KR20070122298A - Hands free apparatus for vehicle and control method thereof - Google Patents

Abstract

A hands-free device for a vehicle, and a control method thereof are provided to be used by using kept pairing information without performing a new pairing operation by keeping the pairing information and selecting the pairing information by a user in case of a paired cellular phone. A hands-free device for a vehicle comprises a user selection button unit(40), a pairing information keeping unit(45), and a hands-free control unit(31). The user selection button unit is used to select a user who uses a hands-free function. The pairing information keeping unit keeps pairing information between first and second Bluetooth modules(38,39) at a designated area according to a selection of the user selection button unit. The hands-free control unit reads the pairing information of the designated area and performs the hands-free function by connecting the first and second Bluetooth modules mutually, according to the selection of the user selection button unit. A control method thereof includes a step of displaying a no-presence of the pairing information as the pairing information is not read; a step of reading the pairing information from the designated area when changing the selection of the user, and performing a pairing operation as the selection of the user is not changed; a step of keeping the pairing information at the designated area according to the user selection button unit by performing the pairing operation; a step of trying to connect a cellular phone(34) through the pairing information obtained by the pairing operation or the pairing information read from the first step; and a step of performing the hands-free function and displaying a connecting condition of the cellular phone.

Description

HANDS FREE APPARATUS FOR VEHICLE AND CONTROL METHOD THEREOF

FIG. 1 is a block diagram illustrating a typical Bluetooth hands-free vehicle vehicle.

2 is a block diagram showing a vehicle hands-free device for a Bluetooth system according to the present invention.

3 is a flowchart illustrating a method of controlling a vehicle hands-free device for a Bluetooth vehicle according to the present invention.

   -Explanation of symbols for the main parts of the drawings-

21: Tuner 22: Cassette Tape Recorder

23: CD changer 24: Car audio control

25: DSP unit 26: amplification unit

27: speaker 28: microphone

29: earphone output unit 30: call button unit

31: Hands Free Control 34: Mobile Phone

36: earphone 37: display

38: first Bluetooth module 39: second Bluetooth module

40: user select button 45: pairing information storage unit

The present invention relates to a vehicle hands-free device and a control method thereof, and more particularly, when a plurality of drivers want to use a vehicle equipped with a Bluetooth-type vehicle hands-free device, the vehicle hands-free device must be paired with its mobile phone. In the case of a mobile phone that has been paired to alleviate the inconvenience, it is possible to save the pairing information and then select it by the user so that the user can use the vehicle handsfree device directly through the stored pairing information without performing a new pairing. And a control method thereof.

Nowadays, due to the development of electronic devices, in order to improve the performance of automobiles, many rely on the control of electronic devices. In particular, a variety of sensors are used to improve the performance of the engine to generate the optimum engine efficiency, increasing the reliability of the vehicle. In addition, the development of such electronic devices is applied to not only actual engine driving but also safety devices for driving driver safety, various additional devices for driving convenience, and driving devices.

In particular, an audio system is installed for the driver's convenience and comfortable driving conditions, and a radio for listening to various information and music transmitted from a broadcasting station, and a cassette tape recorder or CD player for listening to a cassette tape or CD are mounted.

In addition, an increasing number of vehicles are provided with LD players that allow users to watch videos, TVs, or laser disks to enjoy images.

In addition, in recent years, with the development of information and communication, various personal mobile phones, mobile phones or cellular phones (hereinafter referred to as 'mobile phones') have emerged, which is convenient for users to talk freely regardless of place. As a result, its spread is rapidly spreading.

However, in general, a mobile phone cannot directly concentrate on driving because the user directly manipulates the body when making a phone call, and when an emergency occurs during a call, the response rate is slow and the probability of a traffic accident is high. Therefore, the law also regulates the use of mobile phones while driving.

In addition, there is a problem that the user is exposed to harmful electromagnetic waves because the user is in direct contact with the mobile phone main body.

Therefore, in order to solve these problems, a hands-free device in which the mobile phone main body and the handset are separated is used.

Since the hands-free device allows a driver to make a call while the mobile phone is mounted, the mobile phone does not hold the mobile phone by hand, so that the driver does not hold the steering wheel with only one hand as in the related art, and thus can respond more quickly to an accident.

However, in order to use the vehicle hands free device normally, the mobile phone must be mounted on the mobile phone connection part of the vehicle hands free device. There is an inconvenience to be connected between the jacks through the connection cable.

In addition, when a driver makes a phone call while driving while the driver does not connect the cellular phone to the cellular phone connection immediately after boarding, there is a big problem in safe driving when the cellular phone is connected to the cellular phone connection for use of the hands-free device.

In order to solve this problem, a hands-free device has been developed for enabling wireless connection with a mobile phone having a Bluetooth chip in a short range wireless communication method.

FIG. 1 is a block diagram illustrating a typical Bluetooth hands-free vehicle vehicle.

As shown here, first, a car hands free device in which a car audio device and a hands free device are combined will be described.

The tuner 21 demodulates and outputs AM or FM radio broadcasting as a car audio function and demodulates and outputs the audio signal of the baseband, and reads the audio signal recorded on the cassette tape while playing and rewinding the cassette tape. A cassette tape recorder 22 for reproducing and outputting, a CD changer 23 for reproducing and outputting audio signals recorded on a CD as baseband audio signals, a tuner 21, a cassette tape recorder 22, and a CD. A DSP unit 25 for digitally processing the output signal of the changer 23, an amplification unit 26 for amplifying the output signal of the DSP 25 unit and outputting it to the speaker 27, a tuner 21, A car audio control unit 24 is provided for controlling the operation of the cassette tape recorder 22 and the CD changer 23 and for controlling the operation of the DSP unit 25 and the amplification volume of the amplification unit 26.

And a first microphone 28 which is connected to a microphone 28 for converting and inputting a driver's voice signal into an electric signal as a hands-free function and a mobile phone controller (not shown) to transmit and receive a control command and the result and voice transmission / reception data at a set frequency. A second Bluetooth module 39 connected to the Bluetooth module 38 and the hands-free control unit 31 to transmit / receive to / from the first Bluetooth module 38 to transmit / receive control commands and results and voice transmission / reception data at a set frequency. Earphone output unit 29 for outputting a voice signal through the earphone 36 during a call, a call button unit 30 for selecting a general call or a secret call and operating various functions, and a call button unit 30 The control signal and the voice signal input through the microphone 28 according to the state of the second Bluetooth module 39 to wirelessly output to the mobile phone 34 and the call signal input through the second Bluetooth module 39A hands-free control unit 31 for outputting a car audio as well as outputting a call signal input through the second Bluetooth module 39 to the earphone output unit 32 during a secret call is installed.

The car audio controller 24 controls the operation of the tuner 21, the cassette tape recorder 22, the CD changer 23, and the operation of the DSP unit 25 and the amplification unit in order to couple the hands-free device to the car audio. In addition to controlling the amplification volume of the control unit 26, the operation of the hands-free control unit 31 is not only limited to the operation of the car audio, but also amplifies the call signal output from the hands-free control unit 31 to output to the speaker 27. Will perform more functions.

In addition, the operating state of the hands-free control unit 31 is displayed through the display unit 37 of the car audio.

From the above, the first Bluetooth module 38 is connected to a mobile phone controller (not shown) by HCI (HOST CONTROL INTERFACE) to transmit / receive an HCI packet to transmit / receive a control command and, as a result, voice transmission / reception data, and transmit / receive wirelessly. The data packet is modulated, amplified, and transmitted in the set frequency band.

Referring to the operation of the vehicle-type hands-free device of the Bluetooth method as described above are as follows.

That is, when the mobile phone 34 is mounted on the vehicle hands-free device, the first Bluetooth module 38 connected to the mobile phone control unit and the second Bluetooth module connected to the hands-free control unit 31 are connected by the Bluetooth method, which is a proximity wireless communication method. (39) are authenticated with each other through a pairing process, and then connected to each other by forming and transmitting packets to and from the control command and the result and voice transmission / reception data through the set frequency.

That is, when the hands-free control unit 31 outputs a control signal such as incoming / outgoing / ending of the mobile phone 34, the second Bluetooth module 39 wirelessly transmits the received signal and wirelessly receives it from the first Bluetooth module 38. Output to the control unit to control the mobile phone 34. In addition, when the call signal received through the mobile phone 34 is wirelessly transmitted by the first Bluetooth module 38, the call signal is received by the second Bluetooth module 39 and output to the hands-free control unit 31. 31, the call sound is output through the car audio speaker 27 by outputting it to the car audio controller 24.

In this way, when a call is received from the outside to the mobile phone 34 in a state connected to each other by the Bluetooth method, the call button 30 is operated to select a general call and a secret call.

Then, the hands-free control unit 31 transmits a call start signal to the mobile phone 34 to form a call path and simultaneously outputs a call signal input from the mobile phone 34 to the car audio control unit 24. Then, the car audio control unit 24 outputs the sound of the call counterpart through the speaker 27 of the car audio. The driver's call voice is input through the microphone 28 and transmitted from the hands-free control unit 31 to the mobile phone 34 through the mobile phone connection unit 32 to make a phone call.

In addition, since the phone call voice is output through the speaker 27 of the car audio, the phone call sound can be adjusted according to the volume control of the car audio.

At this time, when the car audio is playing a radio broadcast, a cassette tape or a CD, the play of the radio broadcast, a cassette tape or a CD is interrupted for a while, and a call signal input through the hands-free control unit 31 is output.

However, when the secret call is selected in the call button unit 30, the hands-free control unit 31 outputs a call signal input through the mobile phone connection unit 32 to the earphone output unit 29 so that the speaker of the car audio 27 ), The call signal is not output. However, even at this time, the operation of the car audio is paused to allow a phone call.

On the other hand, when the call is completed, the playback of the radio broadcast or cassette tape or CD stopped by the car audio control unit 24 in accordance with the operation of the call button unit 30 to return to normal operation, hands-free control unit 31 In the call to output the end signal to the mobile phone 34 to block the call.

As the mobile phone and the hands-free device are wirelessly connected by the Bluetooth method as described above, when the driver carries the mobile phone with his or her mobile phone in a pocket or with a necklace on his neck, the first Bluetooth module and the second Bluetooth device are connected. By wirelessly connecting to the vehicle hands-free device by the module, the hands-free device can be used without an operation for connection.

However, in the case of a vehicle handsfree device, the cellular phone connected to the vehicle driver's mobile phone performs a handsfree function, and when the vehicle driver changes, the connected mobile phone is also changed. Will perform.

However, the pairing process takes about 1 minute to about 3 minutes, so the hands-free device can be used only when the driver changes each time, so the hands-free device is limited. .

Therefore, when a call is received while performing the pairing as described above, there is a problem in that a call cannot be received through the hands-free device, which greatly affects safe driving.

The present invention has been made to solve the above problems, and an object of the present invention is that when a plurality of drivers want to use a vehicle equipped with a Bluetooth-type vehicle handsfree device, the vehicle handsfree device must be paired with its mobile phone every time. In order to eliminate the inconvenience of using a mobile phone that has been paired, the user can save the pairing information and then select a user's handsfree device without using a new pairing. An apparatus and a control method thereof are provided.

A vehicle hands-free device according to the present invention for achieving the above object is a vehicle hands-free device in which a first Bluetooth module and a second Bluetooth module mounted on a mobile phone are connected to each other to perform a hands-free function. A pairing information storage unit for storing pairing information between the second Bluetooth module and the first Bluetooth module in a designated area according to selection of the user selecting button unit, pairing information according to selection of the user selecting button unit The apparatus may further include a hands-free control unit configured to read pairing information of a designated area from the storage unit and to control the hands-free function by connecting the first to second Bluetooth modules to each other.

In the present invention, the user selection button unit is characterized in that a plurality of buttons operate mutually exclusive.

In addition, the user selection button unit in the present invention is characterized in that the pairing button is included.

In addition, the control method of the vehicle hands-free device according to the present invention includes the first step of reading pairing information in a designated area according to the selected user selection button when the vehicle is started, and the pairing information is read when the pairing information is read in the first step. If not, the second step of indicating that there is no pairing information, the third step of determining whether the user selection is changed after displaying the pairing information is not displayed in the second step, and the first step if the user selection is changed in the third step In step 4, when pairing information is read from the designated area and user selection is not changed, pairing is performed, and in the fourth step, pairing is performed to store pairing information in the designated area according to the user selection button. Step and the pairing information read in the first step or pairing information obtained by performing the pairing in the fourth step. The sixth step of attempting to connect with the mobile phone in the sixth step, and the seventh step of displaying the connection status and performing the hands-free function if the connection is made in the sixth step; And an eighth step of displaying the connection status and returning to the third step of determining whether the user selection has been changed.

The present invention is characterized in that it is determined as the input of the pairing button when determining the state that the user selection is not changed in the fourth step.

The present invention made as described above can reduce the time for performing pairing by reading and pairing pre-stored pairing information according to a user when performing a Bluetooth connection between a Bluetooth-type handsfree device for a vehicle and a mobile phone equipped with a Bluetooth chip. Even if another driver gets on board, the Bluetooth connection is established immediately so that the hands-free function can be used.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, and the same parts as in the prior art use the same reference numerals and names. In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only and those skilled in the art will be capable of many modifications within the technical spirit of the present invention.

2 is a block diagram illustrating a vehicle hands-free device according to the present invention.

The vehicle hands-free device according to the present invention is configured for connection with the cellular phone 34 in a Bluetooth manner, and the configuration of the general hands-free function is the same as that shown in FIG.

However, in the vehicle hands-free device in which the first Bluetooth module 38 and the second Bluetooth module 39 mounted on the mobile phone 34 are connected to each other to perform a hands-free function as shown in FIG. 1, a user who wants to use the hands-free function is provided. For storing pairing information between the second Bluetooth module 39 and the first Bluetooth module 38 in a designated area according to the selection of the user selection button unit 40 and the user selection button unit 40. The pairing information storage unit 45 and the user selection button unit 40 read the pairing information of the designated area from the pairing information storage unit 45 to read the first to second Bluetooth modules 38 and 39. It further comprises a hands-free control unit 31 for controlling to perform a hands-free function by connecting to each other.

At this time, the user selection button unit 40 is operated such that when a plurality of buttons are mutually exclusive and selects any one, the other buttons are turned off.

In addition, the user selection button unit 40 includes a pairing execution button (not shown) so that when the user wants to register by newly performing pairing without changing the user selection.

Therefore, when another driver of the vehicle driving in public wishes to use the hands-free function, the user selects the user from the user selection button unit 40 and pairs in the designated area according to the user selection button of the pairing information storage unit 45. Not only do you read the information and perform pairing with the mobile phone 34 in a short time without using pairing, so you can use the hands-free function. In the case of the new mobile phone 34, This allows you to quickly connect the next time you want to connect.

In addition, the control method of the Bluetooth hands-free vehicle vehicle according to the present invention will be described in detail with reference to the flowchart shown in FIG.

First, when the vehicle is started, power is applied to the hands-free device while the power is applied to perform initialization and read pairing information from the designated area according to the user selection button selected by the user selection button unit 40 (S10).

That is, pairing information is read according to the previously selected state.

At this time, when there is no pairing information in the designated area of the pairing information storage unit 45 when reading the pairing information, it indicates that there is no pairing information (S12) (S14).

However, if there is pairing information, the stored pairing information is read and the mobile phone 34 is connected by pairing information (S22).

Thus, when the mobile phone is connected to the hands-free device via the Bluetooth method (S24), the mobile phone displays the connection state (S28) and performs the hands-free function (S30).

However, when the mobile phone 34 is connected by the read pairing information but is not connected (S24), that is, the pairing information read from the designated area according to the selected user selection button is paired with the mobile phone 34 currently owned by the driver. If it is not stored information is not connected as the connection is not displayed (S26) and determines whether to change the user selection (S16).

On the other hand, it is determined whether the user selection is changed after reading pairing information from the area designated to the user selection button according to the initially selected state, indicating that there is no pairing information (S14) (S16).

If there is no pairing information according to the selected user selection button as described above (S12) or if there is pairing information, the current user is not paired with the pairing information established with the mobile phone 34 (S24). The pairing information is newly read from the designated area according to the selection button (S10) and an attempt is made to connect (S22).

However, when there is no pairing information in the designated area according to the user selection button (S16), that is, when the user wants to perform pairing without changing the user selection button, the user selects through a pairing operation button for performing pairing. It is determined that the button has not changed and newly pairing is performed (S18).

The pairing information authenticated by the new pairing is stored in the designated area according to the user selection button (S20).

The stored pairing information is then read when the mobile phone is connected to the hands-free device via Bluetooth and used to connect directly without performing a new pairing.

In the present invention made as described above, in using the vehicle hands-free device mounted on a vehicle used by a plurality of drivers, the driver reads the pairing information authenticated from his / her mobile phone 34 from the pairing information storage unit 45 and connects them directly. Resolves an issue where hands-free use is restricted during initial pairing, enabling hands-free functionality immediately.

As described above, in order to solve the inconvenience of using the vehicle hands-free device only when a plurality of drivers attempt to use the vehicle equipped with the Bluetooth-type vehicle hands-free device, the mobile hands-free device must be paired each time. In the case of a paired mobile phone, there is an advantage that a user's hands-free device can be used directly through the stored pairing information without newly pairing by selecting the user after storing the pairing information.

Claims (5)

In a hands-free device for a vehicle in which a first Bluetooth module and a second Bluetooth module mounted in a mobile phone are connected to each other to perform a hands-free function, A user selection button unit for selecting a user who wants to use the hands-free function in the above; A pairing information storage unit for storing pairing information between the second Bluetooth module and the first Bluetooth module in a designated area according to the selection of the user selection button unit; A hands-free control unit which reads pairing information of a designated area from the pairing information storage unit and connects the first to second Bluetooth modules to perform a hands-free function according to the selection of the user selection button unit. Vehicle hands-free device characterized in that it further comprises. The hands-free device for a vehicle according to claim 1, wherein the user selection button unit operates a plurality of buttons mutually exclusively. The hands-free device for a vehicle according to claim 1, wherein the user selection button unit includes a pairing execution button. A first step of reading pairing information from the designated area according to the selected user selection button when the vehicle is started; A second step of indicating that there is no pairing information when there is no pairing information when reading the pairing information in the first step; A third step of determining whether the user selection is changed after indicating that there is no pairing information in the second step; A fourth step of returning to the first step when the user selection is changed in the third step, reading pairing information in a designated area, and performing pairing when the user selection is not changed in the third step; A fifth step of storing pairing information in a designated area according to a user selection button by performing pairing in the fourth step; A sixth step of attempting to connect with the mobile phone through pairing information read in the first step or pairing information obtained by performing pairing in the fourth step; A seventh step of displaying a connection state and performing a hands-free function when a connection is made by connecting to the mobile phone in the sixth step; An eighth step of attempting to connect to the mobile phone in the sixth step and returning to the third step of displaying a disconnected state and determining whether the user selection has changed; Control method of a vehicle hands-free device, characterized in that made. The method of claim 4, wherein the determining of the state in which the user selection is not changed in the fourth step is performed by input of a pairing execution button.

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