CN113708512A - Electronic device and control method - Google Patents
Electronic device and control method Download PDFInfo
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- CN113708512A CN113708512A CN202111095322.5A CN202111095322A CN113708512A CN 113708512 A CN113708512 A CN 113708512A CN 202111095322 A CN202111095322 A CN 202111095322A CN 113708512 A CN113708512 A CN 113708512A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
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Abstract
The application provides electronic equipment and a control method, and belongs to the technical field of electronics. Electronic equipment includes microcontroller, wireless charging circuit, antenna module and matching circuit, wherein: the matching circuit comprises a wireless charging resonant capacitor and an envelope detection circuit; the wireless charging circuit comprises a micro control unit, a demodulation circuit and an H-bridge driving circuit; the H-bridge driving circuit comprises a first half-bridge driving circuit and a second half-bridge driving circuit, wherein the first ends of the first half-bridge driving circuit and the second half-bridge driving circuit are electrically connected with a power supply end, the second ends of the first half-bridge driving circuit and the second half-bridge driving circuit are grounded, and the first half-bridge driving circuit is electrically connected with the second half-bridge driving circuit through an antenna module and a wireless charging resonant capacitor in sequence; the micro-control unit is electrically connected with the micro-controller, the demodulation circuit, the first half-bridge driving circuit and the second half-bridge driving circuit respectively; the envelope detection circuit is respectively electrically connected with the demodulation circuit and a first point, and the first point is a common point between the wireless charging resonant capacitor and the antenna module.
Description
Technical Field
The embodiment of the application relates to the technical field of electronics, in particular to electronic equipment and a control method.
Background
The 125K low-Frequency Radio Frequency Identification (RFID) technology is a near field communication Identification technology with the carrier Frequency of 125K-135 Khz, and has low cost and quick Identification, thereby having a great amount of application in the access control; the wireless charging technology is a wireless energy transmission technology based on carrier frequency of 110K-190K Hz, and is accompanied with a communication technology for realizing correct energy transmission.
In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: the layout area of the RFID circuit is large, however, along with the requirement of a user on the carrying convenience of the electronic device, the size of the existing electronic device is smaller and smaller, and the space is limited. Therefore, the existing electronic equipment is difficult to integrate the RFID card reading function.
Disclosure of Invention
The embodiment of the application provides electronic equipment and a control method, and the problem that the electronic equipment is difficult to integrate an RFID card reading function can be solved.
To solve the above problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides an electronic device, which includes a microcontroller, a wireless charging circuit, an antenna module, and a matching circuit, where the matching circuit includes a wireless charging resonant capacitor and an envelope detection circuit; the wireless charging circuit comprises a micro control unit, a demodulation circuit and an H-bridge driving circuit; wherein:
the H-bridge driving circuit comprises a first half-bridge driving circuit and a second half-bridge driving circuit, wherein the first ends of the first half-bridge driving circuit and the second half-bridge driving circuit are electrically connected with a power supply end, the second ends of the first half-bridge driving circuit and the second half-bridge driving circuit are grounded, and the first half-bridge driving circuit is electrically connected with the second half-bridge driving circuit through the antenna module and the wireless charging resonant capacitor in sequence; the micro control unit is respectively electrically connected with the microcontroller, the demodulation circuit, the first half-bridge driving circuit and the second half-bridge driving circuit, and the H-bridge driving circuit is used for driving the antenna module to work in a wireless charging emission mode or an RFID card reading mode;
the envelope detection circuit is respectively electrically connected with the demodulation circuit and a first point, and the first point is a common point between the wireless charging resonant capacitor and the antenna module.
In a second aspect, an embodiment of the present application further provides a control method, which is applied to the electronic device according to the first aspect, where the method includes:
determining a first working mode of the electronic equipment, wherein the first working mode is a wireless charging transmission mode or an RFID card reading mode;
and controlling the working state of the electronic equipment according to the first working mode.
In the embodiment of the application, the RFID card reading function can be integrated on the electronic equipment supporting the wireless charging function by only adding a small number of elements in a mode of sharing part of hardware, so that the functions of the electronic equipment can be enriched under the condition that the size of the electronic equipment is hardly influenced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is one of structural diagrams of an electronic device provided in an embodiment of the present application;
fig. 2 is a second block diagram of an electronic device according to an embodiment of the present disclosure;
fig. 3 is a third block diagram of an electronic device according to an embodiment of the present application;
fig. 4 is a fourth structural diagram of an electronic device according to an embodiment of the present application;
FIG. 5 is a flow chart of a control method provided in an embodiment of the present application;
fig. 6 is a second flowchart of a control method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The electronic device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through some embodiments and application scenarios thereof.
In the embodiment of the present application, as shown in fig. 1, the electronic device may include a microcontroller 10, a wireless charging circuit 20, an antenna module 30, and a matching circuit 40.
The matching circuit 40 may include, but is not limited to, a wireless charging resonant capacitor 41 and an envelope detection circuit 42. In practical applications, the number of the wireless charging resonant capacitor 41 may be one or more, and may be determined according to practical requirements, which is not limited in this embodiment of the application.
The wireless charging circuit 20 may include a micro control unit 21, a demodulation circuit 22, and an H-bridge driving circuit 23.
Further, the H-bridge driving circuit 23 may include a first half-bridge driving circuit 231 and a second half-bridge driving circuit 232, wherein first ends of the first half-bridge driving circuit 231 and the second half-bridge driving circuit 232 are electrically connected to a power supply terminal (VCC), second ends of the first half-bridge driving circuit 231 and the second half-bridge driving circuit 232 are electrically connected to ground, and the first half-bridge driving circuit 231 is electrically connected to the second half-bridge driving circuit 232 through the antenna module 30 and the wireless charging resonant capacitor 41.
The micro-control unit 21 is electrically connected 232 with the microcontroller 10, the demodulation circuit 22, the first half-bridge drive circuit 231 and the second half-bridge drive circuit, respectively.
The envelope detection circuit 42 is electrically connected to the demodulation circuit 22 and a first point (denoted by a in the drawing) which is a common point between the wireless charging resonant capacitor 41 and the antenna module 30.
In a specific implementation, the wireless charging Circuit 20 may be an Integrated Circuit (IC), in which case the wireless charging Circuit 20 may be referred to as a wireless charging IC. Of course, in other implementation manners, the wireless charging circuit 20 may not be integrated, which may be determined according to actual situations, and the embodiment of the present application does not limit this.
The H-bridge driving circuit 23 is used for driving the antenna module 30 to operate in a wireless charging transmission mode or an RFID card reading mode. In a specific implementation, the antenna module 30 may include at least one coil, and the H-bridge driving circuit 23 may be configured to drive part or all of the coils in the antenna module to oscillate so as to implement reverse wireless charging or RFID card reading, and therefore, the H-bridge driving circuit may also be referred to as a coil driving circuit or an H-bridge coil driving circuit. In one implementation, the H-bridge driving circuit 23 may oscillate through a half-bridge driving circuit driving coil, and in this case, the H-bridge driving circuit 23 may be considered to be in a half-bridge driving mode. In another implementation, the H-bridge driving circuit 23 can realize coil driving by two half-bridge driving circuits, in which case the H-bridge driving circuit 23 can be considered to be in an H-bridge driving mode.
The envelope detection circuit 42 may be used for carrier filtering and baseband signal preservation. The demodulation circuit 22 may be used for demodulation of the baseband signal to obtain the charging power expected by the charge-receiving device or the card number of the RFID card. The envelope detection circuit 42 and the demodulation circuit 22 may be configured to: determining the transmitting power of the antenna module 30, wherein the transmitting power is determined based on the charging power expected by the charging receiving equipment; the card number of the RFID card is determined. It should be noted that, in the embodiment of the present application, the RFID card may be a physical RFID card, and may also be an analog RFID card.
The microcontroller 10 may be configured to implement overall control of the electronic device, store the identified card number, and transmit the card number through a wireless communication manner or a Universal Serial Bus (USB) connection manner.
In this embodiment, the operation modes of the electronic device at least include a wireless charging transmission mode and an RFID card reading mode, and in some embodiments, the operation modes of the electronic device may further include a wireless charging reception mode and/or an RFID card simulation mode. In practical application, the electronic device may be a wireless charging base, a mobile charging treasure with wireless charging, a bluetooth headset box with reverse wireless charging, and the like.
In a case where the electronic device is in the wireless charging transmission mode, the electronic device now behaves as a wireless charging transmission device, and may perform the following operations: driving a coil in the antenna module to oscillate to realize reverse wireless charging; and determining the transmitting power of the antenna module through the envelope detection circuit and the demodulation circuit.
In a case where the electronic device is in the RFID card reading mode, the electronic device is equivalent to an RFID card reading device at this time, and may perform the following operations: driving a coil in the antenna module to oscillate to realize the card reading function; and determining the card number of the RFID card through the envelope detection circuit and the demodulation circuit.
For the wireless charging transmission mode (or RFID card reading mode), the following method may be specifically used: as shown in fig. 1, the H-bridge driving circuit 23 may drive the coil of the antenna module 30 to oscillate, radiate outwards, and transmit a carrier signal; after the wireless charging receiving equipment (or the RFID card) receives the carrier signal, load modulation is started, so that the amplitude of the carrier changes, and the carrier signal with the load modulation signal is formed at one end, close to the resonant capacitor, of the coil, so that energy receiving (or card number sending) is realized. The carrier wave with the load modulation signal is transmitted to the envelope detection circuit 42, the carrier wave is filtered by the envelope detection circuit 42, the baseband signal is retained, and the baseband signal is transmitted to the demodulation circuit 22. The demodulation circuit 22 is used to demodulate the baseband signal to obtain the charging power (or the card number of the RFID card) expected by the charging receiving device.
Therefore, in the embodiment of the application, the RFID card reading function can be integrated on the electronic equipment supporting the wireless charging function by only adding a small number of elements in a mode of sharing part of hardware, so that the functions of the electronic equipment can be enriched under the condition that the size of the electronic equipment is hardly influenced.
In the embodiment of the application, the wireless charging function and the RFID card reading function can be realized by sharing at least one of the following: a wireless charging circuit; a coil; a matching circuit. The concrete description is as follows:
implementation mode one
Optionally, as shown in fig. 2, the antenna module 30 includes a first coil 31, a first end of the first coil 31 is electrically connected to the first half-bridge driving circuit 231, and a second end of the first coil 31 is electrically connected to the second half-bridge driving circuit 232 through the wireless charging resonant capacitor 41; wherein the first point is a common point between the wireless charging resonant capacitor 41 and the second end of the first coil 31.
In the first embodiment, the wireless charging circuit, the coil and the matching circuit are completely shared, so that the electronic device supports a wireless charging transmission mode and an RFID card reading mode.
1) For wireless charging transmission mode
The H-bridge driving circuit 23 may drive the first coil 31 to oscillate and emit energy in the H-bridge driving mode, and the charge receiving device draws energy through load modulation, so that the oscillating voltage of the first coil 31 varies.
In this case, the envelope detection circuit 42 and the demodulation circuit 22 can obtain the charging power expected by the charging receiving device after demodulating the load modulation signal, and further can trigger the electronic device to adjust the transmitting power of the antenna module 30.
In a specific implementation, the microcontroller 10 may control the first half-bridge driving circuit 231 and the second half-bridge driving circuit 232 to alternately connect to the power source end and ground according to a preset frequency through the micro-control unit 21, that is, at the same time, one of the first half-bridge driving circuit 231 and the second half-bridge driving circuit 232 is connected to the power source end but not connected to the ground, and the other half-bridge driving circuit is not connected to the power source end but connected to the ground. Such as: the first half-bridge driving circuit 231 can be controlled to be connected with a power supply end, and the second half-bridge driving circuit 232 is grounded; then, the first half-bridge driving circuit 231 is controlled to be grounded, and the second half-bridge driving circuit 232 is connected to the power source terminal.
When the power source terminal of the first half-bridge drive circuit 231 is connected to the ground and the second half-bridge drive circuit 232 is connected to the ground, the power source terminal of the first half-bridge drive circuit 231, the first coil 31, the wireless charging resonant capacitor 41 and the ground of the second half-bridge drive circuit 232 form a path, and a current flows from the power source terminal connected to the first half-bridge drive circuit 231 to the ground of the second half-bridge drive circuit 232, thereby forming a forward current.
When the first half-bridge driving circuit 231 is grounded and the second half-bridge driving circuit 232 is connected to the power source terminals, the ground of the first half-bridge driving circuit 231, the first coil 31, the wireless charging resonant capacitor 41 and the power source terminals of the second half-bridge driving circuit 232 form a path, and a current flows from the power source terminal connected to the second half-bridge driving circuit 232 to the ground of the first half-bridge driving circuit 231, thereby forming a reverse current.
Since the first half-bridge driving circuit 231 and the second half-bridge driving circuit 232 are alternately connected to the power source terminal and the ground according to the preset frequency, a reciprocating oscillating current is formed, and the reciprocating oscillating current forms a resonant boost voltage on the first coil 31 to transmit energy to the wireless charging receiving device.
2) For RFID card reading mode
The H-bridge driving circuit 23 can drive the first coil 31 to oscillate and emit energy in an H-bridge driving mode, the RFID card tag obtains energy to start after approaching the coil, and energy is extracted through load modulation, so that the oscillating voltage of the first coil 31 changes.
In this case, the envelope detection circuit 42 and the demodulation circuit 22 demodulate the load modulation signal to obtain the card number of the RFID card, the card number may be transmitted to the microcontroller 10 for recording and saving, and the microcontroller 10 may transmit the card number to the mobile phone terminal in the form of wireless charging communication function or USB connection.
In the first embodiment, the implementation principle of the RFID card reading mode is similar to that of the wireless charging transmission mode, and the microcontroller 10 may control the first half-bridge driving circuit 231 and the second half-bridge driving circuit 232 to alternately communicate with the power source terminal and ground according to a preset frequency through the micro-control unit 21.
Second embodiment
Optionally, as shown in fig. 3, the matching circuit 40 further includes a gating switch 43, a radio frequency identification RFID resonant capacitor 44, and a first switch 45, the first switch 45 being electrically connected to the micro control unit 21;
the antenna module 30 includes a second coil 32, where the second coil 32 includes a common driving (COM) terminal, a Wireless Power Charge (WPC) terminal and an RFID terminal, and the WPC terminal is located between the common driving terminal and the RFID terminal; the driving common end is electrically connected with a first half-bridge driving circuit 231, the wireless charging WPC end is electrically connected with a second half-bridge driving circuit 232 through a wireless charging resonant capacitor 41, and the RFID end is grounded through an RFID resonant capacitor 44 and a first switch 45 in sequence;
the envelope detection circuit 42 is electrically connected to the first point (in this embodiment, the common point between the wireless charging resonant capacitor 41 and the WPC terminal) and the second point (in the figure, B) where the RFID resonant capacitor 44 is electrically connected to the RFID terminal via the gate switch 43.
In the second embodiment, a portion between the driving COM terminal and the WPC terminal of the second coil 32 may correspond to a wireless charging coil, and a portion between the driving COM terminal and the RFID terminal of the second coil 32 may correspond to an RFID recognition coil. Therefore, in order to enable the electronic equipment to realize the RFID technology and the wireless charging technology, the electronic equipment shares part of the coil.
Because the RFID technology and the wireless charging technology share part of the coil, in order to avoid mutual interference between the wireless charging technology and the RFID technology, the RFID resonance capacitor 44 and the first switch 45 are additionally arranged.
In addition, a gating switch is added, so that the envelope detection circuit 42 and the demodulation circuit 22 respectively realize the demodulation of the load modulation signals under different technologies. In particular, the gating switch 43 may turn on the envelope detection circuit 42 and the first point, and the envelope detection circuit 42 and the demodulation circuit 22 are used to determine the charging power desired by the wireless charging reception device. The gate switch 43 may also turn on the envelope detection circuit 42 and the second point, where the envelope detection circuit 42 and the demodulation circuit 22 are used to determine the card number of the RFID card.
As can be seen, in the second embodiment, the matching circuit and the coil are partially shared by the complete sharing of the wireless charging circuit, so that the electronic device supports the wireless charging transmission mode and the RFID card reading mode.
1) For wireless charging transmission mode
Since the RFID identification technology and the wireless charging technology share a part of the coil, in order to prevent the RFID identification function from affecting the wireless charging function, the RFID terminal of the second coil 32 cannot be grounded, and thus, the first switch 45 can be turned off.
The H-bridge driving circuit 23 may drive a portion between the drive COM terminal and the WPC terminal of the second coil 32 to oscillate and emit energy in an H-bridge driving mode, and the charging receiving device extracts energy through load modulation, so that an oscillation voltage of the portion between the drive COM terminal and the WPC terminal of the second coil 32 changes, where a driving method of the H-bridge driving circuit 23 is the same as a driving method of the H-bridge driving circuit 23 in the wireless charging transmission mode in the first embodiment, and reference may be specifically made to the foregoing related description, and details are not repeated here.
The gate switch 43 can turn on the envelope detection circuit 42 and the first point, so that the envelope detection circuit 42 and the demodulation circuit 22 can obtain the charging power expected by the charging receiving device after demodulating the load modulation signal, and further can trigger the electronic device to adjust the transmission power of the antenna module 30.
2) For RFID card reading mode
Since the RFID technology and the wireless charging technology share a part of the coil, in order to avoid the influence of the wireless charging function on the RFID identification function, the WPC terminal of the second coil 32 should be suspended, and thus, the second half-bridge driving control circuit 232 can be controlled to be in an off state.
The H-bridge driving circuit 23 may drive the portion between the driving COM end and the RFID end of the second coil 32 to oscillate and emit energy through the first half-bridge driving control circuit 231, and the RFID card tag gets energy to start up after approaching the coil, and extracts energy through load modulation, so that the oscillating voltage of the portion between the driving COM end and the RFID end of the second coil 32 changes. In this case, the H-bridge drive circuit 23 is in the half-bridge drive mode. To ensure that the RFID resonant capacitor 44 can be grounded, the first switch 45 is turned on.
In a specific implementation, the microcontroller 10 may control the first half-bridge driving circuit 231 to alternately connect to the power source terminal or ground according to a preset frequency through the micro-control unit 21, that is, at the same time, the first half-bridge driving circuit 231 connects to the power source terminal or ground. Such as: the first half-bridge driving circuit 231 may be first controlled to be connected to the power source terminal but not grounded; thereafter, the first half bridge driving circuit 231 is controlled to be grounded but not to be connected to the power source terminal.
When the first half-bridge drive circuit 231 is connected to the power source terminal but not grounded, the power ground of the first half-bridge drive circuit 231, the portion between the drive COM terminal and the RFID terminal of the second coil 32, the RFID resonance capacitor 44, and the ground form a path, and a current flows from the power source terminal connected to the first half-bridge drive circuit 231 to the ground to form a forward current.
In the case where the first half bridge driving circuit 231 is grounded but not connected to the power source terminal, the RFID resonance capacitor 44, a portion between the driving COM terminal of the second coil 32 and the RFID terminal, and the ground of the first half bridge driving circuit 231 constitute a path, and a current flows from the RFID resonance capacitor 44 to the ground of the first half bridge driving circuit 231 to form a reverse current.
Since the first half-bridge driving circuit 231 is alternately connected to the power source terminal or grounded according to the preset frequency, a reciprocating oscillating current is formed, and the reciprocating oscillating current forms a resonance boosting voltage at a portion between the driving COM terminal and the RFID terminal of the second coil 32 to transmit energy to the RFID card.
The gating switch 43 may turn on the envelope detection circuit 42 and the second point, in this case, the envelope detection circuit 42 and the demodulation circuit 22 may obtain the card number of the RFID card after demodulating the load modulation signal, the card number may be transmitted to the microcontroller 10 for recording and storing, and the microcontroller 10 may transmit to the mobile phone terminal through a wireless charging communication function or a USB connection.
Third embodiment
Optionally, as shown in fig. 4, the matching circuit 40 further includes a gate switch 43 and an RFID resonance capacitor 44; the antenna module 30 comprises a wireless charging coil 33 and an RFID coil 34;
a first end of the wireless charging coil 33 is electrically connected with the first half-bridge driving circuit 231, and a second end of the wireless charging coil 33 is electrically connected with the second half-bridge driving circuit 232 through the wireless charging resonant capacitor 41;
a first end of the RFID coil 34 is electrically connected to the first half-bridge driving circuit 231, and a second end of the RFID coil is electrically connected to the second half-bridge driving circuit 232 via the RFID resonant capacitor 44;
the envelope detection circuit 42 is electrically connected to a first point, which is a common point between the wireless charging resonant capacitor 41 and the second end of the wireless charging coil 31, and a second point, which is a common point between the RFID resonant capacitor 44 and the second end of the RFID coil 34, respectively.
In the third embodiment, the wireless charging coil 33 and the RFID coil 34 are completely independently designed, and the RFID resonant capacitor 44 is added. In order to enable the envelope detection circuit 42 and the demodulation circuit 22 to demodulate load modulation signals under different technologies, a gating switch 43 is additionally arranged. In particular, the gating switch 43 may turn on the envelope detection circuit 42 and the first point, and the envelope detection circuit 42 and the demodulation circuit 22 are used to determine the charging power desired by the wireless charging reception device. The gate switch 43 may also turn on the envelope detection circuit 42 and the second point, where the envelope detection circuit 42 and the demodulation circuit 22 are used to determine the card number of the RFID card.
As can be seen from the above, in the third embodiment, the wireless charging coil 33 and the RFID coil 34 are designed completely independently, the wireless charging circuit is shared, the resonant capacitor in the matching circuit is designed independently, and the envelope detection circuit 42 is shared by the gating switch 43, so that the electronic device supports the wireless charging transmission mode and the RFID card reading mode.
1) For wireless charging transmission mode
The H-bridge driving circuit 23 can drive the wireless charging coil 33 to oscillate and emit energy in an H-bridge driving mode, and the charging receiving device extracts energy through load modulation, so that the oscillating voltage of the wireless charging coil 33 changes. In this case, the driving method of the H-bridge driving circuit 23 is the same as the driving method of the H-bridge driving circuit 23 in the wireless charging transmission mode of the first embodiment, and reference may be specifically made to the foregoing related description, which is not repeated herein.
The gate switch 43 can turn on the envelope detection circuit 42 and the first point, so that the envelope detection circuit 42 and the demodulation circuit 22 can obtain the charging power expected by the charging receiving device after demodulating the load modulation signal, and further can trigger the electronic device to adjust the transmission power of the antenna module 30.
2) For RFID card reading mode
Because the resistance of wireless charging coil 33 is less than the resistance of RFID coil 34, for avoiding the direct flow of current to wireless charging coil 33, lead to wireless charging coil 33 to influence RFID discernment performance, can control second half-bridge drive control circuit 232 and be in the state of not communicating but ground connection with the power end.
The H-bridge driving circuit 23 can drive the RFID coil 34 to oscillate and emit energy through the first half-bridge driving control circuit 231, and the RFID card tag gets energy to start after approaching the coil, and draws energy through load modulation, so that the oscillating voltage of the RFID coil 34 changes. In this case, the H-bridge drive circuit 23 is in the half-bridge drive mode.
In a specific implementation, the microcontroller 10 may control the first half-bridge driving circuit 231 to alternately connect to the power source terminal or ground according to a predetermined frequency through the micro-control unit 21, and for the specific implementation, reference may be made to the foregoing related description, which is not repeated herein.
The gating switch 43 may turn on the envelope detection circuit 42 and the second point, in this case, the envelope detection circuit 42 and the demodulation circuit 22 may obtain the card number of the RFID card after demodulating the load modulation signal, the card number may be transmitted to the microcontroller 10 for recording and storing, and the microcontroller 10 may transmit to the mobile phone terminal through a wireless charging communication function or a USB connection.
In the embodiment of the present application, optionally, as shown in fig. 2 to fig. 4, the first half-bridge driving circuit 231 may include a first field-effect MOS transistor 2311 and a second MOS transistor 2312, the second half-bridge driving circuit 232 may include a third MOS transistor 2321 and a fourth MOS transistor 2322, the first MOS transistor 2311 and the third MOS transistor 2321 may be P-type MOS transistors, and the second MOS transistor 2312 and the fourth MOS transistor 2322 may be N-type MOS transistors;
the gates of the first MOS transistor 2311, the second MOS transistor 2312, the third MOS transistor 2321 and the fourth MOS transistor 2322 are all electrically connected with the micro control unit 21; the source electrodes of the first MOS tube 2311 and the third MOS tube 2321 are electrically connected with a power supply end; the drain electrode of the first MOS transistor 2311 is electrically connected with the drain electrode of the second MOS transistor 2312, and the drain electrode of the third MOS transistor 2321 is electrically connected with the drain electrode of the fourth MOS transistor 2322; the sources of the second MOS transistor 2312 and the fourth MOS transistor 2322 are both grounded;
the fourth point and the fifth point are both electrically connected to the antenna module 30, the fourth point is a common point between the drain of the first MOS transistor 2311 and the drain of the second MOS transistor 2312, and the fifth point is a common point between the drain of the third MOS transistor 2321 and the drain of the fourth MOS transistor 2322.
In the case that the first half-bridge driving circuit 231 is connected to the power source terminal but not grounded, the first MOS transistor 2311 may be turned on and the second MOS transistor 2312 may be turned off. In the case that the first half-bridge driving circuit 231 is not connected to the power source terminal but is grounded, the first MOS transistor 2311 may be turned off and the second MOS transistor 2312 may be turned on. In the case where the first half bridge driving circuit 231 is in an off state, the first and second MOS transistors 2311 and 2312 may be turned off.
In the case that the second half-bridge driving circuit 232 is connected to the power source but not grounded, the third MOS transistor 2321 may be turned on, and the fourth MOS transistor 2322 may be turned off. In the case that the second half-bridge driving circuit 232 is not connected to the power source terminal but is grounded, the third MOS transistor 2321 may be turned off, and the fourth MOS transistor 2322 may be turned on. In the case where the second half-bridge driving circuit 232 is in the off state, the third MOS transistor 2321 and the fourth MOS transistor 2322 may be turned off.
In some embodiments, the half-bridge driving circuit may be configured by other switches, which may be determined according to actual conditions, and this is not limited in the examples of the present application. In addition, although the first switch 45 in fig. 3 is also represented by a MOS transistor, in another embodiment, the first switch 45 may be a switch having another expression, such as a single-pole double-throw switch.
Referring to fig. 5, fig. 5 is a flowchart of a control method provided in an embodiment of the present application. As shown in fig. 5, the control method may include the steps of:
In specific implementation, the electronic device may communicate with the receiving device to determine the operating mode of the electronic device.
And 502, controlling the working state of the electronic equipment according to the first working mode.
It can be understood that the operating state of the electronic device may enable the electronic device to implement the function corresponding to the first operating mode.
According to the control method, the working modes of the electronic equipment comprise a wireless charging emission mode and an RFID card reading mode, so that the electronic equipment can realize a wireless charging function and an RFID card reading function, and the functions of the electronic equipment are enriched.
Optionally, the first half-bridge driving circuit includes the first MOS transistor and the second MOS transistor, and the second half-bridge driving circuit includes the third MOS transistor and the fourth MOS transistor.
Optionally, the first operating mode is an RFID card reading mode;
the controlling the working state of the electronic device according to the first working mode includes:
under the condition that the antenna module comprises the first coil, alternately switching on and switching off a first target MOS transistor and a second target MOS transistor according to a preset frequency, wherein the first target MOS transistor comprises the first MOS transistor and the fourth MOS transistor, and the second target MOS transistor comprises the second MOS transistor and the third MOS transistor;
under the condition that the antenna module comprises the second coil, the first MOS tube and the second MOS tube are alternately switched on and off according to a preset frequency, the first switch is switched on, the third MOS tube and the fourth MOS tube are switched off, and the gating switch is controlled to switch on the second point and the envelope detection circuit;
and under the condition that the antenna module comprises the wireless charging antenna and the RFID coil, the first MOS tube and the second MOS tube are alternately switched on and off according to a preset frequency, the fourth MOS tube is switched on, the third MOS tube is switched off, and the gating switch is controlled to switch on the second point and the envelope detection circuit.
Optionally, the first operating mode is a wireless charging transmission mode;
the controlling the working state of the electronic device according to the first working mode includes:
under the condition that the antenna module comprises the first coil, alternately switching on and switching off a first target MOS tube and a second target MOS tube according to a preset frequency;
and under the condition that the antenna module comprises the second coil, alternately switching on and off a first target MOS tube and a second target MOS tube according to a preset frequency, switching off the first switch, and controlling the gating switch to switch on the first point and the envelope detection circuit.
Under the condition that the antenna module comprises the wireless charging antenna and the RFID coil, a first target MOS tube and a second target MOS tube are alternately switched on and off according to a preset frequency, and the gating switch is controlled to switch on the first point and the envelope detection circuit;
the first target MOS tube comprises the first MOS tube and the fourth MOS tube, and the second target MOS tube comprises the second MOS tube and the third MOS tube.
Optionally, the first working mode is an RFID card reading mode, and the card number of the device to be charged is identified as a first card number through the first working mode;
after controlling the operating state of the electronic device according to the first operating mode, the method further includes:
determining whether the first card number is a legal charging card number;
and controlling the electronic equipment to switch to a wireless charging transmission mode under the condition that the first card number is a legal charging card number.
In this alternative embodiment, the electronic device only allows wireless charging of the charge-receiving device for a legitimate charge card number. When the charging receiving device expects to be charged through the electronic device, the electronic device can firstly identify the card number of the charging receiving device, then determine whether the card number is a legal charging card number, if so, switch to a wireless charging transmission mode to wirelessly charge the device, otherwise, abandon the wireless charging of the device, and thus, the charging safety can be improved.
It should be noted that, when the first operating mode is a wireless charging transmission mode or an RFID card reading mode, reference may be made to the foregoing related description for the operating states of the components of the electronic device, and details are not described herein again.
The various optional implementations described in the embodiments of the present application may be implemented in combination with each other or implemented separately without conflicting with each other, and the embodiments of the present application are not limited to this.
For ease of understanding, examples are illustrated below:
the method comprises the steps that a card reading function is integrated on the electronic equipment supporting the wireless charging and transmitting function in a mode of sharing part of hardware, card numbers are automatically stored after the card reading, and the card numbers are transmitted to terminal equipment such as a mobile phone and the like in a wireless charging mode, a wired USB mode, a Bluetooth mode or an NFC mode; the electronic device includes but is not limited to a wireless charging base, a mobile charging treasure with wireless charging, a Bluetooth headset box with reverse wireless charging and the like.
The specific innovation points are as follows:
(1) part or all of the hardware of wireless charging is shared, and the wireless charging and 125K RFID card reading functions are realized simultaneously; the common hardware portion is not limited to an IC, an antenna, a matching circuit, and the like;
(2) multiple functions may be implemented by a single IC;
(3) the external shared circuitry may be implemented in a variety of ways to improve performance and to achieve non-interfering conditions.
The electronic equipment mainly comprises a microcontroller, a coil driving circuit, a coil antenna, an envelope detection circuit and a demodulation circuit.
The microcontroller realizes the functions of system integral control, card number storage, USB connection and the like;
the coil driving circuit is responsible for realizing the oscillation driving of the coil;
the coil antenna is responsible for transmitting field intensity and receiving signals;
the envelope detection circuit filters the carrier and reserves the baseband signal;
the demodulation circuit is responsible for demodulating the signal.
In specific implementation, there are a plurality of embodiments according to the difference between the wireless charging function and the RFID card reading function, and the specific description is as follows:
in the first embodiment, the wireless charging hardware is completely shared.
As shown in fig. 2, the wireless charging IC (i.e., wireless charging circuit), the coil antenna, the envelope detection circuit, the demodulation circuit, and other hardware are all commonly used.
The coil driving structure in the wireless charging IC is an H-bridge drive, and is composed of two P-MOS transistors and two N-MOS transistors, i.e., a first MOS transistor 2311, a second MOS transistor 2312, a third MOS transistor 2321, and a fourth MOS transistor 2322 in fig. 2.
One end of the coil antenna is connected to the driving MOS of the first half-bridge driving circuit, the other end of the coil antenna is connected to the driving MOS of the second half-bridge driving circuit after passing through the resonant capacitor, and the coil antenna and the resonant capacitor can form oscillation and radiate outwards after being driven by the H-bridge driving circuit; a receiving device (e.g., a card, a wireless charging receiving device) receives energy.
The envelope detection and demodulation circuit is a self-contained function of the wireless charging transmitting equipment, is designed for receiving protocol information informed by an opposite party, such as charging power and the like, and can be used for load modulation receiving of a card; the input of the envelope detection circuit needs to be connected to the common point of the coil and the resonant capacitor to receive the load modulation signal.
The electronic equipment has two working modes, which are respectively as follows:
wireless charging and transmitting mode: the coil driving module is driven in an H-bridge driving mode, a driving coil (which is equivalent to a wireless charging coil or an antenna) oscillates and emits energy, corresponding receiving equipment extracts energy through load modulation, so that the oscillating voltage of a coil at a transmitting end changes, and a detection circuit and an internal demodulation circuit are used for sending corresponding power according to the requirement of an opposite party after the load modulation signal is demodulated;
the first MOS transistor and the fourth MOS transistor are alternately turned on at a specific driving frequency, which is as follows: the first MOS tube and the fourth MOS tube are conducted at the same time, and the second MOS tube and the third MOS tube are disconnected to form forward current; then the second MOS tube and the third MOS tube are simultaneously conducted, and the first MOS tube and the fourth MOS tube are switched off to form reverse current; the current oscillating back and forth will form a resonant boost on the coil, transferring energy to the opposing device.
② 125K low-frequency RFID card reading mode: similar to the aforementioned first wireless charging transmission mode, the coil driving module drives the coil (which is equivalent to a 125K low-frequency RFID coil or antenna at this time) to oscillate, the RFID card tag gets energy to start after approaching the coil, and extracts energy through load modulation, so that the oscillating voltage of the coil at the transmission end changes, at this time, after the demodulation of the load modulation signal is realized by the 'including detection circuit' and 'internal demodulation circuit', the card number information of the approaching RFID card tag is known, and after the card number is recorded and stored by the MCU, the card number can be transmitted to the mobile phone through a wireless charging communication function or USB connection or other forms.
The first MOS transistor and the fourth MOS transistor are alternately turned on at a specific driving frequency, which is as follows: the first MOS tube and the fourth MOS tube are conducted at the same time, and the second MOS tube and the third MOS tube are disconnected to form forward current; then the second MOS tube and the third MOS tube are simultaneously conducted, and the first MOS tube and the fourth MOS tube are switched off to form reverse current; the current oscillating back and forth can form resonance boosting on the coil and transmit energy to the opposite equipment;
in the second embodiment, the wireless charging circuit is shared and the antenna is designed in a hybrid mode.
As shown in fig. 3, the wireless charging IC, the envelope detection, the demodulation and other hardware are shared, but the design is performed by using a form of partially sharing the wireless charging antenna, that is, a hybrid antenna;
the coil driving structure in the wireless charging IC is an H-bridge drive, and is composed of two P-MOS transistors and two N-MOS transistors, i.e., a first MOS transistor 2311, a second MOS transistor 2312, a third MOS transistor 2321, and a fourth MOS transistor 2322 in fig. 3.
The hybrid coil antenna is provided with three taps, namely a driving COM end, a driving WPC end and a driving RFID end; the COM end of the winding is connected to the driving MOS, the WPC end is a middle tap and is connected to the driving MOS after passing through the resonant capacitor, and the RFID end is connected to the 125K resonant capacitor and then the first switch is grounded; after being driven by the H-bridge driving circuit, the resonant capacitor and the H-bridge driving circuit can oscillate and radiate outwards; receiving energy by a receiving device (such as a card or a wireless charging receiving device);
the envelope detection and demodulation circuit is a self-contained function of the wireless charging transmitting equipment, is designed for receiving protocol information informed by an opposite party, such as charging power and the like, and can be used for load modulation receiving of a card; the input of the envelope detection circuit needs to be connected to the common point of the coil and the resonant capacitor to receive the load modulation signal, and the gate switch is switched to the corresponding path.
The electronic equipment has two working modes, which are respectively as follows:
wireless charging and transmitting mode: the coil driving module is driven to be in an H-bridge driving mode, the wireless charging antenna is driven to oscillate and emit energy, the corresponding receiving equipment extracts energy through load modulation, the oscillating voltage of the coil at the transmitting end changes, and at the moment, the 'detection circuit' and the 'internal demodulation circuit' realize that corresponding power is sent according to the requirement of the other party after the load modulation signal is demodulated.
The first MOS transistor and the fourth MOS transistor are alternately turned on at a specific driving frequency, which is as follows: the first MOS tube and the fourth MOS tube are conducted at the same time, and the second MOS tube and the third MOS tube are disconnected to form forward current; then the second MOS tube and the third MOS tube are simultaneously conducted, and the first MOS tube and the fourth MOS tube are switched off to form reverse current; the current oscillating back and forth can form resonance boosting on the coil and transmit energy to the opposite equipment; in order not to influence the wireless charging function, the first switch of the RFID resonant capacitor grounding is in a turn-off state; and the gating switch controls the GPIO to switch the gating switch to a wireless charging end, namely an antenna WPC end.
② 125K low-frequency RFID card reading mode: similar to the wireless charging and transmitting mode, the coil driving module drives the 125K low-frequency RFID antenna to oscillate, the RFID card tag obtains energy to start after approaching the coil, and extracts energy through load modulation, so that the oscillating voltage of the coil at the transmitting end changes, at the moment, the demodulation of a load modulation signal is realized by the detection circuit and the internal demodulation circuit, the card number information of the approaching RFID card tag is obtained, and the card number is recorded and stored by the MCU and then can be transmitted to the mobile phone terminal through the wireless charging communication function or USB connection and other forms.
The first MOS tube and the second MOS tube are conducted alternately at a specific driving frequency, and the fifth MOS tube needs to be conducted continuously to ensure that the resonant capacitor can be grounded; in order to avoid the influence of the WPC end of the coil middle tap on the RFID performance, the third MOS tube and the fourth MOS tube are required to be ensured to be in a turn-off state; in half-bridge driving mode and the gate switch needs to be switched to the RFID terminal.
In the third embodiment, the wireless charging circuit is shared, and the antenna is designed independently.
As shown in fig. 4, the wireless charging IC, the envelope detection, the demodulation, and other hardware are shared, and the antenna is designed completely independently.
The coil driving structure in the wireless charging IC is an H-bridge drive, and is composed of two P-MOS transistors and two N-MOS transistors, i.e., a first MOS transistor 2311, a second MOS transistor 2312, a third MOS transistor 2321, and a fourth MOS transistor 2322 in fig. 4.
The electronic equipment is provided with two independent coil antennas, one end of a first half-bridge driving circuit is simultaneously connected to one end of two coils, the other two ports are respectively a WPC end and an RFID end, wherein the WPC coil end is connected to a second half-bridge driving circuit (namely a third MOS tube and a fourth MOS tube) after passing through a wireless charging resonant capacitor, and the RFID end is connected to a 125K resonant capacitor (namely an RFID resonant capacitor) and then connected to a second half-bridge driving circuit (namely a third MOS tube and a fourth MOS tube) for driving the MOS; after being driven by the H-bridge driving circuit, the resonant capacitor and the H-bridge driving circuit can oscillate and radiate outwards; a receiving device (e.g., a card, a wireless charging receiving device) receives energy.
The envelope detection and demodulation circuit is a self-contained function of the wireless charging transmitting equipment, is designed for receiving protocol information informed by an opposite party, such as charging power and the like, and can be used for load modulation receiving of a card; the input of the envelope detection circuit needs to be connected to the common point of the coil and the resonant capacitor to receive the load modulation signal. And the gating switch is to be switched to the corresponding path.
The electronic equipment has two working modes, which are respectively as follows:
the wireless charging transmission mode is as follows: the coil driving module is driven to be in an H-bridge driving mode, drives the wireless charging antenna to oscillate and emit energy, and corresponding receiving equipment extracts energy through load modulation, so that the oscillating voltage of the coil at the transmitting end changes, and at the moment, the coil driving module ' comprises a detection circuit ' and an internal demodulation circuit ' realize the demodulation of a load modulation signal and then sends corresponding power according to the requirement of the other party;
the first MOS transistor and the fourth MOS transistor are alternately turned on at a specific driving frequency, which is as follows: the first MOS tube and the fourth MOS tube are conducted at the same time, and the second MOS tube and the third MOS tube are disconnected to form forward current; then the second MOS tube and the third MOS tube are simultaneously conducted, and the first MOS tube and the fourth MOS tube are switched off to form reverse current; the current oscillating back and forth can form resonance boosting on the coil and transmit energy to the opposite equipment; the wireless charging function is not affected, and the gating switch is switched to the wireless charging path.
Fourthly, a 125K low-frequency RFID card reading mode: similar to the wireless charging and transmitting mode, the coil driving module drives the 125K low-frequency RFID antenna to oscillate, the RFID card tag obtains energy to start after approaching the coil, and extracts energy through load modulation, so that the oscillating voltage of the coil at the transmitting end changes, at the moment, the demodulation of a load modulation signal is realized by the detection circuit and the internal demodulation circuit, the card number information of the approaching RFID card tag is obtained, and the card number is recorded and stored by the MCU and then can be transmitted to the mobile phone terminal through the wireless charging communication function or USB connection and other forms.
The first MOS tube and the second MOS tube are conducted alternately at a specific driving frequency, and the MOS tube IV needs to be conducted continuously to ensure that the resonant capacitor can be grounded; in order to avoid the influence of the WPC end of the coil center tap on the RFID performance, the connection state needs to be ensured; and the gating switch needs to be switched to the RFID card reading path.
And fourthly, reading the card through the RFID to identify the exclusive mobile phone and starting the personalized function.
After the device has the RFID card reading function, more interaction between terminals such as mobile phones and the like supporting RFID card numbers and the charging base can be realized, the RFID card numbers and the wireless charging base are utilized to carry out transparent transmission, and the safety can be improved.
For ease of understanding, please refer to fig. 6.
As shown in fig. 6, the control method may include the steps of:
At step 602, it is determined whether the read card number is a proprietary protocol card number (i.e., a legal charging card number).
If yes, go to step 603; otherwise, step 604 is performed.
If yes, go to step 604; otherwise, step 601 is executed.
The read card number is transmitted to the microcontroller, step 604.
The wireless charging and 125K RFID technology can be realized simultaneously by sharing wireless charging hardware of the wireless charging base and only adding a small amount of external hardware; by optimizing corresponding circuit design, two functions can share part of hardware without mutual influence; the antenna volume can be minimized and the cost can be optimized by the hybrid antenna design.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. An electronic device is characterized by comprising a microcontroller, a wireless charging circuit, an antenna module and a matching circuit; the matching circuit comprises a wireless charging resonant capacitor and an envelope detection circuit; the wireless charging circuit comprises a micro control unit, a demodulation circuit and an H-bridge driving circuit; wherein:
the H-bridge driving circuit comprises a first half-bridge driving circuit and a second half-bridge driving circuit, the first ends of the first half-bridge driving circuit and the second half-bridge driving circuit are electrically connected with a power supply end, the second ends of the first half-bridge driving circuit and the second half-bridge driving circuit are grounded, the first half-bridge driving circuit is electrically connected with the second half-bridge driving circuit through the antenna module and the wireless charging resonant capacitor in sequence, and the H-bridge driving circuit is used for driving the antenna module to work in a wireless charging emission mode or an RFID card reading mode;
the micro-control unit is electrically connected with the microcontroller, the demodulation circuit, the first half-bridge driving circuit and the second half-bridge driving circuit respectively;
the envelope detection circuit is respectively electrically connected with the demodulation circuit and a first point, and the first point is a common point between the wireless charging resonant capacitor and the antenna module.
2. The electronic device according to claim 1, wherein the antenna module comprises a first coil, a first end of the first coil is electrically connected to the first half-bridge driving circuit, and a second end of the first coil is electrically connected to the second half-bridge driving circuit via the wireless charging resonant capacitor;
wherein the first point is a common point between the wireless charging resonant capacitor and the second end of the first coil.
3. The electronic device of claim 1, wherein the matching circuit further comprises a gating switch, a Radio Frequency Identification (RFID) resonant capacitor, and a first switch, the first switch being electrically connected to the micro-control unit;
the antenna module comprises a second coil, the second coil comprises a driving public end, a wireless charging WPC end and an RFID end, and the WPC end is located between the driving public end and the RFID end; the driving common end is electrically connected with the first half-bridge driving circuit, the wireless charging WPC end is electrically connected with the second half-bridge driving circuit through the wireless charging resonant capacitor, and the RFID end is grounded through the RFID resonant capacitor and the first switch in sequence;
the envelope detection circuit is electrically connected with the first point and the second point through the gating switch respectively, the first point is a common point between the wireless charging resonance capacitor and the WPC end, and the second point is that the RFID resonance capacitor is electrically connected with the RFID end.
4. The electronic device of claim 1, wherein the matching circuit further comprises a gating switch and an RFID resonant capacitor; the antenna module comprises a wireless charging coil and an RFID coil;
the first end of the wireless charging coil is electrically connected with the first half-bridge driving circuit, and the second end of the wireless charging coil is electrically connected with the second half-bridge driving circuit through the wireless charging resonant capacitor;
the first end of the RFID coil is electrically connected with the first half-bridge driving circuit, and the second end of the RFID coil is electrically connected with the second half-bridge driving circuit through the RFID resonant capacitor;
the envelope detection circuit is respectively electrically connected with a first point and a second point, the first point is a common point between the wireless charging resonance capacitor and the second end of the wireless charging coil, and the second point is a common point between the RFID resonance capacitor and the second end of the RFID coil.
5. The electronic device according to any one of claims 1 to 4, wherein the first half-bridge driving circuit comprises a first field-effect MOS transistor and a second MOS transistor, the second half-bridge driving circuit comprises a third MOS transistor and a fourth MOS transistor, the first MOS transistor and the third MOS transistor are P-type MOS transistors, and the second MOS transistor and the fourth MOS transistor are N-type MOS transistors;
the grid electrodes of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube are electrically connected with the micro control unit; the source electrodes of the first MOS tube and the third MOS tube are electrically connected with a power supply end; the drain electrode of the first MOS tube is electrically connected with the drain electrode of the second MOS tube, and the drain electrode of the third MOS tube is electrically connected with the drain electrode of the fourth MOS tube; the source electrodes of the second MOS tube and the fourth MOS tube are grounded;
and the fourth point and the fifth point are both electrically connected with the antenna module, the fourth point is a common point between the drain electrode of the first MOS tube and the drain electrode of the second MOS tube, and the fifth point is a common point between the drain electrode of the third MOS tube and the drain electrode of the fourth MOS tube.
6. The electronic device of any of claims 1-4, wherein the operating mode of the electronic device comprises: a wireless charging transmission mode and an RFID card reading mode.
7. The electronic device of any of claims 1-4, wherein the envelope detection circuit and the demodulation circuit are configured to: determining the transmitting power of the antenna module; the card number of the RFID card is determined.
8. A control method applied to an electronic apparatus according to any one of claims 1 to 7, the method comprising:
determining a first working mode of the electronic equipment, wherein the first working mode is a wireless charging transmission mode or an RFID card reading mode;
and controlling the working state of the electronic equipment according to the first working mode.
9. The control method according to claim 8, wherein the first half-bridge driving circuit comprises the first MOS transistor and the second MOS transistor, and the second half-bridge driving circuit comprises the third MOS transistor and the fourth MOS transistor.
10. The method of claim 9, wherein the first mode of operation is an RFID card reading mode;
the controlling the working state of the electronic device according to the first working mode includes:
under the condition that the antenna module comprises the first coil, alternately switching on and switching off a first target MOS transistor and a second target MOS transistor according to a preset frequency, wherein the first target MOS transistor comprises the first MOS transistor and the fourth MOS transistor, and the second target MOS transistor comprises the second MOS transistor and the third MOS transistor;
under the condition that the antenna module comprises the second coil, the first MOS tube and the second MOS tube are alternately switched on and off according to a preset frequency, the first switch is switched on, the third MOS tube and the fourth MOS tube are switched off, and the gating switch is controlled to switch on the second point and the envelope detection circuit;
and under the condition that the antenna module comprises the wireless charging antenna and the RFID coil, the first MOS tube and the second MOS tube are alternately switched on and off according to a preset frequency, the fourth MOS tube is switched on, the third MOS tube is switched off, and the gating switch is controlled to switch on the second point and the envelope detection circuit.
11. The method of claim 9, wherein the first operating mode is a wireless charging transmission mode;
the controlling the working state of the electronic device according to the first working mode includes:
under the condition that the antenna module comprises the first coil, alternately switching on and switching off a first target MOS tube and a second target MOS tube according to a preset frequency;
and under the condition that the antenna module comprises the second coil, alternately switching on and off a first target MOS tube and a second target MOS tube according to a preset frequency, switching off the first switch, and controlling the gating switch to switch on the first point and the envelope detection circuit.
Under the condition that the antenna module comprises the wireless charging antenna and the RFID coil, a first target MOS tube and a second target MOS tube are alternately switched on and off according to a preset frequency, and the gating switch is controlled to switch on the first point and the envelope detection circuit;
the first target MOS tube comprises the first MOS tube and the fourth MOS tube, and the second target MOS tube comprises the second MOS tube and the third MOS tube.
12. The method according to any one of claims 8 to 11, wherein the first operation mode is an RFID card reading mode, and the card number of the device to be charged is identified as a first card number through the first operation mode;
after controlling the operating state of the electronic device according to the first operating mode, the method further includes:
determining whether the first card number is a legal charging card number;
and controlling the electronic equipment to switch to a wireless charging transmission mode under the condition that the first card number is a legal charging card number.
Priority Applications (2)
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| CN202111095322.5A CN113708512A (en) | 2021-09-17 | 2021-09-17 | Electronic device and control method |
| PCT/CN2022/118542 WO2023040847A1 (en) | 2021-09-17 | 2022-09-13 | Electronic device and control method |
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| CN202111095322.5A CN113708512A (en) | 2021-09-17 | 2021-09-17 | Electronic device and control method |
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| CN116846028A (en) * | 2022-07-05 | 2023-10-03 | 深圳市好斯美科技有限公司 | Automatic startup control method for judging intervention mutual inductance of wireless receiving equipment |
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| WO2023040847A1 (en) * | 2021-09-17 | 2023-03-23 | 维沃移动通信有限公司 | Electronic device and control method |
| CN116846028A (en) * | 2022-07-05 | 2023-10-03 | 深圳市好斯美科技有限公司 | Automatic startup control method for judging intervention mutual inductance of wireless receiving equipment |
| CN116846028B (en) * | 2022-07-05 | 2024-05-28 | 深圳市好斯美科技有限公司 | Automatic startup control method for judging intervention mutual inductance of wireless receiving equipment |
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