KR20020046744A - a wireless hand-free unit for a vehicle - Google Patents

Abstract

PURPOSE: A wireless handsfree unit for vehicles is provided so that a handsfree set installed in a vehicle and a user's portable phone can transmit and receive voice data and digital data each other by wireless. CONSTITUTION: A handsfree set(10), installed in a vehicle, transmits and receives data with a driver's portable phone(20) by wireless. The handsfree(10) is connected with a speaker(30) and a microphone(40). Also the handsfree(10) is connected with a battery(50). The handsfree set(10) comprises a control part(12), a power circuit(14), a voice processing part(16), and a Bluetooth chip(18). The control part(12), controlling the whole operation of the handsfree set(10), receives a signal from the Bluetooth chip(18) and outputs it to the voice processing part(16). Also the control part(12) receives a signal from the voice processing part(16) and outputs it to the Bluetooth chip(18). The power circuit(14), supplied power from the battery(50), supplies operation power to the whole of the handsfree set(10). The voice processing part(16) processes the signal inputted from the Bluetooth chip(18) and outputs a voice signal to the speaker(30). Also the voice processing part(16) processes the signal inputted from the microphone(40) and outputs the processed signal to the Bluetooth chip(18). The Bluetooth chip(18) communicates with a Bluetooth chip(28), embedded in the portable phone, through an antenna(19).

Description

A wireless hand-free unit for a vehicle

The present invention relates to a handfree unit, and more particularly, to a wireless handfree unit for a vehicle in which a handset installed in a vehicle and a mobile phone carried by a user can wirelessly transmit and receive voice and digital data to each other.

In recent years, portable wireless telephones (hereinafter referred to as cellular phones) have become widespread and can easily handle tasks performed at offices of a given address within a driving car or on a street. However, as the mobile phone is popularized as described above, various new side effects have occurred.

For example, if a driver wants to talk while driving a vehicle, he needs to drive with one hand while holding a cell phone with the other hand, thus reducing his concentration on driving and the risk of a traffic accident.

In addition, when making a call using a mobile phone, the mobile phone should be in close contact with the caller's ear. In the mobile phone, harmful electromagnetic waves are generated. There was a problem in that it causes a harmful result to the human body.

Therefore, a hand-free unit has been developed and widely used as a device to compensate for the above problems. As shown in FIG. 1, the hand-free unit according to the prior art has a mobile phone mounting stand 2 having a mobile phone 1 detached therefrom. An external microphone 4 and a speaker 5 which are fixed to one side of the vehicle body 3 and electrically connected to the cellular phone mounting base 2 are provided on one side of the vehicle body 3.

The mobile phone holder 2 supplies the battery power of the vehicle to the mobile phone 1 and at the same time outputs a sign language voice signal output from the mobile phone 1 to the speaker 5 to reproduce a sign language sound. The voice call signal input through the microphone 4 is input to the mobile phone 1.

Therefore, the speaker 5 can be used while driving and the handset can be talked without holding the mobile phone 1 by hand as the speaker receives the handset sound and inputs the voice signal using the external microphone 4. .

However, the hand-free unit according to the conventional example as described above, a separate mobile phone holder 2 that can be mounted on the mobile phone 1 in the vehicle, and the mobile phone 1 must be connected to the hand-free set by wire. Therefore, there was a problem that the vehicle is damaged and the appearance is not beautiful.

In addition, there is a problem that every time the mobile phone is changed, a suitable hand preset must be purchased and mounted inside the vehicle.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a wireless handfree unit for a vehicle in which a handfree set mounted in a vehicle and a mobile phone carried by a user can wirelessly transmit and receive voice and digital data to each other. To provide.

1 is a schematic diagram of a vehicle hand-free unit according to the prior art,

2 is a schematic diagram of a wireless hand-free unit for a vehicle according to the present invention;

3 is a block diagram of a wireless hand-free unit for a vehicle according to the present invention;

4 is a block diagram illustrating the Bluetooth chip of FIG. 3.

<Explanation of symbols for the main parts of the drawings>

10: hand preset 12, 22: control unit

14 power supply circuit 16 voice processing unit

18, 28: Bluetooth chip 20: mobile phone

24, 50: battery 26: wireless transceiver

30: speaker 40: microphone

A wireless hand-free unit for a vehicle according to the present invention for achieving the above object includes a hand preset installed in a vehicle with a speaker and a microphone connected thereto, and a signal received from the wireless base station through a speaker of the hand preset. And a mobile phone for outputting and transmitting a signal input from the microphone to a wireless base station through the mobile phone, wherein the hand preset and the mobile phone each have a short range wireless transceiver to wirelessly transmit and receive voice and digital data to each other. It is done.

The short range wireless transceiver is preferably a Bluetooth chip connected to the control unit of the hand preset and the mobile phone, respectively.

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

Figure 2 is a schematic diagram of a wireless hand-free unit for a vehicle according to the present invention, Figure 3 is a block diagram of a wireless hand-free unit for a vehicle according to the present invention.

As shown, according to the present invention, the hand preset 10 and the mobile phone 20 carried by the driver are wirelessly transmitted and received. The hand preset 10 is connected to a speaker 30 for outputting a signal transmitted from the mobile phone 20 as voice while a microphone 40 is connected to transmit voice. In addition, the battery 50 is connected to the hand preset 10 to supply power.

Display means may be further connected to the hand preset 10 to display the data received by the mobile phone 20 as an image.

The hand preset 10 includes a controller 12, a power supply circuit 14, a voice processor 16, and a Bluetooth chip 18. In the embodiment provided with the display means, it further includes an image processor.

The controller 12 controls the operation of the entire hand preset 10, receives a signal from the Bluetooth chip 18, outputs the signal to the voice processor 16, and receives the signal from the voice processor 16. Output to the Bluetooth chip.

The power supply circuit 14 receives power from the battery 50 to supply operating power to the entire hand preset.

The voice processor 16 processes the signal input from the Bluetooth chip 18 to output a voice signal to the speaker 30, and processes the signal input from the microphone 40 to process the Bluetooth chip 18. Will print

The Bluetooth chip 18 is a short-range wireless transceiver for wirelessly communicating with the Bluetooth chip embedded in the mobile phone 20 through the antenna 19, the configuration is shown in FIG.

Bluetooth is a technology specification that wirelessly connects portable PCs, mobile phones and other mobile devices at low cost within a narrow range. It uses radio frequencies to communicate voice and data without the need for physical cables for communication between digital devices.

For example, when Bluetooth technology is implemented in mobile phones and laptops, you no longer need to use the cumbersome cables you currently use to connect mobile phones and laptops. Bluetooth technology can be applied to virtually any digital device, including printers, desktops, fax machines, keyboards and joysticks.

Bluetooth was launched as an open standard when five companies, Ericsson, Nokia, Intel, Toshiba and IBM, formed a consortium called the Bluetooth Special Internet Group (SIG) in 1998. Since then, Lucent Technologies, Motorola, Microsoft, and 3Com have joined the SIG, and its current membership has continued to grow, making Bluetooth a global standard for short-range wireless communications.

The specification and characteristics of Bluetooth are as follows.

First, the Bluetooth Radio module uses a 2.4GHz ISM (Industrial Scientific Medical) method to provide a maximum rate of 1Mbps. In addition, a frequency hop transceiver technique is applied to reduce the effects of fading interference, and a modulation scheme uses a binary FM method.

In FIG. 4, a baseband module carries a baseband protocol and provides a routing function with a low level link of a remote device, and a link manager protocol (LMP) provides link control functions such as link setup. In addition, the L2CAP (Logical link Control and Adaptation Protocol) module provides upper layer protocol multiplexing, packet fragment reassembly, and quality of service (QOS). RECOMM is also an upper layer of L2CAP and provides the function of transmitting data transmitted from the application layer.

In addition, Bluetooth is a protocol that provides a short-range wireless link function between electronic devices in a home and an office (radius 10m), and configures an ad hoc network between stationary and mobile devices so that File Transfer, Dial up networking Synchronization, 3 in 1 Features include Phone, Ultimate Handset, Computer Speak Phone, Cordless Computer and Conference Table.

Accordingly, Bluetooth is installed in devices such as printers, PDAs, desktops, fax machines, keyboards, joysticks, and the like to provide voice and non-voice services wirelessly.

The wireless access technology provided by Bluetooth is based on ad hoc network and provides data service using TCP / IP in the piconet environment and interface functions such as host interface device (HID), object exchange protocol (OBEX) and audio. to provide. Bluetooth Radio provides fast sensing of the environment and frequency hopping to provide a stable link in noisy environments.

In addition, compared to other systems using the same frequency band, it has the advantage of excluding interference by other signals as much as possible by using a small packet and a hopping function to a new frequency quickly. In particular, Bluetooth Radio can reduce the effects of random noise generated in a long-distance link environment through FEC (Forward Error Correction) for error recovery.

Bluetooth transmission provides a full-duplex approach that combines circuit and packet switching modes based on time division duplex (TDD). Packets used in Bluetooth generally use one TDD slot, but can be extended to five slots.

The TDD slot has characteristics of providing synchronous and asynchronous channels, providing one asynchronous data channel and up to three synchronous voice channels, and supporting synchronous voice channels of 64 kb / s.

Asynchronous channels provide up to 57.6 kb / s in the carrier direction, up to 432.6 kb / s in the symmetrical link, and up to 721 kb / s in any direction. It consists of radio unit, link control unit, link management unit, and software function unit.

The mobile phone 20 includes a control unit 22, a battery 24, a wireless transceiver 26, and a Bluetooth chip 28.

In addition, the mobile phone 20 is provided with a display unit 23 for displaying the current state, the connection state, etc. of the mobile phone, the selection circuit 25 to perform wireless communication only between the wireless base station when not in use with the hand preset 10 ) Is provided. The mobile phone 20 is provided with a speaker and a microphone (not shown), and preferably has all the functions of a known general mobile phone.

The controller 22 controls the overall operation of the mobile phone 20, receives a signal from the wireless transceiver 26 and outputs the signal to the Bluetooth chip 28, the signal received through the Bluetooth chip 28 Is output to the wireless transceiver 26.

The battery 24 supplies operating power to the entire mobile phone.

The radio transceiver 26 transmits a signal input from the Bluetooth chip 28 to the radio base station through the antenna 27, and outputs a signal received from the radio base station to the Bluetooth chip 28.

The Bluetooth chip 28 is a short range wireless transceiver for wirelessly communicating with the Bluetooth chip 18 embedded in the hand preset 10 through an antenna 29. Since the Bluetooth chip 28 is the same as the Bluetooth chip 18 embedded in the hand preset 10, a description thereof will be omitted.

In the vehicle wireless hand-free unit according to the present invention configured as described above, the signal propagated from the wireless base station is received through the wireless transceiver 26 connected to the antenna 27 of the mobile phone 20, this signal is the control unit 22 Under the control of the Bluetooth chip 28 is adapted to the short-range wireless protocol is transmitted through the antenna 29.

The signal transmitted through the antenna 29 is received through the Bluetooth chip 18 connected to the antenna 19 of the hand preset 10, and then the voice processor 16 converts the voice signal and outputs it to the speaker 30. The speaker 30 reproduces the voice.

On the other hand, the voice input to the microphone 40 is converted into a voice signal is output to the Bluetooth chip 18 through the voice processor 16. The Bluetooth chip 18 converts the input signal into a short-range wireless communication protocol and transmits it through the antenna 19.

The signal transmitted through the antenna 19 is received through the Bluetooth chip 28 connected to the antenna 29 of the mobile phone 20, and then transmitted to the wireless base station through the wireless transceiver 26.

When the mobile phone 10 is not used together with the hand preset 10, the selection circuit 25 is operated by a selection switch (not shown) to perform wireless communication only between wireless base stations and use it as a general mobile phone.

The present invention is not limited to the above embodiment and can be implemented in various modifications.

According to the wireless hand-free unit for a vehicle according to the present invention, since the hand-free set mounted in the vehicle and the mobile phone carried by the user can wirelessly transmit and receive voice and digital data to each other, a separate mobile phone stand is unnecessary, and therefore, The appearance is beautiful, and every time the phone changes, there is no need to purchase a suitable hand preset and install it inside the vehicle.

Claims (2)

A speaker and a microphone are connected to a hand preset installed in a vehicle, and a mobile phone which receives a signal from the wireless base station, outputs the signal through the speaker of the hand preset, and transmits a signal input from the microphone to the wireless base station through the mobile phone. Understand, And the near-field wireless transmission / reception unit is configured to wirelessly transmit and receive voice and digital data to each other. The method of claim 1, And the short range wireless transceiver is a Bluetooth chip connected to the control unit of the hand preset and the mobile phone, respectively.