公开(公告)号：US06721243B2

公开(公告)日：2004-04-13

申请号：US10378904

申请日：2003-03-05

Applicant: Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

Inventor： Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

IPC: G11B700

CPC classification number: G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

Abstract: A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting tilt error of the apparatus. The apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, each sector has a header for indicating an address, each header has a first header and a second header which are recorded to deviate from the center of the track in opposite directions, and the first header and the second header have address areas in which the addresses of sectors are recorded and synchronous signal areas in which synchronous signals for detecting the address signals recorded in the address area are recorded. As a result, it is possible for the recording/reproducing apparatus to stably control a servo therein and maintain an optimal recording/reproducing state since the apparatus for detecting the servo error correctly detects the servo error state of the disk.

Abstract translation: 一种检测伺服误差的方法，其装置，保持伺服误差信号量的盘，控制用于从盘记录数据和从盘再现数据的装置的伺服的方法，检测跟踪误差的方法 以及检测装置的倾斜误差的方法。 用于在盘中记录数据并从其再现数据的装置，其中记录区被划分为扇区，每个扇区具有用于指示地址的标题，每个标题具有被记录为偏离中心的第一标题和第二标题 并且第一标题和第二标题具有其中记录了扇区的地址的地址区域和记录了用于检测记录在地址区域中的地址信号的同步信号的同步信号区域。 结果，由于用于检测伺服误差的装置正确地检测到盘的伺服错误状态，所以记录/再现装置可以稳定地控制其中的伺服并保持最佳的记录/再现状态。

公开(公告)号：US06611482B2

公开(公告)日：2003-08-26

申请号：US09812714

申请日：2001-03-22

Applicant: Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh

Inventor： Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh

IPC: G11B700

CPC classification number: G11B7/131 ,  G11B7/00718 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0956

Abstract: An error signal detecting apparatus for an optical recording/reproducing apparatus, the error signal detecting apparatus including a photodetector to receive light reflected and diffracted by a recording medium, and a signal processor to detect an error signal by calculating a detection signal of the photodetector. The photodetector includes a plurality of light receiving areas to independently receive light of a light area in which the profile of the light changes to the opposite profile according to the tangential tilt of the recording medium. The signal processor detects a tangential tilt error signal from detection signals of the light receiving areas. Thus, a signal output from the error signal detecting apparatus does not change when a shift is generated in the objective lens or the distance between the objective lens and the disc is deviated from the on-focus position. Also, a change in the profile of the light beam according to a relative tangential tilt with respect to the objective lens of a recording medium in land/groove format can be properly detected so that an accurate tangential tilt error signal can be detected.

Abstract translation: 一种用于光学记录/再现装置的误差信号检测装置，所述误差信号检测装置包括用于接收由记录介质反射和衍射的光的光电检测器，以及通过计算所述光电检测器的检测信号来检测误差信号的信号处理器。 光电检测器包括多个光接收区域，以独立地接收光区域的光，其中光的轮廓根据记录介质的切线倾斜而改变到相反的轮廓。 信号处理器从光接收区域的检测信号检测切向倾斜误差信号。 因此，当在物镜中产生偏移或物镜与盘之间的距离偏离对焦位置时，从误差信号检测装置输出的信号不改变。 此外，可以适当地检测根据相对于陆地/凹槽格式的记录介质的物镜的相对切向倾斜的光束轮廓的变化，从而可以检测出精确的切向倾斜误差信号。

公开(公告)号：US06590853B1

公开(公告)日：2003-07-08

申请号：US09281230

申请日：1999-03-30

Applicant: Yong-hoon Lee ,  Chul-woo Lee ,  Chong-sam Chung ,  Kun-ho Cho

Inventor： Yong-hoon Lee ,  Chul-woo Lee ,  Chong-sam Chung ,  Kun-ho Cho

IPC: G11B7085

CPC classification number: G11B7/122 ,  G11B7/08576 ,  G11B7/08594 ,  G11B7/14 ,  G11B7/24038

Abstract: A swing arm driving type optical recording/reproducing apparatus includes a base, at least one optical disk rotatably installed on the base, both sides of which are information recording surfaces and a plurality of optical pickups which are equal in number to the information recording surfaces so as to form light spots on the respective information recording surfaces of the optical disk. Each optical pickup includes a light source for irradiating light. The apparatus also includes optical path changing units respectively arranged on optical paths between the light sources and respective ones of the information recording surfaces for changing the traveling paths of the lights and objective lenses arranged between the optical path changing units and the respective information recording surfaces for condensing incident light on the respective information recording surfaces. Photodetectors receive the lights reflected from the respective information recording surfaces and incident via the respective objective lenses and the optical path changing units. A swing member includes a mount on which the light sources, the optical path changing units and the photodetectors are installed. A plurality of swing arms extend from the mount. A suspension has one end which is installed on a surface of each swing arm and is adjacent to the respective information recording surface for elastically biasing the other end. A slider is installed at the other end of the suspension, which contacts the respective information recording surface by the elastic bias of the suspension and into which the respective objective lens is loaded. A supporting unit is interposed between the base and the mount for supporting the swing member to be reciprocally rotatable centering around one hinge point on the base and a magnetic driver for reciprocally rotating the swing member.

Abstract translation: 摇臂驱动型光学记录/再现装置包括基座，至少一个可旋转地安装在基座上的光盘，其两侧是信息记录表面和与信息记录表面相等的多个光学拾取器 以便在光盘的相应信息记录表面上形成光斑。 每个光学拾取器包括用于照射光的光源。 该装置还包括光路改变单元，其分别设置在光源和信息记录表面之间的光路上，用于改变布置在光路改变单元和各个信息记录表面之间的光和物镜的行进路径， 将入射光聚光在相应的信息记录表面上。 光检测器接收从相应的信息记录表面反射并经由各个物镜和光路改变单元入射的光。 摆动构件包括其上安装有光源，光路改变单元和光电检测器的安装件。 多个摆臂从支座延伸。 悬架的一端安装在每个摆臂的表面上，并且与相应的信息记录表面相邻以弹性地偏压另一端。 滑块安装在悬架的另一端，其通过悬架的弹性偏置与相应的信息记录表面接触，并且相应的物镜被加载到该悬架中。 支撑单元插入在基座和支架之间，用于支撑摆动构件以使基座上的一个铰链点为中心往复旋转，以及用于使摆动构件往复旋转的磁性驱动器。

公开(公告)号：US06469979B1

公开(公告)日：2002-10-22

申请号：US09385415

申请日：1999-08-30

Applicant: Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

Inventor： Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

IPC: G11B700

CPC classification number: G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

Abstract: A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting tilt error of the apparatus. The apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, each sector has a header for indicating an address, each header has a first header and a second header which are recorded to deviate from the center of the track in opposite directions, and the first header and the second header have address areas in which the addresses of sectors are recorded and synchronous signal areas in which synchronous signals for detecting the address signals recorded in the address area are recorded, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector for generating a header area signal including a header area from the reproducing signal received from the reproducing signal generator, a first synchronous signal level detector for receiving the output of the reproducing signal generator and detecting a magnitude Ivfo1 of a first synchronous signal in the first header by being synchronized with the header area signal received from the header area detector, a second synchronous signal level detector for receiving the output of the reproducing signal generator and detecting a magnitude Ivfo3 of a second synchronous signal in the second header by being synchronized with the header area signal received from the header area detector, and a balance calculator for calculating the balance of the magnitude Ivfo1 of the first synchronous signal detected by the first synchronous signal level detector and the magnitude Ivfo3 of the second synchronous signal detected by the second synchronous signal level detector. As a result, it is possible for the recording/reproducing apparatus to stably control a servo therein and maintain an optimal recording/reproducing state since the apparatus for detecting the servo error correctly detects the servo error state of the disk.

公开(公告)号：US06275461B1

公开(公告)日：2001-08-14

申请号：US09538976

申请日：2000-03-31

Applicant: Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

Inventor： Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

IPC: G11B712

CPC classification number: G11B7/127 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B2007/0006

Abstract: A recording/reproducing apparatus includes an optical pickup device having an optical phase plate which is compatible with optical recording mediums having different thicknesses, and an optical signal processing device processes information read from the optical recording mediums and processes information to be recorded thereon using the optical pickup device.

Abstract translation: 记录/再现装置包括具有光学相位差的光学拾取装置，其与具有不同厚度的光学记录介质兼容，并且光学信号处理装置处理从光学记录介质读取的信息并使用光学处理信息记录在其上 拾取装置。

公开(公告)号：US6091691A

公开(公告)日：2000-07-18

申请号：US23046

申请日：1998-02-13

Applicant: Jang-hoon Yoo ,  Chong-sam Chung ,  Chul-woo Lee ,  Kun-ho Cho

Inventor： Jang-hoon Yoo ,  Chong-sam Chung ,  Chul-woo Lee ,  Kun-ho Cho

IPC: G11B7/00 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

CPC classification number: G11B7/1353 ,  G11B7/126 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: An optical pickup compatible with a plurality of optical recording media each using light of a different wavelength. The optical pickup includes at least one light source, an objective lens, and a light detector. The objective lens has an inner area, an annular lens area and an outer area such that the annular lens area divides the inner area from the outer area and has a ring shape centered at a vertex. The inner area, the annular lens area and the outer area have aspherical surface shapes to focus light transmitted through the inner area and the outer area into a single light spot by which information can be read from the information recording surface of a relatively thin first optical recording medium and scatter light transmitted through the annular lens area located between the inner area and the outer area so that information cannot be read from the information recording surface of the first optical recording medium, during reproduction of the first optical recording medium. The inner area and the annular lens area transmit light into a single light spot by which information can be read from the information recording surface of a relatively thick second optical recording medium and scatters light transmitted through the outer lens area so that information cannot be read from the information recording surface of the second optical recording medium, during reproduction of the second optical recording medium.

Abstract translation: 一种与多个使用不同波长的光的多个光学记录介质兼容的光学拾取器。 光拾取器包括至少一个光源，具有将从光源发射的光聚焦到多个光学记录介质之一的信息记录表面上的最佳光点中的功能的物镜，以及光检测器 在从形成有光斑的光记录介质的信息记录面反射后，检测透过物镜的光。 物镜具有内部区域，环形透镜区域和外部区域，使得环形透镜区域将内部区域与外部区域分开并且具有以顶点为中心的环形。 内部区域，环形透镜区域和外部区域具有非球面形状，以将透过内部区域和外部区域的光聚焦成单个光点，通过该单个光点可以从相对较薄的第一个信息记录表面读取信息 光学记录介质和透射通过位于内部区域和外部区域之间的环形透镜区域的散射光，使得在再现第一光学记录介质期间不能从第一光学记录介质的信息记录表面读取信息。 内部区域和环形透镜区域将光透射到单个光点中，通过该单个光点可以从相对较厚的第二光学记录介质的信息记录表面读取信息，并散射透过外部透镜区域的光，从而不能从 在第二光学记录介质的再现期间，第二光学记录介质的信息记录表面。

公开(公告)号：US5933401A

公开(公告)日：1999-08-03

申请号：US869754

申请日：1997-06-05

Applicant: Chul-woo Lee ,  Dong-ho Shin ,  Chong-sam Chung ,  Pyeong-yong Seong ,  Kun-ho Cho ,  Hyun-seob Choi ,  Yong-hoon Lee ,  Tae-kyoung Kim ,  No-kyong Park

Inventor： Chul-woo Lee ,  Dong-ho Shin ,  Chong-sam Chung ,  Pyeong-yong Seong ,  Kun-ho Cho ,  Hyun-seob Choi ,  Yong-hoon Lee ,  Tae-kyoung Kim ,  No-kyong Park

IPC: G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135

CPC classification number: G11B7/1356 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1395 ,  G11B2007/0006

Abstract: An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.

Abstract translation: 能够兼容地采用放置在光学播放器中的不同格式的光盘的光学拾取器包括：用于发射具有预定波长的光的第一光源;用于发射波长与第一光发射光的波长不同的光的第二光源; 光源，用于将从相应的第一和第二光源发射的光聚焦在放置在光学播放器中的记录介质上的物镜;设置在第一和第二光源与物镜之间的光路上的光路改变单元， 改变入射光的行进路径，第一光学检测器，用于接收从第一光源发射的光，并经由记录介质和光路改变单元入射;以及第二光学检测器，用于接收从第二光源发射的光;以及 经由记录介质和光路改变单元入射。

公开(公告)号：US5802037A

公开(公告)日：1998-09-01

申请号：US708988

申请日：1996-09-06

Applicant: Chul-woo Lee ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Jang-hoon Yoo ,  Soo-yeul Jung

Inventor： Chul-woo Lee ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Jang-hoon Yoo ,  Soo-yeul Jung

IPC: G11B7/08 ,  G11B7/00 ,  G11B7/09 ,  G11B7/13

CPC classification number: G11B7/131 ,  G11B7/0909 ,  G11B7/133 ,  G11B2007/0006

Abstract: An optical pickup device which is capable of reproducing and recording information from/onto at least two kinds of discs having different thicknesses includes a light source, an objective lens provided along the light path from the light source facing the plane of a disc and having a predetermined effective diameter, a beam splitter provided between the objective lens and the light source, and a photodetector for detecting the beam split from the light splitter and reflected from the disc, wherein the photodetector has a first detection region and a second detection region provided in the peripheral portion of the first detection region. The optical pickup device is simplified and the manufacturing cost therefor is low. Also, by reducing the spherical aberration effect for the light, discs having different thicknesses can be used for a single disc drive.

Abstract translation: 能够从具有不同厚度的至少两种光盘再现和记录信息的光学拾取装置包括：光源，沿着从光源面向光盘面的光路设置的物镜，具有 设置在所述物镜和所述光源之间的分束器，以及用于检测从所述分光器分离并从所述光盘反射的光束的光电检测器，其中所述光电检测器具有第一检测区域和设置在所述光源中的第二检测区域 第一检测区域的周边部分。 光拾取装置简化，制造成本低。 此外，通过减小光的球面像差效应，可以将具有不同厚度的盘用于单个盘驱动器。

公开(公告)号：US5629514A

公开(公告)日：1997-05-13

申请号：US458165

申请日：1995-06-02

Applicant: Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Kyung-hwa Rim

Inventor： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Kyung-hwa Rim

IPC: G11B7/09 ,  G11B7/135 ,  G01J1/20 ,  G11B7/00

CPC classification number: G11B7/1356 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/0943 ,  G11B2007/0919

Abstract: A focus error detector for detecting a signal representing a degree of a focus error of an objective lens with respect to an optical disk in an optical pickup, in order to eliminate errors due to an optical axis shift or tilt of the reflected light reflected from the optical disk, includes a diffraction device for diffracting and splitting the reflected light reflected. The focus error detector a critical angle reflector having critical angle reflecting planes for reflecting the two diffracted light rays at two critical angles, two bi-segmented photo-detectors for receiving the two diffracted light rays reflected from the critical angle reflector, respectively, and detecting signals depending on the received light amount, and a circuit for differentiating and summing each signal of the two bi-segmented photo-detectors so as to offset the light amount difference due to the tilt or shift of the reflected light and outputting a desired signal. Therefore, only an original focus error signal is output, irrespective of an optical shift or tilt of the reflected light, so that malfunction of the optical pickup is prevented and clean recording and reproduction is enabled.

Abstract translation: 一种聚焦误差检测器，用于检测表示物镜相对于光学拾取器中的光盘的聚焦误差的程度的信号，以便消除由于光学偏移反射的反射光的光轴偏移或倾斜引起的误差 光盘包括用于衍射和分裂反射的反射光的衍射装置。 聚焦误差检测器，具有用于以两个临界角度反射两个衍射光线的临界角反射面的临界角反射镜，分别用于接收从临界角反射器反射的两个衍射光线的两个双段光电检测器， 信号，以及用于对两个双分段光电检测器的每个信号进行微分和求和以便偏移由于反射光的倾斜或偏移引起的光量差异并输出所需信号的电路。 因此，不管反射光的光学偏移或倾斜如何，仅输出原始聚焦误差信号，从而防止光学拾取器的故障，并且能够进行清洁的记录和再现。

公开(公告)号：US5587976A

公开(公告)日：1996-12-24

申请号：US555967

申请日：1995-11-13

Applicant: Jang-hoon Yoo ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Chul-woo Lee

Inventor： Jang-hoon Yoo ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Chul-woo Lee

IPC: G11B11/10 ,  G11B5/00 ,  G11B5/012 ,  G11B5/35 ,  G11B5/596 ,  G11B7/12 ,  G11B11/105 ,  G11B7/00

CPC classification number: G11B11/10543 ,  G11B5/00 ,  G11B5/012 ,  G11B5/35 ,  G11B5/596

Abstract: An optical pickup for an optical magnetic disc includes a light source, a grating for diffracting the light into a main light beam and auxiliary light beams, a plurality of magnetic dipole tips arranged above the optical magnetic disc so as to interact with the magnetic signal stored in the optical magnetic disc. Also, a plurality of mirror members each attached to the rear of each magnetic dipole tips are for reflecting the light incident on the mirror member, and a photodetector for detecting track errors and the stored information by receiving the light reflected from the mirror members are provided, thereby detecting the error signal and reproducing information by the interaction with the magnetic dipoles of the disc so that the recording density can be increased without increasing the conventional land and groove areas in the disc.

Abstract translation: 一种用于光磁盘的光拾取器包括光源，用于将光衍射成主光束的光栅和辅助光束，布置在光磁盘上方的多个磁偶极子尖端，以便与存储的磁信号相互作用 在光磁盘中。 此外，各个安装在每个磁偶极头的后面的多个镜构件用于反射入射在镜构件上的光，并且设置用于检测轨道错误的光电检测器和通过接收从镜构件反射的光的存储信息 从而通过与盘的磁偶极子的相互作用来检测误差信号和再现信息，从而可以增加记录密度，而不增加盘中常规的平台和凹槽区域。