KR100745009B1 - Wireless hands-free set by using of ultrasonic waves - Google Patents

Abstract

A wireless hands-free set using ultrasonic waves is provided to perform wireless communication through the ultrasonic waves for communication between the hands-free set and an ear set, thus there is no risk of crosstalk with another user and a user can immediately use the hands-free set without separate setting since a fixed frequency is used. A hands-free body(100) is equipped with a plug(101) connected to an earphone terminal or a connector of a mobile phone terminal. An ear set(200) conducts a transceiving process with the hands-free body(100) through ultrasonic waves. A power supplier(120) supplies power to the hands-free body(100). An ultrasonic transmitter(150) transmits a signal delivered through the plug(101) from the mobile phone terminal to the ear set(200). An ultrasonic receiver(250) is disposed in the ear set(200) to receive the signal of the transmitter(150). An ultrasonic transmitter(251) receives an external input signal to transmit the received signal to the hands-free body(100). An ultrasonic receiver(151) receives a signal sent from the ear set(200) to send the received signal to the mobile phone terminal.

Description

Wireless hands-free set using ultrasonic waves {Wireless hands―free set by using of ultrasonic waves}

1 is a block diagram illustrating a bidirectional wireless handsfree set using ultrasonic waves according to an embodiment of the present invention.

2 is a block diagram illustrating a unidirectional wireless handsfree set using ultrasonic waves according to an embodiment of the present invention.

Figure 3 is a perspective view of the use state showing an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: hands-free body 101: plug

102: voice amplifier 103: ultrasonic oscillator

104: modulator 105: ultrasonic transmitter

106: voice amplifier 107: demodulator

108: ultrasonic receiver 109: DC power supply

110: ultrasonic transmitting sensor 111: ultrasonic receiving sensor

131: voice amplifier 132: the main body microphone

120: power supply unit 150: ultrasonic transmission unit

151: ultrasonic receiver 200: ear set

201 Ultrasonic Transmitter 202: Ultrasonic Transmitter

203: ultrasonic receiver 204; Demodulator

205: voice amplifier 206: speaker

207: ultrasonic transmitter 208: modulator

209: ultrasonic oscillator 210: voice amplifier

211: ear set microphone 220: boom microphone

230: optional microphone 250: ultrasonic receiver

251: ultrasonic transmission unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless hands-free set, and in particular, by applying ultrasonic technology to a wireless hands-free device of a vehicle so that a telephone can be freely transmitted and received wirelessly at a predetermined distance between a hands-free body and an ear set worn on the hands of a hands-free user. It relates to a wireless hands-free set using ultrasonic waves.

In general, as the use of mobile terminals increases, the number of users who send and receive telephones while driving is increasing.

As a result, the use of a mobile phone terminal while driving allows the driver to concentrate on driving by distracting attention and concentration, maintaining speed and distance from the front vehicle, checking for the presence of the rear vehicle, handling accidents and steering wheels properly. Because of this, safety accidents frequently occur.

Therefore, in order to reduce the risk of accidents caused by the use of a mobile phone terminal recently, measures such as the use of the mobile phone terminal while driving are being legally regulated, and the violation is regulated by traffic regulations.

Accordingly, devices with a hands-free function that can safely receive a mobile phone terminal while driving are being developed.

In general, a hands-free device includes a microphone that reproduces a call signal from a mobile phone terminal or transmits a call signal of a user of the mobile phone terminal to a counterpart in a main body that can be mounted on the mobile phone terminal so that a call can be made without holding the mobile phone terminal while driving. And a speaker.

As an example of implementing the hands-free function, hands-free earphones capable of transmitting / receiving by an earphone jack are connected to a mobile phone terminal to receive a call, thereby minimizing unnecessary operations for the driver to make a phone call.

Accordingly, various types of wired and wireless hands-free devices are provided on the market.

Among the existing hands-free, hands-free with microphone and speaker integrated, the microphone and speaker are inside the hands-free main body, or the microphone only is about 30cm away from the hands-free main body by the boom. When output to the speaker of the main body, it is not possible to talk in both directions due to howling or echo shape that the other party's voice returns to the microphone mounted on the hands-free, and only one way call is available. As a method of immediately blocking the voice transmission of the microphone, while the other party is speaking, hands-free users have a very uncomfortable problem in that they do not speak but only listen.

Therefore, in order to solve the problem of the handsfree of the microphone and the speaker integrated, wired earphone handsfree with a microphone is connected to the mobile phone, and then the earphone is plugged into the ear. There is no problem, but if the earphone cable connected to the mobile phone terminal is caught by the driver's hand or the handle, the mobile phone terminal falls off the cradle or the earphone is easily detached from the mobile phone terminal. have.

Accordingly, in order to overcome the problems of the wired earphone hands free, a wireless hands free using FM radio frequency has been provided.

The wireless hands-free can be easily confused with other hands-free users using the same FM radio frequency because the wireless hands-free transmission and reception between the hands-free body mounted on the vehicle and the earphones worn on the user's ear using the FM radio frequency. If there is a large output device using the same FM radio frequency around, the relatively small FM wireless hands-free has a problem that the communication between the hands-free main body and the earphone is not interfered with the operation.

Therefore, to provide a wireless hands-free device using infrared rays to overcome the problems of the wireless hands-free using the FM radio frequency, hands-free wireless transmission and reception using infrared rays between the hands-free body mounted on the vehicle and the earphones worn on the user's ear. to be.

However, since the wireless hands-free has strong infrared rays from the sun in the vehicle on a strong day in the vehicle, there is a problem of causing obstacles in the wireless transmission / reception hands-free using relatively weak infrared rays.

Therefore, there are many technical problems in configuring the wireless hands-free by infrared transmission and reception while blocking strong sunlight.

Therefore, in order to solve the problem of the wireless hands-free device using the infrared, the Bluetooth wireless hands-free is recently used.

The Bluetooth wireless handsfree is a digital wireless handsfree configured using a Bluetooth chip.The Bluetooth wireless handsfree is a digital wireless handsfree that is equipped with a handsfree body mounted on a vehicle and a Bluetooth chip embedded in an ear set worn on a user's ear. To receive.

However, the Bluetooth wireless hands-free is that when the user turns off the Bluetooth wireless hands-free or the distance between the hands-free body and the ear set is far, the operation of the Bluetooth is stopped and then turned on again. There is a hassle to reset.

In addition, since the Bluetooth chip is expensive, the manufacturing cost of the Bluetooth wireless hands-free is increased.

Accordingly, an object of the present invention for solving the above problems is to communicate wirelessly between the handsfree and the ear set using ultrasonic waves, unlike wired earphone handsfree, FM wireless handsfree, infrared wireless handsfree, and Bluetooth wireless handsfree. Or to provide a wireless hands-free set using ultrasonic waves that can make a call to avoid the interference of the frequency regardless of the environment.

The present invention for achieving the above object is a wireless hands-free set;

A hands-free main body including a plug connected to a connector of the terminal or an earphone terminal; An ear set for transmitting and receiving through the hands-free main body and an ultrasonic wave; A power supply unit supplying power to the hands-free main body; An ultrasonic transmitter for transmitting a signal transmitted from the terminal through the plug to an ear set; An ultrasonic transmitter for receiving an external input signal of an ultrasonic receiver provided in an ear set to receive a signal from the ultrasonic transmitter and transmitting the external input signal to a hands-free main body; And an ultrasonic receiver for receiving a signal transmitted from the ear set and transmitting the signal to a mobile phone terminal.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a bidirectional wireless handsfree device using ultrasonic waves according to an embodiment of the present invention.

The wireless hands-free set using the ultrasonic wave of the present invention includes a hands-free main body 100 and an ear set 200.

The hands-free main body 100 is mounted on a dashboard or a cigar jack by a hands-free support or double-sided tape, and therein, a power supply 120 for supplying power by a cigar plug for supplying DC 12V power from a cigar jack of a vehicle. And a plug 101 connected to the connector of the mobile phone terminal or the earphone terminal.

In addition, the hands-free main body 100 is provided with an ultrasonic transmitter 150 for transmitting a signal transmitted through the plug 101 connected to a connector or earphone terminal of a mobile phone terminal to the ear set 200.

The ultrasonic transmitter 150 is amplified by the voice amplifier 102 for receiving a voice signal input through the plug 101, the ultrasonic wave generator 103 for generating ultrasonic waves, and the voice amplifier 102 Modulator 104 for changing the ultrasonic wave formed by the ultrasonic oscillator 103 to transmit the voice signal in accordance with the strength and weakness of the voice signal, and an ultrasonic transmitter 105 for transmitting the modulated ultrasonic wave carrying the voice signal Is done.

In addition, the ultrasonic wave receiving unit 151 receives the signal transmitted from the ear set 200 and transmits the signal to the mobile terminal.

The ultrasonic receiver 151 may obtain an audio signal by removing an ultrasonic component from an ultrasonic receiver 108 provided to receive a signal transmitted by the ultrasonic transmitter 207 and an ultrasonic wave received by the ultrasonic receiver 108. A demodulator 107, a voice amplifier 106 for amplifying the voice signal obtained by the demodulator 107, and a plug 101 for outputting the signal of the voice amplifier 106.

On the other hand, the ear set 200 to be transmitted and received with the hands-free main body 100 is provided with ultrasonic transmitter and receiver 250, 251 therein, the ultrasonic receiver 250 is a signal transmitted from the hands-free main body 100 Ultrasonic receiver 203 provided to receive the, a demodulator 204 for removing the ultrasonic components from the ultrasonic wave received by the ultrasonic receiver 203 to obtain a voice signal, and the voice obtained from the demodulator 204 A voice amplifier 205 for amplifying the signal, and a speaker 206 for outputting the signal of the voice amplifier 205.

In addition, a voice amplifier 210 for transmitting the signal input through the microphone 211 to the ultrasonic receiver 151 of the hands-free main body 100, an ultrasonic oscillator 209 for generating ultrasonic waves, and a voice amplifier A modulator 208 for changing the ultrasonic waves formed by the ultrasonic wave oscillator 209 in accordance with the strength and weakness of the voice signal to transmit the voice signal amplified by 210, and for transmitting the modulated ultrasonic wave on which the voice signal is loaded. It consists of an ultrasonic transmitter 207.

Meanwhile, the hands-free main body 100 and the ear set 200 have ultrasonic transmitters 105, 207, and an ultrasonic receiver so as to sense signals transmitted and received by the transmitter / receiver 150, 151, 250, and 251 by ultrasonic waves. The ultrasonic transmission sensors 110 and 202 and the ultrasonic reception sensors 111 and 201 are separately provided at 108 and 203, respectively.

In addition, the ultrasonic transmission sensor 110 of the hands-free main body 100 and the ultrasonic transmission sensor 202 of the ear-set 200 to be bi-directional communication between the hands-free main body 100 and the ear set 200 are different channels. It is transmitted through ultrasonic waves of 1 and 2.

Therefore, the operation state of the two-way wireless handsfree set using the ultrasonic wave is as follows.

The hands-free main body 100 of the wireless hands-free set using the ultrasonic waves is supplied with a DC 12V power required for hands-free operation by the power supply unit 120 that supplies power from the cigar jack of the vehicle.

In addition, when a phone call is made through the mobile phone terminal, the mobile phone terminal is connected to the plug 101 connected to the hands-free main body 100, and the voice signal of the mobile phone terminal is amplified by the ultrasonic transmitter 150 through the plug 101. The amplification is input to the unit 102 and amplified, and the amplified speech sound and the ultrasonic wave of the first frequency generated by the ultrasonic oscillator 103 are mixed modulated by the modulator 104.

The mixed modulated ultrasonic waves are amplified by the ultrasonic transmitter 105 and then transmitted through the ultrasonic transmission sensor 110 to transmit ultrasonic waves of a first frequency to the set.

Then, the ultrasonic waves of the first frequency transmitted from the hands-free main body 100 are received through the ultrasonic receiving sensor 201 of the set 200, and the received ultrasonic waves are mixed-modulated ultrasonic waves and voices in the demodulator 204. The signal is separated.

Therefore, the separated voice signal is amplified by the voice amplifier 205 and output through the speaker 206 is delivered to the user's ear.

In addition, the voice from the user's mouth is the voice signal through the microphone 211 of the set 200 is amplified by the voice amplifier 210, the amplified voice and the ultrasonic oscillator 209 The generated ultrasonic wave of the second frequency is mixed modulated by the modulator 208.

The modulated ultrasonic wave of the second frequency is amplified by the ultrasonic transmitter 207 of the ear set 200, the ultrasonic wave of the second frequency is transmitted to the hands-free main body 100 through the ultrasonic transmission sensor 202, the hands-free main body 100 ) Is received through the ultrasonic receiving sensor 111, and the received ultrasonic wave separates the ultrasonic wave and the voice signal from the demodulator 107.

The separated voice signal is amplified by the voice amplifier 106 and sent to the mobile terminal through the plug 101.

On the other hand, since the ultrasonic wave is a sound wave which the human being cannot hear using the hearing because the frequency is larger than the audible frequency of 20 kHz, the wireless hands-free set of the present invention can change the frequency of the ultrasonic wave of the first frequency and the ultrasonic wave of the second frequency at 20 kHz or more. The ultrasonic transmission sensor 110 and the ultrasonic reception sensor 111 of 100 do not cause interference.

In addition, since the ultrasonic transmission sensor 202 and the ultrasonic reception sensor 201 of the ear set 200 are similarly different in frequency, they do not cause interference with each other, which is very useful unlike the conventional wireless hands-free.

 2 is a block diagram illustrating a unidirectional wireless hands-free preset using ultrasonic waves according to an embodiment of the present invention.

 In the wireless hands-free set using the ultrasonic wave of the present invention, when the unidirectional communication is performed between the hands-free body 100 and the ear set 200, the microphone 211 and the ultrasonic transmitter 251 are removed from the ear set 200, and the hands-free body 100 has a structure in which the ultrasonic receiver 151 is removed and the microphone 132 and the voice amplifier 131 are provided.

Therefore, the hands-free main body 100 is provided with an ultrasonic transmitter 150 for transmitting a signal transmitted through the plug 101 connected to the connector or earphone terminal of the mobile phone terminal to the set 200.

The ultrasonic transmitter 150 is amplified by the voice amplifier 102 for receiving a voice signal input through the plug 101, the ultrasonic wave generator 103 for generating ultrasonic waves, and the voice amplifier 102 A modulator 104 for changing the ultrasonic waves formed by the ultrasonic oscillator 103 to transmit the audio signal in accordance with the strength and weakness of the voice signal, an ultrasonic transmitter 105 and an ultrasonic wave for transmitting the modulated ultrasonic waves loaded with the voice signal. It consists of a transmission sensor (110).

In addition, the built-in microphone 132 and the voice input through the built-in microphone 132 to amplify the voice from the user's mouth to the voice amplifier 131 to amplify the mobile phone terminal through the plug 101 Will be sent out.

In addition, the external microphone mounted on the jack separately from the built-in microphone 132 provided in the hands-free main body 100 includes an optional microphone 220 and a boom microphone 230.

In addition, the ear set 200 is for receiving a signal from the ultrasonic receiving sensor 201 and the ultrasonic receiving sensor 201 in order to receive the ultrasonic wave transmitted by the ultrasonic transmitting sensor 110 of the hands-free main body 100. An ultrasonic receiver 203 provided for receiving a signal by the ultrasonic transmitter 105 of the hands-free main body 100 and a demodulator for removing an ultrasonic component from the ultrasonic wave received by the ultrasonic receiver 203 to obtain a voice signal ( 204, a voice amplifier 205 for amplifying the voice signal obtained by the demodulator 204, and a speaker 206 for outputting the signal of the voice amplifier 205.

Therefore, the operation state of the unidirectional wireless handsfree set using ultrasonic waves is as follows.

According to the present invention, when a telephone call is made through the mobile phone terminal, the mobile phone terminal is connected to the plug 101 connected to the hands-free main body 100 to the voice amplification unit 102 of the ultrasonic transmitter of the ultrasonic transmitter through the plug. Input and amplified, the amplified speech sound and the ultrasonic wave generated by the ultrasonic oscillator 103 is mixed modulated by the modulator 104.

The mixed modulated ultrasonic waves are amplified by the ultrasonic transmitter 105 and then transmitted to the set 200 through the ultrasonic transmission sensor 110.

Then, the ultrasonic wave transmitted from the hands-free main body 100 is received through the ultrasonic receiving sensor 201 of the set 200, and the received ultrasonic wave is separated from the ultrasonic wave modulated by the demodulator 204 and the voice signal. .

The separated voice signal is amplified by the voice amplifier 205 and output through the speaker 206 is delivered to the user's ear.

In addition, the hands-free main body 100 has a built-in microphone 132 and a voice input through the built-in microphone 132 to amplify the voice input from the user's mouth in the voice amplifier 131 to amplify the plug ( 101) to the mobile phone terminal.

In addition, the optional microphone 230 and the boom microphone 220, which are external microphones mounted by jacks, are provided separately from the built-in microphone 132 provided in the hands-free main body 100.

3 is a perspective view illustrating an embodiment of the present invention, in which a user adheres a hands-free main body 100 having a double-sided tape attached to the bottom on a dashboard, but not shown in the drawing, but the ear set 200 The earphone is shown as being able to be transmitted and received by wireless communication using ultrasonic waves by plugging in the user's ear.

As described above, according to the present invention, the wireless communication between the handsfree and the ear set is performed using ultrasonic waves, unlike the existing handsfree, the connection line of the earphone does not get caught in the hands or handles, and the user is confused with other users such as the FM wireless handsfree. There is no concern, and unlike infrared wireless handsfree, it is not affected by strong sunlight or other lights, and unlike Bluetooth wireless handsfree, because it uses a fixed frequency, there is no need for additional settings, so it can be used immediately.

As described above, the present invention has been described in detail, but is not limited to the embodiments described within the scope of the technical idea of the present invention, it is apparent to those skilled in the art that the application and applicability in various fields, such applications and As long as the application has substantially the same function, structure and effect, it will be obvious that it belongs to the appended claims.

Claims (9)

A wireless handsfree set; A hands-free main body 100 having a plug 101 connected to a connector or earphone terminal of a mobile phone terminal; An ear set 200 that transmits and receives an ultrasonic wave with the hands-free main body 100; A power supply unit 120 for supplying power to the hands-free main body 100; An ultrasonic transmitter 150 for transmitting a signal transmitted from the mobile phone terminal through the plug 101 to the ear set 200; An ultrasonic receiver 250 provided in the ear set 200 to receive a signal from the ultrasonic transmitter 150. An ultrasonic transmitter 251 for receiving an external input signal and transmitting the external input signal to a hands-free main body; The wireless hands-free set using ultrasonic waves, characterized in that the ultrasonic receiver for receiving a signal transmitted from the ear set 200 to transmit a signal to a mobile phone terminal. The method according to claim 1; The ultrasonic transmitters 150 and 251 include voice amplifiers 102 and 210 for receiving a voice signal input through a plug 101 or a microphone 211; Ultrasonic wave oscillators 103 and 209 for generating ultrasonic waves; Modulators 104 and 208 for changing the ultrasonic waves formed by the ultrasonic wave oscillators 103 and 209 according to the strength and weakness of the voice signals to transmit the voice signals amplified by the voice amplifiers 102 and 210; And an ultrasonic transmitter (105, 207) for transmitting the modulated ultrasonic wave on which the voice signal is carried. The method according to claim 1; The ultrasonic receivers 151 and 250 include ultrasonic receivers 108 and 203 provided for receiving signals by the ultrasonic transmitters 105 and 207; Demodulators 107 and 204 for removing an ultrasonic component from the ultrasonic waves received by the ultrasonic receivers 108 and 203 to obtain a voice signal; Voice amplifiers 106 and 205 for amplifying the voice signals obtained by the demodulators 107 and 204; A wireless hands-free set using ultrasonic waves, characterized in that it comprises a plug (101) and a speaker (206) for outputting a signal from the voice amplifier (106). The method according to claim 1; The ultrasonic transmitter 105, 207 and the ultrasonic receiver 108, 203 are each provided with ultrasonic transmitting sensors 110, 202, and ultrasonic receiving sensors 111, 201. Hands free set. The method according to claim 1; The power supply unit 120 of the hands-free main body 100 is a wireless hands-free set using ultrasonic waves, characterized in that provided in the structure of the cigar plug when mounted in a vehicle. The method according to claim 4; The ultrasonic transmission sensor 110 of the hands-free body 100 and the ultrasonic transmission sensor 202 of the ear set 200 are transmitted through different channels to enable bidirectional communication between the hands-free body 100 and the ear set 200. Wireless hands-free set using ultrasonic waves, characterized in that. The method according to claim 1; When unidirectional communication is implemented between the hands-free body 100 and the ear set 200, the microphone 211 and the ultrasonic transmitter 251 are removed from the ear set 200, and the hands-free body 100 is the ultrasonic receiver 151. Wireless hands-free set using ultrasonic waves, characterized in that the microphone 132 and the voice amplifier 131 is removed. The method of claim 7; Wireless hands-free set using ultrasonic waves, characterized in that the microphone 132 is built into the hands-free main body 100. The method of claim 7; Microphone provided in the hands-free main body 100 is a wireless hands-free set using ultrasonic, characterized in that consisting of an external microphone 220, 230 mounted to a separate jack.

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