CN219225556U - Capacitance control circuit and terminal equipment - Google Patents
Capacitance control circuit and terminal equipment Download PDFInfo
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- CN219225556U CN219225556U CN202320282287.6U CN202320282287U CN219225556U CN 219225556 U CN219225556 U CN 219225556U CN 202320282287 U CN202320282287 U CN 202320282287U CN 219225556 U CN219225556 U CN 219225556U
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Abstract
The application discloses a capacitance control circuit and terminal equipment, relates to the field of computers. The control circuit comprises a capacitor power supply branch and a system power supply branch; the capacitor power supply branch is connected in parallel with the system power supply branch and is respectively connected with the power supply in series; the capacitor power supply branch circuit comprises a current limiting chip, a power supply switch, a first load and a target capacitor; the current limiting chip, the power supply switch and the first load are sequentially connected in series; the output end of the current limiting chip and the input end of the power supply switch are connected with the target capacitor; the target capacitor accords with the physical discharge condition, and the capacitance of the target capacitor is larger than the specified capacitance threshold; the system power supply branch circuit comprises a system voltage converter and a second load which are sequentially connected in series; the first load is connected with the second load, and the second load is used for controlling the operation of the first load, so that the circuit can reduce the peak power consumption of the palm brushing module, solve the problem of insufficient power supply of equipment when the module is integrated, and improve the integration and popularization of the module.
Description
Technical Field
The present disclosure relates to the field of computers, and in particular, to a capacitance control circuit and a terminal device.
Background
The palm brushing module is a camera for identifying personal identity through palm print or palm vein images and a processing operation system, and is used for carrying out identity identification.
In the related art, in order to obtain a clear image which is not deformed and not blurred in the motion process, a Global exposure (Global Camera) Camera Sensor (Camera Sensor) with short exposure time is selected, and a large number of photons are required for the Camera Sensor to complete exposure in a very short time, so that a high-current drive with synchronous frequency and pulse width of a light supplementing lamp and Sensor exposure is required, and the instantaneous peak power consumption of the module is very high due to the high current.
Therefore, the peak power consumption of the module is high, so that a problem of insufficient maximum power supply capability is encountered when a plurality of devices are integrated with the palm brushing module, and the module cannot be used or is unstable due to insufficient power supply, and under the condition, the integration and popularization of the module are severely limited.
Disclosure of Invention
The embodiment of the application provides a capacitance control circuit and terminal equipment. The technical scheme is as follows:
according to one aspect of an embodiment of the present application, there is provided a capacitive control circuit, the control circuit including a capacitive power supply branch and a system power supply branch;
the capacitor power supply branch is connected in parallel with the system power supply branch and is respectively connected with a power supply in series;
the capacitor power supply branch circuit comprises a current limiting chip, a power supply switch, a first load and a target capacitor; the current limiting chip, the power supply switch and the first load are sequentially connected in series; the output end of the current limiting chip and the input end of the power supply switch are connected with the target capacitor; the target capacitor accords with a physical discharge condition, and the capacitance of the target capacitor is larger than a specified capacitance threshold;
the system power supply branch circuit comprises a system voltage converter and a second load which are sequentially connected in series; the first load is connected with the second load, and the second load is used for controlling the operation of the first load.
In an alternative embodiment, the input end of the current limiting chip is connected with the positive electrode end of the power supply; the current limiting chip meets the backflow prevention condition;
the input end of the system voltage converter is connected with the positive end of the power supply;
the first load and the second load are connected with the negative electrode terminal of the power supply.
In an alternative embodiment, the output end of the current limiting chip and the input end of the power supply switch are connected with the first end of the target capacitor;
and the second end of the target capacitor is connected with the negative electrode end of the power supply.
In an alternative embodiment, the current limiting chip prevents current from flowing from the output of the current limiting chip to the input of the current limiting chip when the power supply is de-energized.
In an alternative embodiment, the target capacitance undergoes a physical reaction during charging and discharging, and electrical energy is stored and released based on the physical reaction.
In an alternative embodiment, the power switch is turned on when the power supply is powered by the power supply source;
the power supply switch is turned off when the power supply is powered off.
In an alternative embodiment, the power supply comprises a target power supply, a protection branch and a power supply voltage converter which are sequentially connected in series; the protection branch circuit is used for converting the power supply voltage output by the target power supply into a power supply voltage conforming to a specified voltage range; the power supply voltage converter is used for converting the power supply voltage into a power supply voltage with a specified voltage threshold.
In an alternative embodiment, the input end of the protection branch is connected with the positive electrode end of the target power supply;
the input end of the power supply voltage converter is connected with the output end of the protection branch;
the input end of the current limiting chip is connected with the output end of the power supply voltage converter;
the input end of the system voltage converter is connected with the output end of the power supply voltage converter.
In another aspect, a terminal device is provided, where the terminal device includes a capacitance control circuit provided in an embodiment of the present application.
In an alternative embodiment, the terminal device is implemented as a palm brushing device;
the first load comprises a light supplementing lamp panel; the light supplementing lamp panel is used for supplementing light in the palm brushing process;
the second load includes a processor chip.
The beneficial effects that technical scheme that this application embodiment provided include at least:
the power supply is connected with the parallel capacitor power supply branch and the system power supply branch in series respectively, so that the power supply can supply power to the first load and the second load simultaneously, a target capacitor is connected between the output end of the current limiting chip in the capacitor power supply branch and the input end of the power supply switch, under the condition that the first load needs large current driving, the peak power consumption at the moment of electrifying is restrained under the condition that the current of the system power supply branch is not pumped, and the problem of insufficient power supply to the first load is solved while the normal operation of the second load is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of an implementation environment provided by an exemplary embodiment of the present application;
FIG. 2 is a schematic diagram of a capacitance control circuit provided in an exemplary embodiment of the present application;
fig. 3 is a schematic diagram of a charge-discharge principle of a lithium battery according to an exemplary embodiment of the present application;
fig. 4 is a schematic diagram of the working principle of the supercapacitor according to an exemplary embodiment of the present application;
FIG. 5 is a schematic diagram of a capacitance control circuit provided in another exemplary embodiment of the present application;
FIG. 6 is a schematic diagram of a power supply provided in an exemplary embodiment of the present application;
fig. 7 is a schematic diagram of a target capacitive connection provided in an exemplary embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
It should be understood that, although the terms first, second, etc. may be used in this disclosure to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first parameter may also be referred to as a second parameter, and similarly, a second parameter may also be referred to as a first parameter, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
Before describing embodiments of the present application, in order to facilitate understanding of the present solution, terms appearing in the present solution are explained below.
The palm brushing module is a camera for identifying personal identity through palm print or palm vein images and a processing operation system, and is used for carrying out identity identification. In the related art, in order to obtain a clear image which is not deformed and not blurred in the motion process, a global exposure camera sensor with short exposure time is selected, and a large number of photons are needed for the camera sensor to complete exposure in a short time, so that a light supplementing lamp is driven by high current with frequency and pulse width synchronous with the exposure of the sensor, and the instant peak power consumption of the module is very high due to the high current. Therefore, the peak power consumption of the module is high, so that a problem of insufficient maximum power supply capability is encountered when a plurality of devices are integrated with the palm brushing module, and the module cannot be used or is unstable due to insufficient power supply, and under the condition, the integration and popularization of the module are severely limited.
According to the capacitor control circuit provided by the embodiment of the application, the power supply is connected in series with the parallel capacitor power supply branch and the system power supply branch, so that the power supply can supply power to the first load and the second load simultaneously, the output end of the current limiting chip in the capacitor power supply branch and the input end of the power supply switch are connected with the target capacitor, under the condition that the first load needs large current driving, the peak power consumption at the moment of electrifying is restrained under the condition that the current of the system power supply branch is not pumped, and therefore the problem of insufficient power supply to the first load is solved while the normal operation of the second load is ensured, the brush palm module using the capacitor control circuit can avoid the problem of insufficient power supply capacity at the moment, prevent the module from being incapable of being used or unstable, and improve the integration and popularization of the module.
First, an implementation environment of the present application will be described. Referring to fig. 1, a schematic diagram of an implementation environment provided in an exemplary embodiment of the present application is shown, where the implementation environment includes: and a terminal 100.
The terminal 100 is provided with a target module, which is an operating system for implementing a specified function, and the target module is provided with a capacitance control circuit 110 for suppressing peak power consumption of the target module. The capacitor control circuit 110 comprises a capacitor control circuit 10 and a system power supply branch 20 which are connected in parallel, the capacitor control circuit 10 comprises a current limiting chip 11, a power supply switch 12, a first load 13 and a target capacitor 14, the current limiting chip 11, the power supply switch 12 and the first load 13 are sequentially connected in series, the output end of the current limiting chip 11 and the input end of the power supply switch 12 are connected with the target capacitor 14, wherein the target capacitor 14 meets the physical discharging condition, the capacitance of the target capacitor 14 is larger than a specified capacitor threshold value, the current limiting chip 11 is used for controlling the current value flowing into the target capacitor 14, the power supply switch 12 is used for controlling the current flowing into the first load 13 to be started or stopped, and the first load 14 is a functional load which needs large current driving in the target module. The system power supply branch 20 comprises a system voltage converter 21 and a second load 22 which are sequentially connected in series, wherein the system voltage converter 21 is used for controlling a voltage value output to the second load 22, the second load 22 is connected with the first load 13, and the second load 22 is a control load in the target module and is used for controlling the operation of the first load 13. The parallel capacitive supply branch 10 and the system supply branch 20 are connected in series with a supply source 30, the supply source 30 being arranged to supply power to the first load 13 and the second load 22. Alternatively, the power supply 30 is a power supply disposed inside the terminal 100, or the power supply 30 is a power supply externally accessed to the terminal 100.
In some embodiments, the target module is implemented as a palm module, and is a camera and a processing operating system deployed in the terminal 100 for identifying a person's identity through palm print or palm vein images, and is used for performing identity identification, optionally, the first load 13 is implemented as a light supplementing light board in the palm module, and is used for assisting the palm module to perform global exposure, and the second load 22 is implemented as a CPU (Central Processing Unit ) chip in the palm module, and is used for executing control functions and controlling execution of each function of the palm module.
In some embodiments, the implementation environment further includes a terminal 200 that establishes a connection with the terminal 100. Alternatively, the terminal 200 is implemented as a host computer of the terminal 100, and is used for instructing the terminal 100 to perform a specified function using the target module, at this time, the power supply 30 may be implemented as a power supply deployed in the terminal 200, or the power supply 30 is a power supply externally connected to the terminal 200, and the terminal 200 supplies power to the first load 13 and the second load 22 in the terminal 100 using the power supply 30 through a connection relationship with the terminal 100.
Alternatively, the above terminal may be implemented as a server.
The above terminal is optional, and the terminal may be a desktop computer, a laptop portable computer, a mobile phone, a tablet computer, an electronic book reader, an MP3 (Moving Picture Experts Group Audio Layer III, dynamic image expert compression standard audio layer 3) player, an MP4 (Moving Picture Experts Group Audio Layer IV, dynamic image expert compression standard audio layer 4) playing, an intelligent television, an intelligent vehicle-mounted terminal device, and the like, which is not limited in this embodiment of the present application.
It should be noted that the server may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server that provides cloud services, cloud security, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, a content distribution network (Content Delivery Network, CDN), and basic cloud computing services such as big data and an artificial intelligence platform.
Cloud Technology (Cloud Technology) refers to a hosting Technology that unifies serial resources such as hardware, software, network and the like in a wide area network or a local area network to realize calculation, storage, processing and sharing of data.
In some embodiments, the servers described above may also be implemented as nodes in a blockchain system.
It should be noted that, information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, presented data, etc.), and signals referred to in this application are all authorized by the user or are fully authorized by the parties, and the collection, use, and processing of relevant data is required to comply with relevant laws and regulations and standards of relevant countries and regions. For example, biological information such as palmprint, palmvein images, and the like, and identity information, and the like, are referred to in this application as being acquired with sufficient authorization.
Referring to fig. 2, fig. 2 is a schematic diagram of a capacitive control circuit according to an exemplary embodiment of the present application, and as shown in fig. 2, the control circuit includes a capacitive power supply branch 10 and a system power supply branch 20.
The capacitive power supply branch 10 is connected in parallel with the system power supply branch 20 and is connected in series with the power supply 30, respectively.
The capacitor power supply branch 10 comprises a current limiting chip 11, a power supply switch 12, a first load 13 and a target capacitor 14; the current limiting chip 11, the power supply switch 12 and the first load 13 are sequentially connected in series; the output of the current limiting chip 11 and the input of the power supply switch 12 are connected to a target capacitor 14. The current limiting chip 11 is used for controlling the amount of current flowing into the target capacitor 14, the power supply switch 12 is used for controlling the current flowing into the first load 13 to be turned on or off, and the target capacitor 14 is used for rapidly charging and discharging energy to inhibit instantaneous peak power consumption.
In some embodiments, the first load 13 is implemented as a functional load for performing a specified function, the first load 13 requiring a current greater than a specified current threshold for driving. The first load 13 is an exemplary light-compensating light board in the palm module, and is used for assisting the palm module to complete global exposure operation when acquiring an image for identity recognition, that is, providing a large number of photons for light compensation, where the light-compensating light board needs to be driven by a current greater than a specified current threshold.
The target capacitance 14 meets the physical discharge condition and the capacitance of the target capacitance 14 is greater than the specified capacitance threshold. Alternatively, the physical discharge condition is implemented such that the target capacitance 14 undergoes a physical reaction during the charging and discharging processes, and electric energy is stored and discharged based on the physical reaction.
In the related art, the lithium battery and the protection circuit thereof are used, and the electrochemical reaction is generated during the charging and discharging process of the lithium battery, and the electric energy is stored and released based on the electrochemical reaction, which will lead to a short service life of the lithium battery and poor performance stability, resulting in a high cost of the functional module device using the lithium battery and the protection circuit thereof, and for example, please refer to fig. 3, fig. 3 is a schematic diagram of the charging and discharging principle of the lithium battery according to an exemplary embodiment of the present application, and as shown in fig. 3, the lithium battery 310 uses C (graphite) as the negative electrode 311 and LiCoO2 (lithium cobaltate) as the positive electrode 312. During charging, lithium ions are separated from the positive electrode 312, are driven by an electrochemical potential gradient to migrate to the negative electrode 311 through electrolyte, and the equal amount of electrons are required to flow from the positive electrode 312 to the negative electrode 311 under an external circuit in charge balance, so that the lithium ions of the electrons obtained after reaching the negative electrode 311 are then inserted into a lattice of a negative electrode material; the discharge proceeds in the opposite process, i.e., lithium ions leave the negative lattice, intercalate into the positive electrode 312 and reform LiCoO2. The electrochemical reaction during the charge and discharge of the lithium battery 310 includes the following reaction formula:
(1) Positive electrode reaction: liCoO 2 →Li 1-x CoO 2 +xe - +xLi +
(2) Negative electrode reaction: xLi + +xe - +nC→Li x C n
(3) Cell reaction: liCoO 2 +nC→Li 1-x CoO 2 +Li x C n
Wherein x and n are preset electric quantity parameters, e - Is lithium ion.
In some embodiments, the target capacitor 14 is implemented as a super capacitor, the super capacitor meets the physical discharge condition, and the capacitance is larger than that of a specified common capacitor, the super capacitor is a power supply between a traditional capacitor and a battery, and stores electric energy by means of electric double layer and redox pseudocapacitance charge, but no chemical reaction occurs in the energy storage process, and the energy storage process is reversible and has long service life; in addition, the capacitance of the super capacitor is larger than that of a common capacitor such as a ceramic capacitor, so that the super capacitor can suppress peak power consumption to a greater extent, i.e. the suppression effect is better than that of the ceramic capacitor. Referring to fig. 4, fig. 4 is a schematic diagram illustrating the working principle of the super capacitor according to an exemplary embodiment of the present application, as shown in fig. 4, in the charging process of the super capacitor 410, electrons are transferred from the positive electrode 411 to the negative electrode 412 through an external power source, so that the positive electrode 411 and the negative electrode 412 are respectively charged with positive electricity and negative electricity, and meanwhile, positive and negative ions in the electrolyte solution body are separated and move to the electrode surface opposite to the charge layer on the electrode surface, so as to form an electric double layer; when the supercapacitor 420 discharges, electrons flow from the cathode 421 to the anode 422 through the load, and positive and negative ions are released from the electrode surface and return to the electrolyte solution body, while the electric double layer disappears. Therefore, the supercapacitor stores charges by utilizing the electric double layer of the interface between the electrode and the electrolyte, and the charging and discharging process of the supercapacitor is always a physical process, and does not generate electrochemical reaction.
The system power supply branch 20 comprises a system voltage converter 21 and a second load 22 which are sequentially connected in series; the first load 13 and the second load 22 are connected. Wherein the second load 22 is used for controlling the operation of the first load 13, and the system voltage converter 21 is used for controlling the voltage value output to the second load 22.
In some embodiments, the second load 22 is implemented as a control load for controlling the first load 13 to perform a specified function. The second load 22 is, for example, a CPU chip in the palm module, and is configured to perform a control function, for example, to instruct the light-compensating light panel to perform light compensation when the palm module needs to perform global exposure.
In some embodiments, the system voltage converter 22 is configured to convert a supply voltage within a preset range to a supply voltage having a voltage value of a specified voltage threshold. The system voltage converter 22 is illustratively a DC-DC (Direct current-Direct current converter) converter that converts a supply voltage within a preset range to a supply voltage having a voltage value of a specified voltage threshold, such as converting a voltage of 5-12V to a voltage of 5V, and outputting the voltage to the second load 22.
In some embodiments, the power supply switch 12 in the above-mentioned capacitance control circuit is turned on when the power supply 30 supplies power, turned off when the power supply 30 fails, so as to prevent the target capacitance from supplying power to the first load when the module is powered down, so that the electric energy is reversely fed to the second load through the first load, and the state and timing sequence of the second load are disordered when the module is powered up again, resulting in abnormal function of the module.
Optionally, the implementation manner of the power switch 12 that is turned on when the power supply 30 supplies power and turned off when the power supply 30 is powered off includes at least one of the following manners:
first kindThe power switch is turned on or off by receiving the indication information sent by the second load 22.
Wherein the indication information is sent by the second load 22 based on the received current state, such as sending an indication information indicating that the power switch 12 is on when the power supply current is received, and sending an indication information indicating that the power switch 12 is off when the power supply current stops flowing into the second load 22.
Second kind The power switch 12 may also be turned on or off by receiving an enable signal sent by the power supply 30.
Wherein the enabling signal is sent by the power supply 30 based on the power supply state, such as sending an enabling signal indicating that the power supply switch 12 is turned on when the power supply 30 starts to supply power, and sending an enabling signal indicating that the power supply switch 12 is turned off when the power supply 30 stops supplying power.
Illustratively, the power switch 12 is a P-MOS (Positive Channel Metal Oxide Semiconductor ) switch capable of receiving an enable signal of the power supply 30, and the power switch 12 is turned on when the enable signal indicates that the power supply state of the power supply 30 is power, i.e., is turned on when the power supply 30 is powered, and is turned off when the enable signal indicates that the power supply state of the power supply 30 is power-off, i.e., is turned off when the power supply 30 is powered, depending on the power supply state indicated by the enable signal.
It should be noted that the implementation manner of the power switch 12 that is turned on when the power supply 30 supplies power and turned off when the power supply 30 is powered off is merely an exemplary example, which is not limited in the present application.
The capacitive control circuit is configured to supply power to the first load 13 and the second load 22 simultaneously by connecting the capacitive power supply branch 10 and the system power supply branch 20 in parallel with the power supply 30 in series.
In the brush palm module, the first load 13 is a light supplementing lamp board, the second load 22 is a CPU chip, the target capacitor 14 is a super capacitor, and since a certain time is required for charging the super capacitor, if the capacitor power supply branch 10 and the system power supply branch 20 are connected in series, that is, the super capacitor is fully charged and then the CPU chip is started, the starting time of the brush palm module will be affected, so that the parallel capacitor power supply branch 10 and the system power supply branch 20 are connected in series with the power supply 30, the power supply 30 can supply power to the capacitor power supply branch 10 and the system power supply branch 20 simultaneously, that is, the super capacitor and the CPU chip are started simultaneously, and the starting time of the brush palm module is reduced.
In some embodiments, the input terminal of the current limiting chip 11 in the above circuit is connected to the positive terminal of the power supply 30; the output end of the current limiting chip 11 is connected with the input end of the power supply switch 12. The current limiting chip is used for converting the power supply current provided by the power supply into a current conforming to a specified current value. Wherein, the current limiting chip accords with the anti-backflow condition. In some embodiments, the anti-reverse flow condition is implemented to prevent current from flowing from the output end of the current limiting chip to the input end of the current limiting chip when the current limiting chip is powered off, i.e., to prevent electric quantity from flowing back to the second load through the current limiting chip. The current limiting chip is a current limiting chip adopting a good power enable signal such as a pgood_en signal, wherein the pgood_en signal can instantly sense the on and off of external power supply, namely, the pgood_en signal is enabled (enabled) when the power supply is powered, the pgood_en signal is disabled (disabled) when the power supply is powered off, and the current limiting chip prevents current from flowing from the output end of the current limiting chip to the input end of the current limiting chip when the pgood_en signal is disabled, so that the current limiting chip can normally supply power and prevent reverse filling.
Referring to fig. 5, fig. 5 is a schematic diagram of a capacitance control circuit according to another exemplary embodiment of the present application, and as shown in fig. 5, the capacitance control circuit further includes the following connection relationships:
the input end of the current limiting chip 11 is connected with the positive end of the power supply 30; an input end of the system voltage converter 21 is connected with the positive end of the power supply 30; the first load 13 and said second load 22 are connected to the negative terminal of the power supply 30.
The output end of the current limiting chip 11 and the input end of the power supply switch 12 are connected with the first end of the target capacitor 14; a second terminal of the target capacitor 14 is connected to a negative terminal of the power supply 30.
In some embodiments, the foregoing capacitive control circuit is disposed in a terminal device, where the disposition of the power supply includes two cases:
first, the power supply and the capacitance control circuit are disposed in the same terminal device.
Optionally, the power supply may be disposed inside the terminal device, or may be an external power supply connected to the terminal device, for example, the power supply is a battery device in the terminal device, and the terminal device controls the battery device to directly supply power to the capacitance control circuit, or the power supply is a fixed power supply or a mobile power supply connected to the terminal device, and the terminal device or a controller of the power supply controls the power supply to supply power to the capacitance control circuit.
Second, the power supply and the capacitance control circuit are respectively disposed in two terminal devices with connection relation.
The capacitor control circuit is arranged in terminal equipment serving as a lower computer, the power supply is arranged in the terminal equipment serving as an upper computer, the upper computer is used for supplying power to the lower computer and indicating the lower computer to operate, and the lower computer is used for executing specified functions.
Optionally, the power supply may be disposed inside the upper computer, or may be an external power supply connected to the upper computer, for example, the power supply is a battery device in the upper computer, the upper computer controls the battery device to supply power to the lower computer, so as to supply power to a capacitance control circuit in the lower computer, or the power supply is a fixed power supply or a mobile power supply connected to the upper computer, and the upper computer or a controller of the power supply controls the power supply to supply power to the lower computer, so as to supply power to the capacitance control circuit in the lower computer.
It should be noted that the above-mentioned power supply deployment is merely an exemplary example, and the present application is not limited thereto.
In summary, the capacitive control circuit provided by the embodiment of the application is respectively connected in series with the parallel capacitive power supply branch and the system power supply branch through the power supply, so that the power supply can supply power to the first load and the second load at the same time, the output end of the current limiting chip in the capacitive power supply branch and the input end of the power supply switch are connected with the target capacitor, under the condition that the first load needs large current driving, the peak power consumption at the moment of electrifying is restrained under the condition that the current of the system power supply branch is not pumped, and therefore the problem of insufficient power supply to the first load is solved while the normal operation of the second load is ensured, the palm brushing module using the capacitive control circuit can avoid the problem of insufficient power supply at the moment, prevent the module from being incapable of being used or unstable, and improve the integration and popularization of the module.
According to the circuit provided by the embodiment of the application, the target capacitor which is subjected to physical reaction in the charging process and the discharging process and does not subjected to electrochemical reaction is adopted, so that the service life of the target capacitor is prolonged, and the service life of equipment is prolonged.
The circuit that this application embodiment provided through adopting the current limiting chip that accords with the condition of preventing flowing backward for the current limiting chip prevents to flow backward when can normally supplying power, thereby ensures that the module can normally power down at quick switch-on and switch-off in-process, prevents that the disorder of going up the electric time sequence from appearing leading to the module unstable, has improved the stability of module.
According to the circuit provided by the embodiment of the application, the power supply switch which can be turned on when the power supply is powered off is adopted, and the power supply switch is turned off when the power supply is powered off, so that the target capacitor still supplies power to the first load when the module is powered off, the electric energy is reversely fed to the second load through the first load, the state and the time sequence of the second load are disordered when the module is powered on again, the function of the module is abnormal, and the stability of the module is improved.
Referring to fig. 6, fig. 6 is a schematic diagram of a power supply provided in an exemplary embodiment of the present application, and as shown in fig. 6, a power supply 30 connected in series with a capacitance control circuit in the embodiment of the present application includes a target power supply 31, a protection branch 32, and a power supply voltage converter 33 connected in series in this order.
The protection branch 32 is configured to convert a power supply voltage output by the target power supply 31 into a power supply voltage that conforms to a specified voltage range; the power supply voltage converter 33 is configured to convert a power supply voltage into a power supply voltage of a specified voltage threshold.
In some embodiments, the input of the protection branch 32 is connected to the positive terminal of the target power supply 31; the input end of the power supply voltage converter 33 is connected with the output end of the protection branch 32; the input end of the current limiting chip 11 is connected with the output end of the power supply voltage converter 33; an input of the system voltage converter 21 is connected to an output of the supply voltage converter 33.
In some embodiments, the protection branch 32 is an OVP & OCP (Over Voltage Protection & Over Current Protection, over-voltage protection circuit and over-current protection circuit) for converting the supply voltage output by the target power supply 31 into a supply voltage that meets a specified voltage range and ensuring that the supply current output by the target power supply 31 does not exceed a specified current threshold. The power supply voltage converter 33 is a DC-DC converter, and converts a power supply voltage conforming to a specified voltage range into a power supply voltage having a voltage value of a specified voltage threshold value, and outputs the power supply voltage to the capacitor power supply branch 10 and the system power supply branch 20. Illustratively, the OVP & OCP converts the supply voltage to a supply voltage of 5-12V and the DC-DC converts the supply voltage of 5-12V to a supply voltage of 5V.
In some embodiments, the power supply 30 including the target power supply 31, the protection branch 32 and the power supply voltage converter 33 may be disposed as a whole in the same terminal, or may be disposed in two terminals with connection relationships, where the power supply is externally connected to the content of the same terminal. Illustratively, the power supply 30 is disposed as a whole inside the terminal where the palm module is located, or is a power supply externally connected to the terminal where the palm module is located; the target power supply 31 in the power supply 30 is disposed inside a terminal of an upper computer serving as a terminal of the palm brushing module, the protection branch 32, the power supply voltage converter 33 and the capacitance protection circuit are disposed in the terminal of the palm brushing module together, and a connection relationship is established between the two terminals.
It is noted that when the protection branch 32 or the supply voltage converter 33 in the power supply 30 is disposed in series with the capacitance control circuit at the same terminal, the protection branch 32 or the supply voltage converter 33 may be regarded as a part of the capacitance control circuit, but before the target capacitance 14 is connected to the parallel capacitance supply circuit 10 and the system supply branch 20, that is, the target capacitance 14 may not be connected between the output terminal of the supply voltage converter 33 and the input terminal of the capacitance control circuit, or the target capacitance 14 may be connected between the output terminal of the protection branch 32 and the input terminal of the supply voltage converter 33, or the target capacitance 14 may be connected between the input terminal of the target power supply 31 and the output terminal of the protection branch 32. For example, referring to fig. 7, fig. 7 is a schematic diagram of the connection of the target capacitor according to an exemplary embodiment of the present application, as shown in fig. 7, when the super capacitor 710 as the target capacitor is connected to the first position 701, the second position 702, or the third position 703, due to the fast charging characteristic of the super capacitor 710, the super capacitor 710 will instantaneously draw a current exceeding the specified current threshold at the moment when the target power source starts to supply power, so that the load in the capacitor power supply circuit cannot be started normally.
In summary, according to the circuit provided by the embodiment of the application, the power supply source including the target power supply, the protection branch and the power supply voltage converter which are sequentially connected in series supplies power to the capacitance control circuit, so that the power supply voltage and the power supply current are ensured to meet the input requirement of the capacitance control circuit.
Optionally, the capacitive control circuit provided in the embodiments of the present application includes, but is not limited to, a brushhead scenario, where there is a need to suppress instantaneous peak power consumption, and a scenario where there is a need to control a load to control a functional load to perform a specified function, where the functional load needs current driving exceeding a specified current threshold, and is prone to generate higher instantaneous peak power consumption, and exemplary application scenarios of the capacitive control circuit provided in the embodiments of the present application include the following:
first, a light-supplementing scene in which light supplementing is performed based on a control load instruction light-supplementing load.
In some embodiments, there is a need for light filling with a large amount of photons, such as a palm brushing scene, a light filling scene in a dim environment, a light filling scene with a strong light need, and the like, where a light filling load needs to be driven by a large current to emit a large amount of photons, so that a high instantaneous peak power consumption is generated due to the large current at the moment of power supply, and the instantaneous peak power consumption can be suppressed by switching in a capacitance control circuit in a scene device.
In a virtual shooting scene, a control device corresponding to a light supplementing device indicates the light supplementing device on a shooting scene to supplement light, under the condition that the environment of the shooting scene is darker, the light supplementing device needs a large amount of photons to supplement light, the light supplementing device needs to be driven by a large current to emit a large amount of photons, so that the instant peak power consumption generated by the large current is high at the moment of power supply, the light supplementing device is used as a first load through being connected into a capacitance control circuit, the control device is used as a second load, the power supply is respectively connected in series with a parallel capacitor power supply branch and a system power supply branch through a power supply, so that the power supply can supply power to the light supplementing device and the control device at the same time, under the condition that the light supplementing device needs the large current to be driven, the problem of insufficient power supply to the light supplementing device is solved while ensuring the normal operation of the control device through the power storage capacity of the target capacitor.
Second, a switch control scenario.
In some embodiments, the control switch may issue a control instruction to the functional load based on a user operation or a preset instruction, etc., to control the functional load to start or stop executing the specified function. When the control switch indicates the functional load to start executing the specified function, a larger current is easily generated at the beginning moment, so that the instant peak power consumption is larger.
The electronic screen switch is used as the control switch to control the air conditioner to start or stop running, the air conditioner is used as a first load, the electronic screen switch is used as a second load, and is connected to the capacitor control circuit, the power supply is connected in series with the parallel capacitor power supply branch and the system power supply branch respectively, so that the power supply can supply power to the air conditioner and the electronic screen switch at the same time, a target capacitor is connected between the output end of the current limiting chip in the capacitor power supply branch and the input end of the power supply switch, and under the condition that the air conditioner needs large current driving, the peak power consumption at the moment of electrifying is restrained under the condition that the current of the power supply branch of the system is not drawn, so that the problem of insufficient power supply to the air conditioner is solved while the normal running of the electronic control switch is ensured.
It should be noted that the above application scenario is merely an exemplary example, and the application is not limited thereto.
In some embodiments, in terminal equipment, the capacitor control circuit provided by the embodiment of the application is included, when the terminal equipment works, the power supply source supplies power to the first load and the second load, so that the second load is started and performs a control function, the first load is instructed to perform a specified function, the power supply source is connected with the capacitor power supply branch and the system power supply branch in series, so that the power supply source can supply power to the first load and the second load at the same time, a target capacitor is connected between the output end of the current limiting chip in the capacitor power supply branch and the input end of the power supply switch, under the condition that the first load needs large current for driving, peak power consumption at the moment of power supply is restrained under the condition that the current of the system power supply branch is not regulated, and therefore the problem of insufficient power supply to the first load is solved while the second load is guaranteed to normally operate.
The terminal device is illustratively realized as a palm-brushing device, the palm-brushing device recognizes personal identities through palm prints or palm vein images and is used for performing identity recognition, a first load in the capacitance control circuit is realized as a light supplementing lamp plate and is used for supplementing light in the palm-brushing process, and a second load is realized as a processor chip and is used for indicating the light supplementing lamp plate to supplement light when the palm-brushing device has light supplementing requirements.
It should be noted that the terminal device may be any device with a built-in capacitance control circuit, such as a mobile phone, a notebook computer, and a tablet computer, which is not limited in this application.
It should be understood that references herein to "a plurality" are to two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
It should be noted that the various embodiments in the present application may be freely combined to form new embodiments, which are all within the scope of the present application.
The foregoing description of the preferred embodiments is merely illustrative of the present application and is not intended to limit the utility model to the particular embodiments shown, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A capacitive control circuit, characterized in that it comprises a capacitive supply branch (10) and a system supply branch (20);
the capacitor power supply branch circuit (10) is connected with the system power supply branch circuit (20) in parallel and is respectively connected with a power supply source (30) in series;
the capacitor power supply branch circuit (10) comprises a current limiting chip (11), a power supply switch (12), a first load (13) and a target capacitor (14); the current limiting chip (11), the power supply switch (12) and the first load (13) are sequentially connected in series; the output end of the current limiting chip (11) and the input end of the power supply switch (12) are connected with the target capacitor (14); the target capacitor (14) meets a physical discharge condition, and the capacitance of the target capacitor (14) is larger than a specified capacitance threshold;
the system power supply branch circuit (20) comprises a system voltage converter (21) and a second load (22) which are sequentially connected in series; the first load (13) and the second load (22) are connected, and the second load (22) is used for controlling the operation of the first load (13).
2. The circuit of claim 1, wherein the circuit comprises a plurality of capacitors,
the input end of the current limiting chip (11) is connected with the positive end of the power supply (30); the current limiting chip (11) accords with the backflow prevention condition;
the input end of the system voltage converter (21) is connected with the positive end of the power supply (30);
the first load (13) and the second load (22) are connected with the negative terminal of the power supply (30).
3. The circuit of claim 1, wherein the circuit comprises a plurality of capacitors,
the output end of the current limiting chip (11) and the input end of the power supply switch (12) are connected with the first end of the target capacitor (14);
the second end of the target capacitor (14) is connected with the negative end of the power supply (30).
4. The circuit of claim 2, wherein the anti-reverse flow condition comprises:
the current limiting chip (11) prevents current from flowing out from the output end of the current limiting chip (11) to the input end of the current limiting chip (11) when the power supply (30) is powered off.
5. The circuit of any of claims 1 to 4, wherein the physical discharge conditions comprise:
the target capacitance (14) undergoes a physical reaction during charging and discharging, and electrical energy is stored and released based on the physical reaction.
6. A circuit as claimed in any one of claims 1 to 4, characterized in that,
the power supply switch (12) is turned on when the power supply source (30) supplies power;
the power switch (12) is turned off when the power supply (30) is powered off.
7. A circuit as claimed in any one of claims 1 to 4, characterized in that,
the power supply (30) comprises a target power supply (31), a protection branch (32) and a power supply voltage converter (33) which are sequentially connected in series; the protection branch circuit (32) is used for converting the power supply voltage output by the target power supply (31) into a power supply voltage conforming to a specified voltage range; the power supply voltage converter (33) is configured to convert the power supply voltage into a power supply voltage of a specified voltage threshold.
8. The circuit of claim 7, wherein the circuit further comprises a logic circuit,
the input end of the protection branch (32) is connected with the positive electrode end of the target power supply (31);
the input end of the power supply voltage converter (33) is connected with the output end of the protection branch circuit (32);
the input end of the current limiting chip (11) is connected with the output end of the power supply voltage converter (33);
an input of the system voltage converter (21) is connected to an output of the supply voltage converter (33).
9. A terminal device, characterized in that the terminal device comprises a capacitance control circuit according to any of claims 1 to 8.
10. The terminal device according to claim 9, characterized in that the terminal device is implemented as a palm brushing device;
the first load (13) comprises a light supplementing lamp panel; the light supplementing lamp panel is used for supplementing light in the palm brushing process;
the second load (22) includes a processor chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320282287.6U CN219225556U (en) | 2023-02-06 | 2023-02-06 | Capacitance control circuit and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320282287.6U CN219225556U (en) | 2023-02-06 | 2023-02-06 | Capacitance control circuit and terminal equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219225556U true CN219225556U (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320282287.6U Active CN219225556U (en) | 2023-02-06 | 2023-02-06 | Capacitance control circuit and terminal equipment |
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| Country | Link |
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| CN (1) | CN219225556U (en) |
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2023
- 2023-02-06 CN CN202320282287.6U patent/CN219225556U/en active Active
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