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1. 发明专利

JP2002203320A CONTROL METHOD OF SEMICONDUCTOR LASER AND CONTROLLER OF SEMICONDUCTOR LASER 审中-公开
公开(公告)号：JP2002203320A
公开(公告)日：2002-07-19
申请号：JP2001259692
申请日：2001-08-29
申请人： MATSUSHITA ELECTRIC IND CO LTD , VICTOR COMPANY OF JAPAN
发明人： KOISHI KENJI , MIYAHASHI YOSHIYUKI , USUI MAKOTO , KONNO KOUJIYU , UEKI YASUHIRO , UENO TOMONORI , OSADA YUTAKA , FUJIMOTO TORU
IPC分类号： G11B7/0045 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To solve such a conventional problem that the continuity of the amplitude of a signal track is impaired by the deterioration of the reproducing amplitude at the recording start end part of the data recording area added, written, at additional writing on an optical disk such as a DVD-R or DVD-RW. SOLUTION: The control method of the semiconductor laser and the semiconductor laser controller are provided, by which the recording power of the semiconductor laser is controlled for setting to the target power value at a high speed from the time immediately after the start of additional writing by the feed-forward control and also controlled for keeping to the target recording power value stably in a long time by continuously operating the feed-back controller during the data recording period even through the time of recording operation is prolonged and the current value for setting to the target power value by the temperature characteristic of the semiconductor laser is changed.

2. 发明专利

JP2002216363A OPTICAL DISK DEVICE AND INFORMATION READOUT METHOD 审中-公开
公开(公告)号：JP2002216363A
公开(公告)日：2002-08-02
申请号：JP2001349962
申请日：2001-11-15
申请人： MATSUSHITA ELECTRIC IND CO LTD , VICTOR COMPANY OF JAPAN
发明人： IGUCHI MUTSUMI , KOISHI KENJI , KONNO KOUJIYU , OSADA YUTAKA , OTA MITSUHIKO , KAWAI TAKU
IPC分类号： G11B7/007 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To detect correctly whether the recording is made on a correct track and increase the reliability on recording. SOLUTION: An optical disk device which reads out an address information from the optical disk having an intra track part which is formed between the tracks on which the address information is recorded, comprises a optical head which radiate laser on a optical disk, divided into a first detector and a second detector; each having an optical head which detects the reflection light from the optical disk and outputs the detected signal, an adjusting circuit which adjusts the amplitude of the first and second detection signals on the position where the address information is recorded, a differential operation circuit which outputs a differential signal which is the differential of the detected and adjusted first and second signals, and an address detection circuit which detects the address information.

3. 发明专利

JP2002133758A RECORD REPRODUCING DEVICE 失效
公开(公告)号：JP2002133758A
公开(公告)日：2002-05-10
申请号：JP2000320480
申请日：2000-10-20
申请人： VICTOR COMPANY OF JAPAN , MATSUSHITA ELECTRIC IND CO LTD
发明人： UEKI YASUHIRO , OSADA YUTAKA , YANAGISAWA OSAMU , IGUCHI MUTSUMI , KAMIOKA YUICHI , KONNO KOUJIYU
IPC分类号： G11B20/10 , G11B7/005 , G11B7/007 , G11B19/28 , G11B20/14 , G11B27/19 , G11B27/24 , G11B27/30 , G11B19/247
摘要： PROBLEM TO BE SOLVED: To detect a wobbling signal with high precision even when a noise component is superimposed on the wobbling signal in a record reproducing device. SOLUTION: The prerecording information signal SPPX amplified by an X-time amplifier 33 is applied to a limiter 101 by a wobbling signal extracting section 22, and the noise component of a prepit signal is removed based on an upper level limit signal SUL and a lower level limit signal SWL from a limit level generator 102. The signal SPPX is made to pass an LPF(low pass filter) 104, the SL signal passing the LPF is made to pass an HPF(high pass filter) 105, and the SB signal passing the HPF is binarized by a binarizing unit 107 and fed to a servo circuit 15 after the wobbling extraction signal SDTT is extracted from it. The SL signal passing the LPF or the SB signal passing the HPF is selected and adjusted in phase by a phase adjuster 102a, and the limit level signals SWL and SUL are generated by the limit level generator based on the signal SSW adjusted in phase.

4. 发明专利

JP2002109739A METHOD FOR RECORDING INFORMATION AND INFORMATION RECORDING APPARATUS 失效
公开(公告)号：JP2002109739A
公开(公告)日：2002-04-12
申请号：JP2000295734
申请日：2000-09-28
申请人： VICTOR COMPANY OF JAPAN , MATSUSHITA ELECTRIC IND CO LTD
发明人： EGUCHI HIDEJI , UEKI YASUHIRO , YANAGISAWA OSAMU , OSADA YUTAKA , KOISHI KENJI , USUI MAKOTO , KONNO KOUJIYU , KAMIOKA YUICHI
IPC分类号： G11B7/0045 , G11B7/125 , G11B7/126
摘要： PROBLEM TO BE SOLVED: To obtain a stable reproduced signal with low jitters even at the time of recording with a multi-pulse train for high density, by recognizing a recording state during a recording operation and performing control proper to the state. SOLUTION: A reflected light-amount from a LD (laser diode) 7 is detected by a reflected light-amount detecting photo diode 2. The band of a reflected light-amount detecting signal which is obtained through conversion of detection- current I into voltage using an I/V (current-to-voltage) converter 3 is limited using a LPF (low pass filter) 4. Therefore, a mean value Vmp of the reflected light-amount of the latter portion of the multi-pulse and an amount Vsp of the reflected light-amount during the period of time not forming a record mark are held using a sample hold circuit 1. A CPU 5 watches, as the recording state, a value of Vmp, or a difference (Vmp-Vsp) or a ratio (Vmp/Vsp) divided by an intensity of laser light which is set for forming a mark, and controls the intensity of laser light so as to be proper.

5. 发明专利

JP2006085803A Optical disk device 审中-公开
标题翻译：光盘设备
公开(公告)号：JP2006085803A
公开(公告)日：2006-03-30
申请号：JP2004268231
申请日：2004-09-15
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： KOSHIDA HIROSHI , HARUI MASANORI , NAKADA YASUO , SAKA YOSHIMITSU , KONNO KOUJIYU , KATADA MASAYASU
IPC分类号： G11B7/09 , G11B7/004
CPC分类号： G11B7/0948
摘要： PROBLEM TO BE SOLVED: To suppress the disturbance of tracking control even when a defective part such as a failure at an optical disk manufacturing stage is present in a recording surface.
SOLUTION: An output terminal 2 is connected to an optical pickup 1 to output a prior subbeam return light signal obtained by converting a prior subbeam return light before a main beam into an electric signal. A defect period detection circuit 5 detects a defect period where a beam passes through the defective part of an optical disk 8 based on the prior subbeam return light signal from the output terminal 2. A servo hold circuit 7 holds tracking servo during the detected defect period. Thus, even when a steep attenuation occurs in the amplitude of an RF signal during the defect period, the defect period is detected at the early stage of the attenuation to suppress a change in the amplitude of a tracking signal.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：即使当在记录表面中存在诸如光盘制造阶段的故障的缺陷部分时，也可以抑制跟踪控制的干扰。解决方案：输出端子2连接到光学拾取器1，以输出通过将主光束之前的先前子光束返回光转换为电信号而获得的先前子光束返回光信号。缺陷周期检测电路5根据来自输出端子2的现有子光束返回光信号，检测光束通过光盘8的缺陷部分的缺陷期间。伺服保持电路7在检测到的缺陷期间保持跟踪伺服。因此，即使当在缺陷期间RF信号的振幅发生陡峭的衰减时，也可以在衰减的早期阶段检测到缺陷周期，以抑制跟踪信号的振幅的变化。版权所有（C）2006，JPO＆NCIPI

6. 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.

7. 发明专利

JP2004079084A Optical disk unit 审中-公开
公开(公告)号：JP2004079084A
公开(公告)日：2004-03-11
申请号：JP2002238679
申请日：2002-08-20
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： KENJIYOU YOUICHI , KONNO KOUJIYU , MORISHITA TAKANOBU , KATADA MASAYASU
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To solve the problem of unstable control owing to a sample-and-hold error signal caused by disturbance noise or a circuit noise component when a sample-and-hold circuit generates a servo error signal such as a tracking error of an optical disk unit.
SOLUTION: The slew rate of the sample-and-hold circuit 24 is controlled on the basis a rotational speed signal SSP based on the rotational speed of a disk 1, and the pass of a noise signal is controlled to be able to realize stable control.
COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2001006190A OPTICAL DISK APPARATUS 失效
公开(公告)号：JP2001006190A
公开(公告)日：2001-01-12
申请号：JP17791899
申请日：1999-06-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ABE MASAYOSHI , YAMADA SHINICHI , KONNO KOUJIYU , IZUMI MITSUHIKO
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To reduce circuit elements and improve a stability by adjusting a gain of a variable amplification circuit to make a signal amplitude of reproduction signals of first and second pit arrays integrated by a low pass filter a specific value, and detecting a displacement of light beams and tracks from the reproduction signals of the integrated first and second pit arrays. SOLUTION: A first signal is sent via an LPF 146, a D/A converter 147 and an adder 148 to a power amplifier 129, whereby a transfer motor 114 is controlled in accordance with a low frequency component of a first TE signal. An output of an adder 130 becomes a total quantity of light received by a photodetector 113 and is sent to an address reproduction circuit 131. The address reproduction circuit 131 reproduces a sector address, sends to a DSP 140, sends a signal synchronous with the address to a gate generation circuit 132. A VFO1 signal and a VFO2 signal are delayed by a delay circuit by a predetermined time, logically synthesized to be a sampling signal.

9. 发明专利

JP2007102828A Wobble detection device 审中-公开
标题翻译：无线检测装置
公开(公告)号：JP2007102828A
公开(公告)日：2007-04-19
申请号：JP2005287360
申请日：2005-09-30
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： AZUMA KENGO , IZUMI MITSUHIKO , KATADA MASAYASU , KONNO KOUJIYU
IPC分类号： G11B7/005 , G11B20/10
摘要： PROBLEM TO BE SOLVED: To make it possible to more accurately detect a wobble signal and wobble incidental information in a wobble detection device. SOLUTION: Delay adjustment sections 101/102 adjust amounts of delay of a first signal and a second signal inputted respectively. Automatic gain adjustment sections 103/104 normalize amplitudes of the first signal and the second signal whose amounts of delay are adjusted in the delay adjustment sections 101/102 respectively. A difference signal generation section 105 generates a difference signal of the first signal and the second signal after normalization by the automatic gain adjustment sections 103/104. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：使得可以更准确地检测摆动信号和摆动摆动检测装置中的附带信息。解决方案：延迟调整部分101/102分别调节分别输入的第一信号和第二信号的延迟量。自动增益调整部103/104分别对延迟调整部101/102中的第一信号和延迟量的延迟量的第二信号的振幅进行归一化。差分信号生成部105通过自动增益调整部103/104生成归一化后的第一信号和第二信号的差分信号。版权所有（C）2007，JPO＆INPIT

10. 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

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