Patent application number | Description | Published |
20090171617 | METHOD OF DETECTING FREE FALL AND APPARATUS TO DETECT FREE FALL USING THE METHOD - A method of detecting a free fall of a device includes measuring an acceleration of the device, calculating an integral of the acceleration, and determining whether the acceleration is periodic. If the acceleration is not periodic, the integral of the acceleration is compared with a first critical value to determine whether the device falls freely. If the acceleration is periodic, the integral of the acceleration is compared with a second critical value to determine whether the device falls freely. The first and second critical values are different. Since whether the device is periodically accelerated is considered, free fall of the device can be correctly detected, and thus malfunction of the device can be prevented. For example, an unnecessary protection operation for a hard disk drive of the device can be prevented, and thus a user can conveniently use the device. | 07-02-2009 |
20090185305 | METHOD AND SYSTEM FOR SERVO TRACK WRITE - A servo track writing method and a servo track write system of a hard disk drive (HDD) using the servo track write method. The servo track writing method includes performing a reference check (R/C) on a first servo pattern which is pre-written on a first surface of a disk, and if the R/C determines that a quality of the first servo pattern is not good, erasing a specific area of the first servo pattern and writing a second servo pattern on a second surface of the disk. Therefore, process time delay factors of a series of rework processes of writing servo patterns on a disk are removed to shorten a process time of the rework processes. In addition, productivity of a HDD is improved. | 07-23-2009 |
20110181977 | METHOD OF WRITING SERVO PATTERN TO DISK OF A HARD DISK DRIVE AND HARD DISK DRIVE CONFIGURED TO PERFORM THE METHOD - A method of writing a servo pattern of a hard disk drive includes measuring the speed of a head of the hard disk drive by reading a basic servo pattern written to only select ones of the data tracks of the disk, realizing a feedforward current profile when the difference between the actual speed of the head and a target speed of the head is within a predetermined range, and writing a reference servo pattern using the realized feedforward current profile. A final servo pattern is then written using the reference servo pattern. | 07-28-2011 |
20110181983 | METHOD OF CENTERING A DISK OF HARD DISK DRIVE - A method of centering a disk of a hard disk drive includes arranging a disk on an upper end portion of a hub on which a plurality of disks are rotatably assembled, and assembling the disk on the hub by vibrating the hub. Accordingly, the disks and/or spacers may be easily assembled on the hub, a time of centering may be relatively much reduced, and a superior centering quality may be obtained. | 07-28-2011 |
20110188145 | SERVO TRACK WRITER AND OPERATING METHOD - A method of operating a servo track writer includes writing a clock pattern signal to a magnetic recording medium of a head disk assembly, reading the clock pattern signal written to the magnetic recording medium and dividing a frequency of a read clock pattern signal, and supplying a clock pattern signal having a divided frequency to a spindle motor for rotating the magnetic recording medium. | 08-04-2011 |
20130117643 | METHOD AND APPARATUS FOR SCRAPING OF DIGITAL MAGAZINE THAT IS EDITED IN LAYERS - According to one embodiment, a scrapping method of a digital magazine edited in layers is provided. In the method, at least one layer is selected, and content of the selected at least one layer is stored in a scrap book. | 05-09-2013 |
20130185392 | APPARATUS AND METHOD OF TERMINAL FOR MANAGING SERVICE PROVIDED FROM SERVER - An apparatus of a terminal performs an operation method of the terminal using a cloud system. The method includes sending a request for information of a server providing a specific service, to at least one broker. The method also includes receiving the information of the server from the broker, and sending a request for the specific service to the server, using the information of the server. | 07-18-2013 |
Patent application number | Description | Published |
20120075771 | COIN TYPE LITHIUM ION CAPACITOR - Disclosed is a coin type lithium ion capacitor which includes a positive electrode made of an activated carbon based positive active material and a negative electrode opposite to the positive electrode with a first separator interposed therebetween. The negative electrode includes a graphite electrode including a first current collector and a graphite based negative active material coated onto the first current collector; and a lithium metal member opposite to the graphite electrode with a second separator interposed therebetween and including a second current collector and lithium metal coated on the second current collector, in which lithium ions of the lithium metal move from the lithium metal to the positive electrode through the graphite electrode during discharge and are carried in the graphite electrode from the positive electrode during charge. | 03-29-2012 |
20130280603 | METHOD OF MANUFACTURING ANODE ACTIVE MATERIAL, AND ANODE AND LITHIUM BATTERY USING THE ANODE ACTIVE MATERIAL - Disclosed is to a method of manufacturing an anode active material, including mixing a first solution having a metal oxide precursor dissolved therein, a second solution having a polymer as a carbon fiber precursor dissolved therein, and an ionic liquid solution for nitrogen doping and formation of a porous structure, thus preparing an electrospinning solution, electrospinning the electrospinning solution, thus preparing a metal oxide-nitrogen-porous carbon nanofiber composite, and thermally treating the composite, and to an anode and a lithium battery using the anode active material. | 10-24-2013 |
20140134494 | METHOD FOR PREPARING CARBIDE-DERIVED CARBON-BASED ANODE ACTIVE MATERIAL AND ANODE ACTIVE MATERIAL PREPARED BY THE SAME - Disclosed is a method for preparing a carbide-derived carbon-based anode active material. The method includes preparing carbide-derived carbon, and expanding pores of the carbide-derived carbon. Here, expanding of pores is performed as an activation process of heating the prepared carbide-derived carbon in the air. The pores formed inside the carbide-derived carbon can be expanded during the activation process in the preparation of the carbide-derived carbon-based anode active material. In addition, by applying the carbide-derived carbon to an anode active material, lithium secondary battery having improved charge-discharge efficiency can be prepared. | 05-15-2014 |
20140315105 | Cathode for Lithium-Air Battery, Method Of Manufacturing The Same, And Lithium-Air Battery Comprising The Same - This invention relates to a cathode for a lithium-air battery, a method of manufacturing the same and a lithium-air battery including the same. The method of manufacturing the cathode for a lithium-air battery includes 1) stirring a cobalt salt, triethanolamine and distilled water, thus preparing a cobalt solution, 2) electroplating the cobalt solution on a porous support, thus preparing a cobalt plated porous support, 3) reacting the cobalt plated porous support with a mixture solution including oxalic acid, water and ethanol, thus forming cobalt oxalate on the porous support, and 4) thermally treating the cobalt oxalate. | 10-23-2014 |
20150132654 | METHOD OF PREPARING GRAPHENE AND ANODE MIXTURE FOR LITHIUM SECONDARY BATTERY INCLUDING GRAPHENE PREPARED THEREBY - Disclosed herein is a method of preparing porous graphene from porous graphite, including 1) thermochemically reacting a highly crystalline carbide compound with a halogen element-containing gas to give a porous carbide-derived carbon; 2) treating the carbide-derived carbon with an acid, thus preparing a carbide-derived carbon oxide; and 3) reducing the carbide-derived carbon oxide. An anode mixture for a secondary battery including the graphene and an anode for a secondary battery including the anode mixture are also provided. | 05-14-2015 |
20150180074 | MANIFOLD FOR REDOX FLOW BATTERY FOR REDUCING SHUNT CURRENT AND REDOX FLOW BATTERY COMPRISING SAME - A manifold for a redox flow battery capable of effectively suppressing a shunt current has a supply flow pathway and an exhaust flow pathway respectively formed at a left side and a right side of an anode or cathode electrode electrolyte reaction unit so as to include a U-shaped curved portion, and the U-shaped curved portion is formed to be positioned on the upper part of the top or the lower part of the bottom of the first electrode electrolyte reaction unit. When the manifold is applied to a redox flow battery, the supply flow pathway and the exhaust flow pathway having the U-shaped curved portion are formed on the upper part of the top or the lower part of the bottom of the electrode electrolyte reaction unit to prevent an electrolyte existing in the inside of a stack and a pipe from passing through the U-shaped curved portion. | 06-25-2015 |
20150221959 | INTEGRATED COMPLEX ELECTRODE CELL HAVING INNER SEAL STRUCTURE AND REDOX FLOW CELL COMPRISING SAME - A laminated structure of a redox flow cell, an integrated complex electrode cell, and a redox flow cell comprising same, wherein the integrated complex cell can reduce stack lamination process time and lamination cost and increase lamination efficiency by integrating a manifold and a bipolar plate in order to facilitate lamination. The integrated complex electrode cell having an inner seal structure, which inhibits the overflow of electrolytes, is characterized in that it inhibits the overflow of electrolytes of positive and negative poles by forming a structure in which an integrated part of the manifold and the bipolar plate can be sealed. | 08-06-2015 |