US 4,712,103 AGranted

Door lock control system

OwnerMotohiro Gotandainventor

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Abstract

A door lock control system including keys each having a memory storing information of the key number and the key owner's face as video data. When the key is inserted into the door lock, the face image is reproduced on a CRT according to the face information stored in the key. A TV camera also takes the face image of the key handling person for displaying same on another CRT so that one can judge, by comparison of the face images on CRT, whether the person is the same as the key owner. The system further includes a central storage unit in which a portion of the video data in each key is stored as a collation word. Upon insertion of the key into the door lock, the collation word is read out according to the information of the key number stored in the key. The read out word is compared with the portion of the video data stored in the key to check whether the key is one of those owned by the predetermined key owners.

A door lock control system comprising:

door lock means having a keyhole;
plurality of keys owned by respective predetermined key owners, assigned with respective predetermined key numbers, each adapted for insertion into the keyhole and each having a memory storing information of the owner's face as video data and information of the key number;
information storage means storing information of a predetermined portion of the video data stored in the memory of each of said keys and correlated to each key number;
processing means adapted for being electrically coupled to the memory of said key inserted into the keyhole and for reading out
(A) the information of the key owner's face stored in the memory of said key inserted into the keyhole,
(B) the information of the key number stored in the memory of said key inserted into the keyhole,
(C) selected one of the information of the predetermined portions of the video data stored in the information storage means according to the information (B) of the key number, and
(D) information of the predetermined portion of the video data stored in the memory of said key inserted into the keyhole;
the predetermined portion of the video data being video signals of a predetermined scan line of the video data;
verifying means coupled to the processing means to verify whether or not the information (C) read out from the information storage means by the processing means corresponds to the information (D) read out from the memory of the key by the processing means;
first display means coupled to the processing means for displaying said key owner's face according to the information (A) read out by the processing means;
a television camera disposed outside of the door for taking the face image of the person who has inserted said key into the keyhole;
and
second display means coupled to said television camera for displaying the face image of said person taken by said television camera, to permit comparison of the displayed face images of said first and second display means, and determination whether or not said person inserting the key is the same as the predetermined owner of said key and, from the verifying means a determination whether or not the key inserted into the keyhole is one of those owned by the predetermined key owners.

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Abstract

Claims3