Joo-Yul
Joo Yul Ko, Hwaseong KR
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20130063069 | APPARATUS AND METHOD OF DRIVING MOTOR WITH INITIAL COMPENSATION - There are provided an apparatus and a method for driving a motor with initial compensation. The apparatus for driving a motor includes a current detecting part detecting a voltage of a driving current flowing in the motor through an inverter supplying the driving current to the motor; a peak value detecting part detecting a peak value of the voltage detected by the current detecting part; an A/D converting part converting the voltage from the peak value detecting part into a digital signal; and a driving controlling part driving the motor for a predetermined initial driving period to compensate for an offset in the driving current based on the digital signal from the A/D converting part. | 03-14-2013 |
20130106324 | MOTOR DRIVING APPARATUS | 05-02-2013 |
Joo Yul Ko, Suwon, Gyunggi-Do KR
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20140176031 | BACK ELECTROMOTIVE FORCE DETECTION CIRCUIT AND MOTOR DRIVING CONTROL APPARATUS USING THE SAME - There are provided a back electromotive force detection circuit and a motor driving control apparatus using the same. The back electromotive force detection circuit includes a duty determining unit and a delay compensation unit. The duty determining unit outputs a differential level according to a duty of a driving control signal of a motor. The delay compensation unit performs delay compensation differently on each differential level to compensate for a delay in back electromotive force of the motor regardless of a variation in a duty of the driving control signal. | 06-26-2014 |
Joo Yul Ko, Suwon-Si KR
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20150123583 | MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR SYSTEM USING THE SAME - A motor driving control apparatus may include a zero cross point (ZCP) detecting unit detecting back electromotive force generated by a motor apparatus and detecting a plurality of zero cross points in the back electromotive force, a zero cross point correcting unit correcting the plurality of zero cross points when a time interval between the plurality of zero cross points is equal to a predetermined error period or longer, and a controlling unit controlling driving of the motor apparatus using the plurality of corrected zero cross points. | 05-07-2015 |
Joo Yul Lee, Jangyu-Myeon Gimhae-Si Gyeongsangnam-Do KR
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20150125756 | CURRENT COLLECTOR FOR BATTERY COMPRISING METAL MESH LAYER AND MANUFACTURING METHOD THEREFOR - Provided are a current collector for a battery, including: a base material; adhesive layers positioned on the base material; and metal mesh layers positioned on the adhesive layers, in which the metal mesh layer includes a plurality of metal mesh patterns, and holes positioned between the metal mesh patterns, and a method of manufacturing the same. An active material is applied onto the metal mesh layer through the holes of the metal mesh layer, and thus a contact area of the metal mesh layer and the active material is increased, so that it is possible to restrict the active material from being deintercalated from the current collector and improve a cycle lifespan property of a battery. | 05-07-2015 |
Joo-Yul Lee, Suwon-Si KR
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20080238822 | PLASMA DISPLAY AND DRIVING METHOD THEREOF - A plasma display includes a plurality of first electrodes divided into at least two groups. In the plasma display, first group cells corresponding to first electrodes of the first group are initialized, and light emitting cells are selected from the first group cells to be sustain-discharged. In addition, second group cells corresponding to the first electrodes of the second group are initialized, and light emitting cells are selected from the second group cells to be sustain-discharged. | 10-02-2008 |
20090121979 | Method of driving plasma display panel - A method of driving a plasma display panel (PDP) capable of improving gray scale display comprises the steps of applying pulses having a first voltage to first electrodes and second electrodes during a sustain period of at least one subfield and reducing a voltage of the first electrodes to a voltage of no more than one-half of the first voltage while maintaining a voltage of the second electrode at a second voltage. | 05-14-2009 |
20090122051 | Plasma display device and driving method thereof - The plasma display device includes a plurality of discharge cells, a controller, and a driver. The controller is configured to divide one frame into a plurality of subfields each having a weight value, determine a sustain number allocated to one frame according to a screen load ratio calculated based on video signals inputted for a duration of a frame, allocate the sustain number allocated for one frame to the subfields, and set a minimum sustain number allowed at each screen load ratio and a target sustain number at each screen load ratio. The driver is configured to apply sustain pulses of as many as the sustain number allocated to each subfield to the discharge cells in each subfield. Whenever a first screen load ratio of a current frame is smaller than a second screen load ratio of a previous frame coming right before the current frame, the controller determines a starting point according to a sustain number of the previous frame and the sustain number of the first screen load ratio, and gradually increases the sustain number of the first screen load ratio from the starting point to the target sustain number of the first screen load ratio through subsequent frames. | 05-14-2009 |
20090128456 | PLASMA DISPLAY PANEL AND DRIVING METHOD THEREOF - A driving method for a plasma display panel to improve brightness when the load is low is provided. The driving method of the plasma display panel includes allocating a first number of sustain pulses for driving the plasma display panel when a load of the plasma display panel exceeds a reference load. The first number of sustain pulses is allocated as a function of a power consumption of the plasma display panel. The method further includes allocating a second number of sustain pulses for driving the plasma display panel when the load is less than the reference load. The second number of sustain pulses is allocated to improve brightness. | 05-21-2009 |
20100141157 | PLASMA DISPLAY DEVICE - A plasma display device having a first diode with an anode coupled to an electrode. A first switch is coupled between a cathode of the first diode and a first voltage source that supplies a first voltage. A first inductor and a second switch are coupled in series between a power recovery capacitor and the cathode of the first diode, and a third switch is coupled between the anode of the first diode and a second voltage source that supplies a second voltage lower than the first voltage. | 06-10-2010 |
Joo-Yul Lee, Gyeongsangnam-Do KR
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20120024714 | TRIVALENT CHROMIUM PLATING SOLUTION AND PLATING METHOD USING THE SAME - Provided is hard trivalent chromium plating solution having improved covering power. The trivalent chromium plating solution comprises a trivalent chromium compound comprising a compound of formula (1) below; | 02-02-2012 |
20120291275 | METHOD OF FORMING METAL INTERCONNECTION LINE ON FLEXIBLE SUBSTRATE - Provided is a method of forming a metal interconnection line on a flexible substrate, wherein the method includes: coating a hard mask layer on at least one surface of the flexible substrate, followed by performing photolithography thereon to form a predetermined hard mask pattern; etching a portion of the flexible substrate by using the hard mask pattern as a mask to form a trench; plasma treating the inside of the trench by using a treatment gas for pre-treating the flexible substrate; coating a seed layer inside the trench; removing the hard mask pattern; and filling the inside of the trench coated with the seed layer with metal. A metal interconnection line formed by using the method may have a strong adhesion force with respect to the flexible substrate. | 11-22-2012 |
Joo-Yul Park, Seoul KR
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20120131415 | METHOD OF SETTING NUMBER OF ITERATION COUNTS OF ITERATIVE DECODING, AND APPARATUS AND METHOD OF ITERATIVE DECODING - A method of setting a number of iteration counts of iterative decoding, and an apparatus and method of iterative decoding. The iterative decoder including a signal-to-noise ratio (SNR) estimation unit that estimates an SNR of a received signal, an iterative decoding count setting unit that sets a minimum number of iteration counts for the received signal based on the estimated SNR, and a decoding unit that iteratively decodes the received signal using tentative decoding and error check, and selectively performs the error check based on the minimum number of iteration counts. | 05-24-2012 |
20140250349 | METHOD OF SETTING NUMBER OF ITERATION COUNTS OF ITERATIVE DECODING, AND APPARATUS AND METHODS OF ITERATIVE DECODING - A method of setting a number of iteration counts of iterative decoding, and an apparatus and method of iterative decoding. The iterative decoder including a signal-to-noise ratio (SNR) estimation unit that estimates an SNR of a received signal, an iterative decoding count setting unit that sets a minimum number of iteration counts for the received signal based on the estimated SNR, and a decoding unit that iteratively decodes the received signal using tentative decoding and error check, and selectively performs the error check based on the minimum number of iteration counts. | 09-04-2014 |