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公开(公告)号：JPH0460960A
公开(公告)日：1992-02-26
申请号：JP16811590
申请日：1990-06-26
Applicant: SONY CORP
Inventor： NISHIDA NORIO , YAMASHITA YOSHIHIDE
IPC: G11B19/28
Abstract: PURPOSE:To enable servo control with high accuracy by controlling the speed of a spindle motor based on error between a count value sampling the output of a counter and a prescribed reference value according to either the rotation detecting output of the spindle motor or the regenerative output of sector pulses recorded on a disk at prescribed intervals. CONSTITUTION:A counter 9 counts a clock signal as a continuous value and in a stage when the rotation of a spindle motor 7 starts, the output of the counter 9 is sampled by the rotation detecting output of the spindle motor 7. In the state of sufficiently starting the rotation of the spindle motor 7 and making it stable, the output of the counter 9 is sampled according to the regenerative output of sector pulses recorded on a disk 1 at prescribed intervals. Next, difference between the outputs of the counter 9 at the timings of two adjacent samplings is calculated and based on error formed by comparing the difference of this count value with a reference count value, the rotating speed of the spindle motor 7 is controlled. Thus, servo control is enabled with high accuracy.
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公开(公告)号：JP2006138926A
公开(公告)日：2006-06-01
申请号：JP2004326408
申请日：2004-11-10
Inventor： GOTO SATORU , MAZAKI HIROSHI , KOBAYASHI IZUSHI , NISHIDA NORIO , SUZUKI TORU , SUZUKI FUMIYASU
CPC classification number: G03B21/28 , H04N9/3129
Abstract: PROBLEM TO BE SOLVED: To display a picture by using a display element and to efficiently measure the modulation characteristic of the display element. SOLUTION: The reference position of a scanning mirror 216 of an optical deflection means 113 is set at the position at which a light beam is so reflected as to be directed toward an enlarging projection system 115 in a case where a two-dimensional picture is displayed on a screen, and the reference position of the scanning mirror 216 of the optical deflection means 113 is set at the position at which the light beam is so reflected as to be directed toward an optical detection means in a case where the modulation characteristic of the display element 111 is measured. Usually, the scanning is performed by a scanning mirror driven by a galvanomotor or the like when a picture is displayed, and the reference position of the scanning mirror 216 is switched by an auxiliary driving means provided in the optical deflection means 113 when the reference position is switched. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：通过使用显示元件显示图像并有效地测量显示元件的调制特性。 解决方案：光偏转装置113的扫描镜216的基准位置被设置在光束如此被反射以指向扩大投影系统115的位置，在二维 在屏幕上显示图像，并且在偏转装置113的扫描反射镜216的参考位置被设置在光束被如此被反射以指向光学检测装置的位置，在调制 测量显示元件111的特性。 通常，当显示图像时，由通过电动机等驱动的扫描反射镜执行扫描，并且当参考位置在扫描反射镜216的参考位置由设置在光学偏转装置113中的辅助驱动装置切换时，扫描反射镜216的基准位置被切换 被切换 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2002015423A
公开(公告)日：2002-01-18
申请号：JP2000191625
申请日：2000-06-26
Applicant: SONY CORP
Inventor： NISHIDA NORIO
Abstract: PROBLEM TO BE SOLVED: To provide an optical disk device capable of appropriately discriminating the class of an optical disk to be loaded with a simple configuration. SOLUTION: Laser beams with the wavelength of 780 nm for a CD to be emitted from a laser diode 4 to the optical disk 2 are focused and converged on the signal recording surface of the optical disk 2 with the focusing control of an objective lens 6 controlled by a drive circuit 10 under such a condition that a thread 14 is moved at a constant speed Vc in the radial direction of the optical disk 2. Then, a tracking error signal is detected through an LPF 11 by a tracking error signal producing circuit 8 under the focused and converged state of the laser beams, and whether the loaded optical is discriminated by a CPU 9 based on the amplitude of a tracking error signal to appropriately discriminate whether the optical disk to be loaded is the CD or DVD within a short time of one focus search with a simple configuration, thus the optical disk can appropriately and efficiently be recorded and reproduced.
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公开(公告)号：JPH01267877A
公开(公告)日：1989-10-25
申请号：JP9651088
申请日：1988-04-18
Applicant: SONY CORP
Inventor： KOBAYASHI SEIJI , NISHIDA NORIO , EGUCHI NAOYA , YOSHIMURA SHUNJI
Abstract: PURPOSE:To move an optical head in a short time to the necessary recording track by preventing the runaway of an optical spot by pulling the optical spot into an aiming track based on a tracking signal. CONSTITUTION:The tracking signal whose signal level varies within the range of before and after two tracks centering around an aiming track and is larger compared to a tracking error signal is formed by detecting the recording pattern circulating in order formed on the continuous recording tracks of an optical disk. An optical spot can surely be pulled into the aiming track compared to the case of pulling into the aiming track by only the tracking error signal by pulling the optical spot into the aiming track based on the tracking signal. The runaway of the optical spot is thus prevented and the optical head can be moved in a short time to the necessary recording track.
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公开(公告)号：JPS63181179A
公开(公告)日：1988-07-26
申请号：JP1271687
申请日：1987-01-22
Applicant: SONY CORP
Inventor： KOBAYASHI SEIJI , NISHIDA NORIO
Abstract: PURPOSE:To stably and easily perform leading-in to a track and track jump by using a signal, which is proportional to the displacement from a recording track in the direction of the track pitch of recording tracks, as the error signal. CONSTITUTION:A signal circuit is provided which obtains a signal Vx proportional to displacement (x) from a recording track 11a in the direction of track pitch (p) of the recording track 11a, and the signal Vx is used as the error signal to perform the tracking servo. Since the error signal Vx is unequivocally determined for displacement (x) from the recording track 11a, the target value of the tracking servo is changed to perform track jump with the track servo performed. Thus, leading-in to the track and track jump are stably performed.
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Patent Agency Ranking
公开(公告)号：JPS63149835A
公开(公告)日：1988-06-22
申请号：JP29664486
申请日：1986-12-15
Applicant: SONY CORP
Inventor： EGUCHI NAOYA , NISHIDA NORIO
Abstract: PURPOSE:To improve the drawing performance by detecting a tracking polarity signal from a clock bit on an optical disk and controlling the opening/closing of a tracking servo by means of the detection signal. CONSTITUTION:In an optical system 10, a laser beam P is radiated on the optical disk D, and a reflecting beam of light is made incident on a light receiving element 11. An output from the element 11 is inputted to signal processing circuits 20 and 30. The circuit 20 detects first and second warbling bits from the track of the disk D, and holds them by sampling, and outputs a tracking error signal (et). The circuit 30 detects a clock bit, and hold it by sampling, and outputs a tracking polarity signal. The output from the circuit 30 is supplied to a signal processing circuit 40, and this circuit 40 detects the polarity of the tracking polarity signal at the zero crossing point with an output signal from the circuit 20, and outputs the result. The switch 53 of a tracking servo circuit 50 is closed at the H-level of this output signal to form a brake signal, and thus the drawing of a signal can be easily achieved.
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公开(公告)号：JP2000311373A
公开(公告)日：2000-11-07
申请号：JP12287499
申请日：1999-04-28
Applicant: SONY CORP
Inventor： KONDO MASAMICHI , MIKAMI TATSURO , NISHIDA NORIO
IPC: G11B7/126 , G11B7/00 , G11B7/0037 , G11B7/0045 , G11B7/125 , G11B19/04 , G11B19/02
Abstract: PROBLEM TO BE SOLVED: To perform the control made to correspond to dust or a defect by discriminating dust (a mote, a scratch) on the surface of a disk from the defect on a recording surface. SOLUTION: The disk drive generates a defect detection signal (e) which is made to correspond to a signal whose level change is relatively fast by being made to correspond to the defect on a recording surface and a dust detection signal (g) which is made to correspond to a signal whose level change is relatively slow by being made to correspond to the dust on the surface of a disk in the pull-in signal PI (a) made to correspond to the reflected light of the disk. Then, the system controller of the device performs the retry of a recording operation when the defect detection signal (e) is, for example, a low level and performs a control increasing a laser beam when the dust detection signal (g) is a low level. Moreover, the controller controls the outgoing light quantity of a laser diode so that the product of the outgoing light of the diode and the reflected light from the disk becomes a prescribed level.
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公开(公告)号：JPH07272298A
公开(公告)日：1995-10-20
申请号：JP7989194
申请日：1994-03-26
Applicant: SONY CORP
Inventor： NISHIDA NORIO
Abstract: PURPOSE:To automatically adjust the midpoint of a galvanomirror for displacing a beam spot in the radial direction of an optical disk so as to be located on an optimal position. CONSTITUTION:The disk surface of an optical disk 11 is irradiated with beams emitted from a laser in an optical block 1 through a galvanomirror 5, a 45 deg.-mirror 6 and an objective lens 7. The position of the beam spot in the radial direction is controlled by the movement of the 45 deg.-mirror 6 on a carriage 22 and the objective lens 7 and the rotation of the galvano-mirror 5. The returned beam is detected by means of a quadripartite detector 10 and a reproducing RF signal is supplied to latches 28, 29, 30 through an A/D converter 24. The levels of the reproducing signals of two servo pits previously recorded on the servo zone of the optical disk 11 are detected by means of the latches 28, 29 and supplied to a DSP 33. The DSP 33 changes stepwise the bias of a driving signal supplied to the galvano-mirror 5 through an D/A converter 35 and a drive amplifier 38 so that the level sum of the reproducing signals of two servo pits becomes maximum.
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公开(公告)号：JPH07272275A
公开(公告)日：1995-10-20
申请号：JP8257594
申请日：1994-03-29
Applicant: SONY CORP
Inventor： NISHIDA NORIO , TSUKADA HIROSHI
IPC: G11B7/00 , G11B7/0045 , G11B7/007 , G11B7/125 , G11B7/126 , G11B11/105 , G11B19/00 , G11B20/12 , G11B20/14
Abstract: PURPOSE:To enable recording data continuously in plural zones by eliminating a waiting time at the time of switching a zone. CONSTITUTION:A phase error signal is formed from a reproduced signal of a servo zone of an optical disk 1, and a servo clock is generated from a servo PLL 8. This device is provided with data PLL 9a, 9b which frequency-divides the servo clock. Laser power of the servo zone is detected by a circuit 11a for read ALPC, recorded laser power is detected by a circuit 11b in an ALPC area for write ALPC. These monitored value is compared with the reference value, a DSP 14 controls a bias value of a driving signal so that the detected value is made equal to the reference value. At the time of writing, a laser is made to emit pulsed light by a data clock. Since write ALPC of the next zone also is performed in the present zone, either of PLL 9a, 9b generates a data clock of the present zone, the other part generates a data clock of the next zone, these data clocks are selectively supplied to the laser.
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公开(公告)号：JPH06309790A
公开(公告)日：1994-11-04
申请号：JP10314893
申请日：1993-04-28
Applicant: SONY CORP
Inventor： NISHIDA NORIO
Abstract: PURPOSE:To decrease redundancy of track information and to prevent degradation of reliability by reading out track information of each sector and discriminating normal track information with decision by majority. CONSTITUTION:Track information (RADR) provided at each sector of a track of an optical disk 10 is read out and demodulated by a track address detecting circuit 23. This demodulated RADA is processed deciding by majority by a signal processing circuit 28 controlled by a host computer 30. For example, when continuous three RADR coincide with each other, the RADR is effective, two or more pieces out of three RADR coincide, the coincident RADR is made effective, address compensation is performed based on the effective RADA. Thereby, the track address is controlled well and degradation of reliability can be prevented suppressing decrease of storage capacity by decreasing redundancy of track information.
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