The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2019
Filed:
Nov. 28, 2017
Linkelectronics Co., Ltd., Gyeonggi-do, KR;
YoungSoo Kim, Gyeonggi-do, KR;
Deokheon Kim, Gyeonggi-do, KR;
LINKELECTRONICS CO., LTD., Gyeonggi-Do, KR;
Abstract
A digital door lock system includes a receiving antenna matching unit configured to receive a power signal wirelessly transmitted from the wireless power transmitting device; a full-wave rectifying unit configured to convert a sinusoidal signal waveform outputted from the receiving antenna matching unit to one of constant polarity; a voltage regulating unit configured to stabilize a signal outputted from the full-wave rectifying unit; a secondary battery configured to supply a power in case of power outage; an excessive charging/discharging preventing unit configured to charge the secondary battery by a stabilized power of the voltage regulating unit and having an excessive charging/discharging preventing function; and a power supply unit configured to supply the power of the voltage regulating unit to the respective units of the system and to supply the power of the secondary battery to the respective units of the system in the case of power outage.