公开(公告)号：US20090109809A1

公开(公告)日：2009-04-30

申请号：US12258359

申请日：2008-10-24

Applicant: Kazuto Kuroda ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Takashi Usui ,  Masahiro Saito

Inventor： Kazuto Kuroda ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Takashi Usui ,  Masahiro Saito

IPC: G11B7/00

CPC classification number: G11B7/1263 ,  G11B7/00456

Abstract: According to one embodiment, a laser drive circuit includes a photodetector which receives part of laser light emitted from a laser element to a recording medium independently of reflection laser light reflected by the recording medium, and outputs an output corresponding to the strength thereof, an integration circuit which integrates the output from the photodetector for a predetermined time, and a setting circuit which sets the intensity of a laser drive current supplied to the laser element on the basis of the output from the integration circuit.

Abstract translation: 根据一个实施例，激光驱动电路包括光电检测器，其独立于由记录介质反射的反射激光，将从激光元件发射的激光的一部分接收到记录介质，并且输出与其强度对应的输出， 电路，其将来自光电检测器的输出积分预定时间;以及设置电路，其根据积分电路的输出设定提供给激光元件的激光驱动电流的强度。

公开(公告)号：US07345984B2

公开(公告)日：2008-03-18

申请号：US11563550

申请日：2006-11-27

Applicant: Kazuo Watabe ,  Hideo Ando ,  Sumitaka Maruyama ,  Yutaka Kashihara ,  Akihito Ogawa

Inventor： Kazuo Watabe ,  Hideo Ando ,  Sumitaka Maruyama ,  Yutaka Kashihara ,  Akihito Ogawa

IPC: G11B7/00

CPC classification number: G11B20/1217 ,  G11B7/0045 ,  G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013 ,  G11B2020/1227 ,  G11B2020/1228 ,  G11B2020/1268 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1298 ,  G11B2220/235 ,  G11B2220/2537 ,  G11B2220/2579

Abstract: An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer 1 is positioned outer than a start position of the data area of layer 0, the data lead-in area comprises a guard track zone wider than a test zone in the data lead-out area, the data lead-out area comprises a guard track zone wider than a test zone and a management zone in the data lead-in area, the middle area of layer 0 comprises a guard track zone wider than a test zone in the middle area of layer 1, and the middle area of layer 1 comprises a blank zone wider than a test zone in the middle area of layer 0.

公开(公告)号：US20070091777A1

公开(公告)日：2007-04-26

申请号：US11562074

申请日：2006-11-21

Applicant: Hideo Ando ,  Kazuo Watabe

Inventor： Hideo Ando ,  Kazuo Watabe

IPC: G11B7/24

CPC classification number: G11B27/24 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/00745 ,  G11B20/1217 ,  G11B20/18 ,  G11B27/22 ,  G11B2007/0013 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1239 ,  G11B2020/1277 ,  G11B2020/1292 ,  G11B2020/1298 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/235 ,  G11B2220/237 ,  G11B2220/2537 ,  G11B2220/2541 ,  G11B2220/2562 ,  G11B2220/2575 ,  G11B2220/2579

Abstract: This invention achieves high-density recording while preventing recording units from overlapping. Recording is done to form a gap between predetermined recording units. Since this gap is formed, even when a rotation driving mechanism of a medium suffers rotation nonuniformity, two neighboring recording units never overlap each other, and destruction of recording data can be prevented.

公开(公告)号：US20070086299A1

公开(公告)日：2007-04-19

申请号：US11563565

申请日：2006-11-27

Applicant: Kazuo WATABE ,  Hideo Ando ,  Sumitaka Maruyama ,  Yutaka Kashihara ,  Akihito Ogawa

Inventor： Kazuo WATABE ,  Hideo Ando ,  Sumitaka Maruyama ,  Yutaka Kashihara ,  Akihito Ogawa

IPC: G11B20/10 ,  G11B7/24

CPC classification number: G11B20/1217 ,  G11B7/0045 ,  G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013 ,  G11B2020/1227 ,  G11B2020/1228 ,  G11B2020/1268 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1298 ,  G11B2220/235 ,  G11B2220/2537 ,  G11B2220/2579

Abstract: An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer 1 is positioned outer than a start position of the data area of layer 0, the data lead-in area comprises a guard track zone wider than a test zone in the data lead-out area, the data lead-out area comprises a guard track zone wider than a test zone and a management zone in the data lead-in area, the middle area of layer 0 comprises a guard track zone wider than a test zone in the middle area of layer 1, and the middle area of layer 1 comprises a blank zone wider than a test zone in the middle area of layer 0.

公开(公告)号：US20070086278A1

公开(公告)日：2007-04-19

申请号：US11562057

申请日：2006-11-21

Applicant: Hideo Ando ,  Kazuo Watabe

Inventor： Hideo Ando ,  Kazuo Watabe

IPC: G11B7/085

CPC classification number: G11B27/24 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/00745 ,  G11B20/1217 ,  G11B20/18 ,  G11B27/22 ,  G11B2007/0013 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1239 ,  G11B2020/1277 ,  G11B2020/1292 ,  G11B2020/1298 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/235 ,  G11B2220/237 ,  G11B2220/2537 ,  G11B2220/2541 ,  G11B2220/2562 ,  G11B2220/2575 ,  G11B2220/2579

Abstract: This invention achieves high-density recording while preventing recording units from overlapping. Recording is done to form a gap between predetermined recording units. Since this gap is formed, even when a rotation driving mechanism of a medium suffers rotation nonuniformity, two neighboring recording units never overlap each other, and destruction of recording data can be prevented.

公开(公告)号：US07190663B2

公开(公告)日：2007-03-13

申请号：US10233671

申请日：2002-09-04

Applicant: Hideo Ando ,  Kazuo Watabe ,  Hiroharu Sato ,  Toshihiro Sugaya ,  Chosaku Noda

Inventor： Hideo Ando ,  Kazuo Watabe ,  Hiroharu Sato ,  Toshihiro Sugaya ,  Chosaku Noda

IPC: G11B7/00

CPC classification number: G11B7/00745 ,  G11B20/1217 ,  G11B20/1262 ,  G11B20/1833 ,  G11B27/24 ,  G11B27/3027 ,  G11B2020/10898 ,  G11B2020/1222 ,  G11B2020/1287 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562 ,  G11B2220/2575

Abstract: User data recording areas and intermediate areas are alternately arranged on a disk. The intermediate area records at least information for synchronization.

Abstract translation: 用户数据记录区域和中间区域交替地布置在盘上。 中间区域至少记录用于同步的信息。

公开(公告)号：US20070019532A1

公开(公告)日：2007-01-25

申请号：US11528579

申请日：2006-09-28

Applicant: Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

Inventor： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

IPC: G11B7/24

CPC classification number: G11B7/24056

Abstract: The refractive index of a light transmission layer of an optical disk is set within the range of 1.45 to 1.75, the numerical aperture of a lens emitting laser light which is incident onto the light transmission layer is set to 0.65, and the wavelength range of the laser light is set within the range of 395 to 415 nm. Further, in order that aberrations fall within the range of certain acceptable values, the thickness t of the light transmission layer is set within the range of f(n)−t1≦t≦f(n)+t2, employing constants t1, t2 determined based on an acceptable value of aberration and function f(n) of the refractive index n.

公开(公告)号：US20060187776A1

公开(公告)日：2006-08-24

申请号：US11345647

申请日：2006-01-31

Applicant: Hideaki Okano ,  Kazuo Watabe ,  Sumitaka Maruyama

Inventor： Hideaki Okano ,  Kazuo Watabe ,  Sumitaka Maruyama

IPC: G11B7/00

CPC classification number: G11B7/08511 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1381

Abstract: According to one embodiment, an optical pickup according to the present invention has a servo circuit in which, when Tp is a track pitch of an optical disk, NA is the numerical aperture of an objective lens, and Fp is a detection range of a focus error, a focus detection range defined in a range of 2Tp/(NA×Fp)

Abstract translation: 根据一个实施例，根据本发明的光学拾取器具有伺服电路，其中当Tp是光盘的轨道间距时，NA是物镜的数值孔径，Fp是焦点的检测范围 分配在2Tp /（NAxFp）<0.6的范围内定义的焦点检测范围。 以这种方式，可以减少由于轨道误差信号泄漏到聚焦误差信号中聚焦控制变得不稳定的情况。 因此，通过使用该光学拾取器可以获得不太可能发生故障的光盘记录和再现装置。

公开(公告)号：US07075877B2

公开(公告)日：2006-07-11

申请号：US10058084

申请日：2002-01-29

Applicant: Hideo Ando ,  Kazuo Watabe

Inventor： Hideo Ando ,  Kazuo Watabe

IPC: G11B20/10

CPC classification number: G11B27/24 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/00745 ,  G11B20/1217 ,  G11B20/18 ,  G11B27/22 ,  G11B2007/0013 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1239 ,  G11B2020/1277 ,  G11B2020/1292 ,  G11B2020/1298 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/235 ,  G11B2220/237 ,  G11B2220/2537 ,  G11B2220/2541 ,  G11B2220/2562 ,  G11B2220/2575 ,  G11B2220/2579

Abstract: This invention achieves high-density recording while preventing recording units from overlapping. Recording is done to form a gap between predetermined recording units. Since this gap is formed, even when a rotation driving mechanism of a medium suffers rotation nonuniformity, two neighboring recording units never overlap each other, and destruction of recording data can be prevented.

公开(公告)号：US20060002276A1

公开(公告)日：2006-01-05

申请号：US11168432

申请日：2005-06-29

Applicant: Sumitaka Maruyama ,  Akihito Ogawa ,  Katsuo Iwata ,  Kazuo Watabe

Inventor： Sumitaka Maruyama ,  Akihito Ogawa ,  Katsuo Iwata ,  Kazuo Watabe

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/08 ,  G11B7/0935 ,  G11B7/1372 ,  G11B7/1381 ,  G11B2007/0013

Abstract: An optical disc apparatus of the invention in its broader aspects, by locating, at a position displaced a predetermined distance from the focal point of a condenser lens, a light-receiving surface of a photodetector for receiving a laser beam reflected from first and second recording layers of an optical disc, is configured, when playing back a signal from a certain recording layer, to decrease the difference in a crosstalk caused by a light reflected from other recording layers.

Abstract translation: 本发明的光盘装置在其更广泛的方面，通过在从聚光透镜的焦点偏离预定距离的位置处定位用于接收从第一和第二记录反射的激光束的光电检测器的光接收表面 当从某个记录层播放信号时，配置有光盘的层，以减少由其他记录层反射的光引起的串扰差异。