JP3093865U - Optical disk drive - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To repair an optical disc by a minimum necessary polishing process in an optical disc apparatus 1 having a function of restoring a scratched optical disc 2. SOLUTION: While rotating an optical disk 2, an optical pickup 4 is moved, while monitoring data read from the optical disk 2, a track where data is discontinuous is detected, and the position of the track is stored as a range where a scratch exists. I do. Further, the depth of the scratch is estimated while focusing the optical pickup 4 at the scratch on the optical disc 2. The surface of the optical disk 2 is polished to a predetermined depth corresponding to the estimated depth of the scratch while the polishing pad 7 is brought into contact with the range of the track where the scratch on the surface of the optical disk 2 is present and in the vicinity thereof. . If the depth of the flaw is deeper than the allowable polishing depth of the optical disk 2, the optical disk 2 cannot be repaired, so that the polishing process is not performed.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to an optical disc device having a function of repairing a scratched optical disc. To do.

[0002]

[Prior art]

  As is well known, CDs (compact discs), DVDs (digital versatile discs), etc. If there is a scratch on the recording side of the optical disc, the laser light for reading data will However, the amount of light that reaches the recording layer due to scattering at the scratches is reduced, and the light is refracted at the scratches. It is possible to read the data immediately below the scratched area without reaching the original position. It may not be possible. Therefore, in order to remove scratches on the surface of the optical disk, In addition, kits and the like for manually polishing the surface of an optical disk are commercially available.

[0003]   Further, in Patent Document 1, Patent Document 2 and Patent Document 3, the surface of the optical disk is polished. An optical disk device having a function to perform is shown. In these optical disc devices While rotating the optical disk using the disk rotation mechanism of the optical disk device, A polishing pad or the like is pressed against the recording surface side of the optical disk to polish the surface.

[0004]   Further, Patent Document 4 discloses a dedicated device for polishing the surface of an optical disc. It Further, in Patent Document 5, a resin is coated on a scratched portion on the surface of the optical disc to prevent scratches. It describes that it should not be recognized.

[0005]

[Patent Document 1]   JP, 10-11946, A (Fig. 1, paragraph 0015).

[Patent Document 2]   JP, 10-144049, A (Fig. 1, paragraph 0013).

[Patent Document 3]   JP-A-10-222959 (FIG. 1, paragraph 0015)

[Patent Document 4]   JP, 10-92148, A (Drawing 1).

[Patent Document 5]   JP, 10-125044, A (paragraph 0005)

[0006]

[Problems to be solved by the device]

  In the conventional optical disk device having the function of polishing the surface of the optical disk, It does not have a function to detect the position, size, depth, etc. of scratches on the disc, and The entire area of the disk was polished (see, for example, paragraph 0015 of Patent Document 1). Only However, when the scratch is small, only the area near the scratch on the optical disk is polished. Is sufficient, and unnecessary polishing is performed on the other parts. The loss of time required for polishing was great.

[0007]   In addition, when the scratch is deep, it cannot be removed by polishing once, and the scratch is not removed more than once. Polishing must be repeated, but whether it needs to be re-polished depends on whether it has been polished. It may not be possible for the user to make a judgment without actually playing the optical disc. Re-polishing was very troublesome. In particular, the degree of scratches and the degree of polishing the surface If the optical disk cannot be repaired, the re-polishing process is wasted, so It is annoying.

[0008]   The present invention was made in order to solve the problems of the above conventional example. Minimum required for an optical disk device that has the function of polishing or repairing the disk surface Repairs an optical disc with scratches with a limited number of polishing cycles, polishing range, and polishing depth. The purpose is to

[0009]

[Means for Solving the Problems]

  In order to achieve the above object, the device according to claim 1 has an optical disk mounted around its central axis. Rotation mechanism to rotate the optical pickup and the optical pickup in the radial direction of the optical disk. And a lateral optical pickup drive mechanism that drives the optical pickup A vertical optical pickup drive mechanism for moving in a direction perpendicular to the recording surface, An optical disk device having a function of polishing the surface of an optical disk,   Polishing pad with felt impregnated with abrasive and movement of the optical pickup Is provided at a position that does not hinder the polishing of the recording surface side of the optical disc. The polishing pad is brought into contact with the surface of the optical disc on the recording surface side, and A polishing pad drive mechanism for moving a polishing pad in a radial direction of the optical disc; Rotation mechanism, the optical pickup, the horizontal optical pickup drive mechanism, the vertical direction While controlling the optical pickup driving mechanism and the polishing pad driving mechanism, An arithmetic control unit that performs predetermined arithmetic processing using a signal output from the optical pickup, , The vertical direction optical pickup drive mechanism, which was previously obtained by experiments, The relationship between the amount of movement of the optical pickup and the depth of scratches on the recording side of the optical disc Further comprising a reference data storage unit storing reference data shown,   The arithmetic control unit drives the rotating mechanism to rotate the optical disc, The lateral optical pickup drive mechanism is driven to move the optical pickup to the optical disc. The signal output from the optical pickup to monitor the signal output from the optical pickup. However, the area of the track on the optical disc where scratches exist is detected and further scratches exist. In the range of the existing track, drive the vertical optical pickup drive mechanism. The optical pickup is moved in a direction perpendicular to the recording surface of the optical disc, Data can be normally read from the optical disc by the pickup. Amount of movement of the optical pickup by the vertical optical pickup drive mechanism when Is compared with the reference data stored in the reference data storage section, Estimate the depth of scratches on the disk, and then use the estimated depth of scratches to remove the data from the recording surface of the optical disc. The depth of scratches on the optical disk is calculated by calculating the polishing depth that enables reading of the data. When it can be removed by polishing, the polishing pad drive mechanism is driven to move the optical disc. At least the range of the track where the scratches are Smoothly polish to the calculated polishing depth, and polish the scratch depth on the optical disc. When it cannot be removed by polishing, it indicates that the scratch on the optical disk cannot be repaired. No. is output.

[0010]   According to such a configuration, the optical disc device itself is configured so that the recording surface side of the optical disc is Detects the position of the scratch on the surface (range of the track where the scratch exists) and further estimates the scratch depth Then, whether the scratch depth on the optical disk can be removed by polishing based on the estimated scratch depth. If the scratch depth can be removed by polishing, it is judged from the estimated scratch depth. Calculate the depth at which data can be read from the recording surface of the optical disk, Calculate the range of the track where scratches exist on the optical disk and the predetermined range near it. The user can insert the optical disk into the optical disk device once because You can repair a scratched optical disk just by mounting it. Also, Polishing of the surface of the disk is performed a minimum number of times, range and depth, so the polishing process The time required for can be shortened. In addition, the depth of scratches on the disc can be If it cannot be removed more, a signal indicating that the scratch on the optical disk cannot be repaired is displayed. Since it is output, there is no need to perform unnecessary polishing work.

[0011]   The invention according to claim 2 is a rotating machine for rotating an optical disk around its central axis. And a lateral optical pick for moving the optical pickup in the radial direction of the optical disk. Up drive mechanism and the optical pickup perpendicular to the recording surface of the optical disc With a vertical optical pickup drive mechanism that moves the An optical disk device having a polishing function,   Polishing pad with felt impregnated with abrasive and movement of the optical pickup Is provided at a position that does not hinder the polishing of the recording surface side of the optical disc. The polishing pad is brought into contact with the surface of the optical disc on the recording surface side, and A polishing pad drive mechanism for moving a polishing pad in a radial direction of the optical disc; Rotation mechanism, the optical pickup, the horizontal optical pickup drive mechanism, the vertical direction While controlling the optical pickup driving mechanism and the polishing pad driving mechanism, An arithmetic control unit that performs predetermined arithmetic processing using a signal output from the optical pickup, Further equipped with,   The arithmetic control unit drives the rotating mechanism to rotate the optical disc, The lateral optical pickup drive mechanism is driven to move the optical pickup to the optical disc. The signal output from the optical pickup to monitor the signal output from the optical pickup. However, the area of the track on the optical disc where the scratch is present is detected, and the polishing pad is detected. Drive the drive drive mechanism to move the track range and its scratches on the optical disk. Read data from at least the recording surface of the optical disc in a predetermined range near the Smoothly polish to a depth that allows shaving.

[0012]   According to such a configuration, the optical disc device itself is configured so that the recording surface side of the optical disc is The position of the scratch on the surface (range of the track where the scratch exists) is detected, and the scratch on the optical disc is present. For example, the range of the existing track and a predetermined range in the vicinity thereof are set in advance. Since it will be polished to the depth of the Dynamically scratched optical disks can be repaired. Also, the surface of the optical disc Since the polishing is performed within the minimum necessary range, the time required for the polishing process can be shortened. You can

[0013]   According to a third aspect of the present invention, in addition to the second aspect, the arithmetic control unit is further provided. In the range of the track where there is a scratch on the Driven to move the optical pickup in a direction perpendicular to the recording surface of the optical disc. , Data can be normally read from the optical disc by the optical pickup. Optical pickup by the vertical direction optical pickup drive mechanism when it is in a state of The depth of the scratch on the optical disc is estimated from the movement amount of the Calculate and calculate the polishing depth that allows data to be read from the recording surface of the optical disc Grind to the desired depth.

[0014]   According to such a configuration, the optical disc device itself further estimates the depth of the scratch, Data can be read from at least the recording surface of the optical disc based on the estimated scratch depth. The depth of the track where the scratch exists on the optical disk and its vicinity are calculated. The surface of the optical disk will be polished because it will be polished smoothly to the depth calculated in the specified range. By polishing to the minimum required polishing depth, the time required for polishing can be further shortened. Can be shortened.

[0015]   Further, the invention of claim 4 is a rotating machine for rotating an optical disk around its central axis. And a lateral optical pick for moving the optical pickup in the radial direction of the optical disk. Up drive mechanism and the optical pickup perpendicular to the recording surface of the optical disc With a vertical optical pickup drive mechanism that moves the An optical disk device having a polishing function,   Polishing pad with felt impregnated with abrasive and movement of the optical pickup Is provided at a position that does not hinder the polishing of the recording surface side of the optical disc. The polishing pad is brought into contact with the surface of the optical disc on the recording surface side, and A polishing pad drive mechanism for moving a polishing pad in a radial direction of the optical disc; Rotation mechanism, the optical pickup, the horizontal optical pickup drive mechanism, the vertical direction While controlling the optical pickup driving mechanism and the polishing pad driving mechanism, An arithmetic control unit that performs predetermined arithmetic processing using a signal output from the optical pickup, Further equipped with,   The arithmetic control unit drives the rotating mechanism to rotate the optical disc, The lateral optical pickup drive mechanism is driven to move the optical pickup to the optical disc. The signal output from the optical pickup to monitor the signal output from the optical pickup. However, the area of the track on the optical disc where the scratch is present is detected, and the polishing pad is detected. Drive the drive drive mechanism to move the track range and its scratches on the optical disk. The specified area near the After the processing is completed, the rotating mechanism is further driven to rotate the optical disk. , The lateral optical pickup drive mechanism is driven to move the optical pickup to the optical device. Move the disc in the radial direction and monitor the signal output from the optical pickup. While the data on the optical disk is normally recorded from the range of the track where the scratch existed, Judge whether or not the data has been read, and if the data is not read normally, , Again, the range of the track on the optical disc where the scratch exists and a predetermined range in the vicinity of the range. The enclosure is smoothly reground for a predetermined time or depth.

[0016]   With such a configuration, the user does not have to play the polished optical disk. In addition, the optical disc device itself does not estimate the depth of scratches on the optical disc, and The polishing can be repeated until data can be read from the recording surface of the disk. Therefore, the user can be relieved from the trouble of re-polishing.

[0017]   Further, the invention of claim 5 is a rotating machine for rotating an optical disk around its central axis. And a lateral optical pick for moving the optical pickup in the radial direction of the optical disk. Up drive mechanism and the optical pickup perpendicular to the recording surface of the optical disc The vertical optical pickup drive mechanism that moves the An optical disk device having a function of repairing the surface of   A heating mechanism for heating the recording surface side of the optical disc, the rotating mechanism, An optical pickup, the lateral optical pickup drive mechanism, and the vertical optical pickup. Control the drive mechanism and the heating mechanism, and output from the optical pickup. Further comprising a calculation control unit that performs a predetermined calculation process using the signal   The arithmetic control unit drives the rotating mechanism to rotate the optical disc, The lateral optical pickup drive mechanism is driven to move the optical pickup to the optical disc. The signal output from the optical pickup to monitor the signal output from the optical pickup. However, the range of the track on the optical disc where the scratch exists is detected, and the heating mechanism is detected. Drive the optical disk to remove the scratches on the optical disk and the vicinity thereof. The scratched part is smoothed by softening the recording surface side of the optical disk within a certain range. It

[0018]   With such a configuration, the position of the scratch on the recording surface side of the optical disc (the presence of the scratch Track range) to detect the range of the track on which the scratch exists on the optical disk. And a predetermined area in the vicinity of the recording surface of the optical disc by heating with a heating mechanism. Since the surface is softened and the scratched part is smoothed, the user can insert the optical disk into the device once. You can repair a scratched optical disk just by mounting it. Also, Since the softening of the surface of the disc is performed in the minimum necessary range, the time required for heat treatment It can be shortened.

[0019]

[Embodiment of device]   (First embodiment)   FIG. 1 shows the configuration of an optical disk device 1 according to the first embodiment of the present invention. Light de The disc device 1 is for rotating an optical disc 2 such as a CD or a DVD in a predetermined direction. The rotating mechanism 3 and the recording surface of the rotating optical disc 2 are irradiated with light and reflected from the recording surface. A light emitting element for receiving light and reading out the data recorded on the optical disc 2, An optical pickup 4 composed of a light receiving element and a focusing lens, and an optical pickup. A linear motor, for example, for moving the cup-up 4 in the radial direction of the optical disc 2. The horizontal optical pickup moving mechanism 5 and the optical pickup 4 are Consists of a piezoelectric element or the like for moving in the direction perpendicular to the recording surface of the disk 2. The vertical optical pickup drive mechanism 6 is provided.

[0020]   Further, the optical disk device 1 is a polishing pad having a felt impregnated with an abrasive. 7 and a position where the movement of the optical pickup 4 is not hindered, and the optical disc 2 is recorded. When polishing the surface on the recording surface side, the polishing pad 7 is applied to the surface on the recording surface side of the optical disc 2. The polishing pad that moves the polishing pad 7 in the radial direction of the optical disk 2 while contacting A drive mechanism 8 is provided.

[0021]   In the first embodiment, the surface of the optical disk 2 on the recording surface side has only a scratched portion. Instead, the ring is sharpened in the range of the scratched track and the track near it. To be polished. Therefore, the polishing pad drive mechanism 8 does not necessarily move the polishing pad 7 linearly. It is not necessary to move the polishing pad drive mechanism 8 as an arm that pivots horizontally. The polishing pad 7 may be held at the tip of the arm. further, For applying heat or voltage to the arm, such as bimetal or piezoelectric ceramics Therefore, by forming with a deformable material, with a relatively simple configuration and control, The arm can be swung vertically. The surface on the recording surface side of the optical disc 2 is polished When moving, the tip of the arm is raised to bring the polishing pad 7 into contact with the surface of the optical disc 2. Let The polishing pad 7 is a polishing pad impregnated with an abrasive used for polishing. Not only the root part, but also the polishing agent and the polishing that adheres to the surface of the optical disc 2 after polishing. It is designed to have a felt part that is not impregnated with abrasives for removing scraps and the like. May be done.

[0022]   Rotation mechanism 3, optical pickup 4, horizontal optical pickup drive mechanism 5, vertical light The pickup drive mechanism 6 and the polishing pad drive mechanism 8 are respectively provided in the arithmetic control unit 9. They are connected and controlled by the arithmetic control unit 9. The arithmetic and control unit 9 performs predetermined control ROM storing programs, arithmetic processing and judgment processing according to control programs Read from the optical disc 2 by the CPU for executing the It is composed of a RAM or the like for temporarily storing data and the like. Furthermore, arithmetic system In the control section 9, reference data provided by the company that manufactures this optical disk device 1 is used. A reference data storage unit 10 such as a ROM storing (details will be described later) and a predetermined message. A monitor display unit 11 such as a liquid crystal display for displaying messages and information is connected. Has been done.

[0023]   FIG. 2 shows an optical disk 2 having a scratch 2a on the recording surface side. Reference numeral 2 in FIG. b is a protective layer of the optical disc 2, 2c is a reflective layer, and 2d is a track on which data is recorded. Reference numeral 4a denotes a focusing lens of the optical pickup 4. Further, the two-dot chain line shows the case where the reading light is irradiated to the normal portion where the scratch 2a does not exist. The solid line shows the case where the reading light is applied to the portion of the scratch 2a.

[0024]   As is clear from FIG. 2, the read light incident on the portion of the scratch 2a has a concave portion of the scratch 2a. It is refracted irregularly according to the convex shape, for example focusing on the front of the original focus position Therefore, the diffused light reaches the reflective layer 2c of the optical disc 2. Therefore, the light Amount of light reflected by the reflection layer 2c of the disc 2 and returned to the optical pickup 4. Is very small, and it is not possible to distinguish the data as "0" or "1" . Even if the data can be discriminated, the track from which the data should originally be read It is likely that the data is from a different track. Therefore, such a day It is necessary to remove the scratch 2a in order to prevent a data reading error.

[0025]   When the protective layer 2b of the optical disc 2 is polished to be thin, the original focus position is different. Even though the focus is adjusted to the position, even if the focus position is slightly shifted, the data is read from the optical disk 2. In some cases, it can be read. In addition, the optical pickup 4 is recorded on the optical disc 2. A vertical optical pickup drive mechanism 6 is also provided for fine movement in the direction perpendicular to the recording surface. Has been. Therefore, conventionally, the surface of the optical disc 2 having the scratches 2a is polished and the The disk is being repaired. In the first embodiment, the optical disc 2 The optical pickup 4 is moved in the radial direction of the optical disc 2 while rotating the While monitoring the optical signal reflected from the disk 2 and returning, For the distracting track, for example, the distance L2 from the outer circumference of the optical disc 2 and The range L1 is detected, and the range of the detected track and a predetermined range in the vicinity thereof are polished. Polish with a pad 7.

[0026]   FIG. 3 shows the optical disc 2 after the portion having the scratch 2a is polished and repaired. Well-known As shown in the above, only the range of the track where the scratch 2a exists on the surface of the optical disk 2 is Polishing to a specified depth causes a sharp gap between the polished and unpolished areas. A step occurs, and a read error occurs due to the abnormal refraction of the read light at the step. To live. Therefore, not only the track range L1 in which the detected scratch is present, A range L3 including a predetermined range in the vicinity is polished, and the polishing depth is gradually changed. By changing the surface of the optical disc 2 smoothly, This prevents the occurrence of read errors due to refraction.

[0027]   On the other hand, if the protective layer 2b of the optical disc 2 is cut too much above a certain level, the vertical optical pick The up drive mechanism 6 is driven to move the optical pickup 4 vertically to the recording surface of the optical disc 2. Data cannot be read from the optical disc 2 even if it is moved in a certain direction. There is a limit. Therefore, when the depth of the scratch 2a is not less than a certain level, the surface of the optical disc 2 is displayed. Since the surface cannot be repaired by polishing, the surface of the optical disc 2 must be polished. Is useless. Therefore, in the first embodiment, the scratch 2a on the surface of the optical disc 2 is used. The depth D1 of the optical disc 2 is estimated when the depth D1 of the scratch 2a is not less than a certain value. The surface is not polished.

[0028]   A method of estimating the depth of the scratch 2a on the optical disc 2 will be described with reference to FIG. To do. In FIG. 4, the chain double-dashed line indicates, for example, the data from the track where there is no scratch 2a. Position of the focusing lens 4a of the optical pickup 4 when reading Shows the optical path at the time of, and the solid line shows the normal data from the track where the scratch 2a exists. Position of the focusing lens 4a of the optical pickup 4 when reading The optical path at the time of is shown.

[0029]   When the focusing lens 4a of the optical pickup 4 is at the position shown by the chain double-dashed line At this time, as in the case of FIG. 2, the read light incident on the portion of the scratch 2a is recessed in the scratch 2a. It is refracted irregularly according to the convex shape, for example focusing on the front of the original focus position Then, the diffused light reaches the reflection layer 2c of the optical disc 2 and the optical disc 2 Data cannot be read normally. Therefore, the arithmetic control unit 9 causes the optical Vertical optical pickup driving machine while monitoring the signal output from the backup 4. The lens 6 is driven to gradually move the position of the focusing lens 4a of the optical pickup 4. To move. At a position where data can be normally read from the optical disc 2, That is, in FIG. 4, it is indicated by a two-dot chain line of the focusing lens 4a of the optical pickup 4. The movement amount D2 from the position indicated by the solid line to the position indicated by the solid line is detected. And the measured amount of movement By comparing D2 with the reference data stored in the reference data storage unit 10, Thus, the depth D1 of the scratch 2a can be estimated.

[0030]   Here, the reference data will be described. Beforehand, scratches of various depths An optical disk 2 containing 2a is prepared in advance, and the depth D1 of each scratch 2a and the scratch 2a Focus of the optical pickup 4 that can read data from the existing part The relationship with the movement amount D2 of the lens 4a is configured in a look-up table for reference. It is stored in the data storage unit 10. And actually the vertical direction optical pickup drive machine Moving amount of the focusing lens 4a of the optical pickup 4 measured by driving the frame 6. Referring to the reference data using D2, the depth of the scratch 2a corresponding to the movement amount D2 D1 can be estimated.

[0031]   The range L1 of the track on which the scratch 2a exists on the optical disc 2 and the scratch 2a During the process of estimating the depth D1 and polishing the surface of the optical disc 2 by the polishing pad 7. During the process, the rotation speed of the optical disc 2 by the rotation mechanism 3 is changed from that of the normal optical disc 2. It may be slower than the rotation speed at the time of reading the data. In addition, the depth D1 of the scratch 2a In the process of estimating, the rotation of the optical disc 2 may be stopped.

[0032]   Next, the operation of the optical disc device 1 according to the first embodiment will be described with reference to FIG. -Explain with reference to the chart.

[0033]   When polishing the optical disc 2 having the scratch 2a, the optical disc 2 is optically polished. Load it on the rotating mechanism 3 of the device 1 and operate the polishing board selection switch (not shown). It Then, the arithmetic and control unit 9 drives the rotation mechanism 3 so that the optical disc 2 is moved to a predetermined position. Speed (as described above, it is usually different from the rotation speed when reading data from the optical disc 2). It may rotate at a slower speed). In parallel with this, a lateral optical pick The up drive mechanism 5 is driven to move the optical pickup 4 in the radial direction of the optical disc 2. Is started (S1). From the optical pickup 4 to each track of the optical disc 2. Then, the recorded data is sequentially read (S2).

[0034]   The arithmetic control unit 9 determines whether the signal output from the optical pickup 4 is continuous. Is determined (S3). Data is recorded from the portion of the optical disc 2 where there are no scratches 2a. The signals that are normally read and output from the optical pickup 4 are continuous. Only However, in the portion of the optical disc 2 where the scratch 2a exists, the optical pickup is performed as described above. The read light from the optical pickup 4 is not focused on a predetermined track, The output signal is interrupted and discontinuous. Therefore, the arithmetic control unit 9 uses the optical pickup Up to the discontinuous part of the data read out in step 4 Assumed, the position of the track is stored (S4). After memorizing the track position And if it is determined in step S3 that there is no data discontinuity on the track, , The lateral optical pickup drive mechanism 5 to drive the optical pickup 4 to the next track. To move (S5). Judge whether scratches exist on all tracks Steps S2 to S5 are repeated until the end (S6).

[0035]   When the position or range of the track where the scratch 2a exists is specified, the arithmetic control unit 9 The lateral optical pickup driving mechanism 5 is driven to cause the optical pickup 4 to have a scratch 2a. Drive the vertical optical pickup drive mechanism 6 (S7). 4 to monitor the signal output from the optical pickup 4 as shown in FIG. Then, the focusing lens 4a of the optical pickup 4 is moved (S8). So Then, the data could be read from the optical disc 2 by the optical pickup 4. Focusing of the optical pickup 4 by the vertical optical pickup drive mechanism 6 when The depth of the scratch 2a is estimated from the lens 4a (S9).

[0036]   When the depth of the scratch 2 a is estimated, the arithmetic control unit 9 stores the data in the reference data storage unit 10. Whether the reference data exceeds the allowable polishing depth of the optical disc 2 That is, it is determined whether the optical disk 2 can be repaired (S10). Where the scratch If the depth of 2a exceeds the allowable polishing depth of the optical disc 2, it cannot be repaired. If (NO at step S10), it is useless to polish the surface of the optical disc 2. Then, the arithmetic control unit 9 outputs a predetermined signal indicating that the repair is impossible to the monitor display unit 11. , Is displayed on the screen of the monitor display unit 11 (S11).

[0037]   On the other hand, the depth of the scratch 2a does not exceed the allowable polishing depth of the optical disc 2, When it is possible to recover (YES in step S10), the arithmetic control unit 9 estimates the scratch 2a. The depth of polishing the surface of the optical disc 2 is calculated from the depth of A predetermined range in the vicinity of the position or range of the track having the scratch 2a stored in 4 above Is added to determine the range of tracks to be polished (S12). "Predetermined range of neighborhood The "circle" may be constant or may be changed appropriately according to the depth of the scratch 2a. Well The depth of polishing the surface of the optical disc 2 is not necessarily the same as the depth of the scratch 2a or It does not need to be more than that, and even if some scratches remain, the It is sufficient if the data can be read normally.

[0038]   When the polishing range and the polishing depth of the surface of the optical disc 2 are determined, the arithmetic control unit 9 The polishing pad drive mechanism 8 is driven to bring the polishing pad 7 into contact with the surface of the optical disc 2. And the polishing pad 7 is moved in the radial direction of the optical disc 2 within the determined polishing range. The surface of the optical disk 2 on the recording surface side is polished (S13). The light The polishing pad 7 is moved in the radial direction of the optical disc 2 according to the polishing depth of the surface of the disc 2. You may make it reciprocate several times.

[0039]   To determine whether the surface of the optical disc 2 has been polished to a predetermined depth, As a result, the relationship between the polishing time and the polishing depth, which was previously obtained by experiments, was looked up. It is stored in the reference data storage unit 10 in the form of a table and judged by the polishing time. do it.

[0040]   The actual polishing time may vary depending on the material of the protective layer 2b of the optical disc 2 Therefore, there are cases where the relationship between the polishing time and the polishing depth obtained does not follow. After polishing the surface of No. 2 for a predetermined time, the rotation mechanism 3 is driven to rotate the optical disk 2. While driving the lateral optical pickup drive mechanism 5, Move the disk 2 in the radial direction and monitor the signal output from the optical pickup 2. On the other hand, the data is normally recovered from the range of the track on the optical disc 2 where the scratch 2a exists. Judge whether or not the data has been read, and if the data is not read normally, , Again, a predetermined range of the track range where the scratch 2a is present on the optical disk 2 and the vicinity thereof. The range may be configured to polish for a predetermined amount of time or a predetermined depth.

[0041]   Further, as a modification of the first embodiment, steps S7 to S9 are performed. Of the depth of the scratch 2a, whether or not the optical disc 2 can be repaired in step S10 In step S12, the presence of the scratch 2a stored in step S4 is determined. To the position or range of the existing track, add a specified range in its vicinity to The range of the rack is determined, and in step S13, the scratch 2a on the optical disc 2 exists. Until the data can be read normally from the range of the existing track, The polishing of the surface of the optical disc 2 is repeated every time or a predetermined depth. May be. In that case, since the depth of the scratch 2a is not estimated, the scratch 2a is deep and the optical disc Even if it is impossible to repair the tool 2, polishing will be performed, but the actual repair Since deep irrecoverable scratches can be visually determined, the possibility of wasting polishing is low. Yes. On the other hand, since processing such as estimation of the depth of the scratch 2a is not performed, polishing processing is required. The arithmetic processing to be performed becomes simple and the processing time can be shortened.

[0042]   (Second embodiment)   Next, a second embodiment of the present invention will be described. In the first embodiment described above Polishes the surface of the optical disc 2 using the polishing pad 7 and the polishing pad drive mechanism 8. Then, the scratch 2a is removed (see FIGS. 2 and 3) to restore the optical disk 2. However, in the second embodiment, the heating mechanism is used to scratch the optical disk 2. To heat the area where 2a is present to soften the surface and smooth the scratched area. Therefore, the optical disc 2 is restored.

[0043]   FIG. 6 shows the configuration of the optical disc device 1 according to the second embodiment. In addition, shown in FIG. Description of parts common to the first embodiment will be omitted, and parts different from the first embodiment will be omitted. explain about.

[0044]   As can be seen by comparing FIG. 6 with FIG. 1, in the optical disc device 1 according to the second embodiment, At the place where the polishing pad 7 and the polishing pad drive mechanism 8 were provided, And a heating element 13 such as a semiconductor laser constituting the A heating element drive mechanism 12 for moving in the radial direction is provided.

[0045]   The operation of the optical disk device 1 according to the second embodiment is shown in the flowchart of FIG. Show. From step S21 to step S26, the first embodiment shown in FIG. This is the same as steps S1 to S6 in. In the second embodiment Does not polish the surface of the optical disc 2, so that the depth of the scratch 2a is estimated and the depth of the scratch 2a is estimated. Therefore, it is not necessary to judge whether the optical disc 2 can be repaired. Therefore, In step S27, the position of the track on which the scratch 2a stored in step S4 exists or Determines the range of tracks to be heat-treated by adding a predetermined range in the vicinity of the range Then, in step S28, the range of tracks to be heated on the surface of the optical disk 2 The laser light is irradiated for a predetermined time to heat.

[0046]   The irradiation of the laser beam raises the temperature of the surface of the optical disc 2 at that portion, and softens it. When the temperature reaches the point or higher, the protective layer 2b of the optical disc 2 is softened or melted. this At this time, since the optical disc 2 is rotated at a high speed by the rotation mechanism 3, Centrifugal force acts on the softened portion in the vicinity of the scratch 2a, and the softened or melted portion is , Fill the scratch 2a from the side closer to the central axis of the optical disc 2 to the side farther from it. Transforms into. As a result, the scratch 2a on the surface of the optical disc 2 becomes shallow or disappears, Data can be read from the track where the scratch 2a was present.

[0047]   In FIG. 6, the heating element 13 and the heating element driving machine are provided separately from the optical pickup 4. Although the structure 12 is provided, as the light emitting element of the optical pickup 4, the power is cut in two stages. If a replaceable semiconductor laser or the like can be used, the light emitting element of the optical pickup 4 The heating element 13 can also serve as a child and the heating element 13 and is different from the optical pickup 4. Also, the heating element drive mechanism 12 is unnecessary, and the configuration of the optical disk device 1 is simplified. be able to.

[0048]   In addition, in the second embodiment, the surface of the optical disc 2 is heated to be softened, and the scratches 2 However, the surface of the optical disk 2 is softened or melted by applying a solvent. It is also possible to melt and fill the scratch 2a. In that case, the optical disc As the apparatus 1, for example, using the configuration shown in FIG. The pad thus inserted may be mounted on the polishing pad drive mechanism 8. Protection of optical disc 2 Although the material of the layer 2b and the kind of solvent are limited to some extent, The optical disc 2 with the scratch 2a can also be repaired by applying a solvent to the surface. Is.

[0049]

[Effect of device]   As described above, according to the first aspect of the invention, a scratched optical disk is replaced with an optical disk. Just load it into the device and the optical disk device will automatically Detect the range and estimate the depth of scratches to determine whether the optical disc can be repaired Therefore, it is possible to prevent unnecessary polishing processing for an unrepairable optical disc. It If it can be repaired, the presence of scratches should be avoided instead of polishing the entire surface of the optical disk. Depending on the depth of the scratch, only a certain range of the track to be Depth at which data can be read from at least the optical disc (shallow depth In some cases, it will only be polished. The disc can be repaired.

[0050]   According to the invention of claim 2, the optical disc device is loaded with a scratched optical disc. The optical disc device itself automatically detects the range of the scratched track just by filling it. The track area on the optical disk where scratches exist and the specified area near it. , For example, because it grinds smoothly to a preset depth, The optical disc with scratches can be repaired by the polishing process, and the polishing process requires Time can be shortened.

[0051]   According to the invention of claim 3, the optical disc device itself further promotes the depth of scratches. Data read from at least the recording surface of the optical disc based on the estimated scratch depth. It calculates the depth at which scratching is possible, As it polishes smoothly up to the calculated depth in a predetermined range near it, light with scratches Simply load the disc into the optical disc device and the optical disc will be automatically restored. You can

[0052]   According to the invention of claim 4, data can be read from the recording surface of the optical disc. Since polishing is repeated until it becomes possible, the user can play back the polished optical disc. There is no need to check, and the optical disc device itself estimates the depth of scratches on the optical disc. Then, it becomes unnecessary to calculate the polishing depth.

[0053]   Further, according to the invention of claim 5, the range of the track where the scratch exists on the optical disk. And a predetermined range in the vicinity of the recording surface side of the optical disc by heating with a heating mechanism. When the surface of an optical disk is polished, it softens the surface and smoothes the scratches. It is possible to repair a scratched optical disc in the same manner as the case.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an optical disc device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an optical disc having a scratch on its recording surface side.

FIG. 3 is a diagram showing an optical disc after polishing and repairing a scratched portion.

FIG. 4 is a diagram illustrating a method of estimating a scratch depth of an optical disc.

FIG. 5 is a flowchart for explaining the operation of the optical disc device according to the first embodiment.

FIG. 6 is a diagram showing a configuration of an optical disc device according to a second embodiment of the present invention.

FIG. 7 is a flowchart for explaining the operation of the optical disc device according to the second embodiment.

[Explanation of symbols]

1 Optical disk device 2 optical disc 3 rotation mechanism 4 Optical pickup 5 Lateral optical pickup drive mechanism 6 Vertical direction optical pickup drive mechanism 7 polishing pad 8 Polishing pad drive mechanism 9 Arithmetic control unit 10 Reference data storage unit 11 Monitor display 12 Heating element drive mechanism 13 heating element

Claims (5)

[Scope of utility model registration request] 1. A rotating mechanism for rotating an optical disc around its central axis, and a lateral optical pickup driving mechanism for moving an optical pickup in a radial direction of the optical disc.
An optical disk device having a vertical optical pickup drive mechanism for moving the optical pickup in a direction vertical to a recording surface of the optical disk and having a function of polishing the surface of the optical disk, the felt having impregnated felt. A polishing pad, provided at a position that does not hinder the movement of the optical pickup,
A polishing pad drive mechanism for bringing the polishing pad into contact with the surface of the optical disc on the recording surface side and for moving the polishing pad in the radial direction of the optical disc when polishing the surface of the optical disc on the recording surface side; The rotation mechanism, the optical pickup, the lateral optical pickup driving mechanism, the vertical optical pickup driving mechanism, and the polishing pad driving mechanism are controlled, and predetermined arithmetic processing is performed using a signal output from the optical pickup. Reference data that stores the reference data that indicates the relationship between the amount of movement of the optical pickup by the vertical optical pickup drive mechanism and the depth of scratches on the recording surface side of the optical disc, which has been obtained in advance by experiments. A storage unit is further provided, and the arithmetic and control unit drives the rotation mechanism to rotate the optical disc. Meanwhile, the lateral optical pickup driving mechanism is driven to move the optical pickup in the radial direction of the optical disc, and while monitoring the signal output from the optical pickup, the range of the track on which the optical disc has a scratch. In the range of the track where the scratch is present, the vertical optical pickup drive mechanism is driven to move the optical pickup in a direction perpendicular to the recording surface of the optical disc, and the optical pickup causes the optical disc to read Of the scratch depth on the optical disc by comparing the amount of movement of the optical pickup by the vertical optical pickup drive mechanism when normal reading is possible with the reference data stored in the reference data storage unit. And read the data from the recording surface of the optical disc from the estimated scratch depth. It calculates the polishing depth out is possible, when the depth of the scratch on the optical disk is removable by polishing, by driving the polishing pad drive mechanism,
When the scratched area on the optical disk and a predetermined area in the vicinity thereof are smoothly polished to at least the calculated polishing depth, and the scratched depth on the optical disk cannot be removed by polishing, An optical disk device, which outputs a signal indicating that the scratch on the optical disk cannot be repaired. 2. A rotating mechanism for rotating the optical disc around its central axis, and a lateral optical pickup driving mechanism for moving the optical pickup in the radial direction of the optical disc.
An optical disk device having a vertical optical pickup drive mechanism for moving the optical pickup in a direction vertical to a recording surface of the optical disk and having a function of polishing the surface of the optical disk, the felt having impregnated felt. A polishing pad, provided at a position that does not hinder the movement of the optical pickup,
A polishing pad drive mechanism for bringing the polishing pad into contact with the surface of the optical disc on the recording surface side and for moving the polishing pad in the radial direction of the optical disc when polishing the surface of the optical disc on the recording surface side; The rotation mechanism, the optical pickup, the lateral optical pickup driving mechanism, the vertical optical pickup driving mechanism, and the polishing pad driving mechanism are controlled, and predetermined arithmetic processing is performed using a signal output from the optical pickup. An arithmetic control unit for performing the operation, wherein the arithmetic control unit drives the rotation mechanism to rotate the optical disc and drives the lateral optical pickup drive mechanism to move the optical pickup in a radial direction of the optical disc. While monitoring the signal output from the optical pickup, scratches on the optical disc are detected. It is possible to read the data from at least the recording surface of the optical disc, by detecting the range of the track to be driven and driving the polishing pad drive mechanism to read at least the range of the track on the optical disc where the scratch exists and a predetermined range in the vicinity thereof. An optical disk device, which is capable of smoothly polishing to a desired depth. 3. The arithmetic control unit drives the vertical optical pickup drive mechanism to move the optical pickup in a direction perpendicular to a recording surface of the optical disc in a range of a track where a scratch is present, The depth of the scratch on the optical disc is estimated from the moving amount of the optical pickup by the vertical optical pickup driving mechanism when the data can be normally read from the optical disc by the optical pickup, and the estimated depth of the scratch is estimated. 3. The optical disk device according to claim 2, wherein a polishing depth that allows data to be read from the recording surface of the optical disk is calculated, and polishing is performed to the calculated depth. 4. A rotating mechanism for rotating the optical disc around its central axis, and a lateral optical pickup driving mechanism for moving the optical pickup in the radial direction of the optical disc.
An optical disk device having a vertical optical pickup drive mechanism for moving the optical pickup in a direction vertical to a recording surface of the optical disk and having a function of polishing the surface of the optical disk, the felt having impregnated felt. A polishing pad, provided at a position that does not hinder the movement of the optical pickup,
A polishing pad drive mechanism for bringing the polishing pad into contact with the surface of the optical disc on the recording surface side and for moving the polishing pad in the radial direction of the optical disc when polishing the surface of the optical disc on the recording surface side; The rotation mechanism, the optical pickup, the lateral optical pickup driving mechanism, the vertical optical pickup driving mechanism, and the polishing pad driving mechanism are controlled, and predetermined arithmetic processing is performed using a signal output from the optical pickup. An arithmetic control unit for performing the operation, wherein the arithmetic control unit drives the rotation mechanism to rotate the optical disc and drives the lateral optical pickup drive mechanism to move the optical pickup in a radial direction of the optical disc. While monitoring the signal output from the optical pickup, scratches on the optical disc are detected. The range of the tracks to be detected is driven, and the polishing pad drive mechanism is driven to smoothly polish the range of the tracks on the optical disc having scratches and a predetermined range in the vicinity thereof to a predetermined time or a predetermined depth. After the polishing process is completed, the lateral optical pickup driving mechanism is driven to move the optical pickup in the radial direction of the optical disc while further driving the rotating mechanism to rotate the optical disc. While monitoring the signal output from the optical disc, it is judged whether or not the data is normally read from the range of the track on which the scratch is present on the optical disc, and when the data is not normally read, the data is read again. Smoothly re-polish the range of the scratched track on the optical disk and the specified range in the vicinity of it to a specified time or a specified depth. An optical disk device characterized by the following. 5. A rotation mechanism for rotating the optical disc around its central axis, and a lateral optical pickup drive mechanism for moving the optical pickup in the radial direction of the optical disc.
An optical disk device comprising a vertical optical pickup drive mechanism for moving the optical pickup in a direction perpendicular to a recording surface of the optical disk, and having a function of repairing a surface of a scratched optical disk, A heating mechanism for heating the surface on the side of the surface, controlling the rotating mechanism, the optical pickup, the lateral optical pickup driving mechanism, the vertical optical pickup driving mechanism and the heating mechanism, and outputting from the optical pickup. An arithmetic control unit that performs a predetermined arithmetic process using a signal is further provided, and the arithmetic control unit drives the rotation mechanism to rotate the optical disc, and drives the lateral optical pickup drive mechanism to drive the optical pickup. Move the pickup in the radial direction of the optical disc to monitor the signal output from the optical pickup. However, the range of the track on the optical disc where the scratch exists is detected, the heating mechanism is driven, and the range of the track on the optical disc where the scratch exists and the recording surface of the optical disc in a predetermined range in the vicinity thereof. An optical disk device characterized by softening the surface on the side to smooth the scratched portion.