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Dae-Kyu

Dae-Kyu Choi, Gyeonggi-Do KR

Patent application numberDescriptionPublished
20090291027PLASMA REACTOR WITH INTERNAL TRANSFORMER - There is provided a plasma reactor with an internal transformer. The plasma reactor comprises: a plasma chamber with a gas inlet and a gas outlet, for providing a plasma discharging space; one or more core cylinder jackets for providing a core storage space in the plasma discharging space and forming a plasma centralized channel and a plasma decentralized channel by including one or more through-apertures; and one or more transformers each including a magnetic core with primary winding surrounding the through-aperture and installed in the core storage space, wherein the plasma discharging space comprises one or more first spatial regions to form the plasma centralized channel and one or more second spatial regions to form the plasma decentralized channel. In the plasma reactor, since the transformer is installed in the plasma chamber, energy is transferred with almost no loss from the transformer to the plasma discharging space and therefore the energy transfer efficiency is very high. Then, since most of gases flow through the first spatial region and the through-aperture inside the plasma chamber, most of active gases are generated in the plasma centralized channel. Consequently, the plasma reactor is very suitable for generating large amount of active gases. Further, even though the plasma chamber is composed of a conductive material, since no special insulating region needs to be formed, it is very easy to constitute the plasma chamber. Further, since the plasma chamber itself is sufficiently capable of forming an outer case, the plasma reactor is very simply manufactured.11-26-2009

Dae-Kyu Choi, Suwon-Si KR

Patent application numberDescriptionPublished
20090229758Apparatus for generating gas plasma, gas composition for generating plasma and method for manufacturing semiconductor device using the same - A method for manufacturing a semiconductor device may include: forming a main magnetic field having an axis, and forming a subsidiary magnetic field substantially parallel to the axis; applying an alternating current along a path between the main and the subsidiary magnetic fields; allowing a gas to flow along a flow path along the path of the current so that a gas plasma is generated from the gas; providing the gas plasma into a chamber separated from a position where the gas plasma is generated; and performing a process for manufacturing a semiconductor device by employing the gas plasma.09-17-2009

Patent applications by Dae-Kyu Choi, Suwon-Si KR

Dae-Kyu Kim, Yongin-Si KR

Patent application numberDescriptionPublished
20110052974SECONDARY BATTERY - A secondary battery including an electrode assembly and a can housing the electrode assembly, wherein the can has at least one recessed portion in a side surface thereof. Here, a value obtained by subtracting a diameter of the electrode assembly from a gap length between facing inner surfaces of the can ranges from about −0.12 mm to about 0.10 mm.03-03-2011
20110076548SECONDARY BATTERY - A secondary battery is disclosed. In one embodiment, the battery includes an electrode assembly having a diameter of L03-31-2011
20110076549SECONDARY BATTERY AND METHOD OF FABRICATING THE SAME - A secondary battery and a method of fabricating the same. The secondary battery includes an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator interposed therebetween, a sealing tape surrounding a circumferential surface of the electrode assembly, a can housing the electrode assembly, and a cap assembly sealing the can. The sealing tape is formed of a heat-shrinkable material. The can is heated at a predetermined after the electrode assembly and the sealing tape are sealed in the can, to shrink the sealing tape.03-31-2011
20110143190SECONDARY BATTERY - A secondary battery is disclosed. The secondary battery includes an adhesive configured to attach to the electrode plates so as to strengthen the battery against separation, to reduce production of dust, and to protect the battery from dust.06-16-2011

Dae-Kyu Shin, Suwon-Si KR

Patent application numberDescriptionPublished
20090158168APPARATUS AND METHOD FOR CONFIGURING IDLE SCREEN - An apparatus and a method for configuring an idle screen, and more particularly, to an apparatus and method for analyzing functions of a terminal according to a user's environmental state, and configuring an idle screen in accordance with the analysis. According to the apparatus and method, when a change in a current environmental state is sensed while performing the selected terminal function, the terminal determines an environmental state information item corresponding to a changed environmental state, and updates the selected terminal function in a terminal function item corresponding to the determined environmental state information item. When there is a request for displaying an idle screen, the terminal determines a current environmental state item corresponding to the currently environmental state, extracts one or more terminal functions corresponding to the determined environmental state information item, and configures the idle screen using the extracted terminal functions.06-18-2009
20090319919Apparatus and method for dynamically creating a community space in a virtual space - An apparatus and method for dynamically creating a community space in a virtual space. A request for a connection to a personal web space of another user to be visited by a user possessing a personal web space is made. When the connection request is identified, a new community space is generated by connecting the personal web spaces of the users to each other. Immediate interaction between the users is performed in the generated new community space.12-24-2009
20100177696Apparatus and method for sharing information through presence service in a communication network - An apparatus is capable of sharing information through a presence service in a communication network and capable of providing presence information of a Mobile Station (MS). The apparatus extracts at least one of application information and contents indication information from an application in execution. Presence information is generated that includes at least one of the application information and the contents indication information, and transmitting the presence information to a presence server.07-15-2010
20100180012APPARATUS AND METHOD FOR MULTIMEDIA FILE STREAMING IN PORTABLE TERMINAL - An apparatus and method for multimedia file streaming are provided. In a method for multimedia file streaming in a receiving portable terminal, the method includes determining meta data included in a received packet, generating new meta data having a circular-type media data offset on the basis of the meta data, storing media data included in the packet received in a circular manner according to the media data offset included in the new meta data, and loading the media data stored according to the media data offset included in the new meta data.07-15-2010
20100328431Rendering method and apparatus using sensor in portable terminal - A method and an apparatus detect motion, rotation, and tilt for rendering using a sensor in a portable terminal. The rendering method using the sensor in the portable terminal includes pre-rendering a region of a size corresponding to a screen of the terminal and a surrounding region. A preset region of the pre-rendered regions is displayed. A motion of the terminal is detected using a sensor, and a region to display in the pre-rendered regions is changed according to the motion.12-30-2010

Patent applications by Dae-Kyu Shin, Suwon-Si KR

Dae-Kyu Yu, Gyeongsangbuk-Do KR

Patent application numberDescriptionPublished
20090273398DOHERTY POWER AMPLIFIER - The present invention relates to a power amplifier; and, more particularly, to a Doherty power amplifier. The power amplifier includes at least one carrier amplifier; at least one peaking amplifier arranged in parallel with the carrier amplifier in such a manner that the carrier amplifier and the peaking amplifier collectively operate as a Doherty amplifier; a plurality of input matching circuits, at least one of which is respectively connected to an input ends of the carrier amplifier and the peaking amplifier; at least one impedance control circuit, each of which is connected to an output end of each carrier amplifier for controlling a load line impedance of the said each carrier amplifier; at least one output matching circuit directly or indirectly connected to output ends of the impedance control circuit and the peaking amplifier; and at least one first delay circuit for matching delays between the carrier amplifier and the peaking amplifier. The present invention provides an improved Doherty power amplifier capable of achieving a further miniaturization and integration while maintaining an advantage in terms of efficiency and linearity of a Doherty power amplifier by employing an improved output and input matching method, and capable of operating more similar to the ideal operation of a Doherty power amplifier by applying an improved input power division method thereto.11-05-2009