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    • 2. 发明授权
    • Optical pickup using laser light of different wavelengths to record and reproduce information to/from a disk
    • 使用不同波长的激光的光学拾取器从/向盘记录和再现信息
    • US06567366B2
    • 2003-05-20
    • US09144639
    • 1998-08-31
    • Tae-Kyung KimPyong-Yong SeongChul-Woo Lee
    • Tae-Kyung KimPyong-Yong SeongChul-Woo Lee
    • G11B700
    • G11B7/1356
    • An optical pickup records information on a recordable and reproducible disk and reads information therefrom. The optical pickup includes a laser light source for emitting first laser light in case of a reproduction mode for reproducing information from the disk and emitting second laser light in case of a recording mode for recording information on the disk. A collimating lens collimates the laser light emitted from the laser light source. A chromatic aberration corrector includes prisms of respectively different material properties, for beam-shaping and dispersing the laser light collimated by the collimating lens so that chromatic aberration of an optical spot formed on the disk is corrected in which the chromatic aberration is generated by a difference between the wavelengths of the first and second laser lights. The beam-shaped and dispersed first and second laser lights are focused on the disk by an objective lens.
    • 光学拾取器记录关于可记录和可重现的盘的信息并从中读取信息。 光拾取器包括用于在用于从盘再现信息的再现模式中发射第一激光的激光光源,并且在用于在盘上记录信息的记录模式的情况下发射第二激光。 准直透镜准直激光源发出的激光。 色差校正器包括分别具有不同材料特性的棱镜,用于对由准直透镜准直的激光进行光束整形和分散,从而校正在光盘上形成的光点的色差,其中通过差产生色差 在第一和第二激光的波长之间。 束状分散的第一和第二激光通过物镜聚焦在盘上。
    • 3. 发明授权
    • DVD-RAM disk reproduction apparatus for reducing errors during detection of identification data
    • 用于在识别数据检测期间减少误差的DVD-RAM盘再现装置
    • US06400658B1
    • 2002-06-04
    • US09275814
    • 1999-03-25
    • Chang-Jin YangPyong-Yong SeongSeong-Sin JooSoo-Yul JungJung-Eon SeoYong-Jae LeeJang-Hoon YooTae-Kyung Kim
    • Chang-Jin YangPyong-Yong SeongSeong-Sin JooSoo-Yul JungJung-Eon SeoYong-Jae LeeJang-Hoon YooTae-Kyung Kim
    • G11B17221
    • G11B27/24G11B7/005G11B7/00718G11B7/00745G11B19/04G11B20/18G11B27/3027G11B2220/216G11B2220/2575
    • A DVD-RAM disk reproduction apparatus for reducing an error during detection of ID data, which includes a first operational amplifier for obtaining a sum signal resulting from the addition of four picked-up signals picked up by divided-by-four photodiodes from a DVD-RAM disk having a header region and a recording region, second and third operational amplifiers for respectively obtaining two sum signals corresponding to the upper and lower regions of the header region resulting from the addition of the first and second picked-up signals and the third and fourth picked-up signals, respectively, a fourth operational amplifier for obtaining a difference signal between the two sum signals, a header region detector for detecting upper and lower header region signals corresponding to the upper header region and the lower header region based on the difference signal, and detecting a header region signal corresponding to a header region by logically summing the two detected signals, a first multiplexer for selecting one of the two sum signals obtained by the second and third operational amplifiers according to the upper header region signal, and a second multiplexer for selecting the sum signal selected by the first operational amplifier and the sum signal selected by the first multiplexer according to the header region signal, to thereby output the selected result to an equalizer. Thus, during detection of ID data in a header region, a difference signal between the picked-up four signals is not used, but a signal resulting from the addition of two signals among the picked-up signals according to the corresponding upper and lower regions of the header region is selectively used. Accordingly, ID data can be detected from a signal without deterioration, to thereby reduce an error and thus improve a detection margin.
    • 一种用于在ID数据检测期间减少误差的DVD-RAM盘再现装置,其包括第一运算放大器,用于获得由DVD的四分之一光电二极管拾取的四个拾取信号的相加而得到的和信号 -RAM盘,具有标题区域和记录区域,第二和第三运算放大器,用于分别获得对应于由所述第一和第二拾取信号的相加产生的标题区域的上部和下部区域的两个和信号,以及第三个 和第四拾取信号,分别用于获得两个和信号之间的差分信号的第四运算放大器,用于检测对应于上标题区域和下标题区域的上标题区域信号和下标头区域信号的标题区域检测器, 差分信号,并且通过对两个检测到的信号进行逻辑求和来检测与标题区域相对应的标题区域信号,第一个mul 层叠器,用于根据上标头区域信号选择由第二和第三运算放大器获得的两个和信号之一;以及第二多路复用器,用于选择由第一运算放大器选择的和信号和由第一多路复用器选择的和信号, 到标题区域信号,从而将所选择的结果输出到均衡器。 因此,在标题区域中的ID数据的检测期间,不使用拾取的四个信号之间的差分信号,而是根据相应的上部和下部区域在拾取信号之间添加两个信号而产生的信号 选择使用标题区域。 因此,可以从信号中检测ID数据而不劣化,从而减少误差,从而提高检测余量。
    • 4. 发明授权
    • Error signal detecting apparatus of optical pickup adopting hologram
grating
    • 采用全息光栅的光学拾取器的误差信号检测装置
    • US6167004A
    • 2000-12-26
    • US433296
    • 1999-11-03
    • Yong-jae LeeTae-Kyung KimPyong-yong SeongJang-hoon YooByung-ryul RyooYong-ki SonSeok-jung Kim
    • Yong-jae LeeTae-Kyung KimPyong-yong SeongJang-hoon YooByung-ryul RyooYong-ki SonSeok-jung Kim
    • G11B7/09G11B7/13G11B7/135G11B7/00
    • G11B7/131G11B7/094G11B7/0943G11B7/133G11B7/1353
    • An error signal detecting apparatus for an optical pickup employing a hologram grating, including a sensing lens for focusing light reflected from a recording medium, a hologram grating having first through fourth pattern regions arranged clockwise in a 2.times.2 matrix arrangement, for diffracting light incident from the sensing lens in different directions, wherein the first through fourth pattern regions a, b, c and d are formed such that a first focus of the +1st-order diffracted beams diffracted by the first and third pattern regions is relatively farther from the sensing lens than a second focus of the +1st-order diffracted beams diffracted by the second and fourth pattern regions, a photodetector disposed between the first and second focuses and having first through fourth light receiving units, for receiving the beams diffracted by the first through fourth pattern regions and independently photoelectrically converting the same, and a signal operation unit for detecting a focus error signal and/or a track error signal from detection signals of the light receiving parts. The error signal detecting apparatus can suppress generation of an offset of a focus error signal due to a change in the wavelength of a light source and an offsets of the focus error signal and track offset signal due to deviations of the photodetector.
    • 一种用于采用全息光栅的光学拾取器的误差信号检测装置,包括用于聚焦从记录介质反射的光的感测透镜,具有以2x2矩阵排列顺时针排列的第一至第四图案区域的全息图光栅,用于衍射从 感光透镜,其中第一至第四图案区域a,b,c和d被形成为使得由第一和第三图案区域衍射的+ 1级衍射光束的第一焦点相对较远离感测透镜 比由第二和第四图案区域衍射的+ 1级衍射光束的第二焦点,设置在第一和第二焦点之间并具有第一至第四光接收单元的光电检测器,用于接收由第一至第四图案衍射的光束 区域并独立地对其进行光电转换;以及信号操作单元,用于检测聚焦误差 信号和/或来自光接收部分的检测信号的轨道误差信号。 误差信号检测装置可以抑制由于光源的波长的变化引起的聚焦误差信号的偏移的产生以及由于光电检测器的偏差引起的聚焦误差信号和光道偏移信号的偏移。
    • 5. 发明授权
    • Optical pickup assembly with adjustable inclination
    • 具有可调倾斜度的光学拾取组件
    • US06449229B1
    • 2002-09-10
    • US09328375
    • 1999-06-09
    • Seok-Jung KimByung-Ryul RyooYong-Ki SonPyong-Yong SeongYong-Jae LeeTae-Kyung KimJang-Hoon Yoo
    • Seok-Jung KimByung-Ryul RyooYong-Ki SonPyong-Yong SeongYong-Jae LeeTae-Kyung KimJang-Hoon Yoo
    • G11B700
    • G11B7/0956G11B7/0933G11B7/0935
    • 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.
    • 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。
    • 6. 发明授权
    • Optical pickup using optically variable iris
    • 光学拾音器使用光学可变光圈
    • US06222801B1
    • 2001-04-24
    • US09266862
    • 1999-03-12
    • Jang-Hoon YooPyong-Yong SeongYong-Jae LeeTae-Kyung KimYong-Ki Son
    • Jang-Hoon YooPyong-Yong SeongYong-Jae LeeTae-Kyung KimYong-Ki Son
    • G11B712
    • G11B7/1398G11B7/127G11B7/131G11B7/1353G11B7/139G11B2007/0006
    • An optical pickup includes a variable iris having a numerical aperture is adjusted according to wavelength of light and can be compatibly used for discs having respectively different specifications. The optical pickup includes a plurality of laser sources respectively emitting light of different wavelengths, an objective lens for focusing the light emitted from the laser sources into an optical spot optimized to each information recording surface of the plurality of discs, at least one photo detector for detecting the light reflected from the information recording surfaces of the corresponding discs where the optical spot is focused and passed through the objective lens, an optical element for adjusting an optical path so that the light emitted from the laser sources is directed toward the objective lens and the light emitted from the objective lens is directed toward the at least one photo detector, and a variable iris coupled between the laser sources and the objective lens, selectively operating according to the wavelength. The optical pickup can be compatibly used for discs having respectively different specifications irrespective of the thicknesses of the discs. The variable iris selectively operates in the case that light of two or more wavelengths is used, to thereby provide an effect of accomplishing an optimal optical spot on the discs.
    • 光拾取器包括具有数值孔径的可变虹膜,其根据光的波长进行调整,并且可以兼容地用于分别具有不同规格的光盘。 光拾取器包括分别发射不同波长的光的多个激光源,用于将从激光源发射的光聚焦到优化到多个光盘的每个信息记录表面的光点中的物镜,至少一个光检测器,用于 检测从光点聚焦并通过物镜的相应盘的信息记录表面反射的光;光学元件,用于调节光路,使得从激光源发射的光朝向物镜;以及 从物镜发射的光指向至少一个光电检测器,并且耦合在激光源和物镜之间的可变光圈根据波长选择性地工作。 光学拾取器可以兼容地用于具有不同规格的盘,而与盘的厚度无关。 在使用两个或更多个波长的光的情况下,可变光圈选择性地操作,从而提供在光盘上实现最佳光点的效果。
    • 10. 发明授权
    • Apparatus and method for controlling inverter
    • 控制逆变器的装置及方法
    • US07881080B2
    • 2011-02-01
    • US12088542
    • 2006-12-28
    • Sung-Min ParkTae-Kyung Kim
    • Sung-Min ParkTae-Kyung Kim
    • H02M1/12H02M1/14
    • H02P23/03H02P2205/01
    • An apparatus and method for controlling an inverter capable of enhancing reliability of current measurement by ensuring an optimal time for which effective voltage vectors are applied to detect a three-phase current according to a phase current and sizes of the effective voltage vectors, the apparatus comprising a space voltage modulator that generates and outputs effective voltage vectors based upon a voltage command value, and a low modulation determiner that determines whether the effective voltage vectors are located within a low modulation region, and outputs a low modulation switching control signal or a normal modulation switching control signal according to the determination.
    • 一种用于控制逆变器的装置和方法,其能够通过确保施加有效电压矢量的最佳时间来根据有效电压矢量的相电流和大小检测三相电流来提高电流测量的可靠性,该装置包括 空间电压调制器,其基于电压指令值产生并输出有效电压矢量;以及低调制确定器,其确定有效电压矢量是否位于低调制区域内,并输出低调制切换控制信号或正常调制 切换控制信号根据确定。