JP2008165886A - Optical disk device, optical disk recording/reproducing method, optical disk recording/reproducing program, and recording medium storing the program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent interruption of reproducing/recording by suppressing the temperature rise of an optical pickup during optical disk reproducing/recording. <P>SOLUTION: In ripping from an optical disk 14 to a hard disk 10 in the optical disk recording/reproducing device 1, when the temperature of an optical pickup 3 reaches a threshold value T1 lower than an operation upper limit temperature, ripping is carried out from a predetermined position of the outer periphery of the optical disk 14 capable of maintaining a temperature lower than that of the point of ripping after the current ripping position is stored. When the temperature of the optical pickup 3 reaches a threshold value T2 lower than the threshold value T1, the ripping is restarted from the storing position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus for reproducing or recording an optical disc, an optical disc recording / reproducing method, an optical disc recording / reproducing program, and a recording medium storing an optical disc recording / reproducing program.

  A recording / reproducing apparatus that reproduces information recorded on an optical disc or records information on an optical disc uses an optical pickup equipped with a laser diode, an objective lens, and the like from an optical disc that is rotationally driven by a spindle motor. Information is read or written by moving in the radial direction of the optical disk.

  When an optical disk is rotationally driven by a CLV (constant linear velocity) control method, generally, the inner circumference of the optical disk is closer to a heat source such as a spindle motor or a carriage motor, or the rotational speed of the spindle motor is increased. In addition, the temperature of the optical pickup tends to be higher than that of the outer periphery due to increased heat generation.

Conventionally, when the temperature of the optical pickup increases, the light emission characteristics of the laser diode deteriorate, and when the temperature reaches a predetermined temperature, the laser diode is turned off to stop reproduction or recording. For example, in Patent Document 1, reproduction or recording is stopped when the temperature of the optical pickup reaches a high temperature side threshold, and the optical pickup is moved to the outermost periphery of the optical disk, and reproduction or recording is performed when the optical pickup reaches the low temperature side threshold. A restarting method of cooling the optical pickup is described.
JP 2006-107636 A

  However, in the optical disk device described in Patent Document 1, reproduction or recording stops when the temperature of the optical pickup reaches the high temperature side threshold value. Therefore, reproduction or recording is performed until the temperature of the optical pickup reaches the low temperature threshold value. I could not.

  In recent years, an operation called ripping, in which information recorded on an optical disk is rotated at a speed higher than the reproduction speed, read and compressed, and recorded on a hard disk or the like at high speed, is often performed. Since the optical disk is rotated at a high speed, the temperature of the optical pickup tends to rise. The method of Patent Document 1 has a problem that the ripping operation takes time because reading of information from the optical disc is interrupted during the ripping operation.

  Therefore, the present invention provides, for example, an optical disc apparatus, an optical disc recording / reproducing method, an optical disc recording / reproducing program, and an optical disc recording / reproducing program in which an increase in the temperature of an optical pickup during optical disc reproduction or recording is suppressed and reproduction or recording is not interrupted. It is an object to provide a medium.

  In order to solve the above-described problem, an optical disc apparatus according to claim 1 includes a driving unit that rotationally drives an optical disc on which information is recorded, an optical pickup that reads or writes information from the optical disc, and the optical pickup includes: An information reproducing means for reproducing the read information or an information recording means for converting the inputted information into a method for recording the information on the optical disc, and when the information is continuously read from or written to the optical disc Alternatively, in an optical disc apparatus in which the temperature of the optical pickup differs depending on the position where writing is performed, temperature measuring means for measuring the temperature of the optical pickup, and when the optical pickup is reading or writing information from the optical disc The temperature measured by the temperature measuring means is the optical peak. A predetermined position of the optical disc at which the reading or writing can be performed at or below the upper limit value when the upper limit value is lower than the upper limit value at which the backup operation is possible, and the predetermined position Control is performed to read or write information from the optical disc by moving the optical pickup to a predetermined position where the temperature of the optical pickup is maintained at the upper limit value or lower when performing continuous reading or writing thereafter. And control means.

  The optical disk recording / reproducing method according to claim 10, wherein an optical disk on which information is recorded is rotationally driven, information is read from or written to the optical disk by an optical pickup, and the information read by the optical pickup is reproduced or inputted. In the optical disc recording / reproducing method, in which information is recorded on the optical disc, and when the information is continuously read or written from the optical disc, the temperature of the optical pickup varies depending on the position where the reading or writing is performed. When the temperature of the optical pickup is measured and the optical pickup is reading or writing information from the optical disc, the measured temperature of the optical pickup is predetermined lower than the upper limit value at which the optical pickup can operate. When the value exceeds the first threshold, A predetermined position of the optical disc at which the reading or writing can be performed at or below a value, and the temperature of the optical pickup is maintained at a predetermined position or less when the continuous reading or writing is performed after the predetermined position. Control is performed such that information is read from or written to the optical disk by moving the optical pickup.

  An optical disc recording / reproducing program according to claim 11 comprises a drive means for rotationally driving an optical disc on which information is recorded, and an optical pickup for reading or writing information from the optical disc, and information is continuously read from the optical disc. When reading or writing data to the optical disk apparatus, the information reproducing means for reproducing the information read by the optical pickup or the input information is read from the computer of the optical pickup device in which the temperature of the optical pickup differs depending on the position at which the reading or writing is performed. In an optical disc recording / reproducing program that functions as information recording means for converting the information into a method for recording on the optical disc, temperature measuring means for measuring the temperature of the optical pickup, and the optical pickup reads or writes information from the optical disc. And In addition, when the temperature of the optical pickup measured by the temperature measuring unit is lower than the upper limit value at which the optical pickup can operate and is equal to or higher than a predetermined first threshold value, the temperature is equal to or lower than the upper limit value. The optical pickup is positioned at a predetermined position of the optical disc where reading or writing is possible, and the temperature of the optical pickup is maintained below the upper limit value when performing continuous reading or writing after the predetermined position. The computer is caused to function as a control means for controlling to move and read or write information from the optical disk.

  Hereinafter, an optical disc apparatus according to an embodiment of the present invention will be described. In the optical disc apparatus according to an embodiment of the present invention, when the temperature of the optical pickup measured by the temperature measuring unit is equal to or higher than a predetermined first threshold, the control unit continuously reads the optical pickup. Alternatively, when writing is performed, information is read or written by moving the optical pickup to a predetermined position where the temperature of the optical pickup is maintained below the upper limit value. By doing so, when the temperature of the optical pickup detected by the temperature detecting means is equal to or higher than the first threshold value, the optical pickup is moved to a predetermined position that maintains the upper limit value or less at which the optical pickup can operate. There is no need to interrupt or record.

  In addition, when the temperature measured by the temperature measuring unit is equal to or higher than the first threshold, the temperature of the optical pickup is lower than the first threshold when the optical pickup performs continuous reading or writing. You may move to the predetermined position which maintains temperature. In this way, when the temperature of the optical pickup detected by the temperature detecting means is equal to or higher than the first threshold, the optical pickup is moved to a predetermined position at a temperature lower than the first threshold, so that reproduction or recording is performed. There is no need to interrupt. Further, by setting the first threshold value lower than the temperature at which the laser diode of the optical pickup is turned off, it is possible to suppress the rise to the upper limit temperature of the optical pickup.

  In addition, a return position storage unit that stores a position that is equal to or greater than the first threshold value is provided, and the temperature of the optical pickup measured by the temperature measuring unit after the control unit moves the optical pickup to a predetermined position is determined in advance. When the value falls below the second threshold value, the optical pickup may be returned to the position stored in the return position storage means to read or write information from the optical disk. By doing so, when the temperature of the optical pickup decreases, the original position can be read and written.

  Further, the predetermined position where the temperature of the optical pickup is kept below the upper limit value or the predetermined position where the temperature of the optical pickup is kept lower than the first threshold is the outer peripheral position of the optical disc than the current reproduction position or recording position. Good. By doing so, when the temperature of the optical pickup tends to be high on the inner periphery of the optical disc, the optical pickup can be moved to the outer periphery to continue reproduction and recording.

  Further, the driving means may drive the optical disk to rotate by a constant linear velocity control method. By doing so, in the linear velocity constant (CLV) control method in which the temperature of the optical pickup generally increases at the inner periphery of the optical disc, the temperature rise of the optical pickup is suppressed, and further, reproduction or recording is not interrupted. it can.

  The information reproducing means may include storage means for storing information, and the optical pickup may intermittently read information from the optical disc, and the information reproducing means may store the information in the storage means. In this way, the present invention can be applied to a ripping operation in which information is stored in the storage means by rotating the optical disk at high speed.

  In addition, when the temperature measured by the temperature measuring unit is equal to or higher than the first threshold, the control unit is a predetermined range of the optical disc that can be read or written below the upper limit value, and is continuous after the predetermined range. When performing typical reading or writing, information in a predetermined range in which the temperature of the optical pickup is kept below the upper limit value may be read in an arbitrary order. By doing so, the reproduction is not interrupted even in reproduction at the same speed other than ripping.

  The information reproducing means or the information recording means is provided with identification means for identifying information once reproduced or recorded, and the control means reads or writes the information identified as having been reproduced or recorded once by the identification means. The pickup may not be performed. By doing so, when the temperature of the optical pickup becomes equal to or lower than the second threshold value and returns to the position where playback or recording has been performed before and restarts playback or recording, the temperature becomes equal to or higher than the first threshold value. Information that is moved and reproduced or recorded is not reproduced or recorded in duplicate.

  In addition, a substrate opposite to the optical disk may be provided, and the control unit may cause the information reproducing unit or the information recording unit to perform reproduction or recording from a position on the optical disk near a predetermined electronic component provided on the substrate. In this way, when the temperature of the optical pickup that performs reproduction or recording from an electronic component that generates a large amount of heat on the substrate exceeds the first threshold value, information other than the position near the electronic component is reproduced. Can do.

  The optical disc recording / reproducing method according to an embodiment of the present invention performs continuous reading or writing when the temperature of the optical pickup measured by the temperature measuring unit is equal to or higher than a predetermined first threshold value. When performing, control is performed to read or write information by moving the optical pickup to a predetermined position where the temperature of the optical pickup is kept below the upper limit value. By doing so, when the detected temperature of the optical pickup is equal to or higher than the first threshold, the optical pickup is moved to a predetermined position that maintains the upper limit value or less at which the optical pickup can operate, so reproduction and recording are interrupted. There is no need to do.

  The optical disc recording / reproducing program according to one embodiment of the present invention is such that when the temperature of the optical pickup measured by the temperature measuring unit becomes equal to or higher than a predetermined first threshold, the control unit continuously When reading or writing, information is read or written by moving to a predetermined position where the temperature of the optical pickup is maintained below the upper limit value. By doing so, when the temperature of the optical pickup detected by the temperature detecting means is equal to or higher than the first threshold value, the optical pickup is moved to a predetermined position that maintains the upper limit value or less at which the optical pickup can operate. There is no need to interrupt or record.

  The optical disk recording / reproducing program according to claim 11 may be stored in a recording medium. By doing so, the optical disc recording / reproducing program can be distributed alone as well as being incorporated into the device.

  An optical disc recording / reproducing apparatus 1 as an optical disc apparatus according to a first embodiment of the present invention will be described with reference to FIGS. The optical disk recording / reproducing apparatus 1 is an apparatus capable of recording and reproducing an optical disk such as a DVD (Digital Versatile Disc), a CD (Compact Disc), and a BD (Blu-ray Disc) and ripping the optical disk being reproduced to the hard disk. As shown in FIG. 1, a disk motor 2, an optical pickup 3, an optical pickup temperature detecting unit 4, an RF amplifier 5, a servo signal processing unit 6, a driver 7, and an audio / video signal processing unit 8 are provided. , A memory 9, a hard disk 10, a DA / AD converter 11, a microcomputer 12, and an audio signal / video signal output terminal 13.

  The disc motor 2 as a driving means is a motor for rotating the optical disc 14 set in the optical disc recording / reproducing apparatus 1, and is constituted by a spindle motor or the like.

  The optical pickup 3 includes a laser diode (not shown) that generates laser light to be irradiated on the optical disk 14, an objective lens for irradiating the optical disk 14 with laser light from the laser diode, and a signal from the servo signal processing unit 6 in the focus direction. And an actuator for driving the objective lens in the tracking direction and a light receiver that receives the reflected light reflected from the optical disk 14, and an RF signal including video and music recorded on the optical disk 14 from the output of the light receiver, A focus error signal, a tracking error signal, and the like are generated and output to the RF amplifier 5, and information is written to the optical disc 14. Further, an upper limit value of the operable temperature is determined in advance in the optical pickup 3, and reading and writing of information from the optical disk 14 are performed below the upper limit value.

  The optical pickup temperature detection unit 4 as temperature measuring means includes a sensor for measuring the temperature of the optical pickup 3 that differs depending on the position when information is continuously read or written from the optical disk 14, The measured temperature data is output to the microcomputer 12.

  The RF amplifier 5 amplifies the signal input from the optical pickup 3 to a predetermined value and outputs it to the servo signal processing unit 6.

  The servo signal processing unit 6 controls the focus and tracking by driving the actuator of the optical pickup 3 based on the control signal such as the focus error signal and the tracking error signal input from the RF amplifier 5, and is recorded on the optical disk 14. To read the information correctly. Further, the RF signal including video and music recorded on the optical disk 14 is converted from analog to digital and output to the audio / video signal processing unit 8.

  The driver 7 amplifies the signal input from the servo signal processing unit 6 and outputs it to the disk motor 2 and the optical pickup 3.

  The audio / video signal processing unit 8 serving as an information reproducing unit and an information recording unit performs error correction on the signal input from the servo signal processing unit 6, performs demodulation and decoding, and outputs the result to the hard disk 10. When the hard disk 10 is not used, the decrypted data is temporarily stored in the memory 9. Then, in accordance with a request from the microcomputer 12, the data is read from the memory 9 and output to the DA / AD converter 11. When writing information, the audio and video input from the DA / AD converter 9 are encoded and modulated and output to the servo signal processing unit 6.

  The memory 9 temporarily stores data such as audio reproduced by the audio / video signal processing unit 8 so that the data is not interrupted by vibration or the like, or is input from the audio input / output terminal 13a and the video input / output terminal 13b. This is a memory for temporarily storing data for encoding and modulating audio and video, and is composed of a semiconductor memory.

  The hard disk 10 serving as a storage means compresses and records the data decoded by the audio / video signal processing unit 8 using an encoding method such as MP3 (MPEG Audio Layer-3) or AAC (Advanced Audio Coding) if it is audio. . At the time of reproduction, data is read out according to instructions from the microcomputer 12, decoded and output to the DA / AD converter 11. The data decoded by the audio / video signal processing unit 8 may be recorded as it is without performing compression encoding.

  The DA / AD converter 11 receives data stored in the memory 9 or data read from the hard disk, converts the digital signal data into an analog signal, and outputs it from the audio input / output terminal 13a and the video input / output terminal 13b. Output. Also, the input video and audio are converted into digital signals and output to the audio / video signal processing unit 8.

  A microcomputer 12 serving as a control means, a position storage means, and an identification means includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory). Control of the entire optical disc recording / reproducing apparatus 1 in each operation such as reproduction and stop and control of reproduction and recording are performed based on temperature data from the optical pickup temperature detection unit 4.

  Next, the operation when reading information from the optical disc 14 in the optical disc recording / reproducing apparatus 1 configured as shown in FIG. 1 will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 2 is realized by the CPU of the microcomputer 12 executing a control program stored in the ROM of the microcomputer 12.

  The flowchart shown in FIG. 2 is a flowchart of a reading method when performing a ripping operation in which the CLV optical disk 14 is rotated at a high speed and recorded on the hard disk 10. The information read at this time is reproduced by reading out the information recorded on the hard disk 10 and outputting it. In the present embodiment, the case where the optical disk 14 is a CD will be described. As shown in FIG. 3, the CD has a structure in which a lead-in area, a program area, and a lead-out area are formed in this order from the inner periphery. The lead-in area is an area where TOC (Table Of Contents) is recorded, and the program area is an area where tracks such as music as information are recorded. This area is recorded on the hard disk by ripping. It becomes a target. The lead-out area is an area indicating the end of the program area.

  First, in step S101, ripping is started from information recorded on the inner periphery of the optical disc 14, and the process proceeds to step S102. The optical pickup 3 moves to the inner periphery of the optical disk 14 to read information, and is sent to the hard disk 10 via the RF amplifier 5, the servo signal processing unit 6, and the audio / video signal processing unit 8, and recorded after compression encoding. . The position (address) at which ripping is completed is identified as ripped in the CPU, and the address range is stored in a RAM or the like.

  Next, in step S102, it is determined whether or not the entire range of the program area of the optical disc 14 has been ripped. If finished (if Yes), this flow is finished, and if not finished (if No) ) Proceeds to step S103.

  Next, in step S103, it is determined whether or not the position (address) on the optical disk that is currently being ripped has already been ripped. If ripped (if YES), the process proceeds to step S104, where ripping is performed. If not completed (NO), the process proceeds to step S105.

  Next, in step S104, the ripped position is skipped and the ripping is continued, and the process proceeds to step S105. In other words, it skips (searches) to the position (address) where the non-ripped information is recorded on the outer circumference of the ripped information, and continues ripping from the position where the non-ripped information is recorded. To do.

  Next, in step S105, it is determined whether or not the temperature data (P.U. temperature) measured by the optical pickup temperature detector 4 is equal to or higher than a threshold T1 as a first threshold. If YES), the process proceeds to step S106. If not (NO), the process returns to step S102. This threshold value T1 is set to a temperature lower than the upper limit value at which the optical pickup 3 can operate.

  Next, in step S106, the current ripping position (address) A of the optical disk 14 is stored in the RAM of the microcomputer 12, for example, and the process proceeds to step S107. That is, the position that is equal to or greater than the first threshold is stored.

  Next, in step S107, the servo signal processing unit 6 is instructed to move the optical pickup 3 to a position B that is located on the outer periphery of the position A and where information that has not been ripped is recorded. Ripping is started and the process proceeds to step S108. The position B is a position where the threshold value T1 or less can be maintained in the subsequent ripping operation. That is, when the temperature of the optical pickup 3 becomes equal to or higher than a predetermined first threshold, the temperature of the optical pickup 3 is lower than the upper limit value when the optical pickup 3 is continuously read or written. It is moved to a predetermined position that maintains a temperature lower than the first threshold value that is the temperature. Further, the predetermined position is the outer peripheral position of the optical disc rather than the current reproduction position or recording position.

  Next, in step S108, it is determined whether or not the ripping has been completed up to the outermost periphery of the optical disc 14, and if it is completed (in the case of Yes), the process proceeds to step S112, and if not (in the case of No), the process proceeds to step S109. move on.

  Next, in step S109, it is determined whether or not the position (address) on the optical disk that is currently being ripped has already been ripped. If ripped (if YES), the process proceeds to step S110, where ripping is performed. If not completed (NO), the process proceeds to step S111.

  Next, in step S110, the ripped position is skipped and the ripping is continued, and the process proceeds to step S111. In other words, it skips (searches) to the position (address) where the non-ripped information is recorded on the outer circumference of the ripped information, and continues ripping from the position where the non-ripped information is recorded. To do.

  Next, in step S111, it is determined whether or not the temperature data measured by the optical pickup temperature detection unit 4 is equal to or less than a threshold value T2 as a second threshold value. If it is equal to or less than T2 (in the case of Yes), the process proceeds to step S112. If not (No), the process returns to step S108. This threshold value T2 is set to a temperature equal to or lower than the first threshold value T1.

  Next, in step S112, the servo signal processing unit 6 is instructed to return the optical pickup 3 to the ripping position A (address) stored in the RAM in step S106, and the ripping is resumed from the position A. That is, when the temperature of the optical pickup 3 falls below a predetermined second threshold value, the optical pickup 3 is returned to the position stored in the return position storage means, and information is read from or written to the optical disk 14. ing.

  Here, the specific operation of the flowchart shown in FIG. 2 will be described with reference to FIG.

  FIG. 4 is a diagram showing the structure of the CD in a form different from that shown in FIG. 3 as shown in FIG. 4A, with the left side corresponding to the inner periphery and the right side corresponding to the outer periphery.

  First, as shown in FIG. 4B, ripping is started from the beginning (inner circumference side) of the program area (step S101). Then, as shown in FIG. 4C, when the temperature of the optical pickup 3 is detected to be equal to or higher than the threshold T1 at the position A (address) in the program area (step S105), the position A is stored and then shown in FIG. Thus, the position B (address) that has not been ripped on the outer periphery than A is searched and the ripping is performed from the position B (steps S106 and S107).

  Then, when the temperature of the optical pickup 3 is detected to be equal to or lower than the threshold value T2 at the position C as shown in FIG. 4E (step S111), the return to the stored position A as shown in FIG. (Step S112).

  When ripping reaches position B as shown in FIG. 4 (g), ripping has already been completed between positions B and C. Therefore, the position C is searched as shown in FIG. 4 (h). The subsequent steps are ripped (S103, S104, S109, S110). That is, the information identified as having been reproduced or recorded once is not read or written by the optical pickup 3.

  Next, the operation of this embodiment will be described focusing on the temperature change of the optical pickup 3. FIG. 5 is a view showing an example of the relationship between the temperature of the optical pickup 3 from the center of the optical disk 14 (the radial position, ie, the left side in the figure is the inner circumference and the right side is the outer circumference) and the temperature. A curve in the figure represents a temperature change when the optical pickup 3 sequentially moves from the inner periphery to the outer periphery for ripping or reproduction. In this example, since there are places where the upper limit value at which the optical pickup 3 can operate is exceeded, ripping cannot be performed sequentially. Therefore, the ripping is continued by moving from the point A where the temperature is equal to or higher than the threshold value T1 to a predetermined position on the outer periphery from the point B maintaining the temperature equal to or lower than the threshold value T1. Then, when ripping is performed up to point C that is equal to or lower than the second threshold T2, the process returns to point A and subsequent information from point A is ripped. It should be noted that the predetermined position that moves from the point A may be the outer periphery of the intersection D between the upper limit value and the curve at which the optical pickup 3 can operate. In this case, the temperature immediately after the intersection D becomes a temperature equal to or higher than the threshold value T1, but thereafter, the temperature decreases as reading is sequentially performed to the outer periphery, so that the upper limit value at which the optical pickup 3 can operate is not exceeded. Therefore, ripping can be continued without interruption.

  According to the present embodiment, when ripping from the optical disk 14 to the hard disk 10 by the optical disk recording / reproducing apparatus 1, if the temperature of the optical pickup 3 becomes equal to or higher than the threshold value T1, the ripping is performed after storing the ripped position. Ripping after a predetermined position on the outer periphery of the optical disk 14 from the point where the optical pickup 14 is performed, and when the temperature of the optical pickup 3 becomes equal to or lower than the threshold T2, the ripping is resumed by returning to the stored position. Because of this operation, even if the temperature of the optical pickup 3 increases on the inner periphery of the optical disk 14, the outer periphery is ripped until the temperature of the optical pickup 3 decreases. Playback is not interrupted.

  Next, an optical disk recording / reproducing apparatus 1 according to a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In this embodiment, the block configuration is the same as that of the first embodiment, but is different from the first embodiment in that the present invention is applied to normal reproduction instead of ripping. That is, the information read from the optical disk 14 is output as it is via the DA / AD converter 11 without being recorded on the hard disk 10. The operation when reading information from the optical disk 14 in this embodiment will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 5 is realized by the CPU of the microcomputer 12 executing a control program stored in the ROM of the microcomputer 12.

  First, in step S201, reproduction is started from information (track) recorded on the inner periphery of the optical disc 14, and the process proceeds to step S202. The optical pickup 3 moves to the inner circumference of the optical disk 14 to read information, and is output via the RF amplifier 5, servo signal processing unit 6, audio / video signal processing unit 8, memory 9, and DA / AD converter 11. . The track that has been played back is identified as being played back in the CPU, and the track number is stored in the RAM of the microcomputer 12 or the like.

  Next, in step S202, it is determined whether or not all tracks recorded in the program area of the optical disc 14 have been played back. If finished (in the case of Yes), this flow is finished, and if not finished ( In the case of No), the process proceeds to step S203.

  Next, in step S203, it is determined whether or not the track to be currently reproduced has already been reproduced. If it has been reproduced (YES), the process proceeds to step S204, and if it has not been reproduced (NO). Advances to step S205.

  Next, in step S204, the reproduced track is skipped and the reproduction is continued, and the process proceeds to step S105. That is, it skips (searches) to a non-reproduced track located on the outer periphery of the reproduced track and continues reproduction from the non-reproduced track.

  Next, in step S205, it is determined whether or not the temperature data (P.U. temperature) measured by the optical pickup temperature detection unit 4 is equal to or higher than the threshold value T1 as the first threshold value. If YES, the process proceeds to step S206. If not (NO), the process returns to step S202. The threshold T1 is set to a temperature lower than the upper limit temperature at which the optical pickup 3 can operate.

  Next, in step S206, the track number of the optical disk 14 currently being reproduced is stored in, for example, the RAM of the microcomputer 12, and the process proceeds to step S207. That is, the position that is equal to or greater than the first threshold is stored.

  Next, in step S207, after the reproduction of the track in which the number is stored in step S206, the servo signal processing unit 6 is moved to move the optical pickup 3 to a track that is located on the outer periphery of the track and is not reproduced. Instructed, reproduction is started in an arbitrary order after the track, and the process proceeds to step S208. Reproduction in an arbitrary order means reproduction in a predetermined order that is not in track number order or number order. The track that is not reproduced is a position where the operation upper limit value of the optical pickup 3 or the threshold value T1 or less can be maintained in the subsequent reproduction operation. In other words, when the temperature measured by the temperature measuring means is equal to or higher than the first threshold, the predetermined range of the optical disc 14 that is readable or writable below the upper limit value of the operating temperature of the optical pickup 3 is the predetermined range. When performing continuous reading or writing after the range, information in a predetermined range in which the temperature of the optical pickup 3 is maintained below the upper limit value is read in an arbitrary order.

  Next, in step S208, if it is determined whether or not all the playback from the track starting playback in step S207 of the optical disc 14 to the last track (outermost circumference) has been completed (YES), the process proceeds to step S212. If not (No), the process proceeds to step S209.

  Next, in step S209, it is determined whether or not the track to be currently reproduced has already been reproduced. If it has been reproduced (YES), the process proceeds to step S210, and if it has not been reproduced (NO). Advances to step S211.

  Next, in step S210, the reproduced track is skipped and the reproduction is continued, and the process proceeds to step S211. That is, it skips (searches) to a non-reproduced track located on the outer periphery of the reproduced track and continues reproduction from the non-reproduced track.

  Next, in step S211, it is determined whether or not the temperature data measured by the optical pickup temperature detection unit 4 is equal to or less than a threshold value T2 as a second threshold value. If it is equal to or less than T2 (in the case of Yes), the process proceeds to step S212. If not (No), the process returns to step S208. This threshold value T2 is set to a temperature equal to or lower than the first threshold value T1.

  Next, in step S212, the servo signal processing unit 6 is instructed to move the optical pickup 3 to the head of the track next to the track number stored in the RAM in step S206, and reproduction is resumed from that track. That is, when the temperature of the optical pickup 3 becomes equal to or lower than a predetermined second threshold value, the optical pickup 3 is returned to the position stored in the return position storage means, and information is read or written from the optical disk. Yes.

  According to this embodiment, when the optical disc 14 is played back by the optical disc recording / playback apparatus 1, if the temperature of the optical pickup 3 is equal to or higher than the threshold T1, the track being played back is stored and then played back. After completion, the track after the predetermined position on the outer periphery of the optical disk 14 is reproduced from the track, and when the temperature of the optical pickup 3 becomes the threshold value T2 or less, the reproduction is resumed from the track next to the stored track. To do. Since the optical pickup 3 operates in this way, even if the temperature of the optical pickup 3 increases on the inner periphery of the optical disk 14, the outer periphery is reproduced until the temperature of the optical pickup 3 decreases. Playback is not interrupted.

  In the above-described embodiment, the reading (ripping and reproduction) of information from the optical disk 14 has been described. However, when recording on the optical disk 14 is similarly performed, recording from the inner periphery causes the temperature to become equal to or higher than the first threshold value. The outer circumference may be recorded, and when the value falls below the second threshold, the recording may be returned to the inner circumference and recorded.

  In addition, when an electronic component that generates a large amount of heat is arranged on the substrate opposite to the optical disc 14 in the vicinity of the outer periphery or the middle periphery, not only on the inner periphery of the optical disc 14, playback or recording is performed from the vicinity of the electronic component. If the value is equal to or greater than the first threshold value, reproduction or recording may be performed by moving the optical pickup 3 to a position other than the vicinity of the electronic component such as the inner circumference. In short, it is sufficient to move the optical pickup 3 from a high temperature position to a low temperature position on the optical disk for reproduction and recording.

  In the above-described embodiment, the determination based on the threshold value T2 is performed to return to the position A. However, the determination may be made to return to the position A when ripping or reproduction is completed to the end of the outer periphery without performing the determination.

  According to the embodiment described above, the following optical disc recording / reproducing apparatus, optical disc reproducing method, and optical disc reproducing program can be obtained.

(Supplementary note 1) A disk motor 2 that rotationally drives an optical disk 14 on which information is recorded, an optical pickup 3 that reads or writes information from the optical disk 14, and audio / video signal processing that reproduces information read by the optical pickup 3. And an audio / video signal processing unit 8 that converts the input information into a method for recording the information on the optical disk 14. When information is continuously read or written from the optical disk 14, the read / write is performed. In the optical disc recording / reproducing apparatus 1 in which the temperature of the optical pickup 3 varies depending on the position to be performed,
An optical pickup temperature detector 4 for measuring the temperature of the optical pickup 3;
When the optical pickup 3 is reading or writing information from the optical disk 14, the temperature measured by the optical pickup temperature detection unit 4 is lower than an upper limit value at which the optical pickup 3 can operate and is equal to or higher than a predetermined threshold T1. When the read / write operation is performed, the temperature of the optical pickup 3 is a predetermined position on the optical disk 14 that can be read or written below the upper limit value, and the continuous reading or writing is performed after the predetermined position. And a microcomputer 12 that controls the optical pickup 3 to read or write information from the optical disk 14 by moving the optical pickup 3 to a predetermined position for maintaining the optical disk recording / reproducing apparatus 1.

  According to this optical disc recording / reproducing apparatus 1, when the temperature of the optical pickup 3 detected by the optical pickup temperature detection unit 4 is equal to or higher than the threshold value T1, the light is placed at a predetermined position that maintains the upper limit value or less at which the optical pickup 3 can operate. Since the pickup 3 is moved, there is no need to interrupt reproduction or recording.

(Supplementary Note 2) The optical disk 14 on which information is recorded is rotationally driven, the information is read or written from the optical disk 14 by the optical pickup 3, and the information read from or read from the optical pickup 3 is recorded on the optical disk 14. In the optical disc recording / reproducing method, when the information is continuously read from or written to the optical disc 14, the temperature of the optical pickup 3 differs depending on the position at which the reading or writing is performed.
When the temperature of the optical pickup 3 is measured and the optical pickup 3 is reading or writing information from the optical disc 14, the measured temperature of the optical pickup 3 is previously lower than the upper limit value at which the optical pickup 3 can operate. When the predetermined threshold T1 or more is reached, the optical pickup 3 is a predetermined position of the optical disc 14 that can be read or written below the upper limit value, and is continuously read or written after the predetermined position. An optical disc recording / reproducing method comprising: controlling the optical pickup 3 to read or write information from the optical disc 14 by moving the optical pickup 3 to a predetermined position where the temperature of the optical disc 3 maintains the upper limit value or less.

  According to this optical disc recording / reproducing method, when the detected temperature of the optical pickup 3 is equal to or higher than the threshold value T1, the optical pickup 3 is moved to a predetermined position that maintains the upper limit value or less at which the optical pickup 3 can operate. There is no need to interrupt the recording.

(Supplementary note 3) A disk motor 2 that rotationally drives an optical disk 14 on which information is recorded and an optical pickup 3 that reads or writes information from the optical disk 14, and continuously reads or writes information from the optical disk 14 When performing, the audio / video signal processing unit 8 for reproducing the information read by the optical pickup 3 is input to the computer of the optical disc recording / reproducing apparatus 1 in which the temperature of the optical pickup 3 differs depending on the position where the reading or writing is performed. In an optical disc recording / reproducing program for functioning as an audio / video signal processing unit 8 for converting the recorded information into a method for recording the information on the optical disc 14,
An optical pickup temperature detector 4 for measuring the temperature of the optical pickup 3;
When the optical pickup 3 is reading or writing information from the optical disk 14, the temperature of the optical pickup 3 measured by the optical pickup temperature detection unit 4 is set lower than the upper limit value at which the optical pickup 3 can operate. When the threshold value T1 or higher is reached, the temperature of the optical pickup 3 is a predetermined position on the optical disk 14 that can be read or written below the upper limit value and is continuously read or written after the predetermined position. The optical disk recording / reproducing program that causes the computer to function as a microcomputer 12 that controls the optical pickup 3 to read or write information from the optical disk 14 by moving the optical pickup 3 to a predetermined position that maintains the upper limit value or less. .

  According to this optical disc recording / reproducing program, when the temperature of the optical pickup 3 detected by the optical pickup temperature detecting unit 4 is equal to or higher than the threshold value T1, the optical pickup is maintained at a predetermined position that maintains the upper limit value or less at which the optical pickup 3 can operate. Since 3 is moved, there is no need to interrupt playback or recording.

  In addition, the Example mentioned above only showed the typical form of this invention, and this invention is not limited to an Example. That is, various modifications can be made without departing from the scope of the present invention.

1 is a block diagram of an optical disc recording / reproducing apparatus according to first and second embodiments of the present invention. FIG. 2 is a flowchart showing an operation of reading from an optical disc in the first embodiment of the optical disc recording / reproducing apparatus shown in FIG. It is explanatory drawing of the structure of CD. FIG. 3 is an explanatory diagram showing an example of an operation of the flowchart shown in FIG. 2. It is explanatory drawing which showed an example of the temperature change of the optical pick-up of the optical disk recording / reproducing apparatus shown by FIG. 6 is a flowchart showing an operation of reading from an optical disc in the second embodiment of the optical disc recording / reproducing apparatus shown in FIG.

Explanation of symbols

1. Optical disc recording / reproducing device (optical disc device)
2 Disc motor (drive means)
3 Optical pickup 4 Optical pickup temperature detector (temperature detection means)
8 Audio / video signal processing section (information reproduction means, information recording means)
10 Hard disk (storage means)
12 Microcomputer (control means, position storage means, identification means)
14 Optical disc

Claims (12)

Drive means for rotationally driving an optical disc on which information is recorded, an optical pickup for reading or writing information from the optical disc, information reproducing means for reproducing information read by the optical pickup, or input information on the optical disc An information recording means for converting into a recording method, and when reading or writing information continuously from the optical disc, in the optical disc apparatus, the temperature of the optical pickup differs depending on the position to read or write the information ,
Temperature measuring means for measuring the temperature of the optical pickup;
When the optical pickup is reading or writing information from the optical disc, the temperature measured by the temperature measuring unit is lower than an upper limit value at which the optical pickup can operate and is equal to or higher than a predetermined first threshold value. The optical pickup is at a predetermined position of the optical disc that can be read or written below the upper limit value, and the temperature of the optical pickup is changed when performing continuous reading or writing after the predetermined position. An optical disc apparatus comprising: control means for controlling the optical pickup to read or write information from the optical disc by moving the optical pickup to a predetermined position that maintains an upper limit value or less.   When the temperature measured by the temperature measuring unit is equal to or higher than the first threshold, the control unit detects the temperature of the optical pickup when the optical pickup is continuously read or written. 2. The optical disk apparatus according to claim 1, wherein the optical disk apparatus is moved to a predetermined position that maintains a temperature lower than a threshold value. Return position storage means for storing a position that is equal to or greater than the first threshold;
After the control means moves the optical pickup to the predetermined position, the temperature of the optical pickup measured by the temperature measurement means becomes equal to or lower than a predetermined second threshold value. 3. The optical disk apparatus according to claim 1, wherein the pickup is returned to a position stored in the return position storage means to read or write information from the optical disk.   A predetermined position at which the temperature of the optical pickup is maintained below the upper limit value or a predetermined position at which the temperature of the optical pickup is maintained at a temperature lower than the first threshold is greater than the current reproduction position or recording position. The optical disc apparatus according to claim 1, wherein the optical disc apparatus is an outer peripheral position.   5. The optical disc apparatus according to claim 4, wherein the driving means rotationally drives the optical disc by a linear velocity constant control method.   2. A storage unit for storing information to be reproduced by the information reproduction unit, wherein the optical pickup intermittently reads information from the optical disc, and the information reproduction unit stores the information in the storage unit. 6. The optical disk device according to any one of items 1 to 5.   When the temperature measured by the temperature measuring unit is equal to or higher than the first threshold, the control unit is a predetermined range of the optical disc that can be read or written below the upper limit, and The information in a predetermined range in which the temperature of the optical pickup is maintained below the upper limit value when performing continuous reading or writing after a predetermined range is read in an arbitrary order. The optical disc apparatus as described in any one of them. An identification means for identifying information reproduced or recorded once in the information reproducing means or the information recording means,
8. The information that is identified by the control unit as having been reproduced or recorded once by the identification unit is not allowed to be read or written to the optical pickup. 9. Optical disk device. A substrate opposite to the optical disc;
The control unit causes the information reproducing unit or the information recording unit to perform reproduction or recording from a position on the optical disc near a predetermined electronic component provided on the substrate. The optical disc device according to any one of the above. An optical disk on which information is recorded is driven to rotate, information is read or written from the optical disk by an optical pickup, information read from the optical pickup is reproduced or recorded, and information recorded on the optical disk is recorded from the optical disk. In the optical disc recording / reproducing method in which the temperature of the optical pickup differs depending on the position where the reading or writing is performed when reading or writing is continuously performed,
The temperature of the optical pickup is measured, and when the optical pickup is reading or writing information from the optical disc, the measured temperature of the optical pickup is previously lower than an upper limit value at which the optical pickup can operate. When a predetermined first threshold value is exceeded, when the reading or writing is performed at a predetermined position on the optical disc that is less than or equal to the upper limit value and is continuously read or written after the predetermined position. An optical disc recording / reproducing method comprising: controlling the optical pickup to read or write information from the optical disc by moving the optical pickup to a predetermined position where the temperature of the optical pickup is maintained at or below the upper limit value. Drive means for rotationally driving an optical disk on which information is recorded, and an optical pickup for reading or writing information from the optical disk, and when reading or writing information continuously from the optical disk, Information recording for converting the computer of the optical disc apparatus in which the temperature of the optical pickup differs according to the writing position into information reproducing means for reproducing the information read by the optical pickup or a method for recording the inputted information on the optical disc In an optical disc recording / reproducing program that functions as means,
Temperature measuring means for measuring the temperature of the optical pickup;
When the optical pickup is reading or writing information from the optical disc, the temperature of the optical pickup measured by the temperature measuring unit is set to be lower than an upper limit value at which the optical pickup can operate. When the threshold value of 1 or more is reached, the optical pickup is at a predetermined position of the optical disc that is readable or writable below the upper limit value and is continuously read or written after the predetermined position. An optical disc recording / reproducing function that causes a computer to function as a control unit that controls the optical pickup to read or write information from the optical disc by moving the optical pickup to a predetermined position where the temperature of the optical disc maintains the upper limit value or less. program.   A computer-readable recording medium storing the optical disc recording / reproducing program according to claim 11.

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