Abstract: A washing machine actively resolving unbalancing is provided. The washing machine includes: a drum accommodating laundry and configured to be rotatable; a balancing unit moving along the circumference of the drum and changing the center of gravity of the drum; and a wireless power transmission unit wirelessly supplying power to the balancing unit.

Abstract: A power transmitter according to an embodiment disclosed herein can include a power conversion unit configured to form a wireless power signal using power supplied from a power supply unit and receive a modulated wireless power signal containing a packet; a communication unit configured to transmit and receive user data via connection to a power receiver; and a control unit configured to detect the power receiver using the wireless power signal, decode a connection configuration packet transmitted from the power receiver based on the modulated wireless power signal, and establish the connection to the power receiver based on access information included in the connection configuration packet.

Abstract: A washing machine actively resolving unbalancing is provided. The washing machine includes: a drum accommodating laundry and configured to be rotatable; a balancing unit moving along the circumference of the drum and changing the center of gravity of the drum; and a wireless power transmission unit wirelessly supplying power to the balancing unit.

Abstract: A power transmitter according to an embodiment disclosed herein can include a power conversion unit configured to form a wireless power signal using power supplied from a power supply unit and receive a modulated wireless power signal containing a packet; a communication unit configured to transmit and receive user data via connection to a power receiver; and a control unit configured to detect the power receiver using the wireless power signal, decode a connection configuration packet transmitted from the power receiver based on the modulated wireless power signal, and establish the connection to the power receiver based on access information included in the connection configuration packet.

Abstract: A recording/reproducing apparatus and a tracking control method which can perform data processing for reliably recording or reproducing data on or from a recording medium are disclosed. Tracking error signal (TE) is generated using difference signal (A?B) produced from reflected light from a recording medium and an offset included in the difference signal is compensated for using another reflected light received separately from the reflected light. Offset-compensated tracking error signal ((A?B)?k(C?D)) is obtained by subtracting another difference signal (C?D) produced from the separately received reflected light according to gain (k) from difference signal (A?B). Different gains may be used for areas on the recording medium having different reflectances. Thus, the tracking error signal can be compensated for an optical offset caused by lens movement and an offset caused by different reflectances and light radiated to the recording medium can accurately follow its track to perform reliable data processing.

Abstract: A method and apparatus for preventing a collision between a recording medium and a lens are disclosed. The method for preventing the collision between the recording medium and the lens includes controlling a gap error signal (GES) between the recording medium and the lens to be maintained at a near field level, detecting a collision between the recording medium and the lens, pulling out the lens from the recording medium during a predetermined time so as to prevent a re-collision between the recording medium and the lens, and re-controlling the gap error signal (GES) between the recording medium and the lens to be re-maintained at the near field level.

Abstract: An optical pickup unit, an apparatus for recording/reproducing data, a control method, and a recording medium are disclosed. Each of the optical pickup unit and the recording/reproducing apparatus includes a near-field lens, and uses a high-refraction lens, conically shaped, to effectively use the near-field. Two lens units are required to be compatible with a conventional recording medium. The lens unit is designed in consideration of a distance between the recording medium and the lens, and the tilt or vibration of the lens units is controlled.

Abstract: The present invention provides a recording/reproducing method for a recording medium including a data recording layer and a user information recording layer, wherein the recording/reproducing method includes the steps of: receiving inputted user information; determining whether the inputted user information matches the user information recorded on the user information recording layer of the recording medium; and recording data onto the data recording layer of the recording medium, or reproducing data of the data recording layer, in accordance with the result of the determination.

Abstract: A tilt control method of a recording medium comprises fixing the recording medium to a recording reproducing apparatus; performing first tilt compensation in a state that the recording medium is stopped; and performing second tilt compensation in a state that the recording medium in which the first tilt compensation has been performed is rotated.

Abstract: A lens unit, an optical system, a recording/playback apparatus and a method for recording to and/or reproducing from a recording medium to compensate for a spherical aberration and perform stable recording or reproduction of data in recording or reproducing data to or from a recording medium having a plurality of recording layers are disclosed. The lens unit includes a first lens for condensing light beams outputted from a light source to a recording medium, a second lens for increasing a numerical aperture of the first lens to form a near field, and a liquid crystal device for compensating for a spherical aberration included in the first lens and the second lens, thereby compensating for the spherical aberration.

Abstract: There is provided an apparatus for recording/reproducing data on/from a recording medium including: a pickup unit including an objective lens and a solid immersion lens(SIL) to allow a light to be incident onto a recording medium; a photoelectric element for receiving the light reflected from the recording medium to output a controlling signal; and a controller to control the pickup unit using the controlling signal outputted from the photoelectric element, wherein the controlling signal includes a tilting error signal by skew of the recording medium.

Abstract: Disclosed are an apparatus and a method for controlling a tracking servo in a near field optics. Gap error signals are detected in a divided state, and a push pull signal is compensated based on the detected gap error signals. A photo detector detecting the gap error signals is divided into two areas such that movement of an image formed on the photo detector can be detected. The push pull signal is compensated by subtracting a value proportional to a difference value between the two gap error signals detected in the photo detector. The difference value between the two gap error signals is proportional to a dc offset component included in the push pull signal. Accordingly, it is possible to simply remove a dc offset included in a push pull signal without largely modifying the near field optics, so that it is possible to exactly perform a tracking servo operation.

Abstract: A recording/reproducing apparatus and a tracking control method which can perform data processing for reliably recording or reproducing data on or from a recording medium are disclosed. Tracking error signal (TE) is generated using difference signal (A?B) produced from reflected light from a recording medium and an offset included in the difference signal is compensated for using another reflected light received separately from the reflected light. Offset-compensated tracking error signal ((A?B)?k(C?D)) is obtained by subtracting another difference signal (C?D) produced from the separately received reflected light according to gain (k) from difference signal (A?B). Different gains may be used for areas on the recording medium having different reflectances. Thus, the tracking error signal can be compensated for an optical offset caused by lens movement and an offset caused by different reflectances and light radiated to the recording medium can accurately follow its track to perform reliable data processing.

Abstract: A data recording/reproducing method and apparatus which are capable of accurately and stably controlling a gap between a recording medium and a head of the data recording/reproducing apparatus are disclosed. The data recording/reproducing method includes: outputting at least one signal based on a light beam reflected from a recording medium; detecting a minimum value and a maximum value of the output signal; and adjusting a gap between a head of a data recording/reproducing apparatus and the recording medium according to the minimum value and the maximum value.

Abstract: A recording and/or playback apparatus and method and a method of moving tracks, and more particularly, an apparatus and method for efficiently seeking a track and recording and/or playback data on/from a recording medium, are disclosed. The method of moving tracks includes changing a gap between a lens part and a recording medium in correspondence with a distance of moving tracks when the lens moves from a current track to another track. Accordingly, it is possible to minimize or prevent the collision between the lens part and the recording medium and to efficiently seek the track to perform recording/reproduction when recording and/or playback data on/from the recording medium.

Abstract: A method of effectively determining a recording medium, a recording and reproducing method using the same, and a recording and reproducing apparatus using the same are disclosed. Since a narrow distance between a lens and the recording medium must be maintained in the recording and reproducing using a near field, the recording and reproducing apparatus further includes a focus adjuster to adjust a position where a light beam is focused. When a variation of a signal generated during the scanning of focuses is detected by adjusting the focus adjuster, it is possible to determine the recording medium.