CN116600375A

CN116600375A - Electronic device power supply circuit and electronic equipment

Info

Publication number: CN116600375A
Application number: CN202310877442.3A
Authority: CN
Inventors: 曹攀; 汤建波; 俱嘉豪; 张煜晨
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2023-08-15
Anticipated expiration: 2043-07-18
Also published as: CN116600375B

Abstract

The application discloses an electronic device power supply circuit and electronic equipment, and relates to the technical field of circuits. The electronic device power supply circuit comprises a power management unit, an electronic device and a processing unit. The power management unit is connected between the energy storage unit and the electronic device to supply power to the electronic device. The processing unit is used for: the power management unit is controlled to output a first voltage when the electronic device is in an operating state, and is controlled to output a second voltage when the electronic device is not in the operating state. The first voltage is an operating voltage of the electronic device, and the first voltage is greater than the second voltage. Therefore, when the electronic device is not in a working state, the power management unit outputs smaller second voltage to the electronic device, so that power consumption generated by supplying power to the electronic device can be reduced, the standby time of the electronic device is prolonged, and user experience is improved.

Description

Electronic device power supply circuit and electronic equipment

Technical Field

The present application relates to the field of circuit technologies, and in particular, to a power supply circuit for an electronic device and an electronic device.

Background

Electronic devices such as cell phones, tablet computers, etc. typically include an energy storage unit, a power management module, and a plurality of electronic devices. The power management module comprises a plurality of power management units, and each power management unit is connected between the energy storage unit and the electronic device so that the energy storage unit can supply power to the electronic device connected with the energy storage unit through each power management unit.

In the related art, after an electronic device is turned on, the voltage output by any one of the power management units is constant as the working voltage of the electronic device connected to the power management unit. However, the power management unit in the related art generates larger power consumption when supplying power to the electronic device, which reduces the standby time of the electronic device, resulting in poor user experience.

Disclosure of Invention

The application provides an electronic device power supply circuit and electronic equipment, wherein the electronic device power supply circuit can reduce power consumption generated by supplying power to an electronic device, so that the standby time of the electronic equipment is prolonged, and the user experience is improved. The technical scheme is as follows:

in a first aspect, an electronic device power supply circuit is provided. The electronic device power supply circuit is applied to an electronic apparatus having an energy storage unit. The electronic device power supply circuit includes: the device comprises a power management unit, a first electronic device and a processing unit.

The power management unit has an input, an output and a control. The input end of the power management unit is connected with the energy storage unit, and the output end of the power management unit is connected with the power end of the first electronic device, so that the power management unit can receive the electric energy output by the energy storage module and supply power to the first electronic device. The processing unit has a communication terminal and an output terminal. The control end of the power management unit is connected with the output end of the processing unit, so that the processing unit can control the output voltage when the power management unit supplies power to the first electronic device.

The first electronic device is an electronic device operated by power supplied from the power management unit. The first electronic device may be any one of a fingerprint recognition device, a motor, a speaker, a microphone, a touch sensor in the electronic apparatus. The first electronic device also has a communication terminal. The communication terminal of the first electronic device is connected with the communication terminal of the processing unit, so that the first electronic device can communicate with the processing unit.

The processing unit is used for working: when the first electronic device is in a working state, the power management unit is controlled to output a first voltage, and when the first electronic device is not in a working state, the power management unit is controlled to output a second voltage. The first voltage is a working voltage of the first electronic device. That is, when the power terminal of the first electronic device inputs the first voltage, the first electronic device can operate normally. The first voltage is greater than the second voltage.

In the present application, an electronic device power supply circuit includes a power management unit, a first electronic device, and a processing unit. The power management unit is connected between the energy storage unit and the first electronic device to supply power to the first electronic device. The processing unit may be in communication with the first electronic device and control an output voltage of the power management unit. The processing unit is used for: when the first electronic device is in a working state, the power management unit is controlled to output a first voltage, and when the first electronic device is not in a working state, the power management unit is controlled to output a second voltage. The first voltage is an operating voltage of the first electronic device, and the first voltage is greater than the second voltage. Thus, when the first electronic device is in a working state, the power management unit outputs a larger first voltage to the first electronic device so that the first electronic device can work normally; when the first electronic device is not in a working state, the power management unit outputs smaller second voltage to the first electronic device, so that power consumption generated by supplying power to the first electronic device can be reduced, standby time of the electronic device is prolonged, and user experience is improved.

In some embodiments, the power management unit includes a voltage converter and a voltage regulator. The input end of the voltage converter is connected with the energy storage unit, and the output end of the voltage converter is connected with the input end of the voltage stabilizer. The output end of the voltage stabilizer is connected with the power end of the first electronic device. The output end of the processing unit is connected with the control end of the voltage converter to control the output voltage of the voltage converter, thereby controlling the output voltage of the power management unit.

In some embodiments, when the first electronic device is a fingerprint identification device, the power supply terminal of the fingerprint identification device is connected to the output terminal of the power management unit, and the communication terminal of the fingerprint identification device is connected to the communication terminal of the processing unit. The fingerprint identification device is used for: the first communication signal is transmitted to the processing unit when entering the working state, and the second communication signal is transmitted to the processing unit when entering the dormant state. The processing unit is used for: the power management unit is controlled to output a first voltage after receiving the first communication signal, and is controlled to output a second voltage after receiving the second communication signal.

Alternatively, the fingerprint recognition device may include a fingerprint collector and a fingerprint processor. The fingerprint collector is connected with the input of fingerprint processor, and fingerprint processor's power end is connected with the output of power management unit, and fingerprint processor's communication end is connected with processing unit's communication end. The fingerprint processor is used for: if the electric signal output by the fingerprint collector is received under the condition of being in the dormant state, the fingerprint collector enters into the working state, and a first communication signal is transmitted to the processing unit. The fingerprint processor is further configured to: if the electric signal output by the fingerprint collector is received under the condition of working state, the electric signal output by the fingerprint collector is processed to obtain fingerprint information. The fingerprint processor is further configured to: if the electric signal output by the fingerprint collector is not received within the first preset time under the condition of being in the working state, the device enters a dormant state.

Optionally, the processing unit is further configured to: and transmitting a third communication signal to the fingerprint processor when the electronic device enters the fingerprint identification scene, and transmitting a fourth communication signal to the fingerprint processor when the electronic device exits the fingerprint identification scene. The fingerprint processor is used for: if the electric signal output by the fingerprint collector is received under the condition of being in the dormant state, the fingerprint collector enters a working state under the condition that the communication signal transmitted by the latest received processing unit is a third communication signal, and the first communication signal is transmitted to the processing unit. The fingerprint processor is further configured to: if the fourth communication signal is received, the sleep state is entered.

Optionally, the fingerprint identification device is further configured to: and transmitting a first communication signal to the processing unit when power is on, initializing after transmitting the first communication signal, and transmitting a second communication signal to the processing unit after initializing. In this embodiment, the second voltage is greater than zero.

In some embodiments, the electronic device power supply circuit may further include a second electronic device. The operating voltage of the second electronic device is also the first voltage. The output end of the power management unit is connected with the power end of the second electronic device so as to supply power to the second electronic device. The communication end of the second electronic device is connected with the communication end of the processing unit. The processing unit is used for: when at least one of the first electronic device and the second electronic device is in an operating state, the power management unit is controlled to output a first voltage, and when the first electronic device and the second electronic device are not in an operating state, the power management unit is controlled to output a second voltage.

Optionally, the processing unit is configured to: when at least one of the first electronic device and the second electronic device enters a working state, if the output voltage of the power management unit is the second voltage, the output voltage of the power management unit is controlled to be increased by a preset voltage every second preset time period until the output voltage of the power management unit is the first voltage.

In a second aspect, there is also provided an electronic device comprising an energy storage unit and an electronic device power supply circuit as in any of the first aspects.

The technical effects obtained by the second aspect are similar to the technical effects obtained by the corresponding technical means in the first aspect, and are not described in detail herein.

Drawings

Fig. 1 is an external schematic view of a first electronic device according to an embodiment of the present application;

fig. 2 is an external schematic view of a second electronic device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 4 is a power supply circuit diagram of an electronic device in the related art;

fig. 5 is a power supply circuit diagram of a fingerprint recognition device in the related art;

fig. 6 is a diagram showing an output voltage change of a power management unit in the related art;

Fig. 7 is a circuit configuration diagram of a first electronic device power supply circuit according to an embodiment of the present application;

fig. 8 is a circuit configuration diagram of a second electronic device power supply circuit according to an embodiment of the present application;

fig. 9 is a circuit configuration diagram of a power supply circuit of a first fingerprint recognition device according to an embodiment of the present application;

fig. 10 is a circuit configuration diagram of a power supply circuit of a second fingerprint recognition device according to an embodiment of the present application;

FIG. 11 is a graph showing the variation of the output voltage of the first power management unit according to the embodiment of the present application;

FIG. 12 is a graph showing the variation of the output voltage of a second power management unit according to an embodiment of the present application;

fig. 13 is a diagram showing an output voltage variation of a third power management unit according to an embodiment of the present application;

fig. 14 is a graph showing an output voltage change of a fourth power management unit according to an embodiment of the present application;

fig. 15 is a circuit configuration diagram of a power supply circuit of a motor according to an embodiment of the present application;

fig. 16 is a circuit configuration diagram of a third electronic device power supply circuit provided in an embodiment of the present application;

FIG. 17 is a flowchart of the operation of a first electronic device power supply circuit provided by an embodiment of the present application;

FIG. 18 is a flowchart of the operation of a second electronic device power supply circuit provided in an embodiment of the present application;

FIG. 19 is a flowchart of the operation of a third electronic device power supply circuit provided in an embodiment of the present application;

fig. 20 is a circuit configuration diagram of a fourth electronic device power supply circuit provided in an embodiment of the present application;

FIG. 21 is a flowchart of the fourth electronic device power supply circuit provided by an embodiment of the present application;

FIG. 22 is a flowchart of the operation of a fifth electronic device power circuit provided by an embodiment of the present application;

fig. 23 is a flowchart of the operation of the sixth electronic device power supply circuit according to the embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

It should be understood that references to "a plurality" in this disclosure refer to two or more. In the description of the present application, "/" means or, unless otherwise indicated, for example, A/B may represent A or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and function. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

Before explaining the electronic device power supply circuit provided by the embodiment of the application in detail, an application scenario of the electronic device power supply circuit is explained.

The electronic device 10 includes a cell phone, tablet computer, notebook computer, etc. Fig. 1 and 2 are illustrations of the appearance of two different electronic devices 10 provided by embodiments of the present application. The electronic device 10 shown in fig. 1 is a mobile phone, and the electronic device 10 shown in fig. 2 is a tablet computer.

Taking the electronic device 10 as an example of a mobile phone, fig. 3 is a schematic structural diagram of the electronic device 10 according to an embodiment of the present application. As shown in fig. 3, the electronic device 10 may include a processing unit 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging chip 140, a power management module 141, an energy storage unit 142, an electricity meter 143, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, keys 190, a motor 191, an indicator 192, a camera 193, a display 194, a SIM card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope 180B, a barometric sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint recognition device 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

The processing unit 110 may include one or more processing units, such as: the processing unit 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and/or a neural network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors. In some embodiments, the processing unit 110 may be a System On Chip (SOC) in the electronic device 10. In other embodiments, the processing unit 110 may also be a device with processing functions in the electronic device 10 independent of the SOC.

Wherein the controller may be a neural hub and a command center of the electronic device 10. The controller can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution.

A memory may also be provided in the processing unit 110 for storing instructions and data. In some embodiments, the memory in the processing unit 110 is a cache memory. The memory may hold instructions or data that has just been used or recycled by the processing unit 110. If the processing unit 110 needs to reuse the instruction or data, it may be called directly from memory. Repeated accesses are avoided and the latency of the processing unit 110 is reduced, thereby improving the efficiency of the system.

In some embodiments, the processing unit 110 may include one or more interfaces. The interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface, among others.

The wireless communication function of the electronic device 10 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. The structures of the antennas 1 and 2 in fig. 3 are only one example. Each antenna in the electronic device 10 may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution for wireless communication including 2G/3G/4G/5G, etc. applied to the electronic device 10. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 150 may receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit the electromagnetic waves to the modem processor for demodulation. The mobile communication module 150 can amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate. In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the processing unit 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be provided in the same device as at least some of the modules of the processing unit 110.

The wireless communication module 160 may provide solutions for wireless communication including wireless local area networks (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) networks), bluetooth (BT), global navigation satellite systems (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), and the like, as applied to the electronic device 10. The wireless communication module 160 may be one or more devices that integrate at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and sends the processed signals to the processing unit 110. The wireless communication module 160 may also receive a signal to be transmitted from the processing unit 110, frequency modulate and amplify the signal, and convert the signal into electromagnetic waves to radiate the electromagnetic waves through the antenna 2.

In some embodiments, antenna 1 and mobile communication module 150 of electronic device 10 are coupled, and antenna 2 and wireless communication module 160 are coupled, such that electronic device 10 may communicate with a network and other devices via wireless communication techniques. The wireless communication techniques may include a global system for mobile communications (global system for mobile communications, GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC, FM, and/or IR techniques, among others. The GNSS may include a global satellite positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a beidou satellite navigation system (beidou navigation satellite system, BDS), a quasi zenith satellite system (quasi-zenith satellite system, QZSS), and/or a satellite based augmentation system (satellite based augmentation systems, SBAS).

The electronic device 10 implements display functions through a GPU, a display screen 194, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processing unit 110 may include one or more GPUs that execute program instructions to generate or change display information.

The internal memory 121 may be used to store computer-executable program code that includes instructions. The processing unit 110 executes various functional applications of the electronic device 10 and data processing by executing instructions stored in the internal memory 121. The internal memory 121 may include a storage program area and a storage data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the electronic device 10 (e.g., audio data, phonebook, etc.), and so forth. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like.

The SIM card interface 195 is used to connect a SIM card. The SIM card may be inserted into the SIM card interface 195, or removed from the SIM card interface 195 to effect contact and separation with the electronic device 10. The electronic device 10 may support 1 or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface 195 may support Nano SIM cards, micro SIM cards, and the like. The same SIM card interface 195 may be used to insert multiple cards simultaneously. The types of the plurality of cards may be the same or different. The SIM card interface 195 may also be compatible with different types of SIM cards. The SIM card interface 195 may also be compatible with external memory cards. The electronic device 10 interacts with the network through the SIM card to perform functions such as talking and data communication. In some embodiments, the electronic device 10 employs esims, namely: an embedded SIM card. The eSIM card can be embedded in the electronic device 10 and cannot be separated from the electronic device 10.

The charging chip 140 is connected to the energy storage unit 142. When the electronic device 10 is connected to a charger, the electric energy output from the charger needs to be input to the energy storage unit 142 through the charging chip 140. The charging chip 140 is used for adjusting the charging voltage and the charging current input to the energy storage unit 142.

The electricity meter 143 is connected to the energy storage unit 142 and the processing unit 110. When the electricity meter 143 works, the voltage and the current of the energy storage unit 142 can be detected, the electricity of the energy storage unit 142 can be obtained according to the current of the energy storage unit 142, and the voltage and the electricity of the energy storage unit 142 are output to the processing unit 110.

It should be understood that the illustrated construction of the embodiments of the present application does not constitute a particular limitation of the electronic device 10. In other embodiments of the application, the electronic device 10 may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

It will be appreciated that the above illustration of fig. 3 is merely exemplary of when the electronic device 10 is a cell phone. If the electronic device 10 is a tablet computer or other type of device, fewer structures than those shown in fig. 3 may be included in the structure of the electronic device 10, or more structures than those shown in fig. 3 may be included, which is not limited thereto. For example, in contrast to the handset shown in fig. 3, at least the mobile communication module is not included on a tablet computer without mobile communication capabilities.

The related art of the present application is described below.

Fig. 4 is a power supply circuit diagram of an electronic device 101 in the related art. As shown in fig. 4, the electronic apparatus 10 includes an energy storage unit 142, a power management module 141, and a plurality of electronic devices 101. The electronic device 101 here refers to a device of the electronic apparatus 10 that requires input of electric power when operating in addition to the power management module 141 and the processing unit 110. For example, the electronic device 101 may be any one of the sensor modules 180, or any one of the speaker 170A, the receiver 170B, the microphone 170C, the motor 191, and the like. The power management module 141 may include a plurality of power management units 1412. The input of each power management unit 1412 is adapted to be connected to the energy storage unit 142, and the output of each power management unit 1412 is adapted to be connected to one or more electronic devices 101, such that the energy storage unit 142 may supply power to the electronic device 101 to which it is connected via the respective power management unit 1412. When the power management module 141 operates, any two power management units 1412 do not affect each other, that is, the output voltages of any two power management units 1412 may be the same or different. In the related art, after the electronic device 10 is turned on, the voltage output by any one of the power management units 1412 is constant as the operating voltage of the electronic device 101 to which the power management unit 1412 is connected.

Taking the electronic device 101 as the fingerprint recognition device 180H as an example, fig. 5 is a power supply circuit diagram of the fingerprint recognition device 180H in the related art. As shown in fig. 5, the fingerprint recognition device 180H has an operating voltage of 3.3V (volts). In this case, the output voltage variation diagram of the power management unit 1412 connected to the fingerprint recognition device 180H may be as shown in fig. 6. In the embodiment shown in fig. 6, at time T1, the electronic device 10 is powered on, and the power management unit 1412 powers up and supplies power to the fingerprint recognition device 180H. After that, in the case where the electronic apparatus 10 remains turned on, the voltage output from the power management unit 1412 to the fingerprint recognition device 180H is constant at 3.3V.

However, the fingerprint recognition device 180H is composed of a plurality of electrical components. After the electronic device 10 is powered on, the states of the fingerprint recognition device 180H include an operating state and a sleep state. The working state refers to a state that all electrical elements in the fingerprint identification device 180H are electrified and can detect the fingerprint of the user. The operating state may in turn include an idle mode and a detection mode. The idle mode refers to a case where the fingerprint recognition device 180H does not detect a user fingerprint in an operating state. The detection mode refers to the condition that the fingerprint identification device 180H detects the fingerprint of the user in the working state. The sleep state refers to a state in which most elements in the fingerprint recognition device 180H are not energized, the fingerprint of the user cannot be detected, and only the trigger function is retained. Generally, when the fingerprint identification device 180H needs to switch from the detection mode to the sleep state, it will first enter the idle mode from the detection mode and then switch from the idle mode to the sleep state; when the fingerprint identification device 180H needs to switch from the sleep state to the detection mode, it also enters the idle mode from the sleep state, and then switches from the idle mode to the detection mode.

While the fingerprint recognition device 180H is in the inactive sleep state, the power management unit 1412 still outputs 3.3V power to the fingerprint recognition device 180H in the related art generates a large power consumption. Similarly, the power management unit 1412 also generates large power consumption when power is supplied to the electronic devices 101 such as the speaker 170A, the receiver 170B, the microphone 170C, the motor 191, and the touch sensor 180K. This reduces the standby time of the electronic device 10, resulting in a poor user experience.

Therefore, the embodiment of the application provides the electronic device power supply circuit and the electronic equipment, and the electronic device power supply circuit can reduce the power consumption generated by supplying power to the electronic device, so that the standby time of the electronic equipment is prolonged, and the user experience is improved.

The power supply circuit for electronic devices provided by the embodiment of the application is explained in detail below. In the embodiment of the application, the connection between two electrical structures (including an electronic device, an electrical unit and an electrical module) is electrical connection, and the electrical connection refers to that the two electrical structures can transmit an electrical signal through connection. In addition, the electrical connection between the two electrical structures may be directly connected through a wire, or may be indirectly connected through other electrical structures.

Fig. 7 is a circuit configuration diagram of an electronic device power supply circuit 20 according to an embodiment of the present application. As shown in fig. 7, the electronic device power supply circuit 20 is applied to the electronic apparatus 10. The electronic device 10 has an energy storage unit 142. The energy storage unit 142 may include a battery cell and a battery protection plate connected to the battery cell. The battery cell is used for storing electric energy and charging and discharging through the battery protection plate. The electronic device power supply circuit 20 includes a power management unit 1412, a first electronic device 1012, and a processing unit 110.

The power management unit 1412 has an input terminal a, an output terminal b, and a control terminal g. The first electronic device 1012 has a power supply terminal c. An input terminal a of the power management unit 1412 is connected to the energy storage unit 142, and an output terminal b of the power management unit 1412 is connected to a power terminal c of the first electronic device 1012. The power management unit 1412 may receive the electric energy output from the energy storage unit 142 and perform voltage conversion on the electric energy output from the energy storage unit 142, thereby supplying power to the first electronic device 1012. For example, when the electronic device 10 is operated, the voltage output by the energy storage unit 142 to the power management unit 1412 may be 3.5V, 4V or 4.5V, and after the power management unit 1412 receives the electric energy output by the energy storage unit 142, the voltage of 3.3V, 3V or 2.8V may be output to the first electronic device 1012. The control terminal g of the power management unit 1412 is used for inputting a control signal, and the control signal is used for controlling the power management unit 1412 to operate, thereby controlling the output voltage of the power management unit 1412.

The first electronic device 1012 is the electronic device 101 operated by power supplied from the power management unit 1412. The first electronic device 1012 may be any device of the electronic apparatus 10 that requires input of electric power when operating, except the processing unit 110 and the power management unit 1412. For example, the first electronic device 1012 may be the fingerprint recognition device 180H or the touch sensor 180K in the sensor module 180, or may be any one of the devices such as the speaker 170A, the receiver 170B, the microphone 170C, and the motor 191. The first electronic device 1012 also has a communication terminal d, and the communication terminal d of the first electronic device 1012 is an input/output port, and can be used for inputting communication signals and outputting communication signals. It will be appreciated that the communication terminal d of the first electronic device 1012 need not be a single port, and in some embodiments, the communication terminal d of the first electronic device 1012 may be two ports, one of which is used for inputting communication signals and the other of which is used for outputting communication signals.

The processing unit 110 has a communication terminal e and an output terminal f. The communication terminal e of the processing unit 110 is connected to the communication terminal d of the first electronic device 1012, so that transmission of communication signals between the processing unit 110 and the first electronic device 1012 is possible, thereby performing mutual communication. The processing unit 110 may obtain the state of the first electronic device 1012 by communicating with the first electronic device 1012. Here, the states of the first electronic device 1012 include an operation state and a sleep state. The output terminal f of the processing unit 110 is connected to the control terminal g of the power management unit 1412, so that the processing unit 110 can output a control signal to the power management unit 1412 to control the power management unit 1412 to operate.

The operating voltage of the first electronic device 1012 is a first voltage. That is, when the power terminal c of the first electronic device 1012 inputs the first voltage, the first electronic device 1012 can operate normally. Based on this, the processing unit 110 is operative to: the power management unit 1412 is controlled to output a first voltage when the first electronic device 1012 is in an operating state. The second voltage may be greater than or equal to the minimum voltage that the power terminal c of the first electronic device 1012 needs to input when in the sleep state, and the second voltage is less than the first voltage. The processing unit 110 is further configured to, in operation: the power management unit 1412 is controlled to output the second voltage when the first electronic device 1012 is not in the operating state, which is referred to as the sleep state. Thus, when the first electronic device 1012 is in the operating state, the power management unit 1412 outputs a larger first voltage to the first electronic device 1012 so that the first electronic device 1012 can operate normally; when the first electronic device 1012 is not in the working state, the power management unit 1412 outputs a smaller second voltage to the first electronic device 1012, so that dynamic adjustment of the power supply voltage of the electronic device 101 can be realized, and power consumption generated by supplying power to the first electronic device 1012 is reduced, thereby improving standby time of the electronic device 10 and improving user experience.

It should be noted that, in the above embodiment, the energy storage unit 142 is introduced to describe the structure and the operation of the electronic device power supply circuit 20 according to the embodiment of the present application for the sake of understanding. In fact, the power supply circuit 20 for electronic devices provided in the embodiment of the present application does not include the energy storage unit 142. That is, the energy storage unit 142 is present as an environmental element with respect to the electronic device power supply circuit 20 provided in the embodiment of the present application, and should not be construed as limiting the electronic device power supply circuit 20 provided in the embodiment of the present application.

Fig. 8 is a circuit configuration diagram of another electronic device power supply circuit 20 according to an embodiment of the present application. As shown in fig. 8, the power management unit 1412 may include a voltage converter 14122 and a voltage regulator 14124.

The voltage converter 14122 is used for performing voltage conversion on the electric energy output by the energy storage unit 142. The voltage converter 14122 has an input, an output, and a control. The input terminal of the voltage converter 14122 is the input terminal a of the power management unit 1412. The input of the voltage converter 14122 is connected to the energy storage unit 142. The output terminal of the voltage converter 14122 is for outputting the converted voltage. The control terminal of the voltage converter 14122 is the control terminal g of the power management unit 1412. The control terminal of the voltage converter 14122 is connected to the output terminal f of the processing unit 110 for inputting a control signal. Here, the processing unit 110 controls the operation of the voltage converter 14122 by outputting a control signal to control the output voltage of the voltage converter 14122, thereby controlling the output voltage of the power management unit 1412. In some particular embodiments, the voltage converter 14122 can be at least one of a boost conversion (boost) circuit, a buck conversion (buck) circuit.

The voltage regulator 14124 has an input and an output. The input terminal of the voltage stabilizer 14124 is connected to the output terminal of the voltage transformer 14122, so as to receive the output voltage of the voltage transformer 14122, and stabilize the output voltage. The voltage regulator 14124 may make the output voltage of the power management unit 1412 more stable. The output terminal of the voltage regulator 14124 is connected to the power terminal c of the first electronic device 1012 to supply power to the first electronic device 1012. The output terminal of the voltage stabilizer 14124 is the output terminal b of the power management unit. In some particular embodiments, the regulator 14124 may be, for example, a low dropout linear regulator 14124 (low dropout regulator, LDO).

The operation of the electronic device power circuit 20 is explained in detail below from two possible embodiments.

1. In a first possible embodiment, the first electronic device 1012 is an electronic device 101 having a processor to implement processing functions. For example, the first electronic device 1012 may be a fingerprint recognition device 180H.

The operation of the electronic device power supply circuit 20 (including the case a and the case B described below) will be described below taking the first electronic device 1012 as an example of the fingerprint recognition device 180H.

In case a, when the fingerprint recognition device 180H is switched between the operation state and the sleep state, the electronic device power supply circuit 20 operates.

Fig. 9 is a circuit configuration diagram of a power supply circuit of a fingerprint identification device 180H according to an embodiment of the present application. As shown in fig. 9, the power supply terminal c1 of the fingerprint recognition device 180H is connected to the output terminal b of the power management unit 1412 so that the power management unit 1412 can supply power to the fingerprint recognition device 180H. The communication terminal d1 of the fingerprint recognition device 180H is connected to the communication terminal e of the processing unit 110, so that transmission of communication signals between the fingerprint recognition device 180H and the processing unit 110 is possible, thereby performing mutual communication.

In this embodiment, the fingerprint recognition device 180H may be configured to perform step S110: the fingerprint recognition device 180H transmits a first communication signal to the processing unit 110 when entering an operating state. The processing unit 110 is configured to execute step S210: the processing unit 110 controls the power management unit 1412 to output a first voltage after receiving the first communication signal. Thus, when the fingerprint identification device 180H is in the operating state, the processing unit 110 controls the power management unit 1412 to output the first voltage to the fingerprint identification device 180H. The fingerprint recognition device 180H may also be used to perform step S120: the fingerprint recognition device 180H transmits a second communication signal to the processing unit 110 when entering the sleep state. The processing unit 110 may be further configured to perform step S220: the processing unit 110 controls the power management unit 1412 to output the second voltage after receiving the second communication signal. Thus, when the fingerprint identification device 180H is not in the operating state, the processing unit 110 controls the power management unit 1412 to output the second voltage to the fingerprint identification device 180H.

Specifically, as shown in fig. 10, the fingerprint recognition device 180H may include a fingerprint collector 180H2 and a fingerprint processor 180H4. The fingerprint processor 180H4 has an input terminal, a power terminal, and a communication terminal. The fingerprint sensor 180H2 is connected to an input of the fingerprint processor 180H4 such that the fingerprint sensor 180H2 can output an electrical signal to the fingerprint processor 180H4. The power terminal of the fingerprint processor 180H4 is the power terminal c1 of the fingerprint identification device 180H, and the power terminal of the fingerprint processor 180H4 is connected to the output terminal b of the power management unit 1412. The communication end of the fingerprint processor 180H4 is the communication end d1 of the fingerprint identification device 180H, and the communication end of the fingerprint processor 180H4 is connected with the communication end e of the processing unit 110. In the embodiment of the present application, the fingerprint identification device 180H is in an operating state, that is, the fingerprint processor 180H4 is in an operating state; the fingerprint recognition device 180H is in a sleep state, that is, the fingerprint processor 180H4 is in a sleep state.

In some embodiments, the fingerprint identification device 180H may be a capacitive-type fingerprint identification device 180H. In this case, the fingerprint sensor 180H2 may include a plurality of capacitors. When a user performs fingerprint identification, the capacitance of each of the plurality of capacitors will change, and at this time, the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H4, where the electrical signal is the capacitance of each of the capacitors in the fingerprint collector 180H 2. In other embodiments, the fingerprint recognition device 180H may also be an optical-type fingerprint recognition device 180H. In this case, the fingerprint sensor 180H2 may include a plurality of photoelectric converters. When a user performs fingerprint identification, the intensity of the output current of each photoelectric converter in the plurality of photoelectric converters can be changed, and at this time, the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H4, where the electrical signal is the intensity of the output current of each photoelectric converter in the fingerprint collector 180H 2. In other embodiments, the fingerprint identification device 180H may also be an acoustic wave fingerprint identification device 180H, and the like, which will not be described again. It will be appreciated that the electronic device 10 is provided with a fingerprint acquisition area that a user can perform fingerprint recognition by touching. The fingerprint acquisition area may be located within a display area of the display screen 194 of the electronic device 10.

That is, when the user performs fingerprint recognition, the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H 4. Based on this, the fingerprint recognition device 180H may specifically be: if the fingerprint processor 180H4 receives the electrical signal output by the fingerprint sensor 180H2 while in the sleep state, it enters the working state and transmits the first communication signal to the processing unit 110. After the fingerprint processor 180H4 enters the operation state, that is, after the fingerprint identification device 180H enters the operation state, fingerprint identification can be performed. Thus, the fingerprint processor 180H4 is also configured to: if the electric signal output by the fingerprint collector 180H2 is received under the working state, the electric signal output by the fingerprint collector 180H2 is processed to obtain fingerprint information. Thus, fingerprint recognition can be completed.

In this embodiment, the fingerprint processor 180H4 is further operative to: if the fingerprint processor 180H4 does not receive the electrical signal output by the fingerprint sensor 180H2 within the first preset duration under the condition of being in the working state, the sleep state is entered. It will be appreciated that as previously described, the states of the fingerprint recognition device 180H include an operational state and a sleep state, wherein the operational state may in turn include an idle mode and a detection mode. In the case where the fingerprint identification device 180H is in the operating state, that is, the fingerprint processor 180H4 is in the operating state, if the fingerprint processor 180H4 does not receive the electrical signal output by the fingerprint collector 180H2, it indicates that the fingerprint identification device 180H is in the idle mode. Thus, in this embodiment, when the duration in which the fingerprint recognition device 180H is continuously in the idle mode reaches the first preset duration, the fingerprint recognition device 180H enters the sleep state. The first preset duration may be set by those skilled in the art according to requirements. The first preset duration may be, for example, 5 seconds, 10 seconds, 20 seconds, or 30 seconds.

Further, the above-mentioned operation process of the electronic device power supply circuit 20 may also be combined with the operation scenario of the electronic device 10, where the operation scenario of the electronic device 10 includes a fingerprint identification scenario and other scenarios. Other scenes refer to scenes that do not require fingerprint identification, for example, the fingerprint identification scene may be a fingerprint payment scene, a fingerprint unlocking scene, a fingerprint entry scene, and the like. Other scenes may be, for example, game scenes, chat scenes, etc. Here, the processing unit 110 may be further configured to: when the electronic device 10 enters the fingerprint recognition scene, the processing unit 110 transmits a third communication signal to the fingerprint processor 180H 4; and transmitting a fourth communication signal to the fingerprint processor 180H4 when the electronic device 10 exits the fingerprint recognition scenario.

In this case, the fingerprint processor 180H4 is configured to: if the electrical signal output by the fingerprint sensor 180H2 is received while in the sleep state, the operation state is entered when the communication signal transmitted by the processing unit 110 that is newly received is the third communication signal, and the first communication signal is transmitted to the processing unit 110. If the communication signal transmitted by the processing unit 110 that is received by the fingerprint processor 180H4 is the third communication signal, it indicates that the electronic device 10 enters the fingerprint identification scenario. That is, in this embodiment, the fingerprint processor 180H4 enters the operation state from the sleep state after receiving the electrical signal output from the fingerprint sensor 180H2 only after the electronic device 10 enters the fingerprint recognition scene. If the communication signal transmitted by the processing unit 110 that is received by the fingerprint processor 180H4 is not the third communication signal, that is, the electronic device 10 does not enter the fingerprint identification scene, the fingerprint processor 180H4 will not enter the working state after receiving the electrical signal output by the fingerprint collector 180H 2. In this embodiment, the fingerprint processor 180H4 is also configured to: if the fourth communication signal is received, the sleep state is entered.

In case B, when the fingerprint recognition device 180H is powered on, the electronic device power supply circuit 20 operates.

In general, the fingerprint recognition device 180H having a processor to implement a processing function needs to be initialized when power is applied. The purposes of initialization include: (1) Changing the value of a register in the fingerprint identification device 180H so that the value of the register is a preset value; (2) Changing the states of the input port and the output port of the fingerprint identification device 180H; (3) flushing the cache of the fingerprint recognition device 180H. The fingerprint recognition device 180H needs to be initialized when an operating voltage is input to its power supply terminal. Based on this, the fingerprint recognition device 180H may also be configured to perform step S130: the fingerprint recognition device 180H transmits a first communication signal to the processing unit 110 upon power-up, and is initialized after transmitting the first communication signal. Thus, when the fingerprint identification device 180H is powered on, the processing unit 110 controls the power management unit 1412 to output the first voltage to the fingerprint identification device 180H, so as to support the fingerprint identification device 180H to be initialized. The fingerprint recognition device 180H may also be used to perform step S140, transmitting a second communication signal to the processing unit 110 after the initialization is completed. Thus, after the fingerprint identification device 180H is initialized, the processing unit 110 controls the power management unit 1412 to output the second voltage to the fingerprint identification device 180H when the fingerprint identification device is not in the operating state.

It will be appreciated that in this embodiment, to avoid initializing the fingerprint identification device 180H before each operation, the second voltage should be greater than zero. For example, the first voltage may be 3.3V and the second voltage may be 2.8V. That is, after the fingerprint recognition device 180H is powered on, if it is initialized or in an operating state, the power terminal c1 of the fingerprint recognition device 180H inputs a voltage of 3.3V; if the fingerprint recognition device 180H is in a sleep state, a voltage of 2.8V is input to the power terminal c1 of the fingerprint recognition device 180H. In this way, the fingerprint recognition device 180H can be brought into the operation state from the sleep state without re-initializing the operation state when the user performs fingerprint recognition.

The power supply process of the fingerprint identification device 180H will be described below with reference to five working scenarios of the electronic device 10, taking the first voltage of 3.3V, the second voltage of 2.8V, and the first preset duration of 10 seconds as examples.

Scene 1: fig. 11 is a diagram showing an output voltage variation of the power management unit 1412 according to an embodiment of the present application. As shown in fig. 11, at time T1, the electronic device 10 is powered on. When the electronic device 10 is powered on, the fingerprint identification device 180H needs to be initialized. In this case, the fingerprint processor 180H4 in the fingerprint recognition device 180H transmits the first communication signal to the processing unit 110 when powered on. The processing unit 110 receives the first communication signal and controls the power management unit 1412 to output a voltage of 3.3V to the power terminal c1 of the fingerprint recognition device 180H. In this manner, the fingerprint identification device 180H may be initialized by the first voltage. At time T2, the fingerprint recognition device 180H completes initialization, and the fingerprint processor 180H4 in the fingerprint recognition device 180H enters a sleep state and transmits a second communication signal to the processing unit 110. The processing unit 110 receives the second communication signal and then controls the power management unit 1412 to output a voltage of 2.8V to the power terminal c1 of the fingerprint recognition device 180H.

Scene 2: as shown in fig. 12, at time T1, the electronic device 10 is powered on. When the electronic device 10 is powered on, the fingerprint identification device 180H needs to be initialized. In this case, the fingerprint processor 180H4 in the fingerprint recognition device 180H transmits the first communication signal to the processing unit 110 when powered on. The processing unit 110 receives the first communication signal and controls the power management unit 1412 to output a voltage of 3.3V to the power terminal c1 of the fingerprint recognition device 180H. In this manner, the fingerprint recognition device 180H may complete initialization under the first voltage. At time T2, the fingerprint recognition device 180H completes initialization. After the fingerprint identification device 180H completes initialization, if the fingerprint processor 180H4 in the fingerprint identification device 180H does not receive the electrical signal output by the fingerprint collector 180H2 within 10 seconds, it enters a sleep state at time T3 and transmits a second communication signal to the processing unit 110. Time T3 differs from time T2 by 10 seconds. The processing unit 110 receives the second communication signal and then controls the power management unit 1412 to output a voltage of 2.8V to the power terminal c1 of the fingerprint recognition device 180H.

Scene 3: after the scene 1 or the scene 2, the electronic device 10 is turned on and is in the bright screen state, if the electronic device 10 does not enter the fingerprint identification scene, the processing unit 110 will not transmit the third communication signal to the fingerprint processor 180H4 in the fingerprint identification device 180H. In this case, since the fingerprint processor 180H4 does not receive the communication signal transmitted from the processing unit 110 recently, that is, does not receive the third communication signal transmitted from the processing unit 110, when the user touches the fingerprint acquisition area of the electronic device 10, the fingerprint processor 180H4 does not enter the operation state and does not transmit the first communication signal to the processing unit 110 when the fingerprint processor 180H2 outputs an electrical signal to the fingerprint processor 180H 4. That is, at this time, the electronic apparatus 10 is in another scene, the fingerprint recognition device 180H is not operated, and the user can perform operations such as clicking, sliding, etc. on the electronic apparatus 10.

In this scenario, the fingerprint recognition device 180H is always in a sleep state, and the voltage output from the power management unit 1412 to the fingerprint recognition device 180H is kept at 2.8V.

Scene 4: after the scene 1 or the scene 2, the electronic device 10 is turned on and is in the bright screen state, as shown in fig. 13, if the user needs to enter a fingerprint at the time T4, that is, the electronic device 10 enters the fingerprint identification scene, the processing unit 110 transmits a third communication signal to the fingerprint processor 180H4 in the fingerprint identification device 180H. Meanwhile, the processing unit 110 may further control the display screen 194 of the electronic device 10 to display information such as "please touch the fingerprint collection area to perform fingerprint identification", and the like, for prompting the user to touch the fingerprint collection area. At time T5, the user touches the fingerprint collection area of the electronic device 10, and the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H4, at this time, since the communication signal transmitted by the processing unit 110 that is received by the fingerprint processor 180H4 last is the third communication signal, the fingerprint processor 180H4 enters the working state and transmits the first communication signal to the processing unit 110. The processing unit 110 receives the first communication signal and controls the power management unit 1412 to output a voltage of 3.3V to the power terminal c1 of the fingerprint recognition device 180H. Thus, the fingerprint identification device 180H may operate under the action of the first voltage, that is, the fingerprint processor 180H4 may process the electrical signal output by the fingerprint collector 180H2 to obtain fingerprint information, so as to perform fingerprint input. At time T6, the fingerprint entry is completed, i.e. the electronic device 10 exits the fingerprint identification scenario, at which point the processing unit 110 transmits a fourth communication signal to the fingerprint processor 180H4 in the fingerprint identification device 180H. The fingerprint processor 180H4 enters the sleep state after receiving the fourth communication signal, and transmits the second communication signal to the processing unit 110. The processing unit 110 receives the second communication signal and then controls the power management unit 1412 to output a voltage of 2.8V to the power terminal c1 of the fingerprint recognition device 180H.

Scene 5: after the scene 3 or the scene 4, if the user performs the screen locking operation on the electronic device 10, the output voltage change chart of the power management unit 1412 may be as shown in fig. 14, that is: at time T7, the user performs a screen locking operation, and at this time, the electronic device 10 enters a fingerprint identification scene, so that the user can perform fingerprint unlocking on the electronic device 10. At this time, the processing unit 110 transmits a third communication signal to the fingerprint processor 180H4 in the fingerprint recognition device 180H. At time T8, the user touches the fingerprint collection area of the electronic device 10, and the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H4, at this time, since the communication signal transmitted by the processing unit 110 that is received by the fingerprint processor 180H4 last is the third communication signal, the fingerprint processor 180H4 enters the working state and transmits the first communication signal to the processing unit 110. The processing unit 110 receives the first communication signal and controls the power management unit 1412 to output a voltage of 3.3V to the power terminal c1 of the fingerprint recognition device 180H. Thus, the fingerprint identification device 180H may operate under the action of the first voltage, that is, the fingerprint processor 180H4 may process the electrical signal output by the fingerprint collector 180H2 to obtain fingerprint information, so as to unlock the fingerprint. At time T9, the fingerprint unlocking is completed, and the electronic device 10 exits the fingerprint recognition scenario, at which time the processing unit 110 transmits a fourth communication signal to the fingerprint processor 180H4 in the fingerprint recognition device 180H. The fingerprint processor 180H4 enters the sleep state after receiving the fourth communication signal, and transmits the second communication signal to the processing unit 110. The processing unit 110 receives the second communication signal and then controls the power management unit 1412 to output a voltage of 2.8V to the power terminal c1 of the fingerprint recognition device 180H. At this time, since the communication signal transmitted by the processing unit 110 that is newly received by the fingerprint processor 180H4 is not the third communication signal, when the user touches the fingerprint acquisition area of the electronic device 10, the fingerprint processor 180H4 will not enter the operating state and the first communication signal will not be transmitted to the processing unit 110 when the fingerprint processor 180H2 outputs an electrical signal to the fingerprint processor 180H 4. That is, at this time, the electronic apparatus 10 is in another scene, the fingerprint recognition device 180H is not operated, and the user can perform operations such as clicking, sliding, etc. on the electronic apparatus 10.

It will be appreciated that, in some embodiments, to avoid that the sudden increase of the voltage output by the power management unit 1412 to the first electronic device 1012 causes the first electronic device 1012 to be abnormal, the processing unit 110 may be configured to: the processing unit 110 controls the output voltage of the power management unit 1412 to increase by a preset voltage every second preset time period until the output voltage of the power management unit 1412 is the first voltage. The second preset time period here may be, for example, any time period of 1 ms to 3 ms, and the preset voltage may be, for example, any voltage of 0.1V to 0.2V, which may be set empirically by those skilled in the art. In some specific embodiments, when the second voltage is 2.8V and the first voltage is 3.3V, the processing unit 110 may control the output voltage of the power management unit 1412 to increase by 0.1V every 1 millisecond when receiving the first communication signal until the output voltage of the power management unit 1412 is 3.3V.

2. In a second possible embodiment, the first electronic device 1012 is an electronic device 101 without a processor that can be controlled to operate directly by the processing unit 110. For example, the first electronic device 1012 may be a motor 191.

The operation of the electronic device power supply circuit 20 will be described below using the first electronic device 1012 as an example of the motor 191. Fig. 15 is a circuit configuration diagram of a power supply circuit of a motor 191 according to an embodiment of the present application. As shown in fig. 15, the power source terminal c2 of the motor 191 is connected to the output terminal b of the power management unit 1412 so that the power management unit 1412 can supply power to the motor 191. The communication terminal d2 of the motor 191 is connected to the communication terminal e of the processing unit 110 so that the processing unit 110 can transmit a communication signal to the motor 191. The communication signals transmitted by the processing unit 110 to the motor 191 are used to control the operation of the motor 191.

In this embodiment, the processing unit 110 may control the power management unit 1412 to output the first voltage when the motor 191 is controlled to operate (i.e., the motor 191 is in an operating state), and may control the power management unit 1412 to output the second voltage when the motor 191 is not controlled to operate (i.e., the motor 191 is not in an operating state). For convenience of description, a state when the motor 191 is not in the operating state may also be referred to as a sleep state. Also, in this embodiment, when the processing unit 110 controls the output voltage of the power management unit 1412 to be converted from the second voltage to the first voltage, it may be: the processing unit 110 controls the output voltage of the power management unit 1412 to increase by a preset voltage every second preset time period until the output voltage of the power management unit 1412 is the first voltage.

The working process of the electronic device power supply circuit 20 provided in the embodiment of the present application is further extended as follows.

Fig. 16 is a circuit configuration diagram of a power supply circuit 20 for an electronic device according to still another embodiment of the present application. As shown in fig. 16, the electronic device power supply circuit 20 may also include a second electronic device 1014.

The second electronic device 1014 is also the electronic device 101 that is powered by the power management unit 1412 to operate, and is a device that requires input of electric power when any operation other than the processing unit 110, the power management unit 1412, and the first electronic device 1012 is performed in the electronic apparatus 10. For example, in general, the first electronic device 1012 is one of the fingerprint recognition device 180H, the touch sensor 180K, the speaker 170A, the receiver 170B, the microphone 170C, the motor 191, and the like, and the second electronic device 1014 is the other of the fingerprint recognition device 180H, the touch sensor 180K, the speaker 170A, the receiver 170B, the microphone 170C, the motor 191, and the like. The power supply terminal h of the second electronic device 1014 is connected to the output terminal b of the power management unit 1412. The second electronic device 1014 also has a communication terminal i, which is an input/output port of the second electronic device 1014, and can be used for inputting communication signals and outputting communication signals.

It is understood that in the embodiment of the present application, the power management unit 1412 cannot output the first voltage and the second voltage at the same time. That is, when the output terminal b of the power management unit 1412 outputs the first voltage, the voltages input to the power terminal c of the first electronic device 1012 and the power terminal h of the second electronic device 1014 are both the first voltage; when the output terminal b of the power management unit 1412 outputs the second voltage, the voltages input to the power terminal c of the first electronic device 1012 and the power terminal h of the second electronic device 1014 are both the second voltage. The communication terminal e of the processing unit 110 may include a plurality of ports, and the communication terminal d of the first electronic device 1012 and the communication terminal i of the second electronic device 1014 are connected to different ports of the communication terminal e of the processing unit 110, respectively. In this way, the second electronic device 1014 is not affected by the transmission of the communication signal between the processing unit 110 and the first electronic device 1012, and the first electronic device 1012 is not affected by the transmission of the communication signal between the processing unit 110 and the second electronic device 1014. That is, the processing unit 110 may transmit communication signals only with the first electronic device 1012, may transmit communication signals only with the second electronic device 1014, or may transmit communication signals simultaneously with the first electronic device 1012 and the second electronic device 1014, respectively.

The operating voltage of the second electronic device 1014 is also the first voltage. That is, when the power source terminal h of the second electronic device 1014 inputs the first voltage, the second electronic device 1014 can operate normally. Based on this, the processing unit 110 is operative to: the power management unit 1412 is controlled to output a first voltage when at least one of the first electronic device 1012 and the second electronic device 1014 is in an operating state. The processing unit 110 is further configured to, in operation: the power management unit 1412 is controlled to output a second voltage when neither the first electronic device 1012 nor the second electronic device 1014 is in an operating state. As such, when at least one of the first electronic device 1012 and the second electronic device 1014 is in an operating state, the power management unit 1412 outputs a larger first voltage so that the first electronic device 1012 and the second electronic device 1014 can operate normally; when neither the first electronic device 1012 nor the second electronic device 1014 is in the working state, the power management unit 1412 outputs the smaller second voltage, so that the power consumption generated by supplying power to the first electronic device 1012 and the second electronic device 1014 can be reduced, thereby improving the standby time of the electronic apparatus 10 and improving the user experience.

Based on the same concept, the electronic device power supply circuit 20 may further include a third electronic device, a fourth electronic device, and so on, which will not be described again. In this embodiment, the processing unit 110 may also be configured to: when at least one of the first electronic device 1012 and the second electronic device 1014 enters the operation state, if the output voltage of the power management unit 1412 is the second voltage, the output voltage of the power management unit 1412 is controlled to increase by a preset voltage every second preset time period until the output voltage of the power management unit 1412 is the first voltage.

The operation of the electronic device power supply circuit 20 will be explained in detail from four specific embodiments. In the following four specific embodiments, the first voltage is 3.3V, the second voltage is 2.8V, the first preset time period is 10 seconds, the second preset time period is 1 millisecond, and the preset voltage is 0.1V.

The first embodiment.

Fig. 17 is a flowchart of an electronic device power supply circuit 20 according to an embodiment of the present application, where the flowchart illustrates the electronic device power supply circuit 20 when the fingerprint identification device 180H is initialized after the electronic device 10 is turned on, and the flowchart may correspond to the electronic device power supply circuit 20 illustrated in fig. 9 or fig. 10. That is, in this embodiment, the electronic device power supply circuit 20 does not include the second electronic device 1014, and the first electronic device 1012 is the fingerprint recognition device 180H. As shown in fig. 17, the operation of the electronic device power supply circuit 20 includes the following steps S1 to S4.

S1, initializing the fingerprint identification device 180H.

When the electronic device 10 is powered on, the fingerprint identification device 180H needs to be initialized. In this case, the fingerprint processor 180H4 in the fingerprint recognition device 180H transmits the first communication signal to the processing unit 110 when powered on. The processing unit 110 receives the first communication signal and controls the power management unit 1412 to output a voltage of 3.3V to the power terminal c1 of the fingerprint recognition device 180H. In this manner, the fingerprint identification device 180H may be initialized by the first voltage.

S2, judging whether the initialization of the fingerprint identification device 180H is completed.

If the initialization of the fingerprint recognition device 180H is not completed, the initialization of the fingerprint recognition device 180H is continued. If the initialization of the fingerprint recognition device 180H is completed, step S3 is performed.

S3, the fingerprint identification device 180H enters a dormant state.

The fingerprint recognition device 180H invokes the instruction stored in itself to enter the sleep state after the initialization is completed and transmits the second communication signal to the processing unit 110.

S4, reducing the voltage.

The processing unit 110 receives the second communication signal and then controls the power management unit 1412 to output a voltage of 2.8V to the power terminal c1 of the fingerprint recognition device 180H.

A second embodiment.

Fig. 18 is a flowchart of another electronic device power supply circuit 20 according to an embodiment of the present application, where the electronic device power supply circuit 20 is shown when the electronic apparatus 10 performs fingerprint recognition, and the flowchart may correspond to the electronic device power supply circuit 20 shown in fig. 9 or fig. 10. That is, in this embodiment, the electronic device power supply circuit 20 does not include the second electronic device 1014, and the first electronic device 1012 is the fingerprint recognition device 180H. Fingerprint identification herein may include fingerprint entry, fingerprint unlocking, fingerprint payment, and the like. As shown in fig. 18, the operation of the electronic device power supply circuit 20 includes the following steps S1 to S5.

S1, the fingerprint identification device 180H enters an operating state and boosts.

If the user needs to perform fingerprint input, fingerprint unlocking, fingerprint payment, etc., that is, the electronic device 10 enters a fingerprint recognition scene, the processing unit 110 transmits a third communication signal to the fingerprint processor 180H4 in the fingerprint recognition device 180H. Then, when the user touches the fingerprint collection area of the electronic device 10, the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H4, and at this time, since the communication signal transmitted by the processing unit 110 that is received by the fingerprint processor 180H4 last is the third communication signal, the fingerprint processor 180H4 enters the working state and transmits the first communication signal to the processing unit 110. The processing unit 110 receives the first communication signal, and then controls the voltage output by the power management unit 1412 to the power terminal c1 of the fingerprint recognition device 180H to be changed from 2.8V to 3.3V.

S2, judging whether the finger falls down or not.

In step S1, the user touches the fingerprint sensing area of the electronic device 10 to put the fingerprint recognition device 180H into an operating state, i.e. to wake up the fingerprint recognition device 180H. After the fingerprint recognition device 180H enters the operation state, step S2 is performed. It will be appreciated that the fingerprint processor 180H4 may determine whether a finger has fallen by determining whether an electrical signal output by the fingerprint sensor 180H2 has been received. That is, in step S2, if the fingerprint processor 180H4 does not receive the electrical signal output by the fingerprint collector 180H2, it indicates that the finger is not falling, and the determination result in step S2 is no, step S2 is continuously performed, i.e. the finger is continuously waiting for falling; if the fingerprint processor 180H4 receives the electrical signal output by the fingerprint collector 180H2, it indicates that the finger falls, and the determination result in step S2 is yes, step S3 is executed at this time.

S3, fingerprint identification is carried out.

In step S2, the fingerprint sensor 180H2 outputs an electrical signal to the fingerprint processor 180H 4. After the fingerprint processor 180H4 in the working state receives the electrical signal output by the fingerprint collector 180H2, the electrical signal output by the fingerprint collector 180H2 can be processed to obtain fingerprint information. Thus, fingerprint recognition can be completed.

S4, the fingerprint identification device 180H enters a dormant state.

After the fingerprint identification is completed, the electronic device 10 exits the fingerprint identification scenario, at which time the processing unit 110 transmits a fourth communication signal to the fingerprint processor 180H4 in the fingerprint identification device 180H. The fingerprint processor 180H4 enters the sleep state after receiving the fourth communication signal, and transmits the second communication signal to the processing unit 110.

S5, reducing the voltage.

The processing unit 110 receives the second communication signal, and then controls the voltage output by the power management unit 1412 to the power terminal c1 of the fingerprint recognition device 180H to drop from 3.3V to 2.8V. Here, the processing unit 110 may control the output voltage of the power management unit 1412 to decrease by 0.1V every 1 millisecond, until the output voltage of the power management unit 1412 is 2.8V.

A third embodiment.

Fig. 19 is a flowchart of still another electronic device power supply circuit 20 according to an embodiment of the present application, where the flowchart illustrates the electronic device power supply circuit 20 when the electronic apparatus 10 performs fingerprint recognition, and the flowchart may correspond to the electronic device power supply circuit 20 illustrated in fig. 9 or fig. 10. As shown in fig. 19, this embodiment differs from the second specific embodiment in that: step S6 is added. If the judgment result of the step S2 is yes, the step S3 is executed. If the judgment result in the step S2 is no, the step S6 is executed.

S6, judging whether the time length waiting for the falling of the finger reaches 10 seconds.

Specifically, after the fingerprint identification device 180H enters the operation state, if in step S2, the fingerprint processor 180H4 does not receive the electrical signal output by the fingerprint collector 180H2, i.e. the finger does not fall, at this time, the timing is started. If the fingerprint processor 180H4 receives the electrical signal output by the fingerprint collector 180H2 within 10 seconds, it indicates that the duration of waiting for the finger to fall does not reach 10 seconds, that is, the determination result in step S6 is no, and step S3 may be executed at this time. If the fingerprint processor 180H4 does not receive the electrical signal output by the fingerprint collector 180H2 within 10 seconds, it indicates that the duration of waiting for the finger to fall reaches 10 seconds, that is, the determination result in step S6 is yes, and step S4 may be executed at this time.

A fourth embodiment.

Fig. 20 is a circuit configuration diagram of a power supply circuit 20 for an electronic device according to still another embodiment of the present application. Fig. 21 to 23 are flowcharts showing operations of three different electronic device power supply circuits 20 according to the embodiment of the present application, which can be applied to the electronic device power supply circuit 20 shown in fig. 20. In this embodiment, the electronic device power supply circuit 20 includes a first electronic device 1012 and a second electronic device 1014. One of the first electronic device 1012 and the second electronic device 1014 is a fingerprint recognition device 180H, and the other is a motor 191.

As shown in fig. 21, during the operation of the electronic device power supply circuit 20, the operation of at least one of the fingerprint recognition device 180H and the motor 191 into an operation state includes the following steps S1 to S6.

S1, at least one of the fingerprint identification device 180H and the motor 191 enters an operating state.

The fingerprint recognition device 180H enters an operating state: if the user needs to perform fingerprint input, fingerprint unlocking, fingerprint payment, etc., that is, the electronic device 10 enters a fingerprint recognition scene, the processing unit 110 transmits a third communication signal to the fingerprint processor 180H4 in the fingerprint recognition device 180H. Then, when the user touches the fingerprint collection area of the electronic device 10, the fingerprint collector 180H2 outputs an electrical signal to the fingerprint processor 180H4, and at this time, since the communication signal transmitted by the processing unit 110 that is received by the fingerprint processor 180H4 last is the third communication signal, the fingerprint processor 180H4 enters the working state. When the fingerprint recognition device 180H enters an operating state, a first communication signal is transmitted to the processing unit 110.

The motor 191 enters the operating state means that: the processing unit 110 transmits a communication signal to the motor 191 for controlling the operation of the motor 191.

When at least one of the fingerprint recognition device 180H and the motor 191 is put into operation, the processing unit 110 needs to control the power management unit 1412 to output the first voltage.

S2, it is determined whether or not the power management unit 1412 outputs a voltage of 2.8V.

The processing unit 110 determines whether the power management unit 1412 outputs the second voltage. Since the power management unit 1412 is controlled by the processing unit 110, the processing unit 110 can directly obtain the output voltage of the power management unit 1412. If the judgment result of the step S2 is yes, the step S3 is executed, otherwise, the step S5 is executed.

S3, waiting for 1 millisecond.

S4, the output voltage of the power management unit 1412 is increased by 0.1V.

S5, it is determined whether the power management unit 1412 outputs a voltage of 3.3V.

If the judgment result of the step S5 is yes, executing a step S6; if the judgment result in the step S5 is no, the step S3 is executed again.

S6, the output voltage of the power management unit 1412 is kept unchanged.

That is, when at least one of the fingerprint recognition device 180H and the motor 191 is put into an operation state, that is, when the processing unit 110 needs to control the power management unit 1412 to output a voltage of 3.3V, if the power management unit 1412 outputs a voltage of 2.8V before that, the processing unit 110 controls the output voltage of the power management unit 1412 to increase by 0.1V every 1 millisecond, until the power management unit 1412 outputs a voltage of 3.3V. After that, the output voltage of the power management unit 1412 is kept constant at 3.3V.

As shown in fig. 22, in the operation of the electronic device power supply circuit 20, the operation of the fingerprint recognition device 180H from the operation state to the sleep state includes the following steps S7 to S10.

S7, the fingerprint identification device 180H enters a dormant state.

When the electronic device 10 exits the fingerprint recognition scenario, the processing unit 110 transmits a fourth communication signal to the fingerprint processor 180H4 in the fingerprint recognition device 180H, and the fingerprint processor 180H4 enters the sleep state after receiving the fourth communication signal, i.e., the fingerprint recognition device 180H enters the sleep state. Or, when the fingerprint processor 180H4 is in the operating state, if the electrical signal output by the fingerprint sensor 180H2 is not received within 10 seconds, the fingerprint processor 180H4 enters the sleep state, i.e. the fingerprint identification device 180H enters the sleep state. When the fingerprint recognition device 180H enters the sleep state, a second communication signal is transmitted to the processing unit 110.

S8, judging whether the motor 191 is in a non-working state.

After receiving the second communication signal, the processing unit 110 determines whether the motor 191 is in a non-operating state. Since the motor 191 is directly controlled by the processing unit 110, the processing unit 110 can directly obtain whether the motor 191 is in the inactive state. If the motor 191 is in the inactive state, step S9 is performed; if the motor 191 is in an operating state, step S10 is performed.

S9, reducing the voltage.

That is, when neither the fingerprint recognition device 180H nor the motor 191 is in an operating state, the processing unit 110 controls the output voltage of the power management unit 1412 to drop from 3.3V to 2.8V.

S10, the voltage of the power management unit 1412 is kept unchanged.

I.e., the motor 191 is in an operating state, the processing unit 110 controls the output voltage of the power management unit 1412 to be 3.3V.

As shown in fig. 23, during the operation of the electronic device power supply circuit 20, the operation of the motor 191 from the operation state to the sleep state includes the following steps S11 to S14.

S11, the motor 191 enters a sleep state.

The processing unit 110 no longer controls the motor 191 to operate, or controls the motor 191 to stop operating, the motor 191 enters a sleep state.

S12, judging whether the fingerprint identification device 180H is in a dormant state.

After the motor 191 enters the sleep state, the processing unit 110 determines whether the fingerprint recognition device 180H is in the sleep state. The processing unit 110 may determine whether the fingerprint recognition device 180H is in the sleep state according to whether the communication signal transmitted by the fingerprint recognition device 180H that is newly received is the second communication signal. If the communication signal transmitted by the fingerprint recognition device 180H that is received by the processing unit 110 is the second communication signal, it indicates that the fingerprint recognition device 180H is in the sleep state, and step S13 is performed. If the communication signal transmitted by the fingerprint identification device 180H that is received by the processing unit 110 is the first communication signal, it indicates that the fingerprint identification device 180H is in an operating state, and step S14 is performed.

S13, reducing the voltage.

S14, the voltage of the power management unit 1412 is kept unchanged.

I.e., the fingerprint recognition device 180H is in an operating state, the processing unit 110 controls the output voltage of the power management unit 1412 to be 3.3V.

The embodiment of the present application also provides an electronic device 10, including an energy storage unit 142 and the electronic device power supply circuit 20 according to any of the above embodiments. Thus, when the first electronic device 1012 is in the operating state, the power management unit 1412 outputs a larger first voltage to the first electronic device 1012 so that the first electronic device 1012 can operate normally; when the first electronic device 1012 is not in the working state, the power management unit 1412 outputs a smaller second voltage to the first electronic device 1012, so that dynamic adjustment of the power supply voltage of the electronic device 101 can be realized, and power consumption generated by supplying power to the first electronic device 1012 is reduced, thereby improving standby time of the electronic device 10 and improving user experience.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. An electronic device power supply circuit for use in an electronic apparatus having an energy storage unit, the electronic device power supply circuit comprising: the electronic device comprises a power management unit, a first electronic device and a processing unit;

the input end of the power management unit is connected with the energy storage unit, and the output end of the power management unit is connected with the power end of the first electronic device so as to supply power to the first electronic device; the communication end of the first electronic device is connected with the communication end of the processing unit;

the output end of the processing unit is connected with the control end of the power management unit, and the processing unit is used for: when the first electronic device is in a working state, the power management unit is controlled to output a first voltage, and when the first electronic device is not in the working state, the power management unit is controlled to output a second voltage, wherein the first voltage is the working voltage of the first electronic device and is larger than the second voltage.

2. The electronic device power supply circuit of claim 1, wherein the first electronic device comprises any one of a fingerprint recognition device, a motor, a speaker, a microphone, a touch sensor.

3. The electronic device power supply circuit according to claim 2, wherein a power supply terminal of the fingerprint identification device is connected to an output terminal of the power management unit, and a communication terminal of the fingerprint identification device is connected to a communication terminal of the processing unit;

the fingerprint identification device is used for: transmitting a first communication signal to the processing unit when entering a working state, and transmitting a second communication signal to the processing unit when entering a dormant state;

the processing unit is used for: and after receiving the first communication signal, controlling the power management unit to output the first voltage, and after receiving the second communication signal, controlling the power management unit to output the second voltage.

4. The electronic device power supply circuit of claim 3, wherein the fingerprint identification device comprises a fingerprint collector and a fingerprint processor;

the fingerprint collector is connected with the input end of the fingerprint processor, the power end of the fingerprint processor is connected with the output end of the power management unit, and the communication end of the fingerprint processor is connected with the communication end of the processing unit;

the fingerprint processor is used for: if the electric signal output by the fingerprint collector is received under the condition of being in the dormant state, entering the working state, and transmitting the first communication signal to the processing unit;

The fingerprint processor is further configured to: and if the electric signal output by the fingerprint collector is received under the working state, processing the electric signal output by the fingerprint collector to obtain fingerprint information.

5. The electronic device power supply circuit of claim 4, wherein the fingerprint processor is further configured to: if the electric signal output by the fingerprint collector is not received within a first preset time under the condition of being in the working state, entering the dormant state, and transmitting the second communication signal to the processing unit.

6. The electronic device power supply circuit of claim 4, wherein the processing unit is further to: transmitting a third communication signal to the fingerprint processor when the electronic device enters a fingerprint identification scene, and transmitting a fourth communication signal to the fingerprint processor when the electronic device exits the fingerprint identification scene;

the fingerprint processor is used for: if the electric signal output by the fingerprint collector is received under the condition of being in the dormant state, entering the working state under the condition that the communication signal transmitted by the processing unit which is received last is the third communication signal, and transmitting the first communication signal to the processing unit;

The fingerprint processor is further configured to: and if the fourth communication signal is received, entering the dormant state.

7. The electronic device power supply circuit of claim 3, wherein the fingerprint recognition device is further configured to: and transmitting the first communication signal to the processing unit when power is on, initializing after transmitting the first communication signal, and transmitting the second communication signal to the processing unit after initializing.

8. The electronic device power supply circuit of claim 7 wherein the second voltage is greater than zero.

9. The electronic device power supply circuit according to any one of claims 1 to 8, further comprising a second electronic device whose operating voltage is the first voltage;

the output end of the power management unit is connected with the power end of the second electronic device so as to supply power to the second electronic device; the communication end of the second electronic device is connected with the communication end of the processing unit;

the processing unit is used for: and when at least one of the first electronic device and the second electronic device is in the working state, controlling the power management unit to output the first voltage, and when neither the first electronic device nor the second electronic device is in the working state, controlling the power management unit to output the second voltage.

10. The electronic device power supply circuit of claim 9, wherein the processing unit is to: when at least one of the first electronic device and the second electronic device enters the working state, if the output voltage of the power management unit is the second voltage, the output voltage of the power management unit is controlled to be increased by a preset voltage every second preset time period until the output voltage of the power management unit is the first voltage.

11. The electronic device power supply circuit of claim 1, wherein the power management unit comprises a voltage converter and a voltage regulator;

the input end of the voltage converter is connected with the energy storage unit, the output end of the voltage converter is connected with the input end of the voltage stabilizer, and the output end of the voltage stabilizer is connected with the power end of the first electronic device;

the output end of the processing unit is connected with the control end of the voltage converter so as to control the output voltage of the voltage converter.

12. An electronic device comprising an energy storage unit and an electronic device power supply circuit as claimed in any one of claims 1 to 11.