Patents by Inventor Sung Chang
Sung Chang 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: 20080107810Abstract: In a method for effectively depositing an anti-corrosion and anti-oxidation material, such as silicon dioxide, on high-temperature components of a gas turbine, including blades rotating at a high speed during the operation of the gas turbine, an organic compound including a metal ingredient, such as silicon, is added to a fuel for the gas turbine, such as LNG, diesel or kerosene, or the organic compound is sprayed into combustion air so that the organic compound can burn together with the fuel, in order to improve the durability of the high-temperature components. Silicon dioxide, produced by burning a silicon organic compound together with the fuel, is uniformly deposited on all the high-temperature components of the gas turbine, which are exposed to the combustion gas of a high temperature, thus forming an anti-corrosion and anti-oxidation coating layer of a thickness of several to several tens of ?m on the high-temperature components during the operation of the gas turbine.Type: ApplicationFiled: August 9, 2007Publication date: May 8, 2008Inventors: Min KIM, Sung Chang, Jong Won
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Publication number: 20070150754Abstract: A postal security device (PSD) includes a microprocessor including an internal random access memory (RAM) and an internal flash memory in which is stored at least one secure datum, and at least one external memory coupled to the microprocessor in which is stored at least one non-secure datum and not one of the at least one secure datum.Type: ApplicationFiled: December 22, 2005Publication date: June 28, 2007Inventors: Steven Pauly, Robert Arsenault, Gary Jacobson, George Monroe, Walter Baker, Wesley Kirschner, Robert Sisson, Sung Chang, Elaine Cristiani
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Publication number: 20070072060Abstract: Disclosed is an apparatus for protecting a secondary battery, in which, when the secondary battery such as a lithium-ion secondary battery is exposed to high temperature exceeding a working range due to a change in external environment, external impacts, and so on, or heated due to spontaneous generation of heat caused by internal defects, the secondary battery is discharged. The apparatus includes a thyristor or transistor having an anode and a cathode connected both terminals of the secondary battery respectively, and shorting both terminals of the secondary battery when gate current is supplied, and a temperature sensor detecting temperature of the secondary battery and supplying the gate current to the thyristor or transistor when the detected temperature is higher than predetermined temperature.Type: ApplicationFiled: July 20, 2006Publication date: March 29, 2007Inventors: Sung Chang, Joon Lee, Jae Lee, Soo Ha, Jeong Cho, Sang Choy
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Publication number: 20070042269Abstract: Disclosed is a method for preparing an electrochemical device, comprising the steps of: charging an electrochemical device using an electrode active material having a gas generation plateau potential in a charging period to an extent exceeding the plateau potential; and degassing the electrochemical device. An electrochemical device, which comprises an electrode active material having a gas generation plateau potential in a charging period, and is charged to an extent exceeding the plateau potential and then degassed, is also disclosed. Some electrode active materials provide high capacity but cannot be applied to a high-capacity battery due to the gas generation. This is because a battery using such electrode active materials should be charged to an extent exceeding the gas generation plateau potential in order to realize a high capacity. To solve the problems caused by the gas generation, the battery is charged to an extent exceeding the plateau potential, and then degassed.Type: ApplicationFiled: August 18, 2006Publication date: February 22, 2007Inventors: Sung Chang, Eui Bang, Min Jang, Sang Choy, Ki Lee
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Publication number: 20070037043Abstract: Disclosed is a pretreatment method for activating an electrode active material having a certain range of potential plateau beyond a redox potential range of a transition metal forming the electrode active material, which comprises charging the electrode active material to an extent exceeding the potential plateau at least once, so as to increase capacity of the electrode active material. Also, disclosed is an electrochemical device comprising the electrode active material activated by the pretreatment method and designed to be subjected to charge/discharge cycles at a voltage lower than the potential plateau. When the electrode active material pretreated by charging it to an extent exceeding the potential plateau is subjected to charge/discharge cycles at a lower voltage, it is possible to significantly increase the capacity of the electrode active material as compared to the capacity of the non-pretreated electrode active material charged/discharged at the same voltage.Type: ApplicationFiled: July 21, 2006Publication date: February 15, 2007Inventors: Sung Chang, Eui Bang, Min Jang, Sang Choy, Ki Lee
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Publication number: 20070002193Abstract: A liquid crystal display (LCD) device includes a first substrate, gate lines formed on the first substrate, data lines perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels, thin film transistors (TFTs) disposed at each intersection where the gate lines cross the data lines, common lines disposed in parallel with the gate lines, the common lines including a common line capacitance (Cdc) control portion, pixel electrodes insulated from the common lines and connected to the TFTs, a second substrate opposite to the first substrate and bonded to the first substrate, and a liquid crystal layer disposed between the first and second substrates.Type: ApplicationFiled: December 13, 2005Publication date: January 4, 2007Inventors: Woo Kim, Eui Kim, Sung Chang
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Publication number: 20060275653Abstract: Disclosed is a protection circuit for a secondary battery and a secondary battery having the same, which can interrupt electric current input into the secondary battery when the temperature of the secondary battery increases due to an overcharge, and also can protect the secondary battery in the case where the already charged secondary battery is exposed to a high temperature due to the increase of an external or internal temperature of the secondary battery. The protection circuit includes: means having one end connected to a first electrode of the secondary battery, for restricting electric current; switching means for connecting a second electrode of the secondary battery to a first outer electrode, or to the current restriction means in response to temperature; and a conducting wire for connecting the first electrode of the secondary battery to a second outer electrode.Type: ApplicationFiled: May 10, 2006Publication date: December 7, 2006Inventors: Sung Chang, Jae Lee, Joon Lee, Soo Ha, Jeong Cho
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Publication number: 20060267914Abstract: Provided is an LCD capable of compensating for a resistance variation in a link unit. The resistance variations in the gate lines, data lines and common lines are reduced to minimize the signal distortion in the LCD. Accordingly, it is possible to enhance the image quality characteristics of the LCD. The resistance variation can be reduced by adjusting the number or the size of contact holes in the link unit.Type: ApplicationFiled: May 30, 2006Publication date: November 30, 2006Inventors: Sung Chang, Hyung Shin, Sang Park
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Publication number: 20060204845Abstract: Provided is a lithium secondary battery having improved discharge characteristics in a range of high-rate discharge while minimizing a dead volume and at the same time, having increased cell capacity via increased electrode density and electrode loading amounts, by inclusion of two or more active materials having different redox levels so as to exert superior discharge characteristics in the range of high-rate discharge via sequential action of cathode active materials in a discharge process, and preferably having different particle diameters.Type: ApplicationFiled: February 22, 2006Publication date: September 14, 2006Inventors: Sung Chang, Seo-Jae Lee, Sanghoon Choy, Euiyong Bang, Minchul Jang, Ki-Young Lee
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Publication number: 20060197506Abstract: The present invention relates to an apparatus for protecting a secondary battery by preventing overcharge of the secondary battery. The apparatus for protecting a secondary battery includes: a secondary battery; a power supply, connected with both electrode terminals of the secondary battery, for providing a charging voltage and a charging current to the secondary battery to charge the secondary battery; and a secondary battery protection unit for shorting the power supply thereby to stop charging the secondary battery if a charging voltage of the secondary battery is above a predetermined voltage.Type: ApplicationFiled: February 24, 2006Publication date: September 7, 2006Inventors: Sung Chang, Jae Lee, Joon Lee, Soo Ha, Sang Choy, Jeong Cho
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Publication number: 20060188418Abstract: A multi-functional child care storage for storing and treating infant care products includes a plurality of functional compartments provided in a main body and having individual spaces divided by a partition member. The functional compartments includes a refrigerating compartment for storing the infant care products at a reduced temperature, a refrigerating and heating compartment for storing, cooling and heating the infant care products, a warming-in-water compartment for warming up the infant care products and a sterilizing compartment for sterilizing the sterilizing and drying. A control unit controls the functional compartments so that each of the functional compartments is maintained at a predetermined temperature.Type: ApplicationFiled: February 22, 2006Publication date: August 24, 2006Applicant: Daewoo Electronics CorporationInventors: Yoon Park, Sung Chang
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Publication number: 20060139543Abstract: A liquid crystal display device includes a gate line formed on a substrate; first and second data lines crossing the gate line to form adjacent pixel regions in a direction of the gate line; pixel electrodes and common electrodes substantially parallel to each other and generating an in-plane electric field; a first pixel electrode line parallel to the first data line and spaced apart from the first data line by a first isolation distance; a second pixel electrode line spaced apart from the second data line by a second isolation distance; and a first common line parallel to the first data line and spaced apart from the first data line by a third isolation distance; a second common line spaced from the second data line by a fourth isolation distance, wherein the first isolation distance is shorter than the third isolation distance, and a parasitic capacitance between the first pixel electrode line and the first data line is greater than a parasitic capacitance between the second pixel electrode line and the seType: ApplicationFiled: June 27, 2005Publication date: June 29, 2006Applicant: LG.PHILIPS LCD CO., LTD.Inventors: Do Kim, Byung Kang, Do Lee, Sung Chang
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Publication number: 20060083983Abstract: Disclosed is a secondary battery. The secondary battery includes a battery can serving as a positive electrode terminal or a negative electrode terminal of the secondary battery, an electrically conductive substrate provided at an outer portion of the battery can, and a nonconductive film interposed between the battery can and the electrically conductive substrate in order to insulate the electrically conductive substrate from the battery can, wherein the electrically conductive substrate is electrically connected to an electrode terminal having polarity opposite to that of the battery can. Safety of the secondary battery is ensured even if the secondary battery is subject to external parameters, such as penetration of a sharp tool (e.g. a nail or a drill tip), pressing force of a tool (e.g. a nipper), external impact, and exposure to the high temperature.Type: ApplicationFiled: October 10, 2005Publication date: April 20, 2006Inventors: Sung Chang, Jae Lee, Joon Lee, Soo Ha, Jeong Cho
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Publication number: 20060051660Abstract: Disclosed are a safety device and a secondary battery using the same. The safety device includes a voltage sensitive heating device generating heat when a voltage difference between both ends thereof exceeds a predetermined voltage level and a temperature sensitive device having a reversible current ON/OFF function according to a temperature. The temperature sensitive device is coupled with the voltage sensitive heating device such that the temperature sensitive device detects the heat generated from the voltage sensitive heating device.Type: ApplicationFiled: September 7, 2005Publication date: March 9, 2006Inventors: Sung Chang, Jae Lee, Joon Lee, Soo Ha, Jeong Cho
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Publication number: 20060043935Abstract: An object of the present invention is to provide the device for protecting a secondary battery safely from overvoltage and overheating caused by the overcharge by using simple safety device, which provides a contacted safety device which connects between a constant voltage element showing a discharge characteristic in the state of overvoltage and a MIT (metal insulator transition) element showing a discharge characteristic in the state of overheating. Each of the constant voltage element and the MIT element are connected in parallel between a cathode lead and an anode lead of the secondary battery.Type: ApplicationFiled: August 23, 2005Publication date: March 2, 2006Inventors: Sung Chang, Jae Lee, Joon Lee, Soo Ha, Jeong Cho
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Publication number: 20060038534Abstract: Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown voltage of the constant-voltage device is lower than the explosion or ignition voltage of the secondary battery, so the discharge operation may occur before the secondary battery is exploded or ignited even if the voltage of the secondary battery rises above the overcharge voltage, thereby protecting the secondary battery from explosion or ignition. The leakage current value of the constant-voltage device is less than 0.05% of the capacity value of the secondary battery under the maximum charge voltage of the secondary battery, or the breakdown voltage of the constant-voltage device is higher than the maximum charge voltage of the secondary battery. Thus, the constant-voltage device rarely generates the leakage current even if the secondary battery has been charged with the maximum charge voltage.Type: ApplicationFiled: August 19, 2005Publication date: February 23, 2006Inventors: Sung Chang, Jeong Cho, Jae Lee, Joon Lee, Eui Bang, Soo Ha
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Publication number: 20060035560Abstract: The present invention relates to a plasma display panel that is adaptive for preventing color mixture between adjacent cells. A plasma display panel according to an embodiment of the present invention includes a plurality of discharge cells; barrier ribs to partition off the discharge cells; and a phosphor layer formed on the bottom surface of the discharge cells and the side surface of the barrier ribs, wherein if the thickness of the phosphor layer formed on the side surface of the barrier ribs is D1 and the thickness of the phosphor layer formed on the bottom surface of the discharge cell is D2, the value of D1/D2 ranges from 0.8 to 1.3.Type: ApplicationFiled: August 15, 2005Publication date: February 16, 2006Inventor: Sung Chang
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Publication number: 20060019699Abstract: A method of uploading a web blog in a mobile communication terminal and system thereof are disclosed, in which the web blog is composed and stored by off-line using the mobile communication terminal, in which the web blog is transmitted via a wireless connection to a computer, and by which the user's web blog can be uploaded to a web blog site. By selecting the upload of the web blog automatically or manually and by notifying a presence or non-presence of the upload completion to the user, the present invention facilitates the web blog to be uploaded within wireless Internet access, thereby enhancing convenience of using the mobile communication terminal.Type: ApplicationFiled: July 7, 2005Publication date: January 26, 2006Inventors: Sung Chang, Sung Kim
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Publication number: 20060014079Abstract: Disclosed is a compound represented by the following formula 1. A lithium secondary battery using the same compound as electrode active material, preferably as cathode active material, is also disclosed. LiMP1-xAxO4??[Formula 1] wherein M is a transition metal, A is an element having an oxidation number of +4 or less and 0<x<1. The electrode active material comprising a compound represented by the formula of LiMP1-xAxO4 shows excellent conductivity and charge/discharge capacity compared to LiMPO4.Type: ApplicationFiled: July 14, 2005Publication date: January 19, 2006Inventors: Sung Chang, Jeong Cho
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Publication number: 20050287440Abstract: Disclosed is an anode active material, comprising: (a) a carbonaceous material; and (b) a carbide coating layer partially or totally formed on a surface of the carbonaceous material, the carbide coating layer comprising at least one element selected from the group consisting of metals and metalloids. An anode obtained by using the anode active material and an electrochemical device comprising the anode are also disclosed. The carbonaceous material comprises a coating layer of metal-/metalloid-carbide obtained by treating it at high temperature under inert atmosphere, wherein the coating layer has increased interfacial boding force to the carbonaceous material and thus shows minimized reactivity to lithium. The carbonaceous material as anode active material can minimize the irreversible anode capacity needed for the formation of an SEI film during the first charge/discharge cycle, thereby providing high capacity, high efficiency and significantly improved anode qualities.Type: ApplicationFiled: April 22, 2005Publication date: December 29, 2005Inventors: Sung Chang, Hyeong Kim, Sang Choy, Jeong Cho