CN108879977A - A kind of wireless charging transmitting equipment and control method - Google Patents
A kind of wireless charging transmitting equipment and control method Download PDFInfo
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- CN108879977A CN108879977A CN201810663445.6A CN201810663445A CN108879977A CN 108879977 A CN108879977 A CN 108879977A CN 201810663445 A CN201810663445 A CN 201810663445A CN 108879977 A CN108879977 A CN 108879977A
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- signal strength
- received signal
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- wireless charging
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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
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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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
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- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Telephone Function (AREA)
Abstract
The present invention provides a kind of wireless charging transmitting equipment and control methods, are related to electronic technology field, solve the problems, such as that wireless charging influences mobile terminal receiving sensitivity.Wireless charging emits equipment：Driving circuit generates the driving signal changed over time；First switch circuit, including at least two first switch tubes；At least two second switch circuits, each second switch circuit are connected to one between first switch tube and driving circuit；When second switch circuit is in an off state, first switch tube is directly connect with driving circuit, has the first driving capacitor；When second switch circuit is in the conductive state, first switch tube is connect by second switch circuit with driving circuit, has the second driving capacitor；First driving capacitor is less than the second driving capacitor；Transmitting coil, transmitting coil generate electromagnetic field at least two first switch tube alternate conductions and disconnection.The receptivity of mobile terminal when the solution of the present invention improves wireless charging.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of wireless charging transmitting equipment and control method.
Background technique
With the development of wireless charging technology, wireless charging function in terminal device using more more and more universal, have
The terminal device of wireless charging function is also increasingly favored by user.One of most important technology development of wireless charging at present is increasing
Add charge power, i.e., wireless fast charge technology, purpose is to shorten the charging duration of terminal device, reaches good user's charge bulk
It tests.
But from the point of view of the state of the art of current wireless charging, due in wireless charging system, the switching frequency of high frequency
F changes according to Fourier, and switching signal is similar to square wave, then will be generated on frequency domain using f as the higher hamonic wave of fundamental wave point
Amount, if the higher harmonic components of high frequency are just in the bandwidth of receiver, it will influence the receiving sensitivity of mobile terminal, deteriorate
Speech quality.
Summary of the invention
The embodiment of the present invention provides a kind of wireless charging transmitting equipment and control method, to solve wireless charging in the prior art
The problem of electricity will affect the receiving sensitivity of mobile terminal, deteriorate speech quality.
In order to solve the above-mentioned technical problem, the invention is realized in this way：A kind of wireless charging transmitting equipment, including：
Driving circuit, the driving circuit generate the driving signal changed over time；
First switch circuit, the first switch circuit include at least two first switch tubes, described at least two first
Switching tube alternate conduction and disconnection under the driving of the driving signal；
At least two second switch circuits, each second switch circuit are connected to the first switch tube
Between the driving circuit；
When the second switch circuit is in an off state, the first switch tube directly connects with the driving circuit
It connects, the first switch tube has the first driving capacitor；
When the second switch circuit is in the conductive state, the first switch tube by the second switch circuit with
The driving circuit connection, the first switch tube have the second driving capacitor；Wherein the first driving capacitor is less than described
Second driving capacitor；
Transmitting coil, the transmitting coil and the first switch circuit connection, the transmitting coil is described at least two
When a first switch tube alternate conduction and disconnection, electromagnetic field is generated.
The embodiments of the present invention also provide a kind of control method of as above described in any item wireless chargings transmitting equipment,
Including：
Obtain the first received signal strength when mobile terminal does not carry out wireless charging and second when carrying out wireless charging
Received signal strength；
When second received signal strength is less than first received signal strength, and first received signal strength
When being more than preset threshold with the difference of second received signal strength, the second switch circuit conducting is controlled.
In embodiments of the present invention, wireless charging transmitting equipment includes driving circuit, first switch circuit, at least two the
Two switching circuits and transmitting coil, driving circuit generate the driving signal changed over time；First switch circuit includes at least two
A first switch tube, at least two first switch tubes alternate conduction and disconnection under the driving of driving signal；Each second switch
Circuit is connected to one between first switch tube and driving circuit；When second switch circuit is in an off state, first
Switching tube is directly connect with driving circuit, and first switch tube has the first driving capacitor；Shape is in second switch circuit
When state, first switch tube is connect by second switch circuit with driving circuit, and first switch tube has the second driving capacitor；Wherein
First driving capacitor is less than the second driving capacitor；Transmitting coil and first switch circuit connection, transmitting coil is at least two the
When one switching tube alternate conduction and disconnection, electromagnetic field is generated.So opened by increasing between first switch tube and driving circuit
Control is closed, the driving capacitor of first switch tube can be changed, to change the speed of driving signal rising edge and failing edge, to subtract
Small driving signal generates the harmonic component of interference signal, reduces interference of the wireless charging to mobile terminal, improves wireless
The receptivity of mobile terminal, improves speech quality when charging.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that wireless charging provided in an embodiment of the present invention emits equipment；
Fig. 2 is the structural schematic diagram that wireless charging provided in an embodiment of the present invention emits second switch circuit in equipment；
Fig. 3 is one of the schematic diagram that wireless charging provided in an embodiment of the present invention emits driving signal in equipment；
Fig. 4 is that wireless charging provided in an embodiment of the present invention emits two of the schematic diagram of driving signal in equipment；
Fig. 5 is the structure that wireless charging provided in an embodiment of the present invention emits the compatible wireless charging receiving device of equipment
Schematic diagram；
Fig. 6 is one of the flow chart of control method that wireless charging provided in an embodiment of the present invention emits equipment；
Fig. 7 is the two of the flow chart for the control method that wireless charging provided in an embodiment of the present invention emits equipment.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In some embodiments of the invention, a kind of wireless charging transmitting equipment is provided, referring to Fig.1, shown in 2, including：
Driving circuit 10, the driving circuit 10 generate the driving signal changed over time；
First switch circuit 20, the first switch circuit 20 include at least two first switch tubes 21, described at least two
A first switch tube 21 alternate conduction and disconnection under the driving of the driving signal；
At least two second switch circuits 30, each second switch circuit 30 are connected to one described first and open
It closes between pipe 21 and the driving circuit 10；
When the second switch circuit 30 is in an off state, the first switch tube 21 directly with the driving circuit
10 connections, the first switch tube 21 have the first driving capacitor；
When the second switch circuit 30 is in the conductive state, the first switch tube 21 passes through the second switch electricity
Road 30 is connect with the driving circuit 10, and the first switch tube 21 has the second driving capacitor；Wherein the first driving electricity
Hold and is less than the second driving capacitor；
Transmitting coil 40, the transmitting coil 40 are connect with the first switch circuit 20, and the transmitting coil 40 is in institute
When stating at least two first switch tubes, 21 alternate conduction and disconnecting, electromagnetic field is generated.
Emit equipment in the wireless charging of the embodiment of the present invention, by increasing between first switch tube 21 and driving circuit 10
Add switch control, the driving capacitor of first switch tube 21 can be changed, to change the speed of driving signal rising edge and failing edge,
To reduce the harmonic component that driving signal generates interference signal, interference of the wireless charging to mobile terminal is reduced, is improved
The receptivity of mobile terminal, improves speech quality when wireless charging.
Wherein, driving signal such as can be square wave, sine wave or other types of oscillation wave.
For example, driving signal uses square wave.The driving signal of driving circuit 10 will be turned on or off first switch tube 21, need
Want driving signal first to the driving capacitor charging of first switch tube 21 or electric discharge.It is in the conductive state in second switch circuit 30
When, the driving capacitor of first switch tube 21 increases, so that Voltage Establishment time or voltage when closing when first switch tube 21 is opened
Release time is slack-off, i.e. the switching speed of first switch tube 21 is slack-off.So being in an off state in second switch circuit 30
When, for the square-wave signal f issued by driving circuit 10 as shown in figure 3, when second switch circuit 30 is in the conductive state, driving is electric
The rising edge for the square-wave signal that road 10 issues and the switch speed of failing edge are slack-off, signal waveform f1 such as Fig. 4 institute of square-wave signal
Show.F1 is compared with f, and the frequency content of f1 ratio f is less, and the harmonic component of generation is less, so, at second switch circuit 30
When on state, reduce the high-frequency signal harmonic component (note that can generate interference：The square wave of one standard is infinite multiple
The superposition of just profound wave, the edge of square wave more become to being similar to just profound wave edge, and the just profound wave that composition square wave is superimposed is fewer).
Wherein, at least two first switch tubes 21 alternate conduction and disconnection under the driving of driving signal, passes through at least two
A 21 alternate conduction of first switch tube and disconnection, excitation transmitting coil 40 generates alternating electromagnetic field, to realize the wireless of energy
Transmitting.
Wireless charging receiving device compatible with the wireless charging of embodiment of the present invention transmitting equipment can refer to Fig. 5 institute
Show, the alternating electromagnetic field that wherein transmitting coil 40 generates influences receiving coil 51, and receiving coil 51 produces in alternating magnetic field environment
Raw induced electromotive force, is transmitted in the reception circuit 52 for receiving chip, and switching tube q1, q2, q3 and the q4 received in circuit 52 is negative
AC power in receiving coil 51 is rectified into direct current by duty, using DC to DC DC-DC converter, such as LDO in figure
(Low Dropout regulator, low pressure difference linear voltage regulator) transformation, inputs reliable and stable voltage and fills for mobile terminal
Electricity.
Optionally, as shown in Fig. 2, the second switch circuit 30 include second switch 31 and with the second switch
The capacitor 32 of 31 connections；
When the second switch 31 is in the conductive state, after the first switch tube 21 is in parallel with the capacitor 32
It is connect with the driving circuit 10.
At this point, the grid electricity when second switch 31 is in the conductive state, inside capacitor 32 and first switch tube 21
Holding parallel connection, the driving capacitor equivalent of first switch tube 21 is the sum of two capacitors after parallel connection, i.e. driving capacitor increases, so as to
Reduce the harmonic component that driving signal generates interference signal, reduces interference of the wireless charging to mobile terminal.
Optionally, the grid of the second switch 31 is connect with the driving circuit 10, the second switch 31
Drain electrode is connect with the grid of the first switch tube 21, and the source electrode of the second switch 31 is grounded by capacitor 32.
At this point, when second switch 31 is in the conductive state, realize first switch tube 21 it is in parallel with capacitor 32 after
It is connect with driving circuit 10, so as to reduce the harmonic component that driving signal generates interference signal, reduces wireless charging pair
The interference of mobile terminal.
For example, as shown in Figure 1, first switch circuit 20 includes that 4 first switch tubes, 21,4 first switch tubes 21 are distinguished
Labeled as Q1, Q2, Q3 and Q4, each first switch tube 21 is connected with 30,4 second switch circuits 30 of a second switch circuit
It is respectively labeled as K1, K2, K3 and K4, wherein switching tube Q1 is connect with circuit K1, and switching tube Q2 is connect with circuit K2, switching tube
Q3 is connect with circuit K3, and switching tube Q4 is connect with circuit K4.
The structure of circuit K1, K2, K3 and K4 are as shown in Fig. 2, respectively include a second switch 31 and and second switch
The capacitor 32 that pipe 31 connects.Wherein, the grid of the second switch 31 of circuit K1, K2, K3 and K4 respectively with driving circuit 10
Connection, the drain electrode of the second switch 31 of circuit K1, K2, K3 and K4 are connect with the grid of switching tube Q1, Q2, Q3 and Q4 respectively,
The source electrode of the second switch 31 of circuit K1, K2, K3 and K4 passes through a capacitor 32 respectively and is grounded.
When the second switch 31 of circuit K1, K2, K3 or K4 are in the conductive state, be equivalent in switching tube Q1, Q2, Q3 or
In the driving signal of Q4, it is connected in parallel with a capacitor device 32, this capacitor 32 and the grid capacitance inside switching tube Q1, Q2, Q3 or Q4
Parallel connection, the driving capacitor equivalent of switching tube Q1, Q2, Q3 or Q4 are the sum of two capacitors after parallel connection, i.e. driving capacitor increases, thus
The harmonic component that driving signal generates interference signal can be reduced, reduce interference of the wireless charging to mobile terminal.
Optionally, as shown in Figure 1, switching tube Q1, Q2, Q3 and Q4 form full-bridge.Q1, Q4 are simultaneously turned on, and are simultaneously switched off；
Q2, Q3 are simultaneously turned on, and are simultaneously switched off.The driving signal provided by driving circuit 10 enables to Q1, Q4 and Q2, Q3 alternating
Conducting and disconnection.By alternate conduction and Q1, Q4 and Q2 of disconnection, Q3, transmitting coil 40 can be motivated to generate electromagnetic field, thus
Realize the wireless transmission transmitting of energy.In above-mentioned example, by taking the full-bridge that first switch circuit 20 is made up of 4 metal-oxide-semiconductors as an example
It is illustrated, first switch circuit 20 can also be realized otherwise, such as first switch circuit 20 can also pass through
The modes such as half-bridge are realized, are not illustrated one by one herein.
Optionally, continue as shown in Figure 1, transmitting coil 40 includes wire coil Lp and capacitor Cp.Wire coil Lp is one
Group is connected using litz wire or the metal ring coil of steel pipe coiling, capacitor Cp with wire coil Lp, series connection when reaching work
The requirement of resonance.One end of wire coil Lp is connected to two metal-oxide-semiconductors of Q1 and Q2 in first switch circuit 20 by capacitor Cp
Source electrode and drain electrode between tie point, the other end is connected to the source electrode of two metal-oxide-semiconductors of Q3 and Q4 in first switch circuit 20
Tie point between drain electrode.But not limited to this.
Optionally, as shown in figure 5, receiving coil 51 includes wire coil Ls and capacitor Cs.
Optionally, wireless charging transmitting equipment further includes：
The control unit connecting with the second switch circuit 30, described control unit control the second switch circuit 30
It is turned on or off.
It is turned on or off at this point, second switch circuit 30 can be controlled by control unit, to reduce driving when needed
Signal generates the harmonic component of interference signal, reduces interference of the wireless charging to mobile terminal.
Wherein, control unit can be using individual MCU (Micro Controller Unit, micro-control unit) or collection
At the MCU in driving circuit 10, but not limited to this.
In some embodiments of the invention, a kind of wireless charging transmitting equipment as described in any one of the above embodiments is additionally provided
Control method, referring to shown in Fig. 6, including：
Step 61：When obtaining the first received signal strength when mobile terminal does not carry out wireless charging and carrying out wireless charging
The second received signal strength.
Here, the first received signal strength and mobile terminal when not carrying out wireless charging by obtaining mobile terminal carry out
The second received signal strength when wireless charging, in order to receive signal based on the first received signal strength (being denoted as S1) and second
Intensity (is denoted as S2), causes mobile terminal received signal strength to find and adjust in time when being deteriorated in wireless charging.
Step 62：When second received signal strength is less than first received signal strength, and first reception
When signal strength and the difference of second received signal strength are more than preset threshold, the second switch circuit conducting is controlled.
Here, when the second received signal strength S2 is less than the first received signal strength S1, and the first received signal strength S1
When being more than preset threshold with the difference of the second received signal strength S2, the interference signal for showing that current wireless charging generates is affected
The receiving sensitivity of mobile terminal, and the degree that mobile terminal receptivity reduces has been over allowed band, needs to reduce
Interference then controls the conducting of second switch circuit to guarantee speech quality, to increase the driving capacitor of first switch tube, to reduce
Driving signal generates the harmonic component of interference signal, reduces interference of the wireless charging to mobile terminal, improves wireless charging time shift
The receptivity of dynamic terminal, promotes speech quality.
Wherein, preset threshold can be set according to demand, and any reasonable numerical value can be used in preset threshold.
The control method of the wireless charging transmitting equipment of the embodiment of the present invention, influences in the interference signal that wireless charging generates
When the receiving sensitivity of mobile terminal, by control second switch circuit conducting, the driving capacitor of first switch tube is increased, from
And the harmonic component that driving signal generates interference signal is reduced, interference of the wireless charging to mobile terminal is reduced, is improved
The receptivity of mobile terminal, improves speech quality when wireless charging.
Optionally, after above-mentioned steps 62, further include：
Reacquire second received signal strength.
Here, after the conducting of control second switch circuit, the second received signal strength S2 is reacquired, it is mobile eventually with detection
Whether the receptivity at end is restored to setting state.
When the difference of first received signal strength and second received signal strength of reacquisition is more than default
When threshold value, charging current is reduced.
Here, when the first received signal strength S1 and reacquire the second received signal strength S2 difference still above
When preset threshold, illustrates that the receptivity of mobile terminal is restored to setting state not yet, then reduce charging current, so as to adjust
Wireless charging emits the power of equipment, reduces electromagnetic radiation field energy, to further decrease interference, improves the acceptance of mobile terminal
Can, promote speech quality.
When the difference of first received signal strength and second received signal strength of reacquisition be less than it is pre-
If when threshold value, being charged with current charging current.
Here, when the first received signal strength S1 and reacquire the second received signal strength S2 difference still above
When preset threshold, illustrate that the receptivity of mobile terminal has been restored to setting state, then with current charging current (being denoted as I1)
It charges.
Optionally, after the reduction charging current, further include：
Reacquire second received signal strength.
Here, after reducing charging current, the second received signal strength S2 is reacquired, to detect the reception of mobile terminal
Whether performance is restored to setting state.
When the difference of first received signal strength and second received signal strength of reacquisition is more than default
When threshold value, continue to reduce charging current.
Here, when the first received signal strength S1 and reacquire the second received signal strength S2 difference still above
When preset threshold, illustrate that the receptivity of mobile terminal is restored to setting state not yet, then continues to reduce charging current, thus
The power for adjusting wireless charging transmitting equipment, reducing electromagnetic radiation field energy to further decrease interference improves mobile terminal
Receptivity promotes speech quality.
Optionally, after reducing charging current every time, above-mentioned " the second received signal strength of reacquisition is repeated；When
When the difference of one received signal strength and the second received signal strength reacquired is more than preset threshold, continue to reduce charging electricity
The step of stream ", until the difference of the first received signal strength and the second received signal strength reacquired is no more than default threshold
Value.
Optionally, after above-mentioned steps 61, further include：
When second received signal strength is less than first received signal strength, and first received signal strength
When being less than preset threshold with the difference of second received signal strength, controls the second switch circuit and disconnect, and to work as
Preceding charging current charges.
Here, when the second received signal strength S2 is less than the first received signal strength S1, and the first received signal strength S1
When being less than preset threshold with the difference of the second received signal strength S2, although showing the interference signal that current wireless charging generates
Affect the receiving sensitivity of mobile terminal, but the degree that mobile terminal receptivity reduces is not above allowed band, then with
Current charging current I1 charges.
Optionally, after above-mentioned steps 61, further include：
When second received signal strength is not less than first received signal strength, the second switch electricity is controlled
Road disconnects, and is charged with current charging current.
Here, when the second received signal strength S2 is not less than the first received signal strength S1, show that current wireless charging produces
Raw interference signal does not influence the receiving sensitivity of mobile terminal, then is charged with current charging current I1.
Optionally, the difference of above-mentioned second received signal strength for working as first received signal strength and reacquisition
It is after being charged with current charging current or above-mentioned when second received signal strength when value is less than preset threshold
Less than first received signal strength, and the difference of first received signal strength and second received signal strength is not
It when more than preset threshold, controls the second switch circuit and disconnects, and is after being charged with current charging current or above-mentioned
When second received signal strength is not less than first received signal strength, controls the second switch circuit and disconnects,
And after being charged with current charging current, further include：
When the current charging current not up to default maximum charging current, increase charging current.
Here, if current charging current I1 does not reach default maximum charging current (being denoted as Imax), increase charging current,
To improve charge efficiency.
When the current charging current reaches default maximum charging current, continuation is charged with current charging current.
Here, if current charging current I1 reaches default maximum charging current Imax, continue with current charging current I1 into
Row charging.
Wherein, presetting maximum charging current Imax can be set according to demand, and any reasonable numerical value can be used in Imax.
It will increase electromagnetic radiation field energy due to increasing charging current, wireless charging may be made to add the interference of mobile terminal
Weight, reduces the receiving sensitivity of mobile terminal, optionally, after the increase charging current, further includes：
Reacquire second received signal strength.
Here, after increasing charging current, the second received signal strength S2 is reacquired, in order to based on reacquisition
Second received signal strength S2, wireless charging after increasing charging current cause mobile terminal received signal strength be deteriorated when and
When adjust.
Wherein, reacquire the second received signal strength after, can refer to it is described previously, continue above-mentioned steps 61 after
Process.
When second received signal strength of reacquisition is less than first received signal strength, and described first is connect
When receiving the difference of second received signal strength of signal strength and reacquisition more than preset threshold, control described second is opened
Powered-down road conducting.
Here, when the second received signal strength S2 is less than the first received signal strength S1, and the first received signal strength S1
When being more than preset threshold with the difference of the second received signal strength S2, the interference signal for showing that current wireless charging generates is affected
The receiving sensitivity of mobile terminal, and the degree that mobile terminal receptivity reduces has been over allowed band, then controls the
The conducting of two switching circuits, i.e. return step 62, thus increase the driving capacitor of first switch tube, it is dry to reduce driving signal generation
The harmonic component of signal is disturbed, interference of the wireless charging to mobile terminal is reduced, the acceptance of mobile terminal when improving wireless charging
Can, promote speech quality.
Wherein, after return step 62 controls the conducting of second switch circuit, described previously, continuation above-mentioned steps 62 be can refer to
Process later.
A concrete application process of the control method of the embodiment of the present invention is illustrated below below.
As shown in fig. 7, the control method of the embodiment of the present invention, including：
Step 71：Start.
Step 72：It obtains the first received signal strength S1 when mobile terminal does not carry out wireless charging and carries out wireless charging
When the second received signal strength S2.
Step 73：Judge whether S2 is less than S1, if it is not, step 741 is then jumped to, if so, jumping to step 75.
Step 741：It is charged with current charging current I1.
Step 742：Judge whether I1 is equal to default maximum charging current Imax, if it is not, step 743 is then jumped to, if so,
Then jump to step 78.
Step 743：Increase charging current, later return step 72.
Step 75：Judge whether the difference of S1 and S2 is less than preset threshold, if it is not, step 761 is then jumped to, if so,
Jump to step 771.
Step 761：Control the conducting of second switch circuit.
Step 762：Reacquire the second received signal strength S2.
Step 763：Judge whether the difference of S1 and S2 is less than preset threshold, if it is not, step 764 is then jumped to, if so,
Jump to step 771.
Step 764：Charging current is reduced, jumps to step 765 later.
Step 765：Step 764 is repeated, until the difference of S1 and the S2 of reacquisition are less than preset threshold.
Step 771：It is charged with current charging current I1.
Step 772：Judge whether I1 is equal to default maximum charging current Imax, if it is not, step 773 is then jumped to, if so,
Then jump to step 78.
Step 773：Increase charging current, later return step 75.
Step 78：Continuation is charged with current charging current I1.
Step 79：Terminate.
The control method of the wireless charging transmitting equipment of the embodiment of the present invention, influences in the interference signal that wireless charging generates
When the receiving sensitivity of mobile terminal, by control second switch circuit conducting, the driving capacitor of first switch tube is increased, from
And the harmonic component that driving signal generates interference signal is reduced, interference of the wireless charging to mobile terminal is reduced, is improved
The receptivity of mobile terminal, improves speech quality when wireless charging.
Wherein, the control method of the wireless charging transmitting equipment of the embodiment of the present invention, can be applied to wireless charging transmitting and sets
Standby control unit, but not limited to this.
In embodiments of the present invention, mobile terminal includes but is not limited to mobile phone, tablet computer, laptop, palm electricity
Brain, car-mounted terminal, wearable device and pedometer etc..
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
In the description of invention, it is to be understood that term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness ",
The orientation of instructions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" or
Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In the description of invention, unless otherwise indicated, the meaning of " plurality " is two or two with
On.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (11)
1. a kind of wireless charging emits equipment, which is characterized in that including：
Driving circuit (10), the driving circuit (10) generate the driving signal changed over time；
First switch circuit (20), the first switch circuit (20) include at least two first switch tubes (21), it is described at least
Two first switch tubes (21) alternate conduction and disconnections under the driving of the driving signal；
At least two second switch circuits (30), each second switch circuit (30) are connected to one described first and open
It closes between pipe (21) and the driving circuit (10)；
When the second switch circuit (30) is in an off state, the first switch tube (21) directly with the driving circuit
(10) it connects, the first switch tube (21) has the first driving capacitor；
When the second switch circuit (30) is in the conductive state, the first switch tube (21) passes through the second switch electricity
Road (30) is connect with the driving circuit (10), and the first switch tube (21) has the second driving capacitor；Wherein described first
Capacitor is driven to be less than the second driving capacitor；
Transmitting coil (40), the transmitting coil (40) connect with the first switch circuit (20), the transmitting coil (40)
In at least two first switch tubes (21) alternate conduction and disconnection, electromagnetic field is generated.
2. wireless charging according to claim 1 emits equipment, which is characterized in that the second switch circuit (30) includes
Second switch (31) and the capacitor (32) being connect with the second switch (31)；
When the second switch (31) is in the conductive state, the first switch tube (21) is in parallel with the capacitor (32)
It is connect afterwards with the driving circuit (10).
3. wireless charging according to claim 2 emits equipment, which is characterized in that the grid of the second switch (31)
It is connect with the driving circuit (10), the drain electrode of the second switch (31) and the grid of the first switch tube (21) connect
It connects, the source electrode of the second switch (31) is grounded by capacitor (32).
4. wireless charging according to claim 1 emits equipment, which is characterized in that further include：
The control unit connecting with the second switch circuit (30), described control unit control the second switch circuit (30)
It is turned on or off.
5. a kind of control method of wireless charging transmitting equipment according to any one of claims 1 to 4, which is characterized in that
Including：
The first received signal strength when mobile terminal does not carry out wireless charging and second when carrying out wireless charging is obtained to receive
Signal strength；
When second received signal strength is less than first received signal strength, and first received signal strength and institute
When stating the difference of the second received signal strength more than preset threshold, the second switch circuit conducting is controlled.
6. control method according to claim 5, which is characterized in that it is connected in the control second switch circuit
Afterwards, further include：
Reacquire second received signal strength；
When the difference of first received signal strength and second received signal strength of reacquisition is more than preset threshold
When, reduce charging current；
When the difference of first received signal strength and second received signal strength of reacquisition is less than default threshold
When value, charged with current charging current.
7. control method according to claim 6, which is characterized in that after the reduction charging current, further include：
Reacquire second received signal strength；
When the difference of first received signal strength and second received signal strength of reacquisition is more than preset threshold
When, continue to reduce charging current.
8. control method according to claim 5, which is characterized in that when the acquisition mobile terminal does not carry out wireless charging
The first received signal strength and carry out wireless charging when the second received signal strength after, further include：
When second received signal strength is less than first received signal strength, and first received signal strength and institute
When stating the difference of the second received signal strength and being less than preset threshold, controls the second switch circuit and disconnect, and currently to fill
Electric current charges.
9. control method according to claim 5, which is characterized in that when the acquisition mobile terminal does not carry out wireless charging
The first received signal strength and carry out wireless charging when the second received signal strength after, further include：
When second received signal strength is not less than first received signal strength, it is disconnected to control the second switch circuit
It opens, and is charged with current charging current.
10. according to control method described in claim 6,8 or 9, which is characterized in that described to be charged with current charging current
Later, further include：
When the current charging current not up to default maximum charging current, increase charging current；
When the current charging current reaches default maximum charging current, continuation is charged with current charging current.
11. control method according to claim 10, which is characterized in that after the increase charging current, further include：
Reacquire second received signal strength；
When second received signal strength of reacquisition is less than first received signal strength, and the first reception letter
When number intensity and the difference of second received signal strength of reacquisition are more than preset threshold, the second switch electricity is controlled
Road conducting.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108964789A (en) * | 2018-10-16 | 2018-12-07 | Oppo（重庆）智能科技有限公司 | Radio frequency interference processing method, device, storage medium and electronic equipment |
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