the output adjustment module controls the output voltage according to this signal. The brightness of each pixel on the display panel is then controlled by the output voltage. This ensures that the output voltage matches the display panel's display effect, solving the problems in related technologies where insufficient matching between the control circuit's output voltage and the display panel's display effect leads to unsatisfactory display effects, high power consumption, high heat generation, and low energy efficiency. This reduces the display panel's power consumption and heat generation, improving energy efficiency and display quality.

[0031] 2. The first digital-to-analog converter converts the pixel data from digital signals to analog signals, generating a pixel data analog signal. The voltage of the pixel data analog signal is a reference voltage Vref1. The first comparator compares the reference voltage Vref1 with the output voltage Vout, obtains the comparison result, and outputs a voltage control signal based on the comparison result. This effectively solves the technical problem of untimely changes in the output voltage Vout in related technologies. It enables the output voltage Vout to follow the changes in the reference voltage Vref1 in a timely manner, improving the matching degree with the display effect.

[0032] 3. The digital controller receives pixel data, analyzes the brightness and color information contained in the pixel data, generates a reference voltage signal, and sends this reference voltage signal to the second digital-to-analog converter (DAC). The second DAC converts the reference voltage signal into an analog signal, the voltage of which is the reference voltage Vref2. The operational amplifier subtracts the reference voltage Vref2 from the output voltage Vout, obtaining the result Vout-Vref2. The digital controller sends a comparison digital signal to the third DAC, which converts this digital signal into a corresponding analog signal, the voltage of which is V1. The value of V1 is slightly less than Vout-Vref2. The second comparator compares the difference between Vout-Vref2 and V1, obtaining the comparison result. Based on this comparison result, the digital controller sends a voltage control signal to the output adjustment module. This effectively solves the technical problem of untimely changes in the output voltage Vout in related technologies. It enables the output voltage Vout to change in a timely manner following the reference voltage Vref2, improving the matching degree with the display effect. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0034] Figure 1 This is a graph showing the current-voltage characteristic curves of LEDs in related technologies;

[0035] Figure 2 This is the circuit of the display panel control circuit in an embodiment of the present invention. Figure 1 ;

[0036] Figure 3 This is the circuit of the receiving module and the output adjustment module in the embodiment of the present invention. Figure 1 ;

[0037] Figure 4 This is the circuit of the receiving module and the output adjustment module in the embodiment of the present invention. Figure 2 ;

[0038] Figure 5 This is a schematic diagram of the triangular mode analog signal in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the connection between the inverting driver and the non-inverting driver in an embodiment of the present invention. Figure 1 ;

[0040] Figure 7 This is a schematic diagram of the connection between the inverting driver and the non-inverting driver in an embodiment of the present invention. Figure 2 ;

[0041] Figure 8 This is the circuit of the display panel control circuit in an embodiment of the present invention. Figure 2 ;

[0042] Figure 9 This is a circuit diagram showing the red LED branch powered by a series resistor in the relevant technology;

[0043] Figure 10 This is a schematic diagram of LED power loss under constant voltage power supply mode in related technologies. Detailed Implementation

[0044] The terminology used in the following embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and appended claims of the present invention, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in the present invention refers to and includes any or all possible combinations of one or more of the listed items. Hereinafter, the terms “first” and “second” are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of the present invention, unless otherwise stated, “a plurality” means two or more.

[0045] In this embodiment, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the above description to give a full understanding of the embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention. The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0046] An LED display panel consists of multiple LEDs of different colors, typically including red, green, and blue LEDs. Due to the different semiconductor characteristics of red, green, and blue LEDs, the supply voltage of red LEDs is much lower than that of green and blue LEDs. The current-voltage characteristic curves of each color LED are shown below. Figure 1 As shown in one example, when the forward voltage drop is around 2.5V, the forward current of the red LED can reach about 98mA, the forward current of the green LED is about 35mA, and the forward current of the blue LED is about 12mA. Therefore, the brightness of the light emitted by the red, green, and blue LEDs using the same voltage is different; conversely, the voltage required for the red, green, and blue LEDs to emit light of the same brightness is also different.

[0047] Therefore, a power supply control circuit is needed to control the power supply voltage of each LED on the display panel, thereby controlling the brightness of each LED and forming the displayed image. In related technologies, the output voltage of the power supply control circuit is not well matched with the display effect of the display panel, resulting in unsatisfactory display effects and causing problems such as high power consumption, high heat generation, and low energy efficiency of the display panel.

[0048] Therefore, embodiments of the present invention provide a display panel control circuit, such as... Figure 2As shown, the system includes a power input module 1, a voltage regulator module 2, a receiving module 3, and an output adjustment module 4. The power input module 1 generates a rectified signal; the voltage regulator module 2, connected to the power input module 1, receives the rectified signal and outputs a working power signal, causing the voltage of the working power signal to fluctuate within a set range; the receiving module 3 receives pixel data from the display panel and outputs a voltage control signal based on the pixel data; the output adjustment module 4, connected to both the receiving module 3 and the voltage regulator module 2, adjusts the output voltage of the working power signal sent to the display panel according to the voltage control signal.

[0049] In this embodiment of the invention, the circuit structure described above is used. The power input module 1 transmits a rectified signal to the output adjustment module 4. The voltage regulator module 2 is connected between the power input module 1 and the output adjustment module 4, which can decouple the power input module 1 and the output adjustment module 4, stabilize the voltage of the output adjustment module 4, and prevent the power transmitted by the power input module 1 from failing to meet the energy requirements of the output adjustment module 4, thus preventing large fluctuations in the voltage of the output adjustment module 4. At the same time, the receiving module 3 outputs a voltage control signal based on the pixel data, and the output adjustment module 4 controls the output voltage based on the voltage control signal. Each pixel on the display panel controls its brightness based on the output voltage, so that the output voltage matches the display effect of the display panel, reducing the power consumption and heat generation of the display panel, and improving energy efficiency and display effect.

[0050] The display panel is an LED display panel. The power input module 1 can be an AC / DC power module, which converts the input AC power into DC power and sends it to the output adjustment module 4. The voltage input to the power input module 1 is 80V to 265V. The output adjustment module 4 can be a DC / DC power module. The power input module 1 and the output adjustment module 4 are cascaded.

[0051] Pixel data can originate from LED transmitting card 5, which then transmits the pixel data to receiving module 3. Within the LED display panel, one LED light-emitting device constitutes one pixel. The pixel data includes the power supply voltage information of the LED light-emitting device, which can characterize the brightness of the LED light-emitting devices within the display panel.

[0052] In one embodiment, the receiving module 3 can send a voltage control signal to the output adjustment module 4 in an analog signal mode. Specifically, as shown... Figure 3 As shown, the receiving module 3 includes a first digital-to-analog converter 31 and a first comparator 32; the input terminal of the first digital-to-analog converter 31 is connected to pixel data, and the output terminal is connected to the first input terminal of the first comparator 32; the second input terminal of the first comparator 32 is connected to the output voltage, and the output terminal is connected to the output adjustment module 4.

[0053] Among them, the first digital-to-analog converter 31 converts the digital pixel data into an analog signal to generate an analog pixel data signal. The voltage of the analog pixel data signal is the reference voltage Vref1. The first comparator 32 compares the reference voltage Vref1 with the output voltage Vout to obtain a comparison result, and outputs a voltage control signal according to the comparison result. Specifically, the LED sending card 5 generates a digital signal according to the pixel data in the power supply area corresponding to the display panel control circuit, and this digital signal represents the brightness of the pixels in the power supply area.

[0054] When the pixels in the power supply area need to become brighter, increase the digital signal output to the first digital-to-analog converter 31, then the reference voltage Vref1 increases. The comparison result of the first comparator 32 is Vref1 > Vout, and then a voltage control signal Vcon1 is output to the output adjustment module 4, so that the output adjustment module 4 increases the output voltage Vout, and the luminous brightness of the pixels in the power supply area increases.

[0055] When the pixels in the power supply area need to become darker, decrease the digital signal output to the first digital-to-analog converter 31, then the reference voltage Vref1 decreases. The comparison result of the first comparator 32 is Vref1 < Vout, and then a voltage control signal Vcon2 is output to the output adjustment module 4, so that the output adjustment module 4 decreases the output voltage Vout, and the luminous brightness of the pixels in the power supply area decreases.

[0056] In this way, the output voltage Vout can change in time following the reference voltage Vref1, improving the matching degree between the output voltage Vout and the display effect. The output adjustment module 4 can adjust the output voltage Vout more actively, making the output voltage Vout match the luminous brightness of each pixel on the display panel, reducing the power consumption and heat generation of the display panel, and improving the energy utilization efficiency and display effect.

[0057] Especially when adjusting the output voltage Vout at low gray levels of pixels, combined with technologies such as error diffusion / dithering, the noise generated during the dithering or error diffusion process can be eliminated, achieving a display effect where the dark part of the display panel is darker and the low gray levels are more uniform.

[0058] In one embodiment, the receiving module 3 can also send a voltage control signal to the output adjustment module 4 in the form of a digital signal. Specifically, as Figure 4As shown, the receiving module 3 includes a digital controller 33, an operational amplifier 34, a second comparator 35, a second digital-to-analog converter 36, and a third digital-to-analog converter 37. The digital controller 33 generates a reference voltage signal and a comparison voltage signal based on pixel data. The input terminal of the second digital-to-analog converter 36 is connected to the reference voltage signal, and its output terminal is connected to the first input terminal of the operational amplifier 34. The second input terminal of the operational amplifier 34 is connected to the output voltage, and its output terminal is connected to the first input terminal of the second comparator 35. The input terminal of the third digital-to-analog converter 37 is connected to the comparison voltage signal, and its output terminal is connected to the second input terminal of the second comparator 35. The output terminal of the second comparator 35 is connected to the digital controller 33, and one end of the digital controller 33 is connected to the output adjustment module 4.

[0059] In this process, LED transmitting card 5 sends pixel data to digital controller 33. Digital controller 33 analyzes the brightness and color information contained in the pixel data, generates a reference voltage signal, and sends this reference voltage signal to second digital-to-analog converter 36. Second digital-to-analog converter 36 converts the reference voltage signal into an analog signal, the voltage of which is the reference voltage Vref2. Operational amplifier 34 subtracts the reference voltage Vref2 from its output voltage Vout, obtaining the result Vout-Vref2. Digital controller 33 sends a comparison digital signal to third digital-to-analog converter 37, which converts this digital signal into a corresponding analog signal, the voltage of which is V1, slightly less than Vout-Vref2. Second comparator 35 compares the difference between Vout-Vref2 and V1, obtaining a comparison result. Based on this comparison result, digital controller 33 sends a voltage control signal to output adjustment module 4.

[0060] When a pixel within the power supply area needs to be brightened, the digital controller 33 increases the reference voltage signal output to the second digital-to-analog converter 36, thereby increasing the reference voltage Vref2 and decreasing the value of Vout-Vref2. The difference between Vout-Vref2 and V1 decreases, and based on this comparison result, the digital controller 33 sends a control signal Vcon3 to the output adjustment module 4, causing the output adjustment module 4 to increase the output voltage Vout, thus increasing the brightness of the pixels within the power supply area.

[0061] When a pixel within the power supply area needs to be darkened, the digital controller 33 reduces the reference voltage signal output to the second digital-to-analog converter 36. The reference voltage Vref2 decreases, and the value of Vout-Vref2 increases. The difference between Vout-Vref2 and V1 increases. Based on this comparison result, the digital controller 33 sends a control signal Vcon4 to the output adjustment module 4, causing the output adjustment module 4 to reduce the output voltage Vout, thus reducing the brightness of the pixels within the power supply area.

[0062] In this way, the output voltage Vout can change in a timely manner with the reference voltage Vref2, improving the matching degree between the output voltage Vout and the display effect. The output adjustment module 4 can more actively adjust the output voltage Vout, so that the output voltage Vout matches the brightness of each pixel on the display panel, reducing the power consumption and heat generation of the display panel, and improving energy utilization efficiency and display effect.

[0063] Especially when the pixel is in low grayscale, adjusting the output voltage Vout, combined with error diffusion / jitter and other technologies, can eliminate the noise generated during the jitter or error diffusion process, and achieve a darker dark area and more uniform low grayscale display effect on the display panel.

[0064] In this embodiment, the output adjustment module 4 can achieve a high dynamic response speed, ensuring that the output voltage can quickly and dynamically track the voltage control signal given by the receiving module 3.

[0065] In one embodiment, the voltage control signal includes a first voltage control signal and a second voltage control signal with opposite phases. The output adjustment module 4 includes a first field-effect transistor 41, a second field-effect transistor 42, an energy storage inductor 43, and a filter capacitor C; the gate of the first field-effect transistor 41 is connected to the first voltage control signal, the first electrode is connected to the voltage regulator module 2, and the second electrode is connected to one end of the energy storage inductor 43; the gate of the second field-effect transistor 42 is connected to the second voltage control signal, the first electrode is connected to one end of the energy storage inductor 43, and the second electrode is grounded to GND; the other end of the energy storage inductor 43 is connected to one end of the filter capacitor C, and the other end of the filter capacitor C is grounded to GND.

[0066] Based on the above circuit structure, the output adjustment module 4 employs a buck circuit or a multiphase topology buck circuit. By using a first voltage control signal and a second voltage control signal with opposite phases, the switching states of the first and second field-effect transistors can be controlled, thereby controlling the switching frequency of the buck circuit. In the buck circuit, an increase in the switching frequency leads to an increase in the output voltage Vout, and a decrease in the switching frequency leads to a decrease in the output voltage Vout. A specific controllable method can be illustrated by taking the receiving module 3 sending a voltage control signal to the output adjustment module 4 in analog signal mode as an example:

[0067] When a pixel within the power supply area needs to be brightened, the digital controller 33 increases the reference voltage signal output to the second digital-to-analog converter 36, thus increasing the reference voltage Vref2 and decreasing the value of Vout-Vref2. The digital controller 33 sends a digital signal to the third digital-to-analog converter 37, causing the third digital-to-analog converter 37 to generate a triangular wave analog signal with a voltage of V1. The difference between Vout-Vref2 and voltage V1 decreases, and voltage V1 approaches the value of Vout-Vref2 more quickly. The relationship between the two is unstable and more prone to flipping, increasing the flip frequency of the comparator. This increases the switching frequency of the voltage adjustment signal sent by the digital controller 33 to the output adjustment module 4, thereby increasing Vout and increasing the brightness of the pixels within the power supply area.

[0068] When a pixel within the power supply area needs to be darkened, the digital controller 33 reduces the reference voltage signal output to the second digital-to-analog converter 36, thus decreasing the reference voltage Vref2 and increasing the value of Vout-Vref2. The digital controller 33 sends a digital signal to the third digital-to-analog converter 37, causing the third digital-to-analog converter 37 to generate a triangular wave analog signal, such as... Figure 5 As shown, the voltage of this triangular wave analog signal is V1. The difference between Vout-Vref2 and voltage V1 increases, and the difference between voltage V1 and Vout-Vref2 becomes larger in a shorter time. The relationship between the two is stable and not easy to flip, so the flip frequency of the comparator decreases. The switching frequency of the voltage adjustment signal sent by the digital controller 33 to the output adjustment module 4 decreases, so the output voltage Vout decreases, and the brightness of the pixels in the power supply area decreases.

[0069] The related technology uses PID (proportional integral derivative) control in traditional power supply circuits, which requires controlling the bandwidth of the control loop of the power input module 1 to be between 1 / 20 and 1 / 5 of the switching frequency. This results in a slow response speed and a mismatch between the output voltage Vout and the pixel data. However, this embodiment uses the aforementioned structure to form a hysteresis control method, which allows the output adjustment module 4 to have the advantages of real-time control, fast response speed, and strong robustness. The output voltage Vout can promptly follow the changes in the reference voltage Vref2. The output adjustment module 4 can more actively adjust the output voltage Vout, making it match the brightness of each pixel on the display panel, reducing the power consumption and heat generation of the display panel, and improving energy utilization efficiency and display effect.

[0070] In one embodiment, such as Figure 6As shown, the output adjustment module 4 also includes a first inverting driver 45 and a first non-inverting driver 46; the input terminal of the first inverting driver 45 is connected to a voltage control signal, and the output terminal is connected to the gate of the first field-effect transistor 41; the input terminal of the first non-inverting driver 46 is connected to a voltage control signal, and the output terminal is connected to the gate of the second field-effect transistor 42.

[0071] Since the voltage control signals output from the digital controller 33 or the first comparator 32 are generally in phase, by adding a first inverting driver 45 between the digital controller 33 or the first comparator 32 and the first field-effect transistor 41, and adding a first non-inverting driver 46 between the digital controller 33 or the first comparator 32 and the second field-effect transistor 42, the first voltage control signal input to the first field-effect transistor 41 can be made to have a phase opposite to the second voltage control signal of the second field-effect transistor 42.

[0072] In one embodiment, such as Figure 7 As shown, the output adjustment module 4 also includes a second inverting driver 47 and a second non-inverting driver 48; the input terminal of the second non-inverting driver 48 is connected to a voltage control signal, and the output terminal is connected to the gate of the first field-effect transistor 41; the input terminal of the second inverting driver 47 is connected to a voltage control signal, and the output terminal is connected to the gate of the second field-effect transistor 42.

[0073] Similarly, by adding a second in-phase driver 48 between the digital controller 33 or the first comparator 32 and the first field-effect transistor 41, and adding a second in-phase driver 47 between the digital controller 33 or the first comparator 32 and the second field-effect transistor 42, the first voltage control signal input to the first field-effect transistor 41 can be made to have a phase opposite to the second voltage control signal of the second field-effect transistor 42.

[0074] In one embodiment, such as Figure 1 As shown, the power input module 1 includes a first rectification and filtering module 11, a power switch module 12, a transformer 13, a second rectification and filtering module 14, a voltage feedback module 15, and a PWM (pulse width modulation) control module 16. The first rectification and filtering module 11 receives the rectified signal and is connected to the input terminal of the transformer 13. One end of the power switch module 12 is connected to the PWM control module 16, and the other end is connected to the input terminal of the transformer 13. The output terminal of the transformer 13 is connected to the input terminal of the second rectification and filtering module 14, and the output terminal of the second rectification and filtering module 14 is connected to the voltage regulator module 2.

[0075] The first rectifier and filter module 11 converts the incoming AC power into DC power and performs filtering. The power switch module 12 changes its switching state according to the pulse signal sent by the PWM control module 16. The transformer 13 changes the voltage output to the second rectifier and filter module 14 according to the switching signal of the power switch module 12 and the DC power transmitted by the first rectifier and filter module 11. After rectification and filtering by the second rectifier and filter module 14, the voltage received by the output adjustment module 4 is within the normal operating range required by the display panel. At the same time, the voltage feedback circuit feeds back the voltage output from the second rectifier and filter to the PWM control module 16, which then controls the sending of pulse signals to the power switch module 12.

[0076] This forms a control loop based on the power switch module 12, transformer 13, second rectifier and filter module 14, voltage feedback module 15, and PWM control module 16. At this point, the power input module 1 employs an LLC (Logical Link Control) high-efficiency topology circuit. In this embodiment, the peak efficiency of the power input module 1 is above 90%, and the high-efficiency region is kept as flat as possible.

[0077] In one embodiment, such as Figure 8 As shown, the transformer 13 includes an input coil 131 and an output coil 132 arranged opposite to each other. The power switch module 12 includes a third field-effect transistor 121. One end of the input coil 131 is connected to the first rectifier and filter module 11, and the other end is connected to the first electrode of the third field-effect transistor 121. The gate of the third field-effect transistor 121 is connected to the PWM control module 16, and the second electrode is grounded to GND. The output coil 132 is connected to the second rectifier and filter module 14.

[0078] Specifically, the third field-effect transistor controls the switching state of the transformer 13 according to the pulse signal of the PWM control module 16, thereby enabling the transformer 13 to change the voltage output to the second rectifier and filter module 14.

[0079] In one embodiment, the voltage regulator module 2 includes a voltage regulator capacitor Cbus. One end of the voltage regulator capacitor Cbus is connected to both the power input module 1 and the output adjustment module 4, and the other end is grounded (GND). The voltage regulator capacitor Cbus can act as a charging and discharging buffer. Because the response speed of the AC / DC power module is relatively slow, while the response speed of the DC / DC power module is relatively fast, connecting the voltage regulator capacitor Cbus between the two cascaded power modules (power input module 1 and output adjustment module 4) can prevent the energy output of the AC / DC power module from failing to meet the energy requirements of the high-efficiency DC / DC power module, thus preventing large fluctuations in the output voltage of the high-efficiency DC / DC power module. This achieves the effect of decoupling the two power modules.

[0080] In one embodiment, the display panel control circuit further includes a load resistor R, one end of which is connected to the output adjustment module 4, and the other end is grounded (GND). This makes the output of the output adjustment module 4 more stable.

[0081] In related technologies, the red LED branch requires a series voltage divider resistor, resulting in additional power consumption. In the LED display industry, the power supply for LED display panels is as follows: Figure 9 As shown. Typically, LED display panels are powered by a constant voltage power supply VCC, which supplies power to the LED display panel through the power supply line impedance (Rbus), and has the following characteristics:

[0082] V CC = V BUS +V LED ;

[0083] Currently, there are two power supply systems for LED display panels: one is to supply power to the red LED branch in series with resistors, and the other is to supply power to the red LED branch independently.

[0084] The power supply system for the red LED branch is powered by a series resistor, as shown below. Figure 9 As shown, the red LED is connected in series with resistor R. SR Then, the red LED branch is connected to the same constant voltage source Vcc as the green and blue LEDs. At this time, the red LED branch is connected in series with resistor R. SR It functions as a resistor divider. Because it only requires a series resistor, and the red, green, and blue LEDs use a single power supply, this power supply system is quite common. If the power supply is 4.5V, and the normal operating voltage of the red LED is 2.5V, then R... SR The voltage drop across the LED is 2V. In this case, assuming the LED display panel operates on a pure white screen, the current in the red, green, and blue LED branches is 100mA each, and the supply voltage is 4.5V, then the total power consumption is 4.5 * 0.3 = 1.35W. If the voltage on the red LED branch could be made 2.5V, then:

[0085] The total power consumption is: 2.5*0.1 + 4.5*0.2 = 1.15;

[0086] The power saving is (1.35-1.15) / 1.35=14.8%, which is a relatively limited effect on power reduction.

[0087] The red LED uses a separate low-voltage V RLED Power supply: Green and blue LEDs use a separate, higher voltage V. GBLED The power supply is completely separated into two separate power supplies. While this reduces power consumption, it makes the power supply of the LED display panel more complex.

[0088] In related technologies, constant voltage power supply is often used, applying the same voltage to both the brightest and darkest scenes. This results in more energy being consumed by the line impedance when the scene is darker. For example... Figure 10 As shown, the ideal power dissipation of an LED is the area enclosed by the LED's IV curve and the vertical axis, while the area between the LED's IV curve and the supply voltage is... Figure 10 As shown in the shaded area, Figure 9 The line impedance R in bus It's all wasted. When the image brightness is low, the forward current and forward voltage drop of the LED are both low, while the supply voltage is constant. The voltage difference between the supply voltage and the LED curve increases, leading to increased power consumption. This power consumption is converted into heat, causing the LED display panel itself to heat up. This heat generation further reduces the lifespan and reliability of the LED display panel.

[0089] In this embodiment of the invention, the display panel control circuit includes a first rectification and filtering module 11, a power switch module 12, a transformer 13, a second rectification and filtering module 14, a voltage feedback module 15, a PWM control module 16, a voltage stabilizing capacitor, a first digital-to-analog converter 31, a first comparator 32, a first field-effect transistor 41, a second field-effect transistor 42, an energy storage inductor 43, a filter capacitor C, and a load resistor R.

[0090] The first rectifier-filter module 11 receives the rectified signal and is connected to the input terminal of the transformer 13. One end of the power switch module 12 is connected to the PWM control module 16, and the other end is connected to the input terminal of the transformer 13. The output terminal of the transformer 13 is connected to the input terminal of the second rectifier-filter module 14, and the output terminal of the second rectifier-filter module 14 is connected to the voltage regulator module 2. The input terminal of the first digital-to-analog converter 31 receives pixel data, and its output terminal is connected to the first input terminal of the first comparator 32. The second input terminal of the first comparator 32 receives the output voltage, and its output terminal is connected to the output adjustment module 4. The gate of the first field-effect transistor 41 receives the first voltage control signal, its first electrode is connected to the voltage regulator module 2, and its second electrode is connected to one end of the energy storage inductor 43. The gate of the second field-effect transistor 42 receives the second voltage control signal, its first electrode is connected to one end of the energy storage inductor 43, and its second electrode is grounded to GND. The other end of the energy storage inductor 43 is connected to one end of the filter capacitor C, and the other end of the filter capacitor C is grounded to GND. The voltage regulator capacitor is connected between the second rectifier-filter module 14 and the first field-effect transistor 41.

[0091] In one embodiment, the display panel control circuit includes a first rectification and filtering module 11, a power switch module 12, a transformer 13, a second rectification and filtering module 14, a voltage feedback module 15, a PWM control module 16, a voltage regulator capacitor, a digital controller 33, an operational amplifier 34, a second comparator 35, a second digital-to-analog converter 36, a third digital-to-analog converter 37, a first field-effect transistor 41, a second field-effect transistor 42, an energy storage inductor 43, a filter capacitor C, and a load resistor.

[0092] The first rectifier-filter module 11 receives the rectified signal and is connected to the input terminal of the transformer 13. One end of the power switch module 12 is connected to the PWM control module 16, and the other end is connected to the input terminal of the transformer 13. The output terminal of the transformer 13 is connected to the input terminal of the second rectifier-filter module 14, and the output terminal of the second rectifier-filter module 14 is connected to the voltage regulator module 2. The digital controller 33 generates a reference voltage signal and a comparison voltage signal based on the pixel data. The input terminal of the second digital-to-analog converter 36 receives the reference voltage signal, and its output terminal is connected to the first input terminal of the operational amplifier 34. The second input terminal of the operational amplifier 34 receives the output voltage, and its output terminal is connected to the first input terminal of the second comparator 35. The input terminal of the third digital-to-analog converter 37 receives the comparison voltage signal, and its output terminal is connected to the second input terminal of the second comparator 35. The output terminal of the second comparator 35 is connected to the digital controller 33, and one end of the digital controller 33 is connected to the output adjustment module 4. The gate of the first field-effect transistor 41 is connected to a first voltage control signal, its first electrode is connected to the voltage regulator module 2, and its second electrode is connected to one end of the energy storage inductor 43. The gate of the second field-effect transistor 42 is connected to a second voltage control signal, its first electrode is connected to one end of the energy storage inductor 43, and its second electrode is grounded to GND. The other end of the energy storage inductor 43 is connected to one end of the filter capacitor C, and the other end of the filter capacitor C is grounded to GND. The voltage regulator capacitor is connected between the second rectifier filter module 14 and the first field-effect transistor 41.

[0093] Through the aforementioned control circuit, the output voltage Vout can be adjusted more actively, allowing for a better match between the output voltage and pixel data. This can improve the energy efficiency of the display panel and reduce power consumption, lowering display power consumption by 20-40%. This achieves more efficient and energy-saving LED display control technology, and also improves the lifespan and reliability of the LED display. Furthermore, it can enhance the display contrast of the LED display. Especially in low-grayscale conditions, by actively controlling the power supply voltage of the output adjustment module 4, further improvement in image contrast can be achieved under low-grayscale conditions.

[0094] This invention also provides a display device, including a display panel and a display panel control circuit provided in the above embodiments, wherein the display panel and the display panel control circuit are connected.

[0095] In the display device of this embodiment, the display panel control circuit includes a power input module 1, a voltage regulator module 2, a receiving module 3, and an output adjustment module 4. The power input module 1 generates a rectified signal; the voltage regulator module 2, connected to the power input module 1, receives the rectified signal and outputs a working power signal, causing the voltage of the working power signal to fluctuate within a set range; the receiving module 3 receives pixel data from the display panel and outputs a voltage control signal based on the pixel data; the output adjustment module 4, connected to both the receiving module 3 and the voltage regulator module 2, adjusts the output voltage of the working power signal output to the display panel according to the voltage control signal.

[0096] In this embodiment of the invention, the circuit structure described above is used. The power input module 1 transmits a rectified signal to the output adjustment module 4. The voltage regulator module 2 is connected between the power input module 1 and the output adjustment module 4, which can decouple the power input module 1 and the output adjustment module 4, stabilize the voltage of the output adjustment module 4, and prevent the power transmitted by the power input module 1 from failing to meet the energy requirements of the output adjustment module 4, thus preventing large fluctuations in the voltage of the output adjustment module 4. At the same time, the receiving module 3 outputs a voltage control signal based on the pixel data, and the output adjustment module 4 controls the output voltage based on the voltage control signal. Each pixel on the display panel controls its brightness based on the output voltage, so that the output voltage matches the display effect of the display panel, reducing the power consumption and heat generation of the display panel, and improving energy efficiency and display effect.

[0097] In one embodiment, the display panel control circuit includes a first rectification and filtering module 11, a power switch module 12, a transformer 13, a second rectification and filtering module 14, a voltage feedback module 15, a PWM control module 16, a voltage regulator capacitor, a first digital-to-analog converter 31, a first comparator 32, a first field-effect transistor 41, a second field-effect transistor 42, an energy storage inductor 43, a filter capacitor C, and a load resistor R.

[0098] Specifically, the first rectification and filtering module 11 accesses the rectified signal and is connected to the input end of the transformer 13. One end of the power switch module 12 is connected to the PWM control module 16, and the other end is connected to the input end of the transformer 13. The output end of the transformer 13 is connected to the input end of the second rectification and filtering module 14, and the output end of the second rectification and filtering module 14 is connected to the voltage regulation module 2. The input end of the first digital-to-analog converter 31 accesses the pixel data, and the output end is connected to the first input end of the first comparator 32; the second input end of the first comparator 32 accesses the output voltage, and the output end is connected to the output adjustment module 4. The gate of the first field-effect transistor 41 accesses the first voltage control signal, the first electrode is connected to the voltage regulation module 2, and the second electrode is connected to one end of the energy storage inductor 43; the gate of the second field-effect transistor 42 accesses the second voltage control signal, the first electrode is connected to one end of the energy storage inductor 43, and the second electrode is grounded to GND; the other end of the energy storage inductor 43 is connected to one end of the filter capacitor C, and the other end of the filter capacitor C is grounded to GND. The voltage regulation capacitor is connected between the second rectification and filtering module 14 and the first field-effect transistor 41.

[0099] Among them, the first digital-to-analog converter 31 converts the digital pixel data into an analog signal, generating an analog pixel data signal. The voltage of the analog pixel data signal is the reference voltage Vref1. The first comparator 32 compares the reference voltage Vref1 with the output voltage Vout to obtain a comparison result, and outputs a voltage control signal according to the comparison result. Specifically, the LED sending card 5 generates a digital signal according to the pixel data in the power supply area corresponding to the display panel control circuit, and this digital signal represents the brightness of the pixels in the power supply area.

[0100] When the pixels in the power supply area need to become brighter, increase the digital signal output to the first digital-to-analog converter 31, then the reference voltage Vref1 increases. The comparison result of the first comparator 32 is Vref1 > Vout, and a voltage control signal Vcon1 is output to the output adjustment module 4, so that the output adjustment module 4 increases the output voltage Vout, and the luminous brightness of the pixels in the power supply area increases.

[0101] When the pixels in the power supply area need to become darker, decrease the digital signal output to the first digital-to-analog converter 31, then the reference voltage Vref1 decreases. The comparison result of the first comparator 32 is Vref1 < Vout, and a voltage control signal Vcon2 is output to the output adjustment module 4, so that the output adjustment module 4 decreases the output voltage Vout, and the luminous brightness of the pixels in the power supply area decreases.

[0102] In this way, the output voltage Vout can promptly follow the changes in the reference voltage Vref1. The output adjustment module 4 can more actively adjust the output voltage Vout, ensuring that it matches the brightness of each pixel on the display panel, reducing power consumption and heat generation, and improving energy efficiency and display effect. Especially when adjusting the output voltage Vout at low gray levels, combined with error diffusion / jitter technologies, noise generated during jitter or error diffusion can be eliminated, resulting in darker dark areas and more uniform low gray levels on the display panel.

[0103] In one embodiment, the display panel control circuit includes a first rectification and filtering module 11, a power switch module 12, a transformer 13, a second rectification and filtering module 14, a voltage feedback module 15, a PWM control module 16, a voltage regulator capacitor, a digital controller 33, an operational amplifier 34, a second comparator 35, a second digital-to-analog converter 36, a third digital-to-analog converter 37, a first field-effect transistor 41, a second field-effect transistor 42, an energy storage inductor 43, a filter capacitor C, and a load resistor.

[0104] The first rectifier-filter module 11 receives the rectified signal and is connected to the input terminal of the transformer 13. One end of the power switch module 12 is connected to the PWM control module 16, and the other end is connected to the input terminal of the transformer 13. The output terminal of the transformer 13 is connected to the input terminal of the second rectifier-filter module 14, and the output terminal of the second rectifier-filter module 14 is connected to the voltage regulator module 2. The digital controller 33 generates a reference voltage signal and a comparison voltage signal based on the pixel data. The input terminal of the second digital-to-analog converter 36 receives the reference voltage signal, and its output terminal is connected to the first input terminal of the operational amplifier 34. The second input terminal of the operational amplifier 34 receives the output voltage, and its output terminal is connected to the first input terminal of the second comparator 35. The input terminal of the third digital-to-analog converter 37 receives the comparison voltage signal, and its output terminal is connected to the second input terminal of the second comparator 35. The output terminal of the second comparator 35 is connected to the digital controller 33, and one end of the digital controller 33 is connected to the output adjustment module 4. The gate of the first field-effect transistor 41 is connected to a first voltage control signal, its first electrode is connected to the voltage regulator module 2, and its second electrode is connected to one end of the energy storage inductor 43. The gate of the second field-effect transistor 42 is connected to a second voltage control signal, its first electrode is connected to one end of the energy storage inductor 43, and its second electrode is grounded to GND. The other end of the energy storage inductor 43 is connected to one end of the filter capacitor C, and the other end of the filter capacitor C is grounded to GND. The voltage regulator capacitor is connected between the second rectifier filter module 14 and the first field-effect transistor 41.

[0105] When a pixel within the power supply area needs to be brightened, the digital controller 33 increases the reference voltage signal output to the second digital-to-analog converter 36, thus increasing the reference voltage Vref2 and decreasing the value of Vout-Vref2. The digital controller 33 sends a digital signal to the third digital-to-analog converter 37, causing the third digital-to-analog converter 37 to generate a triangular wave analog signal with a voltage of V1. The difference between Vout-Vref2 and voltage V1 decreases, and voltage V1 approaches the value of Vout-Vref2 more quickly. The relationship between the two is unstable and more prone to flipping, increasing the flip frequency of the comparator. This increases the switching frequency of the voltage adjustment signal sent by the digital controller 33 to the output adjustment module 4, thereby increasing Vout and increasing the brightness of the pixels within the power supply area.

[0106] When a pixel within the power supply area needs to be darkened, the digital controller 33 reduces the reference voltage signal output to the second digital-to-analog converter 36, thus reducing the reference voltage Vref2 and increasing the value of Vout-Vref2. The digital controller 33 sends a digital signal to the third digital-to-analog converter 37, causing the third digital-to-analog converter 37 to generate a triangular wave analog signal with a voltage of V1. The difference between Vout-Vref2 and voltage V1 increases, and the difference between voltage V1 and Vout-Vref2 becomes larger in a shorter time. The relationship between the two becomes stable and less prone to flipping, thus reducing the flip frequency of the comparator. The switching frequency of the voltage adjustment signal sent by the digital controller 33 to the output adjustment module 4 decreases, resulting in a decrease in the output voltage Vout and a reduction in the brightness of the pixel within the power supply area.

[0107] This allows the output adjustment module 4 to possess the advantages of real-time control, fast response speed, and strong robustness. The output voltage Vout can promptly follow the changes in the reference voltage Vref2. The output adjustment module 4 can more actively adjust the output voltage Vout, ensuring that the output voltage Vout matches the brightness of each pixel on the display panel, reducing the power consumption and heat generation of the display panel, and improving energy utilization efficiency and display effect.

[0108] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein.

[0109] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A display panel control circuit, characterized in that, include: Power input module, used to generate rectified signals; A voltage regulator module, connected to the power input module, is used to receive the rectified signal and output a working power signal, so that the voltage of the working power signal fluctuates within a set range. A receiving module is used to receive pixel data from the display panel and output a voltage control signal based on the pixel data; An output adjustment module, connected to both the receiving module and the voltage regulator module, is used to adjust the output voltage of the working power signal output to the display panel according to the voltage control signal. The voltage control signal includes a first voltage control signal and a second voltage control signal with opposite phases; the output adjustment module includes a first field-effect transistor, a second field-effect transistor, an energy storage inductor, a filter capacitor, and a power output terminal; the gate of the first field-effect transistor is connected to the first voltage control signal, the first electrode is connected to the voltage regulator module, and the second electrode is connected to one end of the energy storage inductor; the gate of the second field-effect transistor is connected to the second voltage control signal, the first electrode is connected to one end of the energy storage inductor, and the second electrode is grounded; the other end of the energy storage inductor is connected to both one end of the filter capacitor and the power output terminal, and the other end of the filter capacitor is grounded; A load resistor, one end of which is connected to the output adjustment module, and the other end is grounded.

2. The display panel control circuit according to claim 1, characterized in that, The receiving module includes a first digital-to-analog converter and a first comparator; the input terminal of the first digital-to-analog converter is connected to the pixel data, and the output terminal is connected to the first input terminal of the first comparator; the second input terminal of the first comparator is connected to the output voltage, and the output terminal is connected to the output adjustment module.

3. The display panel control circuit according to claim 1, characterized in that, The receiving module includes a digital controller, an operational amplifier, a second comparator, a second digital-to-analog converter (DAC), and a third DAC. The digital controller generates a reference voltage signal and a comparison voltage signal based on the pixel data. The input terminal of the second DAC is connected to the reference voltage signal, and its output terminal is connected to the first input terminal of the operational amplifier. The second input terminal of the operational amplifier is connected to the output voltage, and its output terminal is connected to the first input terminal of the second comparator. The input terminal of the third DAC is connected to the comparison voltage signal, and its output terminal is connected to the second input terminal of the second comparator. The output terminal of the second comparator is connected to the digital controller, and one end of the digital controller is connected to the output adjustment module.

4. The display panel control circuit according to claim 1, characterized in that, The output adjustment module further includes a first inverting driver and a first non-inverting driver; the input terminal of the first inverting driver is connected to the voltage control signal, and the output terminal is connected to the gate of the first field-effect transistor; the input terminal of the first non-inverting driver is connected to the voltage control signal, and the output terminal is connected to the gate of the second field-effect transistor.

5. The display panel control circuit according to claim 1, characterized in that, The output adjustment module further includes a second inverting driver and a second non-inverting driver; the input terminal of the second non-inverting driver is connected to the voltage control signal, and the output terminal is connected to the gate of the first field-effect transistor; the input terminal of the second inverting driver is connected to the voltage control signal, and the output terminal is connected to the gate of the second field-effect transistor.

6. The display panel control circuit according to claim 1, characterized in that, The power input module includes a first rectification and filtering module, a power switch module, a transformer, a second rectification and filtering module, a voltage feedback module, and a PWM control module. The first rectification and filtering module receives the rectified signal and is connected to the input terminal of the transformer. One end of the power switch module is connected to the PWM control module, and the other end is connected to the input terminal of the transformer. The output terminal of the transformer is connected to the input terminal of the second rectification and filtering module, and the output terminal of the second rectification and filtering module is connected to the voltage regulator module.

7. The display panel control circuit according to claim 6, characterized in that, The transformer includes an input coil and an output coil arranged opposite to each other. The power switching module includes a third field-effect transistor. One end of the input coil is connected to the first rectifier and filter module, and the other end is connected to the first electrode of the third field-effect transistor. The gate of the third field-effect transistor is connected to the PWM control module, and the second electrode is grounded. The output coil is connected to the second rectifier and filter module.

8. The display panel control circuit according to claim 1, characterized in that, The voltage regulator module includes a voltage regulator capacitor, one end of which is connected to both the power input module and the output adjustment module, and the other end is grounded.

9. A display device, characterized in that, It includes a display panel and a display panel control circuit as described in any one of claims 1 to 8, wherein the display panel and the display panel control circuit are connected.

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