Audio device and control method thereof

Abstract

The invention relates to an audio apparatus and a control method thereof. The audio device comprises a first switch, a controller and a plurality of audio switches. The first switch is turned on or turned off according to whether the audio plug is at a set position, and a first end of the first switch receives a bias voltage. The controller is coupled to the first switch and generates a control signal according to the on or off state of the first switch. The audio switches are respectively coupled between transmission paths of a plurality of audio signals. The audio switch is turned on or off according to the control signal or the voltage on the second end of the first switch.

Description

Technical Field

[0001] The present application relates to an audio device and a control method thereof, and in particular to an audio device capable of reducing popping sound phenomenon and a control method thereof. Background Art

[0002] In today's technical field, headphones with side-tone function can help users hear their own voices through feedback mechanism when wearing them, whether they are talking or talking through microphones, and solve the discomfort caused by wearing headphones. Such audio devices usually have a 3.5mm audio jack for installing microphones or wired audio sources. However, when the microphone or wired audio plug is plugged in or out, pop noise may occur, resulting in a poor user experience.

[0003] In the current technical field, the above-mentioned popping sound phenomenon is often solved by using firmware programs. For example, the receiving speed of the audio signal is delayed by the firmware program, or the playing sound is gradually increased to reduce the impact of the popping sound. However, the above-mentioned method still cannot effectively solve the popping sound problem when the audio plug is slowly inserted or unplugged from the audio device. Summary of the invention

[0004] The present application provides an audio device and a control method thereof, which can effectively reduce the popping sound phenomenon generated when the audio plug is plugged in or out.

[0005] The audio device of the present application includes a first switch, a controller, and a plurality of audio switches. The first switch is turned on or off according to whether the audio plug is in a set position, and the first end of the first switch receives a bias voltage. The controller is coupled to the first switch and generates a control signal according to the on or off state of the first switch. The audio switch is coupled to the controller and is respectively coupled between the transmission paths of the plurality of audio signals. The audio switch is turned on or off according to the control signal or the voltage on the second end of the first switch.

[0006] The control method of the audio device of the present application includes: allowing the first end of the first switch to receive a bias voltage, and allowing the first switch to be turned on or off according to whether the audio plug is in a set position; providing a controller to generate a control signal according to the on or off state of the first switch; providing a plurality of audio switches to be respectively coupled between the transmission paths of a plurality of audio signals; and allowing the audio switch to be turned on or off according to the control signal or the voltage on the second end of the first switch.

[0007] Based on the above, a first switch is provided in the audio device of the present application, and the first switch is used to detect whether the inserted audio plug is inserted into the positioning point. After the audio plug is inserted into the positioning point, the audio switch is turned on so that the audio signal can be transmitted to the inside of the audio device. On the other hand, when the audio plug is out of the positioning point, the audio device can disconnect the audio switch and terminate the transmission of the audio signal. In this way, the popping sound phenomenon caused by the insertion and removal of the audio plug in the audio device can be effectively reduced, thereby improving the performance of the audio device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0009] Figure 1 is a schematic diagram of an audio device according to an embodiment;

[0010] Figure 2 is a schematic diagram of an audio device according to another embodiment;

[0011] Figure 3 is a schematic diagram of an audio device according to another embodiment;

[0012] Figure 4A One of the flow charts of different implementations of the audio device control action according to an embodiment;

[0013] Figure 4B The second flowchart of different implementation methods of the audio device control action according to an embodiment;

[0014] Figure 5 FIG. 4 is a flowchart of an audio device control method according to an embodiment of the present invention.

[0015] Reference numerals:

[0016] 100, 200, 300: Audio device

[0017] 101, 201: Audio plug

[0018] 110, 210: Controller

[0019] 121, 122, 221, 222: Audio switch

[0020] AS1, AS2: audio signal

[0021] CR1, CR2, CR3: Conductive structure

[0022] CTL1, CTL2: control signal

[0023] D1: Insertion direction

[0024] MICS: Microphone signal

[0025] R1: Bias resistor

[0026] S411~S425, S510~S540: Steps

[0027] SW1: First switch

[0028] SW2: Second switch

[0029] TE: Top

[0030] VMIC: Bias voltage

[0031] VR: reference voltage DETAILED DESCRIPTION

[0032] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0034] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0035] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0036] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0037] Please refer to Figure 1 , Figure 1 The audio device 100 is a schematic diagram of an audio device according to an embodiment of the present application. The audio device 100 includes a first switch SW1 , a controller 110 , and audio switches 121 and 122 .

[0038] The first end of the first switch SW1 receives the bias voltage VMIC, and the second end of the first switch SW1 is coupled to the controller 110. The audio switch 121 and the audio switch 122 are coupled to the controller 110. After the audio plug 101 is inserted, the audio switch 121 and the audio switch 122 are respectively coupled between the transmission paths of the audio signal AS1 and the audio signal AS2, and are respectively coupled to the conductive structure CR1 and the conductive structure CR2 on the audio plug 101. The audio device 100 can enable the audio plug 101 to perform an insertion action. The first switch SW1 is set according to the position of the audio plug 101 when it is inserted. Among them, when the audio plug 101 is inserted into a set position, it means that the insertion action of the audio plug 101 has been completed. At this time, it means that the top TE of the audio plug 101 can contact the first switch SW1, and the first switch SW1 is in a conductive state. Conversely, when the audio plug 101 leaves the above-mentioned set position, the top TE of the audio plug 101 is separated from the first switch SW1, and the first switch SW1 can be in a disconnected state.

[0039] In this embodiment, when the audio plug 101 is inserted into the set position, the first switch SW1 can be turned on, and the second end of the first switch SW1 can transmit the bias voltage VMIC to the controller 110. Correspondingly, when the controller 110 receives the bias voltage VMIC transmitted by the first switch SW1, it can be known that the audio plug 101 has been inserted into the set position. Therefore, the controller 110 can generate a control signal CTL1 and a control signal CTL2 with a first voltage value, and transmit the control signal CTL1 and the control signal CTL2 to the audio switch 121 and the audio switch 122 respectively. The audio switch 121 and the audio switch 122 can be turned on according to the control signal CTL1 and the control signal CTL2 respectively.

[0040] When the audio switches 121 and 122 are turned on, the audio signals AS1 and AS2 transmitted on the audio plugs CR1 and CR2 can be transmitted to the controller 110 through the audio switches 121 and 122, respectively. In the embodiment of the present invention, the audio switches 121 and 122 can also be transmitted to the speaker of the audio device 100. The audio signals AS1 and AS2 can be first channel audio signals and second channel audio signals, respectively.

[0041] On the one hand, when the audio plug 101 is unplugged and leaves the set position, the first switch SW1 can be disconnected. At this time, the second end of the first switch SW1 stops transmitting the bias voltage VMIC to the controller 110. Correspondingly, when the controller 110 stops receiving the bias voltage VMIC transmitted by the first switch SW1, it can be known that the audio plug 101 has been unplugged. Therefore, the controller 110 can generate a control signal CTL1 and a control signal CTL2 of a second voltage value, and transmit the control signal CTL1 and the control signal CTL2 to the audio switch 121 and the audio switch 122 respectively. The audio switch 121 and the audio switch 122 can be disconnected according to the control signal CTL1 and the control signal CTL2 respectively.

[0042] The first voltage value and the second voltage value are different, wherein the first voltage value may be a first logic value, and the second voltage value may be a second logic value.

[0043] On the other hand, when the audio plug 101 is inserted into a set position, the controller 110 may transmit a microphone signal MICS to another conductive structure CR3 of the audio plug 101. The microphone signal MICS may be an audio signal sent by the user of the audio device 100 through a microphone.

[0044] From the above description, it can be known that in the audio device 100 of the present invention, according to the detection action of the first switch SW1, the controller 110 receives the corresponding audio signal AS1 and the audio signal AS2 by turning on the corresponding audio switch 121 and the audio switch 122 only after the audio plug 101 is set at the set position. That is, during the process of inserting the audio plug 101, the unstable audio signal AS1 and the audio signal AS2 will not be transmitted to the inside of the audio device 100 to produce the phenomenon of popping sound. Conversely, when the audio plug 101 is unplugged, according to the disconnection action of the first switch SW1, the transmission path of the audio signal AS1 and the audio signal AS2 can be correspondingly disconnected. That is, during the process of unplugging the audio plug 101, the unstable audio signal AS1 and the audio signal AS2 will also not be transmitted to the inside of the audio device 100 to produce the phenomenon of popping sound.

[0045] Please refer to the following Figure 2 , Figure 2 A schematic diagram of an audio device according to another embodiment of the present application is shown. The audio device 200 includes a first switch SW1 , a controller 210 , and audio switches 221 and 222 .

[0046] In this embodiment, when the audio plug 201 is inserted into the set position, the top TE of the audio plug 201 can contact the first switch SW1 to turn on the first switch SW1. Figure 1 The embodiments are different. Figure 2 In the embodiment of the present invention, the second end of the first switch SW1 can be directly coupled to the control ends of the audio switch 221 and the audio switch 222. When the first switch SW1 is turned on, the bias voltage VMIC can be transmitted to the control ends of the audio switch 221 and the audio switch 222 through the first switch SW1, and the audio switch 221 and the audio switch 222 are turned on. When the audio switch 221 and the audio switch 222 are turned on, the audio signal AS1 and the audio signal AS2 transmitted by the conductive structure CR1 and the conductive structure CR2 of the audio plug 201 can be transmitted to the controller 210 and / or the speaker through the audio switch 221 and the audio switch 222, respectively. At the same time, the controller 210 can transmit the microphone signal MICS to another conductive structure CR3 of the audio plug 201.

[0047] On the other hand, when the audio plug 201 is unplugged and separated from the first switch SW1, the first switch SW1 is disconnected. The control ends of the audio switches 221 and 222 no longer receive the bias voltage VMIC and are turned into a disconnected state. As a result, the audio signal AS1 and the audio signal AS2 cannot be transmitted to the controller 210 and / or the speaker. The controller 210 can also stop the transmission of the microphone signal MICS.

[0048] Optionally, in other embodiments of the present invention, a pull-down resistor may be provided at the second end of the first switch SW1. Through the pull-down resistor, when the first switch SW1 is disconnected, the voltage at the second end thereof may be quickly pulled down, and the audio switch 221 and the audio switch 222 may be disconnected in real time.

[0049] Please refer to the following Figure 3 , Figure 3A schematic diagram of an audio device according to another embodiment of the present application is shown. The audio device 300 includes a first switch SW1, a second switch SW2, a controller 310, an audio switch 321, an audio switch 322, and a bias resistor R1. The first end of the first switch SW1 is coupled to the controller 310 through the bias resistor R1, and receives the bias voltage VMIC provided by the controller 310. The second end of the first switch SW1 is coupled to the controller 310. The controller 310 determines the on or off state of the first switch SW1 according to whether the voltage on the second end of the first switch SW1 is the bias voltage VMIC. The first end of the second switch SW2 receives a reference voltage, and the second end of the second switch SW2 is coupled to the controller 310. The second switch SW2 is disposed on the side of the insertion direction D1 of the audio plug 301. When the audio plug 301 is inserted into the audio device 300, the second switch SW2 can be turned on accordingly. Conversely, when the audio plug 301 is pulled out of the audio device 300 and is not inserted into the audio device 300, the second switch SW2 can be turned off accordingly.

[0050] In this embodiment, when the audio plug 301 is inserted into the audio device 300, the second switch SW2 may be turned on first. When the second switch SW2 is turned on, the second switch SW2 may transmit the reference voltage VR received at its first end to the controller 310. At this time, the controller 310 may generate a bias voltage VMIC accordingly. And when the audio plug 301 is inserted into the set position, the audio plug 301 may contact the first switch SW1 and turn on the first switch SW1. Then, the controller 310 generates a control signal CTL1 and a control signal CLT2 accordingly according to detecting that the voltage at the second end of the first switch SW1 is equal to the bias voltage VMIC. Further, the controller 310 may transmit the control signal CTL1 and the control signal CLT2 to the audio switch 321 and the audio switch 322 respectively, so that the audio switch 321 and the audio switch 322 are turned on. When the audio switch 321 and the audio switch 322 are turned on, the audio connector 301 may provide the audio signal AS1 and the audio signal AS2 to the controller 310 and / or the speaker. In addition, when the audio switch 321 and the audio switch 322 are turned on, the controller 310 may provide a microphone signal MICS to the audio plug 301 .

[0051] Similarly, when the audio plug 301 is unplugged from the audio device 300, the first switch SW1 may be disconnected first. Correspondingly, when the voltage on the second end of the first switch SW1 is not equal to the bias voltage VMIC, the controller 310 generates a control signal CTL1 and a control signal CTL2, and disconnects the audio switch 321 and the audio switch 322 through the control signal CTL1 and the control signal CTL2, and controls the transmission of the audio signal AS1 and the audio signal AS2 to be stopped. On the other hand, when the voltage on the second end of the first switch SW1 is not equal to the bias voltage VMIC, the controller 310 may also stop providing the microphone signal MICS to the audio plug 301.

[0052] Furthermore, according to the unplugging action of the audio plug 301, the second switch SW2 is correspondingly disconnected. In this way, the controller 310 determines that the voltage on the second end of the second switch SW2 is not equal to the reference voltage VR, and can stop generating the bias voltage VMIC, thereby saving unnecessary power consumption.

[0053] Optionally, the controller 310 in this embodiment can be a processor with computing capabilities. Alternatively, the controller 310 can be designed using a hardware description language (HDL) or any other digital circuit design method known to those skilled in the art, and implemented as a hardware circuit using a field programmable gate array (FPGA), a complex programmable logic device (CPLD), or an application-specific integrated circuit (ASIC).

[0054] In addition, the first switch SW1 , the second switch SW2 , and the audio switches 321 and 322 may all be constructed by using switch components well known to those skilled in the art without any particular limitation.

[0055] Please refer to the following Figure 4A as well as Figure 4B , Figure 4A as well as Figure 4BFlowcharts of different implementations of the audio device control action of the embodiment of the present application are respectively depicted. In step S411, an audio plug is inserted into the audio device. By detecting the insertion action of the audio plug, in step S412, the controller can send a bias voltage to the first switch. When the audio plug is inserted to the set position, in step S413, the audio plug contacts the first switch and turns on the first switch. Then, in step S414, the controller can transmit a control signal to turn on the audio switch according to the conduction state of the first switch, or transmit a bias voltage to the audio switch to turn on the audio switch. In this way, the audio plug can transmit an audio signal to the controller and / or the speaker through the audio switch, and the controller can also transmit a microphone signal to the audio plug (step S415).

[0056] exist Figure 4B In step S421, the audio plug is unplugged from the audio device. Also, in step S422, the controller may detect that the first switch is in an open (disconnected) state, and in step S423, output a control signal to cut off the audio switch, or turn off (disconnect) the audio switch by stopping supplying a bias voltage. In step S424, based on the audio switch being disconnected, the audio signal stops being transmitted to the controller and / or the speaker, and the controller may also stop transmitting the microphone signal to the audio plug (step S425).

[0057] Please refer to Figure 5 , Figure 5 A flow chart of an audio device control method according to an embodiment of the present application is shown. In step S510, a first end of a first switch receives a bias voltage, and the first switch is turned on or off according to whether the audio plug is in a set position. In step S520, a controller generates a control signal according to the on or off state of the first switch. In step S530, a plurality of audio switches are respectively coupled between transmission paths of a plurality of audio signals. In step S540, the audio switch is turned on or off according to the control signal or the voltage on the second end of the first switch.

[0058] The implementation details of the above steps S510 to S540 have been described in detail in the aforementioned embodiments and will not be elaborated here.

[0059] In summary, the audio device of the present invention is provided with a first switch to detect whether the audio plug has been inserted into a set position in the audio device. When the audio plug is inserted into the set position in the audio device, the audio switch coupled between the audio signal transmission paths is turned on to ensure that the transmission of the audio signal is performed after the audio plug is stably inserted into the audio device, which can effectively reduce the occurrence of popping sound. In addition, the first switch can also detect that the audio plug has been unplugged from the audio device. As a result, the audio device can cut off the audio switch, which can also reduce the possibility of popping sound during the process of unplugging the audio plug.

[0060] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An audio device, characterized in that: include: a first switch, used to be turned on or off according to whether an audio plug is in a set position, wherein a first end of the first switch is used to receive a bias voltage; a controller, coupled to the first switch, and configured to generate a control signal according to an on or off state of the first switch; A plurality of audio switches are coupled to the controller and respectively coupled between transmission paths of a plurality of audio signals, and are used to be turned on or off according to the control signal or the voltage on the second end of the first switch.

2. The audio device according to claim 1, characterized in that When the audio plug is at the set position, the audio plug contacts the first switch and turns on the first switch.

3. The audio device according to claim 2, characterized in that When the audio plug leaves the set position, the audio plug is separated from the first switch and the first switch is turned off.

4. The audio device according to claim 1, characterized in that The controller generates the control signal according to whether the voltage at the second end of the first switch is the bias voltage.

5. The audio device according to claim 3, characterized in that When the controller detects that the voltage on the second end of the first switch is the bias voltage, the controller provides the control signal to turn on the multiple audio switches.

6. The audio device according to claim 3, characterized in that When the controller detects that the second end of the first switch is not at the bias voltage, an on control signal is provided to disconnect the plurality of audio switches.

7. The audio device according to claim 1, characterized in that When the multiple audio switches are turned on, the controller sends a microphone signal to the audio plug, and the audio plug receives the multiple audio signals through the multiple audio switches.

8. The audio device according to claim 7, characterized in that When the plurality of audio switches are disconnected, the controller stops sending the microphone signal to the audio plug.

9. The audio device according to claim 1, characterized in that Also includes: A second switch has a first end for receiving a reference voltage and is disposed on the side of the insertion direction of the audio plug. When the audio plug is inserted into the audio device, the second switch is turned on, and when the audio plug is not inserted into the audio device, the second switch is turned off.

10. The audio device according to claim 1, characterized in that The controller generates the bias voltage according to whether the voltage at the second end of the second switch is the reference voltage.

11. The audio device according to claim 1, characterized in that Also includes: A bias resistor is coupled between the paths of the first switch for receiving the bias voltage.

12. A method for controlling an audio device, characterized in that: include: A first end of a first switch receives a bias voltage, and the first switch is turned on or off according to whether an audio plug is in a set position; Providing a controller to generate a control signal according to the on or off state of the first switch; Providing a plurality of audio switches to be respectively coupled between transmission paths of a plurality of audio signals; as well as The plurality of audio switches are turned on or off according to the control signal or the voltage on the second end of the first switch.

13. The control method according to claim 12, characterized in that: The step of enabling the first switch to be turned on or off according to whether the audio plug is in the set position comprises: When the audio plug is at the set position, the audio plug contacts the first switch and the first switch is turned on.

14. The control method according to claim 13, characterized in that: The step of enabling the first switch to be turned on or off according to whether the audio plug is in the set position further includes: When the audio plug leaves the set position, the audio plug is separated from the first switch and the first switch is turned off.

15. The control method according to claim 12, characterized in that: The step of providing the controller to generate the control signal according to the on or off state of the first switch comprises: The control signal is generated according to whether the voltage at the second end of the first switch is the bias voltage.

16. The control method according to claim 15, characterized in that: Also includes: When the voltage at the second end of the first switch is the bias voltage, the control signal is provided to turn on the plurality of audio switches.

17. The control method according to claim 16, characterized in that: Also includes: When the voltage at the second end of the first switch is not the bias voltage, the control signal is provided to turn off the plurality of audio switches.

18. The control method according to claim 12, characterized in that: Also includes: When the plurality of audio switches are turned on, a microphone signal is sent to the audio plug; as well as The audio signals are received by the audio plug through the audio switches.

19. The control method according to claim 12, characterized in that: Also includes: Providing a second switch to be arranged on the side of the insertion direction of the audio plug; Allowing the first end of the second switch to receive a reference voltage; When the audio plug is inserted into the audio device, the second switch is turned on; as well as When the audio plug is not inserted into the audio device, the second switch is turned off.

20. The control method according to claim 19, characterized in that: Also includes: The controller is enabled to generate the bias voltage according to whether the voltage at the second end of the second switch is the reference voltage.

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