Patents by Inventor Sang-Bae Lee
Sang-Bae Lee 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: 7597550Abstract: An molding apparatus includes a core having a recessed part corresponding to a protruding part of a molded article, an ejector pin movably provided in the core to eject the molded article, an ejector sleeve movably provided in the core to push the protruding part of the molded article, and an ejector actuating part to move the ejector pin and the ejector sleeve together to a separation position where the protruding part of the molded article is separated from the recessed portion of the core, to bring the ejector sleeve into a stop position so that the ejector sleeve does not protrude from the core, and to move the ejector pin from the separation position to a removal position where the molded article is spaced apart from the core by a predetermined distance. Accordingly, the molding apparatus is capable of preventing damage caused on an ejector sleeve.Type: GrantFiled: June 27, 2006Date of Patent: October 6, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Sang-hun Lee, Jong-won Lee, Sang-bae Lee
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Publication number: 20090208212Abstract: Provided is a bidirectional wavelength division multiplexed passive optical network (WDM-PON) which includes a central office (CO) that transmits and receives multiplexed optical signals, a remote node (RN) that communicates with the CO, receives a multiplexed optical signal to demultiplex, and receives a demultiplexed optical signal to multiplex, an optical network unit (ONU) that transmits and receives demultiplexed optical signals to and from the RN, operational and protective backbone optical fibers that connect the CO to the RN, and operational and protective distribution optical fibers that connect the RN to the ONU.Type: ApplicationFiled: August 4, 2008Publication date: August 20, 2009Inventors: Kwan-Il Lee, Sang-Bae Lee
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Publication number: 20090189871Abstract: A display device and method of sensing an input point using magnetic fluid the display device including: a touch panel part to receive a user input through a touch at an input point and to calculate a coordinate value of the input point; an electromagnet arrangement part comprising a plurality of electromagnets to generate a magnetic force on one or more electromagnets in a portion corresponding to the coordinate value; and a magnetic fluid part to obtain magnetism at the portion corresponding to the coordinate vale and to project in accordance with the generated magnetic force.Type: ApplicationFiled: January 23, 2009Publication date: July 30, 2009Applicant: Samsung Electronics Co., Ltd.Inventors: Sang-Jin YOON, Sang-Bae Lee, Geun-Sik Lim
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Patent number: 7495750Abstract: The present invention relates to a monitoring device for a rotating body, which can accurately measure signals from a fiber Bragg grating sensor provided on the rotating body by compensating a transmission loss variation and a distortion of the sensor signals. A rotation-side optical fiber has at least one deformation sensor at a portion thereof and a reference sensor at one end thereof. The sensors are made by forming a Bragg grating in the rotation-side optical fiber. A fixed-side optical fiber is mounted to the fixed body so as to be opposed to the one end of the rotation-side optical fiber. A signal processing unit detects a deformation of the rotating body by subtracting a signal corresponding to the light reflected from the reference sensor from a signal corresponding to the light reflected from the deformation sensor.Type: GrantFiled: April 18, 2008Date of Patent: February 24, 2009Assignee: Korea Institute of Science and TechnologyInventors: Yoha Hwang, Sang Bae Lee, Jong Min Lee
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Patent number: 7449498Abstract: The present invention relates to composite materials for bone replacement comprising organic and inorganic material, more particularly to composite materials for bone replacement wherein cyanoacrylate as organic material and osteo-conductive inorganic material as inorganic material are combined. The composite materials synthesized according to the present invention, maximize the merits of organic material and inorganic material and minimize their demerits. In detail, the organic material has the maintenance of shape and the adhesive property and the inorganic material has the osteo-conductivity on a new bone. Therefore, the composite materials of the present invention can be applied to fill bone defects and replace bones, since they retain the excellent physical property.Type: GrantFiled: December 8, 2005Date of Patent: November 11, 2008Assignee: Yesbio Co., Ltd.Inventors: Kyeong-Jun Park, Doug-Youn Lee, Sang-Bae Lee, Jeong-Jong Park, Ji-Ho Park, Kyoung-Nam Kim, Kwang-Mahn Kim
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Publication number: 20080232739Abstract: The present invention relates to a tunable dispersion and dispersion slope compensator based on an optical fiber grating in an optical communication system. The compensator includes: a first disk having a ring shape, wherein the first disk is configured to rotate; a second disk installed at an inner space of the first disk, wherein the second disk is configured not to rotate; a metal plate configured to bend as the first disk rotates; and an optical fiber grating adhered to the metal plate, wherein the optical fiber grating has different strains according to positions when the metal plate rotates.Type: ApplicationFiled: October 27, 2005Publication date: September 25, 2008Inventors: Jun Kye Bae, Young Jun Lee, Sang Hyuck Kim, Sang Bae Lee
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Publication number: 20080204707Abstract: The present invention relates to a monitoring device for a rotating body, which can accurately measure signals from a fiber Bragg grating sensor provided on the rotating body by compensating a transmission loss variation and a distortion of the sensor signals. A rotation-side optical fiber has at least one deformation sensor at a portion thereof and a reference sensor at one end thereof. The sensors are made by forming a Bragg grating in the rotation-side optical fiber. A fixed-side optical fiber is mounted to the fixed body so as to be opposed to the one end of the rotation-side optical fiber. A signal processing unit detects a deformation of the rotating body by subtracting a signal corresponding to the light reflected from the reference sensor from a signal corresponding to the light reflected from the deformation sensor.Type: ApplicationFiled: April 18, 2008Publication date: August 28, 2008Applicant: Korea Institute of Science And TechnologyInventors: Yoha Hwang, Sang Bae Lee, Jong Min Lee
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Publication number: 20080099959Abstract: A mold for injection molding and a molding method using the same, in which multiple gates are provided to a curved runner, thereby easily molding a product having a complicated shape and a large width, and in which a plurality of curved runners are provided, thereby easily ejecting forms that are filled in the runners. The mold includes first and second molds defining a mold cavity, a first gate disposed at a first position of the mold cavity, a second gate disposed at a second position of the mold cavity spaced apart from the first position, a first curved runner provided to the second mold so as to be connected to the first gate, and a second curved runner provided to the second mold so as to be connected to the second gate. The first and second curved runners have inlets that are connected with each other, and cross-sectional areas that are gradually reduced from the inlets to the first and second gates.Type: ApplicationFiled: August 21, 2007Publication date: May 1, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Duck Su CHOI, Sang Bae Lee, Im Bong Park, Rae Hak Jeong
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Patent number: 7251382Abstract: Disclosed herein is a functional tunable multichannel filter which is capable of adjusting channel spacing and/or a wavelength location using polarization controllers (?/2, (?/4). The functional tunable multichannel filter includes one or more polarization maintaining fibers, a first polarization controller (?/2), a second polarization controller (?/4) and a 3 dB coupler. Additionally, the functional tunable multichannel filter is configured to tune a wavelength and adjust channel spacing by adjusting polarization of an optical signal passing through each of the polarization maintaining fibers using the first and second polarization controllers.Type: GrantFiled: June 29, 2005Date of Patent: July 31, 2007Assignee: Korea Institute of Science and TechnologyInventors: Young Geun Han, Sang Hyuck Kim, Sang Bae Lee
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Publication number: 20070160091Abstract: Disclosed are a continuous wave supercontinuum laser source resonator using low-priced multimode semiconductor lasers as pumping light and applying a rare-earth doped optical fiber and a Highly Nonlinear Dispersion Shifted Fiber (HNL-DSF) to a ring resonator structure to embody a continuous wave supercontinuum light source, and a medical diagnostic apparatus using the same. The resonator consists of a pump combiner for inputting pumping light into the resonator; a rare-earth doped optical fiber for receiving and converting the pumping light into seed light of a predetermined wavelength band; a Highly Nonlinear Dispersion Shifted Fiber (HNL-DSF) for converting the light converted by the rare-earth doped optical fiber and oscillating in the resonator into a continuous wave supercontinuum laser source; and a coupler for outputting the supercontinuum laser source generated from the Highly Nonlinear Dispersion Shifted Fiber (HNL-DSF).Type: ApplicationFiled: October 19, 2006Publication date: July 12, 2007Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jun Han Lee, Young Geun Han, Sang Bae Lee, Chang Seok Kim
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Patent number: 7171079Abstract: Provided is a tunable dispersion compensator based on an optical fiber grating for use in an optical transmission system. A tunable dispersion compensator comprises: a disk; a ring surrounding the disk, wherein the ring is rotatable independent of the disk; and a bendable plate crossing the disk and having end parts configured to move with the rotation of the ring, wherein at least one of the optical fiber grating is attached to the plate.Type: GrantFiled: September 8, 2004Date of Patent: January 30, 2007Assignee: Korea Institute of Science and TechnologyInventors: Jun-Kye Bae, Jun-Hee Kim, Young-Geun Han, Sang-Hyuck Kim, Sang-Bae Lee
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Publication number: 20070003659Abstract: An molding apparatus includes a core having a recessed part corresponding to a protruding part of a molded article, an ejector pin movably provided in the core to eject the molded article, an ejector sleeve movably provided in the core to push the protruding part of the molded article, and an ejector actuating part to move the ejector pin and the ejector sleeve together to a separation position where the protruding part of the molded article is separated from the recessed portion of the core, to bring the ejector sleeve into a stop position so that the ejector sleeve does not protrude from the core, and to move the ejector pin from the separation position to a removal position where the molded article is spaced apart from the core by a predetermined distance. Accordingly, the molding apparatus is capable of preventing damage caused on an ejector sleeve.Type: ApplicationFiled: June 27, 2006Publication date: January 4, 2007Applicant: Samsung Electronics Co., Ltd.Inventors: Sang-hun Lee, Jong-won Lee, Sang-bae Lee
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Publication number: 20060276562Abstract: The present invention relates to composite materials for bone replacement comprising organic material and inorganic material, more particularly to composite materials for bone displacement wherein cyanoacrylate as organic material and osteo-conductive inorganic material as inorganic material are combined. The composite materials synthesized according to the present invention, maximize the merits of organic material and inorganic material and minimize their demerits. In detail, the organic material has the maintenance of shape and the adhesive property and the inorganic material has the osteo-conductivity on a new bone. Therefore, the composite materials of the present invention can be applied to fill bone defects and replace bones, since they retain the excellent physical property.Type: ApplicationFiled: December 8, 2005Publication date: December 7, 2006Inventors: Kyeong-Jun Park, Doug-Youn Lee, Sang-Bae Lee, Jeong-Jong Park, Ji-Ho Park, Kyoung-Nam Kim, Kwang-Mahn Kim
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Patent number: 7003199Abstract: The present invention relates to a tunable distribution compensator, including: an optical fiber having a chirped optical fiber grating; first and second frames having first and second stepped portions, respectively, wherein the first stepped portion is symmetrically faced to the second stepped portion; a first metal plate with a predetermined length for attaching the optical fiber; a second metal plate seated on the first and second stepped portions; and a bending unit connected to the first and second frames and the second metal plate for symmetrically bending the optical fiber.Type: GrantFiled: December 27, 2004Date of Patent: February 21, 2006Assignee: Korea Institute of Science and TechnologyInventors: Sun-Min Choi, Jun-Kye Bae, Jun-Hee Kim, Young-Geun Han, Sang-Hyuck Kim, Sang-Bae Lee
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Publication number: 20050259697Abstract: Disclosed are a Raman or erbium-doped fiber laser using a few-mode fiber grating, and a long-distance remote sensor using the same that can simultaneously measure temperature and strain by separating temperature and strain components using Raman amplification or erbium amplification. When a multi-wavelength Raman or erbium-doped laser is configured by means of a short-period fiber grating serving as a few-mode fiber grating at one side of a resonator and a chirped fiber Bragg grating or tunable chirped fiber Bragg grating at the other side of the resonator, multi-wavelength laser signals are generated in different modes. Because wavelength shift and reflectivity vary with a change in temperature and strain, temperature and strain components can be simultaneously measured. Because an optical fiber of several tens of kilometers is used, it can be utilized as a sensing probe of the long-distance remote sensor.Type: ApplicationFiled: December 29, 2004Publication date: November 24, 2005Applicant: Korea Institute of Science and TechnologyInventors: Young-Geun Han, Sang-Bae Lee, Sang-Hyuck Kim, Ju-Han Lee
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Publication number: 20050169578Abstract: The present invention relates to a tunable distribution compensator, including: an optical fiber having a chirped optical fiber grating; first and second frames having first and second stepped portions, respectively, wherein the first stepped portion is symmetrically faced to the second stepped portion; a first metal plate with a predetermined length for attaching the optical fiber; a second metal plate seated on the first and second stepped portions; and a bending unit connected to the first and second frames and the second metal plate for symmetrically bending the optical fiber.Type: ApplicationFiled: December 27, 2004Publication date: August 4, 2005Inventors: Sun-Min Choi, Jun-Kye Bae, Jun-Hee Kim, Young-Geun Han, Sang-Hyuck Kim, Sang-Bae Lee
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Publication number: 20050084209Abstract: Provided is a tunable dispersion compensator based on an optical fiber grating for use in an optical transmission system. A tunable dispersion compensator comprises: a disk; a ring surrounding the disk, wherein the ring is rotatable independent of the disk; and a bendable plate crossing the disk and having end parts configured to move with the rotation of the ring, wherein at least one of the optical fiber grating is attached to the plate.Type: ApplicationFiled: September 8, 2004Publication date: April 21, 2005Inventors: Jun-Kye Bae, Jun-Hee Kim, Young-Geun Han, Sang-Hyuck Kim, Sang-Bae Lee
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Publication number: 20040086227Abstract: Disclosed is an optical fiber grating comprising: optic fiber having periodically formed gratings; and a temperature control method for independently controlling temperature along grating sections. In the optical fiber, the temperature is controlled along grating sections, the desired spectrum can be obtained by varying the refractive index of each unit section, and the fiber gratings can be applied to various optical communication devices.Type: ApplicationFiled: May 14, 2003Publication date: May 6, 2004Applicant: Korea Institute of Science and TechnologyInventors: Jun-Kye Bae, Sang-Hyuck Kim, Je-Myung Jeong, Sang-Bae Lee
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Publication number: 20040047559Abstract: The present invention discloses a multi-channel dispersion compensator and an optical transmission system having the same. According to the multi-channel dispersion compensator of the present invention, chirped optical fiber gratings are coupled in parallel to an arrayed waveguide grating device. The arrayed waveguide grating device demultiplexes multiplexed optical signal pulses and again multiplexes the demultiplexed optical signal pulses.Type: ApplicationFiled: December 6, 2002Publication date: March 11, 2004Inventors: Jong-Won Lee, Sang-Hyuck Kim, Sang-Bae Lee
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Patent number: 6687435Abstract: An optical fiber grating coder includes predetermined codewords imprinted into an optical fiber in the form of a plurality of striations through an apparatus including a light source, an amplitude mask, and a phase mask. A fabrication method of the optical fiber grating coder includes providing a light source, an amplitude mask designed for predetermined codewords, a phase mask, and an optical fiber; exposing the optical fiber; and forming an optical fiber grating coder into the optical fiber. A fabrication apparatus of the optical fiber grating coder includes a light source; an amplitude mask designed for predetermined codewords; a phase mask; and an optical fiber where the optical fiber grating coder is to be formed.Type: GrantFiled: November 9, 2001Date of Patent: February 3, 2004Assignee: Korea Institute of Science and TechnologyInventors: Hyun Deok Koo, Sang Bae Lee, Sang Sam Choi