Abstract: The wireless charging device according to an embodiment may comprise a shielding assembly where a shield, a first coil for power transfer by magnetic inductive coupling, and a bracket are formed, an NFC coil fixed to the bracket, and a main PCB including an inverter that converts DC power into AC power and supplies it to the first coil. The bracket may be formed outside the first coil. The shielding assembly may further include a coil connector for connecting the first coil and the NFC coil to the main PCB. The coil connector may consist of a plurality of protruding pins, and the plurality of protruding pins may be inserted into holes formed at corresponding positions on the main PCB so that the first coil and the NFC coil are electrically connected to the main PCB.

Abstract: The wireless charging device according to an embodiment may comprise a rectangular shield assembly in which a shield and a first coil for delivering power to a terminal including a second coil by magnetic induction coupling are formed, a main PCB including an inverter that converts DC power into AC power and supplies it to the first coil, and a sub-PCB attached to one corner of the shield assembly and including a USB Type-C port. The sub-PCB may be disposed outside the first coil. The USB Type-C port may be exposed in a direction perpendicular to a plane on which the terminal is placed.

Abstract: This document relates to a method capable of reducing transfer errors of a sled motor for moving an optical pickup to the outer circumference when labels are recorded on a disc. An optical disc recording method may comprise checking a step pattern having a small transfer error in the sled motor, and recording labels on a label plane of an optical disc while driving the sled motor based on the checked step pattern. Step patterns can be classified based on a structure of the sled motor or a unit for driving the sled motor. The step patterns having a small transfer error can be detected in a process of manufacturing an optical disc apparatus and stored in memory of the optical disc apparatus.