KR100356742B1 - Car audio system - Google Patents

Abstract

The present invention relates to a car audio system, comprising a power on / off button (1), a volume control button (2), a display (3), an up / down button (4) for selecting audio data or an MP3 file, and selected audio. An operation and display device 10 composed of a play / stop button 5 and a changeover switch 6 for playing back or stopping data or MP3 files; A portable music player 20 for reproducing MP3 files or audio data; AUX terminal 31, which is an audio input terminal, a signal separation device 33 for separating digital and analog signals, a microprocessor 35 for inputting and outputting various control signals, and controlling various devices, and a predetermined ratio of analog signals. An audio device (30) comprising an audio IC (37) for amplifying and outputting the audio signal; It provides a car audio system including an output device 40 for outputting a signal transmitted from the audio IC 37 of the audio device 30 in the form of sound.

Description

Car audio system {CAR AUDIO SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car audio system, and more particularly, to a car audio system capable of connecting and using car audio installed in a vehicle with a portable playback device such as an MP3 player, walkman, and compact disc player (CDP).

In general, audio recording media for storing music include CDs (Compact Discs) and tapes, and portable devices for reproducing such audio recording media include MP3 players, walkmens, and compact disc players.

In the case of an MP3 player, a device that plays back MP3 files that have compressed and encoded music, and can play music at an audio compact disc (CD) level. In addition, MP3 files are stored and used in a compact disc (CD) or a memory card, and the user can select only the desired music and store it on a CD or a memory card, or download it through the Internet or communication, and then listen to the desired music. There is an advantage that it can.

However, in the case of a portable music player such as an MP3 player, there is an advantage that the user can listen to music conveniently when moving, but the problem is that the portable music player and the car audio installed in the vehicle cannot be connected when used in the vehicle. there was. In addition, even when a Walkman and a compact disc player are connected to a car audio system, only the AUX terminal outputs an audio signal, so there is a problem in that the status of these devices is not displayed or the devices cannot be controlled. .

Accordingly, an object of the present invention is to provide a car audio system that can be used by connecting car audio installed in a vehicle and a portable music player.

In addition, another object of the present invention is to provide a car audio system for displaying or controlling the state of the portable music player by separating the signal input from the portable music player connected to the car audio installed in the vehicle.

1 is a view schematically showing an operation and display device of the present invention;

2 is a schematic overall configuration diagram of the present invention;

3 is a view for explaining the present invention.

Referring to Figures 1 and 2 will be described in detail the configuration of the present invention.

As shown in Fig. 1 and Fig. 2, the present invention provides an up / down button for selecting a power on / off button (1), a volume control button (2), a display (3), audio data or an MP3 file in a car audio system. An operation and display device (10) comprising a down button (4), a play / stop button (5) and a changeover switch (6) for playing or stopping a selected audio data or MP3 file; A portable music player 20 for reproducing MP3 files or audio data; AUX terminal 31, which is an audio input terminal, a signal separation device 33 for separating digital and analog signals, a microprocessor 35 for inputting and outputting various control signals and controlling various devices, and an analog signal An audio device 30 comprising an audio IC 37 for amplifying and outputting at a ratio; And an output device 40 for outputting a signal transmitted from the audio IC 37 of the audio device 30 in a sound form.

The operation and display device 10 is installed in the center of the front of the vehicle, the on / off button (1) for controlling the power supply of about 12V, the volume control button (2) for adjusting the volume of the speaker, Display 3 for displaying various characters and graphics, Audio data displayed on display 3 or Up / Down button 4 for moving back and forth of MP3 file list to select MP3 file, and display on display 3 And a play / stop button 5 and a changeover switch 6 for playing or stopping the audio data or the MP3 file selected from the list of the audio data or the MP3 file.

In addition, the portable music player 20 is composed of an MP3 player for reproducing MP3 files or a walkman or compact disc player for reproducing audio data.

The audio device 30 also includes an AUX terminal 31 and an AUX terminal 31, which are input terminals of audio for receiving a signal output from a built-in music player or a portable music player 20 (not shown). A signal separator 33 for separating the signal transmitted from the digital signal into an analog signal, a microprocessor 35 for processing and controlling the digital signal output from the signal separator 33, and the signal separator 13 And an audio IC 37 for amplifying and outputting an analog signal outputted by a predetermined ratio.

The output device 40 is composed of a speaker SP for outputting a signal output from the audio IC 37 of the audio device 30 in the form of sound.

1 to 3 illustrate the operation of the present invention configured as described above.

First, in the operation and display device 10 provided in the front center of the vehicle, the user operates the on / off button 1 to supply power of about 12 V to each device, and to change over the switch ( 6), it is set whether to use the built-in music reproducing apparatus or the portable music reproducing apparatus 20 (step S1).

Next, when the user sets that the portable music player 20 is used in the manipulation and display device 10, the microprocessor 35 embedded in the audio device 30 is connected to the AUX terminal 31, which is an audio input terminal. In step S2, it is determined whether a signal is input (step S2).

As a result of the determination of step S2, if no signal is input from the portable music player 20 to the AUX terminal 31, the step S2 is executed again.

In addition, when a digital signal bias is input from the portable music player 20 to the AUX terminal 31 of the audio device 30, the input signal is transmitted to the signal separator 33 to be separated into a digital signal and an analog signal. (Step S2).

In step S2, the separated analog signal is transmitted to the audio IC 37, while the separated digital signal is transmitted to the microprocessor 35.

Next, the microprocessor 35 processes the input digital signal and displays information such as the status or title of the portable music player 30 on the display 3 of the operation unit 10. In addition, it is blocked from being input to the AUX terminal 31 in the built-in music playback apparatus (not shown).

In addition, the audio IC 37 amplifies the input analog signal at a predetermined rate and transmits it to the output device 40.

The output device 40 outputs a signal output from the audio IC 37 of the audio device 30 in the form of music through the speaker SP.

As described above, according to the present invention, there is an effect that the user can use the portable music player for listening to music conveniently when connected to an audio system installed in the vehicle. There is also an effect that portable music player such as walkman and compact disc player can be connected to the car audio system to display the status of these devices or to control them.

Claims (6)

In a car audio system, Power on / off button (1), volume control button (2), display (3), up / down button (4) for selecting audio data or MP3 file, and play to play or stop selected audio data or MP3 file An operation and display device 10 comprising a / stop button 5 and a changeover switch 6; A portable music player 20 for reproducing MP3 files or audio data; AUX terminal 31, which is an audio input terminal, a signal separator 33 for separating digital and analog signals, a microprocessor 35 for inputting and outputting various control signals and controlling various devices, and an analog signal An audio device 30 comprising an audio IC 37 for amplifying and outputting at a ratio; Car audio system comprising an output device (40) for outputting the signal transmitted from the audio IC (37) of the audio device (30) in the form of sound. The method of claim 1, The portable music player 20 is a car audio system, characterized in that consisting of an MP3 player for playing back MP3 files. The method of claim 1, The portable music player (20) is a car audio system, characterized in that composed of a walkman to reproduce the audio data. The method of claim 1, The portable music player (20) comprises a compact disc player for reproducing audio data. The method of claim 1, The audio device 30 is transmitted from the AUX terminal 31 and the AUX terminal 31, which is an input terminal of audio for receiving a signal output from the internal music player or the portable music player 20, not shown. A signal separation device 33 for separating the signal into a digital signal and an analog signal, a microprocessor 35 for processing and controlling the digital signal output from the signal separation device 33, and outputting from the signal separation device 13 A car audio system, comprising: an audio IC (37) for amplifying and outputting an analog signal at a predetermined ratio. The method of claim 1, The output device 40, the car audio system, characterized in that it comprises a speaker (SP) for outputting the amplified analog signal in the form of sound.