JPH097285A - In-vehicle disk exchange device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an in-vehicle disc exchange device that does not increase power consumption even when a plurality of types of discs can be reproduced. [Configuration] The control microcomputer 11 includes a master unit 20.
Is detected and the state of the vehicle-mounted disk exchange device 10 as the next state is determined. Based on the detection result and the determination result, the control microcomputer 11 determines the stabilized power supply circuit 12, the mechanical deck 13, the servo and common signal processing unit 14, the display output circuit 15, the video CD processing circuit 16, the CD-G processing circuit 17, and the audio. The on / off control of the switch circuits S1 to S6 provided between the switch circuit and the D / A circuit 18 is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted disc exchanging device in which a plurality of discs such as CDs (compact discs) are mounted and discs are selected and reproduced in accordance with instructions from an operator.

[0002]

2. Description of the Related Art A CD player is widely used as one component unit of an audio system for automobiles, which is commonly called a car audio system.

In view of the fact that it is problematic in terms of safety for the driver to exchange the discs while the automobile is driving, a plurality of discs are loaded in advance and the plurality of discs are loaded. Prepare an in-vehicle disc exchange device that selects and plays a disc according to the user's selection instruction from the operating panel surface or the transmitter of the remote control device (hereinafter referred to as the remote commander). ) Is also a prize system that allows you to automatically play multiple discs by simply performing the required key operation.

This system comprises a master unit having a remote control signal receiving portion from an operation panel surface or a remote commander, a vehicle-mounted disc exchange device called a CD changer, and a speaker as an audio monitor device.

In this system, the power supply voltage is supplied from the battery of the automobile to the vehicle-mounted disc exchange device. The battery of the automobile also supplies power supply voltage to each electric system of the automobile. For this reason, it is desirable that the battery consumes less power, and power saving is also desired for the vehicle-mounted disk exchange device.

The conventional on-vehicle disk exchange apparatus is designed to save power by assuming three states of the system and changing the power supply range according to each state as follows. There is.

That is, in the on-vehicle disc exchanging device, when the power of the master unit is off, the power of the master unit is on and the on-vehicle disc exchanging device is selected. If not, determine which state the master unit is in the power-on state, the in-vehicle disc exchange device is selected, and the disc is being played.

In the case of (1), the on-vehicle disc exchanging device is in an unused state, and no power is supplied to the on-vehicle disc exchanging device.

In the above case, the on-vehicle disc exchanging device is supplied with power to the mechanical deck portion for disc exchanging. However, no power is supplied to the signal processing circuit for reproducing the disc.

In the case of, the disc is being reproduced,
Power is supplied to all the circuits such as the signal system, the servo system, and the mechanical deck in order to put them into operation.

As described above, conventionally, the above-mentioned 3
Assuming two cases, power supply is controlled by controlling the supply of power to each part of the in-vehicle disk exchange device.

[0012]

By the way, in recent years, CD-G (CD graphics) other than music CD, video C
Discs, which also provide image information such as D and CD-ROM, are becoming popular.

Such discs have the same disc size, and the signal pickup portion by the optical pickup and the digital signal reproducing circuit portion can have the same constitution.

Therefore, as an in-vehicle disc exchange device,
It would be convenient if there were discs that can exchange and play different types of discs such as music CDs, CD-Gs, video CDs, and CD-ROMs. The function of the in-vehicle disc exchange device should be enhanced and the types of discs that can be played should be increased. It is possible.

In this case, if the number of reproducible discs is increased, a processing circuit corresponding to the type of disc to be replayed becomes necessary. For example, in order to make the CD-G reproducible, a CD-G decoder capable of extracting and decoding the graphics information recorded in the subcode of the disc is required. In order to make the video CD reproducible, a decoder for the video CD that expands and decodes the compressed and recorded data on the disc is required. Similarly, in order to make the CD-ROM reproducible, a decoder capable of supporting the data structure of the CD-ROM is required.

As described above, when the above-mentioned conventional power saving method is applied to the vehicle-mounted disc exchange apparatus capable of reproducing the music CD, CD-G, video CD, and CD-ROM, This leads to an increase in power consumption.

That is, according to the conventional method, when reproducing one disc of a plurality of discs,
Power is supplied to all the decoder circuits provided corresponding to each disk of the vehicle-mounted disk exchange device. In other words, power is supplied to decoders other than the disc that is being played, increasing power consumption,
It also puts a heavy load on the automobile battery.

In view of the above, the present invention makes it possible to save power without unnecessary power consumption, even if it is possible to reproduce a plurality of types of discs. The purpose is to provide a device.

[0019]

In order to solve the above-mentioned problems, a vehicle-mounted disc exchange apparatus according to the present invention receives a control signal from a master unit which receives a user's operation input, and exchanges a disc and reproduces from the disc. In an in-vehicle disc exchange device for performing the above, a mechanical operation unit including a disc exchange mechanism, a plurality of signal processing circuits provided corresponding to a plurality of types of reproducible discs,
A signal processing circuit common to the plurality of types of disks,
The control means includes switch means and control means provided respectively between the power supply terminal and the mechanical operation section, between each of the plurality of signal processing circuits, and between the common signal processing circuit. Has a detection means for detecting the on / off state of the master unit and a discrimination means for discriminating the state of the device itself as the next state. The detection result of the detection means and the discrimination of the discrimination means On / off of each of the switch means is controlled based on the result.

[0020]

In the vehicle-mounted disk exchanging device according to the present invention having the above-described structure, when it is detected that the master unit is off, each switch means is turned off and no power is supplied to each part.

If it is detected that the master unit is on and the next state of the on-vehicle disc exchanging device is a disc exchanging waiting state, the power supply terminal and mechanical The switch means provided between the switch and the operating part is turned on to turn on the power to the mechanical operating part, the other switch means is turned off, and the other parts are not turned on.

It is detected that the master unit is on, and the next state of the on-vehicle disc exchange device is
If it is determined that the disc is playing,
It is provided between the power supply terminal and the mechanical operation unit, among a plurality of types of reproducible discs, between a signal processing circuit provided corresponding to the disc to be reproduced, and between a common signal processing circuit. The power supply range is controlled so that the switch means is turned on and the other switch means are turned off.

In this way, the range of power supply is controlled based on the on / off state of the master unit and the state of the on-vehicle disc exchanging device which is its own device in the next state.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An on-vehicle disk exchanging device according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram for explaining an example of an in-vehicle system to which the in-vehicle disk exchange device of this example is applied.

The master unit 20 is connected to the vehicle-mounted disk exchange device 10 of this example by a bus line 50. The master unit 20 in this example is an audio device such as a cassette deck, a CD player, a mini disc player, or a composite device thereof.

Then, the master unit 20 receives a remote control signal from the remote commander 24, a light receiving section 22, a control microcomputer 21 for exchanging control commands with the on-vehicle disc exchanging device 10, and an LCD, for example. And a display device 23. The control microcomputer 21 generates a control command according to the received remote control signal, and transmits this control command to the vehicle-mounted disk exchange device 1
Send to 0. The vehicle-mounted disk exchange device 10 operates according to a control command from the master unit 20. It may also have an operation panel.

As shown in FIG. 1, the master unit 20
The vehicle-mounted disk exchange device 10 is supplied with a vehicle battery EB as a power source.
The bus line 50 shown in FIG. 1 includes not only a control command communication line, but also a power supply line 51 and a line 52 indicating a power-on / off state of the master unit 20.

Control microcomputer 21 of master unit 20
When the power of the master unit 20 is turned on, the line 52 rises from low level to high level, for example. The in-vehicle disk exchange device 10 detects that the power of the master unit 20 is turned on when the line 52 becomes high level.

In the case of this example, the vehicle-mounted disk exchange device 1
The control microcomputer 11 of 0 is in a so-called sleep mode state when the master unit 20 is powered off, and periodically searches the state of the line 52. Then, when it is detected that the line 52 becomes high level, the control microcomputer 11 of the in-vehicle disk exchange device 10 is released from the sleep mode.

After detecting the power-on of the master unit 20, the in-vehicle disk exchange device 10 monitors the control command from the master unit 20.

In the sleep mode, line 5
The control microcomputer 11 does not periodically monitor the state of No. 2, but when the state of the line 52 changes from a low level to a high level, a flip-flop circuit triggered by its rise is provided to the in-vehicle disk exchange device 10. Alternatively, the sleep mode may be released by the output of the flip-flop circuit.

The on-vehicle disc exchange apparatus 10 of this example is
C of different types such as music CD, CD-G, video CD
D can be played. Further, as will be described later, the in-vehicle disk exchange device 10 of this example has a function of supplying instruction contents of the master unit 20 and system status as image information to, for example, the display device 23 of the master unit 20 in this example ( Display output circuit 1 described later
It also has 5).

As shown in FIG. 1, a vehicle-mounted disk exchange apparatus 10 of this example includes a control microcomputer (hereinafter referred to as a control microcomputer) 11 for controlling the entire apparatus.
Stabilized power supply circuit 12, mechanical deck 13, servo and common signal processing unit 14, display output circuit 15
A video CD processing circuit 16 and a CD-G processing circuit 17
, Audio D / A circuit 18, and stabilized power supply circuit 12
Of the power supply voltage and switch circuits S1 to S6 provided between the respective parts.

The line 61 is a power supply line for supplying a stabilized power supply voltage. The line 71 supplies a control signal from the control microcomputer 11 to each part, and the switch circuit S
A control line for supplying the switching control signals of 1 to S6,
The line 72 is a line that supplies a control signal for controlling ON / OFF of the stabilized power supply circuit 12. Also, line 8
Reference numeral 1 is a data line for exchanging necessary data other than control commands between the control microcomputer 11 and each unit, and a line 82 is mainly a digital video signal.
Data lines supplied from the video CD processing circuit 16 and the CD-G processing circuit 17 to the display output circuit 15.

The stabilized power supply circuit 12 receives power supply voltage from the automobile battery EB through the power supply line 51 in the bus line 50. Then, a stabilized power supply voltage to be supplied to each part of the in-vehicle disk exchange device 10 is formed. The generated stabilized power supply voltage is supplied to the power supply line 61,
It is supplied to each part of the in-vehicle disk exchange device 10 via the switch circuits S1 to S6 provided corresponding to each part.

Further, the stabilized power supply circuit 12 constantly supplies a power supply voltage to the control microcomputer 11 through a line 62 so that the control microcomputer 11 is backed up by a so-called power supply.

The mechanical deck 13 performs mechanical operations such as disk loading, chucking, disk replacement, etc., and is drive-controlled by a control signal from the control microcomputer 11.

Although not shown, the servo / signal common processing section 14 includes a spindle motor for rotating the disk, a biaxial actuator for moving the optical pickup in the radial direction of the disk, and performs tracking servo, focus servo and spindle servo. In addition to having a servo circuit for performing the same, a circuit portion for performing common signal processing on the reproduced signal such as a reproduced RF signal processing circuit and an error correction decoding processing circuit is provided.

A servo control signal is supplied from the control microcomputer 11 to the servo and signal common processing section 14, and 9V for the motor and 5V for the power source for the signal processing circuit are supplied from the stabilizing power supply circuit 12. Supplied. Then, the servo and signal common processing unit 1
4, digital data (audio data or video data) is obtained, and the video CD processing circuit 16, depending on the type of disc reproduced by the digital data,
It is supplied to the CD-G processing circuit 17 and the audio D / A circuit 18.

The control microcomputer 11 receives the TOC (Table Of Table) of each disk from the servo and signal common processing section 14.
Contents) A memory (not shown) having a function of discriminating the type of each disc from the information and storing in advance the types of a plurality of discs loaded in the in-vehicle disc exchanging device 10.
It has. Then, while recognizing a plurality of loaded disks from the contents of this memory, processing such as disk selection according to the control command is performed, and in the case of a control command for a disk that does not exist, that processing is not performed. , Make a display that calls attention. This display signal is generated by the display output circuit 15 and sent to the master unit 20, and the corresponding display is performed on the display device 23 of the master unit 20.

The video CD processing circuit 16 is, for example, MP
A digital video signal from a compressed and recorded video CD is supplied using the compression method of EG1. Then, based on the control signal from the control microcomputer 11, the compressed video signal is expanded and the like to form an output video signal.

The CD-G processing circuit 17 includes the control microcomputer 1
On the basis of the control signal from No. 1, C recorded at a predetermined position among subcodes recorded on the CD-G disc.
Extract the DG graphic data, decode it,
An output signal for graphic display is formed in response to this.

The audio D / A circuit 18 converts the digital audio signal into an analog audio signal based on the control signal from the control microcomputer 11, and outputs an audio output signal. Although not shown, the output audio signal is supplied to a speaker via an audio amplifier and reproduced.

The display output circuit 15 converts the digital video signal supplied from the video CD processing circuit 16 or the CD-G processing circuit 17 into an analog video signal on the basis of the control signal from the control microcomputer 11. Then, the video output signal is output. The output video signal is supplied to the master unit 20 and also to a display monitor device (not shown), and an image based on the video output signal is displayed on the display monitor device.

Further, the display output circuit 15 is provided with a character generator and the like, and based on a control signal from the control microcomputer 11, the state of the master unit 20 and the vehicle-mounted disc exchange device 10, etc. as image information.
As described above, the output video signal for display on the display device such as the LCD 23 of the master unit 20 can also be formed and output. It should be noted that the display monitor device may be supplied and displayed.

When the master unit 20 is provided with a control command according to an operation input from the user via the remote commander 24, for example, the receiving unit 22 receives the control command and the control microcomputer 21 determines the control command. Then, the control command is generated. When the generated control command is to be transmitted to another, it is transferred via the bus line 50 to the vehicle-mounted disk exchange device 10, another source connected to the bus line, or another vehicle-mounted disk exchange device. .

Upon receiving the control command from the master unit 20, the control microcomputer 11 of the in-vehicle disk exchange device 10 turns on / off the master unit 20 and gives an instruction by the control command, as described in detail below. Power is supplied to each unit to be operated depending on the content and the state of the vehicle-mounted disc exchanging device 10, that is, the disc exchanging state or the disc reproducing state.

That is, the control microcomputer 11 first controls the power supply range by controlling the on / off states of the switch circuits S1 to S6 according to the circuit section to be operated.

Then, the circuit section to which the power is supplied operates and the control signal from the control microcomputer 11 becomes receivable, and the processing according to the control command from the master unit 20 is performed.

FIG. 2 is a diagram for explaining six states in which the power supply range is different in the in-vehicle disk exchange device 10 of this example. 3 to 8 are diagrams showing the respective parts in the power-on state in the states 1 to 6 shown in FIG.

As shown in FIG. 2, the power supply of the master unit 20 is in the off state in the case of the state 1, and the master unit 2 in the other states 2 to 6.
0 is in the on state.

Of the states 2 to 6, the state 2,
In the case of state 3, the in-vehicle disc exchange device 10 is in the non-reproduction state (a state in which the disc is not being reproduced), and in the other states 4 to 6, all are reproducing the disc. The type of disc being played is different. Hereinafter, the states 1 to 6 will be described in detail.

In the state 1, the vehicle-mounted disk exchange device 10
The master unit 20 is in a non-use state.
In the case of this state 1, the switch circuit S1 shown in FIG.
All the steps to S6 are turned off. Therefore,
As shown in FIG. 3, only the control microcomputer 11 receives the backup power from the battery of the automobile and waits for the supply of the control command from the master unit 20. Therefore, the state 1 is the in-vehicle disc exchange device 10
Power is not supplied to the respective parts, and the so-called sleep mode is set.

In the stabilized power supply circuit 12, only the voltage supply unit for backing up the control microcomputer 11 needs to be working, and for example, the 9V voltage supply unit for driving the motor is turned off.

In the state 2, the master unit 20 is a cassette deck, a CD player, or the master unit 2 other than the on-vehicle disc exchanging device 10.
When another on-vehicle disk exchanging device connected to 0 is selected, the in-vehicle disk exchanging device 10 is selected.
Is in the state of no selection.

In the case of this state 2, as shown in FIG. 2, only the switch circuit 6 shown in FIG. 1 is turned on, and power is supplied to the display output circuit 15. Therefore, as shown in FIG. 4, power is supplied to the display output circuit 15 so that the state of the vehicle-mounted disc exchange device 10 and the state of the master unit 20 can be notified by image information.

In the case of this state 2, the display output circuit 15 is controlled according to the control of the control microcomputer 11.
The in-vehicle disk exchange device forms image information for notifying that it is in the non-selection state and the audio device selected by the master unit 20, and displays it on the display device 23 of the master unit 20. To do.

In the state 3, the master unit 20 has selected the on-vehicle disc exchanging device 10, but in the on-vehicle disc exchanging device 10, the disc is not reproduced, and the user selects the disc. It is in a state of waiting for a reproduction instruction, that is, a so-called disk exchange and a reproduction waiting state.

In this state 3, as shown in FIG. 2, the switch circuits 1 and 6 shown in FIG. 1 are turned on, and as shown in FIG. 5, the mechanical deck 13 and the display output circuit 15 are powered. Supplied. This makes it possible to provide the user with the state of the vehicle-mounted disc exchange device 10 as image information, and to promptly process the disc exchange or reproduction instruction. It

The state 4 is the in-vehicle disc exchange apparatus 1
0, the CD-G disc is being played. As described above, the type of disk is determined by the control microcomputer 11 based on the TOC information of each disk from the servo / signal common processing unit 14.

In the case of this state 4, as shown in FIG. 2, the switch circuits S1, S2, S4 and S shown in FIG.
5, S6 are turned on, and the switch circuit S3 is turned off.

Therefore, as shown in FIG.
Mechanical deck 13 other than D processing circuit 16, servo and signal common processing unit 14, display output circuit 15, CD-
Power is supplied to the G processing circuit 17 and the audio D / A circuit 18.

As a result, each circuit other than the video CD processing circuit 16 operates. Then, the image information recorded on the CD-G disc is supplied from the servo and common signal processing unit 14 to the CD-G processing circuit 17 via the data line 81, and the graphics display image signal is formed here. . This signal is supplied to the display output circuit 15 via the data line 82, converted into an analog video signal, and reproduced.

Similarly, the audio information recorded on the CD-G is supplied from the servo and common signal processing section 14 to the audio D / A circuit via the data line 81, where it is converted into an analog audio signal and reproduced. To be done.

State 5 is the on-vehicle disc exchange apparatus 1
At 0, a video CD disc is being played. In this case, the CD-G processing circuit 1 shown in FIG.
7 is not used.

In the case of this state 5, as shown in FIG. 2, the switch circuits S1, S2, S3 and S shown in FIG.
5, S6 are turned on and the switch circuit S4 is turned off.

Therefore, in the case of the state 5, as shown in FIG. 7, the mechanical deck 1 other than the CD-G processing circuit 17 is
3, servo and signal common processing unit 14, display output circuit 15, video CD processing circuit 16, audio D /
Power is supplied to the A circuit 18.

As a result, the image information recorded on the video CD is supplied from the servo and signal common processing section 14 to the video CD processing circuit 16 via the data bus 81, and the image information compressed here is expanded. , A digital video signal is formed. The formed digital video signal is sent to the display output circuit 16 via the data bus 82.
, And converted into an analog video signal for reproduction.

The audio information recorded on the video CD is transferred from the servo / signal common section 14 to the data bus 81.
Is supplied to the audio D / A circuit 18 via the, and is converted into an analog audio signal and reproduced there.

State 6 is for the vehicle-mounted disc exchange device 1
0, a music CD or a CD-ROM other than the CD-G and the video CD is being reproduced. In this case, the video CD processing circuit 16 and the CD-G processing circuit 1
7 is not used.

That is, in the case of the state 6, as shown in FIG. 2, the switch circuits S1, S2, S5 shown in FIG.
S6 is turned on and the switch circuits S3 and S4 are turned off.

Therefore, in the case of this state 6, FIG.
Power is supplied to the mechanical deck 13, the servo / signal common processing unit 14, the display output circuit 15, and the audio D / A circuit 18 other than the video CD processing circuit 16 and the CD-G processing circuit 17, as shown in FIG.

As a result, the audio information recorded on the audio CD and the CD-ROM is transferred to the servo / signal common processing unit 14
From the audio D / A circuit 1 via the data bus 81
8 and the analog audio signal is formed and reproduced.

The in-vehicle disk exchange device 1 of this example
In the case of 0, when the disc to be reproduced is a CD-ROM, only the audio information is reproduced.

In the state 4, the state 5 and the state 6,
Since it is necessary to supply a voltage of + 9V to the motor, the stabilized power supply circuit 12 uses the line 72 from the control microcomputer 11.
The 9V power supply voltage supply unit is also turned on by the control signal through the.

In this way, the in-vehicle disc exchanging device 1 of this example has the functions increased and the number of reproducible discs has increased.
0, the control microcomputer 11 is the master unit 20
The state of (1) is monitored, and the range of power supply is controlled in accordance with the state of the self (vehicle-mounted disk exchange device 10) that should appear next by a control command from the master unit 20. As a result, in the in-vehicle disc exchange device 10 of this example, it is not necessary to supply power to circuits that do not need to be operated, and it is possible to reproduce a plurality of discs of different types with the minimum required power consumption.

Next, with reference to FIGS. 9 and 10, the control of the power supply range performed in the in-vehicle disk exchange device 10 of this example will be described. The processing shown in the flowcharts of FIGS. 9 and 10 is performed by the control microcomputer 11.

As described above, the in-vehicle disc exchange device 10 is configured so that the master unit 20 can be changed depending on the state of the line 52.
Detects the power on / off status of. Then, as described above, when it is detected that the master unit 20 is powered off, the sleep mode is set, and the switch circuits S1 to
S6 is all off.

When the power of the master unit 20 is turned on is detected by the state of the line 52 as described above, and the sleep mode is released, FIG. 9 and FIG.
The routine shown in is started.

That is, it waits for a control command from the master unit 20 (step 101).

When the arrival of the control command from the master unit 20 is detected, the control command is fetched (step 102) and it is judged whether or not it is for the own on-vehicle disk device 10 (step 10).
3).

When it is determined in step 103 that the disk exchanging device 10 is not selected, the control microcomputer 11 determines that the state is the state 2 shown in FIG. 2 and turns on the switch circuit S6. With
The other switch circuits S1 to S5 are controlled to be turned off (step 104).

When it is determined in step 103 that the disc exchanging device 10 is selected, the control microcomputer 11 fixes (chucks) the disc on the fixing table so that the disc can be reproduced.
It is judged whether or not it has been done (step 105).

When it is determined in step 105 that the disc is not chucked on the fixed table, the control microcomputer 11 determines that the state is the state 3 (disc selected) shown in FIG. While turning on the circuits S1 and S6, another switch circuit S
Control is performed so that 2, S3, S4, and S6 are turned off (step 106).

When it is judged in the judgment processing of step 105 that the disk is chucked on the fixed table, the TOC is read from the disk (step 107). From the contents of the TOC, the reproduced disc is an audio CD (OD in FIG. 10), a video CD (VD in FIG. 10), or a C that is neither of them.
It is determined whether the disc is a D-ROM disc (step 108).

Even if it is determined in step 108 that the disc is an audio CD or a video CD, there is a disc in which data is written in the CD-ROM format, and as will be described later. A distinction is made in the judgment steps 109 and 117.

If it is judged in the judgment processing of step 108 that the CD is an audio CD, it is judged whether or not it is truly an audio CD (step 109). If it is determined in step 109 that the disc is an audio CD, it is determined whether the disc is a CD-G disc (step 110).

In the judgment processing of step 110, the CD
When it is determined that the disc is not the −G disc, the disc is a CD-DA (music-only disc), and the control microcomputer 11 determines that the state is the state 6 shown in FIG. 2 (step 111). Then, the control microcomputer 11 turns on the switch circuits S1, S2, S5, S6 and turns off the switch circuits S3, S4 (step 112).

In the judgment processing of step 110, the CD
When it is determined that the disc is a −G disc, the disc is a CD-G disc, and the control microcomputer 11
Is determined to be in the state 5 shown in FIG. 2 (step 1
13). Then, the control microcomputer 11 uses the switch circuit S
1, S2, S3, S5 and S6 are turned on and the switch circuit S4 is turned off (step 114).

If it is determined in step 109 that the disc is not an audio disc,
The disc is a CD-ROM disc, and status 6
Is determined (step 115). Then, the control microcomputer 11 performs the switch control in the case of the state 6 shown in FIG. 2 (step 1) as in step 112 described above.
16).

Further, even when it is judged in the judgment processing in step 108 that the disc is a CD-ROM disc, the processing in steps 115 and 116 described above is performed. That is, the control microcomputer 11 performs the switch control in the state 6 shown in FIG.

If it is determined in step 108 that the disc is a video CD, it is determined whether the disc is a true video CD (step 117). If it is determined that the disc is not a video CD, it is determined that the disc is a CD-ROM disc and step 11
5, the process of step 116 is performed. That is, the control microcomputer 11 performs control in the case of state 6 shown in FIG.

When it is judged in the judgment processing of step 117 that it is a video CD, the control microcomputer 11 judges that it is in state 4 (step 118). And
The control microcomputer 11 includes switch circuits S1, S2, S4,
The switches S5 and S6 are turned on and the switch circuit S3 is turned off (step 119).

As described above, the control microcomputer 11 considers the on / off state of the master unit 20, the next state of the on-vehicle disc exchanging device 10, and the type of disc to be reproduced, and the power supply range. Is controlled to be appropriate.

As a result, it is possible to realize a vehicle-mounted disk exchanging device which operates with a minimum required power without supplying power to a circuit portion which does not need to operate.

In the case of this embodiment, for example, CD-
Since power is not supplied to the video CD processing circuit and the CD-G processing circuit at the time of reproducing an audio disk such as a DA, noise of the video system does not jump into the reproduced audio signal through the power supply line from these circuits. , Good playback sound can be obtained.

The on-vehicle disc exchanging device of this example uses the display output circuit 12 to indicate the state of the on-vehicle disc exchanging device or the state where the master unit selects another source or the on-vehicle disc exchanging device. Can be viewed through.

In the above example, the master unit and the vehicle-mounted disk exchange device are connected via the bus line, but it is also possible to perform command communication between the two by wireless communication.

The switch circuits S1 to S6 are provided not between one of the power supply terminals (power supply end) and each part as in the embodiment, but between the other of the power supply terminals (ground end) and each part. May be.

[0100]

As described above, according to the present invention, in a vehicle-mounted disc exchange apparatus capable of reproducing a plurality of types of discs of different types, power is not supplied to circuits which are not necessary for operation. Therefore, it is possible to reproduce a plurality of discs of different types with the minimum required power consumption.

Therefore, it is possible to provide a multi-functional vehicle-mounted disk exchange device with a small load on the battery of the automobile.

In the reproducing mode of the on-vehicle disc exchanging device, the power is supplied only to the necessary circuits corresponding to the type of the disc in the reproducing mode, so that power is supplied from other unnecessary circuits to the power supply line. A good reproduction signal can be obtained without the inclusion of noise.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an embodiment of an in-vehicle disk exchange device according to the present invention.

FIG. 2 is a diagram for explaining a state in which the power supply range is different in the embodiment of the in-vehicle disk exchange device according to the present invention.

FIG. 3 is a diagram for explaining a power supply range in the case of the state 1 shown in FIG. 2 in one embodiment of the vehicle-mounted disc exchange device according to the present invention.

FIG. 4 is a diagram for explaining a power supply range in the case of the state 2 shown in FIG. 2 in one embodiment of the in-vehicle disk exchange device according to the present invention.

FIG. 5 is a diagram for explaining a power supply range in the case of the state 3 shown in FIG. 2 in the embodiment of the on-vehicle disc exchanging device according to the present invention.

FIG. 6 is a diagram for explaining a power supply range in the case of the state 4 shown in FIG. 2 in the embodiment of the vehicle-mounted disc exchanging device according to the present invention.

FIG. 7 is a diagram for explaining a power supply range in the case of the state 5 shown in FIG. 2 in the embodiment of the in-vehicle disc exchange device according to the present invention.

FIG. 8 is a diagram for explaining a power supply range in the case of the state 6 shown in FIG. 2 in one embodiment of the on-vehicle disc exchange device according to the present invention.

FIG. 9 is a flow chart of power supply control to each part of one embodiment of the in-vehicle disk exchange device according to the present invention.

FIG. 10 is a flowchart following on from FIG.

[Explanation of symbols]

 10 In-vehicle disk exchange device 11 Control microcomputer 12 Stabilized power supply circuit 13 Mechanical deck 14 Servo and signal common processing part 15 Display output circuit 16 Video CD processing circuit 17 CD-G processing circuit 18 Audio D / A circuit S1 to S6 switch circuit 20 Master unit 21 Stabilized power supply circuit 22 Remote commander 50 Bus line 51 Power supply line 61 Power supply line 71,72 Control line 81,82 Data line

[Procedure amendment]

[Submission date] December 22, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0058

[Correction method] Change

[Correction contents]

In the state 3, the master unit 20 has selected the on-vehicle disc exchanging device 10, but in the on-vehicle disc exchanging device 10, the disc is not reproduced and the disc from the master unit 20 is not reproduced. Is waiting for the selection and the reproduction instruction, that is, the state of so-called disc exchange and reproduction waiting.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

When it is determined in step 105 that the disc is not chucked on the fixed table, the control microcomputer 11 determines that the state is the state 3 (disc selected) shown in FIG. While turning on the circuits S1 and S6, another switch circuit S
2, S3, S4, and controls to turn off S 5 (step 106).

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0089

[Correction method] Change

[Correction contents]

In the judgment processing of step 110, the CD
When it is determined that the disc is a −G disc, the disc is a CD-G disc, and the control microcomputer 11
Is in the state 4 shown in FIG. 2 (step 1
13). Then, the control microcomputer 11 uses the switch circuit S
1, S2, S 4, S5 , S6 turn on, turn off the switch circuit S 3 (step 114).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0093

[Correction method] Change

[Correction contents]

When it is judged in the judgment processing of step 117 that it is a video CD, the control microcomputer 11 judges that it is in state 5 (step 118). And
Control microcomputer 11, the switch circuits S1, S2, S 3,
S5, S6 turn on, turn off the switch circuit S 4 (step 119).

[Procedure Amendment 5]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure correction 6]

[Document name to be amended] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction contents]

[Figure 10]

Claims (2)

[Claims] 1. An in-vehicle disc exchanging device for exchanging a disc and reproducing from a disc in response to a control signal from a master unit which receives a user's operation input, wherein a mechanical operation section including a disc exchanging mechanism. A plurality of signal processing circuits provided corresponding to a plurality of types of reproducible discs, a signal processing circuit common to the plurality of types of discs, a plurality of signal processing circuits between the power supply terminal and the mechanical operation unit. Switch means and control means respectively provided between the signal processing circuit and the common signal processing circuit, and the control means detects the on / off state of the master unit. The detection result of the detection unit and the determination result of the determination unit. Zui, the vehicle disc changer being characterized in that so as to control each of the on-off of the switch means. 2. A determination means for determining whether or not the master unit is selecting its own device based on a control signal from the master unit is provided, and the control means is configured so that the master unit is turned on. Even if it is detected by the detection means that there is, if it is determined that the own device is not selected by the determination means,
2. The in-vehicle disk exchange device according to claim 1, wherein each of the switch means is controlled so as to be turned off.