TWI599238B - Connection module for earphone, earphone device, and media playing system - Google Patents

Description

Headphone module, earphone device, and media player system

The present invention relates to a connector for a headphone, and more particularly to a headphone connector for providing charging and audio transmission.

In order to make the user portable, the research and development of mobile devices such as smart devices, media players, and notebook computers are constantly moving toward thinner, lighter weight, faster boot, and longer battery life. For example, among the many smart phones currently on the market, the mobile phone with the smallest body thickness is about 6mm~9mm; the thickness of the notebook computer can be reduced to about 1cm. Therefore, how to configure a variety of mechanisms, circuits, modules, batteries, etc. in the body space of a limited mobile device, so that the mobile device can meet the needs of users in terms of use and performance, so that it can be used well. The experience is really a big challenge for R&D personnel.

To this end, each manufacturer has improved the many hardware devices of the mobile device to save space. For example, the size of the interface connector of the universal serial bus (USB) is constantly evolving. For example, the standard USB 2.0 type A-type plug (standard-A) used in general desktop computers is 12x5mm, and many smart ones are currently available. The universal USB 2.0 micro-USB B-type of the mobile phone can be up to 6.85x1.8mm.

In addition, as the hardware design of the mobile device becomes thinner and lighter, the 3.5mm interface used by the conventional earphone audio is still configured to be compatible, so the earphone interface has affected the 靈 activity of the hardware design of the mobile device. Therefore, the market has used the USB interface to replace the headset of the 3.5mm interface. There are also manufacturers that use headphones that use Apple's Lightning connection interface.

Although the above-mentioned earphones are not limited by the 3.5mm headphone interface, at least four electrical contacts are still needed for the earphone interfaces, so the corresponding mechanism and circuit structure are complicated and need to use a larger size. For example, the USB interface has 4 electrical contacts (ie VBus, D+, D-, GND), and the Lightning connector has 8 electrical contacts (ie GND, L0p, L0n, ID0, PWR, L1n, L1p, ID1). Where GND represents the grounded contact, PWR (or VBus) is the power supply related contact, and other contacts are related to data transmission, identification or control.

Therefore, the connection between the earphone and the mobile device still needs to be improved to replace the traditional 3.5 mm earphone interface and contribute to the miniaturization of the mobile device.

In view of this, the present invention provides a connection technology between a headset and a mobile device, which can be implemented as a headset module, an earphone device, and a media playback system, respectively. With this connection technology, the earphone device can be electrically coupled to the electronic device through two electrical contacts, and can obtain power from the electronic device and can be used to play high-quality audio. Therefore, the connection technology can replace the traditional 3.5mm headphone interface, so that the headphone interface can be realized with a small volume, and the activity of the mobile device and the hardware configuration of the earphone is also improved.

According to an aspect of the present invention, a connection module for an earphone is provided for coupling between a sounding unit of an earphone and an electronic device to drive the sounding unit to emit sound. The connection module for the earphone comprises: two electrical contacts, a power audio output circuit, and an audio playback unit. The second electrical contact is electrically coupled to the electronic device in a wired manner. The power audio output circuit is electrically coupled to the two electrical contacts to receive an input signal of the electronic device, and is configured to output a first signal according to the input signal and rectify the input signal to output A power signal, wherein the power signal is used to charge the energy storage unit. The audio playback unit is electrically coupled to the power audio output circuit and the energy storage unit, and configured to receive the first signal, wherein the audio playback unit obtains power from the energy storage unit. When the first signal is a digital audio signal, the power audio output circuit is configured to rectify the digital audio signal to output the power signal, and the audio playback unit is configured to output the analog audio signal according to the first signal. Drive the sounding unit to make a sound.

In an embodiment, the connection module for the headset further includes: a wireless transmission unit, the wireless transmission unit is electrically coupled to the audio playback unit, and configured to wirelessly communicate with the electronic device, the wireless transmission unit Receiving power from the energy storage unit; wherein when the audio playback unit determines that the audio playback unit is disconnected from the electronic device based on the first signal, the audio playback unit is configured to activate the wireless transmission unit to transmit the wireless The transmission unit receives a second signal, and the audio playback unit is configured to output the analog audio signal according to the second signal to drive the sounding unit to emit sound.

In an embodiment, when the first signal is a low level signal and is maintained for at least a first time interval, the audio playback unit determines that the audio playback unit is disconnected from the electronic device.

In one embodiment, the power audio output circuit includes: a rectifier having two inputs and two outputs, the two input ends of the rectifier being electrically coupled to the two electrical contacts, wherein the two inputs of the rectifier One of the terminals is configured to output the first signal, and the two outputs of the rectifier are used to output the power signal.

In another embodiment, the power audio output circuit further includes: a first rectifier having two input ends and two output ends, wherein the two input ends of the first rectifier are electrically coupled to the two electrical contacts respectively; a second rectifier having two input ends and two output ends, wherein the two input ends of the second rectifier are electrically coupled to the two output ends of the first rectifier, wherein one of the two input ends of the second rectifier The first signal is output, and the two outputs of the second rectifier are used to output the power signal.

According to another aspect of the present invention, an earphone device is provided, comprising: a sounding unit; and the earphone connection module according to any of the above embodiments, which is electrically coupled to the sounding unit and is detachable The ground is electrically coupled to an electronic device to drive the sounding unit to emit sound.

According to still another aspect of the present invention, a media playback system is provided, comprising: an electronic device, and the above-described earphone device.

For a better understanding of the above and other aspects of the present invention, reference should be made

In the following, according to the connection technology of the earphone and the mobile device of the present invention, various embodiments of the earphone connection module, the earphone device, and the media playing system are respectively tested. However, the implementations of the present invention are not limited by the examples, and various arrangements, combinations, or variations of the embodiments may be included in the technical concept disclosed in the present invention.

1A shows a schematic block diagram of one embodiment of a media playback system. As shown in FIG. 1A, the media playback system 1 includes an earphone device 10 and an electronic device 20. The earphone device 10 includes a splicing module 100 and a sounding unit 190, which can be implemented as a monophonic left/right earphone or a stereo channel earphone according to the code of the digital signal transmission format, and can also be implemented to further include There is a single channel or two channel microphone. The earphone device 10 can also be implemented in various appearances or wearing manners, such as an earbud type, an ear canal type, an earhook type, a head mounted type, or an earmuff type. The electronic device 20 can be any electronic device capable of outputting a digital audio signal, such as a smart device, a media player, a notebook computer, etc., or a personal computer.

As shown in FIG. 1A, the earphone device 10 can be electrically coupled to the electronic device 20 through two electrical contacts, and can obtain power from the electronic device 20 and can be used to play high-quality audio. The connector or cable used between the earphone device 10 and the electronic device 20 can be implemented in various ways to achieve electrical coupling.

For example, as shown in FIG. 1A, the earphone device 10 is electrically connected to the electronic device 20 through the cable 15. The cable 15 includes a connector 151 and at least two wires 152. The two wires 152 are respectively electrically coupled to the two electrical contacts A1 and A2 of the earphone device 10; the connector 151 is detachably electrically connected to the electronic device 20 such that the two wires 152 are respectively associated with the electronic device 20. The electrical contacts B1 and B2 are electrically coupled.

In another embodiment, as shown in FIG. 1B, the earphone device 10 and the electronic device 20 are electrically connected by a cable 15 and a cable 25. For example, the cable 15 includes a connector 151 and at least two wires 152, and the cable 25 includes connectors 251, 253 and at least two wires 252. The two wires 152 are electrically coupled to the two electrical contacts A1 and A2 of the earphone device 10 respectively. The cable 25 is used for detachably electrically connecting the two electrical contacts B1, B2 and the cable of the electronic device 20. Between the connectors 151 of the line 15.

In the above embodiment, the electrical connection between the earphone device 10 and the electronic device 20 can be realized by a touch-sensitive magnetic splicing method. For example, in FIG. 1A, the electrical connection between the connector 151 of the cable 15 and the electronic device 20 can be implemented using a magnetic splicer; in FIG. 1B, the connector 151 of the cable 15 is connected to the cable 25. The electrical connection between the devices 251 and/or the electrical connection between the connector 253 of the cable 25 and the electronic device 20 can be achieved using a magnetic splicer. In this way, the earphone device 10 and the electronic device 20 do not need to be plugged and unplugged, and the knot is convenient and waterproof, and is suitable for use in a media player or a smart device.

However, the present invention does not limit the electrical connection between the earphone device 10 and the electronic device 20; therefore, in other embodiments, the plug-in male-female connection may also be used to implement the above electrical connection; or other For example, in FIG. 1B, the connector 253 of the cable 25 and the electronic device 20 can be connected by plug-in male and female connections, and between the connector 251 of the cable 25 and the connector 151 of the cable 15. It can be realized by a touch-type magnetic splicing method. In addition, in practice, the cable can be achieved by wrapping the wire with an insulator in various ways.

Moreover, in some embodiments, the media playback system 1 can be further implemented when the electrical connection between the earphone device 10 and the electronic device 20 is broken (for example, when the cable is not connected or the cable is removed) The earphone device 10 and the electronic device 20 can be automatically switched to be wirelessly connected, so that the earphone device 10 can start or continue to play audio under the wireless connection, or perform other communication or operation. In practice, this wireless connection may be in accordance with wireless communication standards or custom-defined protocols such as Bluetooth, infrared, or radio frequency. However, the present invention is not limited to the implementation of the wireless connection, when other wireless connections such as Wi-Fi, Zigbee, or other means may be employed.

Embodiments of the aforementioned splicing module 100 are discussed below. The splicing module 100 is coupled between the sounding unit 190 of the earphone and an electronic device 20 to drive the sounding unit 190 to emit sound.

2 shows a schematic block diagram of one embodiment of a splicing module 100. As shown in FIG. 2, the splicing module includes: two electrical contacts (such as A1 and A2), a power audio output circuit 101, an energy storage unit 103, an audio playback unit 105, and a wireless transmission unit 107.

The two electrical contacts, as shown in A1 and A2, are used to electrically couple the electronic device 20 in a wired manner. The power audio output circuit 101 is electrically coupled to the two electrical contacts to receive an input signal (indicated by Vin) of the electronic device 20, and is configured to output a first signal according to the input signal (eg, represented by V1) And for rectifying the input signal to output a power signal (as indicated by VP), wherein the power signal can be used to charge the energy storage unit 103.

The energy storage unit 103 is electrically coupled to the power audio output circuit 101 and configured to receive the power signal VP to store electrical energy. For example, the energy storage unit 103 can include at least a battery, a capacitor, or a super capacitor.

The audio playback unit 105 is electrically coupled to the power audio output circuit 101 and the energy storage unit 103, and is configured to receive the first signal V1, wherein the audio playback unit 105 obtains power from the energy storage unit 103. When the first signal V1 is a digital audio signal, the power audio output circuit 101 is used to rectify the digital audio signal to output the power signal VP, and the audio playback unit 105 is configured to follow the first signal V1. The analog analog signal is output to drive the sounding unit 190 to emit a sound. For example, the audio playback unit 105 can be implemented using at least a microprocessor, a digital signal processor, an audio processor, an audio single chip, or an audio codec. In some embodiments, when the first signal V1 is a digital audio signal, the encoding of the digital signal transmission format can be used to transmit the mono audio or the audio of the stereo channel, whereby the audio playback unit 105 According to the first signal V1, the sounding unit 190 is driven to emit a sound of a mono or stereo channel. For example, the channel coding method, such as MP3, or PCM, can be used, so the two audio contacts A1 and A2 can be used to transmit digital audio signals of various channels.

The wireless transmission unit 107 is electrically coupled to the audio playback unit 105 and the energy storage unit 103, and is configured to wirelessly communicate with the electronic device 20, and the wireless transmission unit 107 obtains power from the energy storage unit 103. The wireless transmission unit 107 is, for example, supporting at least one of Bluetooth, infrared, and radio frequency transmission. When the audio playback unit 105 determines that the audio playback unit 105 is disconnected from the electronic device 20 based on the first signal V1, the audio playback unit 105 is configured to activate the wireless transmission unit 107 to transmit the wireless transmission unit 107. Receiving a second signal, and the audio playback unit 105 is configured to output the audio signal according to the second signal to drive the sounding unit 190 to emit a sound. For example, the second signal is a signal transmitted by the electronic device 20 in a wireless manner.

For example, when the first signal V1 is a digital audio signal such as PWM, PCM, or MP3, the power audio output circuit 101 is used to rectify the digital audio signal to output the power signal VP. The audio playback unit 105 is configured to output the analog audio signal according to the first signal V1 to drive the sounding unit 190 to emit a sound. Certainly, the format of the present invention for the first signal V1 to be a digital audio signal is not limited by the above examples, and the digital audio signal can be any format such as WMA, M4A, AAC, 3GP, or AIFF. To this end, the audio playback unit 105 can implement, by stylization, converting the format of one or more digital audio signals into an audio signal capable of driving the sounding unit 190.

In an embodiment, when the audio playback unit 105 determines that the audio playback unit 105 is disconnected from the electronic device 20 based on the first signal V1, the audio playback unit 105 is configured to activate the wireless transmission unit 107 to transmit The wireless transmission unit 107 receives a second signal, and the audio playback unit 105 is configured to output an audio signal according to the second signal to drive the sounding unit 190 to emit a sound.

In implementation, the manner in which the audio playback unit 105 determines that the audio playback unit 105 is disconnected from the electronic device 20 can be implemented in various manners. In an embodiment, when the first signal V1 is a low level signal and is maintained for at least one time interval (eg, 5 seconds, 7 seconds, or 10 seconds, etc.), the audio playback unit 105 determines to interrupt the connection. In addition, the audio playback unit 105 can also be configured to monitor the load on the cable. When the cable is separated from the earphone device, the wireless transmission unit 107 can be activated after the high impedance is measured without the load of the earphone.

Although the above embodiment is exemplified by the use of two electrical contacts, the present invention is not limited to having only two electrical contacts for the connector, and the connector may have three or more electrical contacts for other purposes. . For example, FIG. 3 shows a schematic block diagram of another embodiment of a splicing module 100. As shown in FIG. 3, the splicing module may further include: a radio unit 109 electrically coupled to the audio playback unit 105 and configured to receive sound and output audio audio. The sound pickup unit 109 includes, for example, at least one microphone. In an embodiment, based on the splicing module 100 of FIG. 3, the earphone device 10 can be implemented as an earphone microphone. In this embodiment, at least one electrical contact A3 can be added and electrically coupled to the earphone device. The audio playback unit 105 transmits the collected audio processed by the audio playback unit 105 to the electronic device 20. In addition, the radio audio can be transmitted as an analog or digital signal as needed; the radio audio can also be mono or stereo. In one embodiment, the radio audio system transmits the audio of the stereo channel by using a digital signal, and can be transmitted by at least one electrical contact A3 through a channel encoding method such as MP3 or PCM.

The implementation of the power audio output circuit 101 is discussed below. In any of the above embodiments, the power audio output circuit 101 can be implemented using at least one rectifier. The rectifier has two input ends and two output ends. The two input ends of the rectifier are electrically coupled to the two electrical contacts and can be used to receive the input signal Vin of the electronic device 20. For example, one of the two input terminals of the rectifier is used to output the first signal V1, and the two outputs of the rectifier are electrically coupled to the energy storage device 103 to output the power signal VP to the Energy storage device 103.

Figure 4 shows a schematic block diagram of one embodiment of a power audio output circuit. In FIG. 4, the power audio output circuit 101A includes a rectifier 110A, an output circuit 120A, and a filter 130A. The rectifier 110A is coupled between the output circuit 120A and the filter 130A. For example, the rectifier 110A has two input ends and two output ends. The two input ends of the rectifier 110A are electrically coupled to the two electrical contacts A1 and A2, respectively, and can be used to receive the input signal Vin of the electronic device 20. . For example, one of the two input ends of the rectifier 110A is configured to output the first signal V1, and the two outputs of the rectifier 110A are electrically coupled to the energy storage device 103 through the filter 120A to output the The power signal VP is sent to the energy storage device 103. For example, the rectifier 110A is a half-wave rectifier, for example, including a diode D. The filter 120A includes, for example, a capacitor C. The first signal V1 is rectified and filtered by the rectifier 110A and the filter 120A to generate power in the filter 120A. In addition, the power audio output circuit 101A includes an output circuit 120A (which is a load) such as a resistor RL, and an upper end thereof for outputting the first signal V1 as an audio output signal.

Figure 5 shows a schematic block diagram of another embodiment of a power audio output circuit. In FIG. 5, the power supply audio output circuit 101B includes a rectifier 111B, a rectifier 112B, an output circuit 120B, and a filter 120B. The output circuit 120B is coupled between the rectifier 111B and the rectifier 112B. The rectifier 111B has two input ends and two output ends. The two input ends of the rectifier 111B are electrically coupled to the two electrical contacts A1 and A2, respectively. The rectifier 112B has two input ends and two output ends. The two input ends of the rectifier 112B are electrically coupled to the two output ends of the rectifier 111B, wherein one of the two input ends of the rectifier 112B is used to output the first The signal is V1, and the two outputs of the rectifier 112B are electrically coupled to the energy storage device 103 through the filter 120B to output the power signal VP to the energy storage device 103.

The embodiment of the power audio output circuit 110B shown in FIG. 5 uses a full-wave rectifier, so that the input signal Vin can be input from any input of the power audio output circuit 110B.

Please refer to FIG. 6, which shows a schematic diagram of an embodiment of the power audio output circuit of FIG. For example, rectifier 111B is a full wave rectifier, such as a bridge rectifier, which includes a plurality of diodes such as D1-D4. The rectifier 112B is a half-wave rectifier, such as including a diode D5. Filter 120A is a low pass filter, for example comprising a capacitor C1. The first signal V1 is rectified and filtered by the rectifiers 111B, 112B and the filter 120B to generate a power signal VP in the filter 120B. In addition, the power audio output circuit 101B includes an output circuit 120B (which is a load) such as a resistor RL. The upper end is configured to output the first signal V1 as an audio output signal.

As shown in FIG. 6, if a pulse wave audio input signal is received from a wire connected to the electrical contact A1 (assuming the electrical contact A2 is grounded), the input signal passes through the diode D1 of the rectifier 111B, and then passes through the rectifier. The diode D5 of 112B and the capacitor C1 of the filter 120B are filtered, and a power signal is generated at the end of the capacitor C1 of the filter 120B, and the upper end of the resistor RL of the output circuit 120B is an audio output signal, wherein the diodes D1 and D3 The system is turned on, and the diodes D2 and D4 are not turned on. As shown in FIG. 6, if the pulse wave input signal is received from the wire connecting the electrical contact A2, the power signal is also generated at the end of the filter 120B, and the audio output signal is generated at the upper end of the output circuit 120B. The polar bodies D2 and D4 are turned on, and the diodes D1 and D3 are not turned on. Therefore, no matter how the wires connecting the electrical contacts A1 and A2 are connected to the external electronic device, the power signal can be obtained as the charging power on the filter 120B, and the first signal V1 is obtained on the output circuit 120B (ie, the audio output is obtained). Signal)).

In addition, in an embodiment, when the electronic device 20 stops transmitting the pulse wave audio input signal, the power can be changed. For example, the electronic device 20 outputs a constant voltage (such as 1V, 2V, 3V, or 5V, etc.) to connect the electrical connection. On one of the turns of the points A1 and A2, the power signal can be obtained as the charging power on the filter 120B, and the first signal V1 (ie, the constant DC signal) is obtained on the output circuit 120B.

The audio playback unit 105 includes a microprocessor to process the audio signal of the pulse wave, and then output to the sound unit to play the audio. In an embodiment, when the audio playback unit 105 detects that the first signal V1 is at a low level within a time interval, it can be determined that the cable has been disconnected or disconnected from the electronic device 20, and then the device can be started. The wireless transmission unit 105 (such as the Bluetooth module) continues to receive the audio signals transmitted by the electronic device 20 in a wireless manner.

In the embodiment of the power audio output circuit 110B of FIG. 6 above, the rectifier 11B is exemplified by a diode rectifier of the diode, and the rectifier 112B is exemplified by a half-wave rectifier of a diode; however, the present invention is implemented Without being limited by this example, other rectifiers and/or other circuit components such as resistors, capacitors, or inductors may be combined to achieve rectification and output power signals for supplying internal use of the earphone device 10 or for charging the energy storage unit 103. effect. For example, it can be any linear power converter or switched power converter.

Additionally, in some embodiments, the sounding unit 190 can include at least one speaker to emit sound; it can also include at least two speakers to emit a stereo sound. In addition, the sounding unit 190 may also include other circuit components, such as filters or circuit components, to effect sounding. Furthermore, in other embodiments, the anti-noise circuit can be configured to implement anti-noise in the earphone device or the connection module, or implement anti-noise in the audio playback unit in a software manner.

Figure 7 shows a schematic block diagram of one embodiment of an electronic device in a media playback system. As shown in FIG. 7, the electronic device 20 includes a port 201, a wire drive circuit 203, a processing unit 205, a wireless transmission unit 209, and a memory unit 210. The port 201 has at least two conductor connections (as indicated by B1 and B2). The wire drive circuit 203 is coupled to the port 201, the processing unit 205, and the DC power source 207, and is configured to output a signal to a load (such as a cable or other external device) to which the port 201 is connected. The processing unit 205 is electrically coupled to the wire driving circuit 203 and configured to generate an input signal to the earphone device 10.

In addition, the electronic device 20 generates a different input signal to the earphone device 10 as its operation mode changes.

For example, when the electronic device 20 is in the play mode, the input signal is a digital audio signal. For example, the electronic device 20 generates a digital audio signal according to an audio source. For example, the audio source is: audio data (or file) in the built-in memory, audio data (or file) of the external memory card, audio data of the network stream, or audio data generated by the electronic device 20 itself, Or an external audio input. The processing unit 205 processes the audio signal or reads the audio data by any of the audio sources to generate digital audio data, and then sends the pulsed audio signal (such as PWM, PCM, MP3 or other digital audio signals) to the port. The drive circuit 203 is further transmitted to the earphone device 10 via the connection port 201 and through the cable. Moreover, in some embodiments, processing unit 205 can generate mono-channel digital audio, or stereo channel digital audio, depending on the encoding of the digital signal transmission format. For example, the channel coding method, such as MP3, or PCM, can be used. Therefore, the two audio contacts B1 and B2 can be used to transmit digital audio signals of various channels.

When the electronic device 20 is in the power supply mode, the input signal is a direct current signal. For example, when the electronic device 20 does not perform audio transmission, the power supply mode can be entered, and the connection unit 205 is controlled by the processing unit 205 to connect the DC power supply to the cable connected to the electrical contact, thereby providing the earphone device 10 with charging power.

In an embodiment, when the electronic device 20 is disconnected from the earphone device 10, the processing unit 205 is configured to activate the wireless transmission unit 209 to transmit a wireless signal (such as the foregoing second signal) through the wireless transmission unit 209. This communicates wirelessly with the headset device 10 for audio playback or other functional operations.

In implementation, the manner in which the processing unit 205 activates the wireless transmission unit 209 can be implemented in a variety of manners. In an embodiment, the processing unit 205 can be configured to monitor the load on the cable. When the cable is separated from the earphone device 10, the wireless transmission unit 209 can be activated after the high impedance is measured without the load of the earphone.

Figure 8 shows a schematic block diagram of one embodiment of a wire drive circuit. As shown in FIG. 8, when the audio signal Si outputted by the processing unit 205 is high, the transistor N1 (such as NMOS) is turned on and the transistor N2 (such as PMOS) is opened, so that the cable connected to the electrical contact B1 is connected. The line is high, and if the audio signal Si is low, the transistor N2 is turned on and the transistor N1 is opened, so that the cable connected to the electrical contact B1 is low, so the cable output signal So potential will follow the audio. Signal Si changes. However, the wire drive circuit of the present invention is not limited by the above examples, and other circuits such as N-MOS or P-MOS and any circuit that can drive the wires can be used.

In addition, in some embodiments, the foregoing energy storage unit may be realized by using a lithium battery or a lithium polymer battery, and the battery capacity thereof is 100 mAh or more. In addition, various small batteries can be used in series and in parallel to increase the endurance of the earphone device. In addition, in one embodiment, a lithium battery code-named CG-320 can be used by Panasonic at the end of 2014. The diameter is 3.5 mm, the height is about 2 cm, the weight is about 0.6 gram, and the volume is about 1/20 of the AAA battery. The capacity is 13mAh. However, implementations of the invention are not so limited. For example, Samsung's ultra-small Pin battery can be used, which has a capacity of 10 mAh, a length of 20 mm, and a diameter of 3.6 mm. In addition, it can also be realized by a curved battery or a flexible battery. It can also be realized by using a paper battery. For example, such as ultra-thin soft-plate lithium ceramic battery (FLCB; FPC Lithium-Ceramic Battery).

As shown in the above embodiments, with the connection technology of the present invention, the earphone device can be electrically coupled to the electronic device through two electrical contacts, and can obtain power from the electronic device and can be used to play high-quality audio. In addition, a new headset application mode, such as the wireless usage mode of the headset device or other functional applications, can be further extended.

As in some of the foregoing embodiments, the connection technique allows for the transmission of digital audio data in various formats between the electronic device and the earphone device. In another embodiment, the earphone device can be connected to the electrical connection of the two electrical contacts, and the earphone device can obtain power supply and receive input audio. In addition, the earphone device can automatically determine whether the electronic device of the earphone and the audio player is connected by a cable, and automatically switches to a wireless node when the line is twisted, so that the audio can continue to be played. In addition, in some of the foregoing embodiments, the electrical junction between the earphone and the audio playback device can be connected by magnetic contact, without plugging and unplugging, and the knot is convenient and waterproof, and is suitable for use in a thin and smart device.

For example, in some embodiments, the foregoing earphone device may further be provided with a function operation interface device to connect with an electronic device (such as a smart device) to perform functions such as receiving, rejecting an incoming call, or making a voice call. In other embodiments, the foregoing splicing module can be configured as a splicing device independent of the electronic device and the earphone and has a 3.5 mm male or female interface; thus, the earphone that is traditionally only supports the 3.5 mm interface can be connected thereto. The function of the above earphone device is generated by splicing the device.

In this way, the connector of the earphone can realize the function of transmitting power and playing high-quality audio output by using at least two electrical connections, so the connection technology can replace the traditional 3.5mm headphone interface, and the earphone interface can be realized by a small volume. The activity of the mobile device and the hardware configuration of the earphones is also improved.

In summary, the content of the present invention has been exemplified by the above embodiments, but the present invention is not limited to the embodiments. It will be apparent to those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the invention. For example, the technical contents illustrated in the foregoing embodiments may be combined or changed. As a new embodiment, these embodiments are of course considered as one of the contents of the present invention. Therefore, the scope of the patent to be protected in this case also includes the scope of the patent application and the scope defined by it.

1‧‧‧Media playback system
10‧‧‧ headphone device
15‧‧‧ cable
20‧‧‧Electronic devices
25‧‧‧ Cable
100‧‧‧Audio connection module for headphones
101, 101A, 101B‧‧‧ power audio output circuit
103‧‧‧ Energy storage unit
105‧‧‧Audio playback unit
107‧‧‧Wireless transmission unit
109‧‧‧ Radio unit
110A‧‧‧Rectifier
120A‧‧‧Output circuit
130A‧‧‧ filter
111B, 112B‧‧‧Rectifier
120B‧‧‧Output circuit
130B‧‧‧Filter
151‧‧‧Connector
152‧‧‧ wire
190‧‧‧ Sounding unit
201‧‧‧Links
203‧‧‧Wire drive circuit
205‧‧‧Processing unit
207‧‧‧DC power supply
209‧‧‧Wireless transmission unit
251, 253‧‧‧ connectors
252‧‧‧ wire
190‧‧‧ Sounding unit
A1, A2, A3‧‧‧ electrical contacts
B1, B2‧‧‧ electrical contacts
C, C1‧‧‧ capacitor
D1, D2, D3, D4‧‧‧ diodes
Vin‧‧‧ input signal
V1‧‧‧ first signal
VP‧‧‧Power signal
Si‧‧‧ audio signal
So‧‧‧ cable output signal

1A shows a schematic block diagram of one embodiment of a media playback system. Figure 1B shows a schematic block diagram of another embodiment of a media playback system. Figure 2 shows a schematic block diagram of one embodiment of a splicing module. Figure 3 shows a schematic block diagram of another embodiment of a splicing module. Figure 4 shows a schematic block diagram of one embodiment of a power audio output circuit. Figure 5 shows a schematic block diagram of another embodiment of a power audio output circuit. Figure 6 shows a schematic block diagram of one embodiment of the power audio output circuit of Figure 5. Figure 7 shows a schematic block diagram of one embodiment of an electronic device in a media playback system. Figure 8 shows a schematic block diagram of one embodiment of a wire drive circuit.

1‧‧‧Media playback system

10‧‧‧ headphone device

15‧‧‧ cable

20‧‧‧Electronic devices

100‧‧‧Connecting module

151‧‧‧Connector

152‧‧‧ wire

190‧‧‧ Sounding unit

A1, A2‧‧‧ electrical contacts

B1, B2‧‧‧ electrical contacts

Claims (9)

A connection module for an earphone is coupled between the sounding unit of the earphone and an electronic device to drive the sounding unit to emit sound, and the connection module for the earphone comprises: two electrical contacts, which are used for wired The method is electrically coupled to the electronic device; the power audio output circuit is electrically coupled to the two electrical contacts for receiving an input signal from the electronic device, and outputting a first signal and a power signal. The power signal is used to charge an energy storage unit; and the audio playback unit is electrically coupled to the power audio output circuit and configured to receive the first signal, wherein the audio playback unit is obtained from the energy storage unit. Power, wherein when the first signal is a digital audio signal, the power audio output circuit rectifies the digital audio signal to output the power signal, and the audio playback unit outputs the analog audio signal according to the first signal. Driving the sounding unit to emit a sound; when the first signal is a direct current signal, the power audio output circuit outputs the power based on the direct current signal number. The headset connection module of claim 1, wherein the headset connection module further comprises: a wireless transmission unit, the wireless transmission unit is electrically coupled to the audio playback unit, and is configured to wirelessly Electronic device communication, the wireless transmission unit obtains power from the energy storage unit; wherein when the audio playback unit determines that the audio playback unit is disconnected from the electronic device based on the first signal, the audio playback unit is used to start The wireless transmission unit is configured to receive a second signal through the wireless transmission unit, and the audio playback unit is configured to output the analog audio signal according to the second signal to drive the sounding unit to emit a sound. The headset connection module of claim 2, wherein when the first signal is a low level signal and is maintained for at least a first time interval, the audio playback unit determines that the audio playback unit is disconnected from the electronic device. The headphone connection module of claim 1, wherein the power audio output circuit comprises: a rectifier having two input ends and two output ends, wherein the two input ends of the rectifier are electrically coupled to the two electrical contacts respectively And wherein one of the two input ends of the rectifier is used to output the first signal, and the two outputs of the rectifier are used to output the power signal. The headphone connection module of claim 1, wherein the power audio output circuit further comprises: a first rectifier having two input ends and two output ends, wherein the two input ends of the first rectifier are respectively associated with the two electrical The second rectifier has two input ends and two output ends, and the two input ends of the second rectifier are electrically coupled to the two output ends of the first rectifier, wherein the second rectifier One of the two inputs is used to output the first signal, and the two outputs of the second rectifier are used to output the power signal. The earphone connection module of claim 1, wherein when the first signal is a digital audio signal of PWM, PCM, or MP3, the power audio output circuit is configured to rectify the digital audio signal and output the same. The power signal, and the audio playing unit is configured to output an analog audio signal according to the first signal to drive the sounding unit to emit sound. An earphone device, comprising: a sounding unit; and the earphone connection module according to any one of claims 1 to 5, which is electrically coupled to the sounding unit and is detachably coupled to an electronic device Electrically coupled to drive the sounding unit to emit sound. A media playback system, comprising: an electronic device, comprising: a connection port having at least two conductor connection ends; a wire drive circuit coupled to the connection port; and a processing unit electrically coupled to the wire drive The circuit is configured to generate an input signal; wherein when the electronic device is in the play mode, the input signal is a digital audio signal; the earphone includes a sounding unit; and the connection module is coupled to the earphone The sounding unit and the electronic device are configured to drive the sounding unit to emit sound, and the connecting module comprises: two electrical contacts for detachably electrically coupling the connection with the electronic device in a wired manner; a power audio output circuit electrically coupled to the two electrical contacts for receiving the input signal and outputting a first signal and a power signal, wherein the power signal is used to charge an energy storage unit; and the audio signal a playback unit electrically coupled to the power audio output circuit and configured to receive the first signal, wherein the audio playback unit obtains power from the energy storage unit, wherein When the first signal is a digital audio signal, the power audio output circuit rectifies the digital audio signal to output the power signal, and the audio playback unit drives the sounding unit to emit sound according to the first signal; When the electronic device is in the power supply mode, the input signal is a direct current signal; when the first signal is a direct current signal, the power audio output circuit outputs the power signal based on the direct current signal. The media playback system of claim 8, wherein the connection module further comprises: a wireless transmission unit electrically coupled to the audio playback unit and configured to wirelessly communicate with the electronic device, the wireless transmission unit obtaining power from the energy storage unit; wherein the audio playback unit And determining, by the first signal, that the audio playback unit is disconnected from the electronic device, the audio playback unit is configured to activate the wireless transmission unit to receive a second signal through the wireless transmission unit, and the audio playback unit is used by the audio playback unit. The sounding unit is driven in accordance with the second signal to emit a sound.