CN113271371A - Mobile terminal - Google Patents
Mobile terminal Download PDFInfo
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- CN113271371A CN113271371A CN202110797957.3A CN202110797957A CN113271371A CN 113271371 A CN113271371 A CN 113271371A CN 202110797957 A CN202110797957 A CN 202110797957A CN 113271371 A CN113271371 A CN 113271371A
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- microphone
- level signal
- mobile terminal
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- power supply
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/68—Circuit arrangements for preventing eavesdropping
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- Telephone Function (AREA)
Abstract
The application provides a mobile terminal, including the microphone, control chip and detection circuitry, detection circuitry's first input end is connected with the microphone, acquires the power signal who inputs to the microphone, detection circuitry's second input end is connected with control chip, control chip is used for according to the current operating condition of mobile terminal, output corresponding level signal to second input, detection circuitry is used for according to the level signal of control chip output and the power signal of microphone, carry out logical operation, obtain target level signal. In the technical scheme, the mobile terminal can be determined to be in a standby state or a non-standby state currently by acquiring the level signal output by the control chip, and then the current microphone is determined to be working or out of work according to the power signal input to the microphone, so that whether the microphone of the mobile terminal is abnormally called or not can be actively detected, the user can know whether the eavesdropping risk exists or not in time, and the eavesdropping prevention effect is improved.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a mobile terminal.
Background
With the development of communication technology, smart phones are widely used as a multifunctional communication tool, in daily life, when a user installs application programs to the smart phones, the user often blindly grants the maximum authority to the application programs, and when the application programs run in the background, the user can call the microphone of the smart phone in a silent mode to acquire sound information sent by the user and eavesdrop the user.
In the prior art, in order to avoid the user to be eavesdropped, a microphone switch is mainly arranged on the mobile terminal, when the user does not need to use the microphone, the pickup function of the microphone can be forcibly closed through the microphone switch, the microphone is prevented from being called when the application program runs at the background, and the sound information sent by the user is picked up.
However, the anti-eavesdropping method in the prior art is often poor in flexibility, and cannot actively detect whether an application program calls a microphone or not, so that a user cannot perceive whether the application program is eavesdropping or not, and the anti-eavesdropping effect is poor.
Disclosure of Invention
The application provides a mobile terminal for solve the current poor problem of mobile terminal anti-eavesdrop effect.
In a first aspect, an embodiment of the present application provides a mobile terminal, including a microphone, a control chip, and a detection circuit, where a first input end of the detection circuit is connected to the microphone, and a second input end of the detection circuit is connected to the control chip;
a first input end of the detection circuit is used for acquiring a power supply signal input to the microphone, and the power supply signal of the microphone is used for indicating whether the microphone works currently or not;
the control chip is used for outputting a corresponding level signal to the second input end of the detection circuit according to the current working state of the mobile terminal;
the detection circuit is used for carrying out logic operation according to the level signal output by the control chip and the power supply signal input to the microphone to obtain a target level signal, and the target level signal is used for indicating whether the microphone is abnormally called.
In a possible design of the first aspect, the control chip is configured to output a second level signal with a low level to the second input terminal of the detection circuit when the operating state of the mobile terminal is the standby state; and when the working state of the mobile terminal is a non-standby state, outputting a first level signal with high level to the second input end of the detection circuit.
In a possible design of the first aspect, the microphone further includes a power supply device, and the power supply device is connected to the microphone and the first input terminal of the detection circuit;
the detection circuit is used for power supply unit is right when the microphone supplies power, acquire input extremely the level of microphone is high first power signal, and power supply unit is right when the microphone cuts off the power supply, acquire input extremely the level of microphone is low second power signal.
In yet another possible design of the first aspect, the detection circuit includes a logic gate circuit, a first input terminal of the logic gate circuit is used as the first input terminal of the detection circuit, and a second input terminal of the logic gate circuit is used as the second input terminal of the detection circuit;
and the logic gate circuit is used for carrying out logic operation according to the first level signal/the second level signal and the first power supply signal/the second power supply signal to obtain a target level signal.
In yet another possible design of the first aspect, the logic gate circuit is configured to invert the level of the first level signal/the second level signal, perform an and operation on the first power supply signal/the second power supply signal and the first level signal/the second level signal after the level inversion to obtain an operation result, and perform a non-operation on the operation result to obtain the target level signal.
In yet another possible design of the first aspect, the detection circuit includes: the control end of the first switch tube is used as the second input end of the detection circuit, the output end of the first switch tube is grounded, and the input end of the first switch tube is connected with a system power supply of the mobile terminal;
the control end of the second switch tube is connected with the input end of the first switch tube, and the output end of the second switch tube is grounded;
the output end of the third switching tube is connected with the input end of the second switching tube, the input end of the third switching tube is connected with the system power supply, the input end of the third switching tube is used for outputting the target level signal, and the control end of the third switching tube is used as the first input end of the detection circuit.
In yet another possible design of the first aspect, the input end of the third switching tube is further connected to the control chip, and the control chip is connected to the power supply device;
the input end of the third switching tube is used for outputting the target level signal to the control chip when the target level signal indicates that the microphone is abnormally called;
the control chip is used for controlling the power supply device to cut off the power of the microphone according to the target level signal.
In yet another possible design of the first aspect, the mobile terminal further includes a display screen, the input end of the third switch tube is further connected to the control chip, and the control chip is connected to the display screen;
the input end of the third switching tube is used for outputting the target level signal to the control chip when the target level signal indicates that the microphone is abnormally called;
the control chip is used for controlling the display screen to light up and displaying preset prompt information according to the target level signal.
In yet another possible design of the first aspect, the detection circuit further includes a first resistor and a second resistor;
one end of the first resistor is connected with the system power supply, and the other end of the first resistor is connected with the input end of the first switching tube;
one end of the second resistor is connected with the system power supply, and the other end of the second resistor is connected with the input end of the third switching tube.
In yet another possible design of the first aspect, the mobile terminal further includes an indicator light device, and the input end of the third switch tube is connected to the indicator light device;
the indicator light device is used for controlling the indicator light of the indicator light device to be turned on/off according to the target level signal output by the input end of the third switching tube.
In yet another possible design of the first aspect, the mobile terminal is a mobile phone or a tablet computer.
The mobile terminal provided by the embodiment of the application can determine that the current working state of the mobile terminal is a standby state or a non-standby state by acquiring the level signal output by the control chip, and then determines whether the current microphone works or does not work according to the power signal input to the microphone, so that whether the microphone of the mobile terminal is abnormally called or not can be actively detected, the user can timely know whether the eavesdropping risk exists or not, and the eavesdropping prevention effect is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application;
fig. 1 is a schematic view of a display interface of a mobile terminal according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a mobile terminal according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a logic gate circuit according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a detection circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit diagram of an indicator light device according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic diagram of a display interface of a mobile terminal according to an embodiment of the present application, where the mobile terminal may be a mobile phone, a tablet computer, or other various portable communication devices, and a user may make a voice call through the mobile terminal, as shown in fig. 1, the mobile phone is taken as an example of the mobile terminal, and the mobile phone includes a display screen 11 and an application program 12 displayed in the display screen, and when an existing mobile phone user installs the application program 12 in the mobile phone, all permissions required by the existing mobile phone user are always granted by default, such as permission granted to call a microphone, permission to read a contact, permission to read a content of a short message, and the like, after the authorization is completed, a subsequent application program 12 may directly call the microphone, read the contact, read the short message, and the like in a running process, and no frame flicking is performed to prompt the user, so that when the user does not clear a background, the application program 12 running in the background may unknowingly call the microphone, the voice information of the user is stolen, and especially when the mobile phone is in a standby state, the user can make a misjudgment at this time, and subjectively thinks that the microphone of the mobile phone is not in a working state.
In the prior art, in order to avoid the user from being monitored, a microphone switch is mainly arranged on the mobile phone, when the user does not need to use the mobile phone, the microphone switch is turned on, so that the microphone does not work any more, and an application program of a background can not forcibly turn on the microphone, so that the microphone can not be called. The mode in the prior art is simple and rough, cannot enable a user to know whether an application program is intercepted currently, often needs frequent manual operation of the user, and is troublesome to use.
In view of the above problems, an embodiment of the present application provides a mobile terminal, which determines whether the mobile terminal is being used by a user by detecting a screen-on state or a screen-off state of a display screen, and if the mobile terminal is in the screen-off state, it indicates that the mobile terminal is not being used by the user, and if a microphone is detected to be working, it indicates that an application program may be stolen and the microphone is called for eavesdropping, so that the user can be prompted timely, voice information is prevented from being stolen by the application program under the unknown condition of the user, and the use safety of the mobile terminal is improved.
The technical solution of the present application will be described in detail below with reference to specific examples. It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2 is a block diagram of a mobile terminal according to an embodiment of the present disclosure, where the mobile terminal may be a mobile phone. As shown in fig. 2, the cellular phone 20 includes a microphone 22, a control chip 23, and a detection circuit 24.
A first input terminal of the detection circuit 24 is connected to the microphone 22, and a second input terminal of the detection circuit 24 is connected to the control chip 23.
The control chip 23 is configured to output a corresponding level signal to the second input terminal of the detection circuit 24 according to the current working state of the mobile terminal;
a first input of detection circuit 24 is used to obtain a power supply signal input to microphone 22.
The detection circuit 24 performs a logical operation based on the level signal output from the control chip 23 and the power supply signal input to the microphone 22 to obtain a target level signal.
The power supply signal of the microphone is used for indicating whether the microphone works currently, and the target level signal is used for indicating whether the microphone is abnormally called.
In this embodiment, the mobile terminal generally further includes a display 21, and the control chip 23 may be connected to the display 21. For example, when the display 21 is turned off, the current operating state of the mobile terminal may be indicated to enter a standby state, and when the display 21 is turned on, the mobile terminal may be indicated to enter an operating state, and the abnormal call of the microphone 22 means that when the operating state of the mobile terminal is the standby state, the microphone 22 is currently operating, for example, when the mobile terminal is in the standby state, a user should not use the mobile terminal, and at this time, the microphone 22 should not operate, but if an application program running in the background calls the microphone 22, the microphone 22 may enter an operating state, and the microphone 22 is still operating when the mobile terminal is in the standby state, and this state may be said to mean that the microphone 22 is abnormally called.
For example, the control chip 23 may be a processor of a mobile phone, the display 21 may be a touch screen, such as a capacitive screen or a resistive screen, and the display 21 and the control chip 23 may be connected by a Flexible Printed Circuit (FPC).
Illustratively, the microphone 22 may be a microphone. Control chip 23 may be connected to microphone 22 to control the input of current to microphone 22 to operate microphone 22, or to shut off the input of current to microphone 22 to deactivate microphone 22.
In this embodiment, the user may click or slide on the display screen 21 to illuminate the display screen 21, and when the display screen 21 is illuminated, the operation state of the mobile terminal is the non-standby state, and the control chip 23 outputs the first level signal to the second input terminal of the detection circuit 24. Further, when the user does not click or slide on the display screen 21 within a preset time, the display screen 21 may be automatically turned off, at this time, the working state of the mobile terminal is a standby state, and the control chip 23 outputs a second level signal to the second input terminal of the detection circuit 24.
The first level signal and the second level signal have different levels. For example, the first level signal may be a high level, and the second level signal may be a low level. When the display screen 21 is turned off, it can be shown that the user is not using the mobile phone currently and the mobile phone may be in a standby state, and at this time, a second level signal of a low level is output to the detection circuit 24, so that power consumption generated by standby can be reduced, and the standby duration of the mobile phone can be prolonged.
Illustratively, the microphone may be connected to a power supply device of the mobile terminal, and the first input of the detection circuit may be connected as a bypass between the microphone and the power supply device. The working current is input to the microphone through the power supply device of the mobile terminal, so that the microphone starts to work, and when the power supply device of the mobile terminal stops inputting the working current to the microphone, the microphone stops working.
When the power supply device of the mobile terminal stops inputting the working current to the microphone, the first input end of the detection circuit serving as the bypass cannot detect the bias voltage and can only acquire the second power supply signal with low level.
For example, when the first level signal is at a high level and the second level signal is at a low level, the first level signal and the second level signal are anded to obtain a low level signal, and the first level signal is negated, so that the level of the first level signal is inverted to a low level.
Illustratively, when the display screen is turned off/the mobile terminal is in a standby state, the control chip outputs a low level signal to the detection circuit, at this time, if the microphone is in the operating state, the detection circuit detects that the power signal input to the microphone is a high level signal, and performs an and operation on the low level signal output by the control chip and the power signal input to the microphone with a high level, and the obtained target level signal is a low level, which indicates that the microphone may be called by an application program running in a background in the mobile phone, that is, the microphone is abnormally called.
The embodiment of the application carries out logical operation through the level signal with control chip output and the power signal who inputs to the microphone, can obtain two kinds of results, and one kind of result is the target level signal that the level is high, and another kind of result is the target level signal that the level is low, through two kinds of different results, confirms whether the microphone is invoked by the anomaly.
In some embodiments, the control chip is configured to output a second level signal with a low level to the second input terminal of the detection circuit when the operating state of the mobile terminal is the standby state; and outputting a first level signal with high level to the second input end of the detection circuit when the working state of the mobile terminal is a non-standby state.
For example, the working state of the mobile phone may be determined according to the on/off of the display screen, when the display screen is on, it indicates that the user may use the mobile phone, and the working state of the mobile phone is a non-standby state, and when the display screen is off, it indicates that the working state of the mobile phone is a standby state, and the user does not use the mobile phone. It is understood that the lighting or turning off of the display to indicate the operating status of the mobile phone is merely an example, and in some extreme cases, the operating status of the mobile phone may not be correctly indicated, for example, when the display of the user is turned off, a voice call may be performed, and the operating status of the mobile phone is a non-standby status.
For example, when the operating state of the mobile phone is the non-standby state, a high-level first level signal may be output to the detection circuit, and if the microphone is currently operating, the detection circuit acquires that the power signal input to the microphone is a high-level signal, and performs an and operation on the first level signal and the high-level signal of the microphone, so that the obtained target level signal is a high level, which indicates that the microphone is not currently called abnormally.
According to the embodiment of the application, when the mobile phone is in the standby state, the second level signal of the low level is output to the detection circuit, so that the power consumption generated in the standby state can be reduced, and the standby time of the mobile terminal is prolonged.
Optionally, in some embodiments, the mobile terminal may further include a power supply device. The power supply device is connected with the microphone and the first input end of the detection circuit.
The detection circuit is used for acquiring a first power signal with high level input to the microphone when the power supply device supplies power to the microphone, and acquiring a second power signal with low level input to the microphone when the power supply device cuts off the power to the microphone.
This application embodiment carries out the power supply unit who supplies power through setting up to the microphone, can directly confirm whether microphone is current to work according to the power supply situation of microphone to obtain the power signal of microphone, circuit design is more simple convenient.
Illustratively, on the basis of the above embodiments, in some embodiments, the above detection circuit includes a logic gate circuit.
The first input end of the logic gate circuit is used as the first input end of the detection circuit, and the second input end of the logic gate circuit is used as the second input end of the detection circuit.
The logic gate circuit is used for carrying out logic operation according to the first level signal/the second level signal and the first power supply signal/the second power supply signal to obtain a target level signal.
In this embodiment, the logic gate circuit may be an and gate, a nand gate, a nor gate, or the like, the first level signal is at a high level, the second level signal is at a low level, the first power supply signal is at a high level, and the second power supply signal is at a low level. For example, taking an and gate as an example, the first level signal and the first power signal are and-operated, the obtained target level signal is high level to indicate that the microphone is not called abnormally currently, and the second level signal and the first power signal are and-operated, the obtained target level signal is low level to indicate that the microphone is called abnormally currently.
According to the embodiment of the application, the logic gate circuit is arranged, the level signal output by the control chip and the power supply signal input to the microphone are subjected to logic operation, and the target level signal can be high level or low level, so that whether the microphone is abnormally called or not is determined.
Optionally, fig. 3 is a schematic structural diagram of a logic gate circuit provided in this embodiment, as shown in fig. 3, the first input terminal 31 of the logic gate circuit 30 inputs power signals (i.e., a first power signal/a second power signal) of a microphone 34, the second input terminal 32 of the logic gate circuit 30 inputs level signals (i.e., a first level signal/a second level signal) output by a control chip 35, and the output terminal 33 of the logic gate circuit 30 is used for outputting a target level signal.
The logic gate circuit is used for inverting the level of the first level signal/the second level signal, performing AND operation on the first power supply signal/the second power supply signal and the first level signal/the second level signal after the level inversion to obtain an operation result, and performing NOT operation on the operation result to obtain a target level signal.
For example, the first level signal may be represented by a value of 1, the second level signal may be represented by a value of 0, the first power signal may be represented by a value of 1, the second power signal may be represented by a value of 0, and the following table 1 is a truth table of the logic gate circuit:
| serial number | Level signal output by control chip | Power supply signal of microphone | |
| 1 | 1 | 1 | 1 |
| 2 | 1 | 0 | 1 |
| 3 | 0 | 1 | 0 |
TABLE 1
In the above table, the first level signal value is 1, which indicates that the operating state of the mobile terminal is in a non-standby state, the first power signal value is 1, which indicates that the microphone currently has power input, and the microphone works, the second level signal value is 0, which indicates that the operating state of the mobile terminal is in a standby state, and the second power signal value is 0, which indicates that the microphone currently has no power input, and the microphone does not operate. The target level signal value obtained after the logic gate circuit operation is 1, which indicates that the current microphone is not abnormally called, and the target level signal value obtained after the logic gate circuit operation is 0, which indicates that the current microphone is abnormally called.
Fig. 4 is a schematic structural diagram of a detection circuit according to an embodiment of the present disclosure, and as shown in fig. 4, the detection circuit includes a first switching tube Q1, a second switching tube Q2, and a third switching tube Q3.
The control terminal G of the first switch Q1 is used as the second input terminal of the detection circuit, the output terminal S of the first switch Q1 is grounded, and the input terminal D of the first switch Q1 is connected to the system power supply S2 of the mobile terminal.
The control terminal G of the second switch Q2 is connected to the input terminal D of the first switch Q1, and the output terminal S of the second switch Q2 is grounded.
An output end S of the third switching tube Q3 is connected with an input end D of the second switching tube Q2, an input end D of the third switching tube Q3 is connected with the system power supply S2, an input end D of the third switching tube Q3 is used for outputting the target level signal S3, and a control end G of the third switching tube Q3 serves as a first input end of the detection circuit.
For example, the system power supply S2 may always provide power when the phone is powered on, and the system power supply S2 may stop providing power when the phone is powered off.
In this embodiment, the first switch Q1, the second switch Q2 and the third switch Q3 may be fets or triodes, and the microphone MIC may be powered by the power supply device 41.
For example, when the control chip outputs a first level signal with a high level to the control terminal G of the first switch Q1, the first switch Q1 is turned on, and the second switch Q2 is turned off, so that the input terminal D of the third switch Q3 is the target level signal MIC _ DET with a high level regardless of whether the level signal of the microphone MIC received by the control terminal G of the third switch Q3 is the first power signal or the second power signal. When the control chip outputs the second level signal with a low level to the control terminal G of the first switch tube Q1, the first switch tube Q1 is turned off, and at this time, the second switch tube Q2 and the third switch tube Q3 are both turned on, so that the input terminal D of the third switch tube Q3 is the target level signal MIC _ DET with a low level.
According to the embodiment of the application, the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 are arranged, the logical operation of the detection circuit is achieved, the target level signal MIC _ DET is obtained, the microphone can be detected to be called abnormally currently when the display screen is turned off and the microphone works currently, and the target level signal is output to prompt a user that the eavesdropping risk exists currently.
Optionally, in some embodiments, the detection circuit may further include a first resistor R1, a second resistor R2, and a third resistor R3.
One end of the first resistor R1 is connected with the system power supply S2, and the other end of the first resistor R1 is connected with the input end D of the first switch tube Q1;
one end of the second resistor R2 is connected with the system power supply S2, and the other end of the second resistor R2 is connected with the input end D of the third switching tube Q3;
one end of the third resistor R3 is connected to the microphone MIC and the power supply device 41, and the other end of the third resistor R3 is connected to the control end G of the third switching tube Q3.
This application embodiment is through setting up first resistance R1, second resistance R2 and third resistance R3, can restrict the electric current in the circuit, plays the effect of current-limiting, avoids circuit current too big, causes the damage of components and parts.
For example, on the basis of the above embodiments, in some embodiments, the input end D of the third switching tube Q3 may be further connected to a control chip, and the control chip is connected to the power supply device 41.
The input end D of the third switch tube Q3 is used for outputting a target level signal to the control chip when the target level signal indicates that the microphone MIC is abnormally called;
the control chip is used for controlling the power supply device 41 to cut off the power of the microphone according to the target level signal.
For example, the control chip may include a plurality of pins, wherein a General-purpose input/output (GPIO) interface of the control chip may be connected to the control terminal of the first switch tube for outputting the level signal.
In this embodiment, if the target level signal is a low level signal, it indicates that the current microphone MIC is abnormally called, and the control chip can control the power supply device to cut off the power supply to the microphone, so that the microphone MIC stops working, the voice information of the user can be timely avoided being stolen, and the anti-eavesdropping effect is improved.
Optionally, in some embodiments, the input end D of the third switching tube Q3 is further connected to a control chip, and the control chip is connected to the display screen.
The input end D of the third switching tube Q3 is used for outputting a target level signal to the control chip when the target level signal indicates that the microphone is abnormally called;
the control chip is used for controlling the display screen to light and display preset prompt information according to the target level signal.
In this embodiment, if the target level signal is a low level signal, it indicates that the current microphone is abnormally called, and the operating state of the mobile terminal is a standby state, at this time, the display screen should be turned off, and the current control chip may control the display screen to be turned on to prompt the user, and may display a preset prompt message on the display screen.
For example, the preset hint information may be a text message, such as "there is currently an eavesdropping risk".
Illustratively, when the display screen is lighted up and preset prompt information is displayed, a user can avoid calling a microphone by manually cleaning the application program running in the background, and the user is prevented from being eavesdropped.
Optionally, when the control chip receives a target level signal indicating that the microphone is abnormally called, a feedback signal may be sent to the operating system of the mobile phone, and the operating system of the mobile phone automatically cleans the application program running in the background.
In this embodiment, if the target level signal is a low level signal, the current microphone is indicated to be abnormally called, the control chip can control the display screen to light up, and the display prompt information prompts the user, so that the user can timely perceive that the current eavesdropping risk exists.
Optionally, in some embodiments, fig. 5 is a circuit schematic diagram of an indicator light device provided in the embodiments of the present application, and as shown in fig. 5, the mobile terminal may further include an indicator light device 51, and the input end D of the third switching tube Q3 is connected to the indicator light device.
The indicator light device is used for controlling the indicator light of the indicator light device to be turned on/off according to the target level signal output by the input end of the third switching tube.
For example, the indicator light may be a diode D1, and the indicator light device may include a system power supply 52, wherein the system power supply 52 may be a system power supply of the mobile terminal, the input terminal D of the third switching tube Q3 is connected to the output terminal of the diode D1, and the input terminal of the diode D1 is connected to the system power supply 52.
In the present embodiment, the diode D1 is turned on when the target level signal of low level is output from the input terminal D of the third switching transistor Q3, and the diode D1 is turned off when the target level signal of high level is output from the input terminal of the third switching transistor Q3.
For example, the indicator light device may further include a fourth resistor R4 and a fifth resistor R5, wherein one end of the fourth resistor R4 is connected to the control terminal G of the third switching tube Q3, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the output terminal of the diode D1.
For example, if the display screen of the mobile terminal is a non-full screen, the diode may be disposed at a corner of the display screen for the user to view in real time.
This application embodiment is through setting up the pilot lamp device, when target level signal is low level signal, instructs current microphone to be invoked by the anomaly, can indicate the user through lighting the pilot lamp, and there may be the current risk of eavesdropping, improves and prevents eavesdropping the effect.
In some embodiments, the mobile terminal may be a mobile phone or a tablet computer.
In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division". "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for convenience of description and distinction and are not intended to limit the scope of the embodiments of the present application. In the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. A mobile terminal is characterized by comprising a microphone, a control chip and a detection circuit, wherein a first input end of the detection circuit is connected with the microphone, and a second input end of the detection circuit is connected with the control chip;
a first input end of the detection circuit is used for acquiring a power supply signal input to the microphone, and the power supply signal of the microphone is used for indicating whether the microphone works currently or not;
the control chip is used for outputting a corresponding level signal to the second input end of the detection circuit according to the current working state of the mobile terminal;
the detection circuit is used for carrying out logic operation according to the level signal output by the control chip and the power supply signal input to the microphone to obtain a target level signal, and the target level signal is used for indicating whether the microphone is abnormally called.
2. The mobile terminal according to claim 1, wherein the control chip is configured to output a second level signal with a low level to the second input terminal of the detection circuit when the operating state of the mobile terminal is the standby state; and when the working state of the mobile terminal is a non-standby state, outputting a first level signal with high level to the second input end of the detection circuit.
3. The mobile terminal of claim 2, further comprising a power supply device, said power supply device being connected to said microphone, said first input of said detection circuit;
the detection circuit is used for power supply unit is right when the microphone supplies power, acquire input extremely the level of microphone is high first power signal, and power supply unit is right when the microphone cuts off the power supply, acquire input extremely the level of microphone is low second power signal.
4. A mobile terminal according to claim 3, characterized in that the detection circuit comprises a logic gate circuit having a first input as the first input of the detection circuit and a second input as the second input of the detection circuit;
and the logic gate circuit is used for carrying out logic operation according to the first level signal/the second level signal and the first power supply signal/the second power supply signal to obtain a target level signal.
5. The mobile terminal according to claim 4, wherein the logic gate circuit is configured to invert the level of the first/second level signal, perform an and operation on the first/second power signal and the level-inverted first/second level signal to obtain an operation result, and perform a non-operation on the operation result to obtain the target level signal.
6. The mobile terminal of claim 5, wherein the detection circuit comprises: the first switching tube, the second switching tube and the third switching tube;
the control end of the first switch tube is used as the second input end of the detection circuit, the output end of the first switch tube is grounded, and the input end of the first switch tube is connected with the system power supply of the mobile terminal;
the control end of the second switch tube is connected with the input end of the first switch tube, and the output end of the second switch tube is grounded;
the output end of the third switching tube is connected with the input end of the second switching tube, the input end of the third switching tube is connected with the system power supply, the input end of the third switching tube is used for outputting the target level signal, and the control end of the third switching tube is used as the first input end of the detection circuit.
7. The mobile terminal according to claim 6, wherein the input terminal of the third switching tube is further connected to the control chip, and the control chip is connected to the power supply device;
the input end of the third switching tube is used for outputting the target level signal to the control chip when the target level signal indicates that the microphone is abnormally called;
the control chip is used for controlling the power supply device to cut off the power of the microphone according to the target level signal.
8. The mobile terminal according to claim 6, wherein the mobile terminal further comprises a display screen, the input terminal of the third switch tube is further connected to the control chip, and the control chip is connected to the display screen;
the input end of the third switching tube is used for outputting the target level signal to the control chip when the target level signal indicates that the microphone is abnormally called;
the control chip is used for controlling the display screen to light up and displaying preset prompt information according to the target level signal.
9. The mobile terminal of claim 6, wherein the detection circuit further comprises a first resistor, a second resistor, and a third resistor;
one end of the first resistor is connected with the system power supply, and the other end of the first resistor is connected with the input end of the first switching tube;
one end of the second resistor is connected with the system power supply, and the other end of the second resistor is connected with the input end of the third switching tube;
one end of the third resistor is connected with the microphone, and the other end of the third resistor is connected with the control end of the third switch tube.
10. The mobile terminal of claim 6, further comprising an indicator light device, wherein the input terminal of the third switch tube is connected to the indicator light device;
the indicator light device is used for controlling the indicator light of the indicator light device to be turned on/off according to the target level signal output by the input end of the third switching tube.
11. The mobile terminal according to any of claims 1-10, wherein the mobile terminal is a mobile phone or a tablet computer.
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| CN202110797957.3A CN113271371B (en) | 2021-07-15 | 2021-07-15 | Mobile terminal |
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| CN202110797957.3A CN113271371B (en) | 2021-07-15 | 2021-07-15 | Mobile terminal |
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| CN113271371B (en) | 2021-10-08 |
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