公开(公告)号：US5235590A

公开(公告)日：1993-08-10

申请号：US851537

申请日：1992-03-13

申请人： Masakazu Taguchi ,  Akio Futamata ,  Masaharu Moritsugu ,  Haruhiko Izumi

发明人： Masakazu Taguchi ,  Akio Futamata ,  Masaharu Moritsugu ,  Haruhiko Izumi

IPC分类号： G11B11/105 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14

CPC分类号： G11B20/10222 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10597 ,  G11B20/10009 ,  G11B20/1217 ,  G11B20/1426 ,  G11B2220/2525

摘要： A read out apparatus reads out prerecorded information from a magneto-optic disk by detecting intervals of edges of magnetic domains formed on the magneto-optic disk with different directions of magnetization, where the intervals of the edges of the magnetic domains correspond to data "1"s or "0""1"s of the prerecorded information. The read out apparatus includes a first part for producing a read out signal by scanning the magnetic domains of the magneto-optic disk, a second part for producing an edge detection signal which has rising and falling edges depending on leading and trailing edges of the magnetic domains, and for corecting edge positions of the edge detection signal based on predetermined information, a third part including a phase locked loop circuit for producing a clock signal which is synchronized to the rising and falling edges of the edge detection signal, and a fourth part for separating the data from the edge detection signal output from the second part using the clock signal output from the third part.

公开(公告)号：US4785443A

公开(公告)日：1988-11-15

申请号：US929785

申请日：1986-11-13

申请人： Akira Minami ,  Akio Futamata

发明人： Akira Minami ,  Akio Futamata

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/125 ,  G11B19/04

CPC分类号： G11B7/126 ,  G11B19/04

摘要： A light control circuit of an optical disc system for controlling light from a light emitting element at a read power level even if a write data operation is performed. The light control circuit includes a light control circuit, a superimposedly energizing circuit for providing a light for data write and a subtraction circuit for subtracting a predetermined current from a light sensing element. A light control circuit may further include a reference value setting circuit for automatically finding and determining reference values of a read power level, a write power level, and a subtraction value. The reference values may be defined with respect to an origin of the characteristic of the light emitting element where a current flowing through the light emitting element is substantially zero. Alternatively, the reference values may be defined with respect to another origin of the characteristic of the light emitting element where a current flowing through the light emitting element is near to a current providing the first predetermined level.

摘要翻译： 即使执行了写入数据操作，光盘系统的光控制电路用于控制来自发光元件的读出功率电平的光。 光控制电路包括光控制电路，用于提供用于数据写入的光的叠加通电电路和用于从光感测元件减去预定电流的减法电路。 光控制电路还可以包括用于自动查找和确定读功率电平，写功率电平和减法值的参考值的参考值设置电路。 参考值可以相对于发光元件的特征的原点定义，其中流过发光元件的电流基本为零。 或者，可以相对于发光元件的特性的另一原点定义参考值，其中流过发光元件的电流接近提供第一预定电平的电流。

公开(公告)号：US07275166B2

公开(公告)日：2007-09-25

申请号：US11089137

申请日：2005-03-24

申请人： Yoshihiko Kaiju ,  Shoichi Yoshida ,  Yoshitaka Murakawa ,  Akio Futamata ,  Katsuyoshi Ito

发明人： Yoshihiko Kaiju ,  Shoichi Yoshida ,  Yoshitaka Murakawa ,  Akio Futamata ,  Katsuyoshi Ito

IPC分类号： G00F1/26

CPC分类号： G06F1/30 ,  G06F1/3221 ,  G06F1/3268 ,  G06F3/0625 ,  G06F3/0634 ,  G06F3/0653 ,  G06F3/0676 ,  G11B19/00 ,  Y02D10/154

摘要： Provided is a power saving control method and system for data storage devices or electrical equipment. Herein, data items are divided into groups according to required response times or access frequencies. The groups of data items are allocated to data storage devices or pieces of electrical equipment. A data storage device or electrical equipment to which data that may be accessed using a long response time at a low access frequency is set to a power-saving mode of a higher level. Consequently, the data storage devices or pieces of electrical equipment are provided with power-saving features of different levels. Eventually, energy saving can be achieved more efficiently.

摘要翻译： 提供了一种用于数据存储装置或电气设备的节电控制方法和系统。 这里，根据所需的响应时间或访问频率将数据项分成组。 数据项目组分配给数据存储设备或电气设备。 可以使用低访问频率的长响应时间访问的数据的数据存储装置或电气设备被设定为较高级别的省电模式。 因此，数据存储设备或电气设备的设备具有不同级别的省电特征。 最终可以更有效地实现节能。

公开(公告)号：US20050273638A1

公开(公告)日：2005-12-08

申请号：US11089137

申请日：2005-03-24

申请人： Yoshihiko Kaiju ,  Shoichi Yoshida ,  Yoshitaka Murakawa ,  Akio Futamata ,  Katsuyoshi Ito

发明人： Yoshihiko Kaiju ,  Shoichi Yoshida ,  Yoshitaka Murakawa ,  Akio Futamata ,  Katsuyoshi Ito

IPC分类号： G06F1/30 ,  G06F1/32 ,  G06F3/06 ,  G11B19/00

CPC分类号： G06F1/30 ,  G06F1/3221 ,  G06F1/3268 ,  G06F3/0625 ,  G06F3/0634 ,  G06F3/0653 ,  G06F3/0676 ,  G11B19/00 ,  Y02D10/154

摘要： Provided is a power saving control method and system for data storage devices or electrical equipment. Herein, data items are divided into groups according to required response times or access frequencies. The groups of data items are allocated to data storage devices or pieces of electrical equipment. A data storage device or electrical equipment to which data that may be accessed using a long response time at a low access frequency is set to a power-saving mode of a higher level. Consequently, the data storage devices or pieces of electrical equipment are provided with power-saving features of different levels. Eventually, energy saving can be achieved more efficiently.

摘要翻译： 提供了一种用于数据存储装置或电气设备的节电控制方法和系统。 这里，根据所需的响应时间或访问频率将数据项分成组。 数据项目组分配给数据存储设备或电气设备。 可以使用低访问频率的长响应时间访问的数据的数据存储装置或电气设备被设定为较高级别的省电模式。 因此，数据存储设备或电气设备的设备具有不同级别的省电特征。 最终可以更有效地实现节能。

公开(公告)号：US5440533A

公开(公告)日：1995-08-08

申请号：US320378

申请日：1994-10-11

申请人： Tohru Fujimaki ,  Akio Futamata ,  Yasuyuki Ozawa

发明人： Tohru Fujimaki ,  Akio Futamata ,  Yasuyuki Ozawa

IPC分类号： G11B11/10 ,  G11B7/085 ,  G11B7/09 ,  G11B7/12 ,  G11B11/105

CPC分类号： G11B7/0935 ,  G11B7/08576 ,  G11B7/093 ,  G11B7/0933 ,  G11B7/123

摘要： An optical head unit includes a motor having a stator and a rotor which is mounted rotatably on the stator, at least the rotor having a generally disk-shaped (i.e., circular or polygonal) configuration, and an optical system mounted on a common, main surface of the rotor. The optical system includes a light emitting part for emitting a light beam, a focus actuator, an objective lens provided on the focus actuator, and a light beam receiving part. The light beam emitted from the light emitting part is output via the objective lens, and light received via the objective lens is received by the light receiving part.

摘要翻译： 光头单元包括具有定子和可旋转地安装在定子上的转子的电动机，至少转子具有大致圆盘形（即圆形或多边形）结构，以及安装在公共主体上的光学系统 转子表面。 光学系统包括用于发射光束的光发射部分，聚焦致动器，设置在聚焦致动器上的物镜和光束接收部分。 从发光部射出的光束经由物镜输出，经由物镜接收的光被光接收部接收。