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:
May. 08, 1990
Filed:
Sep. 09, 1988
Applicant:
Inventor:
Isao Sasao, Inazawa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ; H04N / ;
U.S. Cl.
CPC ...
364550 ; 358108 ; 34082506 ; 362276 ; 315151 ; 187130 ; 187131 ;
Abstract
An apparatus detects the degree of crowding in an elevator hall utilizing a television camera to provide video signals which are stored as video data and including an illumination controller which controls the brightness of an illuminator for the elevator hall when the difference between reference data and video data has exceeded a predetermined value and has continued for a predetermined time, so that the difference between the reference data and the video data may fall within the predetermined value.