| 摘要 |
PURPOSE: A digital door lock is provided to enable a user to open the digital door lock by rapidly recognizing a smart key without an error by preventing communication collision between the smart keys and the digital door lock. CONSTITUTION: A low frequency antenna(102) transmits a low frequency signal to a portable individual identification unit. A wireless frequency antenna(112) receives a wireless frequency signal from the portable individual identification unit. An operation mode setting unit(306) sets an operation mode of a digital door lock to an automatic mode or manual mode. A driving motor(308) drives a dead bolt under the control of the controller.
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