Brightness adaptive adjustment circuit and energy storage power supply

Abstract

The utility model relates to a brightness adaptive adjustment circuit and an energy storage power supply. Wherein the brightness self-adaptive adjustment circuit is connected with the display screen, and the brightness self-adaptive adjustment circuit comprises a driving module, a photosensitive module and a feedback module; the driving module is used for controlling the power supply to supply power to the display screen through the photosensitive module when the power supply is powered on; when the feedback signal output by the feedback module is received, the current of the display screen is adjusted according to the feedback signal; the photosensitive module is used for adjusting the self resistance value according to the brightness of ambient light when the display screen works; wherein the brightness of the ambient light is in negative correlation with the resistance value of the photosensitive module; the feedback module is used for collecting voltage at two ends of the photosensitive module and outputting a feedback signal to the driving module according to the voltage at two ends of the photosensitive module, so that the driving module adjusts the current of the display screen according to the feedback signal. According to the invention, the reliability and applicability of the equipment in various brightness environments can be improved.

Description

Technical Field

[0001] The present application belongs to the field of power electronics technology, and specifically relates to a brightness adaptive adjustment circuit and an energy storage power supply. Background Art

[0002] Currently, the display brightness of energy storage devices is typically set to a fixed level. In strong sunlight, the reflected ambient light from the insufficiently bright display can blur the displayed content. This presents a serious problem for users who need to constantly monitor the status of their energy storage devices. For example, users may be unable to accurately read critical information such as the current remaining battery level, charging status, or output power, hindering their ability to use and manage the energy storage device. At night, an overly bright display can emit strong light, potentially disrupting sleep. This is especially true for users who use energy storage devices in their bedrooms, as an overly bright screen can affect sleep quality, leading to insomnia, fatigue, and other issues. Utility Model Content

[0003] The embodiments of the present application provide a brightness adaptive adjustment circuit and an energy storage power supply to improve the reliability and applicability of the device in various brightness environments.

[0004] In a first aspect, an embodiment of the present application provides a brightness adaptive adjustment circuit, which is connected to a display screen and includes a driving module, a photosensitive module, and a feedback module; the driving module is respectively connected to the photosensitive module, the feedback module, the display screen, and the power supply, and the power supply is also connected to the display screen through the photosensitive module, and the photosensitive module is also connected to the feedback module; the driving module is used to control the power supply to supply power to the display screen through the photosensitive module when the power supply is powered on; and when receiving the feedback signal output by the feedback module, adjust the current of the display screen according to the feedback signal; the photosensitive module is used to adjust its own resistance according to the brightness of the ambient light when the display screen is working; wherein the brightness of the ambient light is negatively correlated with the resistance of the photosensitive module; the feedback module is used to collect the voltage across the photosensitive module, and output a feedback signal to the driving module based on the voltage across the photosensitive module, so that the driving module adjusts the current of the display screen according to the feedback signal.

[0005] In some embodiments, the photosensitive module includes a photoresistor R3; a first end of the photoresistor R3 is connected to the power supply and the feedback module, and a second end of the photoresistor R3 is connected to the driving module, the feedback module and the display screen respectively.

[0006] In some embodiments, the feedback module includes a sampling unit and a control unit; the sampling unit is connected to the control unit and the photosensitive module respectively, and the control unit is also connected to the driving module; the sampling unit is used to collect the voltage across the photosensitive module and amplify the voltage difference collected across the photosensitive module to obtain a first voltage signal; the control unit is used to generate the feedback signal based on the first voltage signal.

[0007] In some embodiments, the sampling unit includes a resistor R2, a resistor R4, a resistor R5, a resistor R6, and an amplifier U2B; the non-inverting input terminal of the amplifier U2B is connected to the photosensitive module through the resistor R4, and the non-inverting input terminal of the amplifier U2B is also grounded through the resistor R5. The inverting input terminal of the amplifier U2B is connected to the photosensitive module through the resistor R2, and the output terminal of the amplifier U2B is connected to the inverting input terminal of the amplifier U2B through the resistor R6. The output terminal of the amplifier U2B is also connected to the control unit.

[0008] In some embodiments, the control unit includes a single-chip microcomputer U3; one end of the single-chip microcomputer U3 is connected to the sampling unit, and the other end of the single-chip microcomputer U3 is connected to the driving module.

[0009] In some embodiments, the driving module includes a driving chip U1, an inductor L1, and a diode D19; the DIM pin of the driving chip U1 is connected to the feedback module, the VIN pin of the driving chip U1 is respectively connected to the cathode of the diode D19 and the power supply, the SW pin of the driving chip U1 is connected to the anode of the diode D19 and the first end of the inductor L1, the second end of the inductor L1 is connected to one end of the display screen, the CSN pin of the driving chip U1 is connected to the photosensitive module and the other end of the display screen, and the GND pin of the driving chip U1 is grounded.

[0010] In some embodiments, the driving module further includes a resistor R1 ; and the DIM pin of the driving chip U1 is connected to the feedback module through the resistor R1 .

[0011] In some embodiments, the driving module further includes a capacitor C1; the capacitor C1 is connected in parallel with the display screen.

[0012] In some embodiments, the driving module further includes a capacitor C5; one end of the capacitor C5 is respectively connected to the power supply, the VIN pin of the driving chip U1, and the photosensitive module, and the other end of the capacitor C5 is grounded.

[0013] In a second aspect, an embodiment of the present application provides an energy storage power supply, including a display screen and a brightness adaptive adjustment circuit as described above; the brightness adaptive adjustment circuit is connected to the display screen; the brightness adaptive circuit is used to adjust the current input to the display screen according to the brightness of the ambient light.

[0014] Different from the related technical solutions, the embodiment of the present application provides a brightness adaptive adjustment circuit and energy storage power supply. In which, the brightness adaptive adjustment circuit is connected to the display screen, and the brightness adaptive adjustment circuit includes a driving module, a photosensitive module, and a feedback module; the driving module is respectively connected to the photosensitive module, the feedback module, the display screen, and the power supply, and the power supply is also connected to the display screen through the photosensitive module, and the photosensitive module is also connected to the feedback module; the driving module is used to control the power supply to supply power to the display screen through the photosensitive module when the power supply is powered on; and when receiving the feedback signal output by the feedback module, adjust the current of the display screen according to the feedback signal; the photosensitive module is used to adjust its own resistance according to the brightness of the ambient light when the display screen is working; wherein the brightness of the ambient light is negatively correlated with the resistance of the photosensitive module; the feedback module is used to collect the voltage across the photosensitive module and output a feedback signal to the driving module according to the voltage across the photosensitive module, so that the driving module adjusts the current of the display screen according to the feedback signal. The embodiment of the present application can automatically adjust the brightness of the display screen according to the brightness of the ambient light. This ensures a comfortable visual experience for users in all lighting conditions. Whether in strong light, low light, or complex lighting environments, the display remains clearly visible. This improves the device's reliability and applicability in a variety of environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0016] Figure 1 This is a structural block diagram of a brightness adaptive adjustment circuit provided in one embodiment of the present application;

[0017] Figure 2 This is a structural block diagram of a feedback module provided in one embodiment of the present application;

[0018] Figure 3 1 is a schematic diagram of the circuit structure of a brightness adaptive adjustment circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0020] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0021] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0022] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object may be one or more.

[0023] See also Figure 1 , Figure 1 1 is a structural block diagram of a brightness adaptive adjustment circuit 100 provided in an embodiment of the present application.

[0024] An embodiment of the present application provides a brightness adaptive adjustment circuit 100 . The brightness adaptive adjustment circuit 100 is connected to a display screen 200 . The brightness adaptive adjustment circuit 100 includes a driving module 10 , a photosensitive module 20 , and a feedback module 30 .

[0025] The driving module 10 is respectively connected to the photosensitive module 20 , the feedback module 30 , the display screen 200 , and the power supply 300 . The power supply 300 is also connected to the display screen 200 through the photosensitive module 20 . The photosensitive module 20 is also connected to the feedback module 30 .

[0026] Specifically, the driver module 10 is configured to control the power supply 300 to supply power to the display screen 200 via the photosensitive module 20 when the power supply 300 is powered on. Upon receiving a feedback signal from the feedback module 30, the driver module 10 adjusts the current of the display screen 200 based on the feedback signal. The photosensitive module 20 is configured to adjust its resistance based on the brightness of the ambient light when the display screen 200 is operating; the brightness of the ambient light is negatively correlated with the resistance of the photosensitive module 20. The feedback module 30 is configured to collect the voltage across the photosensitive module 20 and output a feedback signal to the driver module 10 based on the voltage across the photosensitive module 20, so that the driver module 10 adjusts the current of the display screen 200 based on the feedback signal.

[0027] The power supply 300 may be a DC power supply, such as a battery (commonly available are lithium batteries, nickel-metal hydride batteries, etc.) or a stable DC power supply converted by a power adapter.

[0028] The feedback signal is a signal output by the feedback module 30 to the driving module 10, and is used to adjust the current of the display screen 200 to achieve adaptive adjustment of the brightness. Generally, the feedback signal is a PWM signal (Pulse Width Modulation).

[0029] Specifically, the feedback module 30 generates PWM signals with different duty cycles based on the voltage changes across the photosensitive module 20. The duty cycle refers to the proportion of time a high level is maintained within a cycle. For example, a voltage range can be set, and when the voltage across the photosensitive module is within different ranges, PWM signals with different duty cycles are generated accordingly. If the voltage across the photosensitive module 20 is low, indicating that the ambient light brightness is high, the feedback module 30 may generate a PWM signal with a high duty cycle; if the voltage across the photosensitive module 20 is high, indicating that the ambient light brightness is low, the feedback module 30 may generate a PWM signal with a low duty cycle. The driver module 10 then receives the PWM signal from the feedback module and adjusts the current output to the display based on the PWM signal's duty cycle. For example, when the PWM signal's duty cycle is high, the driver module 10 increases the output current, increasing the display brightness; when the PWM signal's duty cycle is low, the driver module 10 decreases the output current, reducing the display brightness.

[0030] In actual application, first, when the power supply 300 is turned on, the driving module 10 controls the power supply 300 to power the display screen 200 through the photosensitive module 20. At this time, current flows out of the power supply 300, passes through the photosensitive module 20 and flows into the display screen 200, so that the display screen 200 starts working.

[0031] Next, as display screen 200 begins operating, photosensitive module 20 adjusts its resistance based on the brightness of the surrounding light. As the ambient light increases, the resistance of photosensitive module 20 decreases accordingly; as the ambient light decreases, the resistance of photosensitive module 20 increases. Furthermore, during the day or when the ambient brightness is high, the resistance of photosensitive module 20 decreases, increasing the current flowing into display screen 200 and subsequently increasing the brightness of display screen 200. At night or when the ambient brightness is low, the resistance of photosensitive module 20 increases, decreasing the current flowing into display screen 200 and subsequently decreasing the brightness of display screen 200, thereby achieving an automatic display brightness adjustment circuit.

[0032] At the same time, the feedback module 30 continuously collects the voltage across the photosensitive module 20. Because the resistance of the photosensitive module 20 changes with the brightness of the ambient light, the voltage across the photosensitive module 20 also changes accordingly. For example, when the resistance of the photosensitive module 20 decreases, the voltage across it decreases; conversely, when the resistance increases, the voltage across it increases. The feedback module 30 generates a feedback signal based on the collected voltage changes across the photosensitive module 20.

[0033] Then, the feedback module 30 outputs the generated feedback signal to the driving module 10. The driving module 10 adjusts the magnitude of the current output to the display screen 200 according to the change of the feedback signal.

[0034] For example, if the feedback signal indicates that the ambient light brightness has increased, the driver module 10 will increase the current output to the display screen 200 to increase the brightness of the display screen 200 to adapt to the bright environment; if the feedback signal indicates that the ambient light brightness has decreased, the driver module 10 will reduce the current output to the display screen 200 to reduce the brightness of the display screen 200 to adapt to the dim environment.

[0035] The adaptive brightness adjustment circuit 100 provided in the embodiment of the present application can automatically adjust the brightness of the display screen according to the brightness of the ambient light. This provides the user with a comfortable visual experience under various lighting conditions. Whether in strong light, weak light, or complex lighting environments, the adaptive brightness adjustment circuit 100 ensures clear visibility of the display screen. This improves the reliability and applicability of the device in various environments. For example, in harsh environments such as outdoor adventures and industrial sites, the device's display screen can still operate normally and provide users with accurate information.

[0036] See also Figure 2 , Figure 2 It is a structural block diagram of the feedback module 30 provided in one embodiment of the present application.

[0037] In some embodiments, the feedback module 30 includes a sampling unit 31 and a control unit 32. The sampling unit 31 is connected to the control unit 32 and the photosensitive module 20, respectively. The control unit 32 is also connected to the driving module 10. Specifically, the sampling unit 31 is configured to collect the voltage across the photosensitive module 20 and amplify the voltage difference across the photosensitive module 20 to obtain a first voltage signal. The control unit 32 is configured to generate a feedback signal based on the first voltage signal.

[0038] The first voltage signal is a signal obtained by amplifying the voltage difference between the two ends of the photosensitive module 20 by the sampling unit 31 .

[0039] In this embodiment, the sampling unit 31 amplifies the voltage difference across the photosensitive module 20. The first voltage signal reflects the voltage variation caused by the resistance change of the photosensitive module under different ambient light conditions. The first voltage signal is transmitted to the control unit 32, which generates a feedback signal (e.g., a PWM signal) based on this signal and feeds it back to the driver module 10, thereby achieving current regulation and adaptive brightness adjustment of the display screen.

[0040] See also Figure 3 , Figure 3 FIG. 1 is a schematic diagram of the circuit structure of a brightness adaptive adjustment circuit 100 provided in an embodiment of the present application.

[0041] In some embodiments, the photosensitive module 20 includes a photoresistor R3 . A first end of the photoresistor R3 is connected to a power source 300 (e.g., a +12V DC power source) and a feedback module 30 , and a second end of the photoresistor R3 is connected to the driver module 10 , the feedback module 30 , and the display screen 200 .

[0042] The resistance of the photoresistor R3 is negatively correlated with the brightness of the ambient light. That is, the greater the brightness of the ambient light, the smaller the resistance of the photoresistor R3.

[0043] In some embodiments, the sampling unit 31 includes a resistor R2, a resistor R4, a resistor R5, a resistor R6, and an amplifier U2B. The non-inverting input of the amplifier U2B is connected to the photosensitive module 20 via the resistor R4, the non-inverting input of the amplifier U2B is also grounded via the resistor R5, the inverting input of the amplifier U2B is connected to the photosensitive module 20 via the resistor R2, the output of the amplifier U2B is connected to the inverting input of the amplifier U2B via the resistor R6, and the output of the amplifier U2B is also connected to the control unit 32.

[0044] In some embodiments, the control unit 32 includes a single-chip microcomputer U3 , wherein one end of the single-chip microcomputer U3 is connected to the sampling unit 31 , and the other end of the single-chip microcomputer U3 is connected to the driving module 10 .

[0045] In some embodiments, the driver module 10 includes a driver chip U1, an inductor L1, and a diode D19. The DIM pin of the driver chip U1 is connected to the feedback module 30, the VIN pin of the driver chip U1 is connected to the cathode of the diode D19 and the power supply 300, respectively. The SW pin of the driver chip U1 is connected to the anode of the diode D19 and the first end of the inductor L1. The second end of the inductor L1 is connected to one end of the display screen 200. The CSN pin of the driver chip U1 is connected to the other end of the photosensitive module 20 and the display screen 200. The GND pin of the driver chip U1 is grounded.

[0046] The driver chip U1 is a PT4115_BW4319845 or other chips capable of achieving the same function. The diode D19 can be a Schottky diode or other suitable diode.

[0047] In some embodiments, the driving module 10 further includes a resistor R1 , wherein the DIM pin of the driving chip U1 is connected to the feedback module 30 via the resistor R1 .

[0048] Specifically, the resistor R1 is used to limit the current of the feedback signal input to the driver chip U1.

[0049] In some embodiments, the driving module 10 further includes a capacitor C1 , wherein the capacitor C1 is connected in parallel with the display screen 200 .

[0050] Specifically, the capacitor C1 is used to average the input current of the power supply 300 and reduce the impact of the power supply 300 on the circuit.

[0051] In some embodiments, the driving module 10 further includes a capacitor C5 , one end of which is connected to the power supply 300 , the VIN pin of the driving chip U1 , and the photosensitive module 20 , and the other end of the capacitor C5 is grounded.

[0052] Specifically, the capacitor C5 is used to reduce the current ripple output to the display screen 200 .

[0053] The following Figure 3 The working principle of the adaptive brightness adjustment circuit 100 is described below.

[0054] First, in the adaptive brightness adjustment circuit 100, the driver chip U1, the inductor L1, and the photoresistor R3 form a self-oscillating continuous inductor current mode step-down constant current display brightness controller. When the VIN pin of the driver chip U1 is powered on, the initial current of the inductor L1 and the photoresistor R3 is zero, and the output current of the display 200 is zero. At this time, the output of the CS comparator (Current Sense Comparator) inside the driver chip U1 is high, the power tube switch inside the driver chip U1 is turned on, and the potential of the SW pin of the driver chip U1 is low. The current passes through the photoresistor R3, the display 200, the inductor L1, the power tube switch inside the driver chip U1, and flows from the VIN pin of the driver chip U1 to the ground.

[0055] At this time, a voltage difference VCSN is generated across the photoresistor R3.

[0056] According to the characteristics of driver chip U1, when (VIN-VCSN)>115mV, the output of the CS comparator inside driver chip U1 goes low, and the power switch inside driver chip U1 is turned off. At this time, current flows through inductor L1, photoresistor R3, display 200, and diode D19. When (VIN-VCSN)<85mV, the power switch inside driver chip U1 is turned back on. Where VIN is the voltage on the VIN pin of driver chip U1, and VCSN is the voltage difference across photoresistor R3. This results in the average current on display screen 200 when it is operating being:

[0057]

[0058] Wherein, Iout is the average current on the display screen 200, and R3 is the resistance value of the photoresistor R3.

[0059] Therefore, during the day or when the surrounding brightness is relatively high, the resistance of the photoresistor R3 becomes smaller, as shown in the above formula, the average current on the display screen 200 becomes larger, the current flowing into the display screen 200 becomes larger, and the brightness of the display screen 200 becomes larger. When at night or when the surrounding brightness is relatively low, the resistance of the photoresistor R3 becomes larger, as shown in the above formula, the average current on the display screen 200 becomes smaller, the current flowing into the display screen 200 becomes smaller, and the brightness of the display screen 200 becomes smaller, thereby achieving an automatic display brightness adjustment circuit.

[0060] Second, as Figure 3 As shown, the amplifier U2B collects the voltage VCSN across the photoresistor R3, then proportionally amplifies the output voltage (V_AD) through the resistors R6 and R2 and sends it to the microcontroller U3. The microcontroller U3 adjusts the duty cycle of the PWM signal sent to the driver chip U1 based on the collected voltage (V_AD).

[0061] Specifically, if the voltage across photoresistor R3 is low, indicating that the ambient light is bright, the feedback module 30 may generate a PWM signal with a large duty cycle. If the voltage across photoresistor R3 is high, indicating that the ambient light is dim, the feedback module 30 may generate a PWM signal with a small duty cycle. The driver module 10 then receives the PWM signal from the feedback module and adjusts the current output to the display based on the duty cycle of the PWM signal. For example, when the duty cycle of the PWM signal is large, the driver module 10 increases the output current, increasing the brightness of the display. When the duty cycle of the PWM signal is small, the driver module 10 decreases the output current, reducing the brightness of the display.

[0062] The adaptive brightness adjustment circuit 100 provided in the embodiment of the present application can automatically adjust the brightness of the display screen according to the brightness of the ambient light. This provides the user with a comfortable visual experience under various lighting conditions. Whether in strong light, weak light, or complex lighting environments, the adaptive brightness adjustment circuit 100 ensures clear visibility of the display screen. This improves the reliability and applicability of the device in various environments. For example, in harsh environments such as outdoor adventures and industrial sites, the device's display screen can still operate normally and provide users with accurate information.

[0063] The present invention also provides an energy storage power supply, including a display screen and the aforementioned adaptive brightness adjustment circuit 100. The adaptive brightness adjustment circuit 100 is connected to the display screen and is configured to adjust the current input to the display screen according to the brightness of the ambient light.

[0064] The structure and working principle of the adaptive brightness adjustment circuit 100 can be found in the above description and will not be elaborated here.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A brightness adaptive adjustment circuit, characterized in that: The brightness adaptive adjustment circuit is connected to the display screen, and the brightness adaptive adjustment circuit includes a driving module, a photosensitive module, and a feedback module; The driving module is respectively connected to the photosensitive module, the feedback module, the display screen, and the power supply. The power supply is also connected to the display screen through the photosensitive module. The photosensitive module is also connected to the feedback module. The driving module is used to control the power supply to supply power to the display screen through the photosensitive module when the power supply is powered on; and when receiving the feedback signal output by the feedback module, adjust the current of the display screen according to the feedback signal; The photosensitive module is used to adjust its own resistance value according to the brightness of the ambient light when the display screen is working; wherein the brightness of the ambient light and the resistance value of the photosensitive module are negatively correlated; The feedback module is used to collect the voltage across the photosensitive module and output a feedback signal to the driving module according to the voltage across the photosensitive module, so that the driving module adjusts the current of the display screen according to the feedback signal.

2. The brightness adaptive adjustment circuit according to claim 1, characterized in that: The photosensitive module includes a photoresistor R3; A first end of the photoresistor R3 is connected to the power supply and the feedback module, and a second end of the photoresistor R3 is connected to the driving module, the feedback module and the display screen respectively.

3. The brightness adaptive adjustment circuit according to claim 1, wherein: The feedback module includes a sampling unit and a control unit; The sampling unit is connected to the control unit and the photosensitive module respectively, and the control unit is also connected to the driving module; The sampling unit is used to collect the voltage across the photosensitive module and amplify the voltage difference between the two ends of the photosensitive module to obtain a first voltage signal; The control unit is configured to generate the feedback signal according to the first voltage signal.

4. The adaptive brightness adjustment circuit according to claim 3, wherein: The sampling unit includes a resistor R2, a resistor R4, a resistor R5, a resistor R6, and an amplifier U2B; The non-inverting input terminal of the amplifier U2B is connected to the photosensitive module through the resistor R4, and the non-inverting input terminal of the amplifier U2B is also grounded through the resistor R5. The inverting input terminal of the amplifier U2B is connected to the photosensitive module through the resistor R2, and the output terminal of the amplifier U2B is connected to the inverting input terminal of the amplifier U2B through the resistor R6. The output terminal of the amplifier U2B is also connected to the control unit.

5. The brightness adaptive adjustment circuit according to claim 3, characterized in that: The control unit includes a single chip microcomputer U3; One end of the single-chip microcomputer U3 is connected to the sampling unit, and the other end of the single-chip microcomputer U3 is connected to the driving module.

6. The brightness adaptive adjustment circuit according to claim 1, wherein: The driving module includes a driving chip U1, an inductor L1, and a diode D19; The DIM pin of the driver chip U1 is connected to the feedback module, the VIN pin of the driver chip U1 is respectively connected to the cathode of the diode D19 and the power supply, the SW pin of the driver chip U1 is connected to the anode of the diode D19 and the first end of the inductor L1, the second end of the inductor L1 is connected to one end of the display screen, the CSN pin of the driver chip U1 is connected to the photosensitive module and the other end of the display screen, and the GND pin of the driver chip U1 is grounded.

7. The brightness adaptive adjustment circuit according to claim 6, characterized in that: The driving module further includes a resistor R1; The DIM pin of the driver chip U1 is connected to the feedback module through the resistor R1.

8. The brightness adaptive adjustment circuit according to claim 6, characterized in that: The driving module further includes a capacitor C1; The capacitor C1 is connected in parallel with the display screen.

9. The brightness adaptive adjustment circuit according to claim 6, wherein: The driving module further includes a capacitor C5; One end of the capacitor C5 is connected to the power supply, the VIN pin of the driver chip U1, and the photosensitive module respectively, and the other end of the capacitor C5 is grounded.

10. An energy storage power supply, characterized in that: comprising a display screen and a brightness adaptive adjustment circuit according to any one of claims 1 to 9; The brightness adaptive adjustment circuit is connected to the display screen; The brightness adaptive circuit is used to adjust the current input to the display screen according to the brightness of the ambient light.

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