Gilwon
Gilwon Han, Seoul KR
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20090213569 | Backlight unit - A backlight unit is disclosed. The backlight unit includes a light source unit generating light, a beam profile changer at the side of the light source unit, a reflective plate under the beam profile changer, and an optical film positioned on the beam profile changer and the reflective plate. The beam profile changer includes an incident surface facing the light source unit and an emitting surface positioned in a direction parallel to the incident surface. The reflective plate includes a first reflective surface having a first reflective area and a second reflective surface having a second reflective area. The second reflective surface is inclined from an end of the first reflective surface to an upward direction. | 08-27-2009 |
20090213570 | BACKLIGHT UNIT - A method of fabricating backlight unit is disclosed. The backlight unit method of fabricating backlight unit includes, preparing a base member having a predetermined thickness, applying ultraviolet curing resin on a surface of the base member transferring prism patterns to the ultraviolet curing resin using a flexible mold having engraved patterns corresponding to the prism patterns, and curing the prism patterns before the prism patterns are separated from the engraved patterns of the flexible mold. | 08-27-2009 |
Gilwon Hong, Seoul KR
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20110115416 | APPARATUS FOR DRIVING MOTOR OF ELECTRIC VEHICLE - An apparatus for driving a motor of an electric vehicle is provided. The apparatus includes a capacitor supplied with power by a battery; an inverter configured to include a plurality of switching elements, convert direct current (DC) power stored in the capacitor into alternating current (AC) power in accordance with the switching of the switching elements and drive a motor with the AC power; and a capacitor protector provided between the battery and the capacitor and configured to consume initial power supplied by the battery at an early stage of the supply of power by the battery, the capacitor protector including a common resistor that consumes the DC power stored in the capacitor when the capacitor is discharged. Therefore, it is possible to guarantee the reliability of the apparatus. | 05-19-2011 |
20120299409 | ELECTRIC MOTOR AND ELECTRIC VEHICLE HAVING THE SAME - An electric motor disposed in an electric vehicle includes a stator, a first rotor located at an outer side of the stator, and a second rotor located at an inner side of the stator, wherein each of the first rotor and the second rotor includes a plurality of first permanent magnets and a plurality of second permanent magnets, made of different materials from each other, whereby a material cost can be reduced and an output can be enhanced. | 11-29-2012 |
Gilwon Lee, Gyeonggi-Do KR
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20150230266 | USER SCHEDULING AND BEAMFORMER DESIGN METHOD, APPARATUS, AND STORAGE MEDIUM BASED ON TWO-STAGE BEAMFORMER FOR MASSIVE MIMO DOWNLINK - Disclosed herein are a user scheduling and beamformer design method, apparatus, and storage medium for multi-user MIMO downlink based on two-stage beamforming or single-stage beamforming. The user scheduling and beamformer design method includes 1) a two-step feedback approach, 2) the use of orthonormal reference beam vectors, 3) computation of the angle between the user's channel vector and each of the orthonormal reference beam vectors, 4) first-step feedback of the reference beam index to which the user's channel vector's angle is less than a certain threshold and feedback of the user's channel vector's norm, 5) selection of roughly orthogonal users with large channel norm based on the use of reference beam vectors and the channel norm feedback, 6) second-step feedback of the channel state information (CSI) from the scheduled users, 7) design of multi-user downlink beamformer for the scheduled users based on the second-step feedback of the CSI of the scheduled users. The main key point of this invention is that in the first step of user selection, we propose to use the channel norm or noise-plus-interference-divided channel norm as the feedback quantity and we propose to use only the angle between each of the reference beam vectors and the user's channel vector to identify the closest reference beam vector. | 08-13-2015 |
Gilwon Seo, Hwaseong KR
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20140350804 | SMART PARKING ASSISTANT SYSTEM AND METHOD OF CONTROLLING PARKING ALIGNMENT - A smart parking assistant system and a method of controlling parking alignment are provided. The smart parking assistant system includes a determination controller configured to confirm a driver intention of whether to perform an automatic parking alignment function. A parking alignment controller is configured to perform the automatic parking alignment function when the driver intention is confirmed. | 11-27-2014 |
Gilwon Yoon, Seoul KR
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20080238563 | APPARATUS AND METHOD FOR MEASUREMENT OF TEMPERATURE USING OSCILLATORS - A temperature sensor includes: a first oscillator that generates a first frequency signal; a second oscillator that generates a second frequency signal; a multiplexer that selectively passes the first frequency signal and the second frequency signal; and a frequency-to-digital converter that converts a frequency difference between the first frequency signal and the second frequency signal into a digital code. | 10-02-2008 |