JP2006313581A - Optical disk recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out detection efficiently in terms of time and power, while securing a reliability in the detection of dirt and defect of an optical recording/reproducing device, by changing a resolution of detection in relation to a structure or condition of an optical disk recording medium, or the using state of the device. <P>SOLUTION: When the dirt and defect are detected with respect to the disk 101, a recording surface of the part to be detected of the optical disk is recognized whether it is already recorded or unrecorded, by using a recording state recognizing means 109, and the detection is swiftly carried out for the already recorded area by lowering the resolution of detection, while the unrecorded area is detected by increasing the resolution of detection. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for detecting dirt and defects on a disc in an optical disc recording / reproducing apparatus.

    Patent Document 1 discloses a method called a replacement process in which dirt and defects are detected and an area that cannot be normally read and written is not recorded and data is written in another recording area called a replacement area to maintain the normality of operation. In addition, when there is dirt on the disk recording surface that prevents data or addresses from being read or written, measures such as prompting the user to clean the disk recording surface can be used to prevent malfunction of optical disk recording / playback. There exists patent document 2.

Japanese Patent No. 3040779 Japanese Patent Laid-Open No. 2001-160216

  As large-capacity data recording media, optical disc recording / playback apparatuses such as CD (Compact Disc) and DVD (Digital Versatile Disc) have been developed and widely used from PC use to AV (Audio-Visual) use.

  In a large-capacity optical disk apparatus, digitized data is recorded on an optical disk in a minute unit of 1 μm or less, and it is required to record or reproduce these accurately.

  However, with an optical disc that can be taken out from the device and managed, fingerprints adhere to the disc recording surface by directly touching the disc, or dust adheres to the disc recording surface by leaving the disc alone. It is assumed that

  As described above, since it is necessary to read and write very fine data accurately on an optical disc, there is a concern that normal reading and writing operations cannot be performed when such dirt is attached.

  In the above-described method, since contamination and defects are detected by reading and writing data or addresses, detection is performed in units of data. When the capacity of the disk increases, the time required for detecting the entire disk surface and power consumption are correspondingly increased. growing.

  For large dirt or defects such as fingerprints, it is possible to detect a certain amount of light by simply detecting the amount of reflected light from the disk on one side without finely detecting in units of data.

  However, since these detections are performed uniformly with the same resolution on the entire surface of the disk, a certain detection time and electric power are required regardless of the use state of the disk and the apparatus.

  In actual use, a disc that has a structure that is difficult to get dirty due to the surface coating of the disc media, or that does not require much attention to dirt or defects due to the user's attention, or conversely, a disc that is vulnerable to defects or dirt. Depending on the medium and the environment in which the device is used, special consideration must be given to defects and contamination.

  For this reason, it is inefficient to use a uniform defect detection method in all cases, saving time and power required for detection, and determining sufficient detection resolution according to the situation to ensure efficient detection. It is necessary to do.

  An object of the present invention is to provide an efficient detection method by controlling the resolution of detection in relation to the state of an optical disk medium and an optical disk recording / reproducing apparatus when detecting dirt and defects in the optical disk recording / reproducing apparatus. Thus, an object of the present invention is to provide an optical disc recording / reproducing apparatus that reduces the time and power required for detection and suppresses the heat generation associated therewith.

  In an optical disk recording / reproducing apparatus capable of detecting dirt and defects, information on the usage status of the optical disk medium and the optical disk recording / reproducing apparatus is obtained, and the resolution in detecting dirt and defects is controlled based on the obtained information. The main feature is to perform detection.

  The optical disc recording / reproducing apparatus of the present invention can perform more efficient detection in accordance with the state of use in detecting dirt and defects on the optical disc.

  Examples of the present invention will be described below.

  FIG. 1 is a block diagram showing an embodiment of an optical disk recording / reproducing apparatus according to the present invention.

  In FIG. 1, 101 is an optical disk as a recording medium, 102 is an optical head, 103 is a spindle motor that rotates the optical disk, 104 is a servo control means, 105 is a means for reproducing information recorded on the optical disk, and 106 is a defect. Means for detecting, means 107 for controlling the system, 108 a feed motor for moving the optical head in the radial direction of the optical disk, and 109 means for discriminating unrecorded on the disk recording surface.

  It is assumed that data is recorded from the inner circumference side of the 101 disc to the middle of the disc, and an unrecorded area exists on the outer circumference side. As for the recording state of the disc, there may be a structure in which the recorded area is on the outer peripheral side and the unrecorded area is on the inner peripheral side, and there is no problem even if a plurality of recorded areas and a plurality of unrecorded areas are mixed. The optical disk 101 is irradiated with laser light from the optical head 102, and a recording state discriminating means 109 discriminates the recording / unrecorded state of the disk recording surface at the laser spot irradiation position from the electric signal indicating the reflected light. Here, in order to determine whether recording has not been performed, the information recorded in the management information of the disc may be reproduced by using 105 reproducing means. When the detection of the dirt and the defect is started, the control unit 107 sets the detection resolution based on the acquired data on the unrecorded state of the disc. The control means 107 sets a detection threshold value for the defect detection means 106, or sets the rotation speed of the spindle motor 103 and the moving speed of the optical head by the feed motor 102 for the servo control means 104. This sets the detection resolution.

  During the dirt and defect detection operation, a defect is detected by the defect detection means 106 using a signal from the optical head 102. In addition, during the detection operation during the detection by the discriminating means 109, the unrecorded state of the recording surface of the light spot position is simultaneously detected, and the scanning position of the laser spot is changed from the recorded area to the unrecorded area, or Conversely, when it is detected that the area has changed from the unrecorded area to the recorded area, the control means 107 sets the resolution of detection by the above-mentioned means. Show. In this way, detection is performed by controlling the resolution between the unrecorded area and the recorded area.

  Next, an example of the mechanism of resolution control in the detection of dirt and defects according to the present invention will be described.

  In FIG. 2, 201a, 201b, 201c, and 201d are optical discs, and in (a), (b), (c), and (d), the broken lines 202, 203, 204, and 205 scan the light spot for contamination and defects, respectively. The locus of light spot scanning during detection is shown. In (d), the area indicated by hatching 206 indicates the recorded area on the disk recording surface, and the area other than the hatched area of the optical disk indicated by 201d is not recorded.

  For the trajectories as indicated by 202, 203, 204, and 205, a light spot is linearly scanned on the rotating disc from the inner circumference side to the outer circumference side of the disc in the radial direction of the disc. The trajectory through which the spot passes becomes a spiral as shown in the figure.

  If (a) in FIG. 2 is the locus of the light spot when the detection is performed with the resolution for detecting normal dirt and defects, the locus indicated by 203 in (b) has a smaller spiral width and is smaller. Since the dirt or the defect can be detected, the detection resolution is high. Conversely, in (c), the resolution of the detection is low because the width of the spiral of the locus indicated by 204 is wide.

  The method for detecting dirt and defects may not be as described above, and the rotation direction of the optical disk is reversed, the direction of movement of the optical head is reversed, or the rotation of the disk and the movement of the optical head are accompanied. May be.

  In FIG. 2 (d), in the first embodiment shown in FIG. 1, the detection of the recorded area is controlled to be lower than the resolution of the detection of the unrecorded area, and the stain and the defect are detected. At this time, in the recorded area on the inner periphery of the disk, which shows the trajectory of scanning the light spot on the optical disk, detection is performed with the same resolution as in FIG. 2C, and in the unrecorded area on the outer periphery of the disk, FIG. Detection is performed with the same resolution.

  FIG. 3 illustrates the resolution and the time required for detection of dirt and defects in the method illustrated in FIG. 2 in relation to the moving speed of the optical head and the rotational speed of the optical disk.

  In FIG. 3, an arrow 301 indicates a change in the disk rotation speed, and the rotation speed increases as it advances to the right. Reference numeral 302 denotes a change in the speed at which the optical head moves with respect to the radial direction of the optical disk, and indicates that the moving speed increases as it goes to the lower left. Each point of 304, 305, 306, 307, 308, and 309 rotates the optical disk at a certain rotation speed, and at the same time moves the optical head from the inner periphery to the outer periphery at a certain movement speed. The resolution and the time required for detection are shown. The point 304 indicates the resolution and the time required for detection when detection is performed with normal parameters. The locus of the light spot at this time is as shown in FIG.

  Here, if the rotational speed of the optical disk is kept constant and the moving speed of the optical head is increased, the detection parameter changes from the point 304 to the point 303, the time required for detection decreases, and the detection resolution decreases. The trajectory of the movement of the light spot in the detection at that time is as shown in FIG. Conversely, if the rotational speed of the optical disk is kept constant and the moving speed of the optical head is slowed down, the detection parameter changes from point 304 to point 305, and the time required for detection increases, but the detection resolution increases. Sometimes the locus of movement of the light spot corresponds to (b) of FIG. As described above, the control of the resolution only by the moving speed of the optical head requires more time if detection is performed with a high resolution.

  Next, if the rotation speed of the optical disk is increased while the moving speed of the optical head remains constant, the detection parameter changes from the point 304 to the point 307, and the detection resolution can be increased while maintaining the detection time. At this time, the locus of the light spot at the time of detection is a locus as shown in FIG. Conversely, the resolution of detection can be lowered by slowing the rotational speed of the optical disk while keeping the moving speed of the optical head constant. By controlling the rotation speed of the optical disk, the resolution can be controlled without changing the time required for detection. However, if the rotation speed of the optical disk is frequently changed, power consumption and time consumption increase. It is efficient to control the resolution of detection by using both the control of the moving speed of the head and the rotation speed control of the optical disk.

  FIG. 4 is a block diagram showing the configuration of the second embodiment of the optical disk recording / reproducing apparatus according to the present invention.

  In FIG. 4, 401 is an optical disk serving as a recording medium, 402 is an optical head, 403 is a spindle motor that rotates the optical disk, 404 is servo control means, 405 is means for reproducing information recorded on the optical disk, and 406 is a defect. Means for detecting; 407, means for controlling the system; 408, a feed motor for moving the optical head in the radial direction of the optical disk; 409, means for detecting the position of the optical head; 410, recorded on the optical disk It is a means for recognizing the type of information.

  The optical head of 402 irradiates the optical disc medium of 401 with laser light, reads the portion of the management information recorded on the optical disc that indicates the position of the information recorded on the disc on the disc, and reproduces 405 The means for recognizing and recognizing the type of information 410 divides this information into management information and data information, and recognizes their recorded areas. Since data is recorded spirally or concentrically on the recording surface of the 401 optical disk, when the area of the optical disk is divided by the recorded data, the divided area becomes an area concentric with the circular shape of the disk. . Since the optical head 402 moves linearly in the radial direction of the disk, the relationship between the position of the optical head and the area divided by the area dividing means is determined by the position of the optical head in the radial direction of the disk. Here, when recognizing the area where the management information and data information in the disc are recorded, the data structure of the information to be recorded on the disc is determined in advance according to the disc standard or the device specification without reading the management information. If so, you may refer to it.

  In the same manner as in the first embodiment, the control unit 407 drives the spindle motor 403 via the 404 servo control unit to rotate the disk, and the optical head 402 is moved from the inner circumference to the outer circumference by the 408 feed motor. , The laser return light reflected by the disc 401 is detected by the laser beam from the optical head, and the defect detection means 406 is used. The direction of movement of the optical head 402 may not be the same as this, may be the reverse direction, or may be folded back. As in the first embodiment, the resolution is set by controlling set values for the 404 servo control means, the 403 spindle motor, the 408 feed motor, and the 406 defect detection means.

  During the dirt and defect detection operation, the optical head position detecting means 409 detects the amount of movement of the optical head 402 from the initial position in the radial direction of the disk by monitoring the drive of the 408 feed motor, and scans it. Recognize the position of the light spot on the optical disc. Here, the method of detecting the position of the optical head of the optical head position detection means 409 may be a method of directly measuring the position of the optical head by using a sensor, instead of monitoring the feed motor 408. . The control means 407 includes the positions of the light spot detected by the optical head position detection means 409 and the management information recording area and the data information recording area recognized by the means 410 for recognizing the type of recording information. Browse for information. When the position of the optical head detected by 409 is the area where the management information is recorded, the recording data of the part where the stain and the defect are performed is the management information, and the importance as the management information data is high. The resolution in detecting dirt and defects in this region is set high.

  With the same configuration, the recording area and the unrecorded area of the disc may be detected from the management information of the disc, and detection may be performed by setting a high resolution for detecting dirt and defects in the unrecorded area.

  FIG. 5 is a block diagram showing the configuration of the third embodiment of the optical disk recording / reproducing apparatus according to the present invention.

  In FIG. 5, 501 is an optical disk as a recording medium, 502 is an optical head, 503 is a spindle motor that rotates the optical disk, 504 is a servo control means, 505 is a means for reproducing information recorded on the optical disk, and 506 is a defect. Means for detecting, means 507 for controlling the system, 508 for a feed motor for moving the optical head in the radial direction of the optical disk, and 509 for means for discriminating the structure of the optical disk medium.

  The optical head of 502 irradiates laser light to the optical disk medium of 501 and reads information indicating the structure of the medium among the management information recorded on the optical disk. The discriminating means of 509 determines the structure of the optical disk medium from the read information. Is determined. When recognizing the structure, the structure may be determined from the change in reflected light when the focus of the optical head 502 is changed and the depth of focus is changed without reading the management information.

  Regarding the structure of the optical disk, for example, an optical disk medium having a plurality of recording surface layer structures on one side of the optical disk has to be focused with high accuracy by selecting a plurality of layers. Even if it has a big impact. Also, optical disk media with a structure that does not have a hard coat to prevent scratches and dirt on the disk surface, optical disk media with recording surfaces on both sides of the disk, etc., when the user touches the disk when inserting or removing the disk, There is a high possibility of attaching a fingerprint. In addition, for high-recording disk media such as next-generation optical disks that perform recording and playback using a blue laser diode, recording and playback must be performed with finer precision. It is necessary to pay attention. Accordingly, the disc medium having the structure as described above is discriminated by the discriminating means 509, and the control means 507 sets the resolution higher than usual when performing defect detection according to the recognized disc medium structure. Here, the means for increasing the resolution is set for one or more of the spindle motor 503, the servo control means 504, the feed motor 508, and the defect detection means 506 as in the first embodiment. Realize by doing.

  In the same manner as in the first embodiment, the detection of dirt and defects is performed by the control means 507 driving the spindle motor 503 via the servo control means 504, and the optical head 502 from the inner circumference to the outer circumference by the feed motor 508. Scanning can be performed using the defect detection means 506 from the laser return light detected by the optical head.

  FIG. 6 is a block diagram showing the configuration of the fourth embodiment of the optical disk recording / reproducing apparatus according to the present invention.

  In FIG. 6, 601 is an optical disk as a recording medium, 602 is an optical head, 603 is a spindle motor that rotates the optical disk, 604 is a servo control means, 605 is a means for reproducing information recorded on the optical disk, and 606 is a defect. Means for detecting, 607 means for controlling the system, 608 is a feed motor for moving the optical head with respect to the radial direction of the optical disk, and 609 is where the light spot is in the radial direction of the optical disk from the position of the optical head 610 is a storage means, and 611 is a means for statistically judging the area where dirt is easily detected and the area where it is difficult to detect from the data accumulated in the storage means.

  The storage means 610 stores the detection results of the past several times of detection of dirt and defects and the positional information data of the detected dirt and defects on the disk. The information stored in 610 may be the size or darkness of the detected dirt or defect. When there is no past detection result data in the storage means 610, stains and defects are detected with normal resolution. A case where past detection result data is stored in the storage means 610 will be described below. When performing stain and defect detection, the statistical judgment means 611 divides the recording area of the disk into a plurality of zones in the radial direction of the disk, and from the storage means 610, the number of detections in the past dirt and defect detection and the optical disk Referring to the relationship with the position in the radial direction, information on the number of times of past contamination and defect detection for each zone on the disk is obtained.

  Further, the determination unit 611 determines the detection resolution from the acquired information on the number of times of detection of the past dirt and defect zones. In determining the detection resolution, if the number of past contaminations and defects detected for each zone is less than the arbitrary threshold A1, the detection resolution is lowered, and if it is greater than the threshold A2, the detection resolution is increased. . For determining the resolution, a value corresponding to the value of the past detection probability may be set instead of discrimination based on the thresholds A1 and A2.

  As in the first embodiment, the detection unit 607 drives the spindle motor 603 via the servo control unit 604, scans the optical head 602 from the inner circumference to the outer circumference by the feed motor 608, and detects the light. From the laser return light detected by the head, the defect detection means 606 is used. As in the first embodiment, the resolution is set by controlling the set values for the servo control means 604, the spindle motor 603, the feed motor 608, and the defect detection means 606. During the dirt and defect detection operation, the optical head position detection means 609 detects the amount of movement from the initial position of the optical head 602 relative to the radial direction of the optical disk by monitoring the drive of the feed motor 608, and performs scanning. The position of the light spot in the radial direction of the optical disk is recognized. Here, the method of detecting the position of the optical head of the optical head position detection means 609 may not be a method of monitoring the feed motor 608 but may be a method of directly measuring the position of the optical head by using a sensor. . When the control means of 607 recognizes that the position of the light spot detected by the optical head position detection means of 609 has moved to another zone divided by the statistical judgment means of 611, the determination means of 611 Set by referring to the detection resolution for each zone set by.

  When dirt or a defect is detected during the detection operation by the defect detection means of 606, the control means of 607 refers to the position information of the optical head from the optical head position detection means of 608, and the storage means of 610 Is recorded as a detection result. This detection result recording operation may be performed during the detection operation, or may be performed collectively at the end of the detection. At this time, a new detection result may be recorded, and the oldest detection result data existing in the storage unit 610 may be deleted.

  FIG. 7 is a block diagram showing the configuration of the fifth embodiment of the optical disc recording / reproducing apparatus according to the present invention.

  In FIG. 7, 701 is an optical disk as a recording medium, 702 is an optical head, 703 is a spindle motor that rotates the optical disk, 704 is a servo control means, 705 is a means for reproducing information recorded on the optical disk, and 706 is a defect. Means for detecting, means 707 for controlling the system, 708 is a feed motor for moving the optical head with respect to the radial direction of the optical disk, 709 is a sensor for acquiring external temperature information, 710 is information from the sensor It is a means for judging the detection resolution.

  In the same manner as in the first embodiment, dirt and defects are detected by irradiating laser light onto the optical disk 701 by the optical head 702, rotating the optical disk by the spindle motor 703, and rotating the optical disk 702 by the feed motor 708. Is driven in the radial direction of the optical disc to scan the laser spot irradiated on the optical disc. The reflected light from the optical disk is observed, and the defect detection means 706 observes the increase / decrease in the reflected light to detect the defect.

  Before performing the detection, temperature information around the device is acquired by the sensor 709, and the resolution determination unit 710 determines that the acquired temperature information is higher than an arbitrary threshold value B1. It is determined that dirt is likely to hit the disc, and information is transmitted to the control means 707 so that the detection resolution is set high. In order to increase the resolution in detection, the control means 707 increases the rotational speed of the spindle motor 703 or slows the moving speed of the optical head 702 via the servo control means 704 as in the first embodiment. Or a setting is made to lower the defect detection threshold in the defect detection means 706. Here, the sensor 709 is a sensor for obtaining temperature information. However, the environmental information to be acquired may be humidity, ambient light, or weather information. It is not a means for acquiring environmental information directly, but environmental information from an external network. Means for acquiring the data may be used. In addition, the opportunity for acquiring the environmental information may be when the optical disk is inserted or removed from the apparatus, or immediately before the detection is performed.

  FIG. 8 is a block diagram showing the configuration of the sixth embodiment of the optical disk recording / reproducing apparatus according to the present invention.

  In FIG. 8, 801 is an optical disk to be a recording medium, 802 is an optical head, 803 is a spindle motor that rotates the optical disk, 804 is a servo control means, 805 is a means for reproducing information recorded on the optical disk, and 806 is a defect. Means for detecting, 807 means for controlling the system, 808 is a feed motor for moving the optical head with respect to the radial direction of the optical disk, 809 is a sensor for measuring the humidity of the user's skin, 810 is from the sensor It is a means for judging the detection resolution in relation to information.

  As the apparatus of the present invention, the sensor 809 in FIG. 8 is in a position where the user naturally touches the apparatus during normal use. In the case of the camcorder as shown in FIG. 9, the camcorder 901a shown in FIG. Then, if there is a sensor at the position of the shaded portion of 902a, the user's hand of 903 will contact the sensor portion indicated by the shaded portion of 902b when used with one hand as shown in FIG. 9B. Detection can be performed without the user's awareness. The application of the present invention is not limited to the camcorder, but it is effective to install the sensor at a position where the hand can be naturally touched, such as a portable device such as the camcorder of FIG. 9 or a remote controller. The user may be required to touch the sensor unit at the time of detection, or the device configuration may be such that the sensor is attached to the stationary device body.

  In the same manner as in the first embodiment, the 802 optical head irradiates laser light on the 801 optical disk, and the optical disk rotation by the 803 spindle motor and the 802 optical head by the 808 feed motor are performed. Is driven in the radial direction of the optical disc to scan the laser spot irradiated on the optical disc. The reflected light from the optical disk is observed, and the defect detection means 806 observes the increase / decrease in the reflected light to detect the defect.

  Prior to detection, information on the humidity of the skin of the user of the apparatus is acquired by the sensor 809. When the acquired skin humidity information is higher than an arbitrary threshold value C1, the resolution determination unit 810 determines that dirt due to sweat of the user of the apparatus is likely to hit the disc, and sets the detection resolution high. As described above, information is transmitted to the control means 807. In order to increase the resolution in detection, the control means 807 increases the rotational speed of the spindle motor 803 or slows the moving speed of the optical head 802 via the servo control means 804 as in the first embodiment. Or setting so as to lower the defect detection threshold in the defect detection means 806.

  Here, the sensor 809 is a sensor for obtaining information on the dry state of the skin, but the information to be obtained may be body temperature, body fat, heart rate, blood pressure. In addition, the opportunity to acquire the user's physical information may be when the optical disk is inserted or removed from the apparatus, or may be immediately before detection.

(Example 1) which is the explanatory drawing which showed the implementation method of the optical disk recording / reproducing apparatus characterized by controlling the resolution | decomposability of the detection of dirt and a defect in relation to the recording state of an optical disk It is explanatory drawing which showed the locus | trajectory in which the light spot at the time of performing a stain | pollution | contamination and a defect detection scans on an optical disk. It is explanatory drawing which showed the resolution | decomposability and detection time of a stain | pollution | contamination and defect detection in relation to the rotational speed of a spindle motor, and the moving speed of an optical head. (Example 2) which is the explanatory diagram which showed the implementation method of the optical disk recording / reproducing apparatus characterized by controlling the resolution | decomposability of the detection of a stain | pollution | contamination and a defect in relation to the classification of the information recorded on the optical disk (Example 3) which is the explanatory drawing which showed the implementation method of the optical disk recording / reproducing apparatus characterized by controlling the resolution | decomposability in the detection of a stain | pollution | contamination and a defect regarding the structural characteristic of an optical disk medium (Example 4) It is explanatory drawing which showed the implementation method of the optical disk recording / reproducing apparatus characterized by controlling the resolution | decomposability of the detection of dirt and a defect in relation to the information of the detection result of the past dirt and defect stored. ) (Example 5) which is the explanatory diagram which showed the implementation method of the optical disk recording / reproducing apparatus characterized by controlling the resolution | decomposability in the detection of dirt and a defect in relation to the temperature information around the apparatus (Example 6) which is the explanatory drawing which showed the implementation method of the optical disk recording / reproducing apparatus characterized by controlling the resolution | decomposability in the detection of a stain | pollution | contamination and a defect regarding the humidity of a user of an apparatus Overview of example camcorder with sensor

Explanation of symbols

101, 201a, 201b, 201c, 201d, 401, 501, 601, 701, 801 ... optical disc medium,
102, 402, 502, 602, 702, 802 ... optical head,
103, 403, 503, 603, 703, 803… Spindle motor,
104, 404, 504, 604, 704, 804 ... Servo control means,
105, 405, 505, 605, 705, 805 ... reproducing means,
106, 406, 506, 606, 706, 806 ... defect detection means,
107,407,507,607,707,807 ... control means,
108,408,508,608,708,808 ... feed motor,
109… means for recognizing the recording status,
202, 203, 204, 205 ... Light spot locus at the time of detection of dirt and defects,
206… unrecorded area,
301… disk rotation speed change,
302… Changes in optical head moving speed,
303, 304, 305, 306, 307, 308 ... Points indicating the required time and detection resolution in the detection of dirt and defects,
409, 609 ... means for detecting the position of the optical head,
410… means of recognizing the area of information,
509 ... means for determining the media structure,
610… storage means,
611… means for statistically determining resolution,
709… A sensor that measures the temperature around the device,
710 ... Means to determine environmental information around the device,
809 ... Sensor for measuring the skin humidity of the device user,
810… A means to determine the physical characteristics of the device user.

Claims (14)

An optical disk recording / reproducing apparatus having a dirt detecting means for detecting a dirt or a defect by applying a light spot from an optical head to an optical disk recording surface,
Comprising at least one detection means of a first detection means for detecting the structure of the optical disc, a second detection means for detecting the state of the optical disc, or a third detection means for detecting the use environment of the apparatus,
An optical disc recording / reproducing apparatus comprising: means for controlling the resolution of the dirt detecting means based on a detection result from at least one of the first to third detecting means. The optical disk recording / reproducing apparatus according to claim 1,
The means for controlling the resolution controls the resolution by switching at least one of a moving speed at which the optical head moves in the radial direction of the optical disk, a rotational speed of the optical disk, and a detection sensitivity of dirt or a defect. Optical disc recording / reproducing apparatus. The optical spot is divided into a plurality of concentric areas depending on the state of the data recording surface, the contamination detecting means for detecting the contamination or defect by applying a light spot from the optical head to the optical disk recording surface, the position detecting means for detecting the position of the optical head. An optical disc recording / reproducing apparatus having a dividing means,
An optical disk recording / reproducing apparatus comprising: means for controlling the resolution of the dirt detecting means based on information on where the optical head is located in an area divided on the data recording surface by the optical head position detecting means. An optical disc recording / reproducing apparatus according to claim 3,
The area dividing means divides the area by the recording area of management information and the recording area of data information of the optical disc, and divides the area by recording and non-recording of the data recording surface of the optical disc. An optical disc recording / reproducing apparatus characterized by the above. An optical disc recording / reproducing apparatus having a stain detection means for detecting a stain or a defect by applying a light spot from an optical head to an optical disc recording surface and a recording state discriminating means for discriminating between recorded and unrecorded data recording surfaces of the optical disc There,
An optical disk recording / reproducing apparatus, wherein the resolution of the dirt detecting means is controlled by the recording state of the data recording surface acquired by the recording state determining means. The optical disk recording / reproducing apparatus according to claim 1,
The first detection means has no layer structure for preventing contamination on the data recording surface of the optical disc, has a data recording surface on both sides of the optical disc, and has a layer structure having a plurality of data recording surfaces on the optical disc. An optical disc recording / reproducing apparatus for detecting at least one of the above, wherein the resolution control means sets the resolution of the dirt detection means high according to the detection result of the first detection means. . An optical disk recording / reproducing apparatus having a dirt detecting means for detecting a dirt or a defect by applying a light spot from an optical head to an optical disk recording surface,
An optical disc recording / reproducing apparatus comprising storage means for storing the detection result of the dirt detection. The optical disc recording / reproducing apparatus according to claim 7,
An optical disc recording / reproducing apparatus comprising: a detecting unit that statistically detects a characteristic of a dirty state from a detection result of the dirty detection stored in the storage unit. An optical disc recording / reproducing apparatus according to claim 8,
An optical disc recording / reproducing apparatus comprising: means for controlling a resolution of the dirt detection means in relation to a result of dirt condition feature detection by a detection means for detecting a dirt condition feature. An optical disc recording / reproducing apparatus according to claim 7, or claim 8 or claim 9,
The storage means stores at least one of the detected position of the dirty optical disk on the data recording surface, the size of the detected dirt, and the detected darkness of the optical disk. Playback device. An optical disk recording / reproducing apparatus having a dirt detecting means for detecting a dirt or a defect by applying a light spot from an optical head to an optical disk recording surface,
An optical disc recording / reproducing apparatus comprising: means for detecting an environmental condition around the optical disk recording / reproducing apparatus; and means for controlling a resolution of the dirt detecting means based on a detection result of the environmental condition. An optical disc recording / reproducing apparatus according to claim 11,
The optical disk recording / reproducing apparatus, wherein the environmental state detecting means detects at least one of a temperature state, a humidity state, an ambient light state, an ultraviolet content, and a weather state. An optical disk recording / reproducing apparatus having a dirt detecting means for detecting a dirt or a defect by applying a light spot from an optical head to an optical disk recording surface,
An optical disc recording / reproducing apparatus comprising: a state detecting unit that detects physical information, and controlling the resolution of the dirt detection in relation to the detected physical state. An optical disc recording / reproducing apparatus according to claim 13,
The state detection means acquires information on at least one of a dry state of the skin, a body temperature state, a blood pressure state, a heart rate state, and a body fat percentage state, and the stain detection means is based on the acquired result. An optical disc recording / reproducing apparatus characterized by controlling the resolution of the recording medium.

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