Chulki
Chulki Jang, Icheon-City KR
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20100102843 | SEMICONDUCTOR TEST HEAD APPARATUS USING FIELD PROGRAMMABLE GATE ARRAY - A semiconductor test head apparatus using a field programmable gate array (FPGA) is disclosed. A semiconductor test head apparatus using a field programmable gate array, includes a pattern generator for generating a predetermined memory test pattern, a driver/comparator unit comprising a first transceiver which performs a driver function capable of recording a memory test pattern generated from the pattern generator in a device under test and a comparator function capable of comparing a level of a signal read by the device under test with a predetermined high-level reference value, and a second transceiver which performs the driver function and a comparator function capable of comparing a level of a signal read by the device under test with a predetermined low-level reference value, and a connection unit for electrically connecting the first transceiver in parallel to the second transceiver, and connecting the first transceiver and the second transceiver to the device under test. | 04-29-2010 |
Chulki Kim, Samcheok-Si KR
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20140121530 | APPARATUS AND METHOD FOR MEASURING GANGLION CELLS - An apparatus for measuring ganglion cells may include: a light generation unit configured to irradiate a first light signal polarized in a first direction and a second light signal polarized in a second direction perpendicular to the first direction to a subject; a reflected light processing unit configured to generate an amplification signal corresponding to an image of the subject using a first reflection signal, which is the first light signal reflected from the subject, and a second reflection signal, which is the second light signal reflected from the subject; and an image processing unit configured to measure ganglion cells in the subject using the amplification signal. The apparatus may be used to count the number of normal ganglion cells in the retina by measuring a phase difference of two lights polarized in different directions. The apparatus may also be used to monitor the progress of glaucoma. | 05-01-2014 |
20140340678 | PHOTORECEPTOR PROTEIN-BASED SPECTROPHOTOMETER, METHOD FOR MANUFACTURING THE SAME AND METHOD FOR LIGHT DETECTION USING THE SAME - A photoreceptor protein-based spectrophotometer may include a field-effect transistor and a photoreceptor protein on the field-effect transistor (FET), the photoreceptor protein exhibiting change in electrical properties by absorbing light and being activated. Since the spectrophotometer can convert the light absorbed by the photoreceptor protein to an electrical signal using the FET, it can mimic human vision by using human photoreceptor proteins. The spectrophotometer can measure the color, intensity, etc. of light of broad wavelength ranges as in human vision. Thus, the spectrophotometer can be applied to the development of artificial vision, etc. | 11-20-2014 |
20150131134 | OPTICAL LOGIC GATES AND METHOD FOR GENERATING LOGIC SIGNALS USING DNA BASED NANOSTRUCTURE - An optical logic gate includes: a DNA based nanostructure including DNA and metal nanoparticles coupled to the DNA, the DNA based nanostructure being configured to rotate a polarization plane of an incident light; a polarizer to which light passing through the DNA based nanostructure is incident, the polarizer being configured to extract a component in a direction of a predetermined reference axis from light whose polarization plane is rotated by the DNA based nanostructure; and a detection unit to which light passing through the polarizer is incident, the detection unit being configured to generate a logic signal based on a result obtained by comparing the intensity of the component in the reference axis direction extracted by the polarizer with a predetermined threshold value. | 05-14-2015 |
Chulki Kim, Seoul KR
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20150198477 | DEVICE FOR DETECTING SINGLE PHOTON AVAILABLE AT ROOM TEMPERATURE AND METHOD THEREOF - Disclosed are a device for detecting a single photon available at a room temperature, which includes: a signal transmitting unit including a first electrode and a second electrode spaced apart from each other and at least one nanostructure disposed between the first electrode and the second electrode, the first electrode receiving a signal from the signal generating unit; a photonic crystal lattice structure for receiving a photon, the photonic crystal lattice structure having an optical waveguide for guiding the received photon to the first electrode, the optical waveguide being formed by a plurality of dielectric structures; and a single photon detector for detecting a photon by analyzing a signal output to the second electrode, and a method for detecting a single photon using the device. | 07-16-2015 |
Chulki Lee, Seoul KR
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20130198330 | COOPERATIVE CATCHING METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM - A cooperative caching method and apparatus for reducing data access time and data acquisition cost in a mobile communication system are provided. The cooperative caching method of a local base station in a mobile communication system using caches of base stations cooperatively connected with each other includes determining, when a request for data is received from a client, whether the data is stored in the cache of the local base station; sending, to a home base station, upon determining that the data is not stored in the cache, a request for the data; acquiring the data from one of the home base station and a server according to whether the data is stored in the home base station; and serving the data to the client. | 08-01-2013 |