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1. 发明授权

US06388967B2 Liquid crystal driving signal generating apparatus and optical disk reproducing apparatus with liquid crystal driving signal generating apparatus 失效
标题翻译：具有液晶驱动信号发生装置的液晶驱动信号发生装置和光盘再现装置
公开(公告)号：US06388967B2
公开(公告)日：2002-05-14
申请号：US09055703
申请日：1998-04-07
申请人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao , Hiroaki Abe
发明人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao , Hiroaki Abe
IPC分类号： G11B7135
CPC分类号： G11B7/13927 , G11B7/0956 , G11B7/1369
摘要： A liquid crystal driving signal generating apparatus comprises a PWM signal generator, a low pass filter for limiting a frequency band of a PWM signal outputted from the PWM signal generator, a liquid crystal panel connected to an output of the low pass filter, and a control means for controlling the PWM signal generator. The control means controls the PWM signal generator such that the PWM signal generator generates a PWM signal with a duty ratio corresponding to a refractive index to be set in the liquid crystal panel.
摘要翻译：液晶驱动信号发生装置包括PWM信号发生器，用于限制从PWM信号发生器输出的PWM信号的频带的低通滤波器，连接到低通滤波器的输出的液晶面板，以及控制用于控制PWM信号发生器的装置。控制装置控制PWM信号发生器，使得PWM信号发生器产生一个与在液晶面板中设置的折射率对应的占空比的PWM信号。

2. 发明授权

US06078556A System for producing a liquid crystal driving signal 失效
标题翻译：用于产生液晶驱动信号的系统
公开(公告)号：US06078556A
公开(公告)日：2000-06-20
申请号：US84354
申请日：1998-05-27
申请人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao
发明人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao
IPC分类号： G11B7/09 , G11B7/00 , G11B7/135
CPC分类号： G11B7/13927 , G11B7/0956 , G11B7/1369
摘要： A CPU is provided for producing a control signal. In accordance with the control signal, a modulated signal modulated in pulse width by the control signal is produced. The modulated signal has a predetermined duty ratio based on the control signal. A liquid crystal driving signal having the duty ratio based on the modulated signal is produced. The CPU is for producing the control signal for setting the duty ratio in accordance with a refractive index at each of the unit electrode of the liquid crystal panel.
摘要翻译：提供用于产生控制信号的CPU。根据控制信号，产生通过控制信号以脉冲宽度调制的调制信号。调制信号基于控制信号具有预定的占空比。产生具有基于调制信号的占空比的液晶驱动信号。 CPU用于产生用于根据液晶面板的每个单位电极处的折射率来设置占空比的控制信号。

3. 发明授权

US5886496A Tilt servo controlling apparatus 失效
标题翻译：倾斜伺服控制装置
公开(公告)号：US5886496A
公开(公告)日：1999-03-23
申请号：US61865
申请日：1998-04-17
申请人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao
发明人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao
IPC分类号： G11B7/095 , G11B7/135 , B64C17/02
CPC分类号： G11B7/0956
摘要： A tilt servo controlling apparatus is provided with: an optical pickup for emitting a light beam onto an optical record medium and detecting a reflection light from the optical record medium to thereby output a detection signal; a level detecting device for detecting a level of the detection signal outputted by the optical pickup; a tilt error correcting device for correcting a tilt error due to an aberration, which is generated by a tilt angle between (i) a normal line of a surface of the optical record medium at a position irradiated with the light beam and (ii) an optical axis of the light beam; and a tilt error correction controlling device for outputting a control signal to control a correction amount of the tilt error correcting device, by giving a variation to the control signal on a time base and adjusting the control signal so that the level detected by the level detecting device be optimized with respect to the variation of the control signal.
摘要翻译：倾斜伺服控制装置具有：光学拾取器，用于将光束发射到光学记录介质上并检测来自光学记录介质的反射光，从而输出检测信号; 电平检测装置，用于检测由光学拾取器输出的检测信号的电平; 倾斜误差校正装置，用于校正由像差引起的倾斜误差，该倾斜误差校正装置是由（i）在光束照射的位置处的光学记录介质的表面的法线之间的倾斜角度产生的，（ii）光束的光轴; 以及倾斜误差校正控制装置，用于输出控制信号以控制倾斜误差校正装置的校正量，通过对时基上的控制信号进行变化并调整控制信号，使得由电平检测检测到的电平器件相对于控制信号的变化进行优化。

4. 发明授权

US6137754A Search method for information record medium 失效
标题翻译：信息记录介质的搜索方法
公开(公告)号：US6137754A
公开(公告)日：2000-10-24
申请号：US63374
申请日：1998-04-21
申请人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao
发明人： Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao
IPC分类号： G11B7/09 , G11B7/095 , G11B7/125 , G11B7/00
CPC分类号： G11B7/0956 , G11B7/0945 , G11B7/1369 , G11B7/13925
摘要： A searching method for an information record medium has: an initial value data preparing process of (i) performing a search for a plurality of sampling positions arranged in a radial direction on the information record medium, (ii) actuating a tilt servo to correct an error due to a tilt of an optical axis of a light beam emitted onto the information record medium from a normal line of a surface of the information record medium at each of the sampling positions, (iii) extracting a tilt correction amount after the tilt servo is stabilized for each of the sampling positions and (iv) storing the extracted tilt correction amount in relation to respective one of the sampling positions corresponding to the extracted tilt correction amount into a memory as initial value data of the tilt correction amount in advance; an initial value determining process for determining an initial value of the tilt correction amount at a search target position of the search when the search is to be performed, on the basis of a content of the initial value data stored in the memory; and a tilt servo process for performing the tilt servo at the search target position by use of the initial value determined by the initial value determining process.
摘要翻译：一种用于信息记录介质的搜索方法具有：初始值数据准备处理，（i）在所述信息记录介质上对径向布置的多个采样位置进行搜索，（ii）致动倾斜伺服以校正由于在每个采样位置从信息记录介质的表面的法线发射到信息记录介质上的光束的倾斜倾斜的误差，（iii）在倾斜伺服之后提取倾斜校正量针对每个采样位置稳定，并且（iv）预先将倾斜校正量的初始值数据作为倾斜校正量的初始值数据存储到与提取的倾斜校正量相对应的相应的一个采样位置的提取的倾斜校正量作为存储器; 初始值确定处理，用于根据存储在存储器中的初始值数据的内容，确定要执行搜索时的搜索的搜索目标位置处的倾斜校正量的初始值; 以及用于通过使用由初始值确定处理确定的初始值在搜索目标位置执行倾斜伺服的倾斜伺服处理。

5. 发明授权

US5859818A Tilt servo apparatus for use in optical disc reproducing apparatus 失效
标题翻译：用于光盘再现装置的倾斜伺服装置
公开(公告)号：US5859818A
公开(公告)日：1999-01-12
申请号：US899334
申请日：1997-07-23
申请人： Kiyoshi Tateishi , Sakashi Ohtaki , Noriaki Murao
发明人： Kiyoshi Tateishi , Sakashi Ohtaki , Noriaki Murao
IPC分类号： G11B7/095 , G11B7/125 , G11B7/135 , G11B7/00
CPC分类号： G11B7/0956 , G11B7/1369 , G11B7/13927
摘要： A tilt servo apparatus in an optical disc reproducing apparatus operates promptly and certainly when reading recording information of an optical disc recorded at high density. The tilt servo apparatus is used in an optical disc reproducing apparatus having an optical pickup including a liquid crystal panel for an aberration correction on which a transparent electrode is formed and divided into segments of predetermined shapes, and irradiating a laser beam via the liquid crystal panel for the aberration correction and the objective lens, and receiving an obtained reflection light. The tilt servo apparatus has: tilt detecting for detecting a signal corresponding to a tilting angle in a radial direction between the information recording surface of the optical disc and an optical axis of the objective lens; and a driving circuit for variably driving voltages which are applied to the divided portions of the liquid crystal panel, respectively. The driving circuit drives so that predetermined voltages are applied to the respective divided segments of the liquid crystal panel according to a detection output of the tilt detecting and a phase difference between respective laser beams passing through the divided portions is adjusted, thereby correcting the aberration of the objective lens inclined at the tilting angle relative to the information recording surface of the optical disc.
摘要翻译：当读取以高密度记录的光盘的记录信息时，光盘再现装置中的倾斜伺服装置操作迅速且肯定。倾斜伺服装置用于具有光拾取器的光盘再现装置，该光学拾取器包括用于像差校正的液晶面板，其上形成有透明电极并被分成预定形状的段，并且经由液晶面板照射激光束用于像差校正和物镜，并且接收所获得的反射光。倾斜伺服装置具有：用于检测与光盘的信息记录表面和物镜的光轴之间的径向倾斜角相对应的信号的倾斜检测; 以及用于分别施加到液晶面板的分割部分的可变驱动电压的驱动电路。驱动电路驱动，使得根据倾斜检测的检测输出将预定电压施加到液晶面板的各个分割段，并且调节通过分割部分的各个激光束之间的相位差，从而校正物镜相对于光盘的信息记录表面倾斜倾斜角度。

6. 发明申请

US20090232174A1 SEMICONDUCTOR LASER DRIVING DEVICE AND SEMICONDUCTOR LASER DRIVING METHOD 失效
标题翻译：半导体激光器驱动器件和半导体激光器驱动方法
公开(公告)号：US20090232174A1
公开(公告)日：2009-09-17
申请号：US11910282
申请日：2006-03-30
申请人： Junichi Furukawa , Kiyoshi Tateishi
发明人： Junichi Furukawa , Kiyoshi Tateishi
IPC分类号： H01S3/00
CPC分类号： G11B7/1263 , G11B7/0062 , H01S5/0617 , H01S5/06804 , H01S5/06832
摘要： A semiconductor laser driving device is mounted on an information recording/reproducing device or the like, and is suitably used for recording and reproducing information. The semiconductor laser driving device is provided with a semiconductor laser for emitting laser beams, and a temperature detecting means for detecting a temperature of the semiconductor laser, and changes an output of the laser beams based on the detected temperature. Thus, the semiconductor laser driving means can suitably improve response characteristics of the semiconductor laser, irrespective of the temperature of the semiconductor laser. Therefore, the semiconductor laser driving device can ensure recording performance to an optical disc without being affected by the temperature of the semiconductor laser.
摘要翻译：半导体激光器驱动装置安装在信息记录/再现装置等上，适用于记录和再现信息。半导体激光器驱动装置设置有用于发射激光束的半导体激光器和用于检测半导体激光器的温度的温度检测装置，并且基于检测到的温度改变激光束的输出。因此，与半导体激光器的温度无关，半导体激光器驱动装置可以适当地改善半导体激光器的响应特性。因此，半导体激光驱动装置可以确保对光盘的记录性能而不受半导体激光器的温度的影响。

7. 发明授权

US07164631B2 Information recording apparatus 失效
标题翻译：信息记录装置
公开(公告)号：US07164631B2
公开(公告)日：2007-01-16
申请号：US10452223
申请日：2003-06-03
申请人： Kiyoshi Tateishi , Junichi Furukawa
发明人： Kiyoshi Tateishi , Junichi Furukawa
IPC分类号： G11B7/125
CPC分类号： G11B7/1263 , G11B7/0045 , G11B7/09 , G11B7/0901 , G11B7/0908
摘要： An information recording apparatus is provided, which can control over the power of light beams emitted from a light source and various types of servo control with higher accuracy. A laser beam is emitted from a semiconductor laser to write information onto an optical disc. A detection signal indicative of the power of the laser beam output from a light-receiving device is sampled and held with a sample and hold circuit via an I-V converter at a timing delayed by the time corresponding to the delay time of the I-V converter. A tracking error generation circuit and a focus error generation circuit generate a tracking error signal and a focus error signal, respectively, on the basis of a detection signal having information about tracking error and focus error and output from a light-receiving device. Sample and hold circuits sample and hold the tracking error signal and the focus error signal at a timing delayed by the time corresponding to the delay time of each of the generation circuits, respectively. Power control, tracking servo, and focus servo are performed using each of the signals held by the sample and hold circuits, respectively.
摘要翻译：提供一种信息记录装置，其能够以更高精度控制从光源发射的光束的功率和各种类型的伺服控制。从半导体激光器发射激光束以将信息写入光盘。表示从光接收装置输出的激光束的功率的检测信号在延迟了与I-V转换器的延迟时间相对应的时间的定时通过I-V转换器采样和保持电路。基于具有关于跟踪误差和聚焦误差的信息的检测信号以及光接收装置的输出，跟踪误差产生电路和聚焦误差产生电路分别产生跟踪误差信号和聚焦误差信号。采样和保持电路分别在与延迟时间相对应的时间分别采样和保持跟踪误差信号和聚焦误差信号。功率控制，跟踪伺服和聚焦伺服分别由采样和保持电路保持的每个信号执行。

8. 发明申请

US20060182158A1 Information recording reproduction apparatus and information reproduction method 审中-公开
标题翻译：信息记录再现装置和信息再现方法
公开(公告)号：US20060182158A1
公开(公告)日：2006-08-17
申请号：US11352322
申请日：2006-02-13
申请人： Kiyoshi Tateishi , Junichi Furukawa
发明人： Kiyoshi Tateishi , Junichi Furukawa
IPC分类号： H01S3/00
CPC分类号： G11B7/1263 , G11B7/126 , H01S5/0427
摘要： An information recording reproduction apparatus includes a laser light source, a laser driving unit which supplies a laser driving signal to the laser light source to make it emit a laser light for recording and reproduction, a high frequency superimposing unit which superimposes a high frequency signal to a laser driving signal and a duty controlling unit which controls a duty ratio of the high frequency signal. The high frequency superimposing unit superimposes the high frequency signal on the laser driving signal driving the laser light source in order to prevent an effect due to a return light from an optical disc. The duty controlling unit controls the duty ratio of the high frequency signal so that generation of a higher harmonic component in the high frequency signal is decreased or so that the duty ratio becomes approximately 50%, for example.
摘要翻译：一种信息记录再现装置，包括激光光源，将激光驱动信号提供给激光光源以使其发射用于记录和再现的激光的激光驱动单元，将高频信号叠加的高频叠加单元激光驱动信号和占空比控制单元，其控制高频信号的占空比。高频叠加单元将高频信号叠加在驱动激光光源的激光驱动信号上，以防止由于来自光盘的返回光的影响。占空比控制单元控制高频信号的占空比，使得高频信号中的高次谐波分量的产生减少，或者例如占空比变为约50％。

9. 发明授权

US6151154A Optical pickup, aberration correction unit and astigmatism measurement method 有权
标题翻译：光学拾取，像差校正单元和像散测量方法
公开(公告)号：US6151154A
公开(公告)日：2000-11-21
申请号：US265892
申请日：1999-03-11
申请人： Masakazu Ogasawara , Yoshitsugu Araki , Sakashi Ootaki , Junichi Furukawa , Kiyoshi Tateishi
发明人： Masakazu Ogasawara , Yoshitsugu Araki , Sakashi Ootaki , Junichi Furukawa , Kiyoshi Tateishi
IPC分类号： G02F1/1343 , G02F1/139 , G11B7/00 , G11B7/135 , G02F1/01
CPC分类号： G11B7/13925 , G02F1/134309 , G02F1/1393 , G11B7/1369 , G02F2203/18 , G11B2007/0006
摘要： An optical pickup includes: a light source, an object lens, and an aberration correction unit for correcting aberration by giving a phase difference to a light beam. The aberration correction unit corrects astigmatism caused by an optical system of the optical pickup.
摘要翻译：光学拾取器包括：光源，物镜，以及用于通过给光束赋予相位差来校正像差的像差校正单元。像差校正单元校正由光学拾取器的光学系统引起的像散。

10. 发明授权

US5796691A Spindle servo system for adjusting rotational speed in optical disk player 失效
标题翻译：用于调整光盘播放机转速的主轴伺服系统
公开(公告)号：US5796691A
公开(公告)日：1998-08-18
申请号：US773034
申请日：1996-12-24
申请人： Junichi Furukawa , Kiyoshi Tateishi
发明人： Junichi Furukawa , Kiyoshi Tateishi
IPC分类号： G11B20/14 , G11B7/007 , G11B19/28 , G11B5/09
CPC分类号： G11B19/28
摘要： A spindle servo system roughly adjusts a rotational speed of a spindle motor for rotationally driving an optical disk at a specified speed in an optical disk player for reproducing digital data composed of run length limited codes and synchronizing signals, wherein the run length limited codes are restricted between a minimum run length and a maximum run length, and wherein the synchronizing signals are composed of a maximum bit pattern with a run length longer than the maximum run length and an additional bit pattern disposed just before or after the maximum bit pattern with a run length longer than the minimum run length and shorter than the maximum run length, the spindle servo system. The spindle servo system includes a pickup detector for reading the digital data from the optical disk; pattern detecting means for detecting a synchronizing signal composed of the maximum bit pattern and the additional bit pattern from the digital data read by the pickup detector; period detecting means for detecting a period of the synchronizing signal, the period including the maximum bit pattern and the additional bit pattern detected by the pattern detector; and motor for controlling the rotational speed of the spindle motor to maintain the period detected by the period detector at a predetermined value.
摘要翻译：主轴伺服系统在用于再现由游程长度限制代码和同步信号组成的数字数据的光盘播放器中大致调整主轴电机的旋转驱动光盘的转速，其中游程长度限制代码被限制在最小游程长度和最大游程长度之间，并且其中所述同步信号由具有长于所述最大游程长度的游程长度的最大比特模式和在所述最大比特模式之前或之后设置的附加比特模式组合，长度大于最小行程长度，短于最大行程长度，主轴伺服系统。主轴伺服系统包括用于从光盘读取数字数据的拾取检测器; 模式检测装置，用于从由拾取检测器读取的数字数据中检测由最大位模式和附加位模式组成的同步信号; 周期检测装置，用于检测同步信号的周期，包括由图案检测器检测的最大位模式和附加位模式的周期; 以及用于控制主轴电动机的转速以将周期检测器检测到的周期保持在预定值的电动机。

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