KR20010012025A - Hands-Free system for enabling wireless communication with cellular phone with low power consumption - Google Patents

Abstract

PURPOSE: A hands-free system capable of wireless communication with a cellular phone with low power is provided to make electromagnetic wave located remote from brains, thereby eliminating damages by the cellular phone. CONSTITUTION: An adapter(100a) is connected to an earphone jack of a cellular phone(100) or a communication port, and communicates data transceived through the cellular phone(100) with an external equipment with a low output of a wireless signal, so as to reduce the damages from powerful electromagnetic wave. A wireless headset(200) directly attached to an ear of a user communicates with the adapter(100a) with a low wireless signal. And the wireless headset(200) converts a received wireless signal into a voice signal for the hearing of the user, and converts a speaking tone of the user into an electric signal, to deliver the converted signal to the adapter(100a).

Description

Hands-free system for enabling wireless communication with cellular phone with low power consumption}

The present invention relates to a hands-free system for a mobile phone, and in particular, consisting of a portable transmission and reception headset capable of wirelessly communicating with a mobile phone at low power and an adapter for a mobile phone. And, the receiving unit can be plugged into the ear, and the other end is connected to the microphone in a flip-type hands-free system capable of wireless communication with the mobile phone at low power, which can conveniently talk without using a hand.

In general, while the electronic industry is developing, many electronic devices are experiencing a lot of benefits, but the unnecessary electromagnetic waves emitted by each electronic device cause malfunctions in the electronic devices and the precision control system, and even have a negative effect on the human body. Gave birth to. Among the products that emit electromagnetic waves, the most harmful products are mobile phones, mobile communication devices.

Strong electromagnetic waves in the high frequency band used in mobile phones are known to be harmful to the human body, especially the brain. If you attach a cell phone that uses these harmful radios close to your ear, the risk will increase. In addition, the existing mobile phone has the advantage that the user can always carry and talk, but there is a disadvantage that you can not use both hands freely during the call because you need to hold the phone with your hand.

Although there are products that allow two hands to be freed using wired earphones and a microphone, there are limitations due to the limitations of the wire. In addition, since a certain voice signal is transmitted / received regardless of surrounding conditions, a satisfactory call cannot be made in a noisy area.

In order to overcome these shortcomings of the current mobile phone, the present invention invented a system of a small transceiver capable of wireless transmission and reception with a mobile phone.

The risks of electromagnetic waves used in mobile phones have been raised many times and awareness of the risks is increasing. The possibility of high-frequency and high-power radio waves used in mobile phones is due to the electromagnetic waves generated by mobile phones made by Japan's NEC. The case was brought to social attention.

According to the Korea Institute of Standards and Science and the Korea Institute of Science and Technology, the electromagnetic interference measurement business report (Ministry of Science and Technology) published in 1997, electromagnetic radiation occurs most frequently at antennas, junctions of antennas and mobile phones when using mobile phones. "It can have a big impact on the brain, ear and eye areas that we come in contact with," he said. Modeling a phone in the right ear, which radiates electromagnetic waves at a power of 900W at 900MHz, the cell phone has a SAR value of 1.6W / kg or partially exceeded.

The SAR is a specific absorption rate indicating the rate at which the human body absorbs electromagnetic waves. In the C95.1-1992 RF safety guide defined by the American National Standards Institute (ANSI) and the Institute of Electrical and Electronics Engineers (IEEE), the SAR value is obtained from near field electromagnetic equipment. It should be less than 0.08W / kg and take the unit area to be used for experiments in the shape of cube and regulate the SAR value not to exceed 1.6W / kg.

This suggests that the mobile phone has already been exposed to danger. In addition, reports from Telsta Corporation, Ltd. and Radiation Research have reported that in Australia, the incidence of lymph cancer in rats exposed to an 18-hour period of 1 hour per day in 1997 doubled. In addition, the World Health Organization (WHO) is planning a study to investigate the relationship between cell phones and brain tumors.

In this way, the risk of radio waves is very high, and the risk of radio waves continues to increase when considering the explosive increase in the market size and frequency of use. There is a disadvantage that the main part of the human body is exposed as it is.

In addition, the mobile phone has the advantage that the user can always carry and talk, but there is a disadvantage that you can not use both hands freely during the call because you have to hold the phone with your hand.

Although there are products that use both handsets and microphones to free two hands, there is still room for inconvenience due to the limitations of wires.

Figure 1 is a mobile phone transceiver according to the prior art BK Global (CEO Lee Jae Kang) introduced in the electronic newspaper of March 24, 1999 for mobile phone transceivers, there is a disadvantage due to the limitation of the wire.

2 is a wireless headset has been developed by the Japanese electronic venture company Temco Japan for military communications, but there is a decisive disadvantage of not considering the effect on the human body (Electronic Newspaper April 9, 1999).

Therefore, the existing system to escape from the harmful effects of the electromagnetic wave of the mobile phone is a wired earphone attached to the mobile phone is a wired system is not so far away from the mobile phone is difficult to wear at all times and has a lot of restrictions on behavior when using. In addition, the wireless earphone has the advantage of being wireless, but there is a decisive disadvantage that does not consider the effect of electromagnetic waves on the human body.

In order to solve the above problems of the prior art of the present invention, an object of the present invention is to use a low-power wireless system between the mobile phone and the headset by using a low-power mobile phone to be used at a distance of harmless to the human body It is to provide a hands-free system capable of wireless communication with.

In addition, an additional object of the present invention is to avoid harmful damage to the human body caused by the use of the mobile phone by keeping away from the brain a strong power electromagnetic waves generated from the mobile phone in order to avoid harming the human body, especially the user's health of the mobile phone that emits a lot of harmful electromagnetic waves By developing a headset for a mobile phone that can be used and plugged directly into the ear, it provides a hands-free system that enables wireless communication with the mobile phone at low power, enabling communication without the need for hand support.

1 is a transceiver for a mobile phone according to the prior art.

2 is an exemplary state of use of a wireless headset according to the prior art.

Fig. 3 is a graph of the relationship between the electric field strength and the frequency of weak radio waves as a radio wave reference of the information communication unit, which does not require radio station permission.

4 is a schematic illustration of a signaling system between a mobile subscriber and the Internet or a public telecommunication network.

5 is an exemplary diagram for explaining a concept of communicating with a mobile phone using an adapter and a headset according to the present invention.

Figure 6 is a block diagram of a general mobile phone applied to the present invention.

Figure 7 (a) is a side view of a headset according to the present invention.

Figure 7 (b) is a rear view of the battery case removed from the headset.

FIG. 7 (c) is a conceptual diagram in which a function of turning on / off a mobile phone by adding a keypad and a switch to the headset and dialing in a wireless headset without directly operating the mobile phone is added.

8 is an internal configuration of an adapter and a wireless headset that is mounted on the mobile phone and the acoustic transceiver mounted on the mobile phone according to the present invention.

9 is an exemplary diagram of a structure for actively changing the size of a received voice according to external noise

10 is an exemplary diagram of a structure for canceling noise by using an inverse phase of external noise.

11 is an illustration of a structure for removing noise using the technique of FIG. 11 with a headset modulator.

Explanation of symbols on the main parts of the drawings

3: modulation section 4: transmission data synthesis section

17: voice synthesizer 18: speaker

100: cell phone

100a: Adapter (acoustic receiver of earphone jack type)

100b: package jack type audio transceiver

110: modulator for adapter 120: first mixer

130: PLL for adapter 140: amplifying unit for the first transmission

150: first isolator 160: first receiving amplifier

170: second mixer 180: demodulator for the adapter

201: earphone for headset 202: main body of headset

203: Cover for headset 204: Microphone for headset (MIC)

205: Incoming indicator for headset 200: Headset

210: modulator for headset 220: fourth mixer

230: PLL for headset 240: amplification part for second transmission

250: second isolator 260: second receiving amplifier

270: third mixer 280: demodulator for headset

The present invention for achieving the above object, in the hands-dried system for a mobile phone, is connected to the earphone jack or communication port of the mobile phone 100, the general mobile phone to reduce the damage to the human body by powerful electromagnetic waves by using high-power high-frequency An adapter (100a) for communicating the data transmitted and received through the mobile phone 100 with a specific external device as a wireless signal of low output; And a device that can be attached directly to a user's ear and communicates with the adapter 100a through a low power wireless signal, converting the received wireless signal into a voice signal for the user to listen to and sounding the user's voice. It provides a hands-free system capable of wireless communication with the mobile phone at low power, characterized in that it comprises a wireless headset 200 for converting the electrical signal to the adapter 100a side.

The wireless headset 200 has a role of supporting the wireless headset to the human body, earphones (201) for converting an electrical signal into a voice signal; An incoming indicator 205 consisting of an LED and a small display window and warning of a call mode request upon incoming call ring; A microphone 204 which serves to convert a human voice signal into an electrical signal; Receives a radio signal transmitted from the adapter 100a and converts it into a voice signal so that the user can listen to the earphone 201 and converts the user's voice sound into an electric signal through the microphone 204. The main body 202 to be sent to the adapter (100a) side; And a cover 203 formed at one end of the microphone 204, the other end of which is connected to the main body 202 of the wireless headset, and adopts a flip structure for easy wearing and at the same time being used as a switch for initiating communication. do.

First, the technical idea to be applied in the present invention will be described.

In the present invention, in order to escape from the strong electromagnetic waves of the existing mobile phone described above, it is possible to low-power communication between the mobile phone and the headset while the mobile phone is located away from the head, and for this purpose of the use distance in the conventional wired earphone To eliminate restrictions and inconveniences, wireless communication between the mobile phone and the headset is enabled.

In addition, it has a channel selection function to prevent confusion with other users in the near field during wireless communication, and provides a higher call quality by adding a function of actively detecting and transmitting volume by detecting noise when the external noise is large. do.

In particular, since the present invention needs to be small in order to be easy to carry, all devices in the low frequency band such as the modulator, the demodulator, the noise canceller, the frequency synthesizer, and the power amplifier are integrated in one chip.

In addition, the present invention is a device that communicates with a mobile phone in a close position can be implemented as a separate element by taking a simple method compared to the complex modulation and demodulation method of a general mobile phone, and uses a weak radio wave output, so as to consume a small battery Can also be driven.

Problems in the practice of the present invention relates to the frequency of use and the limitation of transmission power of the headset.

Fig. 3 is a graph showing the relationship between the electric field strength and the frequency of the weak radio waves as a radio wave reference of the information communication unit, which does not require radio station permission.

Referring to Figure 3, it can be seen that the radio station permission is not necessary if the electric field strength at a distance of 3 meters from the transmission equipment at a frequency of almost full band is 500 microvolts / meter or less.

The following table 1 is from Ministry of Information and Communication Notice No. 1997-53. When transmitting audio signal through frequency-modulated or phase-modulated analog (or digital) single channel (or two or more channels), the output conditions given in the table must be satisfied. It can be seen that it can be used without permission.

Frequency (MHz) Channel spacing Number of channels Propagation format Aerial power Occupied Bandwidth 74.560 to 74.740 60㎑ 4 F (G) 3EF (G) 8WF (G) 9W 3 mW or less 60㎑ or less 106.200 to 107.800 200㎑ 9 1 mW or less 60㎑ or less 219.625 to 220.105 60㎑ 9 3 mW or less 250㎑ or less 740.125-751.875 250 ㎑ 48 10 mW or less 250㎑ or less 928.125-929.875 250 ㎑ 8 10 mW or less 250㎑ or less

In addition, Table 2 is an output regulation for the cordless telephone prescribed by the Ministry of Information and Communication. The present invention communicates at low power so as not to be harmful to the human body, and because the use distance is not as large as a telephone without a home code, the above provisions can be sufficiently satisfied.

division Type 1 Type 2 Frequency band (MHz) 46.510-46.970 / 49.695-49.970 914-915/959-960 Number of channels 15 40 Send output 3 mW 10 mW Communication Frequency common method Frequency common method

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

4 is a schematic illustration of a signal transmission scheme between a mobile subscriber and the Internet or a public telecommunication network.

When a subscriber is carrying a mobile communication terminal in a mobile communication service network, when a dial-up request is generated from a trunk line subscriber or a mobile communication subscriber, the mobile communication service provider provides a corresponding service through each base station forming a mobile communication service network. Call the subscriber to try to connect.

Then, if the call connection is successfully established, the called mobile subscriber is to make a call through the telephone connection with the caller.

On the other hand, when any one of the Internet subscribers leaves a message in the e-mail of a mobile subscriber in the mobile communication service network by the internet access function, the mobile service provider notifies the subscriber of such information. The subscriber can download and confirm the e-mail on the Internet through the mobile communication service provider.

In addition, the media provided by a specific site on the Internet or PC communication may be downloaded through the mobile communication service provider, and the media or text service provided on the Internet or PC communication may be downloaded using a mobile communication terminal. A signal transmission path is formed to store this and play it back as a voice if necessary.

At this time, when a mobile phone receives a strong radio wave from a cell phone base station far away from a typical cell phone, the user calls the cell phone directly to his ear and receives a high frequency radio wave transmitted from the base station near the brain, which is harmful to the human body. In the present invention, as shown in the accompanying FIG. 5, the wireless communication headset is carried while the user maintains a considerable distance from the brain, and the adapter is used by being connected to an earphone jack or an external port of a mobile phone.

At this time, the communication between the mobile phone 100 and the wireless headset 200 is wireless and is located at a relatively close distance so that a call can be made with weak power.

6 is an exemplary block diagram of a general mobile phone applied to the present invention. The mobile phone 100 shown in FIG. 6 receives a wireless signal received through the receiver 6 and the amplification unit 7. A voice / character separator 8 for separating information, a text storage unit 9 for receiving and storing character information separated by the voice / character separator 8, and the character storage unit according to a user's request Character information is stored in the LCD driver 10 for receiving the character information stored in the (9) or the character information input through another path and displayed on the LCD (11), and the voice / character separation unit (8) A demodulator 13 for receiving a received signal and demodulating and outputting the audio signal; and storing a media in which text information is separated from the voice / character separator 8 when a signal of a specific format is media (music). Section 14 and the media storage section ( A decoder 16 for converting the media data stored in the audio signal 14 into an audio signal, and outputting the audio signal; A voice synthesizer 17 that receives input and selectively outputs to the speaker / earphone 18 and an external sound generator (for example, CD-P, DVD-P, PC, ...) can be connected to the outside. The interface unit 15 for storing the media signal generated by the sound generator in the media storage unit 14, and the microprocessor 20 for controlling the respective components to operate properly according to the user's request or selection mode It consists of).

In addition, a voice / text generator 5 for generating voice and text signals when the mobile phone transmits to the outside, and the voice and text signals provided from the voice / text generator 5 and the decoder 16 are inputted. A transmission data synthesizing unit 4 which receives the sound signal and provides synthesized transmission data, a modulator 3 and an amplifying unit 2 for receiving and modulating the synthesized transmission data from the synthesis unit 4; ) And the transmitter 1.

At this time, the voice / character separator 8 has a switching function in which its function changes the signal transmission path by the control signal of the microprocessor 20.

Attached to the mobile phone 100 shown in FIG. 6, any one of the adapter 100a or the package jack type audio transceiver 100b, which is the earphone jack type acoustic transceiver of FIG. 5, is attached to the wireless headset 200. It is further provided.

At this time, since the earphone jack type sound transceiving unit, that is, the adapter 100a may be used by plugging the adapter into the earphone jack, it is simply connected to the earphone jack of the mobile phone 100, but only the most basic communication function can be used. It can be said that the utilization is high because it is applicable. In addition, in the situation where the mobile phone 100 is mounted on the charger, it is not easy to use the communication port of the mobile phone.

In addition, the package jack type audio transmission and reception unit, that is, the adapter 100b may be used by plugging into a communication port of the lower part of the mobile phone, and when the adapter 100b is not in use, a switch is added to turn off the communication port. If you use it, you can add more add-ons.

The wireless headset 200 has an appearance as shown in Figure 7 attached, the earphone 201 of the headset can be attached to the ear as if attached to the ear for listening to the existing music and can talk freely without using a hand. It is surrounded by a material such as rubber so that it can be worn comfortably on a person's ear. The shape of the earphone is not limited to the structure shown in the drawings, but it will be possible as long as it has a good fit and can be attached to the ear well.

In addition, the incoming call indicator 205 is located at the rear of the wireless headset 200 so that the indicator can be seen when the wireless headset 200 is inserted into a pocket or the like using a flip, and as a power source, AAA type is cheap and cheap. The body was rounded and sized appropriately to use a small battery. In addition, the flip cover 203 serves as a switch to open and operate the cover when using the wireless headset 200, the microphone 204 is attached to the end.

Referring to FIG. 8 to which an internal configuration of a headset having an appearance as shown in FIGS. 7A to 7C and an internal configuration of an adapter which is an acoustic transceiver 100a mounted on the mobile phone 100 are attached. Will be explained.

8 is a configuration of the interior of the wireless headset 200 and the adapter 100a and the wireless headset 200 of the earphone jack type mounted on the mobile phone according to the present invention implemented as a single chip as described above Reduced volume and weight so as not to inconvenience users.

8 is an internal configuration of the adapter 100a and the wireless headset 200, which are acoustic transmission / reception units mounted on a mobile phone, according to the present invention.

The adapter 100a includes an adapter modulator 110, a first mixer 120, an adapter PLL 130, a first transmitting amplifier 140, a first isolator 150, and a first receiving amplifier. The unit 160, the second mixer 170, and the demodulator 180 for the adapter.

The headset 200 includes a headset modulator 210, a fourth mixer 220, a headset PLL 230, a second transmit amplifier 240, a second isolator 250, and a second receive amplifier. The unit 260 includes a third mixer 270 and a demodulator 280 for a headset.

Referring to FIG. 8, a signal received through an antenna included in the cellular phone 100 in a call mode may include the receiver 6, the amplifier 7, and the voice / text separator of FIG. 6. 8) and converted into a voice signal through the demodulator 13 and transmitted to the speaker / earphone 18 side of the main body of the mobile phone 100 through the voice synthesizer 17, the adapter according to the present invention ( Since the 100a) is connected to the main body of the mobile phone 100, the speaker / earphone 18 side does not operate and the voice electric signal output through the voice synthesis unit 17 is transmitted through the modulator 110 for the adapter. After the FM modulation, the first mixer 120 is loaded on the reference frequency or carrier frequency generated by the PLL 130 for the adapter, and then transferred to the first transmission amplifier 140.

The first transmission amplifier 140 amplifies the input signal into a low power state by low voltage amplification, and then wirelessly transmits the signal through the antenna via the first isolator 150.

The FM modulated radio signal transmitted by the transmission operation of the adapter 100a is detected through an antenna provided in the wireless headset 200 and the transmission path is separated through the second isolator 250 so that the second number The credit amplification unit 260 is transmitted.

The second receiving amplifier 260 amplifies the received signal and provides it to the third mixer 270 serving as a frequency separating unit. The third mixer 270 as the frequency separating unit is a PLL for the headset. The signal is removed from the second receiving amplifier 260 based on the reference frequency or the carrier frequency band signal provided at 230 and then transmitted to the demodulator 280 for the headset.

The demodulator 280 for the headset converts the received signal into an FM demodulated signal and provides it to the headset earphone 201.

Therefore, the user can listen to the voice of the other party during the call, and then the voice data spoken by the user is converted into a voice electric signal through the microphone 204 for the headset and the modulator 210 for the headset is operated. After the FM modulation is carried through the fourth mixer 220 to the reference frequency or carrier frequency generated by the PLL 230 for the headset is transferred to the second transmission amplifier 240.

The second transmission amplifier 240 amplifies the input signal into a low power state by low voltage amplification, and then wirelessly transmits the signal through the antenna via the second isolator 250.

The FM modulated radio signal transmitted by the transmission operation of the wireless headset 200 is detected through an antenna provided in the adapter 100a, and the transmission path is separated through the first isolator 150, thereby allowing the first reception. It is delivered to the amplifier 160.

The first receiving amplifier 160 amplifies the input signal and provides it to the second mixer 170 serving as a frequency separating unit. The second mixer 170 serving as the frequency separating unit is used for the adapter. After removing the corresponding signal from the first receiving amplifier 160 based on the reference frequency or the carrier frequency band signal provided from the PLL 130, the signal is transmitted to the demodulator 180 for the adapter.

The demodulator 180 for the adapter converts the received signal into an FM demodulated signal and provides it to the modulator 4 inside the mobile phone 100.

Therefore, the voice spoken by the user of the wireless headset 200 is transmitted as a high power wireless signal so that a call counterpart can listen through the amplifying unit 2 and the transmitter 1 inside the mobile phone 100.

In this case, the present invention may use any method such as phase modulation and amplitude modulation as well as FM modulation. In FIG. 8, the channel selection signal applied to each PLL 130 or 230 may be arbitrarily selected by the user. In order to change the communication channel between the headset 200, a multi-channel environment, for example, subway or stadium, when several people at the same time to communicate at a short distance at the same time to enable a clear channel to enable the call It is for.

In addition, the wireless headset 200 according to the present invention may be used not only in a quiet place such as an indoor place but also in an environment having a lot of outdoor noise, so that the block reduces the effect of external noise for more convenient use. This is necessary.

In this case, the method of reducing external effects is to first reduce the effect of external noise by increasing the output signal through the speaker, and the second is to generate noise that produces a phase signal opposite to the external noise, thereby reducing the effect of external noise. There is a way to offset this.

FIG. 9 and FIG. 10 are structures in which a voice signal processor used in a headset is used to reduce an effect of external noise, and a structure in which a volume of an output signal is adjusted by canceling an effect of external noise by controlling a voice gain.

FIG. 9 is a structure in which an external gain is sensed by an automatic gain controller and the amplification rate of the voice is adjusted accordingly. FIG. 10 is a noise canceller using a signal having a phase opposite to the external noise by a noise canceller. It is a structure to get rid of.

9 and 10 by applying a single external noise measurement microphone at the same time and add both blocks of the automatic gain controller and the noise canceller in the inside will be able to cope with the external noise more effectively.

That is, the effect of external noise is canceled by the noise canceller as shown in FIG. 10, and if the sound of the wireless headset 200 is adjusted as shown in FIG. 9, a high quality call can be always made regardless of an external environment. .

FIG. 11 applies a structure for canceling the effect of external noise as shown in FIG. 10 to the transmitter 1. In other words, when a circuit for canceling noise is not inserted, both a user's voice signal and external noise are detected by a microphone, and when the external noise is severe, a person's sound may be buried in the noise and may be difficult to hear. Therefore, in this case, as shown in FIG. 11, if the external noise measurement microphone measures external noise and adds signals of opposite phases, the effect of noise may be canceled and only the user's voice may be transmitted.

While the invention has been shown and described in connection with specific embodiments thereof, it will be appreciated that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

As described above, the hands-free system capable of wireless communication with the mobile phone at low power according to the present invention can avoid harm to the human body due to the use of the mobile phone by keeping electromagnetic waves of strong power harmful to the human body generated from the mobile phone away from the brain. By developing a wireless headset for mobile phones that can be plugged directly into your ear, you can talk without having to hold it by hand.

In addition, by adding an external measurement microphone, the external noise acquired by the noise controller is added to the inverted value and the voice signal transmitted from the mobile phone, and the external noise is transmitted in the opposite phase. By passing, the call quality can be improved.

In addition, since wireless communication with such a mobile phone can be used more conveniently in short-range communication, it is possible to increase convenience by using a headset that detects ambient noise and produces a corresponding sound. If you support a wider range of communication with the present invention, you can attach the display panel to add the text display function used in the mobile phone, add a keypad to make calls with the wireless headset, and the distance between the mobile phone and the wireless headset. It can detect and alert you when it is out of range, prevent loss through it, and dial in a wireless headset.

Claims (6)

In the hands-driing system for mobile phones, Connected to the earphone jack or communication port of the mobile phone 100, the general mobile phone using a high output high frequency to reduce the damage to the human body caused by strong electromagnetic waves, the data transmitted and received through the mobile phone 100 as a low power wireless signal of the external An adapter 100a in communication with a particular device; And It is a device that can be attached directly to the user's ear and communicates with the adapter 100a through a low power wireless signal, which converts the received wireless signal into a voice signal so that the user can listen to the user's vocal sound. Hands-free system capable of wireless communication with the mobile phone at low power, characterized in that it comprises a wireless headset (200) for converting the electrical signal to the adapter (100a) side. The method of claim 1, The wireless headset 200 Earphone 201 also serves to support the wireless headset to the human body, and serves to convert an electrical signal into a voice signal; An incoming indicator 205 consisting of an LED and a small display window and warning of a call mode request upon incoming call ring; A microphone 204 which serves to convert a human voice signal into an electrical signal; Receives a radio signal transmitted from the adapter 100a and converts it into a voice signal so that the user can listen to the earphone 201 and converts the user's voice sound into an electric signal through the microphone 204. The main body 202 to be sent to the adapter (100a) side; And The microphone 204 is formed at one end and the other end is connected to the main body 202 of the wireless headset and adopts a flip structure to further include a cover 203 which is easy to wear and used as a switch for initiating communication at the same time. Hands-free system capable of wireless communication with a mobile phone, characterized in that low power. The method of claim 1, The adapter 100a is An adapter modulator 110 for receiving an output of the voice conversion means of the received signal inside the mobile phone and modulating the output signal; A first mixer 120 for mixing and outputting data modulated by the adapter modulator 110 to a reference frequency or a carrier frequency generated by the adapter PLL 130; A first transmission amplifier 140 for amplifying a signal output from the first mixer 120 in a low power state by low voltage amplification and then outputting the amplified signal; A first receiving amplifier 160 for amplifying and outputting an input signal; The signal output from the first transmitting amplifier 140 is transmitted through an antenna, and the wireless signal transmitted by the transmitting operation of the wireless headset 200 is detected through the antenna and the first receiving amplifier 160 is detected. The first isolator 150 to deliver; A second mixer 170 serving as a frequency separator for removing a corresponding signal from the first receiving amplifier 160 based on a reference frequency or a carrier frequency band signal provided by the adapter PLL 130; And The demodulator 180 demodulates the signal received through the frequency separation unit, converts the signal into a voice signal, and then transfers the demodulation unit 180 for an adapter to the wireless signal conversion unit for the voice signal for wireless communication. Hands-free system for wireless communication with mobile phones. The method according to claim 1 or 2, The wireless headset 200 A headset modulator (210) for receiving, modulating, and outputting an electric signal corresponding to a voice signal of a user acquired through the microphone (204) for a headset; A fourth mixer 220 for mixing and outputting data modulated by the headset modulator 210 to a reference frequency or a carrier frequency generated by the headset PLL 230; A second transmission amplifier 240 for amplifying a signal output from the fourth mixer 220 in a low power state by low voltage amplification and outputting the amplified signal; A second receiving amplifier 260 for amplifying and outputting an input signal; The signal output from the second transmission amplifier 240 is transmitted through an antenna, and the wireless signal transmitted by the transmission operation of the adapter 100a is detected through the antenna and the second reception amplifier 260 is detected. A second isolator 250 for transferring to the second isolator 250; A third mixer 270 serving as a frequency separator for removing a corresponding signal from the second receiving amplifier 260 based on a reference frequency or a carrier frequency band signal provided from the headset PLL 230; And Hands-free system capable of wireless communication with a mobile phone with low power, characterized in that the demodulation unit for demodulating the signal received through the frequency separation unit converted to a voice signal and then delivered to the earphone side. The method of claim 3, wherein Hands free system capable of wireless communication with a mobile phone at low power, characterized in that the reference frequency or carrier frequency band signal generated in the adapter PLL (130) inside the adapter (100a) can be varied. The method of claim 4, wherein Hands-free system capable of wireless communication with a mobile phone at low power, characterized in that the reference frequency or carrier frequency band signal generated in the headset PLL (230) inside the headset (200) is variable.