公开(公告)号：US20060158995A1

公开(公告)日：2006-07-20

申请号：US11250416

申请日：2005-10-17

Applicant: Seong-Su Park ,  Young-Man Ahn ,  Jang-Hoon Yoo ,  Jung-Woo Hong

Inventor： Seong-Su Park ,  Young-Man Ahn ,  Jang-Hoon Yoo ,  Jung-Woo Hong

IPC: G11B7/00

CPC classification number: G11B7/094 ,  G11B7/0903 ,  G11B7/0943 ,  G11B7/131 ,  G11B2007/0006

Abstract: An optical pickup device and a focusing control method thereof are provided which can determine a DC offset caused by cross-talk of a focus error signal, eliminate the DC offset based on the determination, correct errors in a focus error signal of a main beam, which is caused by interference of side beams, so that optimal focus tracking can be performed. For this, the optical pickup device has at least one or more light sources, a diffraction optical element which diffracts light from the light source into a plurality of beams, an objective lens which condenses the plurality of beams diffracted by the diffraction optical element, a photo detector which detects the plurality of beams reflected from discs, and an auxiliary photo detector which detects the plurality of beams reflected from the discs to perform error correction of focus error detection signals obtained by the photo detector.

Abstract translation: 提供一种光拾取装置及其聚焦控制方法，其可以确定由聚焦误差信号的串扰引起的DC偏移，基于该确定消除DC偏移，校正主波束的聚焦误差信号中的误差， 这是由侧波束的干扰引起的，从而可以进行最佳的聚焦跟踪。 为此，光学拾取装置具有至少一个或多个光源，将来自光源的光衍射成多个光束的衍射光学元件，会聚由衍射光学元件衍射的多个光束的物镜， 光检测器，其检测从光盘反射的多个光束;以及辅助光检测器，其检测从盘反射的多个光束，以对由光检测器获得的聚焦误差检测信号进行纠错。

公开(公告)号：US07035191B2

公开(公告)日：2006-04-25

申请号：US09877248

申请日：2001-06-11

Applicant: Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

Inventor： Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

IPC: G11B7/00

CPC classification number: G11B7/127 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006

Abstract: An optical pickup compatible with recording media having different formats, the optical pickup includes a light device module having a first light beam source and a second light beam source to emit corresponding first and second light beams having different wavelengths, a hologram light coupler to separately guide the first and second light beams along the same optical path such that the first and second light beams go toward a corresponding one of the recording media, an optical path changing element to selectively alter the optical path of an incident light beam, and an objective lens disposed on an optical path between said optical path changing element the corresponding one of the recording media to focus the first and second light beam on the corresponding one of the recording media, and a photodetector to receive the first and second light beam incident from said optical path changing element.

公开(公告)号：US20060083145A1

公开(公告)日：2006-04-20

申请号：US11295594

申请日：2005-12-07

Applicant: Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

Inventor： Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

IPC: G11B7/00

CPC classification number: G11B7/127 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006

Abstract: An optical pickup compatible with recording media having different formats, the optical pickup includes a light device module having a first light beam source and a second light beam source to emit corresponding first and second light beams having different wavelengths, a hologram light coupler to separately guide the first and second light beams along the same optical path such that the first and second light beams go toward a corresponding one of the recording media, an optical path changing element to selectively alter the optical path of an incident light beam, and an objective lens disposed on an optical path between said optical path changing element the corresponding one of the recording media to focus the first and second light beam on the corresponding one of the recording media, and a photodetector to receive the first and second light beam incident from said optical path changing element.

公开(公告)号：USRE39025E1

公开(公告)日：2006-03-21

申请号：US09689757

申请日：2000-10-13

Applicant: Chul-woo Lee ,  Dong-ho Shin ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Yong-hoon Lee

Inventor： Chul-woo Lee ,  Dong-ho Shin ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Yong-hoon Lee

IPC: G02B9/00

CPC classification number: G11B7/1353 ,  G02B3/10 ,  G02B27/58 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in an intermediate region between near and far axes of an incident light beam, thus providing a simplified and inexpensive device for using discs of differing thickness in a single disc drive, by reducing the spherical aberration effect.

Abstract translation: 可以在光学拾取装置中用作物镜的透镜装置包括沿着光盘面向盘并具有预定有效直径的物镜，沿着光路设置的光控制装置，用于控制光 入射光束的近轴和远轴之间的中间区域，从而通过减小球面像差效应来提供在单个盘驱动器中使用不同厚度的盘的简化且便宜的装置。

公开(公告)号：US06882614B2

公开(公告)日：2005-04-19

申请号：US09789522

申请日：2001-02-22

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

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

CPC classification number: G11B7/1374 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical pickup having an objective lens, disposed opposite a disk, having a light passing region divided into central, intermediate and periphery regions corresponding to a near axis area, an intermediate axis area and a far axis area of incident light, where the curvature of the central and peripheral regions is optimized for a thin disk and that of the intermediate region is optimized for a thick disk, a light source irradiating light toward a disk through the objective lens; a photo detector for detecting light reflected from the disk, and a beam splitter, disposed between the objective lens and the light source, for transmitting light from the light source toward the objective lens and for diffracting light reflected from the disks toward the photo detector; and a processing unit to process an information signal to control the incident light generated by the light source, and to process the detected light from the photodetector. Therefore, the optical pickup device can be used for both compact disks (CDs) that are thick using light beam passing the near and intermediate regions of said objective lens, and digital video disks (DVDs) that are thin using light beam passing the near and far axis regions of said objective lens, and detect signals without picking up noise regardless of the thickness of the disk.

Abstract translation: 一种具有光学拾取装置的记录/再现装置，其具有很少的球面像差的光利用效率。 记录和/或再现装置包括具有与光盘相对设置的物镜的光学拾取器，具有被分成对应于近轴区域的中心，中间和周边区域的光通过区域，中间轴区域和远轴区域 入射光的中心区域和外围区域的曲率优化为薄盘，中间区域的曲率针对厚盘优化，光源通过物镜向盘照射光; 用于检测从光盘反射的光的光检测器和设置在物镜和光源之间的光束分离器，用于将光从光源向物镜透射，并将从光盘反射的光衍射到光检测器; 以及处理单元，处理信息信号以控制由光源产生的入射光，并处理来自光电检测器的检测光。 因此，光拾取装置可以用于使用通过所述物镜的近中和中间区域的光束而使用厚度的光盘（CD），以及使用经过近距离的光束的薄的数字视频盘（DVD） 所述物镜的远轴区域，无论盘的厚度如何，都可以检测信号而不拾取噪声。

公开(公告)号：US06556520B1

公开(公告)日：2003-04-29

申请号：US09629049

申请日：2000-07-31

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, a sum signal disk, a header area detector, a first synchronous signal level detector a first, a second synchronous signal level 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.

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，并且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，包括再现 信号发生器，和信号盘，标题区检测器，第一同步信号电平检测器，第一，第二同步信号电平检测器和用于计算由第一同步信号电平检测器检测的第一同步信号的幅度Ivfo1的平衡的平衡计算器 同步信号电平检测器和由第二同步信号电平检测的第二同步信号的幅度Ivfo3 探测器。

公开(公告)号：US06547398B2

公开(公告)日：2003-04-15

申请号：US09860820

申请日：2001-05-21

Applicant: Kun-ho Cho ,  Seung-tae Jung ,  Jang-hoon Yoo ,  Chul-woo Lee

Inventor： Kun-ho Cho ,  Seung-tae Jung ,  Jang-hoon Yoo ,  Chul-woo Lee

IPC: G03B2100

CPC classification number: G03B21/005 ,  H04N9/3117 ,  H04N13/305 ,  H04N13/324 ,  H04N13/337 ,  H04N13/363

Abstract: A projection-type image display apparatus having a structure adapted so that the efficiency of the use of light and resolving power thereof can be enhanced. The projection-type image display apparatus includes a light source; a color separation unit separating incident rays according to predetermined wavelengths, and directing the separated rays at different angles; a lens array dividing the rays separated by the color separation unit into predetermined pixels; a driving portion driving the lens array to change the proceeding paths of the color rays; a polarizing beam splitter changing a proceeding path of incident rays depending on a direction of polarization; a reflection-type display device producing a color image using the rays entering via the polarizing beam splitter, and reflecting the color image toward the polarizing beam splitter; and a projection lens unit magnifying and projecting an incident image onto a screen. In addition, the projection-type image display apparatus may comprise. Alternative designs include a transmission-type display device in place of the reflection-type display device and a deflector changing the proceeding paths of the individual color rays separated by the color separation unit instead of the driving portion.

Abstract translation: 一种投影型图像显示装置，其具有能够提高光的使用效率和分辨能力的结构。 投影型图像显示装置包括光源; 分离单元，根据预定波长分离入射光线，并以不同的角度引导分离的光线; 透镜阵列，将由分色单元分离的光线划分成预定的像素; 驱动所述透镜阵列以改变所述彩色光线的前进路径的驱动部; 偏振分束器根据偏振方向改变入射光线的行进路径; 反射型显示装置，使用通过偏振分束器进入的光线产生彩色图像，并将彩色图像反射向偏振分束器; 以及将投影图像放大并投影到屏幕上的投影透镜单元。 此外，投影型图像显示装置可以包括。 替代设计包括代替反射型显示装置的透射型显示装置和改变由分色单元分离的各个色光的行进路径而不是驱动部分的偏转器。

公开(公告)号：US06480222B1

公开(公告)日：2002-11-12

申请号：US08445509

申请日：1995-05-22

Applicant: Chul-woo Lee ,  Jang-hoon Yoo ,  Pyong-yong Seong

Inventor： Chul-woo Lee ,  Jang-hoon Yoo ,  Pyong-yong Seong

IPC: B41J2700

CPC classification number: B82Y10/00 ,  G11B7/122

Abstract: A semiconductor laser for generating a laser beam and an optical pickup for recording/reproducing information using the semiconductor laser as an optical source are provided. The semiconductor laser includes an aperture member on an emitting end thereof to perform high-density memory recording/reproducing through the reduction of an optical spot. The aperture has a hole whose diameter is smaller than the width of the active region of the semiconductor laser, to thereby restrictively emit the laser beam via the hole so that the optical spot formed on an optical disk is reduced. Thus, high-density memory recording/reproducing, which is useful for miniaturized information processors, can be realized.

Abstract translation: 提供了一种用于产生激光束的半导体激光器和用于使用半导体激光器作为光源来记录/再现信息的光学拾取器。 半导体激光器包括在其发射端上的孔径构件，以通过减少光点来执行高密度存储器记录/再现。 孔具有直径小于半导体激光器的有源区的宽度的孔，从而通过孔限制性地发射激光束，使得形成在光盘上的光点减小。 因此，可以实现对小型化信息处理器有用的高密度存储器记录/再现。

公开(公告)号：US06466529B1

公开(公告)日：2002-10-15

申请号：US09680463

申请日：2000-10-06

Applicant: Seok-jung Kim ,  Yong-hoon Lee ,  Tae-kyung Kim ,  Jang-hoon Yoo

Inventor： Seok-jung Kim ,  Yong-hoon Lee ,  Tae-kyung Kim ,  Jang-hoon Yoo

IPC: G11B700

CPC classification number: G11B7/0935 ,  G11B7/0933 ,  G11B7/0956

Abstract: An optical pickup assembly having an elastically supported tilt mechanism. The optical pickup assembly includes a bobbin at which an objective lens is mounted and an elastic support member which supports the bobbin in elastic motion with respect to a holder installed at a base. A focus coil and a tracking coil are installed at the bobbin and form a conducting path for driving the objective lens in a focusing direction and a tracking direction. Tilt coils are installed at one side of the bobbin and form a conductive path for driving tilt of the objective lens. A first magnet and a first yoke generate an electromagnetic force to driving the objective lens together with the current carrying focus coil and tracking coil. A second magnet and a second yoke generate an electromagnetic force to driving the objective lens together with the current carrying tilt coils. A position detecting sensor measures relative inclination of the objective lens with respect to a disk, and a balance member coupled to the bobbin to balance the weight of the tilt coils by applying weight corresponding to the weight of the tilt coils at positions symmetrically opposite to the positions of the tilt coils.

Abstract translation: 一种具有弹性支撑的倾斜机构的光学拾取器组件。 光拾取器组件包括安装物镜的筒管和相对于安装在基座上的保持器弹性运动地支撑筒管的弹性支撑构件。 聚焦线圈和跟踪线圈安装在线轴上并形成用于沿聚焦方向和跟踪方向驱动物镜的导电路径。 倾斜线圈安装在线轴的一侧，形成用于驱动物镜倾斜的导电路径。 第一磁体和第一磁轭一起产生电磁力以与载流聚焦线圈和跟踪线圈一起驱动物镜。 第二磁体和第二磁轭产生电磁力以与载流倾斜线圈一起驱动物镜。 位置检测传感器测量物镜相对于盘的相对倾斜度，以及平衡构件，其耦合到筒管，以通过将对应于倾斜线圈的重量的重量施加在倾斜线圈的重量上来平衡倾斜线圈的重量， 倾斜线圈的位置。

公开(公告)号：US06449229B1

公开(公告)日：2002-09-10

申请号：US09328375

申请日：1999-06-09

Applicant: Seok-Jung Kim ,  Byung-Ryul Ryoo ,  Yong-Ki Son ,  Pyong-Yong Seong ,  Yong-Jae Lee ,  Tae-Kyung Kim ,  Jang-Hoon Yoo

Inventor： Seok-Jung Kim ,  Byung-Ryul Ryoo ,  Yong-Ki Son ,  Pyong-Yong Seong ,  Yong-Jae Lee ,  Tae-Kyung Kim ,  Jang-Hoon Yoo

IPC: G11B700

CPC classification number: G11B7/0956 ,  G11B7/0933 ,  G11B7/0935

Abstract: An optical pickup assembly includes a base, a bobbin having an objective lens mounted thereon, the bobbin being installed at the base so as to be movable and having a pair of first side surfaces parallel to a radial direction of a disk and a pair of second side surfaces parallel to the tangential direction of a disk track, a focus coil wound around the bobbin for driving the objective lens in a focus direction, a track coil installed at the first side surfaces for driving the objective lens in a radial direction of the disk, a driving magnet installed at the base to face the first side surfaces, a tilt coil installed at the second side surfaces for driving the objective lens in response to the relative inclination between the objective lens and the disk, a first tilt magnet installed at the base such that one polarity thereof faces the tilt coil, a second tilt magnet installed at an upper portion of the first tilt magnet such that another polarity opposite to the one polarity thereof faces the tilt coil, an inclination detector for detecting the relative inclination between the objective lens and the disk, and a cover coupled to the base to protect the objective lens.

Abstract translation: 一种光学拾取器组件，包括基座，安装有物镜的线轴，所述线轴安装在所述基座上以便可移动，并且具有平行于盘的一半径的一对第一侧表面和一对第二 平行于盘轨道的切线方向的侧面，卷绕在筒管上的聚焦线圈，用于在聚焦方向上驱动物镜;轨道线圈，安装在第一侧面，用于沿盘的径向驱动物镜 安装在所述基座上以面对所述第一侧面的驱动磁体，安装在所述第二侧表面处以响应于所述物镜和所述盘之间的相对倾斜来驱动所述物镜的倾斜线圈，安装在所述物镜上的第一倾斜磁体 使得其一个极性面向倾斜线圈，第二倾斜磁体安装在第一倾斜磁体的上部，使得与其一个极性相反的另一极性f 倾斜线圈，用于检测物镜和盘之间的相对倾斜度的倾斜检测器，以及联接到基座以保护物镜的盖。