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Jhung
Jae-Myoung Jhung, Yongin-City KR
| Patent application number | Description | Published |
|---|---|---|
| 20110170729 | MICROPHONE - A microphone is disclosed. The microphone in accordance with an embodiment of the present invention includes a diaphragm, which is formed with first indentations on the surface thereof, and a back plate, which is installed near a back side of the diaphragm, electrically connected with the diaphragm and formed with second indentations corresponding to the first indentations on the surface thereof. | 07-14-2011 |
Jhinsup Jhung, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20090185586 | WAVELENGTH TUNING APPARATUS AND METHOD THEREOF - A wavelength tuning apparatus and method that maintain highest efficiency with a single angle manipulation without changing a position of input/output light. For this, the wavelength tuning apparatus and method include a transmission-type diffraction grating and a mirror that are constructed in one-body type so that a light path that enables an optimal efficiency diffraction angle of the diffraction grating can be formed, and rotates the one-body construction to obtain a desired wavelength. Accordingly, efficiency and precision of manipulation and control can be increased, and costs can be reduced. | 07-23-2009 |
| 20110183067 | CARBON NANO TUBE COATING APPARATUS AND METHOD THEREOF - The present invention relates to an apparatus and method for coating carbon nano tubes, which is capable of coating carbon nano tubes on a film at the same time when the carbon nano tubes are produced, unlike a wet method, thereby reducing the number of processes and costs and improving performance. The apparatus and method has an advantage of directly applying a CNT-containing gas obtained by thermal chemical vapor deposition to a film to obtain a CNT coating film with the reduced numbers of processes and high quality through improvement of an electrical property by maintenance of dispersibility and CNT length, as compared to a conventional wet process. | 07-28-2011 |
Jhin Sup Jhung, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20120002198 | WAVELENGTH-TUNABLE SPECTROMETER AND WAVELENGTH TUNING METHOD THEREOF - This invention relates to a wavelength tunable spectrometer and a wavelength tuning method thereof, and more particularly to a wavelength tunable spectrometer and a wavelength tuning method thereof which are capable of providing the highest efficiency of wavelength of applied light without replacement of a diffraction grid or without operation of an observed portion. According to embodiments of the present invention, since a spectrum of incident light can be obtained with the optimal diffraction efficiency based on a wavelength of the incident light without motion of a camera for observation and replacement of a diffractor by rotatably arranging a transmission type diffractor to provide an incidence angle to provide the optimal efficiency for a selected wavelength of an external light source to be observed and arranging a mirror to provide light, which is changed in its diffraction angle depending on rotation of the transmission type diffractor and the wavelength of the incident light, on the same output light path irrespective of a change in the rotation of the transmission type diffractor and the wavelength of the incident light, it is possible to reduce a size of the spectrometer, product cost and possibility of failure. | 01-05-2012 |
Sung Hwa Jhung, Daegu-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100273642 | PREPARATION OF SURFACE FUNCTIONALIZED POROUS ORGANIC-INORGANIC HYBRID MATERIALS OR MESOPOROUS MATERIALS WITH COORDINATIVELY UNSATURATED METAL SITES AND CATALYTIC APPLICATIONS THEREOF - Disclosed herein is a method of surface-functionalizing a porous organic-inorganic hybrid material or a organic-inorganic mesoporous material, in which organic substances, inorganic substances, ionic liquids and organic-inorganic hybrid substances are selectively functionalized on the coordinatively unsaturated metal sites of a porous organic-inorganic hybrid material or organic-inorganic mesoporous material, and thus the porous organic-inorganic hybrid material can be used for adsorbents, gas storage devices, sensors, membranes, functional thin films, catalysts, catalytic supports, and the like, and the applications of the surface-functionalized porous organic-inorganic hybrid material prepared using the method to catalytic reactions. | 10-28-2010 |
Sung Hwa Jhung, Taejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100260661 | PREPARATION METHOD OF CHALCOPYRITE-TYPE COMPOUNDS WITH MICROWAVE IRRADIATION - A method for preparing a chalcopyrite-type semiconductor compound which is widely used as a sunlight-absorbing material. More specifically, disclosed is a method for preparing a chalcopyrite-type compound, in which microwaves are used as heat sources in the preparation of the chalcopyrite-type compound, and the chalcopyrite-type compound can be produced in a large amount in a short reaction time using a batch or continuous reactor. | 10-14-2010 |
Sung Hwa Jhung, Daejeon KR
| Patent application number | Description | Published |
|---|---|---|
| 20090130411 | Adsorbent for Water Adsorption and Desorption - The present invention relates to an adsorbent obtained by using porous hybrid inorganic-organic materials that have high surface area, and have pore with the size of molecules or nanometers. More specifically, the present invention relates to a water adsorbent showing facile adsorption-desorption even below 100° C., having high adsorption capacity, and having high desorption capacity when it is heated up to the temperature below 100° C. The adsorbent of the present invention can be applied to a humidifier, dehumidifier, cooler and heater. The present invention also relates to a technology to control humidity using the adsorbent. | 05-21-2009 |
| 20090131703 | Preparation Method of Porous Organic Inorganic Hybrid Materials - The present invention relates to a synthesis method of porous hybrid inorganic-organic materials that can be applied for adsorbents, gas storages, sensors, membranes, functional thin films, catalysts, catalyst supports, encapsulating guest molecules and separation of molecules by the pore structures. More specifically, the present invention relates to the synthesis method of nanocrystalline porous hybrid inorganic-organic materials. | 05-21-2009 |
| 20090263621 | POROUS ORGANIC-INORGANIC HYBRID MATERIALS AND ADSORBENT COMPRISING THE SAME - The present invention relates to an adsorbent using the porous organic-inorganic hybrid material(s) containing iron having a large surface area and a high pore volume, in particular, a water adsorbent. Also, it relates to an adsorbent that can be used in humidifiers, dehumidifiers, coolers/heaters, a refrigerating machine or an air conditioner, etc., which can easily absorb or desorb at 100° C. and below, and has a great adsorption amount per weight of the adsorbent. | 10-22-2009 |
| 20110236298 | Adsorbent for Water Adsorption and Desorption - The present invention relates to methods for absorbing and/or desorbing water by contacting water with hybrid inorganic-organic material having high surface area, and pores with the size of molecules or nanometers. More specifically, the water adsorbent has facile adsorption-desorption even below 100° C., having high adsorption capacity, and having high desorption capacity when it is heated up to the temperature below 100° C. The adsorbent of the present invention can be applied to a humidifier, dehumidifier, cooler and heater. The present invention also relates to a technology to control humidity using the adsorbent. | 09-29-2011 |