KR200343665Y1 - Apparatus for Interface Between Car Audio and Potable Media Player - Google Patents

Abstract

The present invention relates to an interface device between a car audio device and a portable media player, wherein the car audio connection device outputs a voice signal reproduced by the portable media player through a car audio device. A media player connection terminal for connecting a control signal and a power supply transmitted from a portable audio player seated on the inner side of the portable media player, and displaying whether the portable media player is seated in the seating groove in luminous color. The first light emitting unit, the second light emitting unit for displaying the state of charge in the color of the battery embedded in the portable media player seated in the seating groove, the voice signal transmission from the portable media player connected through the seating groove to the car audio, car audio Car audio CDs for power and control signals Including a car audio system connection end for connecting to the changer is characterized in that the connection is configured.

Description

Interface device for car audio and portable media player {Apparatus for Interface Between Car Audio and Potable Media Player}

The present invention relates to a device for connecting a car audio and a portable media player, and more specifically, a portable media player (MP3, WMA, AAC, OGG, etc.) using a cradle for a vehicle mounted on a car audio The present invention relates to an interface device of a car audio and a portable media player connected to a CD (Compact Disk) changer player for listening.

In general, a vehicle is equipped with an audio system capable of reproducing audio signals stored in a recording medium such as a cassette tape or a compact disc, or listening to a radio with a built-in tuner.

In recent years, portable MP3 players have become available which can store a lot of songs and can delete, record and play data without further degrading the sound quality. MP3 Player (hereinafter abbreviated as 'MP3 Player') compresses and saves audio data according to the 'MPEG Layer3' format. It compresses and stores much more audio data than a normal CD player. During playback, it is decompressed and then converted to an analog signal and output through the earphone.

The prior art for using such an MP3 player for car audio of a vehicle is disclosed in Korean Patent Registration No. 20-0208857 (Car Audio System with MP3 Player).

1 is a block diagram of an audio system for a vehicle having an MP3 player according to the prior art, which is detachably mounted to a system main body 10 and a system main body 10 installed at one side of a driver's seat of a vehicle, and is portable. The MP3 player 30 (hereinafter, abbreviated as 'MP3 player') is provided.

The system main body 10 is formed in a box, and one side of the front side 11 is a radio button for outputting a radio signal received through an antenna (not shown) installed in a vehicle as a selection button for selecting a broadcast channel. 14, a display unit 12 on which the selected broadcast channel and operation state are displayed, a volume control button 13, and the like.

In addition, a rectangular recess 20 is recessed on the other side of the front surface 11 of the system main body 10 so that the MP3 player 30 is seated. This recess 20 is provided in the same size as the MP3 player 30, and the bottom part 21 is arrange | positioned with the 1st connector 22 electrically connected with the MP3 player 30. As shown in FIG. The first connector 22 is connected to a circuit board (not shown) for controlling the vehicle audio system, so that music stored in the MP3 player 30 can be output through the vehicle speaker (not shown).

To this end, a second connector 31 connected to the first connector 22 is also provided on the rear surface of the MP3 player 30. Accordingly, when the MP3 player 30 is seated in the recess 20, the first connector 22 and the second connector 31 are electrically connected to each other, thereby providing the front surface 11 of the system main body 10. The control means 13, 14 can control the MP3 player 30.

However, the vehicle audio system having an MP3 player according to the related art has to be exactly matched to the MP3 player seating groove provided in the front of the vehicle audio system and the MP3 player. MP3 player connection system has a problem in compatibility that can not be applied due to different protocols for each manufacturer.

The present invention is to solve the above-mentioned problems of the prior art, the purpose is to control the portable media player through the control panel of the car audio, connect the cradle to the CD changer input terminal of the car audio, seated on the cradle The present invention provides an interface device for a car audio and a portable media player for interfacing to play music of a portable media player.

1 is a block diagram of a vehicle audio system having an MP3 player according to the prior art,

2 is an external configuration diagram of an interface device between a car audio and a portable media player according to an embodiment of the present invention,

3 and 4 are system block diagrams of the interface device between the car audio and the portable media player according to an embodiment of the present invention,

5 is an operation flowchart of an interface device between a car audio and a portable media player according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

101: portable media player 110: car audio

120: interface device 121: car audio connection terminal

122: seating groove 123: media player connection terminal

124 and 125: first and second light emitting units

126, 128: first and second interface unit

127: microprocessor 129: charging unit

In order to achieve the object of the present invention, an interface device of a car audio and a portable media player according to the present invention is a car audio connection device for outputting a voice signal reproduced from a portable media player through a car audio, and seating the portable media player. A car audio connection terminal for transmitting a voice signal reproduced from the portable media player seated on one side of the inner groove and a control data transmitted from a car audio side and a power supply; A first light emitting unit for displaying whether the media player is seated in a light emitting color, a second light emitting unit for displaying a charging state in light emitting color in a battery built in the portable media player seated in the seating groove, and a portable device connected through the seating groove Audio signal transmission from media player to car audio, car audio For the control signal and power supply from the further characterized in that the car is configured to include a car audio connection end for connecting to an audio CD changer connected stages.

In order to achieve an object of the present invention, the interface system of a car audio and a portable media player is a car audio connection device for outputting a voice signal reproduced from a portable media player through a car audio. A first audio interface for inputting power and matching and matching the audio signal transmitted from the portable media player to the car audio and the control signal level output from the car audio connection; A microprocessor for performing bidirectional communication of control data by matching protocols of control signals input and output to the first interface unit and controlling power according to a battery charging state of a portable media player, and a control signal and a portable media output from the microprocessor. A second interface unit for matching the control signal level from the layer, and a control signal output from the second interface unit to the portable media player, the battery charging power supply, and a voice signal reproduced from the portable media player And a media player connection terminal for transmitting the power to the car audio connection terminal, and stepping down the power level supplied through the car audio connection terminal and supplying the power to the battery embedded in the portable media player through the media player connection terminal as charging power. And a charging unit configured to supply power to a driving power of the microprocessor and control power to the battery according to a charge control signal of the microprocessor.

2 is an external configuration diagram of an interface device between a car audio and a portable media player according to an embodiment of the present invention. The portable media player (MP3, WMA, AAC, OGG, etc.) 101 and the portable media player 101 are shown in FIG. The audio signal reproduced by the audio signal to the speaker of the vehicle, and controls and supplies the power to the portable media player 101, the car audio 101 and the portable media player 101 Interface with a control signal, and transmits a voice signal, and using the power supplied from the car audio 101 is composed of a cradle-shaped interface device 120 for charging the battery built in the portable media player 101 do.

Here, the interface device 120 includes a seating groove 122 for seating and fixing the portable media player 101 and a voice signal reproduced by the portable media player 101 seated on one side of the inner groove 122. Car audio connection terminal 121 for connecting the control data and the power supply transmitted from the transmission and the car audio 110 side of the first, and the seating groove 122 to display whether the mounting of the portable media player in the light emitting color A light emitting unit 124, a second light emitting unit 125 for displaying the state of charge (not shown in the drawing) on the battery embedded in the portable media player seated in the seating groove 122 in the light emitting color, and the seating groove A car that connects to the CD changer connection terminal of the car audio 110 for transmitting a voice signal to the car audio 110, a control signal from the car audio, and power supply from the portable media player 101 connected through the 122. To audio connection terminal 121 It is sex.

4 is a block diagram of an interface device of a car audio and a portable media player according to an embodiment of the present invention, and inputs a control signal and a supply power transmitted from the car audio 110 and the portable media player 101. A car audio connection terminal 121 for transmitting a voice signal transmitted from the car audio to the car audio, a first interface unit 121 for matching and interfacing a control signal level output from the car audio connection terminal 121, and A microprocessor 127 for performing bidirectional communication of control data by matching protocols of control signals input and output to the first interface unit 121 and controlling power according to a state of charge of the battery of the portable media player 101; A second interface for matching the control signal output from the processor 127 with the control signal level from the portable media player 101. And a control signal output from the second interface unit 128 to the portable media player 101, the battery charging power is supplied, and the audio signal reproduced from the portable media player 101. The media player connection terminal 123 for transmitting the power to the car audio connection terminal 121 and the power supply level supplied through the car audio connection terminal 121 to step down the media player connection terminal 123 with charging power. A charging unit for supplying to the battery embedded in the portable media player 101, the power supply to the driving power of the microprocessor 127, and controls the power to the battery in accordance with the charge control signal of the microprocessor 127 It consists of 129.

When described in more detail with reference to Figures 2 to 5 attached to the operation according to the embodiment of the present invention is configured as follows.

First, the present invention connects the interface device to the CD changer connection end of the car audio, and then mounts the portable media player to the interface device. When the CD changer operation key of the car audio is turned on, the portable media player mounted on the interface device operates. do.

2 is an external configuration diagram of an interface device of a car audio and a portable media player according to an embodiment of the present invention, and as shown therein, a car audio unit is connected to a CD changer of a car audio 110 mounted on the front of a driver's seat of a vehicle. The connection end 121 is connected.

The car audio connection end 121 is formed to be easily detachable in the shape of a din jack (Din Jack), the seating groove 122 of the interface device 120 is mounted on the portable media player 101 and is separated even when driving a vehicle. Not to be formed.

On the bottom side of the mounting groove 122, the portable media player 101 is electrically contacted with each other when the portable media player 101 is seated in the form of a contact pin exposed to correspond to a power supply terminal, a control terminal, or a voice signal output terminal of the portable media player 101. Do it.

In addition, the first light emitting unit 124 provided on one side of the front surface of the interface device 120 displays whether the portable media player 101 is mounted in the light emitting color.

The second light emitting unit 125 displays a heavy or full charge state of the battery built in the portable media player 101.

3 is a schematic block diagram of an interface device of a car audio and a portable media player according to an embodiment of the present invention, and FIG. 4 is a block diagram of an entire system of an interface system of a car audio and a portable media player according to an embodiment of the present invention. It is also.

As shown in the drawing, when the CD changer driving key provided on the front panel of the car audio 110 is turned on while the portable media player 101 is mounted on the interface device 120, the portable media player 101 is turned on. It is driven by the CD changer control communication protocol so that the remote control at 110.

The first command signal is connected to the data bus DATA BUS 1 through the car audio connection terminal 121 by a driving key (song selection, playback, stop, pause, recording, etc.) selected by the car audio 110. Is transmitted to the interface unit 126.

The first interface unit 126 adjusts the level of the CD changer protocol communication signal transmitted through the car audio connection terminal 121 and outputs the data to the data bus DATA BUS 2.

The microprocessor 127 converts the data format of the CD changer communication protocol transmitted through the data bus DATA BUS 2 into an operation control command signal of the portable media player 101 to the data line BUS 3. Output

The second interface 128 converts the signal level output through the DATA BUS 3 line into the control signal level of the portable media player 101 to convert the portable media player (123) through the media player connection terminal 123. 101).

On the contrary, the status response signal of the portable media player 101 (playback song number, song playback end, portable media player operation status signal, etc.) is transmitted to the second interface unit 128 through the media player connection terminal 123 to provide a signal level. Converts the data into the microprocessor 127 operating level and outputs the converted data to the CD changer communication protocol data and outputs the data to the first interface unit 126 through the data bus DATA BUS 2. .

The first interface unit 126 converts the signal level output from the microprocessor 127 into a car audio operation signal level and outputs it to the car audio 110 through the car audio connection terminal 121.

The operation state signal of the portable media player 101 input to the car audio 110 is displayed on the car audio display window.

The audio signal reproduced according to the normal operation of the portable media player 101 is received by the media player connection terminal 123 and is connected to the car audio connection terminal along the signal lines AUDIO-R, AUDIO-L, and AUDIO-GND. 121 is transmitted to the car audio 110 to listen to the voice signal through the speaker of the vehicle.

In addition, when recording the audio signal output from the car audio 110 to the portable media player 101, by selecting the recording mode, the audio signal output from the car audio 110 to the car audio connection terminal 121 The media player is transferred to the portable media player 101 through the media player connection 123 and recorded.

Meanwhile, the power supplied from the car audio 110 through the car audio connection terminal 121 is converted into a charging voltage by the charging unit 129 to embed the portable media player 101 through the media player connection terminal 123. Charge the battery.

At this time, the charging unit 129 supplies the driving voltage of the microprocessor 127 and controls the charging voltage supply under the control of the microprocessor 127.

5 is an operation flowchart of a connection device between a car audio device and a portable media player according to an embodiment of the present invention, wherein the car audio connection terminal 121 of the interface device 120 is connected to the CD changer connection unit of the car audio and is seated. In the state where the portable media player 101 is seated in the groove 122, the CD changer selection key of the car audio 110 is input, and the interface device 120 and the portable media player 101 are supplied with an initial state. (S102) (S104)

The initialization initializes the communication, system, microprocessor, etc. of the interface device 120 and checks the battery of the portable media player 101.

As described above, the interface device 120 waits for a command after initialization and checks whether the portable media player 101 is normally connected when the user inputs a CD changer play command through the car audio 110. (S108) (S110)

If the portable media player 101 is not present or the seating groove 122 is unstable, the portable media player 101 is transmitted to the car audio 110 to notify the user through the car audio 110 display unit (S114).

If the portable media player 101 is normally connected, the command from the car audio 110 is transmitted to the portable media player 101. (S112) (S116)

If the portable media player 101 does not operate normally, the portable media player 101 transmits a processing signal according to the abnormal operation to the car audio 110 to notify the user.

When the portable media player 101 operates normally, the operation state (play, stop, song number, etc.) data according to the normal operation is transmitted to be displayed through the display unit of the car audio 110 (S118).

Although the preferred embodiment according to the present invention has been described above, it is possible to transform the street lamp pole protection band into various shapes such as octagonal or circular according to the shape of the street lamp pole 10, and a person having ordinary knowledge in the art It is understood that various modifications and variations can be made without departing from the scope of the utility model registration of the invention.

As described above, the interface device between the car audio and the portable media player according to the present invention converts the CD changer control protocol of various car audio into the motion control protocol of the portable media player, thereby enabling communication with any car audio. Since the interface device is connected to the CD changer connection terminal without external modification to the car audio of the vehicle, the portable media player can be operated by the CD changer operation command, so the portable media player can be conveniently played in the vehicle. The car audio power is used to charge the built-in battery of the portable media player, so there is no need to provide a separate charging device. In addition, any type of portable media player can be attached to or detached from the seating groove, and the connection terminal can be used in a vehicle.

Claims (8)

In a car audio connection device for outputting a voice signal reproduced by a portable media player through a car audio, A seating groove for seating and fixing the portable media player; A media player connection stage for transmitting a voice signal reproduced from the portable media player seated on one side of the inner groove and connecting control data and a power supply transmitted from a car audio side; And And a car audio connection terminal connected to the CD changer connection terminal of the car audio for transmitting a voice signal to the car audio, a control signal from the car audio, and power supply from the portable media player connected through the seating groove. Car audio and portable media player interface device. The method of claim 1, A first light emitting unit which displays whether the portable media player is seated in the seating groove in a light emitting color; And And a second light emitting unit configured to display a state of charge in a light emitting color on a battery embedded in the portable media player seated in the seating groove. The method of claim 1, The media player connection terminal may include a voice signal connection pin connected to a voice signal output terminal of the portable media player and inputting a voice signal output from the portable media player; A control signal connection pin for interfacing control data between the car audio and the portable media player; And A power supply pin connected to a power terminal of the portable media player to supply power supplied from the car audio to a driving power and a charging power of the portable media player, wherein the interface between the car audio and the portable media player is included. Device. The method of claim 1, The car audio connection terminal is a car audio and a portable media player interface device, characterized in that formed with a din jack (Din Jack) detachably connected to the CD changer connection terminal. In a car audio connection device for outputting a voice signal reproduced by a portable media player through a car audio, A car audio connection terminal for inputting a control signal and a supply power transmitted from the car audio and transmitting a voice signal transmitted from the portable media player to the car audio; A first interface unit for matching and interfacing control signal levels output from the car audio connection terminal; A microprocessor for matching a protocol of a control signal input and output to the first interface unit to perform bidirectional communication of control data and controlling power according to a battery charging state of a portable media player; A second interface unit matching a control signal level output from the microprocessor with a control signal level from a portable media player; A media player connection stage for transmitting the control signal output from the second interface unit to the portable media player, supplying the battery charging power, and transmitting the audio signal reproduced from the portable media player to the car audio connection terminal; And The power supply level supplied through the car audio connection step is stepped down to supply power to the battery embedded in the portable media player through the media player connection step as the charging power and to supply power to the battery according to the charge control signal of the microprocessor. Car audio and the interface device of the portable media player, characterized in that it comprises a charging section for controlling. The method of claim 5, wherein The control signal transmitted from the car audio to the portable media player through the car audio connection terminal, the first interface, the microprocessor, the second interface unit, and the media player connection terminal is played, stopped, paused or recorded selected from the car audio operation panel. And an operation command data of a portable media player including music selection data. The method of claim 5, wherein The control signal output from the portable media player and transmitted to the car audio through the media player connection terminal, the second interface unit, the microprocessor, the first interface unit, and the car audio connection terminal is normal operation of the portable media player, and playback of songs. An interface device of a car audio and a portable media player, characterized by consisting of operating state data of the portable media player including termination. The method of claim 5, wherein The microprocessor converts communication protocols of various CD changer players by various manufacturers into protocols for controlling a portable media player, and converts a control signal protocol from the portable media player into a communication protocol of the CD changer player. Car audio and portable media player interface device.