JPH1011946A - Optical disk drive - Google Patents

Abstract

(57) Abstract: The present invention relates to an optical disk device that records or reproduces information by light, and more particularly to an optical disk device that can remove scratches, dirt, and the like on the surface of an optical disk, and has scratches, dirt, and the like. The present invention relates to an optical disk device capable of reproducing data stably on an optical disk. SOLUTION: In the optical disk device of the present invention, a slider having a pair of sliding surfaces for polishing an optical disk is supported by the polishing head 12 and the optical disk 1 is stably pressed by the polishing head 12. Is moved in the tracking direction of the optical disk 1 by the driving device. According to the present invention, the polishing of the optical disk 1 can be performed effectively and reliably, and the data can be stably reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for recording or reproducing information by light, and more particularly to an optical disk device capable of removing scratches, dirt, etc. on an optical disk surface.

[0002]

2. Description of the Related Art A conventional optical disk device will be described below with reference to the drawings.

FIG. 6 is a block diagram showing the configuration of a conventional optical disk device. 6, a conventional optical disk device includes a spindle motor 22 for rotating an optical disk 21 as a recording medium, an objective lens 23 for condensing a laser beam on a recording surface of the optical disk 21, an actuator 24 for driving the objective lens 23, An optical sensor 25 for receiving the reflected light from the optical disk 21 is provided. The objective lens 23, the actuator 24, and the optical sensor 25 constitute an optical pickup 26. Further, the conventional optical disk device includes a control unit 28 for controlling the drive of the feed motor 27, the optical pickup 26, a signal processing circuit 29, an interface unit 30, and a controller unit 31 for controlling the entire optical disk device. It is.

[0004] An information track on which an information signal is recorded is formed in a spiral shape on the optical disk 21, and the surface thereof is covered with a transparent resin. Since the track pitch of the information tracks on the optical disk 21 is very small, the rotating optical disk 2 is required to accurately detect the information signal.
It is necessary to control the positioning of the light spot with respect to 1 with high accuracy. The optical pickup 26 includes a mechanism section and an optical section. The mechanism section includes an objective lens 23 for condensing light on the recording surface of the optical disk 21 and the objective lens 23 in a direction perpendicular to the optical disk 21 (hereinafter referred to as a focus direction). ) And an actuator 24 for driving the optical disc 21 in the tracking direction. The optical section is composed of various prisms and sensors including a semiconductor laser. Laser light from the semiconductor laser is condensed by the objective lens 23 and forms a minute spot on the optical disc 21. The reflected light from the optical disk 21 is again
The position is detected by the optical sensor 25 for detecting the displacement of the light spot in the focus direction and the tracking direction.

The signal from the optical sensor 25 in the optical pickup 26 is input to the control unit 28, and the focus direction of the objective lens 23 is adjusted so that the focal position of the light spot always follows the information recording surface of the optical disk 21 and the target track. And position control in the tracking direction. The control unit 28 controls the feed motor 27 when moving greatly between tracks.
To move the optical pickup 26 to the target track.

On the other hand, the signal of the optical sensor 25 is also used for detecting an RF signal which is an information signal, and this RF signal is modulated by a signal processing circuit 29 comprising a modulation / demodulation circuit and an error correction circuit. The processing is performed, and a signal is transmitted to a host device such as a personal computer via the interface unit 30.

[0007]

In recent years, the frequency band of an RF signal read by an optical pickup has been increasing with the shift to higher speed data transfer in an optical disk device. The high frequency band of the RF signal reduces the margin of the demodulation of the RF signal in the signal processing circuit and the data error correction capability, and the reflection from the optical disk due to the scratches and dirt on the resin surface of the optical disk. The signal processing circuit cannot cope with the optical defect, and the information signal recorded on the optical disc cannot be reproduced.

In order to solve such a problem, there is only a kit for performing correction manually using a disk abrasive and a special cloth. In addition, as a technique and a device for repairing scratches on other resins, those related to paint finishing of automobiles are well known, and a disc-shaped polishing tool made of cloth or sponge, a high-speed rotating electric tool, and a liquid Alternatively, a paste-type abrasive is used, in which a rotating abrasive tool is pressed against a painted surface to remove a scratch on the painted surface and smoothen the surface. However, in the case of manual work and those using electric tools, the force for pressing the special cloth and the polishing tool against the repaired surface is not stable because it is by hand, and the effect of repairing the scratches varies, and polishing of the optical disc requires polishing. It cannot be implemented effectively and reliably.

The present invention has been made in order to solve the above-mentioned problems, and relates to an optical disk apparatus capable of stably reproducing data from an optical disk having scratches, dirt, and the like.

[0010]

In the optical disk apparatus of the present invention, a slider having a pair of sliding surfaces for polishing an optical disk is supported by the polishing head, and the optical disk is stably pressed by the polishing head. The head is moved by a driving device in the radial direction of the optical disk (hereinafter, tracking direction). According to the present invention, polishing of an optical disk can be performed effectively and reliably.
Stable data reproduction is possible.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention has an optical pickup for focusing a laser beam on an optical disk whose surface is coated with a transparent resin, and the optical disk is provided with an optical pickup. An optical disc device that irradiates laser light, receives reflected light of the irradiated laser light, and reproduces data of an optical disc, comprising: a slider having a pair of sliding surfaces for polishing a resin surface of an optical disc; A polishing head that supports and presses the slider against the surface of the optical disc; and a drive device that moves the polishing head in the radial direction of the optical disc. The polishing head can be pressed against the optical disk with a stable force, so that scratches and dirt on the surface of the optical disk can be efficiently and reliably removed and stable. And it is the reproduction of data.

According to a second aspect of the present invention, there is provided a loading mechanism for loading the polishing head onto the resin surface of the optical disk, and loading the polishing head onto the resin surface of the optical disk after the rotation of the optical disk and outside the data area of the optical disk. It is always loaded outside the optical disk data area and after rotation of the optical disk when the device starts up, and the polishing head enables stable data reproduction without damaging the optical disk surface with dents etc. Becomes

Hereinafter, an optical disk device according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an optical disk device according to the present invention, FIG. 2 is a perspective view showing an embodiment of a polishing head used in the optical disk device according to the present invention, and FIG. 3 is a sectional view showing an optical disk as a recording medium. It is a thing. In FIG. 1, an optical disk device according to the present embodiment includes a spindle motor 2 for rotating an optical disk 1 as a recording medium, an objective lens 3 for converging a laser beam on a recording surface of the optical disk 1, and an objective lens 3 to be driven. An actuator 4 and an optical sensor 5 for receiving light reflected from the optical disc 1 are provided.
An optical pickup 6 is constituted by the optical sensor 5. The optical disk device according to the present embodiment includes a feed motor 7, a control unit 8 that controls each drive of the optical pickup 6, a signal processing circuit 9, an interface unit 10, and a controller unit that controls the optical disk device system. 11
, A polishing head 12, a drive motor 13 for moving the polishing head 12 in the tracking direction, and a loading mechanism 14 for the polishing head 12. As shown in FIG. 2, the polishing head 12 is composed of a slider 12b having a pair of sliding surfaces 12a and a leaf spring 12c that adhesively supports the slider 12b with a resin or the like and supplies a pressure to the optical disk surface. The polishing head 12 is held by the loading mechanism 14 when the optical disc 1 is not rotating, and is loaded onto the optical disc 1 after the rotation of the optical disc 1 starts.

As shown in FIG. 3, an information track 15 on which an information signal is recorded is spirally formed on a resin base 16 on the optical disk 1, and the surface thereof is made of a transparent resin 1.
It is covered with seven. The optical pickup 6 includes a mechanical unit and an optical unit. The mechanical unit includes an objective lens 3 for condensing light on the recording surface of the optical disk 1 and the objective lens 3 in a focusing direction of the optical disk 1 and a tracking direction of the optical disk 1. An actuator 4 for driving is configured. The optical section is composed of various prisms and sensors including a semiconductor laser. Laser light from the semiconductor laser is converged by the objective lens 3 and forms a minute spot on the optical disc 1. The reflected light from the optical disk 1 returns to the objective lens 3 again, and is detected by an optical sensor 5 for detecting a positional deviation of the light spot in the focus direction and tracking direction. So that the focal position of the objective lens 3 always follows the information recording surface of the optical disc 1 and the target track.
Of the focus direction and the tracking direction of the camera. When the control unit 8 moves largely between tracks, the control unit 8 controls the feed motor 7 to move the optical pickup 6 to the target track. The signal of the optical sensor 5 is also used for detecting an RF signal as an information signal.
The signal is subjected to signal processing such as modulation / demodulation and data error correction by a signal processing circuit 9 including a modulation / demodulation circuit and an error correction circuit, and is transmitted to a host device such as a personal computer via the interface unit 10.

The lift generated on the sliding surface 12a of the slider 12b due to the rotation of the optical disk 1
2b is balanced with the pressing force of the leaf spring 12c supporting the
The polishing head 12 supplies a stable pressure to the resin surface of the optical disc 1. This pressing can be controlled by the rotation speed of the optical disc 1. By moving the polishing head 12 to the entire diameter by the drive motor 13 and controlling the rotation speed of the optical disc 1, the polishing head can be controlled over the entire area of the optical disc 1. Numeral 12 can supply a stable pressure to the resin surface of the optical disc 1. As described above, since the polishing head 12 can supply a stable pressure onto the optical disk 1, it is possible to efficiently and reliably remove scratches, dirt, and the like on the optical disk resin surface.

Next, a starting method of the optical disk device of the present invention,
And a stopping method will be described. FIG. 4 is a flowchart showing a procedure when starting the optical disc apparatus, and FIG. 5 is a flowchart showing a procedure when stopping the optical disc apparatus. In FIG. 4, the optical disk 1 is activated by first moving the optical pickup 6 to the innermost circumference by the control unit 8 (step 1).
The semiconductor laser is emitted by the controller unit 11 (step 2), the spindle motor 2 is rotated at a high speed by the control unit 8 (step 3), the actuator control of the pickup is turned on (step 4), and the loading mechanism 14 The polishing head 12 is loaded on the optical disk 1 (step 5), the number of revolutions of the optical disk 1 is adjusted to the data reproduction speed, and the data is read (step 6). As shown in FIG. 5, when the optical disk apparatus is stopped, the control unit 8 moves the polishing head 12 out of the data area on the innermost peripheral side of the optical disk 1 (step 11), and moves the polishing head 12 by the loading mechanism 14. Hold (step 12) and brake the spindle motor 2 (step 1).
3), the actuator control and the semiconductor laser are turned off (step 14). By taking such a procedure, the polishing head 12 is always out of the data area of the optical disc 1 after the rotation of the spindle motor 2 when the optical disc apparatus is started. The polishing head 12 is loaded on the optical disc 1.
Does not damage the optical disc 1 such as a dent.

[0017]

According to the present invention, since the polishing head can be pressed against the optical disk with a stable force, it becomes possible to efficiently and reliably remove scratches, dirt, etc. on the optical disk resin surface. The effect is obtained. According to another aspect of the present invention, the polishing head is always loaded on the optical disc after the rotation of the spindle motor outside the data area because the optical disc is polished when the optical disc apparatus is started. Is not given to the optical disc, which has a scratch, dirt, etc.
The effect of enabling stable data reproduction can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing one embodiment of a polishing head used in the optical disc device of the present invention.

FIG. 3 is a cross-sectional view of an optical disc as a recording medium.

FIG. 4 is a flowchart showing a procedure at the time of starting the optical disc apparatus.

FIG. 5 is a flowchart showing a procedure when the optical disk device is stopped.

FIG. 6 is a block diagram showing a configuration of a conventional optical disk device.

[Explanation of symbols]

 1,21 Optical disk 2,22 Spindle motor 3,23 Objective lens 4,24 Actuator 5,25 Optical sensor 6,26 Optical pickup 7,27 Feed motor 8,28 Control unit 9,29 Signal processing circuit 10,30 Interface unit 11 , 31 Controller 12 Polishing head 12a Sliding surface 12b Slider 12c Leaf spring 13 Drive motor 14 Loading mechanism 15 Information track 16 Substrate 17 Resin

Claims (2)

[Claims] An optical pickup for focusing laser light on an optical disk whose surface is coated with a transparent resin on a recording medium, irradiating the optical disk with laser light, and reflecting the irradiated laser light An optical disk device for receiving light and reproducing data from an optical disk, comprising: a slider having a pair of sliding surfaces for polishing a resin surface of the optical disk; a slider supporting the slider, and urging the slider against the surface of the optical disk. An optical disc device, comprising: a polishing head for performing polishing; and a driving device for moving the polishing head in a radial direction of the optical disc, wherein the polishing head removes scratches, dirt, and the like on an optical disc resin surface. 2. The method according to claim 1, further comprising a loading mechanism for loading the polishing head onto the resin surface of the optical disk, and loading the polishing head onto the resin surface of the optical disk after the rotation of the optical disk and outside the data area of the optical disk. The optical disk device according to claim 1.