Chang Kun
Chang Kun Baek, Busan KR
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20080276739 | Power Transmission Apparatus - The present invention relates to a power transmission apparatus having a high efficiency, which can cany out the rolling friction by constructing a cross shaft gear comprising a plurality of teeth formed with teeth grooves inclined to a desired angle, and a roller type mediation member having a plurality of rotation teeth engaged with the teeth grooves of the gear to thereby prevent the loss of the power and ensure the reliability of the operation and make it easy to fabricate, so as to embody the chainless power transmission for a bicycle. The power transmission apparatus of the present invention comprises a first gear having a first rotation shaft, a disk body installed at the first rotation shaft, a plurality of teeth arranged at a periphery of the disk body in the radial direction, and a plurality of teeth grooves, each of which is formed between the teeth and is arranged to define an acute angle relative to a virtual plane formed by the disk body; a mediation member having two rotation bodies spaced apart from each other, and a plurality of rotation teeth rotatably secured between the two rotation bodies by means of shaft pins so as to be engaged with the teeth grooves of the first gear, and in which an axial line of the pair of rotation bodies is arranged to define an acute angle relative to an axial line of the rotation tooth; and wherein the first gear and the mediation member define a cross shaft gear. | 11-13-2008 |
Chang Kun Chang, Chayi County TW
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20100126486 | COMPACT PAINTBALL MARKER TRIGGER MECHANISM - A compact paintball marker having a compact trigger assembly. The trigger assembly includes a trigger, a sear, a sear activator and a connecting cable. The sear is position distally relative to the trigger. This enables the sear to be positioned apart from the trigger. The trigger assembly also includes a sear activator, a sear activator spring and a sear biasing spring. The components of the trigger assembly can be compactly organized to enable the marker to have a smaller form factor. | 05-27-2010 |
Chang Kun Kim, Yongin-Si KR
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20080312355 | Composition For Forming Prism Layer And Prism Film Manufactured Using The Same - A composition for forming a prism layer and a prism film manufactured using the same. The composition for forming a prism layer includes a UV-curable monomer A, including a fluorene derivative diacrylate monomer represented by Formula 1 or 2; a UV-curable monomer B, including at least one acrylate monomer; a photoinitiator; and an additive, and thus is excellent in surface strength, adhesion to a substrate film and anti-yellowing properties, with a viscosity suitable for formation of the prism layer. | 12-18-2008 |
20130010234 | OPTICAL FILM AND MANUFACTURING METHOD THEREOF, LIQUID CRISTAL DISPLAY APPARATUS USING THE OPTICAL FILM - An optical sheet having a single sheet structure for an edge-lighting backlight unit using a printless light guide plate, a method of manufacturing the same, and a liquid crystal display apparatus using the same are provided. The optical sheet having a single sheet structure includes a first prism sheet having a prism pattern formed on the upper surface thereof, and a second prism sheet having a prism pattern formed on the upper surface thereof. Further, prism ridges of the first prism sheet are attached to the bottom surface of the second prism sheet by means of an adhesive so that the prism pattern of the first prism sheet and the prism pattern of the second prism sheet are directed in the same direction. | 01-10-2013 |
Chang Kun Park, Ichon-Si KR
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20100064163 | DOMAIN CROSSING CIRCUIT OF A SEMICONDUCTOR MEMORY APPARATUS - A domain crossing circuit of a semiconductor memory apparatus, the domain crossing circuit comprising first and second count signals generated at substantially a same clock period, and representing predetermined clock differences with reference to an internal clock signal with respect to same bit combination data, and a data processing unit configured to provide output data corresponding to input data based on the second count signal in response to the input data synchronized to an external clock signal. | 03-11-2010 |
20100117702 | DUTY CYCLE CORRECTION APPARATUS AND SEMICONDUCTOR INTEGRATED CIRCUIT HAVING THE SAME - A duty cycle correction apparatus includes a fixed delay unit configured to set a fixed delay time to a DLL clock signal and generate a delay rising clock signal; a variable delay unit configured to delay the DLL clock signal in response to a control signal and generate a delay falling clock signal; a duty cycle correction unit configured to generate a correction rising clock signal and a correction falling clock signal that are toggled in conformity with edge timing of the delay rising clock signal and the delay falling clock signal; and a delay control unit configured to detect duty cycles of the correction rising clock signal and the correction falling clock signal and generate the control signal. | 05-13-2010 |
Chang Kun Park, Suwon-Si KR
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20130187745 | TRANSMISSION-LINE TRANSFORMER IN WHICH SIGNAL EFFICIENCY IS MAXIMISED - Provided is a transmission line transformer having increased signal efficiency. The transmission line transformer is formed on an integrated circuit (IC), wherein a first transmission line disposed in one direction. Second and third transmission lines have same length direction as the first transmission line and are spaced apart from each other in a lateral direction above or below the first transmission line. Accordingly, an area of the first transmission line and areas of the second and third transmission lines, which face each other, are increased, thereby improving a coupling factor. Also, since a secondary transmission line is divided into two regions and uses the second and third transmission lines that have narrower widths than the first transmission line, parasitic capacitance components generated between the first through third transmission lines and a semiconductor substrate may be decreased. | 07-25-2013 |
20130200981 | TRANSMISSION LINE TRANSFORMER WHICH MINIMIZES SIGNAL LOSS - Provided is a transmission line transformer, and more particularly, a transmission line transformer capable of decreasing a power loss caused by a parasitic resistance component of the transmission line transformer and improving a coupling factor by forming a primary transmission line and a secondary transmission line parallel to each other on an integrated circuit (IC) by using a highest layer metal line, and forming a lower layer metal line immediately below the highest layer metal line in addition to the highest layer metal line in a region where the primary transmission line and the secondary transmission line face each other, while forming the transmission line transformer used in a high frequency circuit via a semiconductor process. | 08-08-2013 |
20130207224 | DIODE FOR ELECTROSTATIC PROTECTION - Provided is an electrostatic discharge (ESD) protection diode that is formed on an input/output pad of an integrated circuit (IC), the ESD protection diode including: an N-type semiconductor that constitutes a first diode and is connected to a pad for a power supply voltage; a P-type semiconductor that constitutes the first diode and is connected to a signal line; an N-type semiconductor that constitutes a second diode and is connected to the signal line; a P-type semiconductor that constitutes the second diode and is connected to a pad for grounding; and a third diode that is formed by contacting the N-type semiconductor of the first diode and the P-type semiconductor of the second diode. | 08-15-2013 |
20140125397 | LEVEL CONVERTER FOR CONTROLLING SWITCH - Provided is a power amplifier using a differential structure. The power amplifier includes: first and second transistors whose first terminals are each connected to a first power supply source supplying a first voltage and into which signals having the same size and opposite polarities are input; third and fourth transistors whose first terminals are respectively connected to the first terminals of the first and second transistors; and a fifth transistor whose first terminal is connected to second terminals of the third and fourth transistors and controlling oscillation of the third or fourth transistor. | 05-08-2014 |
20140138798 | POWER VOLTAGE SUPPLY APPARATUS FOR THREE DIMENSIONAL SEMICONDUCTOR - Provided is a power voltage supply apparatus of a 3-dimensional (3D) semiconductor. The power voltage supply apparatus includes a plurality of integrated circuits (ICs) which each include a first through silicon via (TSV) and a second TSV, are stacked such that the first TSVs are connected and second TSVs are connected, and are mounted on a printed circuit board (PCB), wherein a first PCB line formed on the PCB and supplying a first voltage is connected to a bottom of a first TSV of a bottom IC from among the plurality of ICs, and a second PCB line formed on the PCB and supplying a second voltage is connected to a top of a second TSV of a top IC. | 05-22-2014 |
20140139271 | INTEGRATED CIRCUIT HAVING STACK STRUCTURE - Provided is an integrated circuit (IC) having a stacked structure. The IC includes: a first IC having a power input terminal to which a power supply voltage is applied; and a second IC having a power input terminal connected to a ground terminal of the first IC, having a central node formed as the power input terminal of the second IC and the ground terminal of the first IC are connected to each other and to which a voltage is applied, and having a ground terminal connected to a ground source, wherein the power supply voltage is divided into first and second voltages that are respectively applied to the first and second ICs. | 05-22-2014 |