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1. 发明专利

JP2007273078A Optical disk drive device 有权
标题翻译：光盘驱动器件
公开(公告)号：JP2007273078A
公开(公告)日：2007-10-18
申请号：JP2007128124
申请日：2007-05-14
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： YOSHIMOTO KYOSUKE , M C RAO , OHATA HIROYUKI , NAKANE KAZUHIKO , FURUKAWA TERUO , KONDO JUNICHI , OTOTAKE MASABUMI
IPC分类号： G11B20/12 , G11B7/007 , G11B20/10
摘要： PROBLEM TO BE SOLVED: To perform quick access in an optical disk. SOLUTION: This drive device drives the optical device which is provided with a logical track composed of n-power of 2 (n is an integer) sectors. Each of the sectors includes an address region in which an address having consecutive numbers using binary numbers is recorded, and has the same length irrespective of a recording region attribute. The number of sectors in the logical track is constant irrespective of the recording region attribute. It is possible to obtain the physical position of a target sector on the disk simply and speedily. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：在光盘中执行快速访问。解决方案：该驱动装置驱动设置有由2（n为整数）扇区的n电力组成的逻辑磁道的光学装置。每个扇区包括其中记录具有使用二进制数的连续数的地址的地址区域，并且具有与记录区域属性无关的长度相同的长度。无论记录区域属性如何，逻辑磁道中的扇区数都是常数。可以简单快速地获得目标扇区在盘上的物理位置。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2007035268A Optical disk and optical disk driving device 有权
标题翻译：光盘和光盘驱动器件
公开(公告)号：JP2007035268A
公开(公告)日：2007-02-08
申请号：JP2006256742
申请日：2006-09-22
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： YOSHIMOTO KYOSUKE , M C RAO , OHATA HIROYUKI , NAKANE KAZUHIKO , FURUKAWA TERUO , KONDO JUNICHI , OTOTAKE MASABUMI
IPC分类号： G11B20/12 , G11B7/0045 , G11B7/007 , G11B20/10
摘要： PROBLEM TO BE SOLVED: To enable test recording for power adjustment in an optical disk.
SOLUTION: This optical disk is characterized in that a test track which is provided outside a data recording area, given an address outside the range of a data track, constituted of a logical track unit, and used for adjusting laser power for writing, and a guard track where data is not recorded in both of inner and outer peripheral sides of the test track, are included, wherein the guard track is disposed outside the data recording area, given addresses outside the data track range, and allocated by logical track units.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：使光盘中的功率调节测试记录。解决方案：该光盘的特征在于，设置在数据记录区域之外的测试轨道，给定由数据轨道的范围之外的地址，由逻辑轨道单元构成，并用于调整用于写入的激光功率，并且包括在测试轨道的内周和外周两侧未记录数据的保护轨道，其中保护轨道设置在数据记录区域的外部，给定数据磁道范围外的地址，并通过逻辑分配轨道单位。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JPH0676295A DEVICE FOR DRIVING OPTICAL DISK 失效
公开(公告)号：JPH0676295A
公开(公告)日：1994-03-18
申请号：JP19155791
申请日：1991-07-31
申请人： TEAC CORP , MITSUBISHI ELECTRIC CORP
发明人： ONDA HIROYUKI , MURATA HIDEHIKO , NAGATA TAKUYA , MASHITA TSUGUAKI , YOSHIMOTO KYOSUKE , OZAKI MINORU , FURUKAWA TERUO
IPC分类号： G11B7/00 , G11B7/004
摘要： PURPOSE:To save capacity in a buffer memory storing temporarily recording/ reproducing data in an optical disk and to use it for a data cache. CONSTITUTION:As the buffer memory 19, though a ring buffer divided to areas in plural addresses in the optical disk and capable of accessing circularly, it is realized by a RAM address specified by an address counter 22, and a head address is addressed continuously succeedingly to a final address equivalently. Further, the data is stored in entire areas of the buffer memory 19 by a control part 14 at a reproducing time, and the data is looked-ahead, and a relation between the storage address in the buffer memory 19 and a recording logic address in the optical disk 2 is stored in a logic address control memory 21 previously. At the time of access after a next time, when the data in a sector stored in the buffer memory 19 is requested, the optical disk 2 is not accessed, only the buffer memory is accessed.

4. 发明专利

JPH04206037A OPTICAL DISK APPARATUS 失效
公开(公告)号：JPH04206037A
公开(公告)日：1992-07-28
申请号：JP33753190
申请日：1990-11-30
申请人： TEAC CORP , MITSUBISHI ELECTRIC CORP
发明人： MASHITA TSUGUAKI , ONDA HIROYUKI , NAGATA TAKUYA , MURATA HIDEHIKO , YOSHIMOTO KYOSUKE , KOYANAGI KIMIYUKI , FURUKAWA TERUO
IPC分类号： G11B7/09
摘要： PURPOSE:To prevent errors of recorded information and reproduced information due to a change in an ambient temperature by detecting the ambient temperature at a place wherein an optical disk apparatus is installed and by altering an amount of control on the state of irradiation of a light beam when recording and reproduction instruction signals are not generated for a prescribed time. CONSTITUTION:A detection output of a temperature detector 20 is inputted to a control element 8, and the control element 8 detects an ambient temperature. When a timer T starts time count from a time point of non-generation of instruction signals for recording and reproduction of information and counts a prescribed time, in other words, when the instruction signals are not generated for the prescribed time, the control element 8 judges that the recording and reproduction of the information are not executed, and alters an amount of control for driving a linear motor 1c and an electromagnetic actuator 1d, on the basis of moving average values of offset and gain in the past. When the ambient temperature of a place of installation changes, according to this constitution, an amount of control on the state of irradiation of a light beam is corrected in terms of temperature and thereby errors of recorded information and reproduced information can be prevented.

5. 发明专利

JPH03162746A METHOD AND DEVICE FOR RECORDING SIGNAL OF MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH03162746A
公开(公告)日：1991-07-12
申请号：JP30259589
申请日：1989-11-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIYOSE YASUHIRO , SHIMAMOTO MASAMI , ARAI RYUICHIRO , NAKANE KAZUHIKO , TANAKA KUNIMARO , NAKAGI YOSHIYUKI , FURUKAWA TERUO
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To extend the life of a laser diode to improve the reliability of the whole of a device by driving the laser diode with a pulse signal having a certain voltage at the time of irradiating a magneto-optical disk with the laser beam. CONSTITUTION:A laser diode LD5 is driven by a current with a pulse train signal (modulating signal) having a certain voltage to irradiate the magneto- optical disk with each the laser beam of high power and low power. That is, a recording signal RS and a single wave signal SS are inputted to input terminals 11 and 12 respectively, and a frequency modulator 34 is inputted with the recording signal RS and the single wave signal SS to output the modu lated signal. The modulated signal outputted from the modulator 34 is supplied as a driving signal DS of the LD 5 to an LD driver 4, and the driver 4 drives the LD 5 in accordance with the driving signal DS. The magneto-optical disk is irradiated with the laser beam whose power corresponds to the level of the recording signal RS. Thus, the life of the laser diode 5 is extended to improve the reliability of the device.

6. 发明专利

JPH03162745A METHOD AND DEVICE FOR RECORDING SIGNAL OF MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH03162745A
公开(公告)日：1991-07-12
申请号：JP30259489
申请日：1989-11-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIYOSE YASUHIRO , SHIMAMOTO MASAMI , ARAI RYUICHIRO , NAKANE KAZUHIKO , TANAKA KUNIMARO , NAKAGI YOSHIYUKI , FURUKAWA TERUO
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To extend the life of a laser diode to improve the reliability of the whole of a device by driving the laser diode with a pulse signal having a certain voltage at the time of irradiating a magneto-optical disk with a laser beam. CONSTITUTION:A laser diode LD5 is driven by the pulse signal (modulating signal PWMS) having a certain voltage to irradiate a magneto-optical disk with each the laser beam of high power and low power. That is, a recording signal RS and a clock CLK are inputted to input terminals 11 and 12, respectively, and a pulse width modulator 33 is inputted with the recording signal RS and the clock CLK to output the modulated signal PWMS. The modulated signal PWMS outputted from the modulator 33 is supplied as a driving signal DS of the LD 5 to an LD driver 4, and the driver 4 drives the LD 5 in accordance with the driving signal DS. The magneto-optical disk is irradiated with the laser beam whose power corresponds to the level of the recording signal RS. Thus, the life of the laser diode 5 is extended to improve the reliability of the device.

7. 发明专利

JPH03132975A METHOD AND DEVICE FOR ERASURE SETTING OF 4/11 RECORDING CODE 失效
公开(公告)号：JPH03132975A
公开(公告)日：1991-06-06
申请号：JP27098989
申请日：1989-10-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIMAMOTO MASAMI , FURUKAWA TERUO , NAKANE KAZUHIKO , KIYOSE YASUHIRO
IPC分类号： G11B7/00 , G11B7/004 , G11B20/10 , G11B20/18
摘要： PURPOSE:To improve the detection precision of data by detecting and deciding the feature of the code pattern of the precedent symbol of a 4/11 recording code, and changing error erasure generation algorithm. CONSTITUTION:A first erasure detection circuit 22 and a second erasure detec tion circuit 29 are different from each other in algorithm to generate erasure. Then, as for the decoding symbol SI of 11-bits inputted to a terminal 20, the precedent decoding symbol SI is latched by a latch circuit 21 at a clock SCK generated at a symbol period, and is inputted to a decision circuit 23, and the feature of the pattern is detected. Then, a selector circuit 24 selects either the output of the first erasure detection circuit 22 or the output of the second erasure detection circuit 29 according to this detected result, and outputs the selected output to an output terminal 26 as an erasure detection signal. Thus, the detection precision can be improved.

8. 发明专利

JPH02260923A METHOD AND DEVICE FOR GENERATING 4/11 CODE 失效
公开(公告)号：JPH02260923A
公开(公告)日：1990-10-23
申请号：JP8188989
申请日：1989-03-31
申请人： MITSUBISHI ELECTRIC CORP
发明人： ARAI RYUICHIRO , NAKANE KAZUHIKO , FURUKAWA TERUO
IPC分类号： G11B20/14 , H03M7/14
摘要： PURPOSE:To control detection errors and to obtain recording with highly dense density by excluding and deciding 74 patterns which are considered that the detection errors apt to occur. CONSTITUTION:The exclusive patterns consist of three pattern groups. The first pattern group is the pattern group where channel bits being significant '1' continue more than three excluding the pattern where four significant bits exist between an eight bit to an eleventh bit, and the pattern where four significant bits exist between a first bit to a fourth bit. The second pattern group is the pattern group where the channel bits being significant '1' exist in the first, second and fourth bits excluding the pattern where the significant bits exist in the first, second, fourth and fifth bits. The third pattern group is the pattern group where the channel bits being significant '1' exist in the eight, tenth and eleventh bits excluding the pattern where the significant bits exist in the seventh, eighth, tenth and eleventh bits.

9. 发明专利

JPH02240870A CLOCK BIT DETECTION METHOD AND CIRCUIT USED FOR EXECUTION THEREOF 失效
公开(公告)号：JPH02240870A
公开(公告)日：1990-09-25
申请号：JP6306089
申请日：1989-03-14
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAKANE KAZUHIKO , FURUKAWA TERUO , ARAI RYUICHIRO , SHIMAMOTO MASAMI , KIYOSE YASUHIRO
IPC分类号： G11B20/14 , G11B11/10 , G11B11/105
摘要： PURPOSE:To attain high accuracy detection by detecting a clock bit of the sample servo system depending on the count of a pit in a servo area and on the arrangement order of the result of count. CONSTITUTION:A bit detection signal PIT is counted by a pit counter 10 and an elapsed time is counted in the input timing of the signal PIT given to a servo area detection window generating circuit 11 together with a channel clock CHCLK. Five signals PIT in a 1st regulation time T1 and 3 signals PIT in a 2nd regulating time T2 are counted, then a servo area detection circuit 12 outputs a servo area detection signal DET at the end of a time T1. In other case, the circuit 11 and the counter 10 are brought into the standby state. A clock bit detection gate generating circuit 13 uses the clock CHCLK in the input timing of the signal DET to output a clock pit detection gate CGATE and outputs a detection signal DETPIT when the clock pit is detected and outputs NOPIT when no detection signal DETPIT is detected.

10. 发明专利

JPH02201781A DATA REPRODUCING METHOD AND DEVICE USED FOR EXECUTION OF METHOD 失效
公开(公告)号：JPH02201781A
公开(公告)日：1990-08-09
申请号：JP2169789
申请日：1989-01-31
申请人： MITSUBISHI ELECTRIC CORP
发明人： ARAI RYUICHIRO , FURUKAWA TERUO , NAKANE KAZUHIKO , SHIMAMOTO MASAMI , KIYOSE YASUHIRO
IPC分类号： G11B20/18 , G11B20/14 , H03M7/14 , H04L25/49
摘要： PURPOSE:To decrease the load of an error correcting circuit by reproducing 4/11 codes from which a prescribed exclusion pattern is eliminated, and making a fourth bit into an error when the four high-order bits are made into the exclusion pattern, and deciding that a reproduced signal at the fifth bit is significant. CONSTITUTION:Data, from which exclusion patter is eliminated and which is 4/11-encoded, are detected by an optical head 12, A/D-converted by an A/D converter 14, applied to a level detecting circuit 15, a level is detected, and a magnitude sequence is decided. Further a fourth channel bit number N from the high-order of a decided digital value DS is applied to an error detecting circuit 16, it is compare with the channel bit number of the exclusion pattern, when it corresponds to the exclusion pattern, not the fourth bit but the fifth bit is selected as significant one, and the error is corrected at the time of decoding. Thus the detecting errors are decreased, and the corrections in the error correcting circuit can be decreased.

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