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1. 发明专利

JP2002298382A METHOD FOR MEASURING OFFSET 失效
公开(公告)号：JP2002298382A
公开(公告)日：2002-10-11
申请号：JP2001095735
申请日：2001-03-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KITAYAMA MACHIKO , KUWABARA MASAYA , TAI YASUHIRO
IPC分类号： G11B7/085 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To solve the problem that the measurement of a DC offset quantity resulted from the deviation quantity of optical axis of an objective lens is influenced by the radius position of a disk. SOLUTION: A first DC offset quantity O1 is measured by moving the objective lens in the radial direction by a prescribed distance X1 . Subsequently, a transfer stand on which the objective lens is mounted is moved in the radial direction by a prescribed distance Y1 , and a second offset quantity O2 is measured by moving the objective lens by a prescribed distance X2 in this state. The influence of the radius position of the disk is suppressed by selecting X1 , Y1 , and X2 .

2. 发明专利

JP2002197685A OPTICAL DISK CONTROLLER 失效
公开(公告)号：JP2002197685A
公开(公告)日：2002-07-12
申请号：JP2000390339
申请日：2000-12-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ABE MASAYOSHI , KONNO KOUJIYU , IZUMI MITSUHIKO , TAI YASUHIRO
IPC分类号： G11B7/005 , G11B7/09 , G11B20/00 , G11B20/02 , G11B20/10
摘要： PROBLEM TO BE SOLVED: To solve such problems in an optical disk controller that the constitu tion is enlarged to cope with various kinds of disks, the number of connecting lines between ICs is increased due to the component addition to the IC constitu tion being the reference, the number of pins for individual ICs is increased, whereby the controller is adverse in terms of cost and also reliability. SOLUTION: By controlling a parallel-serial conversion circuit 12 in accordance with the conversion instruction from a circuit 13 for generating the A-D conversion instruction and operating a multiplexer 10 in accordance with the conversion instruction obtained from a serial-parallel conversion circuit 11, an optional reproduction control signal is successively outputted from the multiplexer 10 for every conversion instruction by the conversion instruction from an A-D converter 169, then the reproduction control signal corresponding to the conversion instruction is transferred in the time-division manner to the A-D converter 169.

3. 发明专利

JPH0426930A SERVO DEVICE FOR OPTICAL DISK 失效
公开(公告)号：JPH0426930A
公开(公告)日：1992-01-30
申请号：JP13156190
申请日：1990-05-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IMANAKA RYOICHI , ABE MASAYOSHI , TAI YASUHIRO
IPC分类号： G11B7/085 , G11B7/09
摘要： PURPOSE:To drive a servo system with one digital signal processor (DSP) by executing a digital division processing to a servo error signal and a total sum signal for focusing and tracking, and inputting them to the DSP. CONSTITUTION:The servo error signal and total sum signal for focusing and tracking detected from the reflected light of an optical disk 1 are respectively attenuated, successively selected and inputted to a DSP 37 after A/D conversion. The DSP 37 sets the attenuation rates of respective attenuators 21-24 for these inputted servo error signal and total sum signal, standardizes the respective servo error signals with the respective total sum signals and outputs them as servo driving signals after film arithmetic operation. Thus, the servo system can be driven by one DSP.

4. 发明专利

JPH03288901A PULSE WIDTH MODULATION TYPE DRIVING DEVICE 失效
公开(公告)号：JPH03288901A
公开(公告)日：1991-12-19
申请号：JP9160290
申请日：1990-04-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAI YASUHIRO , ABE MASAYOSHI
IPC分类号： G11B7/09 , G05B11/26
摘要： PURPOSE:To output a pulse even when a drive input signal level is close to zero by driving a load according to a differential component between the two phases of pulse-shaped outputs to be outputted from the first and second output means. CONSTITUTION:A load 14 connected between the outputs of first and second output means 12 and 13 is driven by the two phases of pulsative output signals to be outputted from these first and second output means 12 and 13. Then, the width of the output pulses from the first and second output means 12 and 13 is successively controlled by applying a drive timing command B1 corresponding to a drive input signal A, which is inputted to a drive timing generating means 11, from the driving timing generating means 11 to the first and second output means 12 and 13. Thus, the problem of not outputting the pulse when the drive input signal level is close to zero can be prevented.

5. 发明专利

JPH02311902A DIGITAL CONTROLLER 失效
公开(公告)号：JPH02311902A
公开(公告)日：1990-12-27
申请号：JP13491689
申请日：1989-05-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAI YASUHIRO
IPC分类号： G05B11/36 , G05B15/02
摘要： PURPOSE:To avoid the alias disturbance by inputting the output of a detector which detects the state of a control object to an HPF where the signal delay is approximately fixed at least at the passing band. CONSTITUTION:An HPF 13 has the bessel characteristic where the signal delay is approximately fixed at the passing band. Simultaneously, a digital compensator 15 calculates the control operation output based on the control algorithm where the compensator 15 compensates the delay time of the HPF 13 with the use of the output of an A/D converter 14 set precedingly by one sample. The calculated output is inputted to the control object. Thus it is possible to avoid the alias disturbance that causes a problem at the A/D conversion.

6. 发明专利

JP2000222750A OPTICAL DISK DEVICE 失效
公开(公告)号：JP2000222750A
公开(公告)日：2000-08-11
申请号：JP2355499
申请日：1999-02-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAI YASUHIRO , YAMADA SHINICHI , YAMAGUCHI HIROYUKI , TAKAUCHI KENJI
IPC分类号： G11B7/09 , G11B19/02
摘要： PROBLEM TO BE SOLVED: To provide an optical disk device that records and reproduces information on a recording carrier, conducts a safe and stable track jump detection in both real time and non-real time recordings of continuous data and does not degrade the reliability of the data and a real time system. SOLUTION: The device is provided with a first track jump detecting means 110 which detects the fact that the positional deviation between light beams and a track exceeds a prescribed value and has a fast detecting speed, and a second track jump detecting means 111 which has a slow detecting speed and a high detection precision and makes no maldetection. A recording stopping means 104 selects either one of the means 110 or 111 depending on the operating condition of the device, discriminates the fact that the output of the device becomes a prescribed condition and stops a recording operation.

7. 发明专利

JPH06236576A DEVICE AND METHOD FOR CONTROLLING LASER POWER 失效
公开(公告)号：JPH06236576A
公开(公告)日：1994-08-23
申请号：JP30642593
申请日：1993-12-07
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： AKAGI TOSHIYA , TAI YASUHIRO
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/125 , G11B7/126
摘要： PURPOSE:To realize a device for controlling laser power capable of stably setting recording power even for increasing the operating speed of an optical recording and reproducing device by previously setting the recording power in a gap section existing during a recording area on a recording medium. CONSTITUTION:A part of a laser beam outgoing from a semiconductor laser 1 is detected by a photodetector 2, and the laser power is controlled by driving the semiconductor laser 1 with a driving circuit 5 by an operation processor 3 so that the outgoing beam power of the semiconductor laser 1 becomes a prescribed value while referring the detected signal. Then, the stable recording power is set even for increasing the operating speed by previously setting the recording power in plural gap sections existing during the recording area on the recording medium, storing them in an external storage 4 and power controlling using the value of the external storage means 4 at a recording time.

8. 发明专利

JPH06202705A DIGITAL CONTROLLER 失效
公开(公告)号：JPH06202705A
公开(公告)日：1994-07-22
申请号：JP51993
申请日：1993-01-06
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAI YASUHIRO , ABE MASAYOSHI , AKAGI TOSHIYA
IPC分类号： G05B11/36 , G05D25/02
摘要： PURPOSE:To provide an excellent control characteristic by suppressing the unnecessary response of a controlled object due to the stepwise output change of a D/A converter with respect to the digital controller which controls various controlled objects. CONSTITUTION:A detector 12 which detects the operating state of a controlled object 11, an A/D converter 13 which subjects the analog output signal of the detector 12 to A/D conversion, a digital compensating means 14 which compensates the output of the A/D converter 13 by the digital signal processing, a D/A converter 15 which subjects the output of the digital compensating means 14 to D/A conversion, and a high band component eliminating means 16 which eliminates the high frequency component included in the output of the D/A converter 15 are provided. The output of the high band component eliminating means 16 is inputted to the controlled object 11 to suppress the unnecessary response of the controlled object 11 due to the stepwise output change of the D/A converter 15, thus obtaining the excellent control characteristic.

9. 发明专利

JP2004259438A Optical disk control device 审中-公开
公开(公告)号：JP2004259438A
公开(公告)日：2004-09-16
申请号：JP2004136352
申请日：2004-04-30
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： ABE MASAYOSHI , KONNO KOUJIYU , IZUMI MITSUHIKO , TAI YASUHIRO
IPC分类号： G11B7/09 , G11B7/13
摘要： PROBLEM TO BE SOLVED: To solve such a problem that the constitution for coping with various kinds of disks is enlarged, the number of connecting lines between each IC is increased by adding them to basic IC constitution, the number of pins of respective ICs is increased, and the situation goes in the direction disadvantageous in manufacturing cost and reliability, in an optical disk control device. SOLUTION: Arbitrary reproducing control signals are outputted successively from a multiplexer 10 for each conversion instruction by the conversion instruction from an AD converter 169 by controlling a parallel serial converting circuit 12 based on the conversion instruction from an AD conversion instruction generating circuit 13 and operating the multiplexer 10 based on the conversion instruction obtained from a serial parallel converting circuit 11, a reproducing control signal corresponding to the conversion instruction is time-division-transferred to the AD converter 169. COPYRIGHT: (C)2004,JPO&NCIPI

10. 发明专利

JP2000163280A MICROPROCESSOR, MICROPROGRAM DEBUG SYSTEM, AND MICROPROCESSOR BUILT-IN DEVICE 失效
公开(公告)号：JP2000163280A
公开(公告)日：2000-06-16
申请号：JP33356198
申请日：1998-11-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAI YASUHIRO , ISHIBASHI HIROSHIGE , MIYAZAKI ATSUSHI
IPC分类号： G06F11/28 , G06F11/22
摘要： PROBLEM TO BE SOLVED: To provide a microprocessor, a microprogram debug system and a microprogram built-in device which can perform debug in the original form of a device as it is. SOLUTION: The IO part 102 of a microprocessor that is originally built in a device does not have to newly add and connect a signal line for microprogram debug in order to perform both communication between an external circuit being an original function and a processor core part 101 and communication between the external circuit for performing debug and a trace controlling part 104, connection by a probe that is essential in a debug system in which a conventional in circuit emulator is used becomes unnecessary, and debug can be performed in the original form of the device as it is.

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