Microphone and electronic device

Abstract

The invention discloses a microphone and electronic equipment, and belongs to the technical field of electronics. The microphone middle shell is connected with the carrier plate to form a first cavity, the cavity wall of the first cavity is provided with a pickup hole, and the energy storage device, the pickup device and the acoustic-electric conversion device are all arranged in the first cavity; the pickup device comprises a first back electrode and a first vibrating diaphragm, the first back electrode and the first vibrating diaphragm are connected to form a second cavity, a back electrode hole of the first back electrode is communicated with the pickup hole and the second cavity, and the pickup device is used for collecting sound waves transmitted to the second cavity through the pickup hole, converting the sound waves into first electric signals and outputting the first electric signals to the outside of the microphone; the acoustic-electric conversion device comprises a second back electrode and a second vibrating diaphragm, the second back electrode and the second vibrating diaphragm are connected to form a third cavity, a back electrode hole of the second back electrode is communicated with the pickup hole and the third cavity, and the acoustic-electric conversion device is used for collecting sound waves transmitted to the third cavity through the pickup hole, converting the sound waves into second electric signals and transmitting the second electric signals to the energy storage device; the energy storage device is used for supplying power to the microphone.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and specifically relates to a microphone and an electronic device. Background Art

[0002] With the development of mobile terminals, mobile terminals have become an indispensable tool in people's daily lives. A microphone is an energy conversion device that can convert sound into electrical signals, which provides an important radio function for mobile terminals. Currently, mobile terminals usually use their built-in power supply to power the microphone.

[0003] However, when the mobile terminal is in microphone working scenarios such as talking and recording for a long time, the power consumption of the microphone is high, which affects the usage time of the mobile terminal. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a microphone and an electronic device that can solve the problem of high power consumption of the microphone when the mobile terminal is in microphone working scenarios such as calls and recordings for a long time, thereby affecting the use time of the mobile terminal.

[0005] In a first aspect, an embodiment of the present application provides a microphone, the microphone comprising: a shell, a carrier plate, an energy storage device, a sound pickup device and at least one sound-to-electric conversion device; the shell and the carrier plate are connected to form a first cavity, the cavity wall of the first cavity has a sound pickup hole, the energy storage device, the sound pickup device and the sound-to-electric conversion device are all arranged in the first cavity; the sound pickup device comprises a first back pole and a first diaphragm, the first back pole and the first diaphragm are connected to form a second cavity, the back pole hole of the first back pole connects the sound pickup hole and the second cavity, the sound pickup device is used to collect sound waves transmitted to the second cavity through the sound pickup hole, and convert them into a first electrical signal to output to the outside of the microphone;

[0006] The acoustic-to-electric conversion device comprises a second back pole and a second diaphragm, the second back pole and the second diaphragm are connected to form a third cavity, the back pole hole of the second back pole connects the sound pickup hole and the third cavity β, the acoustic-to-electric conversion device is used to collect the sound waves transmitted to the third cavity through the sound pickup hole, and convert them into second electrical signals to transmit to the energy storage device; the energy storage device is used to power the microphone.

[0007] In a second aspect, an embodiment of the present application provides an electronic device, comprising the microphone described in any one of the first aspects.

[0008] In a third aspect, an embodiment of the present application provides a power supply adjustment method, which is applied to any microphone described in the first aspect, or to the electronic device described in the second aspect, and the method includes: obtaining the power of an external power supply connected to the power supply end of the microphone; when the power is lower than a target power threshold, controlling the energy storage device and the power supply end to be turned on.

[0009] In a fourth aspect, an embodiment of the present application provides an electronic device, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the third aspect are implemented.

[0010] In a fifth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the third aspect are implemented.

[0011] In a sixth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the third aspect.

[0012] In a seventh aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the method described in the third aspect.

[0013] In an embodiment of the present application, the microphone includes a housing, a carrier plate, an energy storage device, a sound pickup device, and at least one acoustic-to-electric conversion device. Among them, the sound pickup device can be used to collect sound waves transmitted to the second cavity in the sound pickup device, and convert them into a first electrical signal to be output to the outside of the microphone. The acoustic-to-electric conversion device can be used to collect sound waves transmitted to the third cavity in the acoustic-to-electric conversion device, and convert them into a second electrical signal to be transmitted to the energy storage device. In this technical solution, the microphone can convert sound waves into a second electrical signal through the acoustic-to-electric conversion device to store it in the energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reduce the power supply time of the external power supply to the microphone, and increase the power supply time of the external power supply. In the case where the microphone is set in an electronic device, the energy storage device is used to power the microphone, which can reduce the power supply time of the power supply of the electronic device to the microphone and increase the use time of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is one of the structural schematic diagrams of the microphone provided in the embodiment of the present application;

[0015] Figure 2This is the second structural schematic diagram of the microphone provided in the embodiment of the present application;

[0016] Figure 3 This is the third structural diagram of the microphone provided in the embodiment of the present application;

[0017] Figure 4 This is the fourth structural diagram of the microphone provided in the embodiment of the present application;

[0018] Figure 5 This is the fifth structural diagram of the microphone provided in the embodiment of the present application;

[0019] Figure 6 It is one of the structural schematic diagrams of the chip provided in the embodiment of the present application;

[0020] Figure 7 This is one of the flow charts of the power supply adjustment method provided in the embodiment of the present application;

[0021] Figure 8 It is one of the block diagrams of the power supply adjustment device provided in the embodiment of the present application;

[0022] Fig. 9 is one of the block diagrams of the electronic device according to the embodiment of the present application;

[0023] Fig.10 This is one of the hardware structure diagrams of the electronic device according to the embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0025] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0026] The microphone and electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0027] With the development of mobile terminals, mobile terminals have become an indispensable tool in people's daily lives. A microphone is an energy conversion device that can convert sound into electrical signals, which provides an important sound receiving function for mobile terminals. For example, the microphone can be a silicon microphone, and its structure includes: a housing, a carrier board, a chip, a MEMS transducer, a first connecting line and a second connecting line. Among them, the MEMS transducer includes a back pole, a diaphragm (i.e., a vibrating diaphragm), and a base. The MEMS transducer is used to convert sound into electrical signals.

[0028] Wherein, the shell and the carrier are connected to form a first cavity. The chip, the back electrode, the diaphragm (i.e., the vibrating diaphragm), the base, the first connecting line and the second connecting line are all arranged in the first cavity. The base and the back electrode are stacked and arranged on one side of the carrier, and the diaphragm is connected to the back electrode through the base to form a second cavity. In addition, the carrier has a sound pickup hole. The base has a hollow area. The back electrode has a back electrode hole. The back electrode hole connects the sound pickup hole and the second cavity through the hollow area. In the MEMS transducer, the back electrode and the diaphragm can form a variable capacitor. When sound is transmitted into the second cavity through the sound pickup hole, the sound wave of the sound will cause the diaphragm to vibrate, so that the distance between the diaphragm and the back electrode changes with the vibration, and the capacitance value between the diaphragm and the back electrode changes. The MEMS transducer is used to collect the sound waves transmitted into the second cavity through the sound pickup hole by using the change of the capacitance value between the diaphragm and the back electrode, convert the sound waves into electrical signals, and transmit them to the chip through the first connecting line. The chip is connected to the carrier board via a second connection line, and is used to transmit the electrical signal converted from the sound wave to the outside of the microphone via a carrier wave. The electrical signal is used to identify the sound wave.

[0029] As a further example, the chip may include: a bias signal terminal VBIAS, a charge pump (Charge Pump), a voltage regulator (LDO), a filter (Filter), an external power supply terminal VDD, a non-volatile memory (NVM), an input signal terminal VIN, a bottom noise amplifier (LNA), an output buffer (Out Buffer), an output signal terminal VOUT and a ground terminal GND. Among them, the external power supply terminal VDD is connected to the power supply terminal of the microphone, and is used to connect to an external power supply (i.e., a power supply built into the mobile terminal) so that the external power supply powers the microphone. The external power supply terminal VDD is connected to the bias signal terminal VBIAS through a filter, a voltage regulator and a charge pump. The bias signal terminal VBIAS is connected to the diaphragm of the MEMS transducer. The input signal terminal VIN is connected to the back pole of the MEMS transducer, and is used to transmit the electrical signal converted from the sound wave to the bottom noise amplifier, and then through the output buffer, it is output to the outside of the microphone by the output signal terminal VOUT.

[0030] Among them, the filter, the voltage regulator and the charge pump are the power modulation module. The voltage provided by the power supply terminal VDD, after being processed by the filter and the voltage regulator, provides the input voltage for the charge pump, and provides the power supply voltage for the bottom noise amplifier and the output buffer. The charge pump performs multi-stage amplification on its input voltage and outputs it to the diaphragm of the MEMS transducer. The bottom noise amplifier receives the electrical signal transmitted by the back electrode and amplifies it, and outputs the amplified electrical signal to the outside of the microphone through the output buffer.

[0031] However, even if the operating current of the silicon microphone is milliampere (mA), when the mobile terminal is in microphone working scenarios such as calling and recording for a long time, the power consumption of the power supply is relatively high, which affects the use time of the mobile terminal.

[0032] Please refer to Figure 1 , which shows a schematic diagram of the structure of a microphone provided in an embodiment of the present application. The microphone can solve the above-mentioned problems to a certain extent. Figure 1 As shown, the microphone 10 includes: a housing 101 , a carrier board 102 , an energy storage device, a sound pickup device 110 and at least one sound-to-electricity conversion device 111 .

[0033] The housing 101 is connected to the carrier 102 to form a first cavity. The cavity wall of the first cavity has a sound pickup hole 1021. The energy storage device, the sound pickup device 110 and the sound-to-electric conversion device 111 are all arranged in the first cavity. It should be noted that: Figure 1 The microphone 10 includes an acoustic-to-electric conversion device. Figure 1 The number of the acoustic-to-electrical conversion devices 111 does not limit the number of the acoustic-to-electrical conversion devices 111 that the microphone 10 can include.

[0034] The sound pickup device 110 includes a first back pole 104A and a first diaphragm 105A. The first back pole 104A is connected to the first diaphragm 105A to form a second cavity α. The back pole hole 1041 of the first back pole 104A connects the sound pickup hole 1021 and the second cavity α. The sound pickup device 110 is used to collect sound waves transmitted to the second cavity α through the sound pickup hole 1021, and convert them into a first electrical signal to output to the outside of the microphone 10. The first signal is used to identify the sound waves transmitted to the microphone.

[0035] The acoustic-to-electric conversion device 111 includes a second back pole 104B and a second diaphragm 105B. The second back pole 104B and the second diaphragm 105B are connected to form a third cavity β. The back pole hole 1041 of the second back pole 104B connects the sound pickup hole 1021 and the third cavity β. The acoustic-to-electric conversion device 111 is used to collect the sound waves transmitted to the third cavity β through the sound pickup hole 1021, and convert them into a second electrical signal to transmit to the energy storage device.

[0036] Optionally, the third cavity β is larger than the second cavity α. Therefore, compared with the pickup device 110, the distance between the second back pole 104B and the second diaphragm 105B in the acoustic-to-electric conversion device 111, and / or the effective vibration area between the second back pole 104B and the second diaphragm 105B, that is, the projection area of ​​the second diaphragm 105B on the second back pole 104B is larger. The acoustic-to-electric conversion principle of the pickup device 110 and the acoustic-to-electric conversion device 111 follows the conversion formula of parallel electrode plates: ε is the relative dielectric constant of the medium between the plates. S is the plate area. U is the coupling voltage between the two plates. k is the electrostatic force constant. d is the distance between the plates. Q is the charge of the plates. According to the conversion formula of parallel electrode plates, the distance between the plates (i.e., the distance between the second back pole 104B and the second diaphragm 105B) is proportional to the converted voltage, and the plate area (i.e., the effective vibration area between the second back pole 104B and the second diaphragm 105B) is proportional to the converted voltage. Therefore, compared with the sound pickup device 110, the acoustic-to-electric conversion device 111 can obtain a stronger electrical signal by converting sound waves for storage in the energy storage device. The energy storage device is used to power the microphone 10. By way of example, the energy storage device is also used to power the microphone 10 when the power of the external power supply of the microphone 10 is lower than the target power threshold.

[0037] Further optionally, the microphone 10 also includes a chip 103. The chip 103 is disposed in the first cavity. The chip 103 is used to control the conduction between the energy storage device and the power supply end of the microphone 10. The power supply end is used to power the microphone. Optionally, the power supply end of the microphone 10 is used to be connected to an external power supply. The external power supply is used to power the microphone 10. The chip 103 is also used to control the conduction between the energy storage device and the power supply end when the power of the external power supply is lower than the target power threshold, so that the energy storage device powers the microphone 10 through the power supply end.

[0038] In an embodiment of the present application, the microphone includes a housing, a carrier plate, an energy storage device, a sound pickup device, and at least one acoustic-to-electric conversion device. Among them, the sound pickup device can be used to collect sound waves transmitted to the second cavity in the sound pickup device, and convert them into a first electrical signal to be output to the outside of the microphone. The acoustic-to-electric conversion device can be used to collect sound waves transmitted to the third cavity in the acoustic-to-electric conversion device, and convert them into a second electrical signal to be transmitted to the energy storage device. In this technical solution, the microphone can convert sound waves into a second electrical signal through the acoustic-to-electric conversion device to store it in the energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reduce the power supply time of the external power supply to the microphone, and increase the power supply time of the external power supply. In the case where the microphone is set in an electronic device, the energy storage device is used to power the microphone, which can reduce the power supply time of the power supply of the electronic device to the microphone and increase the use time of the electronic device.

[0039] In some embodiments of the present application, the first backpole 104A of the sound pickup device 110 and the first backpole 104B of the acoustic-to-electric conversion device 111 may be the same backpole or may be independent backpole. Based on these two situations, the microphone structures are introduced separately below.

[0040] In an optional case, the first backpole 104A and the second backpole 104B are the same backpole. The first diaphragm 105A is located in the third cavity β, and the first diaphragm 105A has a diaphragm air leakage hole 1051 .

[0041] When the number of the acoustic-to-electric conversion device 111 is one, Figure 1 As shown, the diaphragm air leakage hole 1051 of the first diaphragm 105A and the back pole hole 1041 of the first back pole 104A are connected to the third cavity β, the second cavity α and the sound pickup hole 1021 of the acoustic-to-electric conversion device 111 .

[0042] In this case, the first back electrode 104A and the first diaphragm 105A constitute a variable capacitor. The first back electrode 104A and the second diaphragm 105B also constitute a variable capacitor. The first back electrode 104A is a fixed plate of the variable capacitor. The first diaphragm 105A and the second diaphragm 105B are movable plates of the variable capacitor.

[0043] When the microphone 10 is in working state, sound waves can be introduced into the second cavity α through the sound pickup hole 1021 and the back pole hole 1041 of the first back pole 104A, and the sound waves introduced into the second cavity α push the first diaphragm 105A to vibrate, so as to change the capacitance value between the first back pole 104A and the first diaphragm 105A, and then convert and output the first electrical signal. Sound waves can be introduced into the third cavity β through the sound pickup hole 1021, the back pole hole 1041 of the first back pole 104A, and the diaphragm air vent hole 1051 of the first diaphragm 105A, and the sound waves introduced into the third cavity β push the second diaphragm 105B to vibrate, so as to change the capacitance value between the first back pole 104A and the second diaphragm 105B, and then convert and output the second electrical signal.

[0044] Among them, the third cavity β is larger than the second cavity α. Since the first backpole 104A and the second backpole 104B are the same backpole. Therefore, the effective vibration area between the first backpole 104A and the first diaphragm 105A, that is, the target projection area of ​​the first diaphragm 105A on the first backpole 104A, is equal to the effective vibration area between the second backpole 104B and the second diaphragm 105B, that is, the projection area of ​​the second diaphragm 105B on the second backpole 104B. Therefore, the first diaphragm 105A is located in the third cavity β. The plate distance between the first backpole 104A and the first diaphragm 105A is smaller than the plate distance between the second backpole 104B and the second diaphragm 105B.

[0045] When the number of the acoustic-to-electric conversion devices 111 is at least two, as shown in FIG. Figure 2 As shown, the acoustic-to-electric conversion devices 111 are nested. Each second diaphragm 105B has a diaphragm air leakage hole 1051. Multiple diaphragm air leakage holes 1051 and the back pole hole 1041 of the first back pole 104A are connected to the third cavity β, the second cavity α and the pickup hole 1021 of each acoustic-to-electric conversion device 111. In this way, when the microphone 10 is in working state, sound waves can be introduced into the second cavity α and the third cavity β of each acoustic-to-electric conversion device 111 in sequence through the pickup hole 1021. For example, Figure 2 It is taken as an example that the microphone 10 includes two acoustic-to-electrical conversion devices 111 .

[0046] It should be noted that, in some embodiments, the diaphragm vent holes 1051 of the first diaphragm 105A and the back pole holes 1041 of the first back pole 104A are staggered. And when there are at least two acoustic-to-electric conversion devices 111, the diaphragm vent holes 1051 of any two adjacent second diaphragms 105B are staggered. In this way, it is possible to avoid convection of airflow in the second cavity and the third cavity, which causes energy loss.

[0047] In some embodiments of the present application, the sound pickup device 110 may further include a first base 106A. The first base 106A and the first back pole 104A are stacked on one side of the carrier 102, and the first base 106A has a hollow area 1061. The back pole hole 1041 of the first back pole 104A is connected to the sound pickup hole 1021 through the hollow area 1061 of the first base 106A.

[0048] The acoustic-to-electric conversion device 111 includes a second base 106B. The second base 106B and the second back electrode 104B are stacked on one side of the carrier 102, and the second base 106B has a hollow area 1061. The back electrode hole 1041 of the second back electrode 104B is connected to the sound pickup hole 1021 through the hollow area 1061 of the second base 106B.

[0049] The first back electrode 104A and the second back electrode 104B are the same back electrode 104. The first base 106A and the second base 106B are the same base 106. In an optional case, Figure 1 and Figure 2 As shown, the second diaphragm 105B in the acoustic-electric conversion device 111 can be connected to the back electrode 104 through the base 106 to form a third cavity. Similarly, the first diaphragm 105A in the pickup device 110 can also be connected to the back electrode 104 through the base 106 to form a second cavity.

[0050] In another optional case, the first backpole 104A and the second backpole 104B are different backpole. The effective vibration area S1 between the second backpole 104B and the second diaphragm 105B, that is, the projection area of ​​the second diaphragm 105B on the second backpole 104B can be larger than the target projection area S2, so that the third cavity β is larger than the second cavity α. And / or, the plate distance d1 between the second backpole 104B and the second diaphragm 105B can also be larger than the plate distance d2 between the first backpole 104A and the first diaphragm 105A.

[0051] In an alternative case, if Figure 3 As shown, the first cavity includes a plurality of inner wall surfaces. The sound pickup device 110 is disposed on the first inner wall surface, and the first inner wall surface has a sound pickup hole 1021 connected to the second cavity α. The acoustic-electric conversion device 111 is disposed on the second inner wall surface, and the second inner wall surface has a sound pickup hole 1021 connected to the third cavity β. The first inner wall surface and the second inner wall surface are different inner wall surfaces among the plurality of inner wall surfaces. It should be noted that, Figure 3 The microphone 10 includes an acoustic-to-electric conversion device 111 as an example.

[0052] Optionally, the first inner wall surface and the second inner wall surface may be two opposite inner wall surfaces. For example, please continue to refer to Figure 3 The sound pickup device 110 is disposed on the carrier board 102 , and the sound-to-electric conversion device 111 is disposed on the inner surface of the housing 101 opposite to the carrier board 102 .

[0053] In this case, the first back electrode 104A and the first diaphragm 105A constitute a variable capacitor. The second back electrode 104B and the second diaphragm 105B also constitute a variable capacitor. The first back electrode 104A and the second back electrode 104B are both fixed plates of the variable capacitor. The first diaphragm 105A and the second diaphragm 105B are movable plates of the variable capacitor.

[0054] When the microphone 10 is in operation, sound waves can be introduced into the second cavity α through the sound pickup hole 1021 and the back pole hole 1041 of the first back pole 104A, and the sound waves introduced into the second cavity α push the first diaphragm 105A to vibrate, so as to change the capacitance value between the first back pole 104A and the first diaphragm 105A, thereby converting and outputting a first electrical signal. Sound waves can be introduced into the third cavity β through the sound pickup hole 1021 and the back pole hole 1041 of the second back pole 104B, and the sound waves introduced into the third cavity β push the second diaphragm 105B to vibrate, so as to change the capacitance value between the second back pole 104B and the second diaphragm 105B, thereby converting and outputting a second electrical signal.

[0055] It should be noted that, in some embodiments, the diaphragm air vent 1051 of the first diaphragm 105A is staggered with the back pole hole 1041 of the first back pole 104A. The diaphragm air vent 1051 of the second diaphragm 105B is staggered with the back pole hole 1041 of the second back pole 104B. In this way, it is possible to avoid convection of airflow in the second cavity and the third cavity, which causes energy loss.

[0056] Further optionally, in the case where the microphone 10 includes at least two acoustic-to-electrical conversion devices 111 , the second backpole 104A of each acoustic-to-electrical conversion device 111 may also be the same backpole, or may also be different independent backpoles.

[0057] In an optional case, the second back electrode 104A of each acoustic-to-electric conversion device 111 may also be the same back electrode. Figure 4 As shown, at least two acoustic-to-electric conversion devices 111 can be nested. The second diaphragm 105B of each acoustic-to-electric conversion device 111 has a diaphragm air leakage hole 1051. Multiple diaphragm air leakage holes 1051 and the back pole hole 1041 of the first back pole 104A are connected to the third cavity β, the second cavity α and the pickup hole 1021 of each acoustic-to-electric conversion device 111. In this way, when the microphone 10 is in working state, sound waves can be introduced into the second cavity α and the third cavity β of each acoustic-to-electric conversion device 111 in sequence through the pickup hole 1021. For example, Figure 4 It is taken as an example that the microphone 10 includes two acoustic-to-electrical conversion devices 111 .

[0058] In another optional case, the second back electrode 104A of each acoustic-to-electric conversion device 111 may also be a different independent back electrode. Each acoustic-to-electric conversion device 111 may be disposed on the same inner wall surface of the first cavity, or at least some of the acoustic-to-electric conversion devices 111 may be disposed on different inner wall surfaces of the first cavity. For example, Figure 5 As shown, the microphone 10 includes two sound-to-electric conversion devices 111. The sound pickup device 110 is disposed on the carrier 102. The two sound-to-electric conversion devices 111 can be disposed side by side on the inner surface of the housing 101 opposite to the carrier 102.

[0059] In some embodiments of the present application, the sound pickup device 110 may further include a first base 106A. The first base 106A and the first back pole 104A are stacked on one side of the carrier 102, and the first base 106A has a hollow area 1061. The back pole hole 1041 of the first back pole 104A is connected to the sound pickup hole 1021 through the hollow area 1061 of the first base 106A.

[0060] The acoustic-to-electric conversion device 111 includes a second base 106B. The second base 106B and the second back electrode 104B are stacked on one side of the carrier 102, and the second base 106B has a hollow area 1061. The back electrode hole 1041 of the second back electrode 104B is connected to the sound pickup hole 1021 through the hollow area 1061 of the second base 106B.

[0061] Alternatively, if Figures 1 to 5 , the microphone 10 further includes: a first connection line 107. The first connection line 107 is arranged between the sound pickup device 110 and the chip 103, and is used for the sound pickup device 110 to transmit a first electrical signal to the chip 103. Similarly, optionally, the microphone 10 further includes: a third connection line 112. The third connection line 112 is arranged between the sound-to-electric conversion device 111 and the chip 103, and is used for the sound-to-electric conversion device 111 to transmit a second electrical signal to the chip 103. Further optionally, the microphone 10 further includes: a second connection line 109. The second connection line 109 is arranged between the chip 103 and the carrier board 102, and is used for the chip 103 to transmit an electrical signal to the carrier board 102. For example, the chip 103 can transmit a first electrical signal to the carrier board 102, so as to output the first electrical signal to the outside of the microphone 10 through the carrier board 102.

[0062] Further optionally, the microphone 10 also includes a chip 103. The acoustic-to-electric conversion device 111 is also used to transmit a second electrical signal to the chip 103. The chip 103 is also used to perform analog-to-digital conversion (ADC) sampling processing on the second electrical signal to obtain a processed second electrical signal, perform filtering processing on the processed second electrical signal to obtain a filtered second electrical signal, amplify the filtered second electrical signal to obtain an amplified second electrical signal, and transmit the amplified second electrical signal to the energy storage device.

[0063] In an alternative case, if Figure 6 As shown, the chip 103 includes: an ADC module 1037 , a sampling and filtering module 1038 , an amplifier circuit 1039 and a charging control circuit 10310 .

[0064] Among them, the ADC module 1037 is used to perform ADC sampling processing on the second electrical signal through the sound pressure conversion terminal VC, and obtain and transmit the processed second electrical signal to the sampling and filtering module 1038. The sampling and filtering module 1038 is used to filter the processed second electrical signal, obtain and transmit the filtered second electrical signal to the amplifier circuit 1039. The amplifier circuit 1039 is used to amplify the filtered second electrical signal, obtain and transmit the amplified second electrical signal to the energy storage device. The charging control circuit 10310 is respectively connected to the energy storage device and the power supply terminal VDD. The charging control circuit 10310 is used to control the energy storage device and the power supply terminal to be turned on when the power of the external power supply is lower than the target power threshold, so that the energy storage device can power the microphone 10 through the power supply terminal.

[0065] Further optionally, the chip 103 further includes: a charging protection circuit 10311. The charging protection circuit 10311 is connected to the energy storage device. The charging protection circuit 10311 is used to control the energy storage device to be disconnected from the power supply terminal through the charging control circuit 10310 when an abnormality of the energy storage device is detected. For example, Figure 6 The chip 103 structure shown can be Figure 2 The chip 103 shown in the figure is newly added with an ADC module 1037, a sampling and filtering module 1038, an amplifier circuit 1039, and a charging control circuit 10310. That is, the chip 103 includes: a bias signal terminal VBIAS, a charge pump 1031, a voltage regulator 1032, a filter 1033, an external power supply terminal VDD, a non-volatile memory 1034, an input signal terminal VIN, a bottom noise amplifier 1035, an output buffer 1036, an output signal terminal VOUT, and a ground terminal GND. The ADC module 1037, the sampling and filtering module 1038, the amplifier circuit 1039, the charging control circuit 10310, and the charging protection circuit 10311. It should be noted that Figure 6 Zhongyu Figure 2 For the functional introduction of repeated modules, please refer to the above Figure 2 The functions of each module are introduced in detail, and the embodiments of this application will not be elaborated on this.

[0066] In an embodiment of the present application, the microphone includes a housing, a carrier plate, an energy storage device, a sound pickup device, and at least one acoustic-to-electric conversion device. Among them, the sound pickup device can be used to collect sound waves transmitted to the second cavity in the sound pickup device, and convert them into a first electrical signal to be output to the outside of the microphone. The acoustic-to-electric conversion device can be used to collect sound waves transmitted to the third cavity in the acoustic-to-electric conversion device, and convert them into a second electrical signal to be transmitted to the energy storage device. In this technical solution, the microphone can convert sound waves into a second electrical signal through the acoustic-to-electric conversion device to store it in the energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reduce the power supply time of the external power supply to the microphone, and increase the power supply time of the external power supply. In the case where the microphone is set in an electronic device, the energy storage device is used to power the microphone, which can reduce the power supply time of the power supply of the electronic device to the microphone and increase the use time of the electronic device.

[0067] The present application also provides an electronic device. The electronic device includes the microphone provided in the present application. For example, the electronic device includes Figures 1 to 5 Any of the microphones shown.

[0068] In an embodiment of the present application, the electronic device includes a housing, a carrier board, an energy storage device, a sound pickup device, and at least one acoustic-to-electric conversion device. Among them, the sound pickup device can be used to collect sound waves transmitted to the second cavity in the sound pickup device, and convert them into a first electrical signal to be output to the outside of the microphone. The acoustic-to-electric conversion device can be used to collect sound waves transmitted to the third cavity in the acoustic-to-electric conversion device, and convert them into a second electrical signal to be transmitted to the energy storage device. In this technical solution, the microphone can convert the sound waves into a second electrical signal through the acoustic-to-electric conversion device to store it in the energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reduce the power supply time of the external power supply to the microphone, and increase the power supply time of the external power supply. In the case where the microphone is set in an electronic device, the energy storage device is used to power the microphone, which can reduce the power supply time of the power supply of the electronic device to the microphone and increase the use time of the electronic device.

[0069] Please refer to Figure 7 , which shows a flow chart of a power supply adjustment method provided in an embodiment of the present application. The power supply adjustment method can be applied to the microphone provided in an embodiment of the present application, or applied to the electronic device provided in an embodiment of the present application. Figure 7 As shown, the power supply adjustment method includes:

[0070] Step 901: Obtain the power level of an external power source connected to a power supply end of the microphone.

[0071] Optionally, step 901 may be performed by Figure 6 The charging control circuit 10310 in the chip shown is executed. The charging control circuit 10310 can obtain the power of the external power supply connected to the power supply terminal VDD of the microphone through the power supply terminal VDD.

[0072] Step 902: When the power level is lower than the target power level threshold, control the energy storage device and the power supply end to be turned on.

[0073] Optionally, step 901 may be performed by Figure 6 The charging control circuit 10310 in the chip shown is executed. After obtaining the power of the external power supply, the charging control circuit 10310 can compare the power below the target power threshold. When the power is higher than or equal to the target power threshold, the energy storage device and the power supply end are controlled to be disconnected to maintain the external power supply to the microphone. When the power is lower than the target power threshold, the energy storage device and the power supply end are controlled to be connected so that the energy storage device supplies power to the microphone.

[0074] In an embodiment of the present application, the microphone can convert sound waves into a second electrical signal through an acoustic-electric conversion device to store it in an energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reducing the power supply time of the external power supply to the microphone and increasing the power supply time of the external power supply. In the case where the microphone is set in an electronic device, using the energy storage device to power the microphone can reduce the power supply time of the electronic device to the microphone, and increase the use time of the electronic device.

[0075] The power supply adjustment method provided in the embodiment of the present application can be executed by a power supply adjustment device. In the embodiment of the present application, the power supply adjustment device provided in the embodiment of the present application is described by taking the power supply adjustment method executed by the power supply adjustment device as an example.

[0076] Please refer to Figure 8 , which shows a block diagram of a power supply adjustment device provided in an embodiment of the present application. The power supply adjustment device can be applied to the microphone provided in an embodiment of the present application, or applied to the electronic device provided in an embodiment of the present application. Figure 8 As shown, the power supply adjustment device 1000 includes:

[0077] The acquisition module 1001 is used to acquire the power of an external power source connected to the power supply end of the microphone.

[0078] The control module 1002 is used to control the energy storage device and the power supply end to be turned on when the power level is lower than the target power level threshold.

[0079] In an embodiment of the present application, the microphone can convert sound waves into a second electrical signal through an acoustic-electric conversion device to store it in an energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reducing the power supply time of the external power supply to the microphone and increasing the power supply time of the external power supply. In the case where the microphone is set in an electronic device, using the energy storage device to power the microphone can reduce the power supply time of the electronic device to the microphone, and increase the use time of the electronic device.

[0080] The power supply adjustment device in the embodiment of the present application is a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc. It can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., and the embodiment of the present application is not specifically limited.

[0081] The power supply adjustment device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0082] The power supply adjustment device provided in the embodiment of the present application can achieve Figure 7 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0083] Alternatively, if Fig. 9As shown, an embodiment of the present application also provides an electronic device 1100, including a processor 1101 and a memory 1102, and the memory 1102 stores a program or instruction that can be executed on the processor 101. When the program or instruction is executed by the processor 1101, the various steps of the above-mentioned power supply adjustment method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0084] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0085] Fig.10 A schematic diagram of the hardware structure of an electronic device for implementing an embodiment of the present application. The electronic device 1200 may be an electronic device provided in an embodiment of the present application. In addition, the electronic device may also include, but is not limited to, components such as a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, and a processor 1210.

[0086] Those skilled in the art will appreciate that the electronic device 1200 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1210 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.10 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0087] The processor 1210 is used to obtain the power of an external power source connected to the power supply end of the microphone; when the power is lower than the target power threshold, the energy storage device and the power supply end are controlled to be turned on.

[0088] In an embodiment of the present application, the microphone can convert sound waves into a second electrical signal through an acoustic-electric conversion device to store it in an energy storage device, so that the energy storage device can power the microphone. In this way, when the microphone is in a working scenario such as a call or recording for a long time, the energy storage device can be effectively used to power the microphone, reducing the power supply time of the external power supply to the microphone and increasing the power supply time of the external power supply. In the case where the microphone is set in an electronic device, using the energy storage device to power the microphone can reduce the power supply time of the electronic device to the microphone, and increase the use time of the electronic device.

[0089] It should be understood that in the embodiment of the present application, the input unit 1204 may include a graphics processor (Graphics Processing Unit, GPU) 12041 and a microphone 12042, and the graphics processor 12041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1206 may include a display panel 12061, and the display panel 12061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1207 includes a touch panel 12071 and at least one of other input devices 12072. The touch panel 12071 is also called a touch screen. The touch panel 12071 may include two parts: a touch detection device and a touch controller. Other input devices 12072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0090] The memory 1209 can be used to store software programs and various data. The memory 1209 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1209 may include a volatile memory or a non-volatile memory, or the memory 1209 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1209 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0091] The processor 1210 may include one or more processing units; optionally, the processor 1210 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1210.

[0092] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned power supply adjustment method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0093] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0094] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned power supply adjustment method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0095] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0096] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned power supply adjustment method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0097] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0098] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0099] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A microphone, characterized in that: The microphone comprises: a housing, a carrier board, an energy storage device, a sound pickup device and at least one sound-to-electricity conversion device; The shell is connected with the carrier to form a first cavity, the cavity wall of the first cavity has a sound pickup hole, and the energy storage device, the sound pickup device and the sound-to-electric conversion device are all arranged in the first cavity; The sound pickup device comprises a first back pole and a first diaphragm, the first back pole is connected to the first diaphragm to form a second cavity, the back pole hole of the first back pole connects the sound pickup hole and the second cavity, the sound pickup device is used to collect the sound waves transmitted to the second cavity through the sound pickup hole, and convert them into a first electrical signal to output to the outside of the microphone; The acoustic-to-electric conversion device comprises a second back pole and a second diaphragm, the second back pole and the second diaphragm are connected to form a third cavity, the back pole hole of the second back pole connects the sound pickup hole and the third cavity, and the acoustic-to-electric conversion device is used to collect the sound waves transmitted to the third cavity through the sound pickup hole, and convert them into second electrical signals to transmit to the energy storage device; The energy storage device is used to supply power to the microphone.

2. The microphone according to claim 1, characterized in that The first back pole and the second back pole are the same back pole, the first diaphragm is located in the third cavity, and the first diaphragm has a diaphragm air leakage hole, When the number of the acoustic-to-electric conversion device is one, the diaphragm air leakage hole and the back pole hole are connected to the third cavity, the second cavity and the sound pickup hole of the acoustic-to-electric conversion device; When the number of the acoustic-to-electric conversion devices is at least two, the acoustic-to-electric conversion devices are nested, each of the second diaphragms has the diaphragm air bleed hole, and a plurality of the diaphragm air bleed holes and the back pole hole connect the third cavity, the second cavity and the pickup hole of each of the acoustic-to-electric conversion devices.

3. The microphone according to claim 2, characterized in that The diaphragm air leakage hole of the first diaphragm is staggered with the back pole hole, and when there are at least two acoustic-to-electric conversion devices, the diaphragm air leakage holes of any two adjacent second diaphragms are staggered.

4. The microphone according to claim 1, characterized in that The volume of the third cavity is greater than the volume of the second cavity.

5. The microphone according to claim 4, characterized in that The projection area of ​​the second diaphragm on the second back pole is larger than the target projection area, and the target projection area is the projection area of ​​the first diaphragm on the first back pole, And / or, the distance between the second diaphragm and the second back pole is greater than the distance between the first diaphragm and the first back pole.

6. The microphone according to claim 5, characterized in that The first cavity includes a plurality of inner wall surfaces; the sound pickup device is arranged on the first inner wall surface, and the first inner wall surface has the sound pickup hole communicating with the second cavity; The acoustic-to-electric conversion device is disposed on a second inner wall surface, and the second inner wall surface has the sound pickup hole connected to the third cavity, and the first inner wall surface and the second inner wall surface are different inner wall surfaces among the multiple inner wall surfaces.

7. The microphone according to claim 1, characterized in that The sound pickup device comprises a first base, wherein the first base and the first back pole are stacked on one side of the carrier, and the first base has a hollow area, and the back pole hole of the first back pole is connected with the sound pickup hole through the hollow area of ​​the first base; The acoustic-to-electric conversion device includes a second base, the second base and the second back pole are stacked on one side of the carrier, and the second base has a hollow area, and the back pole hole of the second back pole is connected to the sound pickup hole through the hollow area of ​​the second base.

8. The microphone according to claim 1, characterized in that The energy storage device is also used to supply power to the microphone when the power level of the external power source of the microphone is lower than a target power threshold.

9. The microphone according to claim 1, characterized in that The microphone further comprises: a chip; the sound-to-electric conversion device is further used to transmit the second electrical signal to the chip; The chip is also used to perform analog-to-digital conversion sampling processing on the second electrical signal to obtain the processed second electrical signal, filter the processed second electrical signal to obtain the filtered second electrical signal, amplify the filtered second electrical signal to obtain the amplified second electrical signal, and transmit the amplified second electrical signal to the energy storage device.

10. An electronic device, characterized in that: The electronic device comprises the microphone according to any one of claims 1 to 9.

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