CN201590889U - Stereosonic bluetooth headset - Google Patents

Stereosonic bluetooth headset Download PDF

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Publication number
CN201590889U
CN201590889U CN2009203503844U CN200920350384U CN201590889U CN 201590889 U CN201590889 U CN 201590889U CN 2009203503844 U CN2009203503844 U CN 2009203503844U CN 200920350384 U CN200920350384 U CN 200920350384U CN 201590889 U CN201590889 U CN 201590889U
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CN
China
Prior art keywords
bluetooth
module
audio
micro
usb interface
Prior art date
Application number
CN2009203503844U
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Chinese (zh)
Inventor
孙浩
李德华
Original Assignee
歌尔声学股份有限公司
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Publication date
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Priority to CN2009203503844U priority Critical patent/CN201590889U/en
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Publication of CN201590889U publication Critical patent/CN201590889U/en

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Abstract

The utility model provides a stereosonic bluetooth headset, which comprises a bluetooth functional module, a power supply module, an electroacoustic conversion module and an MICRO-USB interface, wherein the power supply module is connected in series between the MICRO-USB interface and the bluetooth functional module, and is used for being changed from the MICRO-USB interface and supplying electric power for the bluetooth functional module. In addition, the stereosonic bluetooth headset further comprises a bluetooth/wired audio-frequency switching module; the bluetooth/wired audio-frequency switching module is electrically connected with the bluetooth functional module, the electroacoustic conversion module and the MICRO-USB interface respectively, and is used for realizing the switching between wired audio-frequency input signals and bluetooth audio-frequency input signals; and the wired audio-frequency input and the charging input share one MICRO-USB interface. The utility model realizes wired and wireless multiplexing of the bluetooth headset, and meets the different use demands of consumers; moreover, the wired audio-frequency input and the charging input share one interface, thereby saving board layout space.

Description

I tech clip S

Technical field

The utility model relates to the bluetooth earphone technical field, specifically, relates to a kind of bluetooth earphone with wireline interface and decrease of noise functions.

Background technology

Along with the fast development of modern communications technology, the use of electronic equipments such as mobile phone is increasingly extensive, but because there is bigger electromagnetic radiation in mobile phone etc., may cause certain hidden danger to user's health.Under this technical background, the bluetooth earphone of short range wireless transmission technology has appearred using, microphone, electroacoustic modular converter 5 are separated from the space with mobile phone, make user's mobile phone maintenance certain distance stronger when using mobile phone with radiation, need not simultaneously handheld device during user's communication, it is more succinctly convenient to use, and especially waits in driving to make bimanual occasion.

But existing bluetooth earphone can only be connected with wireless bluetooth device usually, just becomes a kind of ornaments when the user does not use bluetooth equipment, may also need to buy in addition wired earphone in the time of listening to the music, and has increased use cost, carries also comparatively inconvenience.As the I tech clip S that is provided in the patent documentation of publication number for CN101373993, comprise bluetooth transceiver, internal loudspeaker, microphone and source of sound output port, wherein bluetooth transceiver in order to electronic installation with the wireless mode receiving and transmitting signal; Internal loudspeaker is in order to play from the audio signal that electronic installation received; Microphone electrically connects bluetooth transceiver; The source of sound output port is connected to external loudspeaker via connecting line and plays.

And common bluetooth earphone is subject to the influence of environmental noise when conversation, and speech quality is relatively poor in noisy environment, also brings inconvenience to the user.

The utility model content

In order to overcome the defective that exists in the above-mentioned prior art, the utility model provides a kind of multiplexing I tech clip S that can realize existing I tech clip S function and wired earphone function; And in order to save cost and cloth board space, and then make earphone exquisite more small and exquisite, the utility model can also make wireline audio input and bluetooth charging import a shared interface.

To achieve these goals, the invention provides a kind of I tech clip S, comprise Bluetooth function module, power module, electroacoustic modular converter and MICRO-USB interface, wherein said power module is connected in series between MICRO-USB interface and the Bluetooth function module, be used for accepting charging and electric power being supplied with described Bluetooth function module from described MICRO-USB interface

In addition, according to I tech clip S of the present invention, also comprise bluetooth/wireline audio handover module, be electrically connected with Bluetooth function module, electroacoustic modular converter and MICRO-USB interface respectively, be used to realize the switching between wireline audio input signal and the Bluetooth audio frequency input signal; And wireline audio input and the shared MICRO-USB interface of charging input.

In addition, preferred construction is, comprises Tip element in described bluetooth/wireline audio handover module, is used to hang down give instructions by telegraph prompting alert and/or that signal switches.

In addition, preferred construction is, comprises noise reduction module in the described Bluetooth function module, is used for the wireless audio signal that described Bluetooth function module receives carried out that echo is suppressed and the noise attentuation processing.

In addition, preferred construction is that described noise reduction module comprises two MIC speech detection circuit and Dolby circuit.

In addition, preferred construction is that described MICRO-USB interface has five pins; Wherein, first pin is connected the charging input with the 5th pin, and wherein first pin connects the charger power supply, and the 5th pin connects charger ground; Second pin, the 3rd pin, the 5th pin connect the wireline audio input, and wherein second pin connects the input of L channel audio frequency, and the 3rd pin connects right audio channel input, the 5th pin ground connection; The 4th pin is electrically connected the Bluetooth function module.

Moreover preferred construction is that described bluetooth/wireline audio handover module comprises two audio switch respectively the bluetooth earphone left and right sound channels being controlled.

The I tech clip S that the utility model provides both can realize that wireless speech was connected with bluetooth communication equipment, use as I tech clip S, have the wireline audio input interface again, can be used as common wired earphone and use, satisfied the different user demand of consumer.In addition, in the utility model, the cloth board space has been saved in wireline audio input and the shared interface of charging input, has reduced accessory, has reduced cost, makes earphone exquisite more small and exquisite, makes things convenient for the consumer to portably use.At last, the noise reduction module that realizes by two MIC speech detection and Dolby circuit can effective attenuation echo and surrounding enviroment noise, even make the user still can the enjoy high quality voice communication in noisy environment.

Description of drawings

By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present utility model and technological merit will become apparent and understand easily.

Fig. 1 is the structural representation of expression the utility model first embodiment;

Fig. 2 is the structural representation of the preferred embodiment of expression first embodiment

Fig. 3 is that preferably charging, wireline audio are imported shared MOCRO-USB interface circuit and bluetooth/wireline audio commutation circuit figure in the utility model;

Fig. 4 represents the structural representation of the utility model second embodiment;

Fig. 5 is the circuit diagram of noise reduction module among second embodiment.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done further detailed description.

First embodiment

Fig. 1 is the structural representation of expression the utility model first embodiment.As shown in Figure 1, bluetooth earphone of the present utility model comprises Bluetooth function module 1, power module 2, bluetooth/wireline audio handover module 4, electroacoustic modular converter 5 and MICRO-USB interface 6.

Wherein, Bluetooth function module 1 is used for the signal of short-distance wireless reception from other communication devices (as mobile phone, PDA, notebook computer etc.); Power module 2 is electrically connected with MICRO-USB interface 6, Bluetooth function module 1 and bluetooth/wireline audio handover module 4 respectively, and this power module 2 can use independently disposable battery to power as bluetooth earphone, also can use built-in rechargeable battery; It is power module 2 chargings that MICRO-USB interface 6 is used for by using the external charge device, and conduct is by the interface of wired external audio frequency signal source; Bluetooth/wireline audio handover module 4 is electrically connected with Bluetooth function module 1 and MICRO-USB interface 6 respectively, is used to realize the automatic switchover processing of wireline audio input signal and Bluetooth audio frequency input signal; Electroacoustic modular converter 5 is electrically connected with bluetooth/wireline audio handover module 4, is used to receive bluetooth input audio signal or wired input audio signal, realizes the electroacoustic conversion.

In the present embodiment, wireline audio input and charging input are connected to same MICRO-USB interface.When insert MICRO-USB interface 6 be charger the time, just the battery in the power module 2 is charged by the charging circuit in the power module 2.When the user passed through MICRO-USB interface 6 external audio frequency signal sources, then bluetooth/wireline audio handover module 4 directly was connected to electroacoustic modular converter 5 with the external audio frequency signal, and this moment, this bluetooth earphone can be used as common wired earphone use.

An embodiment preferred as present embodiment also comprises Tip element 401 in bluetooth/wireline audio handover module 4, and this Tip element can be indicator light, sounding siren or other the signal sound-producing device that can point out the user to note.Tip element 401 is electrically connected with MICRO-USB interface 6, Bluetooth function module 1 and power module 2 respectively, is used to hang down give instructions by telegraph police, signal switch prompting etc.The structure of this preferred embodiment as shown in Figure 2.

As previously mentioned, when the user passes through MICRO-USB interface 6 external audio frequency signal sources, if Bluetooth function module 1 off-duty, then bluetooth/wireline audio handover module 4 directly is connected to electroacoustic modular converter 5 with the external audio frequency signal, and this moment, this bluetooth earphone can be used as common wired earphone use; If the Bluetooth function module is operated in running status during the external audio frequency signal source, then Tip element 401 mode of warning by indicator light or sound is pointed out the user, the user can select blue teeth wireless input or wireline audio input according to the wish of oneself, thereby realizes the bumpless transfer between blue teeth wireless input and the wireline audio input.

Fig. 3 is that preferably charging, wireline audio are imported shared MOCRO-USB interface circuit and bluetooth/wireline audio commutation circuit figure in the utility model.Shown in Fig. 3 circuit, wireline audio input and the shared MICRO-USB interface 6 of charging input, MICRO-USB interface 6 has 5 pins, is respectively the first pin Pin 1, the second pin Pin 2, the 3rd pin Pin3, the 4th pin Pin 4 and the 5th pin Pin5.The charging input connects the Pin 1 and the Pin 5 of MICRO-USB interface 6, and wherein Pin 1 connects the charger power supply, and Pin 5 connects charger ground; The wireline audio input connects Pin 2, Pin 3, the Pin 5 of MICRO-USB interface 6, and wherein Pin 2 connects the input of L channel audio frequency, and Pin 3 connects right audio channel input, Pin 5 ground connection.GPIO (the GeneralPurpose Input Output that the Pin 4 of MICRO-USB interface 6 is electrically connected in the Bluetooth function module 1, universal input and output port), be used to detect this bluetooth earphone whether bluetooth external audio frequency signal is arranged, with control bluetooth/wireline audio handover module 4, make electroacoustic modular converter 5 connect wireline audio input signal or bluetooth input signal.

Certainly, the Pin 4 of MICRO-USB interface 6 also can by bluetooth/wireline audio handover module 4 indirectly with Bluetooth function module 1 in GPIO be electrically connected to fetch and detect this bluetooth earphone whether bluetooth external audio frequency signal is arranged, carry out the switching of wireline audio input signal or bluetooth input signal to control bluetooth/wireline audio handover module 4.

On the other hand, the operating state of the I tech clip S that the utility model provides can be changed between wireline audio and Bluetooth audio frequency, accordingly, the signal content that the Pin 4 of MICRO-USB interface 6 is monitored also can be changed between wireline audio signal and Bluetooth audio frequency signal, rather than only is confined to above-mentioned detection whether bluetooth external audio frequency signal is arranged.Specifically, when bluetooth earphone had been used to answer the Bluetooth audio frequency signal, whether the Pin 4 of MICRO-USB interface 6 transfers to monitor had the wireline audio signal to insert, if having, then points out the user to make and answers selection; And when bluetooth earphone had been used to answer the wireline audio signal, whether the Pin 4 of MICRO-USB interface 6 transfers to monitor had the Bluetooth audio frequency signal to insert, if having, pointed out the user to make equally and answered selection.

In bluetooth shown in Figure 3/wireline audio handover module circuit diagram, U1, U2 are audio switch, are used to realize the switching controls of wireline audio input and Bluetooth audio frequency input.Wireline audio input L channel connects the NC1 Pin pin of U2, and the ground of wireline audio input connects the NC2 Pin pin of U2; Bluetooth audio frequency input L channel connects NO1, the NO2 Pin pin of U2; The IN1 of U2, IN2 Pin pin meet the GPIO of Bluetooth function module 1, are used to realize the stripping and slicing control of different audio input signals; The COM1 of U2, COM2 Pin pin connect the electroacoustic modular converter 5 of left ear; The power supply Pin pin VCC of U2 connects power module.When using as I tech clip S, IN1, the IN2 Pin pin of the GPIO control U2 by Bluetooth function module 1 make COM1 and the NO1 conducting of audio switch, COM2 and NO2 conducting, and then 5 receptions of electroacoustic modular converter is the bluetooth left channel audio signal; When connecting external source of audio signals when using as common wired earphone, if Bluetooth function module 1 is in running order, then the Bluetooth function module is by detecting the variation of MICRO-USB Pin 4 states, IN1, the IN2 Pin pin of control U2, make the COM1 and the NC1 conducting of audio switch, COM2 and NC2 conducting, what then electroacoustic modular converter 5 received is the audio signal of wired input; When connecting outside wireline audio signal, if bluetooth module is in off-mode, this moment, U2 was default conditions, COM1 and NC1 conducting, COM2 and NC2 conducting, 5 receptions of electroacoustic modular converter be the audio signal of wired input.Switching controls wired and Bluetooth audio frequency input R channel realizes that by U1 its connection and control principle are the same, are not repeated at this.

Second embodiment

Fig. 4 represents the structural representation of the utility model second embodiment.Different with first embodiment is in the Bluetooth function module of present embodiment, to have increased the noise reduction module that can make bluetooth earphone realize echo inhibition and noise attentuation function.

As shown in Figure 4, bluetooth earphone comprises Bluetooth function module 1, power module 2, bluetooth/wireline audio handover module 4, electroacoustic modular converter 5, MICRO-USB interface 6 and noise reduction module 7.Wherein, Bluetooth function module 1 is used for the signal of short-distance wireless reception from other communication devices (as mobile phone, PDA, notebook computer etc.); Power module 2 is electrically connected with MICRO-USB interface 6, Bluetooth function module 1; MICRO-USB interface 6 is used for by using the external charge device as power module 2 chargings, also as the interface by wired external audio frequency signal source; Bluetooth/wireline audio handover module 4 is electrically connected with Bluetooth function module 1 and MICRO-USB interface 6, is used to realize the automatic switchover processing of wireline audio input signal and Bluetooth audio frequency input signal; Electroacoustic modular converter 5 is electrically connected with bluetooth/wireline audio handover module 4, is used to receive bluetooth input audio signal or wired input audio signal, realizes the electroacoustic conversion.In addition, also comprise noise reduction module 7 in the Bluetooth function module 1, be used for the wireless audio signal that Bluetooth function module 1 receives is carried out echo inhibition and noise attentuation processing.

Fig. 5 is the circuit diagram of noise reduction module 7 among the utility model second embodiment.Shown in Fig. 5 circuit, noise reduction module comprises two MIC speech detection circuit and Dolby circuit.Wherein two MIC speech detection circuit are used for detecting respectively user's voice signal and environmental noise on every side, this MIC speech detection circuit itself just has the inhibition anti noise, and frequency is lower than the noise of people's speech signal and noise that frequency is higher than people's speech signal to be had and suppress effect preferably.For the noise identical with people's language frequency, then handle by special Dolby circuit, echo is suppressed and the effect of noise attentuation to reach.As for the selection of concrete Dolby circuit, then can freely select for use, and the miniature Dolby circuit of a lot of maturations is also arranged on the market, so do not do concrete restricted statement at this according to the demand of concrete earphone product.

Main MIC is used to detect people's voice signal among Fig. 5, and MIC_BIAS is the power supply input of MIC speech detection circuit; R3, C6 form low-pass filter circuit, are used for the ambient noise that rejection frequency is lower than people's speech frequency; L1, L2 are the high frequency magnetic bead, are used for the radio noise that filtering bluetooth or mobile phone produce; C8 is a filter capacitor, is used for the differential mode noise on the filtering MIC line; C9, C10, C11, C12, R6 form the high-pass filtering network, are used for the ambient noise that rejection frequency is higher than people's speech frequency.Ambient noise around auxilliary MIC is used to detect in this circuit, its hardware circuit Filtering Processing is identical with main MIC.

For the ambient noise identical with people's speech frequency, can't come filtering by MIC speech detection circuit filtering network, but can be detected simultaneously by main MIC and auxilliary MIC, pass through Dolby circuit, to assist after the detected environmental noise of MIC carries out software processes, the inversely add input signal of main MIC offsets detected environmental noise, to reach the effect of attenuate acoustic noise.Simultaneously, Dolby circuit also can carry out software processes to echo signal, plays the effect of eliminating echo.

Under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; and these improvement and distortion; all drop in the protection range of the present utility model; those skilled in the art should be understood that; above-mentioned specific descriptions are just better explained the purpose of this utility model, and protection range of the present utility model is limited by claim and equivalent thereof.

Claims (6)

1. I tech clip S, comprise Bluetooth function module (1), power module (2), electroacoustic modular converter (5) and MICRO-USB interface (6), wherein said power module (2) is connected in series between MICRO-USB interface (6) and the Bluetooth function module (1), be used for accepting charging and electric power being supplied with Bluetooth function module (1), it is characterized in that from MICRO-USB interface (6):
Also comprise bluetooth/wireline audio handover module (4), be electrically connected with Bluetooth function module (1), electroacoustic modular converter (5) and MICRO-USB interface (6) respectively, be used to realize the switching between wireline audio input signal and the Bluetooth audio frequency input signal; And
Wireline audio input and the shared MICRO-USB interface of charging input.
2. according to the described I tech clip S of claim 1, it is characterized in that:
Comprise Tip element (401) in described bluetooth/wireline audio handover module (4), be used to hang down the prompting of giving instructions by telegraph police and/or signal switching.
3. according to claim 1 or 2 described I tech clip Ss, it is characterized in that,
Comprise noise reduction module (7) in the described Bluetooth function module (1), be used for the wireless audio signal that described Bluetooth function module (1) receives is carried out echo inhibition and noise attentuation processing.
4. according to the described I tech clip S of claim 3, it is characterized in that,
Described noise reduction module comprises two MIC speech detection circuit and Dolby circuit.
5. according to the described I tech clip S of claim 1, it is characterized in that:
Described MICRO-USB interface (6) has five pins;
Wherein, first pin is connected the charging input with the 5th pin, and wherein first pin connects the charger power supply, and the 5th pin connects charger ground;
Second pin, the 3rd pin, the 5th pin connect the wireline audio input, and wherein second pin connects the input of L channel audio frequency, and the 3rd pin connects right audio channel input, the 5th pin ground connection;
The 4th pin is electrically connected Bluetooth function module (1).
6. according to the described I tech clip S of claim 1, it is characterized in that:
Described bluetooth/wireline audio handover module (4) comprises two audio switch respectively the bluetooth earphone left and right sound channels being controlled.
CN2009203503844U 2009-12-25 2009-12-25 Stereosonic bluetooth headset CN201590889U (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103167372A (en) * 2013-04-09 2013-06-19 北京兴科迪科技有限公司 Bluetooth headset with hands-free function and vehicle with same
CN103199903A (en) * 2013-02-19 2013-07-10 浙江恒科实业有限公司 Bluetooth audio receiver with interface shared by charging and audio
CN103888874A (en) * 2014-03-25 2014-06-25 建荣集成电路科技(珠海)有限公司 Audio input and output device and audio input and output method
CN103997704A (en) * 2014-05-28 2014-08-20 无锡中星微电子有限公司 Audio playing device and Bluetooth loudspeaker box
CN104393459A (en) * 2014-10-27 2015-03-04 常州听觉工坊智能科技有限公司 Interface circuit, interface switching method and electronic device
CN105049975A (en) * 2015-07-13 2015-11-11 青岛歌尔声学科技有限公司 Earphone and design method of earphone
CN105100993A (en) * 2015-07-23 2015-11-25 努比亚技术有限公司 Bluetooth earphone
CN105554611A (en) * 2014-12-29 2016-05-04 北京小鸟听听科技有限公司 Earphone and implementation method thereof
CN105763987A (en) * 2010-10-02 2016-07-13 张沈平 Earphone, corresponding sound source equipment and control method
CN105811515A (en) * 2016-04-29 2016-07-27 乐视控股(北京)有限公司 Method and system for charging universal serial bus Bluetooth headset through mobile terminal
CN105893301A (en) * 2015-04-17 2016-08-24 乐视致新电子科技(天津)有限公司 Control circuit of external functional module, external functional module and terminal device
CN106454567A (en) * 2015-08-10 2017-02-22 固昌通讯股份有限公司 Earphone microphone
CN107455009A (en) * 2017-07-03 2017-12-08 深圳市汇顶科技股份有限公司 Audio system and earphone
CN109729475A (en) * 2018-12-25 2019-05-07 努比亚技术有限公司 Charging bluetooth earphone method, circuit, terminal and computer readable storage medium
CN109862455A (en) * 2018-12-18 2019-06-07 努比亚技术有限公司 Operating mode control method, bluetooth headset, charging equipment and storage medium
CN109936792A (en) * 2019-03-19 2019-06-25 吉安市立讯射频科技股份有限公司 A kind of bluetooth headset that usage experience is good

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105763987B (en) * 2010-10-02 2019-08-02 广州市智专信息科技有限公司 A kind of earphone, corresponding audiogenic device and control method
CN105763987A (en) * 2010-10-02 2016-07-13 张沈平 Earphone, corresponding sound source equipment and control method
CN103199903B (en) * 2013-02-19 2016-07-06 浙江恒科实业有限公司 There is the Bluetooth audio receiver of charging, audio frequency shared interface
CN103199903A (en) * 2013-02-19 2013-07-10 浙江恒科实业有限公司 Bluetooth audio receiver with interface shared by charging and audio
CN103167372A (en) * 2013-04-09 2013-06-19 北京兴科迪科技有限公司 Bluetooth headset with hands-free function and vehicle with same
CN103888874A (en) * 2014-03-25 2014-06-25 建荣集成电路科技(珠海)有限公司 Audio input and output device and audio input and output method
CN103997704B (en) * 2014-05-28 2017-10-03 无锡中感微电子股份有限公司 Audio playing apparatus and Baffle Box of Bluetooth
CN103997704A (en) * 2014-05-28 2014-08-20 无锡中星微电子有限公司 Audio playing device and Bluetooth loudspeaker box
CN104393459A (en) * 2014-10-27 2015-03-04 常州听觉工坊智能科技有限公司 Interface circuit, interface switching method and electronic device
CN105554611A (en) * 2014-12-29 2016-05-04 北京小鸟听听科技有限公司 Earphone and implementation method thereof
CN105893301A (en) * 2015-04-17 2016-08-24 乐视致新电子科技(天津)有限公司 Control circuit of external functional module, external functional module and terminal device
CN105049975A (en) * 2015-07-13 2015-11-11 青岛歌尔声学科技有限公司 Earphone and design method of earphone
CN105100993A (en) * 2015-07-23 2015-11-25 努比亚技术有限公司 Bluetooth earphone
CN106454567A (en) * 2015-08-10 2017-02-22 固昌通讯股份有限公司 Earphone microphone
CN105811515A (en) * 2016-04-29 2016-07-27 乐视控股(北京)有限公司 Method and system for charging universal serial bus Bluetooth headset through mobile terminal
CN107455009A (en) * 2017-07-03 2017-12-08 深圳市汇顶科技股份有限公司 Audio system and earphone
WO2019006588A1 (en) * 2017-07-03 2019-01-10 深圳市汇顶科技股份有限公司 Audio system and headphone
CN109862455A (en) * 2018-12-18 2019-06-07 努比亚技术有限公司 Operating mode control method, bluetooth headset, charging equipment and storage medium
CN109729475A (en) * 2018-12-25 2019-05-07 努比亚技术有限公司 Charging bluetooth earphone method, circuit, terminal and computer readable storage medium
CN109936792A (en) * 2019-03-19 2019-06-25 吉安市立讯射频科技股份有限公司 A kind of bluetooth headset that usage experience is good

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C14 Grant of patent or utility model
GR01 Patent grant
LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Assignee: Weifang Goertek Electronics Co., Ltd.

Assignor: Goertek Inc.

Contract record no.: 2013370000052

Denomination of utility model: Stereo Bluetooth earphone

Granted publication date: 20100922

License type: Exclusive License

Record date: 20130322

Assignee: Weifang Goertek Electronics Co., Ltd.

Assignor: Goertek Inc.

Contract record no.: 2013370000052

Denomination of utility model: Stereo Bluetooth earphone

Granted publication date: 20100922

License type: Exclusive License

Record date: 20130322

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20100922