CN109587592A - Bluetooth headset and its on-off control method - Google Patents
Bluetooth headset and its on-off control method Download PDFInfo
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- CN109587592A CN109587592A CN201810629285.3A CN201810629285A CN109587592A CN 109587592 A CN109587592 A CN 109587592A CN 201810629285 A CN201810629285 A CN 201810629285A CN 109587592 A CN109587592 A CN 109587592A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses the bluetooth headsets and its on-off control method of a kind of basis and the connection status automatic switching of charging unit.The bluetooth headset includes governor circuit, charging port and the transistor for detecting charging port and charging unit connection status, the transistor is according to the connection status on or off of charging port and charging unit, change to which the output end level of the transistor generates height, governor circuit controls bluetooth headset booting or shutdown according to the height variation of the height or level of the output end level of the transistor.When bluetooth headset is connect with charging unit, bluetooth headset elder generation automatic shutdown, subsequently into charged state.When bluetooth headset and charging unit disconnect, as long as earphone has electricity, bluetooth headset Auto Power On.The present invention has extremely low power dissipation, high reliablity, the simple beneficial effect low with production cost of circuit.
Description
Technical field
The present invention relates to bluetooth headset and its switching on and shutting down control fields, and in particular to a kind of connection of basis and charging unit
The bluetooth headset and its on-off control method of state automatic switching.
Background technique
Different from traditional earphone, the constraint that family gets rid of earphone cable is can be used in bluetooth headset.Bluetooth headset is usually logical
Connection charger is crossed to charge, when user when outgoing at one's side without attaching plug in the case where, then can not be filled
Electricity, therefore there is charging bluetooth earphone box.When bluetooth headset is placed into charging box, bluetooth headset meeting automatic shutdown,
Charging box starts to charge to it, and when bluetooth headset is removed charging box, charging terminates, and bluetooth headset is opened automatically
Machine.
There are three types of the technology box-like state of discrepancy of bluetooth headset and switching on and shutting down controls for identification at present:
1. Bluetooth chip software identifies.By the charge port on earphone, the charged state of identification earphone is carried out with software.This side
Formula is disadvantageous in that: stand-by power consumption is high；When charging box battery exhausts, earphone also can Auto Power On when entering box；Need core
Piece real-time monitoring voltage, has aggravated the computational load of chip.
2. using Hall switch.Enter the magnet sensed after box on charging box by the Hall element in earphone, using suddenly
You export low and high level by element, to issue instructions to the special switch machine IC pin of Bluetooth chip, realize switching on and shutting down.This mode
It is disadvantageous in that: Gao Chengben；Hall element placement is restricted, and is not suitable for insert earphone structure and is used；External magnetic field is higher
It will cause earphone error cut-off machine；When charging box battery exhausts, earphone enters also can Auto Power On under box-like state.
3. increasing contact pilotage.By respectively increasing a contact pilotage in earphone and charging box, comes whether test earphone enters box, opened
Shutdown control.This mode is disadvantageous in that: occupied space is big, is not suitable for insert earphone and uses；Increase contact pin counts
The undesirable risk of stylus contact is increased simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is that avoiding the deficiency of above-mentioned technical proposal, and proposes one kind and do not increase it
His component, and do not depend on external charging power supply status can be achieved with shutting down out into box box booting bluetooth headset and its switching on and shutting down control
Method processed.
The present invention solves the connection status that technical solution used by the technical problem is a kind of basis and charging unit
The bluetooth headset of automatic switching, including governor circuit and charging port further include that detection charging port is connect with charging unit
The transistor of state, the transistor according to the connection status on or off of charging port and charging unit, from
And the output end level of the transistor generates height and changes, the governor circuit is electric according to the output end of the transistor
The height variation of flat height or level controls bluetooth headset booting or shutdown.
Further, the transistor is field effect transistor.
Further, the transistor is NMOS tube.
It further, further include the bluetooth headset battery powered for bluetooth headset, first resistor and second resistance, the master
Controlling in circuit includes main control chip, and the charging port includes high level input terminal Vin1 and the sub- Vin2 of low-level input；
The high level input terminal Vin1 is electrically connected with the second pin of the main control chip；The sub- Vin2 of low-level input with
One end of first resistor is electrically connected；The other end of the first resistor is electrically connected with the grid of the NMOS tube；The grid of NMOS tube
Pole is also electrically connected with one end of the second resistance；The other end and the bluetooth headset electricity of the drain electrode of NMOS tube and the second resistance
The anode electrical connection in pond；The source electrode of NMOS tube is electrically connected with the first pin of the main control chip；The cathode of bluetooth headset battery
Ground connection.
It further, further include the bluetooth headset battery powered for bluetooth headset, first resistor, second resistance and two poles
It manages, includes main control chip in the governor circuit, the charging port includes high level input terminal Vin1 and low level input
Terminal Vin2；The high level input terminal Vin1 is electrically connected with the second pin of the main control chip；The low level input
Terminal Vin2 is electrically connected with the cathode of one end of first resistor and the diode；The other end of the first resistor with it is described
The grid of NMOS tube is electrically connected；The grid of NMOS tube is also electrically connected with one end of the second resistance；The drain electrode of NMOS tube and institute
State the anode electrical connection of the other end and bluetooth headset battery of second resistance；The first of the source electrode of NMOS tube and the main control chip
Pin electrical connection；The plus earth of the diode；The cathode of bluetooth headset battery is grounded.
It further, further include the bluetooth headset battery powered for bluetooth headset, first resistor, second resistance, third electricity
Resistance and diode, include main control chip in the governor circuit, and the charging port includes high level input terminal Vin1 and low
The sub- Vin2 of level input；The high level input terminal Vin1 passes through the second pin of 3rd resistor and main control chip electricity
Connection；The sub- Vin2 of low-level input is electrically connected with the cathode of one end of first resistor and the diode；Described first
The other end of resistance is electrically connected with the grid of the NMOS tube；The one end of the grid of NMOS tube also with the second resistance is electrically connected
It connects；The drain electrode of NMOS tube is electrically connected with the anode of the other end of the second resistance and bluetooth headset battery；The source electrode of NMOS tube
It is electrically connected with the first pin of the main control chip；The plus earth of the diode；The cathode of bluetooth headset battery is grounded.
Further, the model AB1524_5X5_64L of the main control chip, the first pin of the main control chip are
REGEN/POWER pin, the second pin are VCHG pin.
Further, the signal that the governor circuit is received according to the first pin or the second pin of the main control chip
The height variation control bluetooth headset shutdown of the height or level of level, governor circuit are received according to the first pin of main control chip
To the height variation control bluetooth headset booting of the height or level of signal level.
Further, described in the case that the first pin of main control chip or the second pin all receive useful signal
The height variation of the height or level of the signal level that governor circuit is preferentially received using the second pin of the main control chip
Control bluetooth headset shutdown.
The present invention, which solves technical solution used by the technical problem, can also be a kind of charging bluetooth earphone system, wrap
Include bluetooth headset and charging bluetooth earphone device；The bluetooth headset, including governor circuit, charging port and for detect fill
The transistor of the connection status of electric port and charging unit, the transistor is according to the company of charging port and charging unit
Connect state on or off, thus the transistor output end level generate height change, the governor circuit according to
The height variation of the height or level of the output end level of the transistor controls bluetooth headset booting or shutdown；It is described
Charging port includes high level input terminal Vin1 and the sub- Vin2 of low-level input；The charging unit includes that charging output connects
Mouthful, the charging output interface includes high level output terminal Vout1 and low level output terminal Vout2；When the bluetooth ear
When machine is connect with the charging box, the high level input terminal Vin1 and high level output terminal Vout1 electrical connection；Institute
State the sub- Vin2 of low-level input and low level output terminal Vout2 electrical connection.
The present invention, which solves technical solution used by the technical problem, can also be the company of a kind of basis and charging unit
Connect the bluetooth headset on-off control method of state automatic switching, it is characterised in that: detect bluetooth ear using transistor
The connection status of machine charging port and charging unit, the transistor according to the connection status of charging port and charging unit and
On or off changes so that the output end level of the transistor generates height, in the governor circuit of bluetooth headset
Master control program controls bluetooth headset booting according to the height variation of the output end level height or level of the transistor
Or shutdown.
Further, the transistor uses field effect transistor.
Further, the transistor uses NMOS tube.
Further, when the charging bluetooth earphone port is connect with charging unit, the NMOS tube cut-off, the master
The signal that the connection pin of main control chip and NMOS tube in control circuit receives is low level signal or becomes low from high level
The failing edge trigger signal of level, master control program control bluetooth headset according to the signal and shut down.
Further, when the charging bluetooth earphone port and charging unit disconnect, the NMOS transistor conduction, master control electricity
The signal that the connection pin of main control chip and NMOS tube in road receives is high level signal or becomes high level from low level
Rising edge trigger signal, in the case where bluetooth headset has electricity, master control program according to the signal control bluetooth headset be switched on.
Further, when the charging bluetooth earphone port is connect with charging unit, there is the situation of electricity in charging unit
Under, signal that the pin that the main control chip in the governor circuit is connect with the charging unit receives be high level signal or
Become the rising edge trigger signal of high level from low level, master control program controls bluetooth headset according to the signal and shuts down.
Further, governor circuit is preferentially according to received signal control on the pin connecting on main control chip with charging unit
Bluetooth headset shutdown processed.
Further, the output end level of the transistor carries out anti-jitter signal processing by signal processing unit
It is input to the master control program of governor circuit afterwards.
Further, the output end level of the transistor is input to master control electricity after the delay of signal delay unit
The master control program on road.
Compared with the existing technology compared with, the beneficial effects of the present invention are: 1, without software real-time detection external power supply shape
State, it is only necessary to the switching on and shutting down of bluetooth headset are controlled by the level or level change of part pin, system power dissipation is extremely low, close to
Zero；2, charging unit without electricity in the case where, when bluetooth headset is connected with charging unit still can automatic shutdown, further
Reduce power consumption；3, due to being not necessarily to software real-time detection, it is only necessary to which the level signal of detection part pin, chip operand is small, inspection
It is high to survey accuracy, effectiveness is high, and error probability is low；4, without mechanical key, no increase probe and magnetic part, circuit letter
Single, it is small that circuit occupies structure space；5, production cost is low.
Detailed description of the invention
Fig. 1 is a kind of structural representation of basis and the bluetooth headset of the connection status automatic switching of charging unit of the present invention
Block diagram；
Fig. 2 is the bluetooth headset of one of preferred embodiment of the present invention and the electrical block diagram of charging bluetooth earphone system；
Fig. 3 is one of the electrical block diagram of the charging bluetooth earphone system of one of preferred embodiment of the present invention；
Fig. 4 is the schematic equivalent circuit that bluetooth headset enters after charging box in the preferred embodiment of the present invention；
Fig. 5 is the two of the electrical block diagram of the charging bluetooth earphone system of one of preferred embodiment of the present invention；
Fig. 6 is the schematic equivalent circuit that bluetooth headset goes out after charging box in the preferred embodiment of the present invention；
Fig. 7 is the bluetooth headset on-off control method flow chart of one of preferred embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are further described below in conjunction with each attached drawing.
As shown in Fig. 1, a kind of bluetooth headset master of basis and the connection status automatic switching of charging unit of the present invention
It to be made of four parts: charging port, transistor, governor circuit and bluetooth headset battery.The transistor is used for
The connection status of charging port and charging unit is detected, and is connected or cuts according to the connection status of charging port and charging unit
Only, it generates height so as to cause the output end level of the transistor to change, governor circuit is according to the defeated of the transistor
The height variation of the height or output end level of outlet level controls bluetooth headset booting or shutdown.Specifically, described
Bluetooth headset battery is rechargeable battery.When bluetooth headset is connect with charging unit, governor circuit first controls bluetooth headset shutdown,
Then charging unit just starts to charge the battery；When bluetooth headset and charging unit disconnect, there is the situation of electricity in battery
Under, governor circuit controls bluetooth headset booting.
As shown in Fig. 2, the transistor is specifically NMOS field-effect tube Q1.Bluetooth ear of the present invention
Machine includes NMOS field-effect tube Q1, first resistor R1, second resistance R2,3rd resistor R3, diode Q2, bluetooth headset battery
BAT and charging port.Charging port includes high level input terminal Vin1 and the sub- Vin2 of low-level input.
Successively illustrate three embodiments of the invention below with reference to attached drawing 2:
Embodiment one, including sub- Vin2, NMOS effect of attached high level input terminal Vin1 shown in Fig. 2, low-level input
It should pipe Q1, first resistor R1, second resistance R2, bluetooth headset battery BAT and governor circuit.Governor circuit includes main control chip,
In the present embodiment, the model AB1524_5X5_64L of the main control chip.First pin of main control chip is REGEN/POWER
Pin, the second pin are VCHG pin.
High level input terminal Vin1 is directly connected to the VCHG pin of main control chip, the sub- Vin2 of low-level input and
One end of one resistance R1 is electrically connected.The grid G of the NMOS field-effect tube Q1 other end and second resistance with first resistor R1 simultaneously
One end electric signal of R2 connects, and the drain D of NMOS field-effect tube Q1 is connect with the other end electric signal of second resistance R2, simultaneously also
It is connected to the anode of bluetooth headset battery BAT.The AGND pin of the cathode ground connection and main control chip of battery BAT.NMOS field-effect
The source S output end of pipe Q1 is connected to the REGEN/POWER pin of main control chip.
What embodiment one was realized has the technical effect that, can control bluetooth according to the connection status of bluetooth headset and charging unit
The switching on and shutting down of earphone.When bluetooth headset is connected with charging box, NMOS field-effect tube Q1 ends, and the source S output end of Q1 is defeated
Low level signal or low level failing edge trigger signal is become from high level out, governor circuit controls bluetooth ear according to the signal
Organ's machine；When bluetooth headset and charging box disconnect, NMOS field-effect tube Q1 conducting, the source S output end of Q1 exports high
Level signal or the rising edge trigger signal for becoming high level from low level, in the case where battery BAT has electricity, governor circuit root
According to signal control bluetooth headset booting.
Embodiment two on the basis of example 1, increases diode Q2 as shown in Fig. 2.The cathode of diode Q2
It is electrically connected simultaneously with one end of low-level input sub- Vin2 and first resistor R1, the plus earth and main control chip of diode Q2
AGND pin.
Embodiment two, on the one hand can by increased diode Q2 other than the technical effect of embodiment one may be implemented
To be formed to the charge circuit of bluetooth headset battery, on the other hand, diode Q2 is by first resistor R1, second resistance R2 and NMOS
The AGND pin of field-effect tube Q1 and main control chip is kept apart, and is made mainly by NMOS field-effect tube Q1, first resistor R1 and second
The switching on and shutting down control circuit of resistance R2 composition can independent control bluetooth headset switching on and shutting down, while not influencing charge circuit again
It works normally.
Embodiment three on the basis of example 2, increases 3rd resistor R3 as shown in Fig. 2.High level input terminal
Sub- Vin1 is connected to the VCHG pin of main control chip by 3rd resistor R3.
Embodiment three can also pass through third electricity other than the technical effect of embodiment one and embodiment two may be implemented
Resistance R3 plays the technical effect to entire circuit current-limiting protection.
To the grid G of NMOS field-effect tube Q1, the TP2 Node connectedness in attached drawing 2 arrived for TP1 Node connectedness in attached drawing 2
The source S of NMOS field-effect tube Q1, TP1 node and TP2 node are used to measure in practice the voltage of the point.
Transistor and its peripheral circuit in the present invention include first resistor R1, second resistance R2,3rd resistor R3
It is desirably integrated into bluetooth headset main control chip with diode Q2 etc., to further decrease circuit area.
As shown in Fig. 2, charging bluetooth earphone system of the present invention includes charging bluetooth earphone device and bluetooth ear
Machine.The present invention is applied at present on moving charging electric-type bluetooth headset, and therefore, charging unit is preferably charging box.Corresponding to indigo plant
The charging port of input current is used on tooth earphone, for charging box tool there are two the charging port for exporting electric current, high level to be defeated
Terminal Vout1 and low level output terminal Vout2 out corresponds respectively to the end+5V and GND ground connection in an embodiment of the present invention
End.
By taking embodiment three as an example, attached drawing 3 to attached drawing 6 is used to illustrate that the work of bluetooth headset switching on and shutting down control of the present invention is former
Reason.
As shown in Fig. 3, when bluetooth headset is placed into charging box, the port+5V and GND of charging box respectively with bluetooth ear
The sub- Vin2 docking conducting of the high level input terminal Vin1 and low-level input of machine charging port.RX is that bluetooth headset fills in figure
The equivalent resistance of electric box.
In the case where charging box has electricity, the charging current issued from the end charging box+5V is followed by the high electricity of bluetooth headset
Flat input terminal Vin1,3rd resistor R3, the VCHG pin of main control chip, battery BAT anode, battery BAT cathode, main control chip
AGND pin, diode Q2, finally by the sub- Vin2 of low-level input lead to charging box GND ground terminal constitute bluetooth
The charge circuit of earphone, as shown in closeer dotted line in attached drawing 3.At this point, the VCHG pin of main control chip receives high level signal
Or becoming the rising edge trigger signal of high level from low level, governor circuit controls bluetooth headset according to this signal priority and closes
Machine, subsequent bluetooth headset enter charged state.
No matter whether charging box has electricity, as the high level input terminal Vin1 and low electricity for detecting charging bluetooth earphone port
In the case where having access charging box between flat input terminal Vin2, switching on and shutting down control circuit is opened under the driving of bluetooth headset battery
Beginning work.During controlling shutdown, electric current is defeated followed by second resistance R2, first resistor R1, low level from battery BAT
The AGND pin for entering terminal Vin2, high level input terminal Vin1,3rd resistor R3 to main control chip is formd as in attached drawing 3
Relatively dredge route shown in dotted line.The voltage of wherein R1=1k Ω, R2=180k Ω, R3=2.2 Ω, battery BAT are 3.7V, and electric current is
50mA.The independent shutdown control for realizing bluetooth headset of the route, control principle by attached bluetooth headset shown in Fig. 4 and
The equivalent circuit diagram of charging box is explained.
As shown in Fig. 4, wherein RX is the equivalent resistance of charging box, and RJ is the equivalent resistance of bluetooth headset governor circuit,
BAT is bluetooth headset battery.The voltage V of TP1 nodeTP1It calculates as follows:
VTP1=VQ1_G=VBAT× (R1+RX+RJ)/R2+(R1+RX+RJ) }
In the third embodiment, R1=1k Ω, R2=180k Ω, RX=6.2k Ω, RJ=2k Ω, BAT voltage VBAT=3.7V, so,
VTP1=3.7 × (1+6.2+2)/180+(1+6.2+2) }=0.18V
Since bluetooth headset is in normal operating conditions, NMOS tube Q1 is in the conductive state, therefore,
VQ1_S=VBAT
So
VGS=VQ1_G-VQ1_S<0
NMOS field-effect tube Q1 pipe ends at this time, TP2 node Non voltage output, the REGEN/POWER of bluetooth headset main control chip
The signal that pin receives is low level signal or becomes low level failing edge trigger signal, governor circuit control from high level
Bluetooth headset automatic shutdown.
Illustrate that bluetooth headset enters the logical order of box shutdown control below:
Bluetooth headset can be the state of booting or shutdown before entering box.When bluetooth headset has been off-mode, bluetooth
Earphone is just directly entered the state to charge for bluetooth headset battery after entering box.What the present invention was realized, which has the technical effect that, makes bluetooth
Earphone enters charged state after open state tripping in box automatic shutdown, and Auto Power On after making bluetooth headset go out box.
Bluetooth headset is placed into charging box in the state of booting, and bluetooth headset battery has electricity at this time, blue entering
Need first to control bluetooth headset shutdown before the charging of tooth earphone.
When charging box has electricity, charge circuit shown in closeer dotted line in attached drawing 3 is formd since bluetooth headset enters box, it is main
The VCHG pin of control chip receives high level signal or becomes the rising edge trigger signal of high level from low level.
Since bluetooth headset enters box, it has been formed simultaneously in attached drawing 3 and has relatively dredged route shown in dotted line, due to the access of charging box
NMOS field-effect tube Q1 is caused to end, the source S of NMOS field-effect tube Q1 exports low level signal or become by high level
For the REGEN/POWER pin of low level failing edge trigger signal to main control chip.
Governor circuit can arbitrarily select the signal on VCHG pin or REGEN/POWER pin to carry out shutdown control, only
Will wherein any one pin signal it is effective, that is, can control bluetooth headset shutdown.In the case where charging box has electricity, master control electricity
Road can preferentially select the control bluetooth headset shutdown of VCHG pin signal, at this point, shutdown control can be with main control chip
Signal on REGEN/POWER pin is unrelated.After shutdown, charging box starts to charging bluetooth earphone.
Dual shutdown control circuit of the invention ensures that bluetooth headset enters that box can shut down and whether charging box has electric nothing
It closes, can avoid when charging box is without electricity, bluetooth headset enters no the case where working on of shutting down after box；Also it is avoided that bluetooth ear
There is a situation where open by mistake machine when abruptly starting to charge after machine off-mode tripping in box.
When bluetooth headset is taken out in charging box, as shown in Fig. 5, the high level of charging bluetooth earphone port is defeated
Enter terminal Vin1 and the sub- Vin2 of low-level input to disconnect with+the 5V of charging box and the port GND respectively, at this time due to diode Q2
One-way conduction characteristic, battery BAT be connected can not with the AGND of bluetooth headset main control chip, charge circuit disconnect.In attached drawing 5
Connection relationship breaking between battery BAT, second resistance R2, first resistor R1 and charging box at this time has been marked with dotted line.Accordingly
, at this point, the equivalent circuit diagram of bluetooth headset and charging box is as shown in Fig. 6, wherein RJ be bluetooth headset governor circuit etc.
Resistance is imitated, BAT is bluetooth headset battery, and the X indication circuit in figure disconnects.
Since the internal resistance of NMOS field-effect tube Q1 is very high, the voltage V of TP1 nodeTP1It is approximately equal to the voltage of battery,
VTP1=VQ1_G≈VBAT=3.7V
Since Q1 is the conducting of depletion type NMOS tube, at this time drain D and source S, so,
VQ1_S=VBAT=VTP2
VTP1=VTP2
The voltage V of TP2 nodeTP2Equal to BAT cell voltage, what the REGEN/POWER pin of bluetooth headset main control chip received
Signal is high level signal or the rising edge trigger signal for becoming high level from low level, in the case where bluetooth headset has electricity,
Governor circuit controls bluetooth headset Auto Power On.
It as shown in Fig. 7, is a kind of flow chart of bluetooth headset on-off control method of the present invention.First to letter therein
Number processing unit and signal delay unit are explained:
Discovery is when the level of bluetooth headset main control chip REGEN/POWER pin is by low get higher in actual measurement, it may appear that undershoot
Phenomenon, i.e. high level fluctuate downwards, and duration increases signal delay list within 25ms in software signal processing
Member avoids the invalid signals of front 25ms, to guarantee the stability of booting.In addition, when in Earphone box there are two bluetooth headset,
After one of earphone is fully charged, the output voltage of charging box can change suddenly, form a small-pulse effect signal, having can
Another earphone can be made to open by mistake machine, therefore increase the signal processing unit of stabilization in software signal processing, sentenced
The disconnected pulse less than 5ms is illegal command, to exclude in the case where an earphone is fully charged, another earphone opens by mistake machine
Situation.
Specific bluetooth headset on-off control method is as follows:
Firstly, judging the connection status of charging bluetooth earphone port and charging unit.
When charging bluetooth earphone port is connect with charging unit, i.e., when bluetooth headset is placed into charging box, main control chip root
Bluetooth headset shutdown is controlled according to the signal received on VCHG pin or REGEN/POWER pin.
Specifically, due to the formation of charge circuit, the VCHG pin of main control chip receives in the case where charging box has electricity
Become the rising edge trigger signal of high level, the preferential basis of bluetooth headset master control program to high level signal or from low level
The signal controls bluetooth headset shutdown, unrelated with the signal of main control chip REGEN/POWER pin.Subsequent bluetooth headset, which enters, to be filled
Electricity condition.
When NMOS tube detects that bluetooth headset enters box, NMOS tube cut-off connects on main control chip REGEN/POWER pin at this time
The signal received can there are two types of, one is low level signal, another kind is that high level becomes low level failing edge triggering letter
Number, master control program first carries out anti-jitter signal processing and signal delay process to the signal, further according to treated the signal
Bluetooth headset shutdown is controlled, it is unrelated either with or without electricity with charging box.Subsequent bluetooth headset battery enters charged state.
When charging bluetooth earphone port and charging unit disconnect, i.e., when bluetooth headset is taken out from charging box,
In the case that bluetooth headset has electricity, main control chip controls bluetooth headset according to the signal received on REGEN/POWER pin
Booting.
Specifically, when NMOS tube detects that bluetooth headset has gone out box, NMOS transistor conduction, main control chip REGEN/ at this time
The signal received on POWER pin can there are two types of, one is high level signal, another kind is that low level becomes high level
Rising edge trigger signal, master control program first carries out anti-jitter signal processing and signal delay process to the signal, further according to place
Signal control bluetooth headset booting after reason.
In a particular embodiment, the signal processing of anti-jitter is realized by signal processing unit, and signal delay process is
It is realized by signal delay unit.The signal processing unit and the signal delay unit can be setting in bluetooth master control electricity
Software function module inside road realizes the processing to signal by way of software, is also possible to be arranged in bluetooth governor circuit
External hardware circuit module realizes the processing to signal by way of hardware.
In other specific embodiments, according to the different characteristics of transistor, it can also be when REGEN/POWER is managed
The level signal received on foot is high level or becomes bluetooth headset when the rising edge trigger signal of high level from low level
Automatic shutdown, when the level signal received on REGEN/POWER pin is low level or becomes low level from high level
Bluetooth headset Auto Power On when failing edge trigger signal.
In other specific embodiments, the charging unit of bluetooth headset can be the charging units such as USB charger.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies
Field is included within the scope of the present invention.
Claims (19)
1. the bluetooth headset of a kind of basis and the connection status automatic switching of charging unit, including governor circuit and charging end
Mouthful, it is characterised in that:
It further include the transistor for detecting charging port and charging unit connection status, the transistor is according to charging port
With the connection status on or off of charging unit, change so that the output end level of the transistor generates height, institute
It states governor circuit the bluetooth headset is controlled according to the variation of the height of the height of the output end level of the transistor or level and open
Machine or shutdown.
2. bluetooth headset according to claim 1, it is characterised in that:
The transistor is field effect transistor.
3. bluetooth headset according to claim 1, it is characterised in that:
The transistor is NMOS tube.
4. bluetooth headset according to claim 3, it is characterised in that:
Further include the bluetooth headset battery for bluetooth headset power supply, first resistor and second resistance, includes in the governor circuit
Main control chip, the charging port include that high level input terminal (Vin1) and low-level input are sub (Vin2)；
The high level input terminal (Vin1) is electrically connected with the second pin of the main control chip；Low-level input
(Vin2) it is electrically connected with one end of first resistor；The other end of the first resistor is electrically connected with the grid of the NMOS tube；
The grid of NMOS tube is also electrically connected with one end of the second resistance；The drain electrode of NMOS tube and the other end of the second resistance and
The anode electrical connection of bluetooth headset battery；The source electrode of NMOS tube is electrically connected with the first pin of the main control chip；Bluetooth headset
The cathode of battery is grounded.
5. bluetooth headset according to claim 3, it is characterised in that:
It further include the bluetooth headset battery for bluetooth headset power supply, first resistor, second resistance and diode, the governor circuit
In include main control chip, the charging port include high level input terminal (Vin1) and low-level input son (Vin2)；
The high level input terminal (Vin1) is electrically connected with the second pin of the main control chip；Low-level input
(Vin2) it is electrically connected with the cathode of one end of first resistor and the diode；The other end of the first resistor and the NMOS
The grid of pipe is electrically connected；The grid of NMOS tube is also electrically connected with one end of the second resistance；The drain electrode of NMOS tube and described the
The anode electrical connection of the other end and bluetooth headset battery of two resistance；First pin of the source electrode of NMOS tube and the main control chip
Electrical connection；The plus earth of the diode；The cathode of bluetooth headset battery is grounded.
6. bluetooth headset according to claim 3, it is characterised in that:
It further include the bluetooth headset battery for bluetooth headset power supply, first resistor, second resistance, 3rd resistor and diode, institute
Stating includes main control chip in governor circuit, and the charging port includes high level input terminal (Vin1) and low-level input
(Vin2)；
The high level input terminal (Vin1) is electrically connected by 3rd resistor with the second pin of the main control chip；It is described low
Level input (Vin2) is electrically connected with the cathode of one end of first resistor and the diode；The first resistor it is another
End is electrically connected with the grid of the NMOS tube；The grid of NMOS tube is also electrically connected with one end of the second resistance；NMOS tube
It drains and is electrically connected with the anode of the other end of the second resistance and bluetooth headset battery；The source electrode of NMOS tube and the master control core
First pin of piece is electrically connected；The plus earth of the diode；The cathode of bluetooth headset battery is grounded.
7. the bluetooth headset according to any one of claim 4 to 6, it is characterised in that:
The model AB1524_5X5_64L of the main control chip, the first pin of the main control chip are REGEN/POWER pipe
Foot, the second pin are VCHG pin.
8. the bluetooth headset according to any one of claim 4 to 6, it is characterised in that:
The height for the signal level that the governor circuit is received according to the first pin and/or the second pin of the main control chip
Or the height variation control bluetooth headset shutdown of level, governor circuit receive signal level according to the first pin of main control chip
Height or level height variation control bluetooth headset booting.
9. bluetooth headset according to claim 8, it is characterised in that:
In the case that the first pin of main control chip and the second pin all receive useful signal, the governor circuit is preferentially adopted
The height of the signal level received with the second pin of the main control chip or the height variation control bluetooth headset of level close
Machine.
10. a kind of charging bluetooth earphone system, it is characterised in that:
Including bluetooth headset and charging bluetooth earphone device；The bluetooth headset, including governor circuit, charging port and be used for
The transistor of the connection status of charging port and charging unit is detected, which fills according to charging port and charging
The connection status on or off set changes so that the output end level of the transistor generates height, the master control electricity
Road controls bluetooth headset booting according to the height variation of the height or level of the output end level of the transistor or closes
Machine；
The charging port includes that high level input terminal (Vin1) and low-level input are sub (Vin2)；
The charging unit include charging output interface, the charging output interface include high level output terminal (Vout1) and
Low level output terminal (Vout2)；
When the bluetooth headset is connect with the charging box, the high level input terminal (Vin1) and the high level output
Terminal (Vout1) electrical connection；The low-level input sub (Vin2) and the low level output terminal (Vout2) electrical connection.
11. the bluetooth headset on-off control method of a kind of basis and the connection status automatic switching of charging unit, feature
It is:
Using the connection status of transistor detection charging bluetooth earphone port and charging unit, the transistor is according to filling
The connection status of electric port and charging unit and on or off, so that the output end level of the transistor generates height
Variation, master control program in the governor circuit of bluetooth headset is according to the output end level height of the transistor or level
Height variation controls bluetooth headset booting or shutdown.
12. bluetooth headset on-off control method according to claim 11, it is characterised in that:
The transistor uses field effect transistor.
13. bluetooth headset on-off control method according to claim 11, it is characterised in that:
The transistor uses NMOS tube.
14. bluetooth headset on-off control method according to claim 13, it is characterised in that:
When the charging bluetooth earphone port is connect with charging unit, the NMOS tube is ended, the master in the governor circuit
The signal that control chip and the connection pin of NMOS tube receive is low level signal or becomes low level failing edge from high level
Trigger signal, master control program control bluetooth headset according to the signal and shut down.
15. bluetooth headset on-off control method according to claim 13, it is characterised in that:
When the charging bluetooth earphone port and charging unit disconnect, the NMOS transistor conduction, the master control core in governor circuit
The signal that piece and the connection pin of NMOS tube receive is high level signal or becomes the rising edge triggering of high level from low level
Signal, in the case where bluetooth headset has electricity, master control program controls bluetooth headset according to the signal and is switched on.
16. bluetooth headset on-off control method according to claim 14, it is characterised in that:
When the charging bluetooth earphone port is connect with charging unit, in the case where charging unit has electricity, the master control electricity
The signal that the pin that main control chip in road is connect with the charging unit receives is high level signal or is become from low level
The rising edge trigger signal of high level, master control program control bluetooth headset according to the signal and shut down.
17. bluetooth headset on-off control method according to claim 16, it is characterised in that:
Governor circuit is preferentially closed according to received signal control bluetooth headset on the pin connecting on main control chip with charging unit
Machine.
18. bluetooth headset on-off control method according to claim 11, it is characterised in that:
The output end level of the transistor is input to master control after signal processing unit carries out anti-jitter signal processing
The master control program of circuit.
19. bluetooth headset on-off control method according to claim 11, it is characterised in that:
The output end level of the transistor is input to the master control processing procedure of governor circuit after the delay of signal delay unit
Sequence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629285.3A CN109587592A (en) | 2018-06-19 | 2018-06-19 | Bluetooth headset and its on-off control method |
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| CN201810629285.3A CN109587592A (en) | 2018-06-19 | 2018-06-19 | Bluetooth headset and its on-off control method |
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| CN110677767A (en) * | 2019-10-31 | 2020-01-10 | 歌尔科技有限公司 | Wireless headset control method and system and TWS headset |
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| CN111800709A (en) * | 2019-07-18 | 2020-10-20 | 深圳市豪恩声学股份有限公司 | Automatic power on/off circuit and bluetooth headset |
| CN112865224A (en) * | 2021-01-07 | 2021-05-28 | 深圳市博陆科电子科技有限公司 | Bluetooth headset low-power-consumption standby method, electronic equipment, medium and charging system |
| CN113347520A (en) * | 2020-03-02 | 2021-09-03 | Oppo广东移动通信有限公司 | Bidirectional communication circuit |
| CN114336899A (en) * | 2022-03-08 | 2022-04-12 | 深圳市思远半导体有限公司 | Earphone recognition and charging circuit and method for charging bin |
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