KR19980068220A - Audio output control device when using mobile phone in vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hands-free device that facilitates the use of a portable phone in a vehicle. The present invention relates to a hands-free device that can prevent a call interruption due to the audio output of a vehicle when making or receiving a call using the hands-free device for a mobile phone. The present invention relates to an audio output control device when using a mobile phone in a vehicle.

Features of the device of the present invention include a portable terminal (8); An interface 6 for exchanging data with the portable terminal and a hands-free circuit 4 connected to the portable terminal through the interface and the hands-free circuit and the interface are generated to generate an audio output level attenuation control signal during call origination and reception. The voltage stabilization circuit 2 and the noise filter 3 for stabilizing the voltage of the car audio volume control circuit 5 and the vehicle battery, removing power supply noise, and then applying an operating voltage to the hands-free circuit and the car audio volume control circuit. Hands free kit module (7) comprising; Vehicle audio volume for attenuating the voice output from the vehicle audio 9 transmitted to the vehicle speaker 11 by the generation of the output from the car audio volume control circuit of the hands-free module according to the call origination and call initiation. It includes a control device (10).

In the present invention, when the mobile phone using the hands-free device in the vehicle is used, since the audio output in the vehicle is automatically attenuated to a level that does not interfere with the call, it becomes convenient to use the mobile telephone device.

Description

Audio output control device when using mobile phone in vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hands-free device that facilitates the use of a portable telephone in a vehicle. In particular, an audio output level of a vehicle may be adjusted when making a call or receiving a telephone call using a hands-free apparatus for a mobile telephone equipped with a voice dial function. The present invention relates to an audio output control device when using a mobile phone in a vehicle for automatically dropping or muting a predetermined value.

The recent rapid spread of personal mobile phones has led to an increase in the proportion of mobile phones installed in vehicles. Therefore, a large number of vehicle drivers exchange phone calls with the other party while the vehicle is in operation. At this time, the vehicle driver attempts to make a call or talks with the other party while holding the steering wheel with one hand and a mobile phone with the other hand. The driver's distractions are very likely to cause traffic accidents.

As a countermeasure against this, hands-free devices have been well received by vehicle drivers, allowing them to make calls without using the phone body when using mobile phones in vehicles. .

Hands-free devices typically include a signal amplifier, a microphone and a speaker, which are connected to the portable terminal via an interface. When making or receiving a call in a vehicle using such a hands-free device, if the volume of the vehicle audio is set to a large value, the user may feel uncomfortable with the call. The operation to turn off is performed.

The audio operation when using such a mobile phone is very likely to cause an accident by reducing the concentration on driving a vehicle, and also brings the inconvenience that requires manual operation of the driver.

An object of the present invention is to detect the audio output of a vehicle when making a call or receiving a call using a hands-free device that facilitates the use of a portable telephone in a vehicle so that the current audio level may interfere with the telephone call. In the case of exceeding, the audio level is automatically attenuated or muted, thereby providing an audio output control device when using a mobile phone in a vehicle that can prevent a mobile phone call interruption by vehicle audio.

The device of the present invention is characterized by a portable terminal; Car audio volume control to generate an audio output level attenuation control signal when a call is made or received by being connected to the hands-free circuit and the hands-free circuit and the interface connected to the portable terminal through the interface for data exchange with the portable terminal. A hands-free kit module including a voltage stabilization circuit and a noise filter for stabilizing the voltage of the circuit and the vehicle battery, removing power supply noise, and applying an operating voltage to the hands-free circuit and the car audio volume control circuit; It is to include a vehicle audio volume control device for attenuating the audio output from the vehicle audio transmitted to the vehicle speaker to a minute value by the output generated from the car audio volume control circuit of the hands-free module according to the call origination and call reception Can be characterized.

1 is a circuit diagram of an apparatus of the present invention.

2 is a flowchart illustrating the operation of the apparatus of the present invention.

* Description of the symbols for the main parts of the drawings *

1: vehicle battery 2: voltage stabilization circuit

3: noise filter 4: hands-free circuit

5: car audio volume control circuit 7: handsfree kit module

8: handheld terminal 9: vehicle audio

10: vehicle audio volume control device

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

1 is a circuit diagram of a device of the present invention. As referred to herein, the handsfree kit module 7 includes a hands-free circuit 4 and a car audio volume control circuit 5 for receiving and processing audio volume control signals from the hands-free circuit and the hands-free circuit and car audio control volume. A data interface 6 connected to a control circuit, a power supply noise removing noise filter 3 for supplying an operating voltage to the hands-free circuit and a difference audio control volume control circuit, and a voltage stabilization circuit for stabilizing an input DC voltage ( It consists of 2).

The voltage stabilization circuit 2 in the handsfree module 7 is connected to the voltage of the vehicle battery 1 mounted on the vehicle, and the portable terminal is connected to the interface 6 of the handsfree module 7. The data port of (8) is connected and configured.

In addition, the vehicle audio volume control circuit 5 of the hands free kit module 7 is connected to the vehicle audio volume control device 10 so that mutual data exchange occurs, and the vehicle audio 9 applied to the vehicle speaker 9 '. Configure the output of) to be adjusted.

An operation process of the apparatus of the present invention configured as described above will be described in detail based on the flowchart of FIG. 2.

First, when the DC voltage of the vehicle battery 1 is applied to the hands-free kit module 7 mounted on the vehicle, it is converted to a constant voltage through the voltage stabilization circuit 2 and then through the noise filter 3 to the hands-free circuit 4. The primary audio volume control circuit 5 is applied with an operating voltage (see steps 1.2 and 11). At this time, the noise filter 3 serves to bypass the noise component introduced through the power supply voltage supply line to the ground side.

When the portable terminal 8 is mounted on the hands free kit module 7 to which the voltage of the vehicle battery is applied, the data port of the portable terminal is connected to the hands free circuit 4 and the car audio volume control circuit through the interface 6. 5) and initialized (see third step 13).

In step 4, it is determined whether a call is received from the outside in the standby mode according to the initialization of the hands-free kit device. At this time, if the call determination result is called, it is recognized by the car audio volume control circuit 5 through the interface 6 connected to the portable terminal, and the car audio volume control circuit is the car audio volume control device. The current audio level information from (10) is read to determine whether to execute the volume automatic adjustment operation.

At this time, if the audio of the vehicle is turned off or below a preset level that does not interfere with the telephone call, the car audio volume control circuit 5 does not emit any control signal to the vehicle audio volume control device 10 side. If the output level of the vehicle audio 9 is greater than or equal to the preset level, the car audio volume control circuit 5 outputs an audio volume down or audio mute control signal to the vehicle audio volume control device 10 to output the vehicle speaker 9 '. The audio output of the vehicle audio 9 to the vehicle audio volume control device 10 is controlled by the vehicle audio volume control device 10 (see step 6).

This process is similarly performed by the execution of the fifth step 15, in which the call is made using the handsfree device in the vehicle. That is, if the audio of the vehicle is turned off or less than the setting level that does not interfere with the telephone call, the car audio volume control circuit 5 recognizes this and does not emit any control signal to the vehicle audio volume control device 10 side. However, if the output level of the vehicle audio 9 is greater than or equal to the preset level, the car audio volume adjusting circuit 5 outputs an audio volume down or audio mute control signal to the vehicle audio volume adjusting device 10 side to output the vehicle speaker 9. It is to automatically adjust the volume of the vehicle audio so that the audio output of the vehicle audio 9 for ') does not interfere with the telephone call.

On the other hand, in the state where the audio output of the vehicle is attenuated by the execution of the sixth step (16), the judging step of whether or not the call of the mobile phone using the hands free kit is terminated, that is, the seventh step (17) of determining whether the call is interrupted or not. To run.

As a result, when the call interruption is recognized by the car audio volume control circuit 5 through the interface 6, the car audio volume control circuit 5 is used as the audio output condition immediately before the call to the car audio volume control device 10. After performing the eighth step (18) to restore the original state and control the output of the vehicle audio (9) to be normally output to the vehicle speaker (9 '), go back to the third step (13) and execute again after the system initialization step. do.

In this way, the output of the vehicle audio is automatically restricted when the mobile phone is transmitted and received using the handsfree kit in the vehicle, thereby making it convenient to use the mobile phone.

As described above, the present invention is intentionally made by the driver to avoid the interruption of the audio output when the call is made or the call is received under the condition that the audio volume value of the vehicle is set to a large value. Automatic recognition and volume control are performed by the device of the present invention even if the audio volume of the vehicle is not lowered or turned off, so that the concentration of power required for driving the vehicle is not reduced when using the mobile phone using the handsfree device installed in the vehicle. Thus, the possibility of a vehicle accident can be lowered, and the effect of making the use of a mobile phone in the vehicle convenient is shown.

Claims (1)

A hands-free system for a cellular phone installed in a vehicle, comprising: a portable terminal (8); An interface 6 for exchanging data with the portable terminal and a hands-free circuit 4 connected to the portable terminal through the interface and the hands-free circuit and the interface are generated to generate an audio output level attenuation control signal during call origination and reception. The voltage stabilization circuit 2 and the noise filter 3 for stabilizing the voltage of the car audio volume control circuit 5 and the vehicle battery, removing power supply noise, and then applying an operating voltage to the hands-free circuit and the car audio volume control circuit. Hands free kit module (7) comprising; Vehicle audio volume for attenuating the voice output from the vehicle audio 9 transmitted to the vehicle speaker 11 by the generation of the output from the car audio volume control circuit of the hands-free module according to the call origination and call reception. Adjusting device (10); Audio output control device when using a mobile phone in the vehicle, characterized in that it comprises a.