KR970004971Y1 - Optical disk device - Google Patents

Abstract

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Description

Optical disc devices

1 is a system block diagram of an optical disk device according to the present invention.

2 is a detailed system block diagram of an optical disk device according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: system control unit

30: power supply unit 40: recording unit

50: optical pickup unit 60: playback unit

70: relay (RL) 80: disk drive unit

90: optical disc

The present invention relates to an optical disk device (Compact Disk Player, hereinafter referred to as CDP), and more particularly, to an apparatus for reducing power consumption of a system by turning on / off the power supply of each block for each function in an optical disk device capable of recording. will be.

In general, an optical disc apparatus is a system for recording and reproducing an applied audio signal and a video signal using light (or a laser signal) without contacting the disc. The system is divided into a recording unit and a reproducing unit to obtain a nearly perfect recording and reproducing effect by performing digital signal processing, and has the advantage of recording a large-size telegram.

However, this system is almost exclusively a reproduction-only system because the user cannot easily record due to the Pits on the disc with the laser beam according to the specificity of the recording technology (digital information of the applied recording signal).

Recently, however, CD-WORM (Write Once Read Many) has emerged as an optical disc device capable of recording only once, but information recording is still limited.

Such an optical disk apparatus has a problem in that unnecessary power is wasted because the power supply of the system is uniformly provided even though the recording circuit, the reproduction circuit and the reproduction circuit are operated separately.

For example, when playing back using a CD-WORM (or CD-WO), an optical disc device that can be written only once, the power is continuously supplied to an unused recording unit, especially a laser power circuit and an encoding circuit having a large power consumption. It consumes power.

Accordingly, an object of the present invention is to provide a power saving circuit for reducing power consumption of a system by supplying power for each function so that power is not continuously supplied to the recording circuit during reproduction.

In order to achieve the above object, the present invention provides a key input unit, a system control unit for controlling all functions of the system by a signal output from the key input unit, and a laser beam for picking up a laser beam for recording and reproducing information on a driven optical disk. An optical disc apparatus capable of recording comprising an optical pickup unit, a recording unit for transferring the incoming signal to the optical pickup unit, and a reproducing unit for reproducing the signal output from the optical pickup unit;

A power supply unit for providing necessary supply power to each part in the optical disk device divided by functions;

And a control switch for controlling whether the power supplied from the power supply unit to the recording unit is applied by the control signal of the system control unit.

Next, the present invention will be described in detail with reference to the illustrated drawings.

First, FIG. 1 is a system block diagram of an optical disk apparatus according to the present invention, and more particularly, relates to an optical disk apparatus capable of recording and reproducing an audio signal.

The configuration of FIG. 1 includes a key input unit 10 including function keys; The system control unit 20 outputs a control signal for controlling all functions of the optical disc apparatus according to the key information output from the key input unit 10, and converts the signal into a recordable signal when the audio signal to be recorded is introduced. An optical pickup unit 50 for picking up and recording and reproducing the laser beam from the recording unit 40, the signal output from the recording unit 40 to the optical disc 90, and the reproduction data (or Information) is connected to the reproducing unit 60 for converting the information into a live audio signal before recording, and the one side contact to the recording unit 40 and the power supply unit 30, respectively, and to the recording unit 40 by the control signal of the system control unit 20. ) And a control switch 70 for switching the opening and closing of the passage between the power supply unit 30. Mainly used as the control switch 70 is a relay (RL). Here, the general theory of the recording unit 40 and the reproducing unit 60 is as described above, but the constitutive block in the present embodiment includes the reproducing unit 60 including a block that has been configured in the conventional optical disc device for reproducing, and the recording unit 40. ) Means that the record function is attached and includes only the newly added elements. Therefore, elements that are shared in operation in the recording unit 40 and the reproducing unit 60 are included in the reproducing unit 60.

In the operation of FIG. 1, when power is applied through the outlet and the key input unit 10 of the system, the power supply unit 30 includes the key input unit 10, the system control unit 20, the reproduction unit 60, and the optical pickup unit 50. And supplying power to the control switch 70.

When the user selects the playback mode through the key input unit 10, the system controller 20 outputs a control signal to the control switch 70 so that the switch is turned off.

Accordingly, since the power supply is cut off from the recording unit 40 that has been supplied with power even though it does not operate conventionally, the power consumption of the recording unit 40 can be reduced. However, at the time of recording, the control signal is applied so that the control switch 70 is turned on in the system control unit 20 so that the power supply unit 30 is supplied with the power supply unit 30 as in the related art.

2 is a system block diagram of the CD-WORM as shown in FIG.

2, the key input unit 10, the system control unit 20, the power supply unit 30, the optical pickup unit 50, and the control switch 70 are connected as in FIG.

The recording unit 40 modulates and encodes the amplification means 41 for amplifying and outputting an audio signal for recording, and an A / D converter for converting the output signal of the medium width means 41 into a digital signal. Encoding means 43 and laser pulse modulation means 44 for modulating and outputting the output signal of the encoding means 43 again in synchronization with a high frequency.

Only the newly added elements are included for the recording section 40 as described above in FIG.

Therefore, the reproducing section 60 includes laser power control means 66 and servo means 61 which are common at the time of recording and reproduction.

The laser power supply control unit 66 is configured to transmit a signal output from the recording unit 40 to the optical pickup unit 50, and to keep the power of the laser of the optical pickup unit 50 constant at all times. This is because the laser changes sensitively to the ambient temperature.

The optical pickup unit 50 is similar to the conventional configuration. That is, the laser diode (not illustrated) generating a laser by the signal output from the laser power controller 66 and the beam applied from the laser diode are bypassed to the objective lens (not illustrated) and the objective lens is A laser beam splitter for outputting a beam reflected by the beam bypassed through the laser beam at a predetermined angle, and a beam applied from the laser beam splitter is projected to a predetermined position on the optical disc 90 and the reflected light is emitted to the laser beam. And an objective lens for outputting to the splitter, a photodiode 90 for receiving the reflected light through the beam splitter, an actuator, and the like.

The disk drive unit 80 is composed of a spindle motor, a spindle motor control means, a scanning motor control means of the optical pickup unit 50, and the like. The reproducing unit 60 controls the focusing and tracking of the optical disc 90 by the signals output from the above-described laser power control unit 66 and the photodiode as the light receiving element of the optical filling-up unit 50. Digitizing means 62 for demodulating to digitize the signal output from the photodiode, which is a light receiving element of the optical pickup 50, and decoding means for demodulating the output signal of the digitizing 62 again. And amplifying means 65 for amplifying the output signal of the D / A converter 64 to reproduce the live sound before recording.

The operation of FIG. 2 is as follows.

When the user applies power through the outlet and the key input unit 10, the power supply unit 30 is the key input unit 10, the system control unit 20, the control switch 70, the disk drive unit 80, the playback unit 60 (D) provide supply power.

The user applies the recording mode control signal to the system control unit 20 through the key input unit 10.

The system control unit 20 outputs the switching ON signal to the control switch 70 because it is in the recording mode. The control switch 70 is switched ON so that the power supplied from the power supply unit 30 to one contact point is supplied to the recording unit 40 and supplied to the recording unit 40 to operate the recording unit 40.

Therefore, when the audio signal to be recorded is inputted, the amplifying means 41 amplifies to a predetermined value, and the A / D converter 42 digitally converts it into 8-bit data and outputs it.

The encoding means 43 modulates and outputs the input 8-bit data into 14 bits in order to prevent the minimum unit of the pit of the optical disc 90 from becoming very short.

This modulation is called EFM (Eight to Fourteen Modulation). When the EFM and the NRZ-I modulated signal are applied, the laser pulse modulator 44 performs secondary modulation to be synchronized with a frequency higher than the NRZ-I modulated frequency and outputs the same to the laser power controller 66.

The laser power supply 66 outputs to the monitor diode which is a light receiving element of the optical pickup unit 50 and controls the power of the laser to be constant through the monitor diode which is the light receiving element of the optical pickup unit 50.

The operation of the optical pickup section 50 operates as described above in the configuration.

The reproducing unit 40 vertically adjusts the objective lens of the optical pickup unit by the beam received through the photodiode of the optical pickup unit 50 to maintain a constant distance between the objective lens and the signal surface of the optical disc 90. The optical pickup unit 50 is controlled by a servo unit 60 consisting of a focusing servo for tracking and a tracking servo for adjusting an objective lens to accurately follow the track of the optical disk 90 after the focusing servo is precisely operated. . The optical pickup unit 50 is controlled through the servo means 60. Under the control of the servo means 61, the signal reproduced through the photodiode of the optical pickup section 50 in the optical disk 90 is demodulated and output by the digitizing means 62 as a 14-bit digital signal. The decoding means 63 demodulates the signal output from the digitizing means 62 into an 8-bit digital signal and outputs it to the D / A converter 64. The output signal is converted into an analog signal by the D / A converter 64, and amplified by a predetermined value through the amplifying means 65 so as to obtain a reproduction effect of the original sound.

The disc drive unit 80 controls the CLV (Constant Linear Velocity) before the optical disc 90.

On the other hand, when the play mode control signal is applied through the key input unit 10, the system control unit 20 controls so that the control switch 70 is turned off. Therefore, the power supply is not supplied to the recording unit 40, and the recording operation is not performed by the reproduction mode control signal of the system control unit 20. On the other hand, the disc drive unit 80, the optical pickup 50, the playback unit 60, the system control unit 20, the key input unit 10, etc., are supplied with the power by the power supply unit 30 as in the case of recording. Works as

As described above, the present invention provides a recordable optical disc apparatus, comprising: a reproducing section made up of components of a conventional reproducing optical disk apparatus, a reproducing section made up of newly added components, and a recording section made up of newly added components. By supplying the power to cut off the power supply of the recording unit during playback, there is an advantage that can reduce the power consumption of the system.

Claims (1)

An optical pickup unit for reading or recording a signal recorded on an optical disc, and a recording unit for transferring an incoming input signal to the optical pickup unit; A key input unit for inputting a command for controlling a reproduction or recording operation from a reproduction unit user for reproducing a signal picked up by the optical pickup unit; A system control unit controlling the operation of the recording unit and the reproduction unit according to a command input through the key input unit; A recordable optical disc apparatus including an optical pickup unit, a recording unit, a reproducing unit, a key input unit, and a power supply unit for supplying operation power to a system control unit, the recordable optical disc apparatus comprising: a switch provided between the power supply unit and the recording unit, And the system controller cuts off the sound switch when a command for controlling a reproducing operation is applied through the key input unit so that power consumed by the recording unit is not consumed during the reproducing operation.