Patents by Inventor Byung-ryul Ryoo
Byung-ryul Ryoo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7663984Abstract: An optical pickup actuator which includes a base, a blade having an objective lens mounted thereon, a plurality of suspensions supporting the blade to be movable with respect to the base and forming an electroconductive path, and a magnetic circuit driving the blade according to a driving signal applied through the respective suspensions. The magnetic circuit includes a magnet fixed to the base, and a fine pattern coil installed on the blade at a position facing the magnet and having a track pattern coil, a focus pattern coil, and a tilt pattern coil independently driven by current applied through the suspensions and providing driving forces in a track direction, a focus direction, and a tilt direction of the blade.Type: GrantFiled: January 25, 2007Date of Patent: February 16, 2010Assignee: Toshiba Samsung Storage Technology Korea CorporationInventors: Sang-yol Yoon, Dae-jong Jang, Young-bin Lee, Yong-jae Lee, Byung-ryul Ryoo, Young-won Lee
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Patent number: 7453656Abstract: An optical recording and/or reproducing apparatus with an optical pickup actuator having high thrust. The optical pickup actuator may include a lens holder which holds an objective lens and is movably supported by a supporting unit, and a magnetic driving unit which drives the lens holder in a focusing direction, a tracking direction, and/or a tilting direction. The magnetic driving unit includes a surface-triple pole magnet portion and a coil portion. The surface-triple pole magnet portion has a plurality of polarized, i.e., differently magnetized, areas formed by facing sides of two magnets among three magnets. The coil portion includes tracking coils and tilt coils disposed to interact with the polarized areas of the surface-triple pole magnet portion and a focusing coil disposed to interact with a non-polarized area of the surface-triple pole magnet portion.Type: GrantFiled: March 22, 2006Date of Patent: November 18, 2008Assignee: Toshiba Samsung Storage Technology Korea CorporationInventors: Dae-jong Jang, Byung-youn Song, Young-bin Lee, Byung-ryul Ryoo, Pyong-yong Seong, Young-won Lee
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Patent number: 7355953Abstract: An optical pickup includes a light source which emits light, a grating which separates a portion of the light emitted from the light source, a reflecting member which reflects another portion of the light emitted from the light source, a monitoring photodetector disposed on a traveling path of the light reflected from the reflecting member and which measures the reflected light, an optical path changer which changes an optical path of the light separated by the grating, an objective lens light which condenses the light the optical path of which is changed onto a disc, and a signal detecting photodetector which receives the light reflected from the disc.Type: GrantFiled: October 17, 2003Date of Patent: April 8, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Ui-yol Kim, Byung-ryul Ryoo, Pyong-yong Seong, Myoung-cheol Cho, Kyung-ui Park
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Patent number: 7352662Abstract: A molded coil device includes a coil comprised of a plurality of turns of a conductive material through a plurality of planes and an integral body comprised of an insulating and nonmagnetic material burying the coil. The coil is first formed and thereafter is sintered/pressed with the insulating and nonmagnetic material to form the integral body. The molded coil device is advantageously applied within an optical pickup actuator of an optical disc drive.Type: GrantFiled: May 11, 2004Date of Patent: April 1, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Won-Ik Cho, Byung-Ryul Ryoo, Jong-Ha Jun, Dae-Jong Jang, Hyung-Joo Kang, Byung-Youn Song
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Patent number: 7266055Abstract: An optical pickup actuator and optical disc drive using the same. The optical pickup actuator includes a blade holding an objective lens and supported on a base by a plurality of suspension wires so that it is elastically movable, a magnetic element positioned on the base, and a coil positioned horizontally on the blade to generate electromagnetic force in a focusing direction and/or a tilting direction through interaction with the magnetic element. The coil is divided into a plurality of subcoils separated vertically from one another.Type: GrantFiled: May 20, 2004Date of Patent: September 4, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Won-ik Cho, Byung-ryul Ryoo, Young-pil Park, No-cheol Park
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Publication number: 20070201323Abstract: An optical pickup actuator which includes a base, a blade having an objective lens mounted thereon, a plurality of suspensions supporting the blade to be movable with respect to the base and forming an electroconductive path, and a magnetic circuit driving the blade according to a driving signal applied through the respective suspensions. The magnetic circuit includes a magnet fixed to the base, and a fine pattern coil installed on the blade at a position facing the magnet and having a track pattern coil, a focus pattern coil, and a tilt pattern coil independently driven by current applied through the suspensions and providing driving forces in a track direction, a focus direction, and a tilt direction of the blade.Type: ApplicationFiled: January 25, 2007Publication date: August 30, 2007Applicant: TOSHIBA SAMSUNG STORAGE TECHNOLOGY KOREA CORPORATIONInventors: Sang-yol Yoon, Dae-jong Jang, Young-bin Lee, Yong-jae Lee, Byung-ryul Ryoo, Young-won Lee
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Publication number: 20060218569Abstract: An optical recording and/or reproducing apparatus with an optical pickup actuator having high thrust. The optical pickup actuator may include a lens holder which holds an objective lens and is movably supported by a supporting unit, and a magnetic driving unit which drives the lens holder in a focusing direction, a tracking direction, and/or a tilting direction. The magnetic driving unit includes a surface-triple pole magnet portion and a coil portion. The surface-triple pole magnet portion has a plurality of polarized, i.e., differently magnetized, areas formed by facing sides of two magnets among three magnets. The coil portion includes tracking coils and tilt coils disposed to interact with the polarized areas of the surface-triple pole magnet portion and a focusing coil disposed to interact with a non-polarized area of the surface-triple pole magnet portion.Type: ApplicationFiled: March 22, 2006Publication date: September 28, 2006Applicant: TOSHIBA SAMSUNG STORAGE TECHNOLOGY KOREA CORPORATIONInventors: Dae-jong Jang, Byung-youn Song, Young-bin Lee, Byung-ryul Ryoo, Pyong-yong Seong, Young-won Lee
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Publication number: 20040252596Abstract: A molded coil device includes a coil comprised of a plurality of turns of a conductive material through a plurality of planes and an integral body comprised of an insulating and nonmagnetic material burying the coil. The coil is first formed and thereafter is sintered/pressed with the insulating and nonmagnetic material to form the integral body. The molded coil device is advantageously applied within an optical pickup actuator of an optical disc drive.Type: ApplicationFiled: May 11, 2004Publication date: December 16, 2004Inventors: Won-Ik Cho, Byung-Ryul Ryoo, Jong-Ha Jun, Dae-Jong Jang, Hyung-Joo Kang, Byung-Youn Song
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Publication number: 20040240335Abstract: An optical pickup actuator and optical disc drive using the same. The optical pickup actuator includes a blade holding an objective lens and supported on a base by a plurality of suspension wires so that it is elastically movable, a magnetic element positioned on the base, and a coil positioned horizontally on the blade to generate electromagnetic force in a focusing direction and/or a tilting direction through interaction with the magnetic element. The coil is divided into a plurality of subcoils separated vertically from one another.Type: ApplicationFiled: May 20, 2004Publication date: December 2, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Won-ik Cho, Byung-ryul Ryoo, Young-pil Park, No-cheol Park
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Publication number: 20040179456Abstract: An optical pickup includes a light source which emits light, a grating which separates a portion of the light emitted from the light source, a reflecting member which reflects another portion of the light emitted from the light source, a monitoring photodetector disposed on a traveling path of the light reflected from the reflecting member and which measures the reflected light, an optical path changer which changes an optical path of the light separated by the grating, an objective lens light which condenses the light the optical path of which is changed onto a disc, and a signal detecting photodetector which receives the light reflected from the disc.Type: ApplicationFiled: October 17, 2003Publication date: September 16, 2004Applicant: SAMSUNG Electronics Co., Ltd.Inventors: Ui-yol Kim, Byung-ryul Ryoo, Pyong-yong Seong, Myoung-cheol Cho, Kyung-ui Park
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Publication number: 20040170108Abstract: An optical pickup apparatus in which an arrangement and adjustment of optical elements is easy. The optical pickup apparatus includes a light source to emit laser light; a beam splitter to change the travel path of incident light; an objective lens to condense light passed through the beam splitter to form a light spot on an optical recording medium; and a photodetector to receive light reflected from the optical recording medium and then passed through the beam splitter to detect an information signal and an error signal. The optical pickup apparatus further includes a grating for diffraction-transmitting incident light; a wavelength plate to change polarization characteristic of incident light; and an optical output compensating lens to compensate output of light incident from the light source. The grating, the wavelength plate, and the optical output compensating lens are disposed on an optical path between the light source and the beam splitter.Type: ApplicationFiled: October 20, 2003Publication date: September 2, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Byung-Ryul Ryoo, Dong-Ryeol Lee
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Publication number: 20040120231Abstract: An optical pickup actuator and an optical pickup using the same, wherein the optical pickup actuator has: a lens holder, on which an objective lens is mounted; and a tilt photodetector, which is installed in the lens holder and receives a portion of light used to record and/or to reproduce information on and/or from a recording medium according to a relative tilt between the objective lens and the recording medium. The optical pickup actuator moves the objective lens in a tracking direction, a focusing direction, and a tilting direction. The optical pickup actuator can detect both tilt of the recording medium and tilt of the objective lens using the tilt photodetector, so the optical pickup can be applied to an optical recording and/or reproducing apparatus of high-density and/or high-speed.Type: ApplicationFiled: September 10, 2003Publication date: June 24, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Kyung-Ui Park, Byung-Ryul Ryoo, Pyong-Yong Seong, Myoung-Cheol Cho, Ui-Yol Kim
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Patent number: 6686697Abstract: A circuit protects a light element and prevents a breakdown of a laser diode (LD) when electric static discharge (ESD) occurs. The circuit protects the light element in a drive to control an operation of the light element, which radiates light onto a disc. Here, the drive includes a switch between an active node of the light element and a predetermined potential so that the switch is short-circuited in a normal state, but is open when the drive operates. The light element is protected from static electricity or a surge voltage in a manufacturing process thereof or under a user environment. As a result, the probability that the light element is broken down is remarkably reduced.Type: GrantFiled: October 28, 2002Date of Patent: February 3, 2004Assignee: Samsung Electronics Co., Ltd.Inventors: Myoung-cheol Cho, Byung-ryul Ryoo, Kyung-ui Park, Ui-yol Kim, Pyong yong Seong
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Patent number: 6636464Abstract: An optical pickup device employing a signal detection unit including a hologram element having a plurality of pattern regions for diffracting and/or focusing light reflected and incident from a recording medium, a photodetector having a plurality of light receiving regions for receiving and photoelectrically converting the light diffracted by the hologram element and a signal operation unit for generating a focus error signal and/or a track error signal from a signal detected from the photodetector. The optical pickup device can implement a stable servo operation even at deviations of the photodetector, a change in the wavelength of light emitted from the light source, and/or shift of focusing means such as an objective lens, and can record and/or reproduce high-density information on/from the recording medium.Type: GrantFiled: June 6, 2000Date of Patent: October 21, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-jae Lee, Pyong-yong Seong, Jang-hoon Yoo, Byung-ryul Ryoo, Yong-ki Son
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Patent number: 6587481Abstract: A light emitting module packaging two light sources emitting two light beams of different wavelengths, and a compatible optical pickup device adopting the module are provided. The light emitting module includes a base, first and second light sources installed on the base, for emitting laser beams in different wavelength regions, a beam splitter and a monitoring photodetector for monitoring the optical outputs of the first and second light sources by receiving the beams emitted from the first and second light sources and split from the beam splitter in one direction.Type: GrantFiled: April 19, 2000Date of Patent: July 1, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Pyong-yong Seong, Yong-jae Lee, Byung-ryul Ryoo, Yong-ki Son
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Patent number: 6584047Abstract: A pickup actuator capable of significantly reducing rolling of the area, including: a pickup base, a lens holder having an objective lens mounted thereon, and lens holder driving means for driving the lens holder in directions for focusing and tracking on the pickup base. The lens holder driving means includes at least one magnet, a yoke for concentrating the magnetic flux of the magnet in the direction of the magnetic flux, and a driving coil having a focusing coil and a pair of tracking coils positioned between the magnet and the yoke. The respective widths of the magnet and the yoke are set at a rate of 1:0.8-1.2. Accordingly, the uniform magnetic flux area of the magnetic flux can be widely distributed in the width's direction of the yoke.Type: GrantFiled: November 18, 1999Date of Patent: June 24, 2003Assignee: Samsung Electronics Co., LTDInventors: Seok-jung Kim, Byung-ryul Ryoo, Yong-ki Son, Yong-hoon Lee
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Publication number: 20030107324Abstract: A circuit protects a light element and prevents a breakdown of a laser diode (LD) when electric static discharge (ESD) occurs. The circuit protects the light element in a drive to control an operation of the light element, which radiates light onto a disc. Here, the drive includes a switch between an active node of the light element and a predetermined potential so that the switch is short-circuited in a normal state, but is open when the drive operates. The light element is protected from static electricity or a surge voltage in a manufacturing process thereof or under a user environment. As a result, the probability that the light element is broken down is remarkably reduced.Type: ApplicationFiled: October 28, 2002Publication date: June 12, 2003Applicant: Samsung Electronics Co., Ltd.Inventors: Myoung-Cheol Cho, Byung-Ryul Ryoo, Kyung-Ui Park, Ui-Yol Kim, Pyong Yong Seong
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Patent number: 6507554Abstract: An actuator for an optical pick-up and a method of rolling a driving coil using the same. The actuator for the optical pick-up includes a bobbin for holding an object lens, a suspension for connecting the bobbin to a holder, and a magnetic driver. The magnetic driver includes a pair of permanent magnets respectively positioned near opposite sides of the bobbin, a plurality of tracking coils with pairs of the tracking coils rolled on opposite side surfaces of the bobbin, and a focus coil rolled around the bobbin and the plurality of tracking coils. The plurality of tracking coils and focus coil receive current to move the optical pickup through interaction with the permanent magnets, and a strong force is generated by narrowing a distance between the permanent magnets and the focus coil based upon the focus coil being rolled around the bobbin and the tracking coils. Accordingly, it is possible to improve the sensitivity and to prevent improper tilting of the actuator.Type: GrantFiled: April 29, 1999Date of Patent: January 14, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-ki Son, Byung-ryul Ryoo, Yong-hoon Lee, Seok-jung Kim
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Patent number: 6449229Abstract: 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 iType: GrantFiled: June 9, 1999Date of Patent: September 10, 2002Assignee: Samsung Electronics, Co., Ltd.Inventors: Seok-Jung Kim, Byung-Ryul Ryoo, Yong-Ki Son, Pyong-Yong Seong, Yong-Jae Lee, Tae-Kyung Kim, Jang-Hoon Yoo
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Patent number: 6381207Abstract: An optical pickup of an optical disk drive. The optical pickup includes a laser beam source for generating a laser beam; a pickup base having an objective lens for projecting the laser beam generated from the laser beam source to an information recording surface of an optical disk; a variation adjusting plate which is movably disposed on the pickup base to be moved in vertical and lateral directions, and has a rotational hole formed at a central portion thereof; and a rotation adjusting plate including a rotational section having a predetermined curvature which is inserted into the rotational hole of the variation adjusting plate, and with a laser beam source fixed therein, the rotation adjusting plate being rotated with respect to the variation adjusting plate. An optical system including a collimating lens and a reflective mirror is fixed to the pickup base.Type: GrantFiled: October 1, 1999Date of Patent: April 30, 2002Assignee: Samsung Electronics Co., Ltd.Inventors: Byung-ryul Ryoo, Pyong-yong Seong, Seok-jung Kim, Yong-ki Son, Tae-kyung Kim, Yong-jae Lee, Jang-hoon Yoo