KR20050106733A - Apparatus and method for controlling sled home-in of the optical disk player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control device and method of the sled groove of an optical disc reproducing system, and more particularly, to an optical pickup unit for picking up a signal recorded on an optical disc, a sled motor for moving a position of the optical pickup unit, and a sled motor. The motor drive unit and the memory unit storing the position information which is the sled groove located inside the optical disk, and the motor driving unit and the sled according to the position information which is the sled groove stored in the memory when the optical disk is seated in the tray and in the tray-in state. It includes a servo control unit for controlling the driving of the motor. Therefore, the present invention checks the position of the optical pickup recorded in the memory when the tray seating the optical disk is trayed into the system, and controls the process to perform the sled groove only when the optical pickup is outside the optical disk. This can prevent the waste of power in the process.

Description

Control device which is a sled groove of optical disc playback system and its method {APPARATUS AND METHOD FOR CONTROLLING SLED HOME-IN OF THE OPTICAL DISK PLAYER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc reproducing system, and more particularly, to selectively carry out a sled home in process of moving an optical pickup unit into an optical disc when a tray for seating the optical disc is trayed into the system. The present invention relates to a control device which is a sled groove of an optical disc reproducing system, and a method thereof.

In general, a CD (Compact Disk) playback system storing music media data is widely used. At present, a system for reproducing video and audio data of a DVD (Digital Video Disk) whose recording capacity is significantly increased compared to a CD as another optical disk is also widely used.

1 is a configuration diagram briefly showing an optical disc reproducing system according to the prior art. Referring to FIG. 1, a conventional optical disc reproducing system includes an optical disc 10, an optical pickup unit 12, an RF amplifier 14, a digital signal processor (DSP) 16, a key input unit 18, and a microcomputer 20. And a servo control unit 22, a motor driving unit 24, a sled motor (SLM) 26, a spindle motor (SPM) 28, and the like.

The optical pickup section 12 is an optical pickup section for signals recorded on the optical disc 10 such as CD or DVD. The RF amplifier 14 filters the RF signal picked up by the optical pickup unit 12 and amplifies the RF signal to a predetermined size and outputs it as a binary pulse. The DSP 16 digitally processes the signal of the RF amplifier 14 and reproduces the original signal. The key input unit 18 is a portion to which an operation key signal of the optical disc reproducing system is input. The microcomputer 20 controls the internal configuration of the system according to the signal of the key input unit 18. The servo controller 22 detects a signal of the RF amplifier 14 to control the position of the optical pickup unit 12 or the rotation of the optical disk. The motor driver 24 drives the sled motor (SLM) 26 or the spindle motor (SPM) 28. The sled motor (SLM) 26 moves the position of the optical pick-up unit 102. The sled motor (SLM) 26 moves the position of the optical pick-up unit 102 when the tray (not shown) for seating the optical disc 10 is trayed into the system. Move it inside the disc. And the spindle motor (SPM) 28 rotates the optical disk 10 at a constant rotation frequency.

2 is a flowchart showing a reproduction process of an optical disc according to the prior art. 1 and 2, the optical disc reproducing system configured as described above undergoes the following reproducing process when the optical disc is reproduced.

First, when the optical disk 10 is seated in a tray provided in the system and trayed in into the system, the motor driver 24 may control the sled motor (SLM) 26 under the control of the servo controller 22. Sled home in operation for driving the optical pickup unit 12 to the inside of the disk is performed by driving. (S10 to S12) Although not shown in the drawing, the motor driving unit (under the control of the servo controller 22) 24 drives the spindle motor (SPM) 28 to rotate the optical disc 10 at a constant speed.

The optical pickup unit 12 emits a laser diode (not shown) in order to read a signal recorded on the recording surface of the optical disc 10 to form an optical spot on the recording surface, and reflects the light spot of the optical spot to a photodiode (not shown). And then outputs it as an electrical RF signal. (S14) The RF amplifier 14 filters the RF signal of the optical pickup unit 12, amplifies it to a predetermined size, and converts it into a binary signal. Delivers to DSP 16.

The servo controller 22 detects a signal of the RF amplifier 14 and compares the detected signal with the waveform or magnitude of the set signal. As a result, when the signal of the RF amplifier 14 differs from the waveform or magnitude of the set signal, the servo controller 22 drives. (S16)

Accordingly, the motor driving unit 24 operates to operate the sled motor (SLM) 26 to perform servo control to adjust the vertical and horizontal positions of the focus lens of the optical pickup unit 12 (S18).

Then, the optical pickup unit 12 converts the optical signal picked up by the laser diode (not shown) and the photodiode into an electrical RF signal and transmits the electrical signal to the RF amplifier 14, and the RF amplifier 14. After filtering the RF signal of the optical pickup unit 12, amplifies it to a predetermined size, converts it into a binary signal, and delivers it to the DSP 16. The DSP 16 digitally processes the signal of the RF amplifier 14 to reproduce (read) the signal of the original optical disc. (S20)

However, the optical disc reproducing system according to the related art performs a process of being a sled groove for moving the optical pickup unit 12 to the inside of the optical disc every time the optical disc 10 is seated in the tray and trayed in. However, even when the optical pickup unit 12 is in the sled groove located inside the optical disc because the tray is open or powered off during the previous optical disc playback, the sled motor (SLM) ( 126 has a problem of performing a process that is a sled groove.

An object of the present invention is to check the position of the optical pickup portion recorded in the memory when the tray on which the optical disk is seated in the system in order to solve the problems of the prior art as described above only when the optical pickup portion is outside the optical disk. Disclosed is a sled groove control apparatus and method for controlling an optical disc reproducing system to perform a red groove-in process.

In order to achieve the above object, the present invention provides an optical disc reproducing system comprising: an optical pickup unit for picking up a signal recorded on an optical disc; a sled motor for moving a position of the optical pickup unit; a motor driver for driving a sled motor; The pickup unit stores the position information which is the sled groove located inside the optical disk, and when the optical disc is seated in the tray and controls the driving of the motor driving unit and the sled motor according to the position information of the sled groove stored in the memory. It includes a servo control unit.

In order to achieve the above object, the method of the present invention is a control method of an optical disc reproducing system, comprising: determining whether an optical disc is seated in a tray and being tray-in; and when the optical disc is tray-in, position information which is a sled groove of the stored optical pickup unit Checking the step; if the position information of the sled groove of the optical pickup unit does not have the set value, moving the optical pickup unit to the position of the sled groove of the optical disc; and the position information of the sled groove of the optical pickup unit has the set value. In this case, the step of not moving the optical pickup to a position which is a sled groove of the optical disc.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a configuration diagram schematically showing a control device that is a sled groove of the optical disc reproducing system according to the present invention. Referring to FIG. 3, an optical disc reproducing system according to the present invention includes an optical disc 100, an optical pickup unit 102, an RF amplifier 104, a DSP 106, a key input unit 108, a microcomputer 110, and a memory. 112, the servo control unit 114, the motor driving unit 116, the sled motor (SLM) 118, the spindle motor (SPM) 120, and the like.

The optical pickup section 102 is an optical pickup section for signals recorded on the optical disc 100 such as CD or DVD. The RF amplifier 104 filters the RF signal picked up by the optical pickup unit 102, amplifies the RF signal to a predetermined size, converts the RF signal into a binary signal, and outputs the converted binary signal. The DSP 106 digitally processes the signal of the RF amplifier 104 and reproduces the original signal. The key input unit 108 becomes a part to which an operation key signal of the optical disc reproducing system is input. The microcomputer 110 controls the internal configuration of the system according to the signal of the key input unit 108. The memory 112 stores position information of whether or not the optical pickup unit 102 is in the position of being the sled groove. The servo controller 114 detects a signal of the RF amplifier 104 to control the position of the optical pickup unit 102 or the rotation of the optical disc 100. The motor driver 116 drives the sled motor (SLM) 118 or the spindle motor (SPM) 120. The sled motor (SLM) 118 moves the position of the optical pickup unit 102. The sled motor (SLM) 118 moves the position of the optical pickup unit 102. The sled motor (SLM) 118 moves the position of the optical pickup unit 102 when the tray (not shown) that seats the optical disc 100 is trayed into the system. Move it inside the disc. And the spindle motor (SPM) 120 rotates the optical disk 100 at a constant rotation frequency.

4 is a flowchart illustrating a control method of being a sled groove in the process of playing an optical disc according to the present invention. 3 and 4, the optical disc reproducing system according to the present invention configured as described above performs a sled groove control process as follows when the optical disc is reproduced.

First, when the optical disk 100 is seated in a tray (not shown) provided in the system and is trayed into the system, the microcomputer 110 may store the memory 112 before the servo control 114 performs the sled groove-in operation. The location information, which is the sled groove of the optical pickup unit 102, is stored in operation S102. That is, the microcomputer 110 checks the optical pickup unit 102 when the flag stored in the memory 112 is a set value, for example, "1". ) Is determined to be the sled groove, and when the flag is "0", it is determined that the optical pickup unit 102 is not at the sled groove.

As a result of the check in S102, it is determined whether the flag information stored in the memory 112 is "1" or "0". (S104)

As a result of the determination in S104, when the flag is "0", the microcomputer 110 determines that the optical pickup unit 102 is not in the position of the sled groove and transmits a drive signal that is the sled groove to the servo controller 114. Accordingly, the servo control unit 114 drives the motor driving unit 116 and the sled motor (SLM) 118 to move the optical pickup unit 102 to a position which is a sled groove inside the optical disc (S106). Although not shown, the optical disk 100 is rotated at a constant speed by driving the motor driver 116 and the spindle motor (SPM) 120 under the control of the servo controller 114.

If the flag S1 determines that the flag is "1", the microcomputer 110 determines that the optical pickup unit 102 is in the sled groove position and does not send the servo control unit 114 the drive signal in the sled groove. Accordingly, the servo controller 114 does not perform an operation of being a slat groove for moving the optical pickup unit 102 to the inside of the optical disc.

The optical pickup unit 102 emits a laser diode (not shown) to form a light spot on the recording surface in order to read a signal recorded on the recording surface of the optical disk 100, and reflects the light spot of the optical spot to a photodiode (not shown). And then outputs it as an electrical RF signal. (S108) The RF amplifier 104 filters the RF signal of the optical pickup unit 102, amplifies it to a predetermined size, and converts it into a binary signal. Pass to DSP 106.

The servo controller 114 detects a signal of the RF amplifier 104 and compares the detected signal with the waveform or magnitude of the set signal. As a result, when the signal of the RF amplifier 104 is different from the waveform or magnitude of the set signal, the servo controller 114 drives.

Accordingly, the motor driving unit 116 operates to operate the sled motor (SLM) 118 to perform servo control to adjust the vertical and horizontal positions of the focus lens of the optical pickup unit 102 (S112).

Then, the optical pickup unit 102 converts the optical signal picked up by the laser diode (not shown) and the photodiode into an electrical RF signal and transmits the electrical signal to the RF amplifier 104, and the RF amplifier 104. After filtering the RF signal of the optical pickup unit 102, and amplifies it to a predetermined size, converts it into a binary signal and delivers it to the DSP 106. The DSP 106 digitally processes the signal of the RF amplifier 104 to reproduce (read) the signal of the original optical disc.

When the signal of the optical disk is reproduced, the microcomputer 110 detects whether a tray open key signal or a power off key signal is input from the key input unit 108 (S116).

As a result of S116 detection, when the tray open key or the power off key signal is detected, the microcomputer 110 sends a drive signal that is a sled home to the servo controller 114, and the motor driver 116 and the sled through the server controller 114. After driving the motor (SLM) 118 to perform an operation which is a sled groove for moving the optical pickup unit 102 to the inside of the optical disk, the flag value stored in the memory 112 is set to " 1 " "To save. (S118)

If the tray open key or the power off key signal is not detected as a result of S116 detection, the microcomputer 110 terminates without performing the control method of the sled groove according to the present invention.

 On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

As described above, the present invention checks the position of the optical pickup portion recorded in the memory when the tray seating the optical disk is trayed into the system, and controls to perform the sled groove process only when the optical pickup portion is outside the optical disk. There is an effect to prevent the waste of power consumed in the process of unnecessary sled grooves.

1 is a configuration diagram briefly showing an optical disc reproducing system according to the prior art;

2 is a flowchart showing a reproduction process of an optical disc according to the prior art;

3 is a configuration diagram schematically showing a control device that is a sled groove of an optical disc reproducing system according to the present invention;

4 is a flowchart illustrating a control method of being a sled groove during an optical disc reproduction process according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: optical disk 102: optical pickup unit

104: RF amplifier 106: DSP

110: microcomputer 112: memory

114: servo control unit 116: motor drive unit

118: SLM 120: SPM

Claims (4)

As an optical disc playback system, An optical pickup unit for picking up a signal recorded on the optical disc; A sled motor for moving the position of the optical pickup; A motor driver for driving the sled motor; A memory in which the optical pickup unit stores position information which is a sled groove located inside the optical disk; Servo control unit for controlling the driving of the motor drive unit and the sled motor according to the position information of the sled groove stored in the memory when the optical disk is seated in the tray in the tray-in state Control device that is a sled groove of the optical disk playback system comprising a. The method of claim 1, The servo controller does not drive the motor driver and the sled motor when the position information of the sled groove stored in the memory has a set value, and the motor driver if the position information of the sled groove does not have a set value. And controlling the optical pickup unit to move to a position which is a sled groove of the optical disc by driving the sled motor. As a control method of an optical disc playback system, Determining whether the optical disc is seated in a tray and trayed in; When the optical disc is tray-in, checking position information which is a sled groove of the stored optical pickup unit; Moving the optical pickup unit to a position of a sled groove of the optical disc when the position information of the sled groove of the optical pickup unit does not have a set value; Not moving the optical pickup unit to a sled groove position of the optical disk when the position information of the sled groove of the optical pickup unit has a set value; Sled groove control method of the optical disk playback system comprising a. The method of claim 3, wherein After the optical pickup unit is moved to a position that is a sled groove of the optical disk, when a set key signal is input, the optical pickup unit is moved to a position which is a sled groove of the optical disk, and the sled groove is A control method which is a sled home of an optical disc reproducing system, further comprising the step of storing position information.