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| 20110074309 | FIELD EMISSION DEVICE AND METHOD OF OPERATING THE SAME - Provided are a field emission device enabling rapid pulse operation and a method of operating the same. The field emission device includes a cathode electrode including a field emission source, an anode electrode disposed to face the cathode electrode and accelerating electrons emitted from the field emission source, a current controller controlling field emission current flowing through the cathode electrode, and a field emission controller applying a pull-up voltage to the cathode electrode when the current controller is turned off. | 03-31-2011 |
| 20110148310 | FIELD EMISSION LAMP - Provided is a field emission lamp (FEL), which includes a plurality of cathode electrodes formed above a first substrate, an anode electrode formed under a second substrate to face the cathode electrode, a fluorescent layer composed of red, green and blue (RGB) patterns formed alternately on the anode electrode in an oblique direction, and a plurality of emitters formed on the cathode electrodes to correspond to the RGB patterns. According to the present invention, as an FEL having a fast response time is used as a backlight unit, a color breaking phenomenon can be prevented in a color sequential driving method. | 06-23-2011 |
| 20120148027 | FIELD EMISSION X-RAY TUBE AND METHOD OF OPERATING THE SAME - Provided is a field emission X-ray tube. The field emission X-ray tube includes a cathode electrode provided to one end of a vacuum vessel and including a field emission emitter, an anode electrode provided to the other end of the vacuum vessel in an extending direction of the vacuum vessel, and a gate electrode provided on an outer surface of the vacuum vessel adjacent to the cathode electrode. | 06-14-2012 |
| 20120250827 | FIELD EMISSION X-RAY TUBE APPARATUS FOR FACILITATING CATHODE REPLACEMENT - The present disclosure relates to a field emission X-ray tube apparatus for facilitating cathode replacement, and more particularly, to a field emission X-ray tube apparatus for facilitating cathode replacement in which gates and cathodes are easily arranged through a joining member and a rotation preventing guide when gates and insulating spacers are rotated and joined with the cathodes while the cathodes and respective gates maintain electrical insulation, thereby easily replacing the cathodes. | 10-04-2012 |
| 20120306348 | FIELD EMITTER - Disclosed is a field emitter, including: a cathode electrode in a shape of a tip; an emitter having a diameter smaller than a diameter of the cathode electrode and formed on the cathode electrode; and a gate electrode having a single hole and located above the emitter while maintaining a predetermined distance from the emitter. | 12-06-2012 |
| 20120308716 | MANUFACTURING METHOD OF CNT EMITTER WITH DENSITY CONTROLLED CARBON NANOTUBE - Provided is a manufacturing method of a CNT emitter with density controlled CNT, comprising: (i) fabricating a CNT paste by dispersing a carbon nanotube (CNT) powder, two kinds or more of inorganic fillers which have a lower melting temperature than the CNT and different oxidation degrees of the CNT, and an organic binder in a solvent; (ii) coating the CNT paste on an electrode formed above a substrate; (iii) sintering the substrate coated with the CNT paste to selectively oxidize the CNT around one kind of inorganic filler among two kinds or more of the inorganic fillers; and (iv) treating the surface of the CNT paste so that the surface of the CNT paste is activated. | 12-06-2012 |
| 20130022173 | STACKED X-RAY TUBE APPARATUS USING SPACER - The present disclosure relates to a stacked x-ray tube apparatus using a spacer, and more particularly, to a stacked x-ray tube apparatus using a spacer that makes it possible to reduce the size of an x-ray tube by forming a stacked structure, with electric insulation and predetermined gaps maintained for each electrode, by forming a stacked x-ray tube by inserting insulating spacers (for example, ceramic) between a exhausting port, a cathode, a gate, a focusing electrode, and an anode and bonding them with an adhesive substance, and then inserting a spacer between a field emitter on a cathode substrate and a gate hole connected with a gate electrode. | 01-24-2013 |
| 20130028386 | ELECTRIC FIELD EMISSION X-RAY TUBE APPARATUS EQUIPPED WITH A BUILT-IN GETTER - The present disclosure relates to an electric field emission x-ray tube apparatus equipped with a built-in getter, and more particularly, to an electric field emission x-ray tube apparatus equipped with a built-in getter that makes it possible to reduce the size of an x-ray tube by forming a stacked structure, with electric insulation and predetermined gaps maintained for each electrode, by manufacturing an x-ray tube having a stacked structure by inserting insulating spacers (for example, ceramic) between an exhausting port, a cathode, a gate, a focusing electrode, and an anode and bonding them with an adhesive substance, and then inserting a spacer between a field emitter on a cathode substrate and a gate hole connected with a gate electrode. | 01-31-2013 |
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| 20090146527 | PIEZOELECTRIC MICROSPEAKER USING MICROELECTROMECHANICAL SYSTEMS AND METHOD OF MANUFACTURING THE SAME - A piezoelectric microspeaker using microelectromechanical systems (MEMS) and a method of manufacturing the same are provided. The piezoelectric microspeaker includes a piezoelectric layer disposed on an elastic thin layer, and a resonance change unit patterned on one of a bottom surface of the elastic thin layer and a top surface of the piezoelectric layer. | 06-11-2009 |
| 20090154735 | PIEZOELECTRIC MICROPHONE, SPEAKER, MICROPHONE-SPEAKER INTEGRATED DEVICE AND MANUFACTURING METHOD THEREOF - A piezoelectric microphone, a speaker, a microphone-speaker integrated device and a manufacturing method thereof are provided. The microphone-speaker integrated device includes a silicon substrate and an insulating layer deposited on the silicon substrate; a piezoelectric plate formed on the insulating layer; and a mating electrode formed on the piezoelectric plate. The mating electrode is patterned with a polarity arrayed in series. | 06-18-2009 |
| 20090154736 | APPARATUS FOR GENERATING DIRECTIONAL SOUND AND MOBILE TERMINAL USING THE SAME - Provided are an apparatus for generating directional sound and a mobile terminal using the apparatus. The apparatus includes a signal controller for dividing and generating a reference signal into signals having three or more levels and phases, a first signal processor and a second signal processor for controlling a first signal and a second signal having levels and phases canceling each other among the signals generated from the signal controller, a central signal processor for controlling a signal having the same level and phase as the reference signal among the signals generated from the signal controller, a first speaker array and a second speaker array for converting signals output from the first signal processor and the second signal processor into sound signals and outputting the sound signals, and a central speaker for converting a signal output from the central signal processor into a sound signal and outputting the sound signal, and arranged between the first speaker array and the second speaker array. | 06-18-2009 |
| 20100158281 | MICRO-ELECTROMECHANICAL SYSTEMS (MEMS) MICROPHONE AND METHOD OF MANUFACTURING THE SAME - Provided are a micro-electromechanical systems (MEMS) microphone and a method of manufacturing the same. A manufacturing process is simplified compared to a conventional art using both upper and lower substrate processes. Since defects which may occur during manufacturing are reduced due to the simplified manufacturing process, the manufacturing throughput is improved, and since durability of the MEMS microphone is improved, system stability against the external environment is improved. | 06-24-2010 |
| 20110062912 | ENERGY AND POWER MANAGEMENT INTEGRATED CIRCUIT DEVICE - Provided is an energy and power management integrated circuit (IC) device. The energy and power management IC device includes a plurality of energy conversion devices for harvesting energy from respective energy conversion sources and converting the energy into electric energy, an energy management IC (EMIC) for converting the electric energy converted by the energy conversion devices into stable energy, a storage device for storing the energy or power converted by the EMIC, a power management IC (PMIC) for receiving and distributing the power stored in the storage device, and a plurality of output load devices for consuming the power distributed by the PMIC. Accordingly, it is possible to harvest energy in an environmentally friendly way and semi-permanently use the energy without changing a battery. | 03-17-2011 |
| 20110138882 | SEMICONDUCTOR GAS SENSOR HAVING LOW POWER CONSUMPTION - Provided are a structure and operating method of a semiconductor gas sensor having low power consumption. The semiconductor gas sensor is adapted to adsorb gas to a low-dimensional semiconductor nanomaterial at room temperature, output a change in resistance of the low-dimensional semiconductor nanomaterial, apply power to a heater, desorb the gas adsorbed to the low-dimensional semiconductor nanomaterial, and return the resistance of the low-dimensional semiconductor nanomaterial back to initial resistance. The semiconductor gas sensor senses the gas at room temperature using the low-dimensional semiconductor nanomaterial having a high-sensitivity characteristic at room temperature, and drives the heater only when the adsorbed gas is desorbed. Thereby, it is possible to improve a gas sensing characteristic, reduce power consumption, and provide a rapid response speed. | 06-16-2011 |
| 20110140680 | APPARATUS AND METHOD FOR EXTRACTING MAXIMUM POWER FROM SOLAR CELL - An apparatus and method for extracting maximum power from a solar cell are provided. The apparatus includes a solar cell for producing power from solar energy, a maximum power extractor for generating a pulse width modulation signal for extracting the maximum power from the solar cell, and a DC-DC converter for adjusting an amount of current generated from the solar cell according to the pulse width modulation signal. | 06-16-2011 |
| 20110141854 | ACOUSTIC SENSOR AND METHOD OF FABRICATING THE SAME - A condenser-type acoustic sensor is provided. The acoustic sensor includes an acoustic chamber formed by etching an upper portion of a substrate, an insulating layer formed on the substrate and having a central area etched so that the acoustic chamber is exposed, a diaphragm formed on the insulating layer, and a stationary electrode formed on the diaphragm. Thus, a nonlinear component resulting from horizontal movement of the support and the diaphragm is removed to improve a sound-pressure response characteristic, and a substrate backside process can be omitted to simplify a fabrication process and improve a yield. | 06-16-2011 |
| 20110150036 | FLEXIBLE THERMOELECTRIC GENERATOR, WIRELESS SENSOR NODE INCLUDING THE SAME AND METHOD OF MANUFACTURING THE SAME - Provided are a flexible thermoelectric generator, a wireless sensor node including the same and a method of manufacturing the same. The flexible thermoelectric generator includes a plurality of P-type semiconductors and a plurality of N-type semiconductors, which are alternately arranged, an upper metal for connecting upper surfaces of the adjacent P-type semiconductor and N-type semiconductor, a lower metal for connecting lower surfaces of the adjacent P-type semiconductor and N-type semiconductor, and alternately disposed with respect to the upper metal, a P-type metal connected to at least one P-type semiconductor among the plurality of P-type semiconductors, and an N-type metal connected to at least one N-type semiconductor among the plurality of N-type semiconductors. | 06-23-2011 |
| 20120187077 | MICRO-ELECTROMECHANICAL SYSTEMS (MEMS) MICROPHONE AND METHOD OF MANUFACTURING THE SAME - Provided are a micro-electromechanical systems (MEMS) microphone and a method of manufacturing the same. A manufacturing process is simplified compared to a conventional art using both upper and lower substrate processes. Since defects which may occur during manufacturing are reduced due to the simplified manufacturing process, the manufacturing throughput is improved, and since durability of the MEMS microphone is improved, system stability against the external environment is improved. | 07-26-2012 |
| 20120198918 | MICROELECTROMECHANICAL SYSTEMS TYPE SEMICONDUCTOR GAS SENSOR USING MICROHEATER HAVING MANY HOLES AND METHOD FOR MANUFACTURING THE SAME - Disclosed are an MEMS type semiconductor gas sensor using a microheater having many holes and a method for manufacturing the same. The MEMS type semiconductor gas sensor includes: a substrate of which a central region is etched with a predetermined thickness; a second membrane formed at an upper portion of the central region of the substrate and having many holes; a heat emitting resistor formed on the second membrane and having many holes; a first membrane formed on the second membrane including the heat emitting resistor and having many holes; a sensing electrode formed on the first membrane and having many holes; and a sensing material formed on the sensing electrode. | 08-09-2012 |
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| 20090150997 | APPARATUS AND METHOD FOR DETECTING MALICIOUS FILE IN MOBILE TERMINAL - Provided is an apparatus and method for detecting a malicious file that attempts to initiate communication in a mobile terminal without a user's approval. The method of detecting a malicious file in a mobile terminal includes: determining whether a file to be examined is an executable file; when the file is an executable file, examining whether the file is a malicious file that can cause unapproved communication based on at least one predetermined examination condition; and outputting the result of examining whether the file is the malicious file. Accordingly, an attack caused by a new type of malicious code can be coped with. | 06-11-2009 |
| 20120106575 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - Disclosed is an apparatus and method for transmitting/receiving data using a low-density parity check (LDPC) coding scheme in a communication system. The method includes generating a multi-user data packet containing data to be transmitted to a plurality of users, encoding the multi-user data packet as a BCC and an LDPC code, and transmitting the encoded multi-user data packet to the plurality of users. In the method, the encoding of the multi-user data packet encodes MPDU subframes corresponding to each of the plurality of users in the multi-user data packet as the LDPC code, and calculates information on a length in LDPC encoding, corresponding to the encoding of the multi-user data packet as the LDPC code. | 05-03-2012 |
| 20120163440 | APPARATUS AND METHOD FOR TUNABLE WIDEBAND SOLAR RADIO NOISE MEASUREMENT - An apparatus and method for tunable wideband solar radio noise measurement is provided. Accordingly, it is possible to directly measure the absolute flux of solar radio waves in a desired frequency band using a tunable receiver, and accordingly, to protect radio communication broadcasting systems located on the earth from its damage caused due to radio burst, noise and the like. | 06-28-2012 |
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| 20080309453 | APPARATUS AND METHOD FOR STARTING AUTOMOBILE ENGINE - Provided are an apparatus and a method for starting automobile engine by a radio communication between an automobile smart key and a smart key electronic control unit (ECU). According to this invention, it is decided whether or not a transmission lever position signal and a break pedal signal are ON. The smart key ECU requests a smart key for a smart key ID when both signals are ON, and receives the smart key ID from the smart key. Then the smart key ECU performs the verification of the smart key using the received smart key ID and turns the starting control relay ON when the smart key is verified. Additionally, when the ignition switch is turned ON within the prescribed time after the starting control relay is turned ON, the smart key ECU supplies the electric power from the ignition switch to the starting motor, thus starting the automobile engine. | 12-18-2008 |
| 20090031767 | STRUCTURE OF AUTOMOBILE ELECTRONIC KEY FOR SECURITY AND METHOD FOR PERFORMING FUNCTION THEREOF - Provided are a structure of an automobile electronic key for security and a method for performing the function thereof. It is determined whether at least one of a driver seat door closing signal and a brake pedal signal is on. A key fob of an automobile is requested to send the ID thereof, and the ID is received from the key fob when at least one of the driver seat door closing signal and the brake pedal signal is on. The key fob is authenticated using the received ID. An actuator is driven to move a locking member such that a car key is switched to a rotatable state when the key fob passes authentication. The actuator is driven to move the locking member such that the car key is switched to an unrotatable state when the key fob does not pass authentication. | 02-05-2009 |
| 20090033150 | APPARATUS AND METHOD FOR STARTING ENGINE OF AUTOMOBILE USING START-BUTTON - Provided are an apparatus and a method for starting an engine of an automobile using a start-button without a normal car key. In the apparatus and method, it is determined whether plural signals including the start-button are on. A key FOB is requested to transmit its ID, the ID is received from the key FOB, and authentication is performed on the key FOB using the received ID when the signals are on. Power is provided to a starting motor and a driving signal is applied to a motor driver to drive a motor when the key FOB passes authentication. A shaft is driven according to the operation of the motor to operate a steering column and the starting motor is driven to start the engine. A safety member is inserted into a first hole of the shaft to block the shaft from moving and rotating when the engine is started. | 02-05-2009 |
| 20090261945 | PASSIVE ENTRY SYSTEM AND METHOD FOR PERFORMING FUNCTION THEREOF - Provided are a passive entry system for changing a scan method to reduce battery consumption of a smart key and a method for performing a function thereof. In the passive entry system, a smart key ECU periodically transmits a low-frequency scan signal for detecting the smart key. When the smart key being in a slip state is located within a receiving radius of the scan signal, the smart key receives the scan signal and is converted into an active state. Battery consumption of the smart key can be reduced because the smart key normally being in the slip state is converted into the active state when receiving the scan signal from the smart key ECU. Furthermore, the smart key is converted into the active state only within the low-frequency scan signal receiving radius formed near an automobile and requests the smart key ECU to perform a function of the automobile, for example, a function of closing/opening doors. Accordingly, a reliable passive entry system can be achieved. | 10-22-2009 |
| 20110208413 | APPARATUS AND METHOD FOR STARTING AUTOMOBILE USING START-BUTTON - Provided are an apparatus and a method for starting an engine of an automobile using a start-button without a normal car key. In the apparatus and method, it is determined whether plural signals are on when the start-button is on. A key FOB is requested to transmit an ID, receive the ID from the key FOB, and perform authentication on the key FOB using the received ID when the signals are on. Power is provided to a starting motor of the automobile and a driving signal is applied to a motor driver for driving a motor positioned within a key cylinder of the apparatus for starting the automobile when the key FOB passes authentication. A shaft is driven according to the operation of the motor to operate the starting motor to start the automobile. | 08-25-2011 |
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| 20080200592 | Plasticizer composition containing cyclodextrin derivatives, flexible PVC composition with suppression of the migration of plasticizer containing the same, and manufacturing method thereof - The present invention relates to a plasticizer composition containing cyclodextrin derivatives, a flexible PVC composition with suppression of the migration of plasticizer containing this plasticizer composition, and a manufacturing method of the PVC composition. The manufacturing method includes the steps of: (S1) preparing a cyclodextrin derivative, in which hydrogens of a cyclodextrin are substituted with a certain compound; (S2) mixing the cyclodextrin derivative, PVC and a low molecular weight liquid plasticizer to form a plastisol; and (S3) heating the plastisol into liquid and cooling the plastisol. This manufacturing method uses cyclodextrin derivatives, in which cyclodextrins are modified with certain compounds, and these derivatives form a complex with the low molecular weight liquid plasticizer to suppress plasticizer migration. Thus, this method thereby allows mass-production of the flexible PVC with suppressed plasticizer migration in a simple and economical manner without using a solvent. | 08-21-2008 |
| 20100092376 | Manufacturing method of porous titanium dioxide using cyclodextrin - A method is provided for manufacturing porous titanium dioxide with uniform pore sizes within several nanometers by means of a template and a titanium precursor. In this method, a cyclodextrin or cyclodextrin derivative is used as a template for forming pores, and the cyclodextrin or then derivative reacts with the titanium precursor in a sulfuric acid solution. The manufacturing method according to the present invention allows the control of pore size and morphology using various kinds of cyclodextrin or cyclodextrin derivatives, supports a facile removal of the cyclodextrin used as the template, and is capable of manufacturing anatase type porous titanium dioxide with excellent photoactivity without a separate sintering process. | 04-15-2010 |
