Battery electric quantity display circuit and power supply device

Abstract

The utility model discloses a battery electric quantity display circuit and a power supply device, and the battery electric quantity display circuit comprises an electric quantity detection circuit which is used for detecting the electric quantity of a battery body; the touch sensing circuit is used for sensing human body touch and generating a digital signal; the main control chip is in communication connection with the electric quantity detection circuit and the touch sensing circuit and is used for acquiring electric quantity information detected by the electric quantity detection circuit; the display driving circuit is used for driving the display screen to display the electric quantity of the battery body. According to the utility model, the electric quantity of the battery body is detected in real time through the electric quantity detection circuit, so that accurate electric quantity parameters are provided for the main control chip. The touch sensing circuit is used for sensing human body touch and generating digital signals, the main control chip obtains electric quantity information detected by the electric quantity detection circuit after receiving the digital signals and transmits the electric quantity information to the display driving circuit, and the display driving circuit controls the display screen to display battery electric quantity information. Therefore, sound and vibration interference caused by mechanical key operation can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies for photographic equipment, and particularly relates to a battery power display circuit and a power supply device. Background Art

[0002] As an important energy source, the accurate display of the battery's power information is crucial for users.

[0003] Currently, most battery power display solutions for powering photographic equipment use mechanical buttons and a certain number of LED lights to display the power. In this solution, the user needs to apply a certain pressure to the button to trigger the circuit and activate the main control, so that the LED lights turn on, and the power information is displayed by the number of lit LED lights.

[0004] However, this solution still has deficiencies. The mechanical buttons will produce sound or vibration during operation, which may cause interference when shooting video or audio products. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a battery power display circuit, aiming to solve the problem that the existing battery uses mechanical buttons to view the power, which will produce sound or vibration and cause interference to shooting video or audio products.

[0006] To achieve the above object, the utility model proposes a battery power display circuit, where the battery is used to supply power to a photographic equipment, and the battery power display circuit includes:

[0007] A power detection circuit, electrically connected to the battery body, for detecting the power information of the battery body;

[0008] A touch sensing circuit, which is used to sense human touch and generate a digital signal;

[0009] A main control chip, communicatively connected to the power detection circuit and the touch sensing circuit respectively, for obtaining the power information detected by the power detection circuit when receiving the digital signal of the touch sensing circuit;

[0010] A display driving circuit, connected to the main control chip and the display screen respectively, for driving the display screen to display the power of the battery body under the control of the main control chip.

[0011] In some embodiments, the main control chip includes a first signal input terminal;

[0012] The touch sensing circuit includes:

[0013] A touch detection circuit, for generating an analog signal when detecting human touch;

[0014] The sensing chip is communicatively connected to the touch detection circuit and the first signal input end of the main control chip. The sensing chip is configured to convert the analog signal into the digital signal and feedback it to the first signal input end of the main control chip.

[0015] In some embodiments, the touch detection circuit includes:

[0016] A touch sensing device, configured to sense a human touch signal;

[0017] A filtering circuit, electrically connected between the touch sensing device and the sensing chip, configured to filter the touch signal fed back by the touch sensing device.

[0018] In some embodiments, the filtering circuit includes:

[0019] A first capacitor, one end of the first capacitor is electrically connected to the common end of the sensing chip and grounded;

[0020] A first resistor, one end of the first resistor is electrically connected to the other end of the first capacitor and electrically connected to the second signal input end of the sensing chip, and the other end of the first resistor is electrically connected to the touch sensing device.

[0021] In some embodiments, the display driving circuit includes:

[0022] A control circuit, the control end of the control circuit is communicatively connected to the main control chip, the input end of the control circuit is connected to a power supply, and the output end is electrically connected to the display screen. The control circuit is configured to control the working state of the display screen according to the control signal of the main control chip;

[0023] A display interface circuit, communicatively connected to the data transmission end of the main control chip, configured to transmit the power information obtained by the main control chip to the display screen.

[0024] In some embodiments, the control circuit includes:

[0025] A switch module, electrically connected between the input end and the output end of the control circuit, configured to control the power off or on of the display screen;

[0026] A switch driving module, connected to the control end of the control circuit and the switch module, configured to drive the switch module to work under the control of the main control chip.

[0027] In some embodiments, the main control chip includes a first control end;

[0028] The switch module includes:

[0029] A first switching transistor, the source of the first switching transistor is connected to the input end of the control circuit, and the drain is electrically connected to the output end of the control circuit;

[0030] The switching drive module includes:

[0031] A second switching transistor, the drain of the second switching transistor is electrically connected to the gate of the first switching transistor, the gate of the second switching transistor is electrically connected to the control end of the control circuit, and the source of the second switching transistor is grounded.

[0032] In some embodiments, the power detection circuit includes a detection chip, and the detection chip is electrically connected to the battery body for detecting the input power and output power of the battery body;

[0033] The detection chip is communicatively connected to the main control chip for feeding back the input power and the output power of the battery body.

[0034] In some embodiments, the touch detection circuit further includes a restart circuit, and the restart circuit includes;

[0035] A third switching transistor, the source of the third switching transistor is connected to a power source, and the drain of the third switching transistor is connected to the power supply terminal of the detection chip;

[0036] A fourth switching transistor, the base of the fourth switching transistor is electrically connected to the main control chip, the emitter of the fourth switching transistor is electrically connected to the source of the third switching transistor, and the collector of the fourth switching transistor is electrically connected to the gate of the third switching transistor and grounded.

[0037] The present invention further provides a power supply device for supplying power to a photographic device, including:

[0038] A housing provided with at least one power interface for electrically connecting an external device to input or output electric energy;

[0039] A battery body disposed within the housing;

[0040] A display screen, at least partially exposed outside the housing;

[0041] And, the above-mentioned battery power display circuit, and the touch sensing circuit has a touch sensing device at least partially exposed outside the housing.

[0042] In the technical solution of this embodiment, the power detection circuit is used to detect the power of the battery body in real time, so as to provide the power parameter of the battery body to the main control chip. The touch sensing circuit is used to sense human touch and generate a digital signal. After receiving the digital signal, the main control chip obtains the power information detected by the power detection circuit and transmits the power information to the display driving circuit. The display driving circuit controls the display screen to display the battery power information, thus eliminating the sound and vibration interference caused by mechanical button operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 FIG. is a schematic diagram of the module electrical connection of the battery power display circuit in an embodiment of the present invention;

[0044] Figure 2 FIG. is the circuit diagram of the battery power display circuit in an embodiment of the present invention;

[0045] Figure 3 FIG. is the structural diagram of the main control chip in an embodiment of the present invention;

[0046] Figure 4 FIG. is a schematic diagram of the module electrical connection of the battery power display circuit in another embodiment of the present invention;

[0047] Figure 5 FIG. is the structural diagram of the power supply device in an embodiment of the present invention.

[0048] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS:

[0049] 100, power detection circuit; 102, detection chip; 200, touch sensing circuit; 202, touch detection circuit; 204, touch sensing device; 206, filtering circuit; C1, first capacitor; R1, first resistor; U2, induction chip; KEY2, second signal input terminal; U1, main control chip; KEY1, first signal input terminal; SDA / SCL, data transmission terminal; EN9, first control terminal; 500, restart circuit; Q3, third switching tube; Q4, fourth switching tube; 300, display driving circuit; 310, control circuit; EN, control terminal of the control circuit; 311, input terminal of the control circuit; VDD, output terminal of the control circuit; 312, switching module; Q1, first switching tube; 314, switching drive module; Q2, second switching tube; 320, display interface circuit; 400, housing; 400a, power interface; 410, battery body;

[0050] 420, display screen.

[0051] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] The following will clearly and completely describe the solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0054] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0055] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0056] Refer to Figure 1 , Figure 1 which is a schematic diagram of the module electrical connection of the battery power display circuit in an embodiment of the present invention.

[0057] The embodiments of the present invention provide a battery power display circuit. The battery is used to supply power to a photographic device. The battery power display circuit includes:

[0058] A power detection circuit 100, electrically connected to the battery body 410, for detecting the power information of the battery body;

[0059] A touch sensing circuit 200, which is used to sense human touch and generate a digital signal;

[0060] The main control chip U1 is respectively communicatively connected to the power detection circuit 100 and the touch sensing circuit 200, and is used to obtain the power information detected by the power detection circuit 100 when receiving the digital signal from the touch sensing circuit 200;

[0061] The display driving circuit 300 is respectively connected to the main control chip U1 and the display screen 420, and is used to drive the display screen 420 to display the power of the battery body under the control of the main control chip U1.

[0062] In this embodiment, the power detection circuit 100, the touch sensing circuit 200, the main control chip U1 and the display driving circuit 300 each perform their own functions to jointly achieve the accurate display of the battery power.

[0063] The power detection circuit 100 is mainly used to be electrically connected to the battery body 410. Specifically, it can be respectively connected to the positive and negative electrodes of the battery body 410 through two detection terminals to detect the input power and output power of the battery. Then, the two obtained data are operated to accurately obtain the power information (wherein, the working mode of the power detection circuit 100 can be set to the mode of real-time detection and operation, and when the main control chip U1 executes the program of obtaining power information, the power parameter can be fed back in the first time). In terms of device selection, the power detection circuit 100 can adopt different types of power sensors, such as Hall effect sensors, resistor dividers, etc.

[0064] The touch sensing circuit 200 is used to sense human touch and generate digital signals. Compared with traditional mechanical buttons, the touch sensing circuit 200 can be operated without the user applying physical pressure and will not generate sound or vibration, thus avoiding interference when shooting video or audio products. Among them, the touch sensing circuit 200 can adopt a capacitive touch sensor or a resistive touch sensor. Exemplarily, taking the capacitive touch sensor as an example, this sensor senses touch by detecting the capacitance change caused by the approach of a human finger or other conductive object.

[0065] The main control chip U1 in this embodiment is respectively communicatively connected to the power detection circuit 100 and the touch sensing circuit 200.

[0066] The main control chip U1 is mainly used to execute the corresponding power information acquisition program when receiving the digital signal from the touch sensing circuit 200, and communicate with the power detection circuit 100 at the same time to obtain the power information from the power detection circuit 100 and transmit this information to the display driving circuit 300. As for the selection of the main control chip U1 device, there are many types, for example, different models of microcontrollers or application-specific integrated circuits (ASICs) can be selected.

[0067] The display driving circuit 300 is respectively communicatively connected to the main control chip U1 and the display screen 420, and drives the display screen 420 to display the power of the battery body 410 under the control of the main control chip U1. Among them, the display driving circuit 300 can select different types of display controller chips, and the display screen 420 can also adopt different display technologies such as LCD and OLED.

[0068] When the battery power display circuit in this embodiment is in a state without user operation, the system enters the standby mode. To save battery power, the main control chip U1, the display driving circuit 300, and the touch sensing circuit 200 are all in the low-power detection state. This means that they only maintain the minimum operation to ensure that they can respond to user operations in a timely manner.

[0069] In this state, the power detection circuit 100 keeps running. The power detection circuit 100 detects the power of the battery in real time, by detecting the input power and output power of the battery, and performing operations on the data to obtain the current power information. Although other circuits are in the low-power state, the power detection circuit 100 can still provide accurate power information (of course, in some cases, the power detection circuit 100 can also enter the low-power mode, that is, the standby mode; this situation includes but is not limited to the situation where the battery power is low).

[0070] When the user touches the touch sensing circuit 200, the touch sensing circuit 200 detects the touch and generates a corresponding digital signal. This signal is transmitted to the main control chip U1, and the main control chip U1 is immediately awakened from the low-power state and executes the power information acquisition program to obtain the power information that has been detected and calculated in real time by the power detection circuit 100 (the power information can be detected and calculated in real time by the power detection circuit 100 and stored in the register for the main control chip U1 to directly call this parameter when executing the power information acquisition program).

[0071] After the main control chip U1 obtains the power information, it transmits the data to the display driving circuit 300. The display driving circuit 300 drives the display screen 420 to work under the control of the main control chip U1 and displays the current battery power. The display screen 420 will display the corresponding power percentage value or graphical representation according to the received power information, enabling the user to intuitively understand the battery power situation.

[0072] When the touch sensing circuit 200 does not sense the user's touch signal, the touch sensing circuit 200 no longer generates a digital signal. After the main control chip U1 detects no operation signal for a period of time (for example, 10 seconds, 15 seconds), it will execute the standby program, that is, re-enter the low-power mode. At the same time, the display driving circuit 300 stops working, and the display screen 420 goes off, thereby further saving battery power. Through the above technical solution, the embodiment of the present utility model can effectively overcome the shortcomings of traditional mechanical buttons and provides a more convenient and intuitive battery power display method. The use of the touch sensing circuit 200 eliminates the sound and vibration interference caused by mechanical button operations, and is particularly suitable for occasions of shooting video or audio products. In addition, the touch operation without applying physical pressure improves the user's operation experience and is suitable for application in various usage environments.

[0073] In the technical solution of this embodiment, the power detection circuit 100 detects the power of the battery body 410 in real time to provide accurate power parameters to the main control chip U1. The touch sensing circuit 200 is used to sense human touch and generate a digital signal. After receiving the digital signal, the main control chip U1 obtains the power information detected by the power detection circuit 100 and transmits the power information to the display driving circuit 300, and the display driving circuit 300 controls the display screen 420 to display the battery power information. In this way, the use of the touch sensing circuit 200 eliminates the sound and vibration interference caused by mechanical button operations, and is particularly suitable for occasions of shooting video or audio products. In addition, the touch operation without applying physical pressure improves the user's operation experience and is suitable for application in various usage environments.

[0074] Refer to Figure 2 and Figure 3 , Figure 2 is the circuit diagram of the battery power display circuit in an embodiment of the present utility model, Figure 3 is the structure diagram of the main control chip U1 in an embodiment of the present utility model.

[0075] In this embodiment, the main control chip U1 includes a first signal input terminal KEY1;

[0076] The touch sensing circuit 200 includes:

[0077] A touch detection circuit 202 for generating an analog signal when detecting human touch;

[0078] An induction chip U2, which is communicatively connected to the touch detection circuit 202 and the first signal input terminal KEY1 of the main control chip U1. The induction chip U2 is used to convert the analog signal into the digital signal and feedback it to the first signal input terminal KEY1 of the main control chip U1.

[0079] In this embodiment, the main control chip U1 includes a first signal input terminal KEY1. The touch sensing circuit 200 mainly includes a touch detection circuit 202 and a sensing chip U2. The touch detection circuit 202 is used to generate an analog signal when detecting a human body capacitance. Specifically, when the user touches the touch detection circuit 202, the change of the human body capacitance is sensed by the touch detection circuit 202 and converted into a corresponding analog signal.

[0080] The sensing chip U2 is communicatively connected to the touch detection circuit 202 and the first signal input terminal KEY1 of the main control chip U1. After receiving the analog signal generated by the touch detection circuit 202, the sensing chip U2 converts the analog signal into a digital signal. Then, the sensing chip U2 feeds back the generated digital signal to the first signal input terminal KEY1 of the main control chip U1. After receiving the digital signal through the first signal input terminal KEY1, the main control chip U1 wakes up and obtains the current battery power information for further processing and display.

[0081] Regarding the acquisition of the digital signal, taking the capacitive touch sensor as an example, this kind of sensor senses the touch by detecting the capacitance change caused by the approach of a human finger or other conductive object. When a finger approaches the sensor, it will cause a change in capacitance, and the touch sensing circuit 200 detects this change. After the touch sensing circuit 200 detects the change in capacitance or resistance, it is necessary to convert these analog signals into digital signals. This is usually achieved through an analog-to-digital converter (ADC). The ADC converts the analog signal output by the sensor into a corresponding digital signal. For example, the capacitance change is converted into a corresponding digital value, and thus the digital signal is obtained.

[0082] In the initial state of the battery power display circuit of this embodiment, the main control chip U1, the display driving circuit 300, and the touch sensing circuit 200 are in a low-power standby state to save battery power. The power detection circuit 100 still remains in an operating state to monitor the battery power in real time.

[0083] When the user touches the touch detection circuit 202, the touch detection circuit 202 senses the change of the human body capacitance and generates a corresponding analog signal. After receiving the analog signal, the sensing chip U2 converts it into a digital signal and sends the digital signal to the first signal input terminal KEY1 of the main control chip U1 through the communication connection.

[0084] After the main control chip U1 receives the digital signal, it wakes up from the low-power state and obtains the power information provided by the power detection circuit 100 in real time. Then, the main control chip U1 transmits the power information to the display driving circuit 300. Under the control of the main control chip U1, the display driving circuit 300 drives the display screen 420 to display the current battery power. The display screen 420 will display the corresponding power percentage or graphical representation according to the received power information, enabling the user to intuitively understand the battery power situation.

[0085] When the user no longer touches the touch detection circuit 202, the touch sensing circuit 200 stops generating signals. After the main control chip U1 does not detect a new touch signal for a period of time, it will re-enter the low-power standby state. The display driving circuit 300 stops working and the display screen 420 goes off, thus further saving battery power. And the power detection circuit 100 still remains in the working state and continues to detect the battery power in real time.

[0086] Through the above technical solution, this embodiment realizes an efficient battery power display circuit. The touch sensing circuit 200 generates an analog signal by detecting the change in human body capacitance, and converts the analog signal into a digital signal through the sensing chip U2, thus avoiding the sound and vibration interference brought by traditional mechanical buttons. This design is particularly suitable for occasions that require a quiet environment, such as video or audio recording.

[0087] In addition, after the main control chip U1 receives the digital signal, it can timely obtain the power information provided by the power detection circuit 100 and display it on the display screen 420 through the display driving circuit 300. This design not only improves the accuracy and reliability of power display, but also greatly enhances the user's operation experience.

[0088] Continue to refer to Figure 2 , in this embodiment, the touch detection circuit 202 includes:

[0089] A touch sensing device 204 for sensing human touch signals;

[0090] A filtering circuit 206 electrically connected between the touch sensing device and the sensing chip U2 for filtering the touch signals fed back by the touch sensing device.

[0091] In this embodiment, the touch detection circuit 202 further includes a touch sensing device 204 and a filtering circuit 206. The touch sensing device 204 is used to sense human touch signals. When the user touches the touch sensing device 204, the change in human body capacitance will be detected by the touch sensing device 204 and corresponding touch signals will be generated.

[0092] The filtering circuit 206 is electrically connected between the touch sensing device 204 and the sensing chip U2. Its main function is to filter the touch signals fed back by the touch sensing device 204. Since touch signals may be affected by external environmental noise, electromagnetic interference, and other clutter signals during generation, directly transmitting unfiltered touch signals may lead to misjudgment or signal instability. Therefore, the filtering circuit 206 plays a key role here, capable of effectively filtering out these interference signals, making the signals transmitted to the sensing chip U2 purer and more stable.

[0093] Without the filtering circuit 206, the touch signals generated by the touch detection circuit 202 may contain a large amount of noise and interference. These noise and interference may come from environmental electromagnetic interference, power supply noise, interference from other electronic devices, etc. When the sensing chip U2 receives a signal containing noise, it may produce misjudgment, causing the system to mistakenly think that the user has touched the sensing device, thus resulting in incorrect operations. The specific manifestations are problems such as unstable touch signals, false triggers, or missed triggers.

[0094] In this embodiment, by setting the filtering circuit 206, the touch signals will undergo filtering processing before being transmitted to the sensing chip U2. The filtering circuit 206 can effectively filter out high-frequency noise and low-frequency interference, making the signals purer. This not only improves the stability and accuracy of the touch signals but also reduces the probability of misjudgment. The filtered touch signals are smoother. After being transmitted to the sensing chip U2, they can accurately reflect the actual operations of the user, improving the reliability of the system and the user experience.

[0095] By adding the filtering circuit 206, the touch detection circuit 202 of this embodiment can significantly improve the quality of touch signals. The application of the filtering circuit 206 effectively filters out the noise and interference in the touch signals, making the signal transmission more stable and accurate. In this way, the sensing chip U2 can receive a purer and more accurate digital signal, ensuring that the main control chip U1 can make correct responses according to the real touch situation. Combined with the battery power detection circuit 100 and the display driving circuit 300, the battery power display circuit of this embodiment can still work efficiently and accurately in various complex environments.

[0096] Continue to refer to Figure 2 , in this embodiment, the filtering circuit 206 includes:

[0097] The first capacitor C1, one end of the first capacitor C1 is electrically connected to the common terminal of the sensing chip U2 and is grounded;

[0098] The first resistor R1, one end of the first resistor R1 is electrically connected to the other end of the first capacitor C1 and is electrically connected to the second signal input terminal KEY2 of the sensing chip U2, and the other end of the first resistor R1 is electrically connected to the touch sensing device 204.

[0099] In this embodiment, the filter circuit 206 is composed of a first capacitor C1 and a first resistor R1 to implement filtering processing of the touch signal. Specifically, one end of the first capacitor C1 is electrically connected to the common terminal of the sensing chip U2 and grounded. One end of the first resistor R1 is electrically connected to the other end of the first capacitor C1 and is also electrically connected to the second signal input terminal KEY2 of the sensing chip U2. The other end of the first resistor R1 is electrically connected to the touch sensing device 204.

[0100] This circuit design forms an RC (resistor-capacitor) filter. The main function of the RC filter is to perform low-pass filtering on the input signal, that is, to allow low-frequency signals to pass through while attenuating high-frequency noise and interference. The combination of the first capacitor C1 and the first resistor R1 can effectively filter out the high-frequency components in the touch signal, making the signal transmitted to the sensing chip U2 more stable and pure.

[0101] During the working process, when the touch sensing device 204 detects a human touch, a corresponding touch signal is generated. This touch signal first passes through the first resistor R1 connected to the touch sensing device 204. Due to the characteristics of the resistor, there will be a certain degree of voltage drop and delay when the signal passes through the resistor, which helps to buffer the sudden high-frequency noise.

[0102] Next, the signal enters the first capacitor C1. The characteristics of the capacitor enable it to store and release charges. Specifically, the capacitor presents a large impedance to rapidly changing signals (i.e., high-frequency signals), thereby effectively attenuating these high-frequency components. At the same time, the capacitor presents a small impedance to slowly changing signals (i.e., low-frequency signals) and allows these signals to pass through.

[0103] Finally, the filtered signal is output from the other end of the first capacitor C1 and is transmitted to the second signal input terminal KEY2 of the sensing chip U2. At this time, the high-frequency noise and interference in the signal have been effectively filtered out, and the signal received by the sensing chip U2 is more stable and pure, and can accurately reflect the user's touch operation.

[0104] In this embodiment, by adopting the filter circuit 206 including the first capacitor C1 and the first resistor R1, the touch detection circuit 202 of this embodiment can significantly improve the quality of the touch signal. The RC low-pass filtering characteristics of the filter circuit 206 effectively filter out the high-frequency noise and interference in the touch signal, making the signal transmission more stable and accurate. This design not only improves the reliability of touch sensing, but also reduces the occurrence of false triggers and missed triggers, and improves the user's operation experience.

[0105] Continue to refer to Figure 2 , in this embodiment, the display driving circuit 300 includes:

[0106] A control circuit, the control terminal EN of the control circuit is communicatively connected to the main control chip U1, the input terminal 311 of the control circuit is connected to a power supply, and the output terminal is electrically connected to the display screen 420. The control circuit controls the working state of the display screen 420 according to the control signal of the main control chip U1;

[0107] A display interface circuit 320, which is communicatively connected to the data transmission terminals SDA / SCL of the main control chip U1, and is used for transmitting the power information obtained by the main control chip U1 to the display screen 420.

[0108] In this embodiment, the display driving circuit 300 includes a control circuit and a display interface circuit 320. The control terminal EN of the control circuit is communicatively connected to the main control chip U1, the input terminal is connected to a power supply, and the output terminal is electrically connected to the display screen 420. The control circuit controls the working state of the display screen 420 according to the control signal of the main control chip U1, including turning on or off the display screen 420.

[0109] The display interface circuit 320 is communicatively connected to the data transmission terminals SDA / SCL of the main control chip U1, and is used for transmitting the power information obtained by the main control chip U1 to the display screen 420. Through the display interface circuit 320, the main control chip U1 can send the power information provided by the power detection circuit 100 to the display screen 420, and the display screen 420 can display the current power of the battery in real time for the user to view.

[0110] In the normal working state, when the user touches the touch sensing device 204, the main control chip U1 is awakened from the low power consumption mode and obtains the power information detected and calculated by the power detection circuit 100. The data transmission terminals SDA / SCL of the main control chip U1 transmit the power information to the display screen 420 through the display interface circuit 320. At the same time, the control circuit will receive the control signal of the main control chip U1 and turn on the display screen 420, so as to display the current power information on the display screen 420.

[0111] In the case of no user operation, in order to save battery power, the display driving circuit 300 will enter the screen sleep mode. In this mode, the main control chip U1 monitors the states of the touch sensing device 204 and the power detection circuit 100. When no user touch operation is detected for a period of time, the main control chip U1 sends a sleep signal to the control circuit.

[0112] After receiving the sleep signal, the control circuit will gradually reduce the brightness of the display screen 420 and finally turn off the display screen 420 to make it enter the sleep state. At this time, the display screen 420 no longer displays the power information, thereby reducing unnecessary power consumption.

[0113] However, the power detection circuit 100 still remains in an operating state, continuously monitoring the battery power. Once a user touch operation is detected, the main control chip U1 will be immediately awakened, and the display screen 420 will be re-lit to show the current power information. This design not only saves electric energy but also ensures that users can quickly check the battery power when needed.

[0114] Continuing to refer to Figure 2 , in this embodiment, the OLED switch circuit includes:

[0115] A switch module 312, electrically connected between the input terminal 311 of the control circuit and the output terminal VDD of the control circuit, for controlling the power-off or power-on of the display screen 420;

[0116] A switch driving module 314, electrically connected to the control terminal EN of the control circuit and the switch module 312, for driving the switch module 312 to work under the control of the main control chip U1.

[0117] In this embodiment, the OLED switch circuit includes a switch module 312 and a switch driving module 314. The switch module 312 is electrically connected between the input terminal 311 and the output terminal of the control circuit, for controlling the power-off or power-on of the display screen 420. Through simple switching operations, the switch module 312 can control the power-on and power-off states of the display screen 420.

[0118] The switch driving module 314 is electrically connected to the main control chip U1 and the switch module 312. Its main function is to drive the switch module 312 to work under the control of the main control chip U1. The switch driving module 314 is similar to a "small controls large" design, controlling a larger current or voltage through a smaller control signal, thereby achieving precise control of the power supply of the display screen 420. This design ensures the stable operation of the system in various working states.

[0119] During the working process, when the user touches the touch sensing device 204, the main control chip U1 wakes up from the low-power mode and obtains the current power information. The main control chip U1 sends a control signal through the switch driving module 314 to drive the switch module 312 to turn on the power, and the control circuit then starts to work to light up the display screen 420.

[0120] When the user stops the operation and after a period of time, the main control chip U1 monitors that there is no touch signal, and then sends a sleep signal to the switch driving module 314. After receiving the signal, the switch driving module 314 drives the switch module 312 to disconnect the power supply, making the display screen 420 enter the sleep state, thereby saving electric energy.

[0121] By adding an OLED switch circuit, this embodiment can more efficiently control the power state of the display screen 420. The introduction of the switch module 312 realizes reliable control of the power supply of the display screen 420, ensuring that the power supply can be quickly turned on when needed and timely turned off when not needed, reducing unnecessary power consumption.

[0122] Continue to refer to Figure 2 and Figure 3 In this embodiment, the main control chip U1 includes a first control terminal EN9;

[0123] The switch module 312 includes:

[0124] The first switch tube Q1, the source of the first switch tube Q1 is connected to the input end 311 of the control circuit, and the drain is electrically connected to the output end VDD of the control circuit;

[0125] The switch driving module 314 includes:

[0126] The second switch tube Q2, the drain of the second switch tube Q2 is electrically connected to the gate of the first switch tube Q1, the gate of the second switch tube Q2 is electrically connected to the control terminal EN of the control circuit 310, and the source of the second switch tube Q2 is grounded.

[0127] In this embodiment, the main control chip U1 includes a first control terminal EN9. The switch module 312 includes the first switch tube Q1, and the switch driving module 314 includes the second switch tube Q2.

[0128] Among them, the first switch tube Q1 can be a P-type MOS tube, its source is connected to the input end 311 of the control circuit, and the drain is electrically connected to the output end VDD of the control circuit. In the initial state, the source and gate of the first switch tube Q1 are connected to the power supply 3V3 (because the input end 311 of the control circuit is connected to the power supply). Due to the characteristic of the P-type MOS tube that it is turned off at high level and turned on at low level, the first switch tube Q1 remains in the cut-off state when powered on, thus cutting off the power supply of the control circuit.

[0129] The second switch tube Q2 is an N-type MOS tube, its drain is electrically connected to the gate of the first switch tube Q1, and the source is grounded. The gate of the second switch tube Q2 is communicatively connected to the first control terminal EN9 of the main control chip U1. During the working process, when the user touches the touch sensing device 204, the main control chip U1 wakes up from the low-power mode and obtains the current power information. At the same time, the main control chip U1 sends a control signal (such as a high-level signal) to the switch driving module 314 through the first control terminal EN9. At this time, after the gate of the N-type MOS tube (the second switch tube Q2) receives the control signal, its source and drain are turned on, so that the gate level of the first switch tube Q1 is pulled low.

[0130] When the gate level of the first switching transistor Q1 is pulled low, the P-type MOS transistor conducts, connecting the power supply 3V3 to the input terminal 311 of the control circuit, and the control circuit starts to work, lighting up the display screen 420. After the display screen 420 is lit, the main control chip U1 transmits the power information to the control circuit through the display interface circuit 320, and the display screen 420 displays the current power information according to the received power information.

[0131] This embodiment can control the power state of the display screen 420 more precisely and efficiently. The combination of the first switching transistor Q1 and the second switching transistor Q2 realizes reliable control of the power supply of the display screen 420, ensuring that the power supply can be quickly connected when needed and timely disconnected when not needed, reducing unnecessary power consumption.

[0132] Refer to Figure 4 , in this embodiment, the power detection circuit 100 includes a detection chip 102, and the detection chip 102 is electrically connected to the battery body 410 for detecting the input power and output power of the battery body 410;

[0133] The detection chip 102 is communicatively connected to the main control chip U1 for feeding back the input power and output power of the battery body 410.

[0134] In this embodiment, the power detection circuit 100 includes a chip integrating detection and operation. The detection chip 102 is electrically connected to the battery body 410 for detecting the input and output power of the battery body 410. For example, the detection chip 102 integrates a detection module and an operation module inside, and can simultaneously complete the acquisition and processing of power information.

[0135] Specifically, the detection module is responsible for real-time monitoring of parameters such as the voltage and current of the battery, and transmitting these raw data to the internal operation module. The operation module processes and calculates these data according to a preset algorithm to generate accurate power information. Through this integrated design, the detection chip 102 can quickly and accurately feed back the actual power of the battery.

[0136] The detection chip 102 is communicatively connected to the main control chip U1, and transmits the processed power information to the main control chip U1 through a data interface (such as I 2 C or SPI). The main control chip U1 performs corresponding control and display operations according to the received power information.

[0137] In this embodiment, by adopting a chip integrating detection and operation, the power detection circuit 100 in this embodiment realizes efficient and accurate power monitoring and feedback. Since the detection and operation modules are integrated in the same chip, the complexity of the external circuit is reduced, and the integration and reliability of the system are improved.

[0138] In addition, the application of the integrated detection and operation chip helps to further optimize the battery management system, extend the service life of the battery, and provide a more intelligent and convenient power display solution.

[0139] Continue to refer to Figure 2 , in this embodiment, the touch detection circuit 202 further includes a restart circuit 500, and the restart circuit 500 includes;

[0140] A third switching transistor Q3, the source of the third switching transistor Q3 is connected to the power supply, and the drain of the third switching transistor Q3 is connected to the power supply terminal of the detection chip 102;

[0141] A fourth switching transistor Q4, the base of the fourth switching transistor Q4 is electrically connected to the main control chip U1, the emitter of the fourth switching transistor Q4 is electrically connected to the source of the third switching transistor Q3, and the collector of the fourth switching transistor Q4 is electrically connected to the gate of the third switching transistor Q3 and grounded.

[0142] In this embodiment, the touch detection circuit 202 further includes a restart circuit 500. The restart circuit 500 includes a third switching transistor Q3 and a fourth switching transistor Q4, and is used to perform a power restart operation on the detection chip 102 under specific conditions.

[0143] In this embodiment, the touch detection circuit 202 further includes a restart circuit 500. The restart circuit 500 includes a third switching transistor Q3 and a fourth switching transistor Q4, and is used to perform a power restart operation on the detection chip 102 under specific conditions.

[0144] Among them, the third switching transistor Q3 can be a P-type MOS transistor, its source is connected to the power supply, and its drain is connected to the power supply terminal of the detection chip 102. In the normal state, the third switching transistor Q3 supplies power to the detection chip 102 through its source.

[0145] The fourth switching transistor Q4 can be a PNP triode, its base is electrically connected to the main control chip U1, its emitter is electrically connected to the source of the third switching transistor Q3, and its collector is electrically connected to the gate of the third switching transistor Q3 and grounded. This circuit design forms a restart mechanism, which can perform a power restart on the detection chip 102 under specific circumstances to ensure the stability and reliability of the system.

[0146] During the normal working process, the base of the fourth switching transistor Q4 is connected to the power supply. At this time, since the fourth switching transistor Q4 is a PNP triode, its emitter and collector are in the off state. Since the third switching transistor Q3 is a P-type MOS transistor and its gate is not connected to a high level, the third switching transistor Q3 is in the on state, and the touch detection circuit 202 is normally powered.

[0147] If it is detected that the detection chip 102 is abnormal or the system needs to restart the detection chip 102 to resume normal operation, the main control chip U1 sends a low-level signal to the base of the fourth switching transistor Q4 through its control terminal. When the main control chip U1 sends a low-level signal to the base of the fourth switching transistor Q4, the PNP triode conducts, and the voltage of its emitter is higher than that of its base, causing conduction between its collector and emitter, and then pulling down the gate voltage of the third switching transistor Q3 (P-type MOS transistor) to the ground potential. At this time, the gate voltage of the third switching transistor Q3 is lower than the source voltage, resulting in the turn-off of the third switching transistor Q3 and cutting off the power supply to the detection chip 102.

[0148] When the control signal of the main control chip U1 is removed, the fourth switching transistor Q4 returns to the cut-off state, the gate voltage of the third switching transistor Q3 returns to the source voltage (i.e., the power supply voltage), the third switching transistor Q3 conducts again, and the power supply to the detection chip 102 is restored. The detection chip 102 restarts and resumes normal operation.

[0149] In this embodiment, by adding the restart circuit 500, the battery power display circuit of this embodiment has been significantly improved in terms of system stability and reliability. The restart circuit 500 can quickly restart the power supply of the detection chip 102 when the detection chip 102 is abnormal or the system requires it, ensuring that the system can promptly resume normal operation.

[0150] Refer to Figure 5 , Figure 5 which is a schematic structural diagram of a power supply device in an embodiment of the present invention.

[0151] The present invention further provides a power supply device for supplying power to a photographic device, including a housing 400, a battery body 410, a display screen 420, and the inductive display circuit of the foregoing embodiment. The specific structure of the inductive display circuit refers to the above embodiment. Since this power supply device adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the housing 400 is provided with at least one power interface 400a for electrically connecting an external device;

[0152] The battery body 410 is disposed inside the housing 400;

[0153] The display screen 420 is at least partially exposed outside the housing 400;

[0154] The display driving circuit 300 is electrically connected to the display screen 420, and the touch sensing circuit 200 has a touch sensing device 204 that is at least partially exposed outside the housing 400.

[0155] At least one power interface 400a pointed out in this embodiment can be a USB-A port, which is mainly used for discharging the battery body 410. Of course, in other embodiments, a USB-C port can also be provided for charging or discharging.

[0156] In the power supply device of this embodiment, users can intuitively see the current battery power information, which is convenient for timely understanding of the battery status. This helps users make reasonable power management decisions during use, such as charging in time when the power is low to avoid the inconvenience caused by power exhaustion.

[0157] It should be noted that the photographic equipment referred to in this embodiment can be a camera, a video camera, etc. In these devices, the accurate display of battery power is crucial for ensuring the normal operation and user experience of the devices.

[0158] The power supply device in this embodiment performs excellently in powering external photographic equipment. For example, it can be installed on a video camera in a mounting manner. This power supply device in the mounting manner is especially suitable for long-term photography projects, such as time-lapse photography.

[0159] Specifically, during time-lapse photography, the video camera usually needs to run at the same position for a long time, shooting images for several hours or even several days to record the effect of time passing. The power supply device in this embodiment can be directly mounted on the video camera, and through its high-capacity and stable power output, ensure that the video camera is continuously powered during the entire shooting process, avoiding interruption of shooting due to insufficient power.

[0160] During this period, users can view the current power status at any time through the display screen on the power supply device, and timely understand the power consumption situation. When the power is low, users can choose an appropriate time to replace the power supply or charge, ensuring that the photography project will not be affected by power problems.

[0161] In another usage scenario, for example, when a video camera is recording a video, the monitoring of battery power is particularly important. Through the power display function of the power storage device, users can always master the remaining power of the device, reasonably arrange the charging time, ensure the continuity of video recording, and avoid video interruption or data loss caused by power exhaustion.

[0162] In addition, during audio recording interviews or music production, the monitoring of the power of the sound recording equipment is equally important. The power display function of the power storage device can help users understand the power status of the device in real time, ensure the smooth progress of the recording process, and avoid recording interruption or quality degradation caused by insufficient power.

[0163] In the power supply device of this embodiment, the application of the touch sensing circuit 200 enables the user to operate without using mechanical buttons. By simply touching the touch sensing device 204, the battery power information can be displayed. This not only improves the operation convenience but also reduces the wear and faults that may be caused by mechanical buttons.

[0164] The above are only partial or preferred embodiments of the present utility model. Neither the text nor the drawings can limit the scope of protection of the present utility model. All equivalent structural transformations made by using the content of the specification and drawings of the present utility model under the overall concept of the present utility model, or direct / indirect applications in other related technical fields are included in the scope of protection of the present utility model.

Claims

1. A battery power display circuit, wherein the battery is used to supply power to a photographic device, and is characterized in that Comprising: A power detection circuit, electrically connected to the battery body, for detecting the power information of the battery body; A touch sensing circuit, which is used to sense human touch and generate a digital signal; A main control chip, communicatively connected to the power detection circuit and the touch sensing circuit respectively, for obtaining the power information detected by the power detection circuit when receiving the digital signal of the touch sensing circuit; A display driving circuit, connected to the main control chip and the display screen respectively, for driving the display screen to display the power of the battery body under the control of the main control chip.

2. The battery power display circuit according to claim 1, wherein The main control chip includes a first signal input terminal; The touch sensing circuit includes: A touch detection circuit, for generating an analog signal when detecting human touch; An induction chip, communicatively connected to the touch detection circuit and the first signal input terminal of the main control chip, and the induction chip is used to convert the analog signal into the digital signal and feedback it to the first signal input terminal of the main control chip.

3. The battery power display circuit according to claim 2, wherein, The touch detection circuit includes: A touch sensing device, for sensing human touch signals; A filtering circuit, electrically connected between the touch sensing device and the induction chip, for filtering the touch signal fed back by the touch sensing device.

4. The battery power display circuit according to claim 3, wherein The filtering circuit includes: A first capacitor, one end of the first capacitor is electrically connected to the common terminal of the induction chip and grounded; A first resistor, one end of the first resistor is electrically connected to the other end of the first capacitor and electrically connected to the second signal input terminal of the induction chip, and the other end of the first resistor is electrically connected to the touch sensing device.

5. The battery power display circuit according to any one of claims 1 to 4, characterized in that, The display driving circuit includes: A control circuit, the control end of the control circuit is communicatively connected to the main control chip, the input end of the control circuit is connected to the power supply, the output end of the control circuit is electrically connected to the display screen, and the control circuit is used to control the working state of the display screen according to the control signal of the main control chip; A display interface circuit, communicatively connected to the data transmission terminal of the main control chip, for transmitting the power information obtained by the main control chip to the display screen.

6. The battery power display circuit according to claim 5, wherein The control circuit includes: A switch module, electrically connected between the input end and the output end of the control circuit, for controlling the power off or on of the display screen; A switch driving module, connected to the control end and the switch module of the control circuit, for driving the switch module to work under the control of the main control chip.

7. The battery power display circuit according to claim 6, wherein The switch module includes: A first switching tube, the source electrode of the first switching tube is connected to the input end of the control circuit, and the drain electrode is electrically connected to the output end of the control circuit; The switch driving module includes: A second switching tube, the drain electrode of the second switching tube is electrically connected to the gate electrode of the first switching tube, the gate electrode of the second switching tube is electrically connected to the control end of the control circuit, and the source electrode of the second switching tube is grounded.

8. The battery power display circuit according to claim 1, characterized in that, The power detection circuit includes a detection chip, and the detection chip is electrically connected to the battery body for detecting the input power and output power of the battery body; The detection chip is communicatively connected to the main control chip for feeding back the input power and the output power of the battery body.

9. The battery power display circuit according to claim 2, wherein The touch sensing circuit further includes a restart circuit, and the restart circuit includes: A third switching transistor, the source of the third switching transistor is connected to the power supply, and the drain of the third switching transistor is connected to the power supply terminal of the sensing chip; A fourth switching transistor, the base of the fourth switching transistor is electrically connected to the main control chip, the emitter of the fourth switching transistor is electrically connected to the source of the third switching transistor, and the collector of the fourth switching transistor is electrically connected to the gate of the third switching transistor and grounded.

10. A power supply device for powering a photographic device, characterized in that, Comprising: A housing provided with at least one power interface for electrically connecting an external device; A battery body disposed within the housing; A display screen, at least partially exposed outside the housing; And a battery power display circuit according to any one of claims 1 to 9, wherein the touch sensing circuit has a touch sensing device at least partially exposed outside the housing.

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