CN119629529A - Audio device and control method thereof - Google Patents

Abstract

The application relates to an audio device and a control method thereof. The audio device includes a first switch, a controller, and a plurality of audio switches. The first switch receives a bias voltage according to whether the audio plug is in a set position to be turned on or off. The controller is coupled to the first switch and generates a control signal according to an on or off state of the first switch. The audio switches are respectively coupled among the transmission paths of the plurality of audio signals. The audio switch is turned on or off according to a control signal or a voltage on a second terminal of the first switch.

Description

Audio device and control method thereof

Technical Field

The present application relates to an audio device and a control method thereof, and more particularly, to an audio device capable of reducing pop noise and a control method thereof.

Background

In the current technical field, when an earphone with a side-tone (side-tone) function is worn, no matter talking or talking through a microphone, the earphone can hear its own voice through a feedback mechanism, and thus the discomfort of wearing the earphone is solved. Such audio devices typically have 3.5 mm audio jacks for mounting microphones or wired audio sources. However, when the microphone or the wired audio plug is plugged in and plugged out in the use state, a POP Noise (POP Noise) phenomenon may occur, so that the use experience is poor.

In the current technical field, firmware programs are often used to solve the pop noise phenomenon. For example, the firmware program is used to delay the receiving speed of the audio signal or gradually increase the played sound so as to reduce the influence of pop noise. However, the above method still cannot effectively solve the problem of popping sound when the audio plug is slowly plugged into or pulled out of the audio device.

Disclosure of Invention

The application provides an audio device and a control method thereof, which can effectively reduce the popping phenomenon generated when an audio plug is plugged and unplugged.

The audio device of the application comprises a first switch, a controller and a plurality of audio switches. The first switch receives a bias voltage according to whether the audio plug is in a set position to be turned on or off. The controller is coupled to the first switch and generates a control signal according to an on or off state of the first switch. The audio switch is coupled to the controller and is 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 terminal of the first switch.

The control method of the audio device comprises the steps of enabling a first end of a first switch to receive bias voltage and enabling the first switch to be conducted or disconnected according to whether an audio plug is in a set position, providing a controller to generate a control signal according to the conducted or disconnected state of the first switch, providing a plurality of audio switches to be respectively coupled among transmission paths of a plurality of audio signals, and enabling the audio switches to be conducted or disconnected according to the control signal or voltage on a second end of the first switch.

Based on the above, the audio device of the present application is provided with the first switch, and detects whether the inserted audio plug is inserted into the positioning point through the first switch. After the audio plug is inserted into the anchor point, the audio switch is turned on so that the audio signal can be transmitted to the inside of the audio device. In another aspect, when the audio plug is disengaged from the anchor point, the audio device may open the audio switch and terminate the delivery of the audio signal. Therefore, the pop noise phenomenon of the audio device caused by the insertion and extraction of the audio plug can be effectively reduced, and the performance of the audio device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of an audio device according to an embodiment;

FIG. 2 is a schematic diagram of an audio device according to another embodiment;

FIG. 3 is a schematic diagram of an audio device according to another embodiment;

FIG. 4A is a flow chart of a different implementation of the audio device control action of an embodiment;

FIG. 4B is a second flowchart of a control operation of the audio device according to an embodiment;

Fig. 5 is a flowchart of an audio device control method according to an embodiment.

Reference numerals:

100. 200, 300 audio device

101. 201 Audio plug

110. 210 Controller

121. 122, 221, 222: Audio switch

AS1, AS2 Audio signals

CR1, CR2, CR3 conductive structure

CTL1, CTL2 control signal

D1 insertion direction

MICS microphone Signal

R1 bias resistor

S411 to S425, S510 to S540

SW1 first switch

SW2 second switch

TE top portion

VMIC bias voltage

VR reference voltage

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

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

It is understood that "at least one" means one or more and "a plurality" means two or more. "at least part of an element" means part or all of the element.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic diagram of an audio device according to an embodiment of the application. The audio device 100 includes a first switch SW1, a controller 110, an audio switch 121, and an audio switch 122.

A first terminal of the first switch SW1 receives the bias voltage VMIC, and a second terminal of the first switch SW1 is coupled to the controller 110. The audio switches 121, 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 structures CR1 and CR2 on the audio plug 101. The audio device 100 may cause the audio plug 101 to perform an insertion action. The first switch SW1 is set according to the position when the audio plug 101 is inserted. When the audio plug 101 is inserted into a set position, it indicates that the insertion of the audio plug 101 is completed. At this time, the top TE of the audio plug 101 may abut against the first switch SW1, and the first switch SW1 is turned on. In contrast, when the audio plug 101 is separated from the above-mentioned setting position, the top TE of the audio plug 101 is separated from the first switch SW1, and at this time, the first switch SW1 may be in an off state.

In this embodiment, when the audio plug 101 is inserted into the setting position, the first switch SW1 may be turned on, and the second terminal of the first switch SW1 may 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 know that the audio plug 101 has been inserted into the set position. Thus, the controller 110 may generate the control signals CTL1 and CTL2 at the first voltage value, and transmit the control signals CTL1 and 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.

When the audio switch 121 and the audio switch 122 are turned on, the audio signal AS1 and the audio signal AS2 transmitted on the audio plug CR1 and the audio plug CR2 can be transmitted to the controller 110 through the audio switch 121 and the audio switch 122, respectively. In an embodiment of the present invention, the audio switch 121 and the audio switch 122 may also be transmitted to the speaker of the audio device 100. The audio signal AS1 and the audio signal AS2 may be a first channel audio signal and a second channel audio signal, respectively.

On the one hand, when the audio plug 101 is pulled out from the set position, the first switch SW1 may be turned off. At this time, the second terminal 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 pulled out. Thus, the controller 110 may generate the control signals CTL1 and CTL2 at the second voltage value, and transmit the control signals CTL1 and CTL2 to the audio switch 121 and the audio switch 122, respectively. The audio switch 121 and the audio switch 122 can be turned off according to the control signal CTL1 and the control signal CTL2, respectively.

The first voltage value is different from the second voltage value, wherein the first voltage value may be a first logic value, and the second voltage value may be a second logic value.

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

AS can be seen from the above description, in the audio device 100 of the present invention, the controller 110 receives the corresponding audio signals AS1 and AS2 by turning on the corresponding audio switches 121 and 122 after the audio plug 101 is set at the set position according to the detection operation of the first switch SW 1. That is, during the insertion of the audio plug 101, the unstable audio signal AS1 and the audio signal AS2 are not transmitted to the inside of the audio device 100 to generate a pop sound phenomenon. In contrast, when the audio plug 101 is pulled out, the transmission path of the audio signal AS1 and the audio signal AS2 can be correspondingly disconnected according to the disconnection of the first switch SW 1. That is, during the process of pulling out the audio plug 101, the unstable audio signal AS1 and the audio signal AS2 are not transmitted to the inside of the audio device 100, and a pop sound phenomenon is not generated.

Referring to fig. 2, fig. 2 is a schematic diagram of an audio device according to another embodiment of the application. The audio device 200 includes a first switch SW1, a controller 210, an audio switch 221, and an audio switch 222.

In this embodiment, when the audio plug 201 is inserted into the set position, the top TE of the audio plug 201 may abut against the first switch SW1 to turn on the first switch SW 1. Unlike the embodiment of fig. 1, in the embodiment of fig. 2, the second terminal of the first switch SW1 may be directly coupled to the control terminals of the audio switch 221 and the audio switch 222. When the first switch SW1 is turned on, the bias voltage VMIC may be transmitted to the control terminals 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. In a state where the audio switch 221 and the audio switch 222 are turned on, the audio signals AS1 and AS2 transmitted by the conductive structures CR1 and 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. Meanwhile, the controller 210 may transmit the microphone signal MICS to another conductive structure CR3 of the audio plug 201.

On the other hand, when the audio plug 201 is pulled out to be separated from the first switch SW1, the first switch SW1 is turned off. The control terminals of the audio switch 221 and the audio switch 222 no longer receive the bias voltage VMIC, but are turned to an off state. AS such, the audio signal AS1 and the audio signal AS2 cannot be transmitted to the controller 210 and/or the speaker. The controller 210 may also stop the transmission of the microphone signal MICS.

Alternatively, in other embodiments of the present invention, a pull-down resistor may be provided on the second terminal of the first switch SW 1. By pulling down the resistor, the voltage on the second terminal of the first switch SW1 is rapidly pulled down when it is turned off, and the audio switch 221 and the audio switch 222 are turned off in real time.

Referring to fig. 3, fig. 3 is a schematic diagram of an audio device according to another embodiment of the application. 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. A second terminal 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 terminal of the first switch SW1 is the bias voltage VMIC. The first terminal of the second switch SW2 receives the reference voltage, and the second terminal of the second switch SW2 is coupled to the controller 310. The second switch SW2 is disposed at a side of the insertion direction D1 of the audio plug 301, and when the audio plug 301 is inserted into the audio device 300, the second switch SW2 may be correspondingly turned on. In contrast, when the audio plug 301 is pulled out from the audio device 300 without being inserted into the audio device 300, the second switch SW2 may be correspondingly turned off.

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 the first terminal thereof to the controller 310. At this time, the controller 310 may correspondingly generate the bias voltage VMIC. And when the audio plug 301 is inserted into the set position, the audio plug 301 may abut against the first switch SW1, and cause the first switch SW1 to be turned on. Next, the controller 310 generates the control signal CTL1 and the control signal CLT2 according to detecting that the voltage on the second terminal of the first switch SW1 is equal to the bias voltage VMIC. Further, the controller 310 may transmit the control signal CTL1, the control signal CLT2 to the audio switch 321, the audio switch 322, respectively, such 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 can provide the audio signal AS1, 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 the microphone signal MICS to the audio plug 301.

Likewise, when the audio plug 301 is pulled out of the audio device 300, the first switch SW1 may be turned off first. Correspondingly, when the voltage on the second terminal of the first switch SW1 is not equal to the bias voltage VMIC, the controller 310 generates the control signal CTL1 and the control signal CTL2, and controls to stop the transmission of the audio signal AS1 and the audio signal AS2 by turning off the audio switch 321 and the audio switch 322 through the control signal CTL1 and the control signal CTL 2. On the other hand, when the voltage on the second terminal of the first switch SW1 is not equal to the bias voltage VMIC, the controller 310 may also stop supplying the microphone signal MICS to the audio plug 301.

Then, according to the pulling-out operation of the audio plug 301, the second switch SW2 is turned off correspondingly. In this way, the controller 310 determines that the voltage on the second terminal of the second switch SW2 is not equal to the reference voltage VR, and can stop the generation of the bias voltage VMIC. Unnecessary power consumption can be saved.

Alternatively, the controller 310 in the present embodiment may be a processor having an arithmetic capability. Alternatively, the controller 310 may be a hardware Circuit implemented by a hardware description language (Hardware Description Language, HDL) or any other digital Circuit design known to those of ordinary skill in the art, such as a field programmable gate array (Field Programmable GATE ARRAY, FPGA), complex programmable logic device (Complex Programmable Logic Device, CPLD), or Application-specific integrated Circuit (ASIC).

In addition, the first switch SW1, the second switch SW2, the audio switch 321 and the audio switch 322 can be configured by using switch components well known to those skilled in the art, and are not particularly limited.

Referring to fig. 4A and fig. 4B, fig. 4A and fig. 4B are flowcharts respectively illustrating different implementations of the audio device control operation according to the embodiments of the present application. In step S411, an audio plug is inserted into an audio device. By detecting the insertion of the audio plug, the controller may send a bias voltage to the first switch in step S412. When the audio plug is inserted into the set position, in step S413, the audio plug abuts against the first switch, and causes the first switch to be turned on. Next, in step S414, the controller may transmit a control signal to make the audio switch turned on according to the on state of the first switch, or transmit a bias voltage to the audio switch to make the audio switch turned on. In this way, the audio plug may transmit the audio signal to the controller and/or the speaker through the audio switch, and the controller may also transmit the microphone signal to the audio plug (step S415).

In fig. 4B, in step S421, the audio plug is pulled out of the audio device. And, the controller may detect that the first switch is in an open (off) state in step S422, and output a control signal to turn off the audio switch or turn off (off) the audio switch by stopping the supply of the bias voltage in step S423. In step S424, the controller may also stop transmitting the microphone signal to the audio plug (step S425) based on the audio switch being turned off, the audio signal stopping being transmitted to the controller and/or the speaker.

Referring to fig. 5, fig. 5 is a flowchart illustrating a control method of an audio device according to an embodiment of the application. In step S510, the first end of the first switch receives the bias voltage and causes the first switch to be turned on or off according to whether the audio plug is in the set position. In step S520, the 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 terminal of the first switch.

Details of the implementation of steps S510 to S540 are described in the above embodiments, and are not repeated here.

In summary, the audio device of the present invention detects whether the audio plug has been inserted into a set position in the audio device by setting the first switch. 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, so that the audio signal transmission action is ensured to be performed after the audio plug is stably inserted into the audio device, and the occurrence of the popping phenomenon can be effectively reduced. In addition, the first switch can also detect that the audio plug is pulled out of the audio device. Therefore, the audio device can cut off the audio switch, and the possibility of pop sound phenomenon in the process of pulling out the audio plug can be reduced.

In the description of the present specification, reference to the term "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in greater detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims (20)

1. An audio device, comprising:

A first switch for receiving a bias voltage according to whether an audio plug is at a set position to be turned on or off;

the controller is coupled with the first switch and is used for generating a control signal according to the on or off state of the first switch;

the audio switches are coupled with the controller and respectively coupled among transmission paths of the audio signals and are used for being conducted or disconnected according to the control signals or the voltage on the second end of the first switch.

2. The audio device of claim 1, wherein when the audio plug is in the set position, the audio plug abuts the first switch and causes the first switch to be turned on.

3. The audio device of claim 2, wherein the audio plug is separated from the first switch and causes the first switch to be opened when the audio plug is moved from the set position.

4. The audio device of claim 1, wherein the controller generates the control signal based on whether the voltage on the second terminal of the first switch is the bias voltage.

5. The audio device of claim 3, wherein the control signal is provided to turn on the plurality of audio switches when the controller detects the voltage on the second end of the first switch as the bias voltage.

6. The audio device of claim 3, wherein an on control signal is provided to turn off the plurality of audio switches when the controller detects that the second end of the first switch is not the bias voltage.

7. The audio device of claim 1, wherein the controller sends a microphone signal to the audio plug when the plurality of audio switches are turned on and receives the plurality of audio signals from the audio plug through the plurality of audio switches.

8. The audio device of claim 7, wherein the controller stops sending the microphone signal to the audio plug when the plurality of audio switches are turned off.

9. The audio device of claim 1, further comprising:

the second switch is provided with a first end for receiving a reference voltage and is arranged at the side edge of the insertion direction of the audio plug, and is turned on when the audio plug is inserted into the audio device and turned off when the audio plug is not inserted into the audio device.

10. The audio device of claim 1, wherein the controller generates the bias voltage based on whether the voltage on the second terminal of the second switch is the reference voltage.

11. The audio device of claim 1, further comprising:

And a bias resistor coupled between paths of the first switch for receiving the bias voltage.

12. A control method of an audio device, comprising:

Enabling a first end of a first switch to receive a bias voltage and enabling the first switch to be switched on or off according to whether an audio plug is at a set position or not;

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 respectively coupled between the transmission paths of the plurality of audio signals, and

The plurality of audio switches are caused to be turned on or off in accordance with the control signal or the voltage on the second terminal of the first switch.

13. The control method according to claim 12, wherein the step of causing the first switch to be turned on or off in accordance with whether the audio plug is in the set position includes:

when the audio plug is at the set position, the audio plug is made to abut against the first switch and the first switch is made to be conducted.

14. The control method according to claim 13, wherein the step of causing the first switch to be turned on or off in accordance with whether the audio plug is in the set position further comprises:

When the audio plug leaves the set position, the audio plug is separated from the first switch and the first switch is opened.

15. The control method of claim 12, wherein the step of providing the controller to generate the control signal based on the on or off state of the first switch comprises:

the control signal is generated according to whether the voltage on the second end of the first switch is the bias voltage.

16. The control method according to claim 15, characterized by further comprising:

the control signal is provided to turn on the plurality of audio switches when the voltage on the second terminal of the first switch is the bias voltage.

17. The control method according to claim 16, characterized by further comprising:

the control signal is provided to turn off the plurality of audio switches when the voltage on the second terminal of the first switch is not the bias voltage.

18. The control method according to claim 12, characterized by further comprising:

transmitting a microphone signal to the audio plug when the plurality of audio switches are turned on, and

The plurality of audio signals are received by the audio plug through the plurality of audio switches.

19. The control method according to claim 12, characterized by further comprising:

Providing a second switch to be arranged at the side edge of the insertion direction of the audio plug;

enabling 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, and

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 by further comprising:

The controller is caused to generate the bias voltage based on whether the voltage on the second terminal of the second switch is the reference voltage.