CN211378222U - Audio circuit, head-mounted display equipment and head-mounted display system - Google Patents
Audio circuit, head-mounted display equipment and head-mounted display system Download PDFInfo
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- CN211378222U CN211378222U CN201922380318.8U CN201922380318U CN211378222U CN 211378222 U CN211378222 U CN 211378222U CN 201922380318 U CN201922380318 U CN 201922380318U CN 211378222 U CN211378222 U CN 211378222U
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Abstract
The utility model discloses an audio circuit, head mounted display device and head mounted display system. The audio circuit includes: an audio providing device which outputs an analog audio signal; the loudspeaker playing component executes playing operation according to the received analog audio signal; the earphone interface transmits the received analog audio signal to an earphone connected with the earphone interface; the first main switch corresponding to each sound channel is connected between the audio output end and the input end of the loudspeaker playing component corresponding to the sound channel, and the second switch is connected between the audio output end and the corresponding sound channel end of the earphone interface; and the controller is connected with the detection end and the earphone interface, detects whether the earphone interface is in a connection state of connecting the earphone or not, is connected with the control end of the first main switch, and outputs a control signal for controlling the first switch to be disconnected and controlling the second switch to be connected or outputs a control signal for controlling the first switch to be connected and controlling the second switch to be disconnected according to the detection result through the first output end.
Description
Technical Field
The utility model relates to an acoustoelectric technology field, more specifically relates to an audio circuit, a wear display device and a wear display system.
Background
At present, for a head-mounted display device which needs to be connected with a terminal (such as a mobile phone) to work, in the case that the terminal cancels a 3.5mm earphone jack of the terminal, since the terminal transmits Audio and video signals to the head-mounted display device through a USB Type-C interface of the terminal, the terminal may recognize the head-mounted display device as a USB Audio device, that is, recognize the head-mounted display device as an earphone device.
However, when the head mounted display device is recognized as the headphone device, there is only one audio transmission path of the head mounted display device. Specifically, the audio transmission path of the head-mounted display device has only one kind of headphone path or only one kind of speaker path. And under the condition that the terminal cancels the 3.5mm earphone jack of the terminal and the USB Type-C interface is occupied, the audio transmission path of the head-mounted display equipment is usually required to have an earphone path and a loudspeaker path.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to provide a new audio circuit.
According to the utility model discloses a first aspect provides an audio circuit, include:
an audio providing device configured to output an analog audio signal through an audio output;
a speaker playing component configured to perform a playing operation according to the received analog audio signal;
a headphone interface configured to transfer a received analog audio signal to a headphone connected to the headphone interface;
the first main switch corresponding to each sound channel comprises a first switch and a second switch, the first switch is connected between the audio output end and the input end of the loudspeaker playing component corresponding to the sound channel, and the second switch is connected between the audio output end and the corresponding sound channel end of the earphone interface; and the number of the first and second groups,
the connection detection end of the controller is connected with the earphone interface so as to detect whether the earphone interface is in a connection state of connecting an earphone or not; the first output end of the controller is connected with the control end of the first main switch, the controller is configured to output a control signal for controlling the first switch to be disconnected and controlling the second switch to be connected through the first output end when the earphone interface is detected to be in the connection state, and output a control signal for controlling the first switch to be connected and controlling the second switch to be disconnected through the first output end when the earphone interface is detected not to be in the connection state.
Optionally, the first main switch comprises an input contact, a first output contact and a second output contact, the first switch and the second switch share the input contact, the input contact and the first output contact form the first switch, and the input contact and the second output contact form the second switch.
Optionally, the audio circuit further comprises a second master switch corresponding to each channel, including a third switch and a fourth switch; the second master switch comprises a first input contact, a second input contact and an output contact, the third switch and the fourth switch share the output contact, the first input contact and the output contact form a third switch, and the second input contact and the output contact form a fourth switch; the third switch is connected between the second output contact of the second switch and the corresponding sound channel end of the earphone interface; the fourth switch is connected between a grounding end and a corresponding sound channel of the earphone interface at a corresponding sound channel end;
the second output end of the controller is connected with the control end of the second main switch, the controller is further configured to output a control signal for controlling the fourth switch to be disconnected and controlling the third switch to be connected through the second output end when the earphone interface is detected to be in the connection state, and output a control signal for controlling the fourth switch to be connected and controlling the third switch to be disconnected through the second output end when the earphone interface is detected not to be in the connection state.
Optionally, the controller is configured to, when it is detected that the earphone interface is in the connection state, output a control signal for controlling the first switch to be disconnected and the second switch to be connected through the first output terminal, and output a control signal for controlling the fourth switch to be disconnected and the third switch to be connected through the second output terminal.
Optionally, the controller is configured to, when it is detected that the earphone interface is not in the connection state, output a control signal for controlling the connection of the fourth switch and the disconnection of the third switch through the second output terminal, and output a control signal for controlling the connection of the first switch and the disconnection of the second switch through the first output terminal.
Optionally, a third output end of the controller is connected to a control end of each power amplifier in the speaker playing component, and the controller is configured to output a control signal for controlling a corresponding power amplifier to turn off the power supply through the third output end when detecting that the earphone interface is in the connection state, and output a control signal for controlling a corresponding power amplifier to turn on the power supply through the third output end when detecting that the earphone interface is not in the connection state.
Optionally, a fourth output end of the controller is connected to the control end of the audio providing apparatus, and the controller is configured to output a control signal for controlling the audio providing apparatus to output a corresponding analog audio signal at the audio output end through the fourth output end when detecting that the earphone interface is in the connection state, and output a control signal for controlling the audio providing apparatus to output a corresponding analog audio signal at the audio output end according to the audio parameter value of the speaker playing component through the fourth output end when detecting that the earphone interface is not in the connection state.
Optionally, the audio providing device is a USB audio codec.
According to a second aspect of the present invention, there is provided a head mounted display device comprising an audio circuit as defined in any one of the above first aspects.
According to a third aspect of the present invention, there is provided a head-mounted display system, comprising:
a digital audio signal output device, and a head mounted display device as described in the second aspect above;
the digital audio signal output device configured to output a digital audio signal;
the input end of the audio providing device of the audio circuit in the head-mounted display equipment is connected with the output end of the digital audio signal output equipment for outputting the digital audio signal.
In this embodiment, when the earphone is inserted into the earphone interface, the controller will detect that the earphone interface is in the earphone connection state through the connection detection terminal. At this time, the first output end of the controller is connected with the control end of the first main switch, and the control signal for controlling the disconnection of the first switch and the connection of the second switch is output through the first output end. At this time, the audio output end for outputting the analog audio signal of the left channel is disconnected from the input end of the loudspeaker playing component of the left channel, and the audio output end for outputting the analog audio signal of the right channel is disconnected from the input end of the loudspeaker playing component of the right channel. Thus, the loudspeaker plays the analog audio signal that the assembly can not receive. Meanwhile, the audio output end for outputting the analog audio signal of the left channel is connected with the left channel end of the earphone interface, and the audio output end for outputting the analog audio signal of the right channel is connected with the right channel end of the earphone interface. Thus, the earphone interface receives the analog audio signal, and further, the earphone connected with the earphone interface outputs the analog audio signal. That is, when the earphone is inserted into the earphone interface, the earphone connected with the earphone interface outputs the analog audio signal, and the speaker playing component does not play the analog audio signal.
Correspondingly, when the earphone is not inserted into the earphone interface, the controller detects that the earphone interface is not in the earphone connection state through the connection detection end. At this time, the first output end of the controller is connected with the control end of the first main switch, and the control signals for controlling the connection of the first switch and the disconnection of the second switch are output through the first output end. At this time, the audio output end for outputting the analog audio signal of the left channel is connected with the input end of the loudspeaker playing component of the left channel, and the audio output end for outputting the analog audio signal of the right channel is connected with the input end of the loudspeaker playing component of the right channel. Thus, the loudspeaker playing assembly outputs the received analog audio signal. Meanwhile, the audio output end for outputting the analog audio signal of the left channel is disconnected with the left channel end of the earphone interface, and the audio output end for outputting the analog audio signal of the right channel is disconnected with the right channel end of the earphone interface. In this way, no analog audio signal will be received at the headphone interface. That is, the earphone is not inserted into the earphone interface, the earphone interface cannot receive the analog sound signal, and the loudspeaker playing component receives the analog audio signal and plays the received analog audio signal. Therefore, the audio circuit provided by the present embodiment includes both the headphone path and the speaker path.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of an audio circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another audio circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a head-mounted display system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another head-mounted display system according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
< embodiment of Audio Circuit >
The present embodiments provide an audio circuit that may be provided in an AR or VR device.
As shown in fig. 1, the audio circuit includes: the audio system comprises an audio providing device, a loudspeaker playing component, an earphone interface, a first main switch corresponding to each sound channel and a controller. Wherein:
an audio providing device configured to output an analog audio signal through an audio output.
In this embodiment, the audio providing apparatus may be a USB audio codec. The USB Audio Codec is also commonly referred to as a USB sound card or, as shown in FIG. 2, as a USB Audio Codec. Of course, the audio providing apparatus may also be an audio codec of other forms, and this embodiment is not limited thereto.
In this embodiment, the audio providing means typically comprises two audio outputs. One of the audio output terminals is used for outputting the analog audio signal of the left channel, and the other audio output terminal is used for outputting the analog audio signal of the right channel. That is, the audio providing apparatus is specifically configured to output the analog audio signal of the left channel and the analog audio signal of the right channel through the two audio output terminals, respectively.
And the loudspeaker playing component is configured to execute playing operation according to the received analog audio signal.
In the present embodiment, as shown in fig. 2, the speaker playing assemblies generally include a left ear speaker playing assembly and a right ear speaker playing assembly. The left ear speaker playing component comprises a left ear speaker and a power amplifier for driving the left ear speaker. Correspondingly, the right ear speaker playing component comprises a right ear speaker and a power amplifier for driving the right ear speaker.
In addition, the analog audio signals received by the speaker playing component in this embodiment include analog audio signals of a left channel and analog audio signals of a right channel.
Based on the above, in this embodiment, the analog audio signal of the left channel received by the speaker playing component is amplified by the power amplifier of the left ear speaker and then input to the left ear speaker. The analog audio signal of the right sound channel received by the loudspeaker playing component is input to the right ear loudspeaker after being amplified by the power amplifier of the right ear loudspeaker.
A headphone interface configured to transfer the received analog audio signal to a headphone to which the headphone interface is connected.
In this embodiment, the headset interface is used for the user to plug in a headset. Under the condition that the earphone is inserted into the earphone interface, the earphone interface receives the analog audio signal and transmits the received analog audio signal to the earphone connected with the earphone interface.
In addition, the earphone interface generally includes at least a ground terminal, a left channel terminal, and a right channel terminal.
The first main switch corresponding to each sound channel comprises a first switch and a second switch, the first switch is connected between the audio output end and the input end of the loudspeaker playing component corresponding to the sound channel, and the second switch is connected between the audio output end and the corresponding sound channel end of the earphone interface.
In this embodiment, the audio circuit includes two first main switches. One of the first main switches corresponds to the left channel and the other first main switch corresponds to the right channel.
For the first main switch corresponding to the left channel, the first switch is connected between the audio output end for outputting the analog audio signal of the left channel and the input end of the corresponding left ear speaker playing component of the left channel. More specifically, the first switch is connected between an audio output terminal that outputs an analog audio signal of the left channel and an input terminal of a power amplifier that drives the left ear speaker. The second switch is connected between an audio output end for outputting the analog audio signal of the left channel and the left channel end of the earphone interface.
For the first main switch corresponding to the right channel, the first switch is connected between the audio output end for outputting the analog audio signal of the right channel and the input end of the corresponding right ear speaker playing component of the right channel. More specifically, the first switch is connected between an audio output terminal that outputs an analog audio signal of the right channel and an input terminal of a power amplifier that drives a right ear speaker. The second switch is connected between an audio output end for outputting the analog audio signal of the right channel and the right channel end of the earphone interface.
The connection detection end of the controller is connected with the earphone interface so as to detect whether the earphone interface is in a connection state of connecting an earphone or not; the first output end of the controller is connected with the control end of the first main switch, the controller is configured to output a control signal for controlling the first switch to be disconnected and controlling the second switch to be connected through the first output end when the earphone interface is detected to be in a connection state, and output a control signal for controlling the first switch to be connected and controlling the second switch to be disconnected through the first output end when the earphone interface is detected not to be in the connection state.
In this embodiment, as shown in fig. 2, the controller may be an MCU. In addition, in this embodiment, the controller includes a connection detection end, the connection detection end is connected to the earphone interface, and the controller detects whether the earphone interface is in a connection state of connecting the earphone through the connection detection end.
In one embodiment, the connection detection terminal is connected to a left channel terminal in the headphone interface, and the controller detects that the headphone interface is in a connected state of the headphone when the connection detection terminal detects that a level on the left channel terminal is a high level.
It should be noted that the connection detection terminal is specifically connected to a specific channel terminal in the headphone interface, which is related to the type of the headphone. Therefore, in the present embodiment, the connection detection terminal is connected to the left channel terminal in the headphone jack, which is only an exemplary illustration and does not limit the scope of the present application.
In this embodiment, when the controller detects that the earphone interface is in the connection state through the connection detection terminal, the controller outputs a control signal for controlling the first switch to be disconnected and controlling the second switch to be connected through the first output terminal of the controller. The first switch is in a disconnected state under the action of the control signal, and the second switch is in a connected state under the action of the control signal. At this time, since the first switch is turned off, the audio output terminal for outputting the analog audio signal of the left channel and the input terminal of the speaker playing component of the left channel are turned off, and the audio output terminal for outputting the analog audio signal of the right channel and the input terminal of the speaker playing component of the right channel are turned off. Thus, the loudspeaker plays the analog audio signal that the assembly can not receive. Correspondingly, due to the connection of the second switch, the audio output end for outputting the analog audio signal of the left channel is connected with the left channel end of the earphone interface, and the audio output end for outputting the analog audio signal of the right channel is connected with the right channel end of the earphone interface. In this way, an analog audio signal is received at the headphone interface. Further, an earphone connected to the earphone interface outputs an analog audio signal.
In this embodiment, when the controller detects that the earphone interface is not in the connected state through the connection detection terminal, a control signal for controlling the first switch to be connected and the second switch to be disconnected is output through the first output terminal of the controller. The first switch is in a connection state under the action of the control signal, and the second switch is in a disconnection state under the action of the control signal. At this time, because the first switch is connected, the audio output end for outputting the analog audio signal of the left channel is connected with the input end of the loudspeaker playing component of the left channel, and the audio output end for outputting the analog audio signal of the right channel is connected with the input end of the loudspeaker playing component of the right channel. Thus, the loudspeaker playing assembly outputs the received analog audio signal. Correspondingly, due to the fact that the second switch is disconnected, the audio output end for outputting the analog audio signal of the left channel is disconnected with the left channel end of the earphone interface, and the audio output end for outputting the analog audio signal of the right channel is disconnected with the right channel end of the earphone interface. In this way, no analog audio signal will be received at the headphone interface.
In this embodiment, when the earphone is inserted into the earphone interface, the controller will detect that the earphone interface is in the earphone connection state through the connection detection terminal. At this time, the first output end of the controller is connected with the control end of the first main switch, and the control signal for controlling the disconnection of the first switch and the connection of the second switch is output through the first output end. At this time, the audio output end for outputting the analog audio signal of the left channel is disconnected from the input end of the loudspeaker playing component of the left channel, and the audio output end for outputting the analog audio signal of the right channel is disconnected from the input end of the loudspeaker playing component of the right channel. Thus, the loudspeaker plays the analog audio signal that the assembly can not receive. Meanwhile, the audio output end for outputting the analog audio signal of the left channel is connected with the left channel end of the earphone interface, and the audio output end for outputting the analog audio signal of the right channel is connected with the right channel end of the earphone interface. Thus, the earphone interface receives the analog audio signal, and further, the earphone connected with the earphone interface outputs the analog audio signal. That is, when the earphone is inserted into the earphone interface, the earphone connected with the earphone interface outputs the analog audio signal, and the speaker playing component does not play the analog audio signal.
Correspondingly, when the earphone is not inserted into the earphone interface, the controller detects that the earphone interface is not in the earphone connection state through the connection detection end. At this time, the first output end of the controller is connected with the control end of the first main switch, and the control signals for controlling the connection of the first switch and the disconnection of the second switch are output through the first output end. At this time, the audio output end for outputting the analog audio signal of the left channel is connected with the input end of the loudspeaker playing component of the left channel, and the audio output end for outputting the analog audio signal of the right channel is connected with the input end of the loudspeaker playing component of the right channel. Thus, the loudspeaker playing assembly outputs the received analog audio signal. Meanwhile, the audio output end for outputting the analog audio signal of the left channel is disconnected with the left channel end of the earphone interface, and the audio output end for outputting the analog audio signal of the right channel is disconnected with the right channel end of the earphone interface. In this way, no analog audio signal will be received at the headphone interface. That is, the earphone is not inserted into the earphone interface, the earphone interface cannot receive the analog sound signal, and the loudspeaker playing component receives the analog audio signal and plays the received analog audio signal. Therefore, the audio circuit provided by the present embodiment includes both the headphone path and the speaker path.
In one embodiment, as shown in fig. 2, the first main switch comprises an input contact, a first output contact and a second output contact, the first switch and the second switch share the input contact, the input contact and the first output contact constitute a first switch, and the input contact and the second output contact constitute a second switch.
In this embodiment, the first main switch may be a single-pole double-throw switch. In addition, the third switch and the fourth switch share the input contact, so that the area occupied by the first main switch can be effectively reduced, and the design difficulty of the audio circuit can be further reduced.
On the basis of the above embodiment, as shown in fig. 2, the present embodiment provides another audio circuit. In this embodiment, the audio circuit further includes a second master switch corresponding to each channel, including a third switch and a fourth switch; the second master switch comprises a first input contact, a second input contact and an output contact, the third switch and the fourth switch share the output contact, the first input contact and the output contact form the third switch, and the second input contact and the output contact form the fourth switch; the third switch is connected between the second output contact of the second switch and the corresponding sound channel end of the earphone interface; the fourth switch is connected between the grounding end and the corresponding sound channel end of the earphone interface of the corresponding sound channel;
the second output end of the controller is connected with the control end of the second master switch, and the controller is further configured to output a control signal for controlling the fourth switch to be disconnected and controlling the third switch to be connected through the second output end when the earphone interface is detected to be in the connected state, and output a control signal for controlling the fourth switch to be connected and controlling the third switch to be disconnected through the second output end when the earphone interface is detected not to be in the connected state.
In this embodiment, taking the second master switch of the left channel as an example, the second output terminal of the controller is connected to the control terminal of the second master switch, and when the controller detects that the earphone interface is in the connection state through the connection detection terminal of the controller, the controller outputs a control signal for controlling the fourth switch to be turned off and turned on through the second output terminal, and controls the third switch to be connected. The third switch is in a connected state under the action of the control signal, and the fourth switch is in a disconnected state under the action of the control signal. At this time, since the fourth switch is turned off, the third switch is connected. Thus, when the second switch is connected, the headphone will receive the analog audio signal of the left channel and input to interface with the headphone.
Correspondingly, when the controller detects that the earphone interface is not in a connection state through the connection detection end of the controller, the controller outputs a control signal for controlling the third switch to be disconnected and controlling the fourth switch to be connected through the second output end. The third switch is in an off state under the action of the control signal, and the fourth switch is in a connected state under the action of the control signal. At this time, since the fourth switch is connected, the third switch is turned off. Thus, when the second switch is off, the earphone will not receive the analog audio signal of the left channel, but will be in a grounded state. In this way, the stability and safety of the audio circuit can be improved.
In this embodiment, the second main switch may be a single-pole double-throw switch, so that the area occupied by the second main switch can be effectively reduced, and the design difficulty of the audio circuit can be further reduced.
On the basis of the above embodiment, the controller in the audio circuit provided by this embodiment may be specifically configured to: and when the earphone interface is detected to be in the connection state, under the condition that the control signal for controlling the disconnection of the first switch and the connection of the second switch is output through the first output end, the control signal for controlling the disconnection of the fourth switch and the connection of the third switch is output through the second output end.
In this embodiment, when the earphone interface is detected to be in the connection state, the first output terminal may first control the first switch to be turned off and control the control signal for the second switch to be connected, and then the second output terminal may control the fourth switch to be turned off and control the control signal for the third switch to be connected. That is, after the first switch is turned off and the second switch is turned on, the fourth switch is turned off again and the third switch is turned on. Therefore, noise such as 'acquired noise' existing in the analog audio signal output by the earphone after the earphone is inserted into the earphone interface can be avoided. This improves the output quality of the analog audio signal, further improving the user experience.
On the basis of the previous embodiment, the controller in the audio circuit provided by the present embodiment may be further specifically configured to:
when the earphone interface is detected not to be in a connection state, under the condition that a control signal for controlling the connection of the fourth switch and the disconnection of the third switch is output through the second output end, a control signal for controlling the connection of the first switch and the disconnection of the second switch is output through the first output end.
In this embodiment, when it is detected that the earphone interface is not in the connection state, the control signal for controlling the connection of the fourth switch and the disconnection of the third switch may be output through the second output terminal, and then the control signal for controlling the connection of the first switch and the disconnection of the second switch may be output through the first output terminal. That is, after the third switch is turned off and the fourth switch is turned on, the first switch is turned on and the second switch is turned off. Thus, noise such as 'nuisance' in the output audio signal of the speaker playing assembly can be avoided. This improves the output quality of the analog audio signal, further improving the user experience.
On the basis of any of the foregoing embodiments, in the audio circuit provided in this embodiment, the controller further includes a third output terminal. The third output end of the controller is connected with the control end of each power amplifier component in the loudspeaker playing component, and the controller is configured to output a control signal for controlling the corresponding power amplifier component to be powered off through the second output end when detecting that the earphone interface is in a connection state, and output a control signal for controlling the corresponding power amplifier component to be powered on through the second output end when detecting that the earphone interface is not in the connection state.
In this embodiment, when the controller detects that the earphone interface is in the connection state, at this time, the earphone connected to the earphone interface outputs the analog audio signal, and the speaker playing component does not play the analog audio signal. Therefore, in order to avoid the power consumption of each power amplifier in the speaker play assembly when in the standby state, as shown in fig. 2, the controller outputs a control signal for controlling the corresponding power amplifier to turn off the power supply to the control terminal of the corresponding power amplifier through the third output terminal, so that the power amplifier is in the off state and does not consume the power supply. Thus, the power consumption can be greatly saved.
Correspondingly, when the controller detects that the earphone interface is in a connection state, the earphone connected with the earphone interface cannot output the analog audio signal, and the loudspeaker playing component plays the analog audio signal. At this moment, a control signal for controlling the corresponding power amplifier to be powered on is output to the control end corresponding to the power amplifier through the third output end, so that the corresponding power amplifier is in a working state and can amplify the received analog audio signal, and the corresponding loudspeaker is driven, and the loudspeaker playing component can normally play the analog audio signal.
On the basis of any of the foregoing embodiments, this embodiment provides the audio circuit, wherein the controller further includes a fourth output terminal. The fourth output end of the controller is connected with the control end of the audio providing device, the controller is configured to output a control signal for controlling the audio providing device to output a corresponding analog audio signal at the audio output end according to the audio parameter value of the earphone when detecting that the earphone interface is in the connection state, and output a control signal for controlling the audio providing device to output a corresponding analog audio signal at the audio output end according to the audio parameter value of the loudspeaker playing component through the fourth output end when detecting that the earphone interface is not in the connection state.
In this embodiment, the audio parameter value may be any combination of a volume value, an amplification factor of the analog audio signal, an EQ value, and the like. Since the audio parameter values corresponding to the analog audio signals played by the earphone and the speaker are usually different, it is necessary that when the analog audio signals played by the earphone are played by the earphone, the audio parameter values corresponding to the analog audio signals output by the audio providing device conform to the audio parameter values required by the earphone. Correspondingly, when the loudspeaker plays the analog audio signal, the audio parameter value corresponding to the analog audio signal output by the audio providing device conforms to the audio parameter value required by the loudspeaker. Therefore, when the controller detects that the earphone interface is in a connection state, the controller can output a control signal for controlling the audio providing device to output a corresponding analog audio signal at the audio output end according to the audio parameter value of the earphone at the fourth output end. Correspondingly, when the earphone interface is detected not to be in the connection state, the fourth output end outputs a control signal for controlling the audio providing device to output a corresponding analog audio signal at the audio output end according to the audio parameter value of the loudspeaker playing component. Therefore, the analog audio signal can be automatically adjusted by the audio circuit, so that the possibility of manual adjustment for many times by a user is avoided, and the user experience is greatly improved.
< embodiments of head mounted display device >
This embodiment provides a head-mounted display device comprising any of the audio circuits of the apparatus embodiments described above.
In this embodiment, the head mounted display device may be AR/VR glasses, an AR/VR helmet, or the like.
< embodiments of head mounted display System >
The present embodiment provides a head-mounted display system 30, as shown in fig. 3, the system 30 includes: a digital audio signal output device 31, a head mounted display device 32 as provided in the above-described embodiments of the head mounted display device. Wherein:
a digital audio signal output device 31 configured to output a digital audio signal.
In the present embodiment, the digital audio signal output device 31 may be a mobile phone, a computer, a notebook computer, etc.
An input terminal of the audio supply device of the audio circuit 321 in the head-mounted display device 32 is connected to an output terminal of the digital audio signal output device 31 that outputs a digital audio signal.
In this embodiment, the connection may be a connection using a USB cable. Additionally, the head mounted display device 32 may be AR/VR glasses, AR/VR helmets, or the like.
As shown in fig. 4, the digital audio signal output device is illustrated as a mobile phone, and the head-mounted display device 32 is AR glasses.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.
Claims (10)
1. An audio circuit, comprising:
an audio providing device configured to output an analog audio signal through an audio output;
a speaker playing component configured to perform a playing operation according to the received analog audio signal;
a headphone interface configured to transfer a received analog audio signal to a headphone connected to the headphone interface;
the first main switch corresponding to each sound channel comprises a first switch and a second switch, the first switch is connected between the audio output end and the input end of the loudspeaker playing component corresponding to the sound channel, and the second switch is connected between the audio output end and the corresponding sound channel end of the earphone interface; and the number of the first and second groups,
the connection detection end of the controller is connected with the earphone interface so as to detect whether the earphone interface is in a connection state of connecting an earphone or not; the first output end of the controller is connected with the control end of the first main switch, the controller is configured to output a control signal for controlling the first switch to be disconnected and controlling the second switch to be connected through the first output end when the earphone interface is detected to be in the connection state, and output a control signal for controlling the first switch to be connected and controlling the second switch to be disconnected through the first output end when the earphone interface is detected not to be in the connection state.
2. The circuit of claim 1, wherein the first master switch comprises an input contact, a first output contact, and a second output contact, wherein the first switch shares an input contact with the second switch, wherein the input contact and the first output contact comprise the first switch, and wherein the input contact and the second output contact comprise the second switch.
3. The circuit of claim 2,
the audio circuit further includes a second master switch corresponding to each channel, including a third switch and a fourth switch; the second master switch comprises a first input contact, a second input contact and an output contact, the third switch and the fourth switch share the output contact, the first input contact and the output contact form a third switch, and the second input contact and the output contact form a fourth switch; the third switch is connected between the second output contact of the second switch and the corresponding sound channel end of the earphone interface; the fourth switch is connected between a grounding end and a corresponding sound channel end of the earphone interface corresponding to the sound channel;
the second output end of the controller is connected with the control end of the second main switch, the controller is further configured to output a control signal for controlling the fourth switch to be disconnected and controlling the third switch to be connected through the second output end when the earphone interface is detected to be in the connection state, and output a control signal for controlling the fourth switch to be connected and controlling the third switch to be disconnected through the second output end when the earphone interface is detected not to be in the connection state.
4. The circuit of claim 3,
the controller is configured to, when detecting that the earphone interface is in the connection state, output a control signal for controlling the first switch to be disconnected and the second switch to be connected through the first output terminal, and output a control signal for controlling the fourth switch to be disconnected and the third switch to be connected through the second output terminal.
5. The circuit according to claim 3, wherein the controller is configured to, when detecting that the headphone interface is not in the connection state, output a control signal for controlling the fourth switch to be connected and the third switch to be disconnected through the second output terminal, and output a control signal for controlling the first switch to be connected and the second switch to be disconnected through the first output terminal.
6. The circuit of claim 1,
the third output end of the controller is connected with the control end of each power amplifier in the loudspeaker playing assembly, and the controller is configured to output a control signal for controlling the corresponding power amplifier to switch off the power supply through the third output end when detecting that the earphone interface is in the connection state, and output a control signal for controlling the corresponding power amplifier to switch on the power supply through the third output end when detecting that the earphone interface is not in the connection state.
7. The circuit of claim 1, wherein a fourth output terminal of the controller is connected to the control terminal of the audio providing apparatus, the controller is configured to output a control signal through the fourth output terminal to control the audio providing apparatus to output an audio parameter value according to the headphone when detecting that the headphone interface is in the connected state, output a corresponding analog audio signal at the audio output terminal, and output a control signal through the fourth output terminal to control the audio providing apparatus to output an audio parameter value according to the speaker playing component and output a corresponding analog audio signal at the audio output terminal when detecting that the headphone interface is not in the connected state.
8. The circuit according to any of claims 1-7, wherein the audio providing means is a USB audio codec.
9. A head-mounted display device comprising an audio circuit according to any of claims 1-8.
10. A head-mounted display system, comprising:
a digital audio signal output device, and a head-mounted display device as claimed in claim 9 above;
the digital audio signal output device configured to output a digital audio signal;
the input end of the audio providing device of the audio circuit in the head-mounted display equipment is connected with the output end of the digital audio signal output equipment for outputting the digital audio signal.
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| CN201922380318.8U CN211378222U (en) | 2019-12-25 | 2019-12-25 | Audio circuit, head-mounted display equipment and head-mounted display system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511954A (en) * | 2020-12-08 | 2021-03-16 | 南昌勤胜电子科技有限公司 | Stereo assembly and terminal equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112511954A (en) * | 2020-12-08 | 2021-03-16 | 南昌勤胜电子科技有限公司 | Stereo assembly and terminal equipment |
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