CN104954935B - Audio device and its control method - Google Patents
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- CN104954935B CN104954935B CN201410115014.8A CN201410115014A CN104954935B CN 104954935 B CN104954935 B CN 104954935B CN 201410115014 A CN201410115014 A CN 201410115014A CN 104954935 B CN104954935 B CN 104954935B
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Abstract
The invention discloses a kind of audio devices and its control method of tool temperature control capability, which includes a digital/analog converter, an amplifier, a loudspeaker, a Power Management Unit and a temperature detecting unit.Digital/analog converter receives a digit news signal, and digit news signal is converted to a simulating music signal signal.Amplifier couples digital/analog converter, amplifies the simulating music signal signal to simulate audio signals after generating an amplification.Loudspeaker couple amplifier, to simulate audio signals after playing the amplification.Power Management Unit gives the amplifier to provide one first operating voltage, and provides one second operating voltage and the digital/analog converter, temperature detecting unit is given to couple the loudspeaker, and a temperature detection signal is generated according to the temperature of loudspeaker.Wherein, Power Management Unit adjusts the first operating voltage and/or the second operating voltage according to the temperature detection signal.The present invention can reach the effect of power saving is with protection loudspeaker.
Description
Technical field
The present invention relates to a kind of audio devices；More particularly to a kind of audio device and its controlling party of tool temperature control capability
Method.
Background technology
Fig. 1 is the schematic diagram of known audio device 100.Audio device 100 includes a gain controller 101, a loudspeaker
102, a temperature detector 103, a digital/analog converter 104 and an amplifier 105.Gain controller 101 receives sound
Signal Dau is interrogated, audio signals Gau after a gain is generated after gain, and by the conversion of digital/analog converter 104 to number
After signal, played out by the output of amplifier 105 to loudspeaker 102.Temperature detector 103 detects the temperature of loudspeaker 102, generates a temperature
Degree detection signal Td.If the temperature of loudspeaker 102 is more than a preset temperature, gain controller 101 is according to Td pairs of temperature detection signal
The audio signals Dau of input carries out attenuation processing, reduces by 102 broadcast sound volume of loudspeaker, reduces the power and operation temperature of loudspeaker 102
Degree, to reach the effect of protection loudspeaker 102 cross cause thermal damage.
It is well known, however, that the processing mode of audio device 100 is that audio signals Dau decays, the work of loudspeaker 102 is electric at this time
Pressure still maintains fixed size, such mode for reducing signal source that the power supply of loudspeaker 102 will be caused to waste.Furthermore known sound
The temperature detection control mode for interrogating device 100, is only adjusted above and below a preset temperature, the accuracy of control still needs to improve.
Invention content
In view of the above-mentioned problems, the first purpose of the embodiment of the present invention is after the information for detecting loudspeaker temperature, according to each
The temperature model (thermal model) of loudspeaker, provides protection mechanism appropriate.
In view of the above-mentioned problems, the first purpose of the embodiment of the present invention is providing a kind of not only power saving but also can protect the devices of loudspeaker
With method.
One embodiment of the invention provides a kind of audio device of tool temperature control capability, including a digital-to-analog turns
Change unit, an amplifier, a loudspeaker, a Power Management Unit and a temperature detecting unit.Digital/analog converter connects
A digit news signal is received, digit news signal is converted into a simulating music signal signal.It is single that amplifier couples digital-to-analog conversion
Member, amplification simulating music signal signal is to simulate audio signals after generating an amplification.Loudspeaker couple amplifier, to play amplification rear mold
Quasi- audio signals.Power Management Unit to provide one first operating voltage to amplifier, and provide one second operating voltage to
Digital/analog converter.And temperature detecting unit, loudspeaker are coupled, a temperature detection signal is generated according to the temperature of loudspeaker.Its
In, Power Management Unit adjusts the first operating voltage and/or the second operating voltage according to temperature detection signal.
Another embodiment of the present invention provides a kind of control method of audio device, includes the following steps：First, according to
According to the characteristic of a loudspeaker, the maximum temperature critical value and a minimum temperature critical value of loudspeaker are set.Detect the temperature of loudspeaker.When
Loudspeaker temperature be more than maximum temperature critical value when, into one overheat section operation, downgrade amplifier one first operating voltage and/
Or one second operating voltage of digital/analog converter；When loudspeaker temperature is less than lowest critical value, into a release section behaviour
Make section, discharges the first operating voltage and/or the second operating voltage, it is critical higher than minimum temperature to allow the temperature of loudspeaker to be restored to
Value.
Another embodiment of the present invention provides a kind of control method of audio device, includes the following steps：First, according to
According to the characteristic of a loudspeaker, the corresponding multiple temperature-controlled area sections of setting loudspeaker are preset wherein each temperature-controlled area section corresponds to one
Operating voltage method of adjustment.Detect the temperature of loudspeaker.Judge temperature falls into which temperature-controlled area of multiple temperature-controlled area sections
Section.One first work of the amplifier of the default operating voltage method of adjustment adjustment supply loudspeaker coupling according to temperature-controlled area section
One second operating voltage of voltage and/or digital/analog converter.
The audio device and its control method of the tool temperature control capability of the embodiment of the present invention, can detect loudspeaker temperature
Afterwards, the first and/or second operating voltage generated to power supervisor is adjusted.Rather than message input signal is increased
Subtract, amount capable of reducing power consumption improves the accuracy of control.
Description of the drawings
Fig. 1 shows the schematic diagram of audio device known in one.
Fig. 2A shows the schematic diagram of the audio device of the tool temperature control capability of one embodiment of the invention.
Fig. 2 B show the schematic diagram of the audio device of the tool temperature control capability of another embodiment of the present invention.
Fig. 3 A show the schematic diagram of the audio device of the tool temperature control capability of another embodiment of the present invention.
Fig. 3 B show the schematic diagram of the Power Management Unit of one embodiment of the invention.
Fig. 4 A show the running oscillogram of the audio device of the tool temperature control capability of known technology.
Fig. 4 B show a running oscillogram of the audio device of the tool temperature control capability of one embodiment of the invention.
Fig. 5 A show the flow chart of the control method of the audio device of one embodiment of the invention.
Fig. 5 B show the controlling mechanism of cooperation Fig. 5 A of the audio device of the tool temperature control capability of one embodiment of the invention
The schematic diagram of running.
Wherein, the reference numerals are as follows：
100,200 audio device
101 gain controllers
201,201a, 201b, 301a, 301b Power Management Unit
102,202,302 loudspeaker
105,203,303 amplifier
103,205,305 temperature detector
306 power control units
104,204,304 analog/digital conversion unit
301 message processing units
307 interpolation filtering circuits
307a higher frequency units
307b modulation units
Com comparators
S0, S1, S2, S3 are switched
R1, R2 resistance
Specific implementation mode
Fig. 2A is the schematic diagram of the audio device 200a of the tool temperature control capability of one embodiment of the invention.Audio device
200a includes Power Management Unit (Power Manager) 201, loudspeaker 202, amplifier 203, digital/analog converter
204 and temperature detecting unit 205.
Digital/analog converter 204 receives a digit news signal Dau, and digit news signal Dau is converted to a mould
Quasi- audio signals Aau.
Amplifier 203 couples digital/analog converter 204, simulating music signal signal Aau is received, by simulating music signal signal
Aau amplifies, and with simulation audio signals AAau after one amplification of generation and exports to loudspeaker 202.
Loudspeaker 202 couple the amplifier 203, to play the message of simulation audio signals AAau after amplification.
Temperature detecting unit 205 couples loudspeaker 202, detects the temperature of loudspeaker 202, and according to the temperature of loudspeaker 202, with
Generate a temperature detection signal Td.In one embodiment, temperature detecting unit 205 detects the temperature of a resistance in loudspeaker 202.When
So, if the design method change of loudspeaker 202, temperature detecting unit 205 also can respective design be other yuan of detection loudspeaker 202 inside
The temperature of 202 inner space of part or loudspeaker.
Power Management Unit 201 couples a power vd D, to provide the work electricity of the first operating voltage Vdd_amp and second
It presses Vdd_dac respectively to amplifier 203 and digital/analog converter 204, and is put according to temperature detection signal Tdd adjustment supplies
First operating voltage Vdd_amp's of big device 203 and/or the second operating voltage Vdd_dac of digital/analog converter 204 is big
It is small.Such as turn down the first, second operating voltage Vdd_amp, Vdd_ of supply digital/analog converter 204 and/or amplifier 20
Dac sizes to reduce the volume of loudspeaker 202, and then reduce the temperature of loudspeaker 202.
Thereby, the first work that the audio device 200a of the present embodiment can utilize adjustment amplifier 203 to supply loudspeaker 202 is electric
The the second operating voltage Vdd_dac for pressing size Vdd_amp and/or digital/analog converter 204, to reduce the temperature of loudspeaker 202
Degree reaches the effect of protecting loudspeaker 202.
When temperature change reaches preset condition, audio device 200a can adjust simultaneously, timesharing or adjustment one of them
First operating voltage Vdd_amp and the second operating voltage Vdd_dac, and the first operating voltage Vdd_amp and the second operating voltage
The size of Vdd_dac can arbitrarily be adjusted according to demand, such as make the equal in magnitude or unequal of the two.Fig. 2 B display present invention is another
The schematic diagram of the audio device 200b of the tool temperature control capability of one embodiment.Audio device 200b includes one first power supply pipe
It is single to manage unit 201a, a second source administrative unit 201b, a loudspeaker 202, an amplifier 203 and digital-to-analog conversion
Member 204.
Audio device 200b and the difference of audio device 200a are that audio device 200b includes that there are two power management lists
First 201a and 201b.Wherein, the first Power Management Unit 201a couples a power vd D, according to the temperature change of loudspeaker 202, adjusts
The size of first operating voltage size Vdd_amp of whole first Power Management Unit 201a supplies amplifier 20.Such as according to one
The first voltage of reaction 202 temperature change of loudspeaker controls signal Vdd_amp_ctr to reduce the first operating voltage Vdd_amp；And
Second source administrative unit 201b also couples power vd D, and according to the temperature change of loudspeaker 202, adjustment is supplied to digital-to-analog to turn
Second operating voltage Vdd_dac of parallel operation 204.Such as the second voltage according to reaction 202 temperature change of loudspeaker controls signal
Vdd_dac_ctr downgrades the second operating voltage Vdd_dac of supply digital/analog converter 204, to reduce loudspeaker 202
Temperature.
Fig. 3 A show the schematic diagram of the audio device 300 of the tool temperature control capability of another embodiment of the present invention.Message fills
It includes a message processing unit (Audio processing unit) 301, one interpolation filtering circuit to set 300
(Interpolation filter) 307, one first Power Management Unit 301a, a second source administrative unit 301b, a loudspeaker
302, one amplifier 303, a digital/analog converter 304, a temperature detecting unit 305, a power control unit 306.
Wherein, interpolation filtering circuit 307 includes a higher frequency unit 307a, a modulation unit 307b.
One embodiment of message processing unit 301 can be a balanced device (Equalizer, EQ) or auto level control electricity
Road (Automatic Level Control, ALC).In the present embodiment, message processing unit 301 includes gain control
Device (not shown), the input audio signals to be received to message processing unit 301 carry out gain process, and yield value is
One current gain value.Gain controller is only an embodiment, and the invention is not limited thereto.
Higher frequency unit 307 is adjusting audio signals frequency.Then, audio signals via modulation unit 307b modulations to pre-
If after frequency band, output digit news signal Dau to digital/analog converter 304.
Thereafter, digit news signal Dau is provided to digital/analog converter 304, amplifier 303, loudspeaker 302,
One, second source administrative unit 301a, 301b and audio device 200b processing, the function mode and aforementioned operation of each element
It is identical, it repeats no more.The audio device 300 of the present embodiment detects loudspeaker 302 when running, using temperature detecting unit 305
Temperature generates temperature detection signal Tdd to power control unit 306.Power control unit 306 is according to temperature detection signal Tdd
The first voltage control signal Vdd_amp_ctr and a second voltage for generating reflection 302 temperature change of loudspeaker control signal
Vdd_dac_ctr.Then, the first Power Management Unit 301a is carried according to first voltage control signal Vdd_amp_ctr to adjust
Supply the first operating voltage Vdd_amp of amplifier 303；Second source administrative unit 301b also controls signal according to second voltage
Vdd_dac_ctr adjusts the second operating voltage Vdd_dac for being supplied to digital/analog converter 304.
Fig. 3 B are the schematic diagram of one embodiment of Power Management Unit proposed by the present invention.In the present embodiment, power management
Unit includes a comparator Com, multiple switch S0, S1, S2, S3, resistance R1 and R2.Power Management Unit couples power supply electricity
VDD is pressed, output voltage Vo is generated after being multiplied by a ratio.Output voltage Vo be first voltage control signal vdd_amp_crt or
Second voltage controls signal vdd_dac_crt, and changes the ratio of resistance R1 and R2 using the keying of switch S0, S1, S2, S3
Value, output voltage
In this way, Power Management Unit can suitably adjust the voltage swing of supply amplifier or digital/analog converter.
It should be noted that the Power Management Unit of the embodiment of the present invention is without being limited thereto, can be that other elements are constituted or component number can also
It is arbitrarily devised.For example, the not limited to of switch is in four, resistance can be implemented by various transistors or other elements.
Fig. 4 A show the running oscillogram of the audio device 100 of known technology, please refer to Fig. 1.And Fig. 4 B displays are originally
The running oscillogram for inventing 300 1 embodiment of audio device proposed, please refer to Fig. 3 A.As shown in Figure 4 A, known message
The control mode of device 100 is that signal controls (signal control).When 102 temperature of loudspeaker is normal, it is assumed that digital-to-analog
The input signal that converter 104 is received with amplifier 105 is all in the full scale of operating voltage (full scale), respectively Vdd_
dac=1.8V,Vdd_amp=5V.And when 102 temperature overheating of loudspeaker, temperature detector 103 is notified that gain controller 101
Input signal size is reduced, such as reducing gain 3 decibels (dB) makes the input signal in digital/analog converter 104 be less than
1.8V, while the input signal in amplifier 105 being made to be less than 5V, and 102 temperature of loudspeaker is allowed to decline, and then reach protection loudspeaker
102 effect.Please note that at this point, the operating voltage of known technology loudspeaker 102 and digital/analog converter 104 still be 1.8V, put
The operating voltage of big device 105 is still 5V.
And in figure 4b, when 302 temperature of loudspeaker is normal, it is assumed that digital/analog converter 304 is received with amplifier 303
Input signal all in the full scale (full scale) of the second, first operating voltage, respectively Vdd_dac=1.8V, Vdd_
amp=5V.When loudspeaker temperature overheating, temperature detecting unit 305 generates a temperature detection signal Tdd and notifies power control unit
306, first voltage control signal Vdd_amp_ctr and/or second voltage control signal Vdd_dac_ctr are generated to the first power supply
Administrative unit 301a and/or second source administrative unit 301b.First Power Management Unit 301a and/or second source management are single
First 301b is downgraded according to first voltage control signal Vdd_amp_ctr and/or second voltage control signal Vdd_dac_ctr respectively
Supply the first operating voltage Vdd_amp of amplifier 303 and/or the second operating voltage Vdd_ of digital/analog converter 304
Dac, such as 3 decibels (dB) are downgraded, so that the second operating voltage Vdd_dac of digital/analog converter 304 is down to by 1.8V
First operating voltage Vdd_amp of 1.3V and/or amplifier 303 is down to 3.6V by 5V.Thus, reducing loudspeaker 302
Volume so that while loudspeaker 302 are protected, also achieve the effect that power saving.It may be noted that above-mentioned number is merely illustrative, this hair
It is bright without being limited thereto, it can be arbitrarily devised on demand.
Furthermore in one embodiment of the invention when loudspeaker when the temperature is excessively high, be supplied to the voltage of digital/analog converter can be through
It is downgraded by low dropout voltage regulator (Low Dropout Regulator, LDO), and under the output signal stool and urine of sound can follow
Drop, reaching reduces volume while reducing power consumption, and reaches the effect of loudspeaker cool down.In addition, not cut to output signal
Under conditions of head (clipping), also the voltage for supplying amplifier is downgraded, can achieve the effect that power saving.The embodiment of the present invention
Horn control device an embodiment, under the mode for not reducing input signal size, downgrade amplifier first work electricity
Second operating voltage of pressure and/or digital/analog converter, the effect of may achieve loudspeaker temperature protection and power saving
Fig. 5 A are the flow chart of one embodiment of audio device control method of the present invention.Fig. 5 B are the message according to the present invention
One embodiment of device coordinates the schematic diagram that the temperature control mechanism of Fig. 5 A operates.In the embodiment of Fig. 5 B, the temperature of audio device
Degree controlling mechanism is divided into four operation sections, including secure section, overheat section, decaying section and release section.
Audio device control method includes the following steps：
Step S502：Start.
Step S504：First, according to horn characteristic, set loudspeaker can bearing temperature range.Audio device is for difference
Horn characteristic, the maximum temperature critical value (thermal threshold) for setting the loudspeaker of its coupling are critical with a minimum temperature
Value, in the embodiment of Fig. 5 B, maximum temperature critical value is set to 110 degree, and minimum temperature critical value is then 100 degree.It is following
Illustrate to indicate highest, minimum temperature critical value respectively with upper and lower limit.Relatively, the Power Management Unit in the audio device
The first, second operating voltage Vdd_amp, Vdd_dac provided also has a range intervals, and bound is in figure 5B with most
Big voltage is indicated with minimum voltage.
Step S506：Detect loudspeaker temperature.
Step S508：Judge whether temperature is less than 110 degree of the upper limit, if entering step S512；If it is not, entering step
S510。
Step S510：When temperature detecting unit detects that loudspeaker temperature is higher than the upper limit, judge to enter overheat section
(overdrive).The mechanism of decaying (attack) voltage can be triggered at this time, and Power Management Unit downgrades the first of supply amplifier
The second operating voltage Vdd_dac of operating voltage Vdd_amp and/or digital/analog converter, make the output volume of loudspeaker drop
It is low, so that loudspeaker temperature is begun to decline, it is section of decaying that this temperature, which declines section,.
Step S512：Judge whether temperature is higher than 100 degree of lower limit, if entering step S516；S514 is entered step if not.
Step S514：When temperature detecting unit detects that loudspeaker temperature is less than lower limit, indicates that current operation must enter and release
Section is put, in other words, the first operating voltage Vdd_amp and/or the second operating voltage Vdd_dac at this time is too low, causes loudspeaker
Fail to maintain operating temperature appropriate, it is therefore necessary to discharge the first operating voltage Vdd_amp and/or the second operating voltage
Vdd_dac, by raising.In short, in discharging section, Power Management Unit promoted the second operating voltage Vdd_dac and/or
First operating voltage Vdd_amp voltages, until returning in secure section, reach maximum message output to allow loudspeaker temperature to increase.
Step S516：The temperature of loudspeaker is judged between bound, and temperature control mechanism is maintained at secure section
(safe)。
Step S518：Terminate.
It is noted that though the present embodiment is to show with four operation sections, it is not limited thereto, this above-mentioned four sections
Sequence can be adjusted according to system requirements, each bound temperature, which is not limited to above-mentioned example, to be adjusted according to demand, and each
Bound temperature is mainly related with the horn characteristic that the audio device is coupled, and is also not limited to four sections, can be set according to demand
Determine to be divided into more or less a control zone.
In this way, the audio device of tool temperature control capability proposed by the present invention can utilize adjustment digital-to-analog to convert
The operating voltage size of device and amplifier supply loudspeaker, rather than only message input signal work is increased and decreased, you can reduce loudspeaker temperature
Come the effect of reducing the temperature of loudspeaker, and further reduce the consumption of voltage, reach power saving and protection loudspeaker.
In conclusion although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.This hair
Bright the technical staff in the technical field, in the spirit and scope for not departing from the utility model, when various changes and profit can be made
Decorations.Therefore, protection scope of the present invention is when subject to the attached claims institute defender.
Claims (10)
1. a kind of audio device, which is characterized in that include：
One digital/analog converter receives a digit news signal, which is converted to simulating music signal letter
Number；
One amplifier couples the digital/analog converter, amplifies the simulating music signal signal to generate simulating music signal after an amplification
Signal；
One loudspeaker couple the amplifier, to simulate audio signals after playing the amplification；
One Power Management Unit gives the amplifier to provide one first operating voltage, and provides one second operating voltage to this
Digital/analog converter；And
One temperature detecting unit couples the loudspeaker, and a temperature detection signal is generated according to the temperature of the loudspeaker；
Wherein, which adjusts first operating voltage and/or the second work electricity according to the temperature detection signal
Pressure；And
The loudspeaker are equipped with a minimum temperature critical value and a maximum temperature critical value.
2. audio device as described in claim 1, which is characterized in that the temperature detecting unit detects a resistance in the loudspeaker
Temperature, to generate the temperature detection signal.
3. audio device as claimed in claim 2, which is characterized in that also include a power control unit, examined according to the temperature
It surveys signal and generates first voltage control signal and second voltage control signal.
4. audio device as claimed in claim 3, which is characterized in that the Power Management Unit includes：
One first Power Management Unit couples a power supply, and control signal according to the first voltage supplies the amplifier to downgrade
The first operating voltage size, to reduce the volume and temperature of the loudspeaker；And
One second source administrative unit, couples the power supply, and supply digital-to-analog conversion is downgraded according to second voltage control signal
The second operating voltage size of device, to reduce the volume and temperature of the loudspeaker.
5. audio device as described in claim 1, which is characterized in that coupling one receives signal circuit, the reception signal circuit
Include：
One message processing unit includes a gain controller, which receives the digit news signal, the gain
Controller carries out gain process to the digit news signal, and the wherein yield value is a current gain value；
One higher frequency unit, to adjust the frequency of the digit news signal；And
One modulation unit is converted single to modulation digit news signal a to pre-set frequency band with output to the digital-to-analog
Member.
6. audio device as described in claim 1, wherein the Power Management Unit include a comparator, multiple switch, with
And first resistor and a second resistance, the Power Management Unit couple a supply voltage, which are multiplied by a ratio
After generate an output voltage, the wherein output voltage is that the first voltage controls signal or the second voltage and controls signal, and should
Power Management Unit changes the ratio of the first resistor and the second resistance using the keying of multiple switch.
7. audio device as described in claim 1, wherein when the temperature detecting unit detects that the temperature of the loudspeaker is more than to be somebody's turn to do
When maximum temperature critical value, which triggers an evanescent voltage mechanism, downgrade first operating voltage and/or this
Two operating voltages.
8. audio device as described in claim 1, the wherein temperature detecting unit detect the temperature of the loudspeaker most less than this
When low temperature critical value, which triggers a release voltage mechanism, promoting or transferring height first operating voltage and/or this
Two operating voltages.
9. a kind of control method of audio device, which includes an amplifier and a digital/analog converter, the control
Method processed includes：
According to the characteristic of a loudspeaker, the maximum temperature critical value and a minimum temperature critical value of the loudspeaker are set；
Detect the temperature of the loudspeaker；
When the loudspeaker temperature is more than the maximum temperature critical value, into an overheat section operation, the one the of the amplifier is downgraded
One second operating voltage of one operating voltage and/or the digital/analog converter；
When the loudspeaker temperature is less than the lowest critical value, section is operated into a release section, discharges first operating voltage
And/or second operating voltage, to allow the temperature of the loudspeaker to be restored to higher than the minimum temperature critical value.
10. method as claimed in claim 9, wherein when the temperature is between highest critical value and the lowest critical value,
The audio device maintains operation in a secure section.
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| CN106125880A (en) * | 2016-06-14 | 2016-11-16 | 乐视控股（北京）有限公司 | The method for controlling volume of a kind of intelligent terminal and device and storage medium |
| CN106792413A (en) * | 2016-11-15 | 2017-05-31 | 四川长虹电器股份有限公司 | Verify the experimental system and method for loudspeaker reliability |
| CN110768632B (en) * | 2018-07-27 | 2023-03-24 | 瑞昱半导体股份有限公司 | Adaptive temperature audio amplifier device and control method thereof |
| CN110113694B (en) * | 2019-04-30 | 2021-07-20 | 广州三星通信技术研究有限公司 | Method and apparatus for controlling audio playback in an electronic device |
| CN111988706B (en) * | 2019-05-23 | 2022-03-15 | 瑞昱半导体股份有限公司 | Audio playing device and method |
| CN112752197A (en) * | 2019-10-30 | 2021-05-04 | 北京小米移动软件有限公司 | Information processing method and device, terminal device and storage medium |
| CN113810826B (en) * | 2020-06-12 | 2024-07-30 | 上海艾为电子技术股份有限公司 | Multi-threshold temperature protection circuit, method, protection device and electronic equipment |
| CN112468633B (en) * | 2020-11-30 | 2023-03-24 | 维沃移动通信有限公司 | Loudspeaker adjusting method and device and electronic equipment |
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