Eu
David Eu, Fremont, CA US
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20150153563 | WAVELENGTH TUNABLE MEMS-FABRY PEROT FILTER - A wavelength tunable gain medium with the use of micro-electromechanical system (MEMS) based Fabry-Perot (FP) filter cavity tuning is provided as a tunable laser. The system comprises a laser cavity and a filter cavity for wavelength selection. The laser cavity consists of a gain medium such as a Semiconductor Optical Amplifier (SOA), two collimating lenses and an end reflector. The MEMS-FP filter cavity comprises a fixed reflector and a moveable reflector, controllable by electrostatic force. By moving the MEMS reflector, the wavelength can be tuned by changing the FP filter cavity length. The MEMS FP filter cavity displacement can be tuned discretely with a step voltage, or continuously by using a continuous driving voltage. The driving frequency for continuous tuning can be a resonance frequency or any other frequency of the MEMS structure, and the tuning range can cover different tuning ranges such as 30 nm, 40 nm, and more than 100 nm. | 06-04-2015 |
20160056613 | WAVELENGTH-TUNABLE VERTICAL CAVITY SURFACE EMITTING LASER FOR SWEPT SOURCE OPTICAL COHERENCE TOMOGRAPHY SYSTEM - A wavelength-tunable vertical-cavity surface-emitting laser (VCSEL) with the use of microelectromechanical system (MEMS) technology is provided as a swept source for Optical Coherence Tomography (OCT). The wavelength-tunable VCSEL comprises a bottom mirror of the VCSEL, an active region, and a MEMS tunable upper mirror movable by electrostatic deflections. The bottom mirror comprising a GaAs based distributed Bragg reflector (DBR) stack, and the active region comprising multiple stacks of GaAs based quantum dot (QD) layers, are epitaxially grown on a GaAs substrate. The MEMS tunable upper mirror includes a membrane part supported by suspension beams, and an upper mirror comprising a dielectric DBR stack. The MEMS tunable quantum dots VCSEL can cover an operating wavelength range of more than 100 nm, preferably with a center wavelength between 250 and 1950 nm, and the sweeping rate can be from a few kHz to hundreds of kHz, and up to a few MHz. | 02-25-2016 |
Jai Hong Eu, Seoul KR
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20110010025 | MONITORING SYSTEM USING UNMANNED AIR VEHICLE WITH WIMAX COMMUNICATION - Provided is a monitoring system using an unmanned air vehicle communicated based on a WiMAX communication scheme. The monitoring system includes an air vehicle and a relay unit. The air vehicle includes a photographing unit for capturing on-scene image information of a current flying area, and a global positioning system (GPS) receiver for receiving GPS information of the current flying area. The air vehicle transmits the on-scene image information and the GPS information, wirelessly. The relay unit remotely controls the air vehicle by receiving a travel command signal having information on a destination of the air vehicle, wirelessly transmits the travel command signal to the air vehicle based on the WiMAX communication scheme, and wirelessly receives the on-scene image information and the GPS information from the air vehicle based on the WiMAX communication scheme. | 01-13-2011 |
20110110313 | DYNAMIC BANDWIDTH ALLOCATION SYSTEM OF WIBRO/WIMAX COMMUNICATION - Provided is a WiBro/WiMAX dynamic bandwidth allocation system. The dynamic bandwidth allocation system according to the present invention enables instant band change and allocation in variable channel environment by disposing a plurality of BPFs each having a different pass band and selectively using the BPFs in order to dynamically allocate bands according to an occupancy state of a current channel detected around a system. Therefore, the transmission quality can be improved. | 05-12-2011 |
Jake Eu, Seoul KR
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20160118088 | STORAGE DEVICE INCLUDING A PLURALITY OF NONVOLATILE MEMORY CHIPS - A storage device includes first and second nonvolatile memory groups that respectively include first and second nonvolatile memory chips, a memory controller connected to the first and second nonvolatile memory groups in common through input/output lines and at least one control line, and a group select circuit connected to the memory controller through the at least one control line and chip enable lines. The group select circuit is connected to the first and second nonvolatile memory groups through a plurality of first and second chip enable lines, respectively. The group select circuit, in response to receiving a control signal through the at least one control line, is configured to transmit chip enable signals to a selected memory group among the first nonvolatile memory group and the second nonvolatile memory group through selected chip enable lines among the first chip enable lines and the second chip enable lines. | 04-28-2016 |
Jung-Tack Eu, Paju-Si KR
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20090201439 | LIQUID CRYSTAL DISPLAY DEVICE - Disclosed is a liquid crystal display device equipped with a balance insulating member having a bottom frame and lamp sockets integrally formed on the bottom frame, including: a lower cover; a plurality of lamps disposed on the lower cover with a certain interval therebetween; a balance insulating member disposed at both sides of the lower cover, and having a bottom frame and lamp sockets integrally formed on the bottom frame so as to be coupled to the lamps; and a liquid crystal panel disposed above the lamps and receiving light, wherein the balance insulating member includes conductive electrodes formed at the lamp sockets, ballast capacitors each connected to the conductive electrodes and disposed on an upper side of the bottom frame, and conductive wirings formed inside the bottom frame and connected to the ballast capacitors. | 08-13-2009 |
Mingda Eu, Oak Park, CA US
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20110060290 | STABILIZED PROTEIN COMPOSITIONS - Stabilized compositions of specific binding agents to RANKL, specific binding agents to TNF, and/or specific binding agents to IL-1R1 in containers are provided. Methods of making and using such compositions are also provided. | 03-10-2011 |
Seunghun Eu, Chiyoda-Ku JP
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20140000716 | POLYMER AND PHOTOELECTRIC CONVERSION ELEMENT | 01-02-2014 |
20140114078 | ORGANIC SEMICONDUCTOR - An organic semiconductor represented by the following formula (1). | 04-24-2014 |
Seung-Hun Eu, Daejeon-City KR
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20080213506 | CATALYST PRECURSOR COMPOSITION FOR ELECTROLESS PLATING, AND PREPARATION METHOD OF TRANSPARENT ELECTROMAGNETIC INTERFERENCE SHIELDING MATERIAL USING THE SAME - The present invention relates to a catalyst precursor composition for electroless plating, and more specifically, the present invention provides the catalyst precursor composition comprising (a) a reactive oligomer; (b) a reactive monomer; (c) a photoinitiator; (d) a catalyst precursor for electroless plating; and (e) a solvent, and a method of preparing the EMI shielding material with the same. The present invention provides an easy and simple method of preparing the EMI shielding material by using the catalyst precursor composition that contains a UV curable resin with good adhesion to the base material, thereby eliminating the need for pre-treating the base material with a receptive layer before electroless plating. | 09-04-2008 |
Young Jae Eu, Daejeon KR
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20100056456 | Omega Conotoxins - The present invention relates to a method for increasing the binding reversibility of a ω-conotoxin to a N-type calcium channel, which comprises preparing a ω-conotoxin having a Ile and/or Ala residue at a position of amino acid (11 and/or 12), respectively in the second loop between cysteine residues (2 and 3) of the ω-conotoxin represented by the formula I, such that the prepared ω-conotoxin has the increased binding reversibility to N-type calcium channel. In addition, the present invention relates to a novel ω-conotoxin and a pharmaceutical composition having plausible properties in view of blocking activity to and specificity to N-type calcium channel, and dramatically improved binding reversibility to N-type calcium channel. | 03-04-2010 |
20130285648 | MICROFLUIDIC CHIP FOR SUSCEPTIBILITY OF SUPERPARAMAGNETIC NANOPARTICLES OF BEAD AND DROPLET TYPES AND MEASURING METHOD FOR SUSCEPTIBILITY USING THE SAME - The present invention relates to a microfluidic chip for measuring the magnetic susceptibility of a superparamagnetic nanoparticle droplet and a method for measuring magnetic susceptibility using the same. According to the invention, the magnetic susceptibility of a superparamagnetic nanoparticle can be continuously and accurately measured in a flowing fluid using a microfluidic chip including microfluidic channels. | 10-31-2013 |