KR200205535Y1 - Hand free car kit - Google Patents

Abstract

The present invention relates to a hand-free car kit, in particular, a microcomputer (1), a mute frequency channel selector (2), a condenser microphone (3), a voice signal amplification unit (4), a microphone mute circuit (5), use Band display section (6), phase lock loop (PLL) circuit section (7), transmission level determination section (8), transmission circuit section (9), buzzer sound generation section (10), main power supply section (11), and terminal section for cell phone connection ( 12) It is easy to install the hand free itself by using the speaker and mobile phone mounting stand to listen to the other party's voice signal. When the user's microphone output signal is wirelessly transmitted to the air through the mobile phone, the voice signal received from the other party is car audio system with the various ambient noise signals flowing through the microphone muted. Since the FM radio band of the output through a speaker installed machine in the car through a specific band driver is capable of performing the opponent and free phone calls to good and accurate quality voice among that does not interfere at all in the running for the deviation.

Description

Hand Free Car Kit

The present invention relates to a Hand Free Car Kit, and more particularly, an FM radio of a car audio system in which a hand-free output signal connected to a mobile phone is wirelessly transmitted from the inside of a car so that there is little crosstalk of radio waves. It is designed to listen to the other party's voice signal through the speaker installed in the vehicle by allowing it to be received in a specific band (that is, a frequency band that does not require FCC approval procedures).

That is, when a mobile communication is performed using the hand free in a car, the condenser microphone output signal of the user installed in the hand free itself is wirelessly transmitted to the air through the mobile phone, and received from the other party and received into the hand free. The voice signal is wirelessly transmitted again to a specific band (of course, a band defined in a frequency band that does not require FCC approval procedures) among the FM radio bands of the car audio system installed in the vehicle so that the driver can play them through the speaker of the car audio system. The present invention relates to a hand-free car kit designed to allow a user to make a free phone call with an accurate and high quality voice without any obstacle to driving his vehicle.

In general, if you hold a cell phone directly in a car and make a wireless phone call with an unspecified number of people, you may not be able to neglect forward driving and may not be able to carry out the necessary measures for safe driving. In fact, many countries have legal sanctions because safety accidents occur frequently under such conditions.

Therefore, in recent years, some have been developed to directly connect the earphone microphone with an integrated handset to a mobile phone, and has been developed a hand-free consisting of a speaker, a microphone and a stand.

However, such earphone microphone or hand free has very small earphone and speaker itself, so it is necessary to tune the voice signal, and it is not possible to completely remove the acoustic and howling. Especially in the case of hand free, the codec IC (CODEC) IC) must be used, there is a problem such as difficult to install and lack of usability because it is composed of a speaker, a microphone and a mounting.

The present invention has been devised to solve such a conventional problem, and is easy to install and good in use, and when the user wants to perform mobile phone communication using a hand-free in a car, the user's microphone output signal is publicly transmitted through a mobile phone. The voice signal received from the other party is transmitted to the speaker of the car audio system through a specific band among the FM radio bands of the car audio system installed in the vehicle while the various ambient noise signals introduced through the microphone are muted. The purpose of the present invention is to provide a hand-free car kit that allows a driver to make a free phone call with an accurate and high-quality voice without any obstacle to driving the vehicle.

An object of the present invention described above, and a microcomputer to perform the overall control function of each part in the hand-free through a predetermined program; A mute frequency channel selector for setting a desired FM frequency band among the FM radio bands of the car audio system; A condenser microphone for converting a voice signal spoken by a user into an electrical signal; A speech voice signal amplifier for amplifying an output signal of the microphone to a predetermined level and transmitting the signal to a mobile phone; A microphone mute circuit unit for muting the ambient noise signal including the user's voice signal flowing through the microphone under the control of the microcomputer when the voice signal of the other party is input to the transmission circuit unit through a mobile phone; A use band display unit for displaying a use FM frequency band selected by a user among FM radio bands of a car audio system while a predetermined voice signal is output from the microphone under the control of the microcomputer; The phase difference between the two oscillators is detected so that the oscillation frequency to receive the specific data outputted from the microcomputer, the clock frequency and the periodic signal, and output to each part coincide or coincide with the frequency of the input signal or the reference oscillator. A phase lock loop (PLL) circuit portion for controlling the respective portions by means of the control unit; A transmission level determining unit for determining a level of a voice signal to be transmitted wirelessly to an FM radio side in a car audio system of a predetermined band; A transmission circuit unit configured to wirelessly transmit the voice signal of the other party received through the mobile phone to have a level corresponding to the transmission level determining unit; A buzzer sound generator for selectively generating a buzzer sound in response to the control of the microcomputer (for example, when a call is received); A main power supply unit supplying a voltage required for driving each unit; This can be achieved by providing a power supply terminal, a data transmission terminal and an audio signal transmission terminal, and a terminal unit detachably coupled to a data control connector of a mobile phone.

Therefore, it can be easily installed and used in a car, and when the user wants to perform mobile phone communication using a hand-free in a car, the microphone output signal of the user is wirelessly transmitted to the air through the mobile phone, and the voice signal received from the other party is When the ambient noise signal including the user's voice signal that can flow through is muted, it is output to the speaker of the car audio system through a specific band among the FM radio bands of the car audio system installed in the car. You will be able to make free phone calls with the other party with good and accurate voice without any obstacle to driving.

1 is a block diagram of a hand-free car kit of the present invention.

Explanation of symbols on the main parts of the drawings

1: Microcomputer 2: Mute frequency channel selector

3: condenser microphone 4: audio signal amplifier

5: microphone mute circuit 6: use band display

7: Phase lock loop (PLL) circuit part 8: Transmission level determining part

9: transmission circuit unit 10: buzzer sound generating unit

11: main power supply 12: terminal for connecting the mobile phone

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a block diagram of the hand-free car kit of the present invention.

According to this, the microcomputer (1) for performing the overall control function of each part in the hand-free through a predetermined program;

A mute frequency channel selector (2) installed to set a desired FM frequency band among FM radio bands of the car audio system;

A condenser microphone 3 for converting a voice signal spoken by a user into an electrical signal;

A speech sound signal amplifying unit 4 for amplifying the output signal of the microphone 3 to a predetermined level and transmitting it to the cellular phone;

When the voice signal of the other party is inputted to the transmission circuit unit 9 through a mobile phone, the microphone mute mutes the ambient noise signal including the user's voice signal flowing through the microphone 3 under the control of the microcomputer 1. A circuit section 5;

A use band display unit 6 for displaying a use FM frequency band selected by a user among FM radio bands of a car audio system while a predetermined voice signal is output from the microphone 3 under the control of the microcomputer 1;

The phase difference between the two oscillators is adjusted so that the oscillation frequency to be outputted to each part by receiving the specific data outputted from the microcomputer 1 and the clock frequency and the periodic signal coincides with the frequency of the input signal or the reference oscillator. A phase lock loop (PLL) circuit portion 7 which detects and thereby controls each portion;

A transmission level determination section 8 for determining a level of a voice signal to be transmitted wirelessly to an FM radio side in a car audio system of a band determined by a user at a predetermined level;

The voice signal of the other party received through the mobile phone is converted into the FM frequency band set by the user through the mute frequency channel selector 2, and at the same time, it has a level determined by the transmission level determiner 8 so that it is wirelessly aired. A transmission circuit section 9 for transmitting and receiving at the FM radio section of the car audio system;

A buzzer sound generator (10) for selectively generating a buzzer sound when a call is received in response to the control of the microcomputer (1);

A main power supply unit 11 for supplying a voltage for driving each unit;

A mobile phone equipped with a power supply terminal (VCC, GND), a data transmission / reception terminal (RX-DATA, TX-DATA) and an audio signal transmission / reception terminal (RX-AUDIO, TX-AUDIO) and detachably coupled with the data control connector of the mobile phone. It is characterized by consisting of the connecting terminal portion 12.

On the other hand, the car audio system installed in the car and the mobile phone itself is known and at the same time there is no particular difficulty in explaining the present invention, the illustration is omitted from the first phase.

Referring to the operation and effect of the present invention hand free car kit is configured as follows.

First, the hand-free car kit of the present invention may be integrated into the interior of the car audio system of the present invention and expose only the condenser microphone 3 and the terminal portion 12 for connecting the mobile phone to the outside. In this case, the hand-free car kit itself may be installed on a specific part of the car that does not interfere with driving so that only the mobile phone can be selectively connected to the mobile terminal connection terminal 12.

In addition, the user of the mobile phone is provided with the power supply terminals (VCC, GND), data transmission and reception terminals (RX-DATA, TX-DATA) and audio signal transmission and reception terminals (RX-AUDIO, TX-AUDIO) after boarding the car. The mobile terminal is connected to the terminal 12 for mobile phone connection, and the mute frequency channel selector 2 is properly operated to set the desired FM frequency band among the FM radio bands of the car audio system, and then the car audio system is turned on to the FM radio. You can choose.

In this way, when the user sets the desired FM frequency band through the mute frequency channel selector 2, the phase lock loop circuit 7 in the microcomputer 1 performing the overall control function of each part in the hand free through a predetermined program. ) And the transmission circuit unit 9 are properly controlled to be converted into the FM frequency band set by the user every time a voice signal is received from the counterpart.

On the other hand, when the call comes from the unspecified person to the mobile phone in the above state, the microcomputer 1 recognizes this and drives the buzzer sound generator 10, so the user has received a call to the mobile phone through the buzzer. Recognize and conduct a call.

At this time, the voice signal spoken by the user is converted into an electrical signal through the condenser microphone 3 and then amplified to a predetermined level through the voice signal amplification unit 4 and transmitted to the mobile phone side through the terminal unit 12 for connecting the mobile phone. As with a conventional cellular phone, the radio is transmitted through the antenna of the cellular phone to the air.

As described above, when the voice signal of the other party received through the mobile phone is input to the transmission circuit unit 9 while the user is talking to the other party through the microphone 3, the microcomputer 1 controls the microphone mute circuit unit 5. To mute the ambient noise signal including the user's voice signal flowing through the microphone 3, and the howling is generated by the ambient noise signal including the user's voice signal and various sound signals output through the car audio speaker. Can be prevented.

In addition, in the use band display unit 6 which is composed of approximately two light emitting diodes and is controlled by the microcomputer 1, a user of the FM radio band of the car audio system is output while a predetermined voice signal is output from the microphone 3. You can find out which FM frequency band you use.

On the other hand, the other party's voice signal received through the mobile phone and input to the transmission circuit unit 9 through the mobile phone connection terminal unit 12 is converted into an FM frequency band previously set by the user through the mute frequency channel selector 2. At the same time, the transmission level determining unit 8 has a predetermined level and is wirelessly transmitted to the air through the antenna.

Therefore, the FM radio unit of the car audio system that is already on receives the voice signal of the other party, which is FM radio transmitted in the same band as its reception band, and amplifies it to the volume level set in itself. Since the car outputs through the car audio speakers installed in the car, the user can listen to the other party's voice signal with little noise.

Of course, the hand car kit itself of the present invention is driven by the output voltage of the main power supply unit 11 to convert the power supply voltage supplied through the mobile terminal connection terminal 12 to a predetermined voltage.

As described above, according to the present invention, since there is no need to install a speaker and a cell phone mounting stand for listening to the other party's voice signal, the installation of the hand free itself is simple and easy to use, and the mobile phone using the hand free in a car The user's microphone output signal is wirelessly transmitted to the air through the mobile phone when the communication is to be performed, and the voice signal received from the other party is installed in the car with muted ambient noise signals flowing through the microphone. A specific band among the FM radio bands of the audio system is output through the speaker for the car audio system already installed in the car, so that the driver can freely call the other party with accurate and high quality voice without any obstacle to driving. I can make a call and am very It will yonghan inventors.

Claims (1)

A microcomputer 1 which performs overall control of each part in the hand-free through a predetermined program; A mute frequency channel selector (2) installed to set a desired FM frequency band among FM radio bands of the car audio system; A condenser microphone 3 for converting a voice signal spoken by a user into an electrical signal; A speech sound signal amplifying unit 4 for amplifying the output signal of the microphone 3 to a predetermined level and transmitting it to the cellular phone; When the voice signal of the other party is inputted to the transmission circuit unit 9 through a mobile phone, the microphone mute mutes the ambient noise signal including the user's voice signal flowing through the microphone 3 under the control of the microcomputer 1. A circuit section 5; A use band display unit 6 for displaying a use FM frequency band selected by a user among FM radio bands of a car audio system while a predetermined voice signal is output from the microphone 3 under the control of the microcomputer 1; The phase difference between the two oscillators is adjusted so that the oscillation frequency to be outputted to each part by receiving the specific data outputted from the microcomputer 1 and the clock frequency and the periodic signal coincides with the frequency of the input signal or the reference oscillator. A phase lock loop (PLL) circuit portion 7 which detects and thereby controls each portion; A transmission level determination section 8 for determining a level of a voice signal to be transmitted wirelessly to an FM radio side in a car audio system of a band determined by a user at a predetermined level; The voice signal of the other party received through the mobile phone is converted into the FM frequency band set by the user through the mute frequency channel selector 2, and at the same time, it has a level determined by the transmission level determiner 8 so that it is wirelessly aired. A transmission circuit section 9 for transmitting and receiving at the FM radio section of the car audio system; A buzzer sound generator (10) for selectively generating a buzzer sound when a call is received in response to the control of the microcomputer (1); A main power supply unit 11 for supplying a voltage for driving each unit; A mobile phone equipped with a power supply terminal (VCC, GND), a data transmission / reception terminal (RX-DATA, TX-DATA) and an audio signal transmission / reception terminal (RX-AUDIO, TX-AUDIO) and detachably coupled with the data control connector of the mobile phone. Hand-free car kit, characterized in that consisting of the connecting terminal portion (12).