Abstract: A method and device for controlling a resonant inductor for implementing ZVS in a push-pull parallel resonant inverter is closed. The present disclosure provides A device comprising: a converter including a full-bridge circuit in which a first switch and a second switch form a first leg and a third switch and a fourth switch form a second leg and configured to convert a DC into an AC by turning on or off the switches; a resonant inductor circuit including a resonant inductor and a resonant switch connected in series and connected between two output nodes of the converter; a transmission coil connected in parallel with the resonant inductor circuit; and a controller configured to convert the DC into the AC by providing a switching timing for turning on or off the switches and control a switching timing of the resonant switch based on switching timings of the switches.

Abstract: An image processing-based foreign substance detection method in a wireless charging system and a device performing the method are disclosed. A method for detecting a foreign substance includes an operation of acquiring an image of a charging area of a wireless charging system, an operation of detecting, based on an RGB value of a frame of the image, a foreign substance in the charging area, an operation of discriminating a type of the foreign substance, and an operation of performing power control of the wireless charging system according to the type of the foreign substance.

Abstract: A display device includes gate lines disposed on a substrate in a first direction, data lines disposed on the substrate in a second direction crossing the first direction, the data lines being insulated from the gate lines, a first insulating film disposed between the data lines, a second insulating film disposed on the data lines and the first insulating film, and a first electrode disposed on the second insulating film. The first insulating film does not overlap the data lines in a direction perpendicular to the substrate.

Abstract: Provided is a robot charging apparatus to wirelessly charge a robot capable of walking, which includes a plurality of receiving coils fixed to legs of a robot and a transmitting coil moved and provided according to a position of the robot and wirelessly charges the robot in such a manner that the transmitting coil is provided between the plurality of receiving coils and coupled to the receiving coils by a magnetic field output from the transmitting coil.

Abstract: A low-loss spiral coil includes a conducting wire wound N turns of which a width of each of wires corresponding to each of sections of the conducting wire is determined by setting an entire width of the conducting wire to be a width of M sections of the conducting wire, and then determining the width of each of the wires such that a resistance of the spiral coil formed based on the width of the M sections is minimized.

Abstract: An OLED panel may include a substrate including a first region and a second region disposed along a first direction. A plurality of first pixels are disposed in the first region on the substrate, the first pixels each having a first area, the first pixels each comprising a first unit pixel, a second unit pixel disposed along a second direction from the first unit pixel, and a transmission portion disposed along the first direction from the first unit pixel and the second unit pixel. A plurality of second pixels are disposed in the second region on the substrate, the second pixels each having a second area less than the first area, the second pixels each comprising a third unit pixel. The first unit pixel, the second unit pixel, and the third unit pixel may have substantially the same shape as each other.

Abstract: A charging system for an electrified vehicle includes: a first switch unit selectively connected at one end thereof to first ends or to second ends of a plurality of coils included in a motor; a plurality of switches each connected at one end thereof to another end of the first switch unit while other ends of the plurality of switches are inter-shorted to form a neutral point of the motor; and a controller configured to control a switching state of the first switch unit.

Abstract: A wireless charging reception system and control method capable of adjusting resonance frequency are disclosed. According to an embodiment of the present disclosure, a wireless charging reception system capable of adjusting the resonance frequency may include a resonance circuit unit including a circuit in which a resonance inductor and a resonance capacitor are connected in parallel; a transmission circuit unit including a transmission inductor and a power supply voltage unit adjacent to the resonance inductor within a threshold distance; a switch unit connected in parallel with the resonance circuit unit and including at least one switch; a rectifier circuit connected in parallel with the switch unit and the resonance circuit unit; and a control unit that controls a phase of transmission current flowing through the transmission inductor generated through the power voltage unit to be same as a phase of current associated with the at least one switch.

Abstract: The present disclosure relates to a method and apparatus for performing multiple wireless charging. A method or performing wireless charging according to an embodiment of the present disclosure may comprise: identifying one or more receiving coils subject to wireless charging; setting a plurality of transmission frequencies based on a plurality of receiving coils being identified; and transmitting a wireless power transmission signal to the plurality of receiving coils using a plurality of transmitting coils connected to one inverter. Herein, a wireless power transmission signal transmitted from each transmitting coil belonging to the plurality of transmitting coils may be generated by applying the plurality of transmission frequencies in a pre-configured order.

Abstract: Disclosed are a projectile tracking method using a pseudo random noise code and an apparatus therefor. A projectile tracking system which tracks a projectile using a pseudo random noise code according to an exemplary embodiment of the present invention includes a beacon processing device which is provided in a projectile to acquire a tracking packet signal and generates and transmits a response packet signal based on a pseudo random noise code included in the tracking packet signal; and a ground tracking device which transmits the tracking packet signal to the projectile, acquires the response packet signal, calculates a transmission/reception delay time using a packet reception time determined based on a timing error for the response packet signal, and calculates a distance from the projectile using the transmission/reception delay time to track a flight trajectory of the projectile.

Abstract: A wireless power transmission resonator using a conducting wire with a vertical rectangular cross-section is disclosed. The wireless power transmission resonator may include a first element including a first element upper part arranged in an upper end of a resonator and a first element lower part arranged in a lower end of the resonator, wherein the first element upper part and the first element lower part each may include a spiral layer having a spiral structure that is wound to face a wide surface of a conducting wire including a vertical rectangular cross-section and a second element arranged in a center of the resonator and between the first element upper part and the first element lower part and including a spiral layer having a spiral structure that is wound to face the wide surface of the conducting wire including the vertical rectangular cross-section.

Abstract: A wireless charging system for attenuating electromagnetic waves is provided. The wireless charging system includes a transmitter including a clock generator configured to generate clock signals having reverse phases from each other, inverters configured to output inverter voltage/current signals having a same magnitude and reverse phases from each other using the clock signals generated by the clock generator, matching portions respectively connected to the inverters and configured to output transmission coil voltage/current signals having a same magnitude and reverse phases from each other using the inverter voltage/current signals, and transmission coils respectively connected to the matching portions and configured to generate magnetic fields towards a reception coil using the transmission coil voltage/current signals.

Abstract: A wireless power transmitter that changes an operation frequency and an operation method of the same are provided. The operation method includes controlling the wireless power transmitter to operate at a first operation frequency included in an operation frequency set, changing an operation frequency of the wireless power transmitter from the first operation frequency to a second operation frequency that is different from an operation frequency of a second wireless power transmitter that is adjacent to the wireless power transmitter for every channel duration, and controlling the wireless power transmitter to operate at the second operation frequency.

Abstract: The present disclosure relates to an image processing method for a multi-dimensional region of interest (ROI) in a wireless charging system. More specifically, the method includes determining whether a surveillance target exists in the multi-dimensional ROI by performing, regarding the surveillance target, the process of removing a false-alarm region and including an excluded ROI.

Abstract: A wireless charging system, a method of removing a foreign object in the wireless charging system, and a computing device performing the method are provided. The wireless charging system includes a transmission coil cover mounted to surround a transmission coil of a transmission device, a reception coil cover mounted to surround a reception coil of a reception device, and a direct current (DC) conducting wire attached to each of the transmission coil cover and the reception coil cover, wherein the wireless charging system may be configured to remove a foreign object attached to the transmission coil cover or the reception coil cover by using a force acting on the DC conducting wire according to a direction of a current flowing in the DC conducting wire and a direction of a magnetic field perpendicular to the direction of the current.

Abstract: An exemplary embodiment of the present inventive concept provides a display device including: a substrate; a plurality of first wires extending along a first direction on the substrate; a first insulating layer disposed on the plurality of first wires; a plurality of second wires disposed on the first insulating layer and extending along a second direction crossing the first direction; a second insulating layer disposed on the plurality of second wires; and a plurality of pixel electrodes disposed on the second insulating layer, wherein the second insulating layer includes a first opening which is disposed between the plurality of pixel electrodes.

Abstract: A resonant coil coupled with an electromagnetic field is disclosed. A Fraunhofer resonant coil includes an upper spiral element and a lower spiral element, an upper conical element connected to the upper spiral element and including one or more layers formed of a plurality of plies, a lower conical element connected to the lower spiral element and including one or more layers formed of a plurality of plies, and a feeding device connected to a gap between the upper conical element and the lower conical element and configured to supply power.

Abstract: A display device includes a pixel driving circuit, a first-type light-emitting element electrically connected to the pixel driving circuit, a second-type light-emitting element electrically connected to the pixel driving circuit, and a light path control layer disposed to overlap the second-type light-emitting element, where the light path control layer controls a path of light provided from the second-type light-emitting element.

Abstract: Provided is a reflector/scatterer arranged around a side lobe beam which is generated from a transmission antenna, in a radiation direction of the side lobe beam, for use in expanding a communication service coverage area.

Abstract: An electrified vehicle includes a motor including a plurality of windings, a first inverter connected to a first end of each of the plurality of windings and configured to drive the motor, a second inverter connected to a second end of each of the plurality of windings and configured to drive the motor in a second driving mode of a first driving mode and the second driving mode, a first controller configured to determine one of first and second output limit lines as an output limit line of the first driving mode, depending on whether a preset condition is satisfied, and a second controller configured to bidirectionally switch the first driving mode and the second driving mode within an operating point range according to the output limit line of the first driving mode in accordance with a value of a torque command for the motor and counter magnetic flux of the motor.