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1. 发明授权

US4835752A Device for driving and controlling optical head for use in optical disk system 失效
标题翻译：用于驱动和控制用于光盘系统的光头的装置
公开(公告)号：US4835752A
公开(公告)日：1989-05-30
申请号：US132167
申请日：1987-12-14
申请人： Keiji Nakatsu , Shigeo Hayashi , Masaharu Ogawa , Osamu Itou , Isao Watanabe , Kunimaro Tanaka
发明人： Keiji Nakatsu , Shigeo Hayashi , Masaharu Ogawa , Osamu Itou , Isao Watanabe , Kunimaro Tanaka
IPC分类号： G11B7/085
CPC分类号： G11B7/08529 , G11B7/08517
摘要： A device for driving and controlling an optical head by forming a spot of a light beam on an optical disk having a plurality of tracks and detecting light from the spot reflected on the optical disk by a pair of optical detectors disposed in the head. This device has: a head actuator for moving a movable portion of the optical head in the radial direction of the disk; a speed detector for detecting the track-crossing speed of the spot from outputs from the optical detectors; a reference speed generator for generating, while accessing to a target track, a reference moving speed signal in accordance with the distance to the target track obtained from the outputs from the optical detectors, the movable head portion being moved on the basis of the reference moving speed signal so that the speed of the movable portion decreases at a position near the target track before the light beam spot reaches this track; a speed error detector for obtaining the difference between outputs from the reference speed generator and the speed detector; and a magnification change circuit adapted for amplifying the outputs from the reference speed generator and the speed detector by a predetermined multiplying factor when the distance between the light beam spot and the target track, or the crossing speed of the spot, becomes smaller than a predetermined value, the magnification change circuit also being adapted for outputting the difference obtained by the speed error detector after multiplying it by the reciprocal of the multiplying factor. The head actuator is driven on the basis of the output from the error detector so as to control the speed of the movable head portion.
摘要翻译：一种用于通过在具有多个轨道的光盘上形成光束点并且通过设置在头部中的一对光学检测器从光盘上反射的光点检测光来驱动和控制光学头的装置。该装置具有：头致动器，用于沿光盘的径向方向移动光头的可移动部分; 速度检测器，用于从光学检测器的输出检测光斑的跟踪交叉速度; 参考速度发生器，用于在根据从所述光学检测器的输出获得的与所述目标轨迹的距离的同时访问目标轨道时生成参考移动速度信号，所述可移动头部基于所述参考移动来移动使得在光束点到达该轨道之前，可动部分的速度在靠近目标轨道的位置处减小; 用于获得来自基准速度发生器和速度检测器的输出之间的差的速度误差检测器; 以及放大率变化电路，其适用于当光束光点与目标光道之间的距离或点的交叉速度变得小于预定的倍数时，以基准速度发生器和速度检测器的输出放大预定的倍率值，倍率变化电路也适于输出由速度误差检测器乘以乘法乘数后的差值。基于来自误差检测器的输出来驱动头致动器，以便控制可动头部的速度。

2. 发明授权

US4887254A Optical disk drive device for positioning a carriage to a retract position 失效
标题翻译：用于将托架定位到缩回位置的光盘驱动装置
公开(公告)号：US4887254A
公开(公告)日：1989-12-12
申请号：US172525
申请日：1988-03-24
申请人： Keiji Nakatsu , Katsuaki Kamitsu , Masaharu Ogawa
发明人： Keiji Nakatsu , Katsuaki Kamitsu , Masaharu Ogawa
IPC分类号： H04N5/85 , G11B7/085 , G11B19/20 , G11B21/12 , G11B21/22
CPC分类号： G11B19/20 , G11B7/08582
摘要： A retract device includes a signal instruction circuit for providing the number of tracks to be traversed, the access start instruction, and the retract instruction and the reference voltage generating circuit responsive to these instructions to provide the residual track number and the carriage moving signal and operates such that, immediately before the drive device is to stop operating a carriage having an optical head mounted thereon is moved by an access operation from a track to a first predetermined position according to the access start instruction, and is then moved from the first predetermined position to a second predetermined position according to the retract instruction at a predetermined reference speed.

3. 发明授权

US4955009A Optical disk drive apparatus having counter disable at seek start-up 失效
标题翻译：在寻道启动时具有计数器禁用的光盘驱动装置
公开(公告)号：US4955009A
公开(公告)日：1990-09-04
申请号：US184985
申请日：1988-04-22
申请人： Keiji Nakatsu , Masaharu Ogawa
发明人： Keiji Nakatsu , Masaharu Ogawa
IPC分类号： G11B7/085 , G11B21/08
CPC分类号： G11B7/08541
摘要： In an optical disk drive apparatus for driving an optical disk having tracks for recording information, an optical head focuses a light beam onto a spot on a track on the optical disk, and an actuator moves the optical head, thereby causing the spot of the light beam to move from its current track to a target track in order to access the target track. A track counter counts the tracks moved by the spot of the light beam. The counting of tracks is disabled for an interval at the start of each track access operation to prevent miscounting caused by jitter that occurs when initiating a track access operation.

4. 发明授权

US4788421A Apparatus for controlling relative movement of an optical head to an optical disk with velocity detection 失效
标题翻译：用于通过速度检测来控制光头相对于光盘的相对移动的装置
公开(公告)号：US4788421A
公开(公告)日：1988-11-29
申请号：US863026
申请日：1986-05-14
申请人： Masaharu Ogawa , Keiji Nakatsu
发明人： Masaharu Ogawa , Keiji Nakatsu
IPC分类号： G11B7/085 , G11B7/09 , G01J1/20
CPC分类号： G11B7/0946 , G11B7/08529
摘要： A control apparatus comprises a linear actuator (49) which moves an optical head (37) having a photo detector (45) in a radial direction of an optical disk (33), a velocity detection circuit (57) which detects relative moving velocity of the optical head (37) to the optical disk (33) during track accessing, and a linear actuator drive control circuit (50) which controls the actuator (49) in response to the detected velocity. The velocity detection circuit (57) generates a digital signal which corresponds to a cycle of an RF output signal of the photo detector (45) and, in response to this digital signal, it further generates an analog signal, which corresponds to the inverse of the cycle of the RF signal, to be outputted as the relative moving velocity of the optical head (37).
摘要翻译：控制装置包括线性致动器（49），其沿着光盘（33）的径向移动具有光检测器（45）的光学头（37），速度检测电路（57），其检测相对移动速度轨道存取期间到光盘（33）的光头（37），以及响应于检测到的速度控制致动器（49）的线性致动器驱动控制电路（50）。速度检测电路（57）产生对应于光检测器（45）的RF输出信号的周期的数字信号，并且响应于该数字信号，其进一步产生模拟信号，其对应于 RF信号的周期作为光头（37）的相对移动速度输出。

5. 发明申请

US20120298457A1 DISC BRAKE APPARATUS 有权
标题翻译：碟形刹车装置
公开(公告)号：US20120298457A1
公开(公告)日：2012-11-29
申请号：US13576580
申请日：2011-05-19
申请人： Masaharu Ogawa
发明人： Masaharu Ogawa
IPC分类号： F16D65/095 , B60T1/06 , F16D55/228
CPC分类号： F16D65/095 , F16D65/0977 , F16D2055/007 , F16D2055/0091 , F16D2121/02
摘要： A back plate is biased radially inward of a disc rotor by a spring, engaged at two locations on a torque reception surface with a caliper support shaft, and engaged at one location on a torque reception surface with a caliper support shaft. Inner and outer shims are disposed toward a back plate and pistons, respectively, and a friction factor between the back plate and the inner shim and that between the pistons and the outer shim are higher than that between the inner and outer shims. The inner shim is movable with the back plate in radial and circumferential directions and is movable relative to the back plate in the axial direction, and the outer shim is movable with the back plate in radial and circumferential directions, is movable relative to the back plate in the axial direction, and is rotatable about the radially inner support shaft axis.
摘要翻译：背板通过弹簧径向向内偏置于盘转子的内侧，在具有卡钳支撑轴的转矩接收表面上的两个位置处接合，并且在具有卡钳支撑轴的扭矩接收表面上的一个位置处接合。内垫片和外垫片分别设置在背板和活塞上，并且背板和内垫片之间的摩擦系数以及活塞和外垫片之间的摩擦系数高于内垫片和外垫片之间的摩擦系数。内垫片可以沿着背板在径向和圆周方向上移动并且可以相对于后板在轴向方向上移动，并且外垫片可以在背板的径向和圆周方向上移动，可相对于后板移动在轴向方向上，并且可绕径向内部支撑轴轴线旋转。

6. 发明授权

US08045441B2 Optical disc and optical disc device 有权
公开(公告)号：US08045441B2
公开(公告)日：2011-10-25
申请号：US11878465
申请日：2007-07-24
申请人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
发明人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
IPC分类号： G11B7/20
CPC分类号： G11B27/329 , G11B7/00736 , G11B7/0079 , G11B7/0945 , G11B7/1275 , G11B7/24038 , G11B19/122 , G11B20/1217 , G11B27/105 , G11B2007/0006 , G11B2007/0013 , G11B2220/235
摘要： In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.

7. 发明授权

US07889613B2 Optical disc and optical disc device 有权
公开(公告)号：US07889613B2
公开(公告)日：2011-02-15
申请号：US11978611
申请日：2007-10-30
申请人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
发明人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
IPC分类号： G11B7/00
CPC分类号： G11B27/329 , G11B7/00736 , G11B7/0079 , G11B7/0945 , G11B7/1275 , G11B7/24038 , G11B19/122 , G11B20/1217 , G11B27/105 , G11B2007/0006 , G11B2007/0013 , G11B2220/235
摘要： In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.

8. 发明申请

US20100252743A1 IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, IMAGE PROCESSING PROGRAM, AND INFORMATION STORAGE MEDIUM HAVING IMAGE PROCESSING PROGRAM STORED THEREIN 有权
标题翻译：图像处理设备，图像处理方法，图像处理程序和存储图像处理程序的信息存储介质
公开(公告)号：US20100252743A1
公开(公告)日：2010-10-07
申请号：US12671208
申请日：2008-07-15
申请人： Masaharu Ogawa , Nobuyuki Iwasaki , Takao Kuwabara
发明人： Masaharu Ogawa , Nobuyuki Iwasaki , Takao Kuwabara
IPC分类号： G01T1/24
CPC分类号： A61B6/4233 , A61B6/502 , A61B6/585 , G01T1/247 , H01L27/14623 , H01L27/14676 , H04N5/32 , H04N5/357
摘要： A first leakage current value output from each signal line is stored in a storage unit, with a charge corresponding to an emitted radiation being held in a radiographic image detector, when the radiation is uniformly emitted to the radiographic image detector. A second leakage current value is acquired which is output from each signal line, with a charge corresponding to the radiation dose being held in the radiographic image detector, when the radiation passing through an object is emitted to the radiographic image detector. When the first and second leakage current values are equal to each other for each line corresponding to each signal line, all pixels on the line are determined to belong to a background area (lines A and C). When the second leakage current value is smaller than the first leakage current value and larger than a predetermined value, it is determined that there are the object areas and the background areas on the line (lines B, D, and E), and the total number of pixels in the background area on the line is calculated from the ratio of the first leakage current value to the second leakage current value. In this way, the distribution of the object area and the background area in the image which is held in the radiographic image detector when the radiation passing through the object is emitted is estimated before the reading of the image from the radiographic image detector is completed.
摘要翻译：当辐射被均匀地发射到放射线照相图像检测器时，从每个信号线输出的第一泄漏电流值被存储在存储单元中，其中对应于发射的辐射的电荷被保持在放射线照相图像检测器中。当通过物体的辐射被发射到射线照相图像检测器时，获取从每个信号线输出的第二泄漏电流值，其中对应于辐射剂量的电荷被保持在放射线照相图像检测器中。当对于每个信号线的每一行的第一和第二泄漏电流值彼此相等时，该行上的所有像素被确定为属于背景区域（行A和C）。当第二漏电流值小于第一泄漏电流值并且大于预定值时，确定在线（线B，D和E）上存在物体区域和背景区域，并且总共根据第一泄漏电流值与第二泄漏电流值的比率，计算线路背景区域中的像素数。以这种方式，在从放射线照相图像检测器读取图像完成之前，估计当通过物体的辐射被发射时保持在放射线照相图像检测器中的图像中的对象区域和背景区域的分布。

9. 发明授权

US07773485B2 Optical disc and optical disc device 有权
标题翻译：光盘和光盘设备
公开(公告)号：US07773485B2
公开(公告)日：2010-08-10
申请号：US11657029
申请日：2007-01-24
申请人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
发明人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
IPC分类号： G11B7/00
CPC分类号： G11B27/329 , G11B7/00736 , G11B7/0079 , G11B7/0945 , G11B7/1275 , G11B7/24038 , G11B19/122 , G11B20/1217 , G11B27/105 , G11B2007/0006 , G11B2007/0013 , G11B2220/235
摘要： In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time.In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.
摘要翻译：在具有符合多个不同光盘标准的信息层的多层光盘中，由于每个信息层的类型不被记录在其他信息层中，所以在兼容的光盘装置的读写操作中，符合多个光盘标准，每次被访问的信息层都改变时，必须读取信息层的类型，并选择一种生成适合于信息层类型的跟踪误差信号的方法，因此访问需要时间。为了解决上述问题，在根据本发明的具有符合多个不同光盘标准的信息层的光学多层盘中，在信息层之一中的区域中记录关于其他信息层的信息。可以通过使用该信息来选择跟踪误差信号生成方法来减少访问其他信息层所需的时间。

10. 发明申请

US20070263497A1 Optical disc and optical disc device 有权
公开(公告)号：US20070263497A1
公开(公告)日：2007-11-15
申请号：US11878461
申请日：2007-07-24
申请人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
发明人： Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
IPC分类号： G11B7/00
CPC分类号： G11B27/329 , G11B7/00736 , G11B7/0079 , G11B7/0945 , G11B7/1275 , G11B7/24038 , G11B19/122 , G11B20/1217 , G11B27/105 , G11B2007/0006 , G11B2007/0013 , G11B2220/235
摘要： In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.

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