Samsung Electro-mechanics Co., Ltd.

Samsung Electronics Co., Ltd.

Sungkyunkwan University

Intellectual Discovery Co., Ltd.

Chul Wan Park

Jae Sun Lee

Jae Suk Sung

Ki Won Chang

Tae Jin Lee

Cheol-hoon Park

Sang-hoon Chu

Hyun Keun Lim

Yong-gwon Lee

Sung Soo Lee

Si Hyung Kim

Chang Soo Kang

Kwang-jo Jung

Ji Hyoung Ahn

Soon Tack Oh

Isaac Nam

Chang Min Han

Chang Yeong Oh

A camera module includes a housing having an internal space, a reflecting module including a reflecting member on a movable holder movably supported by an inner wall of the housing in the internal space, and a lens module disposed behind the reflecting module in the internal space, and including lenses aligned in an optical axis direction so that light reflected by the reflecting member is incident thereto. The movable holder is configured to move the reflecting member in a first axis direction approximately perpendicular to the optical axis direction and a second axis direction approximately perpendicular to the optical axis direction and the first axis direction with respect to the housing. The lens module includes at least two lens barrels disposed on sidewalls of the housing, linearly movable in approximately the optical axis direction, and including the lenses divided and disposed therein.

Camera module

Wireless network, access point, and terminal are disclosed. A method for determining a size of an access window performed in an access point in a wireless network may comprise estimating a number of terminals attempting to access uplink (hereafter, uplink access attempt terminals) in a first access window including at least one uplink slot which is allocated to the terminal or is randomly selected by the terminal so as to transmit uplink data; and determining a size of a second access window next to the first access window based on the estimated number of the uplink access attempt terminals.

Wireless network, access point, and terminal

A wireless power transmitter is electromagnetically coupleable to a receiving coil of a wireless power receiver to provide power wirelessly and includes a substantially planar transmitting core. A transmitting coil has a plurality of windings and is disposed on a surface of the transmitting core. The transmitting core may extend beyond the transmitting coil in a planar direction.

Wireless charging transmitter and wireless charging system using the same

A method for recognizing a tag in an environment where the same frequency band is in use and an NFC device for the same are provided. Depending on whether a radio channel is in use, the NFC device changes a first operation mode to a second operation mode, requests slot assignment for tag recognition at the second operation mode, and changes the second operation mode back to the first operation mode to perform a tag recognition process at an assigned slot.

Method for recognizing tag in environment using same frequency band and NFC device for the same

A coil device may be capable of varying the gap of a coil so that several devices may be wirelessly charged simultaneously or a single device may be wirelessly charged with concentrated power. The coil device may include: a case having a reception space and varying a charging area upon a user's selection; and a coil part, having, in the reception space of the case, a coil body formed of a wound conductor having a predetermined length. A gap of the wound conductor of the coil body varies as the charging area of the case varies.

Coil device, and wireless power transmitter and wireless power receiver having the same

A method of testing quality of a servo burst signal recorded on a hard disk drive and a recording medium adapted therefor, the hard disk drive including a plurality of sectors within one track and the burst signals for servo control recorded radially on each sector. The method includes: detecting peak positions at a radial position in which amplitudes of the recorded burst signals peak respectively on each track; comparing the detected peak positions of the burst signals on each track; detecting peak position error count, the peak position error count being a number of tracks in which offset of the detected peak positions exceed an offset limit within a predetermined number of tracks; and if the peak position error count exceeds the offset limit, determining a write quality of the servo burst signal to be low. A servo burst signal recorded with uniform intensity and a servo burst signal recorded with shift from normal position can be detected. Therefore, the quality of a servo burst signal can be managed efficiently.

Method of testing servo burst signals of hard disk drive and recording medium adapted therefor

For unlatching a head within a data storage device, such as a HDD (hard disc drive), a VCM (voice coil motor) amplifier with a switch is used for applying at least one cycle of an acceleration current pulse to a voice coil motor (VCM) for unlatching the head during an acceleration time zone. An analog to digital converter samples a characteristic of the VCM for indicating a speed of the head during the acceleration time zone. An unlatch controller terminates the acceleration time zone when the speed of the head is higher than a threshold speed, for more stable operation of the head but with guarantee of unlatching, regardless of the latch force within the HDD.

Apparatus and method for unlatching a head within a data storage device

Growing community of inventors

Suwon-si, South Korea

Chul Wan Park