KR20000055480A - Hand free device using radio signal - Google Patents

Abstract

The present invention relates to a hand-free device using a radio signal,

A hand-free means (2) for converting the user's voice into a voice signal and transmitting the voice signal to the mobile phone (1), and modulating the voice signal of the other party's caller supplied from the mobile phone according to a specific frequency signal and transmitting it wirelessly;

And a radio receiver (3) for receiving a voice signal transmitted from the hand-free means (2) and outputting it through a speaker. By allowing users to talk, they can use the car audio system installed in the car to talk with the other party without using their hands, as well as the hands-free function using the radio receiver installed in the audio system at home. The present invention relates to a hand free device using a radio signal which is relatively inexpensive and is not limited by an installation space.

Description

Hand free device using radio signal

The present invention relates to a hand-free device using a radio signal, and in particular, in any place where a radio receiver is installed, the mobile phone can be used to talk to the other party without holding a mobile phone. The installed car audio system allows you to talk to the other party, as well as the hands-free function using the radio receiver installed in the audio system at home, so that the radio signal is relatively inexpensive and is not restricted by the installation space. It relates to a hand free device using.

At present, there is a rapid increase in the number of people who use a mobile phone, which is a wireless portable communication device, due to the convenience that can be used without being limited by space.

However, if you use a mobile phone that provides convenience to people, you will not only have to pick up the mobile phone with one hand, but also will not be able to concentrate on driving only to talk to the other party. There was a problem.

Accordingly, there is provided a hand-free device that allows users to make a call without holding a mobile phone in the car. Such a hand-free device is not only expensive, but also easy to install because a high sensitivity microphone and speaker are separately installed in the car. There was a problem that could not be popularized.

In addition, when a user uses a mobile phone in a normal home, when a user receives a phone call while performing a manual operation, the inconvenience of having to pick up the mobile phone by hand and receive a call occurs.

Accordingly, the present invention for solving the above problems is a means for converting the user's training into an electrical signal and supplying to the mobile phone, and converts the voice signal of the other party's voice supplied through the mobile phone to a radio signal of the set frequency band radio receiver By configuring the means to send a call to the other party without a hand holding the mobile phone in any place where the radio receiver is installed, the person using the car audio system installed in the car without using your hand In addition to being able to talk with the caller, it is possible to implement a hands-free function using a radio receiver installed in an audio system in a general home, thereby providing a hand-free device using a radio signal which is relatively inexpensive and is not limited by installation space. The purpose.

Features of the present invention for achieving the above object,

A microphone for converting a user's voice into a voice signal, a first amplifier for amplifying a voice signal input from the microphone and transmitting the voice signal to a mobile phone, a receiver for receiving a voice signal of a counterpart party input through a mobile phone, and a receiver. A second amplifier for amplifying the received voice signal, a frequency generator for generating a predetermined high frequency signal, a variable switch for varying a frequency value generated in the frequency generator according to a user's operation, and the first switch. A hand-free means comprising a modulator for modulating the voice signal output from the amplifying unit according to the high frequency signal output from the frequency generator and transmitting the modulated voice signal through an antenna;

A tuning frequency variable according to a user's operation, a tuner for detecting a voice signal transmitted from the hand-free means among signals received through an antenna, a third amplifier for amplifying the voice signal detected by the tuner, and a third A radio receiver configured to signal-process the audio signal output from the amplifier and output the signal through a speaker;

Characterized in that consisting of.

1 is a block diagram showing a schematic configuration of a hand free device of the present invention.

Figure 2 is a block diagram showing in more detail the hand-free device of the present invention.

Figure 3 is a circuit diagram showing a hand free means applied to the present invention.

Figure 4 is a block diagram showing another embodiment of the present invention.

※ Explanation of code for main part of drawing

1: cell phone 2: hand-free means

3: radio receiver 21: microphone

22, 24, 32: amplifier 23: receiver

25: frequency generator 26: variable switch

27: modulator 31: tuner

33: signal processor 34: speaker

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, FIGS. 1 to 3.

According to the drawings, the present invention is roughly composed of a mobile phone 1, a hand-free means 2, and a radio receiver 3.

The mobile phone 1 is generally used, and has a transmitting device and a receiving device for wireless transmission and reception with a base station, a connection jack for connection of an ear microphone, a hand free device, and a connection with a wireless data communication device. It has a separate connection terminal for

The hand-free means 2 is installed on the front panel of the vehicle in a state of being connected with the mobile phone 1, the microphone 21 for converting the user's growth into a voice signal and the input from the microphone 21 A first amplifying unit 22 for amplifying a voice signal and transmitting the same to the mobile phone 1, a receiving unit 23 for receiving a voice signal of a counterpart party input through the mobile phone 1, and a receiving unit 23 A second amplifier 24 for amplifying a voice signal, a frequency generator 25 for generating a predetermined high frequency signal, and a frequency value generated by the frequency generator 25 according to a user's manipulation A variable switch 26 and a modulator 27 for modulating the voice signal output from the second amplifier 24 according to the high frequency signal output from the frequency generator 25 and transmitting the modulated signal 26 through the antenna ANT1. It consists of.

The microphone 21 is preferably used as a high performance microphone so that the user's development can be faithfully transmitted to the other party, and the first amplifier 22 is connected to the transmitting device of the mobile phone 1 so that The user's voice signal amplified by the amplification unit 22 is configured to be transmitted to the other party through the mobile phone (1).

The receiving unit 23 is connected to the receiving device of the mobile phone 1 to receive the voice signal of the other party received through the mobile phone 1, the first amplifying unit 22 and the receiving unit 23 is a mobile phone Connect with mobile phone's transmitting / receiving device through connection terminal or connection jack of (1).

The frequency generator 25 generates a high frequency signal that can be received by the radio receiver 3, and generates a predetermined high frequency signal which is set as the user operates the variable switch 26, and outputs it to the modulator 27. The high frequency signal output from the frequency generator 25 generates a high frequency signal of a frequency band set in accordance with a user's operation of the variable switch 26 in the frequency band of about 75 MHz to 110 MHz.

The modulator 27 modulates the voice signal output from the second amplifier 24 into a wireless transmission signal. The modulator 27 modulates the voice signal according to the frequency output from the frequency generator 25 to perform an antenna ANT1. Wireless transmission through.

Since the hand-free means 2 configured as described above can be formed relatively small in size, it can be formed in the form of a doll or other accessory so that it can be suspended while connected to the mobile phone 1, and a conventional vehicle charger It can also be embedded inside other car accessories, such as cup hangers, or attached to the front panel of a car.

In other words, the hand free means 2 has the advantage that it is not restricted by the installation place.

And, Figure 3 shows an embodiment of the configuration of receiving a voice signal from the mobile phone 1 of the hand-free means 2 and transmits it to the radio receiver 3,

The first amplifier 22 which amplifies while removing noise from the voice signal input from the microphone 21 includes noise canceling capacitors C8 and C9 and resistors R9 to R11, and an audio signal amplifying transistor Q3. ) And resistors R12 to R16 for determining the amplification ratio of the transistor Q3, and the second amplifier 24 for amplifying the voice signal received from the mobile phone 1 includes a transistor for amplifying the voice signal. Q1), resistors R1 to R5 and capacitors C1 and C2 for determining the amplification factor of the transistor Q1, and the frequency generator 25 for generating a constant frequency signal includes a capacitor C12 and a capacitor. Implemented as an oscillator circuit consisting of a coil (L1), the modulator 27 for modulating the voice signal is composed of a modulation transistor (Q2), a plurality of resistors (R6 ~ R8) and capacitors (C3 ~ C6) Reference numerals C7, C10 to C12 described are capacitors.

On the other hand, the radio receiver 3 receives a radio signal of a predetermined frequency band transmitted over the air wave, and as shown in FIG. 2, a tuner 31, a third amplifier 32, and a signal processor 33. And a speaker 34.

The tuner 31 detects a signal corresponding to a set frequency among the received signals received by the antenna ANT2. The tuner 31 adjusts the tuning lever installed in the radio receiver 3. The tuning frequency is set.

That is, the tuner 31 receives the radio signal corresponding to the tuning frequency set by the user.

The third amplifier 32 is an apparatus for amplifying the received signal detected by the tuner 31, and the signal processor 33 demodulates the received signal amplified by the third amplifier 32 and converts it into an original audio signal. To be output through the speaker 34.

Referring to the operation and effects of the present invention configured as described above are as follows.

First, a user who wants to implement a hand free function using the radio receiver 3 does not use the output frequency of the frequency generator 25 in a general broadcasting station by operating the variable switch 26 of the hand free means 2. The tuning frequency of the tuner 31 is set equal to the output frequency of the frequency generator 25 by adjusting the tuning lever of the radio receiver 3 to the non-frequency band.

Then, when a call is made to the mobile phone 1, the user opens the flip or inputs a call key to switch the mobile phone 1 to the call state, so that the voice signal transmitted from the other caller is the receiving device of the mobile phone 1. It is input to the receiving unit 23 of the hand-free means 2 and the user's training is converted into an electrical signal through the microphone 21 and then amplified by the first amplifier 22 to transmit the transmission device of the mobile phone 1 Is sent to the other party.

At this time, the voice signal of the other party's call input to the receiver 23 is amplified by the second amplifier 24 and then supplied to the modulator 27, the frequency generator 25 is a frequency signal of a predetermined frequency band Is generated and supplied to the modulator 27, and the modulator 27 modulates the input voice signal according to the frequency signal input from the frequency generator 25 and transmits the radio signal through the antenna ANT1.

The voice signal wirelessly transmitted through the antenna ANT2 is tuned by the tuner 31 of the radio receiver 3, amplified by the third amplifier 32, and then supplied to the signal processor 33, and the signal The processor 33 demodulates the input voice signal and outputs the same to the speaker 34, so that the voice of the other party's voice is output through the speaker 34 so that the user can hear it.

As described in the above description, the present invention uses the general radio receiver 3, and thus has the advantage that the location is not limited when the handfree function is implemented.

That is, if the user wants to implement the hands-free function in the vehicle, the user can easily set the tuning frequency of the radio receiver of the car audio installed in the vehicle to be the same as the transmission frequency of the hand-free means 2. If you want to implement a hand-free function in a general home, by setting the tuning frequency of the radio receiver of the audio system provided in the home the same as the transmission frequency of the hand-free means (2) easily hand-free even in a normal home You can implement the functionality.

On the other hand, Figure 4 shows another embodiment of the present invention,

The first tuner 51 for detecting a signal of a specific frequency band set by a user among the signals received through the antenna ANT2, and the fourth amplifier 52 for amplifying the signal detected by the first tuner 51. And, in the radio receiver 50 comprising a signal processing unit 54 for signal processing so that the audio signal output from the fourth amplifier 52 is output through the speaker 53,

A microphone 41 for converting a user's voice to a voice signal, a first amplifier 42 for amplifying a voice signal input from the microphone 41 and transmitting the voice signal to the mobile phone 1, and a mobile phone 1; The receiver 43 receives the voice signal of the other party's caller, the second amplifier 44 amplifies the voice signal received by the receiver 43, and the voice signal is output from the second amplifier 44. A code generator 45 for outputting a predetermined code when outputted, and a synthesizer for synthesizing the code output from the code generator 45 at the front of the voice signal output from the second amplifier 45; 46, a frequency generator 47 for generating a predetermined high frequency signal, and an audio signal modulated according to the high frequency signal output from the frequency generator 47 by modulating the audio signal output from the synthesizer 46; Hand-free means (40) comprising a modulator (48) for transmitting via ANT1;

A second tuner 55 for detecting only the signal of the frequency band transmitted from the hand-free means 40, a third amplifier 56 for amplifying the signal output from the second tuner 55, and the second tuner 55; It is included in the switching unit 57 and the signal detected by the second tuner 55 to select one of the output of the first tuner 51 or the output signal of the second tuner 55 to output to the signal processing unit 54 Read the code, and if the result matches the previously stored code, the switching unit 57 is switched to the second tuner 55, and if there is no signal detected by the second tuner 55, the switching unit 57 A radio receiver comprising a reader 58 for controlling return to its original position;

Characterized in that consisting of.

Referring to the operation of another embodiment of the present invention configured as described above are as follows.

The mobile phone 1 is switched to a call state and the voice signal transmitted from the other party is input to the receiving unit 43, and then amplified by the second amplifying unit 44 and supplied to the combining unit 46, and the code generating unit ( 46 detects when a voice signal is output from the second amplifier 44 and outputs a predetermined code to the synthesizer 46, and the synthesizer 46 is a second amplifier 44. A code is synthesized at the front of the voice signal input from the C) and output to the modulator 48.

The modulator 48 modulates the voice signal output from the synthesizer 46 according to the frequency signal output from the frequency generator 47, and transmits the modulated signal to the radio receiver 50 through the antenna ANT1. The second tuner 55 of the radio receiver 50 receives the audio signal transmitted from the hand free means 40 and outputs it to the amplifier 56 and the reader 58.

The reader 58 detects a code included in the signal detected by the second tuner 55 and compares it with a previously stored code. When the code matches, the reader 57 switches the switching unit 57 to the second tuner ( Switch to 55).

Accordingly, the voice signal amplified by the second amplifier 56 is supplied to the signal processing unit 54 through the switching unit 57 and output as a sound through the speaker 53, so that the user can hear the voice of the other party. You can listen to the hand free function.

That is, another embodiment of the present invention as described above is set in advance the same as the transmission frequency of the hand-free means 40 and the reception frequency of the radio receiver 50, the hand free when the call to the mobile phone (1) The means 40 combines a predetermined code with the voice signal of the other party, modulates it into a signal of a predetermined frequency band, and transmits the code. The radio receiver 50 receiving the voice signal receives the code preset to the received voice signal. If is included so that this voice signal is output through the speaker 53, the hand-free function is implemented.

In another embodiment of the present invention, the transmission frequency of the hand-free means 40 and the reception frequency of the radio receiver 50 are set in advance, and the switching unit 57 of the radio receiver 50 in the hand-free function is set in advance. Is automatically switched to output the speaker of the other party through the speaker 53, so that the user does not have to tune the reception frequency of the radio receiver 50 one by one.

As described above, the present invention converts a user's training into an electric signal and supplies the same to a mobile phone, and converts a voice signal of a counterpart party supplied through the mobile phone into a radio signal of a set frequency band and transmits the radio signal to a radio receiver. By configuring the means, you can talk to the other party without holding your cell phone at any place where the radio receiver is installed, so that the driving user can use the car audio system installed in the car to communicate with the other party. It is a hand-free device using radio signals that are relatively inexpensive and not restricted by installation space by enabling hand-free functions using a radio receiver installed in an audio system as well as making a call.

Claims (2)

A microphone 21 for converting a user's voice into a voice signal, a first amplifier 22 for amplifying a voice signal input from the microphone 21 and transmitting the amplified voice signal to the mobile phone 1, and inputted through a mobile phone A receiver 23 for receiving the voice signal of the other party, a second amplifier 24 for amplifying the voice signal received by the receiver 23, a frequency generator 25 for generating a predetermined high frequency signal, and The variable switch 26 allows the frequency value generated by the frequency generator 25 to be varied according to a user's operation, and the high frequency frequency output from the frequency generator by the voice signal output from the second amplifier 24. A hand-free means (2) comprising a modulator (27) for modulating according to a signal and transmitting it through an antenna; The tuning frequency is variable according to the user's operation, and the tuner 31 detects the voice signal transmitted from the hand-free means 2 among the signals received through the antenna, and amplifies the voice signal detected by the tuner 31. A radio receiver 3 comprising a third amplifier 32 and a signal processor 33 for processing a voice signal output from the third amplifier 32 and outputting the same through a speaker; Hand-free device using a radio signal, characterized in that consisting of. The first tuner 51 for detecting a signal of a specific frequency band set by a user among the signals received through the antenna ANT2, and the fourth amplifier 52 for amplifying the signal detected by the first tuner 51. And, in the radio receiver 50 comprising a signal processing unit 54 for signal processing so that the audio signal output from the fourth amplifier 52 is output through the speaker 53, A microphone 41 for converting a user's voice to a voice signal, a first amplifier 42 for amplifying a voice signal input from the microphone 41 and transmitting the voice signal to the mobile phone 1, and a mobile phone 1; The receiver 43 receives the voice signal of the other party's caller, the second amplifier 44 amplifies the voice signal received by the receiver 43, and the voice signal is output from the second amplifier 44. A code generator 45 for outputting a predetermined code when outputted, and a synthesizer for synthesizing the code output from the code generator 45 at the front of the voice signal output from the second amplifier 45; 46, a frequency generator 47 for generating a predetermined high frequency signal, and an audio signal modulated according to the high frequency signal output from the frequency generator 47 by modulating the audio signal output from the synthesizer 46; Hand-free means (40) comprising a modulator (48) for transmitting via ANT1; A second tuner 55 for detecting only the signal of the frequency band transmitted from the hand-free means 40, a third amplifier 56 for amplifying the signal output from the second tuner 55, and the second tuner 55; It is included in the switching unit 57 and the signal detected by the second tuner 55 to select one of the output of the first tuner 51 or the output signal of the second tuner 55 to output to the signal processing unit 54 Read the code, and if the result matches the previously stored code, the switching unit 57 is switched to the second tuner 55, and if there is no signal detected by the second tuner 55, the switching unit 57 A radio receiver comprising a reader 58 for controlling return to its original position; Hand-free device using a radio signal, characterized in that consisting of.