| 摘要 |
<p>According to the present invention, a door lock includes: an output part outputting a sound corresponding to the manipulation of a user for the door lock; an RFID processing part receiving information, transmitted from an RFID card, by wirelessly transmitting power by applying a clock voltage (Vc) to an antenna, and monitoring a change of the clock voltage (Vc); and a microcomputer part recognizing that the body of the user touches the RFID processing part when the clock voltage (Vc) is reduced below a reference voltage (Va), and then setting a silent mode for blocking the sound output of the door lock.</p> |
