Mute circuit for remote controller, control method and air conditioner remote controller

Abstract

The present invention relates to the field of remote controllers, and provides a silencing circuit for a remote controller, a control method, and an air conditioner remote controller. The silencing circuit for the remote controller includes: a main control module and an audio power amplifier module. The main control module is connected to the audio input end of the audio power amplifier module, and the audio output end of the audio power amplifier module is used to be connected to a speaker; a power supply control module, the main control module is connected to the controlled end of the power supply control module, the input end of the power supply control module is connected to a power supply source, and the output end of the power supply control module is connected to the power supply end of the audio power amplifier module; a delay start module, which is connected to the audio power amplifier module, and when the audio power amplifier module obtains power supply, the delay start module is used to make the audio power amplifier module start after a preset delay time. Through the power supply control module and the delay start module, double protection for silencing is achieved, which is beneficial to avoiding popping sounds during the power-on and power-off processes, improving the stability of the circuit and the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of remote controllers, and particularly to a silencing circuit for a remote controller, a control method, and an air conditioner remote controller. Background Art

[0002] A remote controller is used to control a device according to a user's input operation. With the development of technology, a user can perform an input operation on the remote controller by voice, and the remote controller also interacts with the user by voice playback to implement the function of voice control, making the use more convenient.

[0003] However, in the prior art, during the power-on and power-off processes of the remote controller, popping sounds are likely to occur, resulting in noise that affects the user experience. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the related art. For this purpose, the present invention provides a silencing circuit for a remote controller, which avoids generating popping sounds during the power-on and power-off processes, and improves the stability of the circuit and the user experience.

[0005] The present invention also provides a control method and an air conditioner remote controller.

[0006] A silencing circuit for a remote controller according to an embodiment of the first aspect of the present invention includes:

[0007] A main control module and an audio power amplifier module, where the main control module is connected to the audio input end of the audio power amplifier module, and the audio output end of the audio power amplifier module is used to be connected to a speaker;

[0008] A power supply control module, where the main control module is connected to the controlled end of the power supply control module, the input end of the power supply control module is connected to a power source, and the output end of the power supply control module is connected to the power supply end of the audio power amplifier module;

[0009] A delay start module, connected to the audio power amplifier module, and when the audio power amplifier module obtains power supply, the delay start module is used to cause the audio power amplifier module to start after a preset delay time.

[0010] According to the mute circuit of the remote controller in the embodiments of the present invention, the main control module controls the power supply of the audio power amplifier module through the power supply control module, ensuring that the power-on timing of the audio power amplifier module is after the main control module, and the power-off timing of the audio power amplifier module is before the main control module. This is beneficial to avoiding the electrical signals generated during the power-on and power-off processes of the main control module from causing the audio power amplifier module to drive the speaker to produce popping sounds. At the same time, the delay start module makes the audio power amplifier module need a preset delay time to complete startup after obtaining power supply, ensuring that the impedance components of the circuit have completed charging when the audio power amplifier module is working stably, and avoiding the interference caused by the power supply voltage fluctuation and the impedance components' power-on from causing the audio power amplifier module to drive the speaker to produce popping. Through the power supply control module and the delay start module, double protection for muting is achieved, which is beneficial to avoiding the generation of popping sounds during the power-on and power-off processes, improving the stability of the circuit and the user experience.

[0011] According to an embodiment of the present invention, it further includes a circuit board. The main control module and the audio power amplifier module are both arranged on the circuit board. The audio power amplifier module is provided with a first audio input terminal and a second audio input terminal. The circuit board is provided with a first audio trace and a second audio trace. The first audio input terminal is connected to the main control module through the first audio trace. The second audio input terminal is connected to the main control module or grounded through the second audio trace. The first audio trace and the second audio trace are arranged in parallel.

[0012] By arranging the first audio trace and the second audio trace in a parallel and parallel-wiring manner, when affected by interference signals, the signal interference changes of the first audio trace and the second audio trace are the same, that is, the interference received by the first audio trace and the second audio trace is common-mode interference. When the audio power amplifier module subtracts the voltages of the first audio input terminal and the second audio input terminal later, the common-mode interference can be eliminated. The audio signal determined according to the voltage difference can reduce the influence of the interference signal and improve the common-mode anti-interference ability, thereby avoiding the popping sound caused by weak anti-interference ability.

[0013] According to an embodiment of the present invention, the audio power amplifier module includes an audio input unit, an amplification unit, and an audio output unit connected in sequence. The main control module is connected to the audio input unit. The audio output unit is used to be connected to the speaker. The amplification unit is provided with a bypass terminal. The delay start module includes a delay capacitor. One end of the delay capacitor is connected to the bypass terminal, and the other end of the delay capacitor is grounded. The preset delay time is determined by the capacitance value of the delay capacitor.

[0014] According to an embodiment of the present invention, the audio input unit includes a first input capacitor, a first input resistor, a second input capacitor, and a second input resistor. The amplification unit is provided with a first amplification input terminal and a second amplification input terminal. One end of the first input resistor is connected to the first amplification input terminal, the other end of the first input resistor is connected to one end of the first input capacitor, the other end of the first input capacitor is connected to the main control module, one end of the second input resistor is connected to the second amplification input terminal, the other end of the second input resistor is connected to one end of the second input capacitor, and the other end of the second input capacitor is connected to the main control module or grounded.

[0015] According to an embodiment of the present invention, the audio input unit further includes a first filter capacitor and a first filter resistor. The other end of the first input capacitor is respectively connected to the main control module and one end of the first filter capacitor. The other end of the first filter capacitor is connected to one end of the first filter resistor, and the other end of the first filter resistor is grounded.

[0016] According to an embodiment of the present invention, the audio output unit includes a first output resistor, a second output resistor, a first output capacitor, and a second output capacitor. The amplification unit is provided with a first amplification output terminal and a second amplification output terminal. One end of the first output resistor is connected to the first amplification output terminal, the other end of the first output resistor is connected to one end of the first output capacitor, one end of the second output resistor is connected to the second amplification output terminal, the other end of the second output resistor is connected to one end of the second output capacitor, the other ends of the first output capacitor and the second output capacitor are grounded, and the other ends of the first output resistor and the second output resistor are both used to connect to a speaker.

[0017] According to an embodiment of the present invention, the power supply control module includes a first switching tube, a second switching tube, a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, and a fourth voltage dividing resistor. One end of the first voltage dividing resistor is connected to the main control module, the other end of the first voltage dividing resistor is respectively connected to one end of the second voltage dividing resistor and the controlled end of the first switching tube. The input end of the first switching tube is connected to one end of the third voltage dividing resistor, the other end of the second voltage dividing resistor and the output end of the first switching tube are grounded. One end of the third voltage dividing resistor is respectively connected to one end of the fourth voltage dividing resistor and the controlled end of the second switching tube. The other end of the fourth voltage dividing resistor is respectively connected to the input end of the second switching tube and a power supply, and the output end of the second switching tube is connected to the power supply terminal of the audio power amplifier module.

[0018] A control method according to an embodiment of the second aspect of the present invention is applied to the main control module included in the above-mentioned mute circuit of the remote controller. The main control module is connected to the enable terminal of the audio power amplifier module. The control method includes:

[0019] After power-on startup, a power supply control signal is generated and transmitted to the power supply control module to enable the audio power amplifier module to obtain power supply;

[0020] When outputting an audio signal, an audio enable signal is generated and transmitted to the enable terminal of the audio power amplifier module, and the audio enable signal is revoked after the audio signal output is completed.

[0021] According to the control method of the embodiment of the present invention, after the main control module is powered on, by generating a power supply control signal and transmitting it to the controlled terminal of the power supply control module, the power supply source can supply power to the audio power amplifier module through the power supply control module. In this way, it is ensured that the power-on timing of the audio power amplifier module is after the main control module, which is beneficial to avoiding the generation of popping sounds caused by the electrical signals generated during the power-on process of the main control module driving the speaker by the audio power amplifier module. The main control module is connected to the enable terminal of the audio power amplifier module. When the main control module is powered on and enters the stable working state, when voice interaction is required to output an audio signal, the main control module synchronously generates an audio enable signal and transmits it to the enable terminal of the audio power amplifier module, so that the audio power amplifier module works normally, amplifies the input audio signal and transmits it to the speaker for playback. After the main control module finishes outputting the audio signal, the audio enable signal is revoked, so that the audio power amplifier module stops working. In this way, when the main control module does not output an audio signal, the audio power amplifier module stops working, avoiding the introduction of interference caused by voltage changes or impedance changes in the external circuit during audio playback and resulting in noise, which is beneficial to improving the stability of the circuit and the user experience.

[0022] An air conditioner remote controller according to an embodiment of the third aspect of the present invention includes a remote controller body. The remote controller body includes the above-mentioned mute circuit of the remote controller. The remote controller body further includes a speaker. The output terminal of the audio power amplifier module is connected to the speaker, and the main control module is used to connect to the air conditioner device.

[0023] The air conditioner remote controller according to the present invention can avoid generating popping sounds during the power-on and power-off processes, improving the stability of the circuit and the user experience.

[0024] According to an embodiment of the present invention, the main control module executes the above control method.

[0025] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the related art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the related art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0027] Figure 1 is a schematic structural diagram of the silencing circuit of the remote controller provided by the present invention;

[0028] Figure 2 is a circuit diagram of the audio power amplifier module and the delay start module in one implementation of the silencing circuit of the remote controller provided by the present invention;

[0029] Figure 3 is a circuit diagram of the power supply control module in one implementation of the silencing circuit of the remote controller provided by the present invention;

[0030] Figure 4 is a schematic diagram of the first audio trace and the second audio trace on the circuit board in one implementation of the silencing circuit of the remote controller provided by the present invention.

[0031] Reference numerals:

[0032] 100: main control module; 200: audio power amplifier module; 210: audio input unit; 211: first input capacitor; 212: first input resistor; 213: second input capacitor; 214: second input resistor; 220: amplification unit; 230: audio output unit; 231: first output resistor; 232: second output resistor; 233: first output capacitor; 234: second output capacitor; 300: power supply control module; 310: first switching tube; 320: second switching tube; 330: first voltage dividing resistor; 340: second voltage dividing resistor; 350: third voltage dividing resistor; 360: fourth voltage dividing resistor; 400: delay start module; 500: circuit board; 510: first audio trace; 520: second audio trace; 600: speaker. Specific embodiments

[0033] The following will further describe in detail the embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0034] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0038] During the power-on and power-off processes of the remote controller, the generation of popping sounds is mainly caused by the following factors:

[0039] 1. During power-on and power-off, popping sounds are generated due to improper startup timing of components. When the circuit is powered on but has not entered a stable startup state, if the audio power amplifier enters a stable startup state before other components, the electrical signals generated when the components in the circuit are powered on may cause the audio power amplifier to drive the speaker and produce popping sounds. During power-off, the audio power amplifier powers off after other components, and the electrical signals generated when the components in the circuit are powered off may cause the audio power amplifier to drive the speaker and produce popping sounds;

[0040] 2. Popping sounds are caused by power supply fluctuations or signal interference, etc.;

[0041] 3. The anti-interference ability of the input end of the audio power amplifier is weak.

[0042] To solve the problem of popping sounds generated during the power-on and power-off processes of the remote controller, referring to Figures 1 to 3 , the present invention provides a silencing circuit for the remote controller, including:

[0043] A main control module 100 and an audio power amplifier module 200. The main control module 100 is connected to the audio input end of the audio power amplifier module 200, and the audio output end of the audio power amplifier module 200 is used to connect to a speaker 600;

[0044] A power supply control module 300. The main control module 100 is connected to the controlled end of the power supply control module 300. The input end of the power supply control module 300 is connected to the power supply, and the output end of the power supply control module 300 is connected to the power supply end of the audio power amplifier module 200;

[0045] A delay startup module 400, which is connected to the audio power amplifier module 200. When the audio power amplifier module 200 obtains power supply, the delay startup module 400 is used to make the audio power amplifier module 200 start after a preset delay time.

[0046] During power-on, the power supply control module 300 supplies power to the audio power amplifier module 200 under the control of the main control module 100, which means that after the main control module 100 completes startup during power-on, the audio power amplifier module 200 starts to obtain power supply, ensuring that the main control module 100 completes power-on before the audio power amplifier module 200. And because the power supply of the audio power amplifier module 200 by the power supply control module 300 requires the signal of the main control module 100 to maintain, during power-off, the audio power amplifier module 200 will power off before the main control module 100. After the audio power amplifier module 200 obtains power supply, the delay startup module 400 makes the audio power amplifier module 200 need to go through a preset delay time to complete startup, so that after other impedance components in the circuit are charged, the audio power amplifier module 200 starts to work. Under the control of the main control module 100, the audio power amplifier module 200 amplifies the input audio so that the speaker 600 plays the audio.

[0047] In this way, the main control module 100 controls the power supply of the audio power amplifier module 200 through the power supply control module 300, ensuring that the power-on timing of the audio power amplifier module 200 is after that of the main control module 100, and the power-off timing of the audio power amplifier module 200 is prior to that of the main control module 100. This helps to avoid the generation of electrical signals during the power-on and power-off processes of the main control module 100, which could cause the audio power amplifier module 200 to drive the speaker 600 to produce popping sounds. At the same time, the delay start module 400 causes the audio power amplifier module 200 to take a preset delay time to complete startup after obtaining power supply, ensuring that the impedance components in the circuit have completed charging when the audio power amplifier module 200 is in a stable working state, and avoiding interference caused by power supply fluctuations and impedance component power-on, which could cause the audio power amplifier module 200 to drive the speaker 600 to produce popping sounds. Through the power supply control module 300 and the delay start module 400, double protection against popping sounds is achieved, which helps to avoid the generation of popping sounds during the power-on and power-off processes, improving the stability of the circuit and the user experience.

[0048] It can be understood that capacitors and inductors are commonly used components in a circuit. The impedance network formed by them has a charging process when powered on. The delay start module 400 causes the audio power amplifier module 200 to start after a preset delay time. The preset delay time can be determined according to the charging time of the impedance network formed by capacitors, inductors, and resistors in the circuit, and the preset delay time is greater than the charging time of the impedance network. When the audio power amplifier module 200 completes startup and enters a stable working state, the impedance network in the circuit has completed charging and entered a stable working state, ensuring that when the audio power amplifier module 200 is in a stable working state, the power supply is stable and the impedance network will not generate interference signals due to charging, thus avoiding the audio power amplifier module 200 from amplifying interference signals and causing popping sounds.

[0049] In a normal stable working state, the main control module 100 can generate an audio signal and transmit it to the audio power amplifier module 200, so that the audio power amplifier module 200 can amplify the audio signal, and the amplified audio signal can drive the speaker 600 to play, achieving the effect of voice playback interaction.

[0050] The main control module 100 can be connected to the enable terminal of the audio power amplifier module 200. The main control module 100 controls the level of the enable terminal of the audio power amplifier module 200 to control whether the audio power amplifier module 200 works to amplify the audio signal and output the amplified audio signal.

[0051] In some embodiments of the present invention, the main control module 100 may be implemented by devices including a single-chip microcomputer, an embedded chip, etc. It should be noted that usually the capacitance of the circuit in the circuit is relatively large. When the power is turned off, the electric energy stored in the capacitor can supply the main control module 100 to continue running for a certain period of time, so that the main control module 100 can save key data and control the audio power amplifier module 200 to power off first through the power supply control module 300.

[0052] Refer to Figure 2 and Figure 4 , in some embodiments of the mute circuit of the line controller of the present invention, a circuit board 500 is further included. The main control module 100 and the audio power amplifier module 200 are both disposed on the circuit board 500. The audio power amplifier module 200 is provided with a first audio input terminal and a second audio input terminal. The circuit board 500 is provided with a first audio trace 510 and a second audio trace 520. The first audio input terminal is connected to the main control module 100 through the first audio trace 510. The second audio input terminal is connected to the main control module 100 or grounded through the second audio trace 520. The first audio trace 510 and the second audio trace 520 are arranged in parallel.

[0053] In the actual trace layout of the circuit board 500, the first audio input terminal of the audio power amplifier module 200 is connected to the main control module 100 through the first audio trace 510. The second audio input terminal of the audio power amplifier module 200 is connected to the main control module 100 or grounded through the second audio trace 520. The audio power amplifier module 200 determines the audio signal according to the voltage difference between the first audio input terminal and the second audio input terminal. By arranging the first audio trace 510 and the second audio trace 520 in a parallel and parallel trace manner, when affected by interference signals, the signal interference received by the first audio trace 510 and the second audio trace 520 changes in the same way, that is, the interference received by the first audio trace 510 and the second audio trace 520 is common-mode interference. When the audio power amplifier module 200 subtracts the voltages of the first audio input terminal and the second audio input terminal later, the common-mode interference can be eliminated, and the audio signal determined according to the voltage difference can reduce the influence of the interference signal and improve the common-mode anti-interference ability, thereby avoiding popping sounds caused by weak anti-interference ability.

[0054] The structure in which the first audio trace 510 and the second audio trace 520 are arranged in parallel can achieve the effect of differential-like traces, so that when the two are affected by interference during signal transmission, the changes in the transmitted signals caused by the interference can be considered the same, and then the changes caused by the interference can be eliminated by taking the difference.

[0055] In some embodiments of the present invention, refer to Figure 2, the second audio input terminal is grounded, that is, a single - ended audio input mode is adopted, and the structure is simple and easy to implement. In some other embodiments of the present invention, the second audio input terminal can be connected to the main control module 100, that is, both the first audio input terminal and the second audio input terminal are connected to the main control module 100. At this time, the main control module 100 is provided with a first audio terminal corresponding to the first audio input terminal and a second audio terminal corresponding to the second audio input terminal. When the main control module 100 outputs an audio signal, differential signals are output at the first audio terminal and the second audio terminal, so as to further improve the anti - interference ability by using the differential signals.

[0056] Reference Figure 2 , in some embodiments of the mute circuit of the line controller of the present invention, the audio power amplifier module 200 includes an audio input unit 210, an amplification unit 220, and an audio output unit 230 connected in sequence. The main control module 100 is connected to the audio input unit 210, and the audio output unit 230 is used to be connected to the speaker 600. The amplification unit 220 is provided with a bypass terminal. The delay start module 400 includes a delay capacitor C59. One end of the delay capacitor C59 is connected to the bypass terminal, and the other end of the delay capacitor C59 is grounded. The preset delay time is determined by the capacitance value of the delay capacitor C59.

[0057] The main control module 100 generates an audio signal, which is transmitted to the amplification unit 220 through the audio input unit 210 for amplification. The amplified audio signal is transmitted to the speaker 600 through the audio output unit 230 for playback. The delay start module 400 includes a delay capacitor C59. By connecting the delay capacitor C59 to the bypass terminal of the amplification unit 220, when the amplification unit 220 is powered on, the delay capacitor C59 connected to the bypass terminal starts to charge, and the charging process takes a certain amount of time, so that the bias voltage rises from 0V to the rated stable voltage to make the amplification unit 220 work normally. Before the delay capacitor C59 is charged to the stable voltage, the amplification unit 220 will not be fully started, avoiding pop - up noise when powered on. By adjusting the capacitance value of the delay capacitor C59, the charging time of the delay capacitor C59, that is, the preset delay time, can be controlled, so as to accurately control the start - up delay of the amplification unit 220, making the amplification unit 220 start and work stably after the external impedance network is charged. In this way, by connecting the delay capacitor C59 to the bypass terminal of the amplification unit 220 and setting the capacitance value of the delay capacitor C59, the control of the amplification unit 220 is realized, that is, the control of the audio power amplifier module 200 to start after a preset delay time, and the structure is simple and easy to implement.

[0058] In some embodiments of the present invention, the delay start module 400 may also be an implementation including devices or circuits such as a delay circuit and a timing circuit, to enable the audio power amplifier module 200 to start after a preset time. In some embodiments of the present invention, the amplification unit 220 may be an implementation including devices or circuits such as an audio amplification chip and an audio amplification circuit.

[0059] It can be understood that the output end of the power supply control module 300 is connected to the power supply end of the amplification unit 220. The audio input unit 210 includes a first audio input end and a second audio input end.

[0060] Reference Figure 2 , in some embodiments of the silencing circuit of the wire controller of the present invention, the audio input unit 210 includes a first input capacitor 211, a first input resistor 212, a second input capacitor 213, and a second input resistor 214. The amplification unit 220 is provided with a first amplification input end INN and a second amplification input end INP. The first amplification input end INN is connected to one end of the first input resistor 212, the other end of the first input resistor 212 is connected to one end of the first input capacitor 211, the other end of the first input capacitor 211 is connected to the main control module 100, the second amplification input end INP is connected to one end of the second input resistor 214, the other end of the second input resistor 214 is connected to one end of the second input capacitor 213, and the other end of the second input capacitor 213 is connected to the main control module 100 or grounded.

[0061] Since the audio signal focuses on the changing part of the audio, that is, the AC part of the signal, and pays little attention to the DC part, the first input capacitor 211 is used to isolate the DC part of the audio signal transmitted to the first amplification input end INN, avoiding the DC part from affecting the operating point of the amplification unit 220 and causing amplification distortion, which is beneficial to improving the reliability of the amplification process of the amplification unit 220. At the same time, the first input capacitor 211 and the first input resistor 212 can match the input impedance, that is, achieve impedance matching with the previous stage, which is beneficial to avoiding signal reflection and distortion. Similarly, the second input capacitor 213 and the second input resistor 214 can also play the role of isolating the DC part of the signal and can achieve the role of impedance matching when the second audio input end is not grounded.

[0062] It should be noted that the other end of the first input capacitor 211 forms the first audio input end, and the other end of the second input capacitor 213 forms the second audio input end.

[0063] It should be emphasized that the audio input unit 210 adopts a symmetric device structure at the first audio input terminal and the second audio input terminal, that is, the structures of the first input capacitor 211 and the first input resistor 212 are symmetric with the structures of the second input capacitor 213 and the second input resistor 214, and further adapt to the structure arranged in parallel with the first audio trace 510 and the second audio trace 520, so that the voltage signals finally transmitted to the first amplification input terminal INN and the second amplification input terminal INP of the amplification unit 220 pass through parallel paths and the same device structure. Furthermore, when the amplification unit 220 determines the audio signal according to the voltage difference between the first amplification input terminal INN and the second amplification input terminal INP, common-mode interference can be eliminated.

[0064] Reference Figure 2 , in some embodiments of the mute circuit of the wired controller of the present invention, the audio input unit 210 further includes a first filter capacitor C55 and a first filter resistor R35. The other end of the first input capacitor 211 is respectively connected to the main control module 100 and one end of the first filter capacitor C55. The other end of the first filter capacitor C55 is connected to one end of the first filter resistor R35, and the other end of the first filter resistor R35 is grounded.

[0065] When the second audio input terminal is grounded, that is, in the case of single-ended audio input, a filter circuit is formed by the series connection of the first filter capacitor C55 and the first filter resistor R35. The filter circuit filters the input signal of the first audio input terminal, which is beneficial to filtering out interference signals such as noise and improving audio performance.

[0066] In some embodiments of the present invention, when the second audio input terminal is also connected to the main control module 100, the audio input unit 210 may also include a second filter capacitor and a second filter resistor. The other end of the second input capacitor 213 is respectively connected to the main control module 100 and one end of the second filter capacitor. The other end of the second filter capacitor is connected to one end of the second filter resistor, and the other end of the second filter resistor is grounded.

[0067] Reference Figure 2, in some embodiments of the silencing circuit of the present invention's remote controller, the audio output unit 230 includes a first output resistor 231, a second output resistor 232, a first output capacitor 233, and a second output capacitor 234. The amplification unit 220 is provided with a first amplified output terminal VOP and a second amplified output terminal VON. The first amplified output terminal VOP is connected to one end of the first output resistor 231, the other end of the first output resistor 231 is connected to one end of the first output capacitor 233, the second amplified output terminal VON is connected to one end of the second output resistor 232, the other end of the second output resistor 232 is connected to one end of the second output capacitor 234, the other ends of the first output capacitor 233 and the second output capacitor 234 are grounded, and the other ends of the first output resistor 231 and the second output resistor 232 are both used to connect to the speaker 600.

[0068] The amplification unit 220 is provided with a first amplified output terminal VOP and a second amplified output terminal VON, and outputs the amplified audio signal in a differential output manner, which is beneficial to improving the anti-interference performance. A filter circuit is formed by the first output resistor 231 and the first output capacitor 233 and connected to the first amplified output terminal VOP to filter out interference parts such as noise. Similarly, a filter circuit is formed by the second output resistor 232 and the second output capacitor 234 and connected to the second amplified output terminal VON, which can also filter out interference parts such as noise, and is beneficial to improving the playback effect of the final speaker 600.

[0069] It can be understood that the effective part in the audio is usually the signal part below twenty thousand hertz. The too-high frequency part may be caused by noise interference. Therefore, the too-high frequency part is filtered out to avoid affecting the working performance of the speaker 600.

[0070] Reference Figure 2 , in some embodiments of the silencing circuit of the present invention's remote controller, the audio output unit 230 further includes a first voltage clamping unit and a second voltage clamping unit. The first voltage clamping unit is connected to the first amplified output terminal VOP, and the second voltage clamping unit is connected to the second amplified output terminal VON.

[0071] By providing the first voltage clamping unit and the second voltage clamping unit, the output voltage can be controlled below the preset voltage limit value, avoiding too high output voltage, which is beneficial to protecting the speaker 600 and improving the stability of the circuit.

[0072] The first voltage clamping unit and the second voltage clamping unit can be an implementation manner including two zener diodes connected in reverse series. For example, Figure 2 D23 and D24 in use the voltage stabilizing characteristics of the zener diode to keep the voltage at the voltage stabilizing value of the zener diode when the voltage is too large, achieving the effect of voltage clamping.

[0073] ReferenceFigure 3 , in some embodiments of the silencing circuit of the remote controller according to the present invention, the power supply control module 300 includes a first switching transistor 310, a second switching transistor 320, a first voltage dividing resistor 330, a second voltage dividing resistor 340, a third voltage dividing resistor 350, and a fourth voltage dividing resistor 360. One end of the first voltage dividing resistor 330 is connected to the main control module 100, and the other end of the first voltage dividing resistor 330 is respectively connected to one end of the second voltage dividing resistor 340 and the controlled end of the first switching transistor 310. The input end of the first switching transistor 310 is connected to one end of the third voltage dividing resistor 350. The other end of the second voltage dividing resistor 340 and the output end of the first switching transistor 310 are grounded. The other end of the third voltage dividing resistor 350 is respectively connected to one end of the fourth voltage dividing resistor 360 and the controlled end of the second switching transistor 320. The other end of the fourth voltage dividing resistor 360 is respectively connected to the input end of the second switching transistor 320 and the power supply. The output end of the second switching transistor 320 is connected to the power supply terminal of the audio power amplifier module 200.

[0074] After the main control module 100 is powered on and starts up successfully, the main control module 100 controls the terminal voltage connected to the first voltage dividing resistor 330, so that after the terminal voltage is divided by the first voltage dividing resistor 330 and the second voltage dividing resistor 340, an electric signal is formed and transmitted to the controlled end of the first switching transistor 310, so that the first switching transistor 310 is turned on. After the first switching transistor 310 is turned on, the voltage of the power supply is divided by the third voltage dividing resistor 350 and the fourth voltage dividing resistor 360, and a voltage for driving the second switching transistor 320 to turn on is formed at the controlled end of the second switching transistor 320. Then, the power supply outputs electric energy to the power supply terminal of the audio power amplifier module 200 through the turned-on second switching transistor 320. In this way, the main control module 100 realizes the power supply control of the audio power amplifier module 200, and the structure is simple and easy to implement.

[0075] The control method provided by the present invention is described below. The control method can be referred to and corresponding to the above-mentioned silencing circuit of the remote controller, and will not be elaborated here.

[0076] The present invention also provides a control method, which is applied to the main control module 100 included in the above-mentioned silencing circuit of the remote controller. The main control module 100 is connected to the enable terminal of the audio power amplifier module 200. The control method includes:

[0077] After power-on startup, a power supply control signal is generated and transmitted to the power supply control module 300 to enable the audio power amplifier module 200 to obtain power supply;

[0078] When outputting an audio signal, an audio enable signal is generated and transmitted to the enable terminal of the audio power amplifier module 200, and the audio enable signal is cancelled after the audio signal output is completed.

[0079] After the main control module 100 is powered on, the main control module 100 transmits a power supply control signal to the controlled end of the power supply control module 300, so that the power supply can supply power to the audio power amplifier module 200 through the power supply control module 300. In this way, it is ensured that the power-on sequence of the audio power amplifier module 200 is after the main control module 100, which is beneficial to avoiding the electrical signal generated during the power-on process of the main control module 100 from causing the audio power amplifier module 200 to drive the speaker 600 to produce popping sounds.

[0080] The main control module 100 is connected to the enable end of the audio power amplifier module 200. When the main control module 100 is powered on and enters the stable working state, when it is necessary to perform voice interaction and output an audio signal, the main control module 100 synchronously generates an audio enable signal and transmits it to the enable end of the audio power amplifier module 200, so that the audio power amplifier module 200 can work normally, amplify the input audio signal and then transmit it to the speaker 600 for playback. After the main control module 100 finishes outputting the audio signal, the audio enable signal is cancelled, so that the audio power amplifier module 200 stops working. In this way, when the main control module 100 does not output an audio signal, the audio power amplifier module 200 stops working, avoiding the interference caused by the voltage change or impedance change of the external circuit during non-audio playback and resulting in noise, which is beneficial to improving the stability of the circuit and the user experience.

[0081] It can be understood that in the embodiment where the audio power amplifier module 200 includes the amplification unit 220, the enable end of the audio power amplifier module 200 is the enable end of the amplification unit 220.

[0082] In some embodiments of the present invention, when powering off, the main control module 100 generates a power-off control signal and transmits it to the power supply control module 300 to power off the audio power amplifier module 200. In this way, the audio power amplifier module 200 is powered off prior to the main control module 100, which is beneficial to avoiding the electrical signal generated during the power-off process of the main control module 100 from causing the audio power amplifier module 200 to drive the speaker 600 to produce popping sounds.

[0083] The present invention also provides an air conditioner remote controller, including a remote controller body. The remote controller body includes the above-mentioned remote controller silencing circuit. The remote controller body further includes a speaker 600. The output end of the audio power amplifier module 200 is connected to the speaker 600, and the main control module 100 is used to connect to the air conditioner device.

[0084] When the body of the remote controller is powered on, the power supply control module 300 allows the power supply to supply power to the audio power amplifier module 200 only under the control of the main control module 100, which means that after the main control module 100 completes power-on and startup, the audio power amplifier module 200 starts to obtain power supply, ensuring that the main control module 100 completes power-on before the audio power amplifier module 200. And because the power supply of the audio power amplifier module 200 by the power supply control module 300 requires the signal of the main control module 100 to maintain, when powering off, the audio power amplifier module 200 will power off before the main control module 100. After the audio power amplifier module 200 obtains power supply, the delay start module 400 makes the audio power amplifier module 200 need to go through a preset delay time to complete startup, so that after other impedance devices in the circuit complete charging, the audio power amplifier module 200 starts to work. Under the control of the main control module 100, the audio power amplifier module 200 amplifies the input audio so that the speaker 600 plays the audio.

[0085] In this way, the main control module 100 controls the power supply of the audio power amplifier module 200 through the power supply control module 300, ensuring that the power-on timing of the audio power amplifier module 200 is after the main control module 100, and the power-off timing of the audio power amplifier module 200 is before the main control module 100, which is beneficial to avoiding the generation of electrical signals during the power-on and power-off processes of the main control module 100, causing the audio power amplifier module 200 to drive the speaker 600 to generate popping sounds. At the same time, the delay start module 400 makes the audio power amplifier module 200 need a preset delay time to complete startup after obtaining power supply, ensuring that the impedance devices in the circuit have completed charging when the audio power amplifier module 200 works stably, and avoiding the interference caused by power supply fluctuations and the power-on of impedance devices, causing the audio power amplifier module 200 to drive the speaker 600 to generate popping. Through the power supply control module 300 and the delay start module 400, double protection against noise is realized, which is beneficial to avoiding the generation of popping sounds during the power-on and power-off processes, improving the stability of the circuit and the user experience.

[0086] In some embodiments of the present invention, the body of the remote controller is further provided with a pickup connected to the main control module. The main control module 100 obtains the voice commands of the user through the pickup to generate control commands and transmits them to the connected air-conditioning equipment to realize voice control of the air-conditioning equipment.

[0087] It can be understood that operation keys such as buttons and knobs can also be provided on the body of the remote controller for the user to generate control commands through manual operations.

[0088] In some embodiments of the present invention, the body of the remote controller is further provided with a display screen connected to the main control module 100. Under the control of the main control module 100, the display screen displays information such as the operating parameters of the air conditioner, facilitating the user to understand the operating conditions of the air conditioner for further interactive control.

[0089] In some embodiments of the air conditioner remote controller provided by the present invention, the main control module 100 in the remote controller body executes the above control method.

[0090] After the main control module 100 is powered on, the main control module 100 transmits a power supply control signal to the controlled end of the power supply control module 300, so that the power supply can supply power to the audio power amplifier module 200 through the power supply control module 300. In this way, it is ensured that the power-on timing of the audio power amplifier module 200 is after the main control module 100, which is beneficial to avoiding the generation of electrical signals during the power-on process of the main control module 100 from causing the audio power amplifier module 200 to drive the speaker 600 to produce popping sounds.

[0091] The main control module 100 is connected to the enable end of the audio power amplifier module 200. When the main control module 100 is powered on and enters the stable working state, when voice interaction is required to output an audio signal, the main control module 100 synchronously generates an audio enable signal and transmits it to the enable end of the audio power amplifier module 200, so that the audio power amplifier module 200 can work normally, amplify the input audio signal and then transmit it to the speaker 600 for playback. After the main control module 100 finishes outputting the audio signal, the audio enable signal is cancelled, so that the audio power amplifier module 200 stops working. In this way, when the main control module 100 does not output an audio signal, the audio power amplifier module 200 stops working, avoiding the introduction of interference due to voltage changes or impedance changes in the external circuit during non-audio playback, which is beneficial to improving the stability of the circuit and the user experience.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered by the scope of the claims of the present invention.

Claims

1. A line controller silencing circuit, characterized in that, Including: A main control module and an audio power amplifier module, the main control module is connected to the audio input end of the audio power amplifier module, and the audio output end of the audio power amplifier module is used to be connected to a speaker; A power supply control module, the main control module is connected to the controlled end of the power supply control module, the input end of the power supply control module is connected to a power supply source, and the output end of the power supply control module is connected to the power supply end of the audio power amplifier module; A delay start module, connected to the audio power amplifier module, and when the audio power amplifier module obtains power supply, the delay start module is used to make the audio power amplifier module start after a preset delay time; The audio power amplifier module includes an audio input unit, an amplification unit and an audio output unit connected in sequence, the main control module is connected to the audio input unit, the audio output unit is used to be connected to a speaker, the amplification unit is provided with a bypass end, the delay start module includes a delay capacitor, one end of the delay capacitor is connected to the bypass end, and the other end of the delay capacitor is grounded, and the preset delay time is determined by the capacitance value of the delay capacitor; The main control module controls the power supply of the audio power amplifier module through the power supply control module, so that the power-on timing of the audio power amplifier module is after the main control module and the power-off timing of the audio power amplifier module is before the main control module; The main control module is connected to the enable end of the amplification unit. When outputting an audio signal, the main control module generates a synchronous audio enable signal and transmits it to the enable end of the amplification unit, and the main control module cancels the audio enable signal after the audio signal output is completed.

2. The silencing circuit of the remote controller according to claim 1, wherein It further includes a circuit board, the main control module and the audio power amplifier module are both arranged on the circuit board, the audio power amplifier module is provided with a first audio input end and a second audio input end, the circuit board is provided with a first audio trace and a second audio trace, the first audio input end is connected to the main control module through the first audio trace, the second audio input end is connected to the main control module or grounded through the second audio trace, and the first audio trace and the second audio trace are arranged in parallel.

3. The silencing circuit of the remote controller according to claim 1, wherein The audio input unit includes a first input capacitor, a first input resistor, a second input capacitor and a second input resistor, the amplification unit is provided with a first amplification input end and a second amplification input end, the first amplification input end is connected to one end of the first input resistor, the other end of the first input resistor is connected to one end of the first input capacitor, the other end of the first input capacitor is connected to the main control module, the second amplification input end is connected to one end of the second input resistor, the other end of the second input resistor is connected to one end of the second input capacitor, and the other end of the second input capacitor is connected to the main control module or grounded.

4. The silencing circuit of the remote controller according to claim 3, wherein The audio input unit further includes a first filtering capacitor and a first filtering resistor. The other end of the first input capacitor is respectively connected to the main control module and one end of the first filtering capacitor. The other end of the first filtering capacitor is connected to one end of the first filtering resistor. The other end of the first filtering resistor is grounded.

5. The silencing circuit of the remote controller according to claim 1, wherein The audio output unit includes a first output resistor, a second output resistor, a first output capacitor, and a second output capacitor. The amplification unit is provided with a first amplification output end and a second amplification output end. The first amplification output end is connected to one end of the first output resistor. The other end of the first output resistor is connected to one end of the first output capacitor. The second amplification output end is connected to one end of the second output resistor. The other end of the second output resistor is connected to one end of the second output capacitor. The other ends of the first output capacitor and the second output capacitor are grounded. The other ends of the first output resistor and the second output resistor are both used to be connected to a speaker.

6. The silencing circuit of the remote controller according to claim 1, wherein, The power supply control module includes a first switching tube, a second switching tube, a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor, and a fourth voltage-dividing resistor. One end of the first voltage-dividing resistor is connected to the main control module. The other end of the first voltage-dividing resistor is respectively connected to one end of the second voltage-dividing resistor and the controlled end of the first switching tube. The input end of the first switching tube is connected to one end of the third voltage-dividing resistor. The other end of the second voltage-dividing resistor and the output end of the first switching tube are grounded. The other end of the third voltage-dividing resistor is respectively connected to one end of the fourth voltage-dividing resistor and the controlled end of the second switching tube. The other end of the fourth voltage-dividing resistor is respectively connected to the input end of the second switching tube and a power supply. The output end of the second switching tube is connected to the power supply end of the audio power amplifier module.

7. A control method, characterized in that, Applied to the mute circuit of the wire controller as described in any one of claims 1 to 6, the main control module is connected to the enable end of the audio power amplifier module. The control method includes: After power-on startup, generating a power supply control signal and transmitting it to the power supply control module to enable the audio power amplifier module to obtain power supply; When outputting an audio signal, generating a synchronous audio enable signal and transmitting it to the enable end of the audio power amplifier module, and canceling the audio enable signal after the audio signal output is completed.

8. An air conditioner wired controller, characterized in that, It includes a wire controller body. The wire controller body includes the mute circuit of the wire controller as described in any one of claims 1 to 6. The wire controller body further includes a speaker. The output end of the audio power amplifier module is connected to the speaker. The main control module is used to be connected to an air-conditioning device.

9. The air conditioner wired controller according to claim 8, characterized in that, The main control module executes the control method as described in claim 7.

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