Patents by Inventor Woo Sup Kim
Woo Sup 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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Patent number: 9118254Abstract: Disclosed is a DC-DC converter. The DC-DC converter includes a power input unit to which power is applied, a first module comprising a first transformer and a second transformer to output a first output power transformed according to operations of a first switch and a second switch connected with the first transformer and the second transformer by using the applied power, a second module comprising a third transformer and a fourth transformer to output a second output power transformed according to operations of a third switch and a fourth switch connected with the third transformer and the fourth transformer by using the applied power, an output unit to output a sum of the first output power and the second output power, and a controller to control an interleaving operations between the first module and the second module.Type: GrantFiled: July 1, 2013Date of Patent: August 25, 2015Assignees: LSIS Co., Ltd., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Woo Sup Kim, Jae Ho Lee, Chun Suk Yang, Seoung Woon Lee, Bo Hyung Cho
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Publication number: 20150214722Abstract: A reverse battery protection device and an operating method thereof are provided. The reverse battery protection device includes a signal generating unit measuring a voltage of a battery, and, when the measured voltage is not smaller than a reference voltage, generating an electrical signal, a signal converting unit converting the generated electrical signal into a DC voltage, and a switch unit switching to allow a current to flow between the battery and a converter, when the converted DC voltage is received.Type: ApplicationFiled: November 5, 2014Publication date: July 30, 2015Applicant: LSIS CO., LTD.Inventors: Sung Sik PARK, Woo Sup KIM
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Publication number: 20150180364Abstract: A driving device of a synchronous rectification apparatus is provided. The driving device includes a voltage detection part disposed on a power input terminal to detect a voltage value of a power inputted through the power input terminal, an adjustment part receiving the voltage value detected through the voltage detection part, the adjustment part adjusting the receive voltage value to output the adjusted voltage value, and a comparison part receiving the voltage value adjusted through the adjustment part into a positive terminal and a synchronous rectification starting value into a negative terminal, the comparison part outputting an command value of the synchronous rectification apparatus, which is obtained by comparing the received voltage value with the synchronous rectification starting value.Type: ApplicationFiled: August 13, 2014Publication date: June 25, 2015Applicant: LSIS CO., LTD.Inventors: Woo Sup KIM, Chul Woo PARK, Jae Ho LEE, Hong Tae PARK
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Publication number: 20150175021Abstract: A power conversion device for charging first and second batteries is provided. The power conversion device includes an input unit, a first power conversion unit, a second power conversion unit, a third power conversion unit, and a switching unit connecting the first power conversion unit to the second power conversion unit in the first operation mode according to a control signal supplied from the outside, the switching unit connecting the second power conversion unit to the third power conversion unit in the second operation mode according to the control signal supplied from the outside.Type: ApplicationFiled: August 7, 2014Publication date: June 25, 2015Applicant: LSIS CO., LTD.Inventors: Woo Sup KIM, Jae Ho LEE, Hong Tae PARK, Young Min KIM
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Publication number: 20150171725Abstract: A low voltage DC/DC converter (LDC) control apparatus for controlling an LDC including a transformer and a PWM controller is provided. The low voltage DC/DC converter (LDC) control apparatus includes an input current calculating unit calculating an input current of the LDC by using magnetization inductance information on the transformer and effective duty information on the PWM controller; an output current calculating unit calculating the instantaneous value and average value of an output current based on the input current calculated by the input current calculating unit; and an LDC control unit generating a control signal for over current protection (OCP) or power limit based on the instantaneous value and average value of the output current calculated by the output current calculating unit, wherein the LDC control unit outputs the generated control signal to the PWM controller.Type: ApplicationFiled: July 22, 2014Publication date: June 18, 2015Applicant: LSIS CO., LTD.Inventors: Chul Woo PARK, Woo Sup KIM
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Publication number: 20150123471Abstract: Embodiments provide an apparatus controlling a low voltage DC-DC converter (LDC) in an electric vehicle that enables the LDC to autonomously wake up and operate when at least one of an ignition IGN signal and other electric components linked to the LDC is in the ON state and enables the LDC to recognize that other electric components linked to the LDC are all in the OFF state, and autonomously operate in a power-off state when other electric components linked to the LDC are all in the OFF state.Type: ApplicationFiled: August 11, 2014Publication date: May 7, 2015Applicant: LSIS CO., LTD.Inventors: Dong Su LEE, Woo Sup KIM
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Patent number: 8922320Abstract: The embodiment relates to a transformer. A transformer according to an aspect includes: a first coil assembly including a first core, a first bobbin coupled to the first core, and a first coil provided on the first bobbin; and a second coil assembly coupled to the first coil assembly, and including a second core, a second bobbin coupled to the second core, and a second coil provided on the second bobbin.Type: GrantFiled: September 13, 2013Date of Patent: December 30, 2014Assignee: LSIS Co., Ltd.Inventors: Jun Seok Eom, Woo Sup Kim
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Publication number: 20140266554Abstract: A transformer module for an electric vehicle is provided. The transformer module includes a bobbin round which a primary-side coil is wound, a printed circuit board, and a secondary-side bus bar disposed between the bobbin and the printed circuit board, wherein a pattern part formed of an electrically conductive material to contact the bus bar is provided on the printed circuit board to electrically connect the pattern part to the bus bar in parallel.Type: ApplicationFiled: January 3, 2014Publication date: September 18, 2014Applicant: LSIS CO., LTD.Inventors: Jong In SUN, Woo Sup KIM, Bo Hyun YOUN, Chun Suk YANG
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Publication number: 20140104891Abstract: Disclosed is a DC-DC converter. The DC-DC converter includes a power input unit to which power is applied, a first module comprising a first transformer and a second transformer to output a first output power transformed according to operations of a first switch and a second switch connected with the first transformer and the second transformer by using the applied power, a second module comprising a third transformer and a fourth transformer to output a second output power transformed according to operations of a third switch and a fourth switch connected with the third transformer and the fourth transformer by using the applied power, an output unit to output a sum of the first output power and the second output power, and a controller to control an interleaving operations between the first module and the second module.Type: ApplicationFiled: July 1, 2013Publication date: April 17, 2014Inventors: Woo Sup KIM, Jae Ho LEE, Chun Suk YANG, Seoung Woon LEE, Bo Hyung CHO
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Publication number: 20140083755Abstract: A laminated chip electronic component includes: a ceramic body including internal electrodes and dielectric layers; external electrodes formed to cover both end portions of the ceramic body in a length direction; an active layer in which the internal electrodes are disposed in an opposing manner, while having the dielectric layers interposed therebetween, to form capacitance; and upper and lower cover layers formed on upper and lower portions of the active layer in a thickness direction, the lower cover layer having a thickness greater than that of the upper cover layer.Type: ApplicationFiled: December 13, 2012Publication date: March 27, 2014Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Sun Cheol LEE, Woo Sup KIM, Dong Gun KIM, Kyeong Jun KIM, Kyu Ho LEE
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Publication number: 20140077916Abstract: The embodiment relates to a transformer. A transformer according to an aspect includes: a first coil assembly including a first core, a first bobbin coupled to the first core, and a first coil provided on the first bobbin; and a second coil assembly coupled to the first coil assembly, and including a second core, a second bobbin coupled to the second core, and a second coil provided on the second bobbin.Type: ApplicationFiled: September 13, 2013Publication date: March 20, 2014Applicant: LSIS CO., LTD.Inventors: Jun Seok EOM, Woo Sup KIM
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Publication number: 20070279405Abstract: A plasma display and a driving device therefor. In a sustain discharge driving circuit that includes a power recovery circuit and a sustain voltage supply circuit, a transformer is used. The transformer includes a primary coil and a secondary coil that are coupled with each other. The primary coil of the transformer is connected in parallel to a panel capacitor serving as a capacitive load so as to increase a change of a voltage that is applied to an inductor, such that a voltage rising period and a voltage falling period are reduced. With the reduction of the turn-on time of a switch, the power consumption of the switch is reduced. Further, as the inductor initially stores current, the occurrence of hard switching is reduced when a sustain discharge voltage is applied and elements of the circuit are protected.Type: ApplicationFiled: March 16, 2007Publication date: December 6, 2007Inventors: Pankaj Agarwal, Woo-Sup Kim, Su-Yong Chae, Bo-Hyung Cho
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Patent number: 6917513Abstract: The non reducible dielectric ceramic composition comprising a main component of (Ba1-xCax)m(Ti1-yZry)O3, subcomponents of MgO, Re2O3, MO, MnO and V2O5 where Re is one or more elements selected from the group of Y, Dy and Ho and M is one or two elements selected from the group of Ba and Ca, and a sintering aid of SiO2, wherein when the composition is represented by the formula 100(Ba1-xCax)m(Ti1-yZry)O3+bMgO+cRe2O3+dMO+eMnO+fV2O5+gSiO2, the ratio of the components satisfies the conditions of 0.005?x?0.15, 0.995?m?1.03, 0.0005?y?0.005, 0.1?b?3.0, 0.1?c?3.0, 0.05?d?2.0, 0.05?e?50.3, 0.0.?f?0.1, and 0.2?g?3.0 based on the molar ratio.Type: GrantFiled: July 7, 2004Date of Patent: July 12, 2005Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Woo Sup Kim, Chan Kong Kim, Kang Heon Hur, Jong Han Kim
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Patent number: 6876538Abstract: Disclosed herein are a multilayer ceramic capacitor, a dielectric composition capable of sintering at a lower temperature and having a small variation in dielectric constant, a multilayer ceramic capacitor using the same, and a method thereof. The dielectric composition includes BaTiO3, MgCO3, Y2O3, Cr2O3, Mn2V2O7, and xBaO-yZrO2-zSiO2 acting as a sintering agent (where 0.1?x?0.3, 0.1?y?0.3 and 0.4?z?0.8, x+y+z=1), wherein when representing the composition with the formula aBaTiO3-bMgCO3-cY2O3-dCr2O3-e(Mn2V2O7)-f(xBaO-yZrO2-zSiO2), the ratio of the components satisfies the conditions of a=100, 0.1?b?3.0, 0.3?c?2.0, 0.05?d?0.2, 0.01?e?1.5, 0.5?f?3.0 based on the molar ratio. When manufacturing a multilayer ceramic capacitor of a higher capacitance, which is formed to have the thin layer structure of 4 ?m or less, short circuits between internal electrodes and the deterioration in capacitance due to massing of the electrodes into ball at the ends may be remarkably reduced.Type: GrantFiled: May 25, 2004Date of Patent: April 5, 2005Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Jong Han Kim, Kang Heon Hur, Woo Sup Kim, Joon Hee Kim
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Patent number: 6849567Abstract: A low temperature sinterable dielectric ceramic composition and a multilayer ceramic chip capacitor. The dielectric ceramic composition is expressed by the general formula: aBaTiO3-bMgCO3-cY2O3-dCr2O3-eV2O5-f(xZrO2-y(K,Li)2O-zSiO2) (x+y+z=1; 0.05?x?0.18, 0.01?y?0.08, and 0.7.4?z?0.93); in which a, b, c, d, e and f are molar ratios; a=100, 1.0?b?2.0, 0.2?c?2.0, 0.02?d?0.3, 0.02?e?0.3, and 0.5?f<2. The multilayer ceramic chip capacitor is prepared using the dielectric ceramic composition. The dielectric composition according to the present invention can be sintered at a low temperature without decrease of a dielectric constant, making it possible to make ultra thin-layered dielectrics.Type: GrantFiled: June 19, 2003Date of Patent: February 1, 2005Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Joon Hee Kim, Kang Heon Hur, Hae Sung Park, Jong Han Kim, Woo Sup Kim
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Patent number: 6846767Abstract: A dielectric ceramic composition of high dielectric constant and low dielectric loss, which can be co-fired with Ag electrodes, is provided for use in various parts of electric and electronic appliances. Based on a base composition with a high dielectric constant, the composition comprises glass frit and optionally CuO, as represented by the following formula: a wt. % {x CaO-y1 Sm2O3-y2 Nd2O3-w Li2O-z TiO2}+b wt. % (ZnO—B2O3—SiO2 based or Li2O—B2O3—SiO2 based glass frit)+c wt. % CuO wherein, 13.0 mol %?x?20.0 mol %; 10.0 mol %?y1+y2?17.0 mol %; 6.0 mol %?w?11.0 mol %; 60.0 mol %?z?67.0 mol % with the proviso that x+y1+y2+w+z=100; 85.0 wt. %?a?97.0 wt. %; 3.0 wt. %?b?15.0 wt. %; and c?7.0 wt. %.Type: GrantFiled: April 17, 2002Date of Patent: January 25, 2005Assignee: Samsung Electr-Mechanics Co., Ltd.Inventors: Woo Sup Kim, Kang Heon Hur, Jong Han Kim, Joon Hee Kim
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Patent number: 6777363Abstract: Multilayer ceramic chip capacitors which satisfy X5R (−55 to 85° C., &Dgr;C=±15%) requirements and which are compatible with reducing atmosphere sintering conditions so that base metals such as nickel and nickel alloys may be used for internal electrodes are made in accordance with the invention. The multilayer ceramic chip capacitor comprises alternately staked, dielectric ceramic layers and internal electrode layers wherein dielectric ceramic layers comprise per 100 mol of BaTiO3, BaTiO3; MgCO3: 0.2 to 3.0 mol; at least one selected from Y2O3, Ho2O3, Dy2O3 and Yb2O3: 0.05 to 1.5 mol; Cr2O3: 0.1 to 1.5 mol; BaxCa(1−x)SiO3 (provided that 0≦x≦1): 0.2 to 3.0 mol; and Mn2V2O7: 0.01 to 1.5 mol. The multilayer ceramic chip capacitor of the present invention has a high dielectric constant, satisfies X5R characteristics can be sintered at a low temperature of 1,200 to 1,250° C.Type: GrantFiled: December 19, 2002Date of Patent: August 17, 2004Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Hae Sung Park, Kang Heon Hur, Woo Sup Kim, Joon Hee Kim, Jong Han Kim
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Publication number: 20040106510Abstract: A low temperature sinterable dielectric ceramic composition and a multilayer ceramic chip capacitor. The dielectric ceramic composition is expressed by the general formula: aBaTiO3-bMgCO3-cY2O3-dCr2O3-eV2O5-f(xZrO2-y(K,Li)2O-zSiO2) (x+y+z=1; 0.05≦x≦0.18, 0.01≦y≦0.08, and 0.7.4≦z≦0.93); in which a, b, c, d, e and f are molar ratios; a=100, 1.0≦b≦2.0, 0.2≦c≦2.0, 0.02≦d≦0.3, 0.02≦e≦0.3, and 0.5≦f<2. The multilayer ceramic chip capacitor is prepared using the dielectric ceramic composition. The dielectric composition according to the present invention can be sintered at a low temperature without decrease of a dielectric constant, making it possible to make ultra thin-layered dielectrics.Type: ApplicationFiled: June 19, 2003Publication date: June 3, 2004Inventors: Joon Hee Kim, Kang Heon Hur, Hae Sung Park, Jong Han Kim, Woo Sup Kim
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Patent number: 6740614Abstract: A dielectric ceramic composition of high dielectric constant and low dielectric loss, which can be co-fired with Ag electrodes, is provided for use in various parts of electric and electronic appliances. The composition is represented by the following chemical formula: a wt. % {x BaO—y1Nd2O3—y2Sm2O3—w Bi2O3—z TiO2}+ b wt. % (ZnO—B2O3—SiO2—PbO based glass frit)+ c wt. % CuO wherein, 10.0 mol %≦x≦20.0 mol %; 7.0 mol %≦y1+y2≦20.0 mol %; 0.5 mol %≦w≦5.0 mol %; 60.0 mol %≦z≦80.0 mol %, with the proviso that x+y1+y2+w+z=100; 80.0 wt. %≦a≦98.0 wt. %; 1.0 wt. %≦b≦10.0 wt. %; 1.0 wt. %≦c≦10.0 wt. %.Type: GrantFiled: April 17, 2002Date of Patent: May 25, 2004Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Joon Hee Kim, Kang Heon Hur, Jong Han Kim, Woo Sup Kim
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Patent number: 6740613Abstract: A dielectric ceramic composition of high dielectric constant and low dielectric loss, which can be co-fired with Ag electrodes, is provided for use in various parts of electric and electronic appliances. The composition is represented by the following chemical formula: a wt. % {xZrO2−yZnO−wNb2O5−zTiO2}+cwt. % glass frit wherein, 5.0 mol %≦x≦45.0 mol %; 1.5 mol %≦y≦19.0 mol %; 1.5 mol %≦w≦19.0 mol %; 40.0 mol %≦z≦59.0 mol % with the proviso that x+y+w+z=100, 75.0≦a≦97.0, and 3.0≦c≦25.0.Type: GrantFiled: April 17, 2002Date of Patent: May 25, 2004Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Woo Sup Kim, Kang Heon Hur, Jong Han Kim, Joon Hee Kim