JP2002124014A - Integrated circuit for optical disk unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an integrated circuit for optical disk unit which can reduce power consumption. SOLUTION: The integrated circuit for optical disk unit which makes record or reproduce information with respect to two or more kinds of optical disks is provided with circuits which make record or reproduce information for each kind of two or more kinds with respect to the optical disks, and power down control circuits which reduce independently the electric power of the circuits which make record or reproduce information with respect to two or more kinds of optical disks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated circuit for an optical disk device for recording or reproducing information on or from a plurality of types of optical disks capable of reducing power consumption.

[0002]

2. Description of the Related Art Today, optical disk devices for recording or reproducing information on optical disks such as CDs and DVDs are used.

[0003] In such a conventional optical disk apparatus, since an information recording format is different between a CD and a DVD, an analog signal processing circuit for processing signals, a digital signal processing circuit, and an LD drive circuit are used for a CD and a DVD. Are provided for signal processing.

[0004]

In the above-described conventional optical disk apparatus, two systems of signal processing circuits for CD and DVD are provided, so that the configuration becomes complicated and the apparatus cannot be miniaturized. Since the power is constantly supplied to the signal processing circuit of the system and is in an operating state, the power consumption is large.

It is an object of the present invention to provide an integrated circuit for an optical disk device capable of reducing power consumption.

[0006]

According to the first aspect of the present invention, there is provided an integrated circuit for an optical disk device for recording or reproducing information on or from a plurality of types of optical disks,
Power down control for reducing the power of a circuit for recording or reproducing information on or from an optical disc for each of the plurality of types and a circuit for recording or reproducing information on or from the plurality of types of optical discs independently And a circuit.

According to a second aspect of the present invention, there is provided an integrated circuit for an optical disk device for recording or reproducing information on or from a plurality of types of optical disks, and recording information on an optical disk for each of the plurality of types. Alternatively, a circuit for driving an LD for performing reproduction, and a circuit for driving an LD for performing recording or reproduction of information on the plurality of types of optical discs may include a power-down control circuit for independently reducing power. , Is provided.

According to a third aspect of the present invention, there is provided an integrated circuit for an optical disk apparatus for recording or reproducing information on or from a plurality of types of optical disks, wherein the information is recorded on an optical disk for each of the plurality of types. Alternatively, a circuit for performing analog signal processing for performing reproduction and a circuit for performing analog signal processing for performing recording or reproduction of information on or from the plurality of types of optical discs are each independently controlled to reduce power. And a circuit.

According to a fourth aspect of the present invention, there is provided an integrated circuit for an optical disk device for recording or reproducing information on or from a plurality of types of optical disks, and recording information on an optical disk for each of the plurality of types. Alternatively, a circuit for performing digital signal processing for performing reproduction and a circuit for performing digital signal processing for performing recording or reproduction of information on or from the plurality of types of optical discs are each independently controlled to reduce power. And a circuit.

According to the fifth aspect of the present invention, the power-down control circuit reduces the frequency of the clock of the circuit that performs the signal processing to power down. In the invention according to claim 6, the power-down control circuit stops the frequency of the clock of the circuit that performs the signal processing and performs power-down.

[0011] In the invention of claim 7, the power down control circuit turns off a power supply of a circuit for performing signal processing to power down. In the invention of claim 8, the power down control circuit reduces the frequency of the clock of the circuit that performs the signal processing, stops the clock, and turns off the power, or any two of these means or any one of them. Power down.

In a ninth aspect of the present invention, a register is provided, and a circuit for performing power-down according to data held in the register and a method for performing power-down can be selected.

[0013]

1 to 4 show an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a configuration diagram of an optical disk device on which the integrated circuit of the present invention is mounted, FIG. 2 is a configuration diagram of a digital signal processing integrated circuit of the present invention, FIG. 3 is a configuration diagram of an analog signal processing integrated circuit of the present invention, FIG. 4 is a configuration diagram of the LD driving integrated circuit of the present invention.

In FIG. 1, reference numeral 100 denotes an optical disk device,
101 is a pickup, 102 is a control unit, 103 is a disc discrimination unit, 104 is an analog signal processing integrated circuit,
Reference numeral 05 denotes a digital signal processing integrated circuit.

The pickup 101 includes an LD driving integrated circuit 106, a CD laser diode (CDLD) 107, a CD light receiving element (CDPD) 108, and a DVD laser diode (D
VDDL) 109, light receiving element for DVD (DVDPD)
110, a power monitoring light receiving element (PD) 111 commonly used for CD and DVD is mounted.

As shown in FIG. 2, the digital signal processing integrated circuit 105 includes a digital signal processing circuit 201 for DVD, a digital signal processing circuit 202 for CD,
It comprises a CD common circuit 203, a power-down control circuit 204, and a power-down mode setting register 205, which are composed of an integrated circuit integrated into one chip.

The digital signal processing circuit 201 for DVD is a digital signal processing circuit required only when recording or reproducing information on a DVD optical disk, and is unnecessary when recording or reproducing information on a CD optical disk.

The CD-only digital signal processing circuit 202 is C
A digital signal processing circuit required only when recording or reproducing information on a D optical disk, and is unnecessary when recording or reproducing information on a DVD optical disk. The DVD / CD common circuit 203 is a signal processing circuit necessary for recording and reproducing information on DVD and CD optical disks.

The power-down control circuit 204 is a control circuit for reducing the power consumption of the DVD-dedicated digital signal processing circuit 201, the CD-dedicated digital signal processing circuit 202, and the DVD / CD common circuit 203. Power down.

As a power-down method, the power supplied to the circuit is turned off, the clock supplied to the circuit is stopped, and the frequency of the clock supplied to the circuit is reduced to reduce the power consumption. Let it.

The power down mode setting register 20
Reference numeral 5 denotes a register for setting a power down mode. The power down control circuit 204 powers down the digital signal processing circuit 201 for DVD, the digital signal processing circuit 202 for CD, and the DVD / CD common circuit 203 in accordance with the set value.

That is, for example, the power down mode setting register 205 is composed of 4 bits, and the power is reduced according to the value set in the register as shown in FIG. That is, as shown in FIG.
When 01 is set, the power supply to all of the DVD dedicated digital signal processing circuit 201, the CD dedicated digital signal processing circuit 202, and the DVD / CD common circuit 203 is turned off. When 1010 is set, the DVD dedicated digital signal processing circuit 201 and the DVD / CD common circuit 203 operate normally, and the power to the CD dedicated digital signal processing circuit 202 is turned off.

In this embodiment, the power consumption is reduced by three means of turning off the power, stopping the supply of the clock, and reducing the frequency of the clock. The power consumption may be reduced by one or two means or one of the means.

The analog signal processing integrated circuit 104
3, a DVD-only analog signal processing circuit 301, a CD-only analog signal processing circuit 302,
DVD / CD common circuit 303, power down control circuit 3
04 and a power-down mode setting register 305. These are configured by an integrated circuit integrated into one chip.

The DVD-only analog signal processing circuit 301 is an analog signal processing circuit required only when recording or reproducing information on a DVD optical disk, and is unnecessary when recording or reproducing information on a CD optical disk.

The analog signal processing circuit 302 for CD
An analog signal processing circuit required only when recording or reproducing information on a D optical disk, and is an unnecessary circuit when recording or reproducing information on a DVD optical disk.
The DVD / CD common circuit 303 is a signal processing circuit necessary for recording and reproducing information on DVD and CD optical disks.

The power down control circuit 304 and the power down mode setting register 305 of the digital signal processing integrated circuit 105 described with reference to FIG.
Similarly to the above, the power-down control circuit 304 determines the DV based on the value set in the power-down mode setting register 305.
D-dedicated analog signal processing circuit 301, CD-dedicated analog signal processing circuit 302, and DVD / CD common circuit 303
To power down.

As shown in FIG. 4, the LD driving integrated circuit 106 includes a DVD-only LD driving circuit 401 and a CD driving circuit.
Dedicated LD drive circuit 402, DVD / CD common circuit 40
3, a power-down control circuit 404 and a power-down mode setting register 405, each of which is constituted by an integrated circuit integrated into one chip. These are the same as those described for the digital signal processing integrated circuit 105 of FIG. Operate.

In this embodiment, the integrated circuit for digital signal processing 105, the integrated circuit for analog signal processing 104 and L
Although the three integrated circuits of the D driving integrated circuit 106 are separated, these three integrated circuits may be integrated into one chip, or any two integrated circuits may be integrated into one chip.

The above-described analog signal processing integrated circuit 104, digital signal processing integrated circuit 105, and LD
The power down of the driving integrated circuit 106 is performed by a command from the control unit 102 shown in FIG.

That is, when the discrimination unit 103 determines that the optical disk is not placed on the turntable, the control unit 102 sets the analog signal processing integrated circuit 10
4. Power down mode setting register 3 of digital signal processing integrated circuit 105 and LD driving integrated circuit 106
05, 205 and 405, for example, the signal 000
1 and the power supply to all the processing circuits is turned off to reduce the power consumption as described with reference to FIG.

If the disc discriminating unit 103 determines that a CD optical disc is loaded, the control unit 102
For example, a signal 0111 is transmitted to turn off the power of the DVD system and to supply power or stop the clock to the CD system and the DVD / CD common system to reduce the power consumption.

At the time of recording or reproducing information on or from a CD optical disc, the control unit 102
To turn off the power of the DVD system and supply power to the CD system and the DVD / CD common system to release the stop of the clock so that the normal operation is performed.

The control unit 102 is in a standby state in recording or reproducing information on or from a CD optical disk.
For example, a signal 1000 is transmitted to turn off the power of the DVD system, and to supply the power to the CD system and the DVD / CD common system and to reduce the clock frequency to reduce the power consumption.

Also, when a DVD optical disc is placed on a turntable, a signal is transmitted in the same manner as for a CD optical disc to reduce power consumption. The reduction in power consumption is greatest when the power is turned off, and the reduction effect decreases as the supply clock stops and the frequency of the supply clock decreases.

When the power is turned off, the recovery time until the normal operation can be started becomes long, and the power down method may be selected according to the purpose of use.

[0037]

As described above, a circuit for recording or reproducing information on or from an optical disk for each of a plurality of types, and a recording or reproduction of information on or from an optical disk for each of a plurality of types. Since the power-down control circuit for reducing the power independently of each circuit and the integrated circuit integrated into one chip, the integrated circuit for an optical disk device which is small and can reduce power consumption can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an optical disk device on which an integrated circuit of the present invention is mounted.

FIG. 2 is a configuration diagram of a digital signal processing integrated circuit of the present invention.

FIG. 3 is a configuration diagram of an analog signal processing integrated circuit of the present invention.

FIG. 4 is a configuration diagram of an LD driving integrated circuit of the present invention.

FIG. 5 is a diagram illustrating an example of a power down mode and a power down operation of a signal processing circuit.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 optical disk device 101 pickup 102 control unit 103 disk determination unit 104 analog signal processing integrated circuit 105 digital signal processing integrated circuit 106 LD driving integrated circuit 107 CD laser diode (C
DLD) 108 Light receiving element for CD (CDP
D) 109 Laser Diode for DVD (DVDLD) 110 Photodetector for DVD (DVDLD)
PD) 111 Photodetector (PD) for power monitor 201 Digital signal processing circuit for DVD 202 Digital signal processing circuit for CD 203, 303, 403 DVD / CD common circuit 204, 304, 404 Power down control circuit 205, 305, 405 Power down mode setting register

Claims (9)

[Claims] 1. An integrated circuit for an optical disc device for recording or reproducing information on or from a plurality of types of optical discs, the circuit for recording or reproducing information on or from an optical disc for each of the plurality of types. An integrated circuit for an optical disk device, comprising: a power down control circuit for independently reducing power of a circuit for recording or reproducing information on or from the plurality of types of optical disks. 2. An integrated circuit for an optical disc device for recording or reproducing information on or from a plurality of types of optical discs, for recording or reproducing information on or from an optical disc for each of the plurality of types. And a power-down control circuit that independently reduces the power of a circuit that drives the LD for recording or reproducing information on or from the plurality of types of optical discs. An integrated circuit for an optical disk device. 3. An integrated circuit for an optical disk device for recording or reproducing information on or from a plurality of types of optical discs, for recording or reproducing information on or from an optical disk for each of the plurality of types. A circuit for performing analog signal processing, and a power-down control circuit for independently reducing the power of a circuit for performing analog signal processing for recording or reproducing information on or from the plurality of types of optical discs. An integrated circuit for an optical disk device, characterized in that: 4. An integrated circuit for an optical disc device for recording or reproducing information on or from a plurality of types of optical discs, for recording or reproducing information on or from an optical disc for each of the plurality of types. A circuit for performing digital signal processing, and a power-down control circuit for independently reducing the power of a circuit for performing digital signal processing for recording or reproducing information on or from the plurality of types of optical discs. An integrated circuit for an optical disk device, characterized in that: 5. The integrated circuit for an optical disk device according to claim 1, wherein said power-down control circuit reduces the frequency of a clock of a circuit for performing signal processing to power down. circuit. 6. The optical disk device integrated circuit according to claim 1, wherein said power down control circuit stops the clock frequency of a circuit for performing signal processing to power down. circuit. 7. The integrated circuit for an optical disk device according to claim 1, wherein said power down control circuit turns off a power supply of a circuit for performing signal processing to power down the circuit. 8. The power down control circuit reduces the frequency of the clock of a circuit that performs signal processing, and stops the clock and turns off the power by three means, or any two means or any one of these means. 5. The method according to claim 1, wherein the control is performed.
An integrated circuit for an optical disk device according to claim 1. 9. A circuit according to claim 1, wherein a register is provided, and a circuit for performing power-down according to data held in the register and a method for performing power-down can be selected. Integrated circuit for optical disk devices.