Patents by Inventor Eun-goo Kim
Eun-goo Kim 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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Publication number: 20240101810Abstract: The present invention relates to a composition for forming a composite polymer film, a method for preparing the composition for forming a composite polymer film, a composite polymer film and a method for preparing the composite polymer film. The composition for forming a composite polymer film comprises: a fluorine-based polymer solution comprising a fluorine-based polymer; and polyvinylidene fluoride nanoparticles dispersed in the fluorine-based polymer solution. The method for preparing the composition for forming a composite polymer film comprises the steps of: preparing a fluorine-based polymer solution comprising a fluorine-based polymer; and dispersing polyvinylidene fluoride nanoparticles in the fluorine-based polymer solution. The composite polymer film comprises: a polymer matrix formed from a fluorine-based polymer; and polyvinylidene fluoride nanoparticles dispersed in the polymer matrix.Type: ApplicationFiled: September 4, 2020Publication date: March 28, 2024Applicants: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Eun Ho SOHN, Shin Hong YOOK, Hong Suk KANG, In Joon PARK, Sang Goo LEE, Soo Bok LEE, Won Wook SO, Hyeon Jun HEO, Dong Je HAN, Seon Woo KIM
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Patent number: 9263080Abstract: Provided is an optical pickup device and a method of aligning a twin-light source in an optical disc drive. The method operates two light emitting chips in the light source simultaneously to cause two laser beams to be transmitted through a grating element at the same time. Location errors and rotation errors of the two light emitting chips with respect to the grating element may be corrected while monitoring the laser beams transmitted through the grating element.Type: GrantFiled: February 19, 2014Date of Patent: February 16, 2016Assignee: Toshiba Samsung Storage Technology Korea CorporationInventors: Jung-bae Oh, Il-boon Ko, Ki-bok Kim, Hyun-wook Nam, Eun-goo Kim
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Patent number: 9142243Abstract: Provided are an optical pickup and an optical information storage system including the same. The optical pickup includes a photodetector that receives a main light beam and a plurality of sub-light beams reflected from an information storage medium and diffracted by a diffracting element. The photo detector detects a tracking error signal using zeroth-order light as the main light beam and using one of first-order light and third-order light as the sub-light beam based on a type of an optical information storage medium.Type: GrantFiled: February 24, 2014Date of Patent: September 22, 2015Assignee: Toshiba Samsung Storage Technology Korea CorporationInventors: Ki-bok Kim, Jin-ho Jeong, Eun-goo Kim, Jung-bae Oh, Seung-man Han
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Publication number: 20140245333Abstract: Provided are a method and apparatus for focusing a laser beam on an optical disc. According to various aspects, the apparatus may include an objective lens which has a numerical aperture below what is standardized for the optical disc. In addition, a collimating lens which is used to focus a laser beam on the objective lens may be positioned at a fixed location. Despite the fixed location, the apparatus may support data recording/reproducing on multiple layers of the optical disc.Type: ApplicationFiled: February 25, 2014Publication date: August 28, 2014Applicant: Toshiba Samsung Storage Technology Korea CorporationInventors: Jin-ho JEONG, Eun-goo KIM
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Publication number: 20140241141Abstract: Provided are an optical pickup and an optical information storage system including the same. The optical pickup includes a photodetector that receives a main light beam and a plurality of sub-light beams reflected from an information storage medium and diffracted by a diffracting element. The photo detector detects a tracking error signal using zeroth-order light as the main light beam and using one of first-order light and third-order light as the sub-light beam based on a type of an optical information storage medium.Type: ApplicationFiled: February 24, 2014Publication date: August 28, 2014Applicant: Toshiba Samsung Storage Technology Korea CorporationInventors: Ki-bok KIM, Jin-ho JEONG, Eun-goo KIM, Jung-bae OH, Seung-man HAN
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Publication number: 20140233367Abstract: Provided is an optical pickup device and a method of aligning a twin-light source in an optical disc drive. The method operates two light emitting chips in the light source simultaneously to cause two laser beams to be transmitted through a grating element at the same time. Location errors and rotation errors of the two light emitting chips with respect to the grating element may be corrected while monitoring the laser beams transmitted through the grating element.Type: ApplicationFiled: February 19, 2014Publication date: August 21, 2014Applicant: Toshiba Samsung Storage Technology Korea CorporationInventors: Jung-bae OH, Il-boon KO, Ki-bok KIM, Hyun-wook NAM, Eun-goo KIM
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Patent number: 8750087Abstract: An optical pickup device corresponding to a plurality of media is provided. The optical pickup device includes a light emitting system and a light receiving system including a plurality of light sources and a light transmission system shared by the light emitting system and the light receiving system, configured to irradiate light on a medium, and receive light reflected from the medium. The light transmission system irradiates light from the light emitting system to be appropriately focused on the medium, receives light reflected from the medium, and transports light to the light receiving system. The light transmission system includes one beam splitter corresponding to the light emitting system and the light receiving system and a position-changing collimating lens shared to correspond to a plurality of media. The position-changing collimating lens is disposed between the beam splitter and the medium, the position being controlled according to optical characteristics of the media.Type: GrantFiled: August 18, 2010Date of Patent: June 10, 2014Assignee: Toshiba Samsung Storage Technology Korea CorporationInventors: Ki-bok Kim, Eun-goo Kim, Hyun-wook Nam, Jung-bae Oh, Ji-sun Ahn
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Publication number: 20110044155Abstract: An optical pickup device corresponding to a plurality of media is provided. The optical pickup device includes a light emitting system and a light receiving system including a plurality of light sources and a light transmission system shared by the light emitting system and the light receiving system, configured to irradiate light on a medium, and receive light reflected from the medium. The light transmission system irradiates light from the light emitting system to be appropriately focused on the medium, receives light reflected from the medium, and transports light to the light receiving system. The light transmission system includes one beam splitter corresponding to the light emitting system and the light receiving system and a position-changing collimating lens shared to correspond to a plurality of media. The position-changing collimating lens is disposed between the beam splitter and the medium, the position being controlled according to optical characteristics of the media.Type: ApplicationFiled: August 18, 2010Publication date: February 24, 2011Applicant: Toshiba Samsung Storage Technology Korea CorporationInventors: Ki-bok KIM, Eun-goo KIM, Hyun-wook NAM, Jung-bae OH, Ji-sun AHN
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Patent number: 7420895Abstract: A method and apparatus for detecting a signal to determine on-track/off-track and/or a track cross direction, using a detection signal corresponding to a reflected main light beam and detection signals respectively corresponding to reflected first and second sub light beams, and an optical recording and/or reproducing apparatus using the same are provided. When detection signals respectively corresponding to one side portions, in a direction corresponding to a radial direction of the optical information storage medium, of the respective main light beam and first and second sub light beams are referred to as a first main signal, a first sub signal, and a second sub signal, respectively, the method and apparatus include obtaining a first operational signal, which is used to determine on-track/off-track and/or a track cross direction, by performing a subtraction on the combination of the first and second sub signals, and the first main signal.Type: GrantFiled: December 29, 2003Date of Patent: September 2, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Eun-goo Kim, Chun-gi Kim, Kyoung-hwan Park, Ji-hwan Lim
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Patent number: 7403458Abstract: A compatible optical pickup, including first and second light sources for emitting lights with different wavelengths and first and second photodetectors for detecting an information signal and/or an error signal, and a method of detecting the amount of output light using the compatible optical pickup. The first and second photodetectors monitor the amount of light output from the second and first light sources respectively such that no extra front photodetectors are required. Thus, the number of optical component parts included in the optical pickup can be reduced, thereby lowering the manufacturing costs for the optical pickup. Also, there is no need to secure a space in a base where a front photodetector is to be installed, so the base is simplified. Thus, inferior moldings are reduced, and the durability of a mold can be prolonged.Type: GrantFiled: January 29, 2004Date of Patent: July 22, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Ji-hwan Lim, Ju-hyung Lee, Pyong-yong Seong, Eun-goo Kim, Chun-gi Kim, Kyoung-hwan Park
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Patent number: 7251209Abstract: An optical pickup for a recording medium includes a light source, an objective lens, a main photodetector, and a front photodetector. The configuration of the optical pickup enables converging or diverging of light to be incident on a plate beam splitter so that light can be received at an effective light receiving region of a front photodetector without interference due to internal reflection occurring in the plate beam splitter. In the alternative, a wedge beam splitter in the optical pickup includes first and second mirror planes at a predetermined angle to transmit and reflect incident light at a predetermined ratio. In the optical pickup, an amount of light that is exactly proportional to an output power of the light source can be detected, where the output power of the light source can be accurately controlled, thereby improving a linearity of the output power of the light source.Type: GrantFiled: April 29, 2003Date of Patent: July 31, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-jun Cho, Pyong-yong Seong, Seung-man Han, Hyun-seob Choi, Eun-goo Kim, Jong-koog Lee, Kun-soo Kim, Chun-gi Kim
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Publication number: 20040257925Abstract: A compatible optical pickup, including first and second light sources for emitting lights with different wavelengths and first and second photodetectors for detecting an information signal and/or an error signal, and a method of detecting the amount of output light using the compatible optical pickup. The first photodetector monitors the amount of light output from the second light source, and the second photodetector monitors the amount of light output from the first light source. Since the first and second photodetectors are used to detect a signal for use in monitoring the amount of light output from each of the second and first light sources, no extra front photodetectors are required. Thus, the number of optical component parts included in the optical pickup can be reduced, thereby lowering the manufacturing costs for the optical pickup. Also, there is no need to secure a space in a base where a front photodetector is to be installed, so the base is simplified.Type: ApplicationFiled: January 29, 2004Publication date: December 23, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Ji-hwan Lim, Ju-hyung Lee, Pyong-yong Seong, Eun-goo Kim, Chun-gi Kim, Kyoung-hwan Park
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Publication number: 20040223424Abstract: A method and apparatus for detecting a signal to determine on-track/off-track and/or a track cross direction, using a detection signal corresponding to a reflected main light beam and detection signals respectively corresponding to reflected first and second sub light beams, and an optical recording and/or reproducing apparatus using the same are provided. When detection signals respectively corresponding to one side portions, in a direction corresponding to a radial direction of the optical information storage medium, of the respective main light beam and first and second sub light beams are referred to as a first main signal, a first sub signal, and a second sub signal, respectively, the method and apparatus include obtaining a first operational signal, which is used to determine on-track/off-track and/or a track cross direction, by performing a subtraction on the combination of the first and second sub signals, and the first main signal.Type: ApplicationFiled: December 29, 2003Publication date: November 11, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Eun-goo Kim, Chun-gi Kim, Kyoung-hwan Park, Ji-hwan Lim
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Publication number: 20040202070Abstract: Provided are an apparatus and method for stably generating a tracking error signal in an optical recording/reading system irrespective of a disc track pitch.Type: ApplicationFiled: October 3, 2003Publication date: October 14, 2004Applicant: SAMSUNG Electronics Co., Ltd.Inventors: Kyoung-hwan Park, Eun-goo Kim, Pyong-yong Seong, Chul-ho Jeon
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Publication number: 20030202453Abstract: An optical pickup for a recording medium includes a light source, an objective lens, a main photodetector, and a front photodetector. The configuration of the optical pickup enables converging or diverging of light to be incident on a plate beam splitter so that light can be received at an effective light receiving region of a front photodetector without interference due to internal reflection occurring in the plate beam splitter. In the alternative, a wedge beam splitter in the optical pickup includes first and second mirror planes at a predetermined angle to transmit and reflect incident light at a predetermined ratio. In the optical pickup, an amount of light that is exactly proportional to an output power of the light source can be detected, where the output power of the light source can be accurately controlled, thereby improving a linearity of the output power of the light source.Type: ApplicationFiled: April 29, 2003Publication date: October 30, 2003Applicant: Samsung Electronics Co., Ltd.Inventors: Yong-jun Cho, Pyong-yong Seong, Seung-man Han, Hyun-seob Choi, Eun-goo Kim, Jong-koog Lee, Kun-soo Kim, Chun-gi Kim
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Patent number: 6552974Abstract: An optical pickup compatible between a digital video disc read only memory (DVD-ROM) and a compact disc rewritable (CD-RW), which is a member of the CD family media. The compatible optical pickup includes: a first light source for emitting a first light having a predetermined wavelength; a second light source for emitting a second light having a long wavelength relative to the first light; an optical path changing unit for changing the traveling path of an incident light; an objective lens for condensing the first and second lights onto optical discs having different thicknesses, respectively; and a main photodetector for detecting an information signal and error signals from the first and second lights which have been reflected by the optical discs and passed through the optical path changing unit.Type: GrantFiled: March 29, 2000Date of Patent: April 22, 2003Assignee: Samsung Electronics Co., Ltd.Inventor: Eun-goo Kim
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Patent number: 5739608Abstract: An actuator for an optical pickup includes a first permanent magnet for supporting an objective lens. A focusing coil is wound around the circumference of the first permanent magnet for providing a driving force for vertical movement of the first permanent magnet. A plurality of tracking coils are placed at predetermined portions of the circumference of the first permanent magnet and provide a driving force for lateral movement of the first permanent magnet. A second permanent magnet is installed around the first permanent magnet and is separated from the first permanent magnet by a predetermined distance, for levitating the first permanent magnet which has the objective lens and the focusing and tracking coils disposed thereon, by interacting with the first permanent magnet.Type: GrantFiled: January 8, 1997Date of Patent: April 14, 1998Assignee: Samsung Electronics Co., Ltd.Inventor: Eun-goo Kim