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:
Feb. 05, 2002
Filed:
Feb. 09, 1999
Yasuhiko Nitta, Tokyo, JP;
Jun-ichi Kondo, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In an automatic door system and a method for controlling an automatic door, the automatic door is not opened when a passerby just passes by the door. A data processing device ( ) produces a differential image by subtracting an initial image from a detected image on the basis of digital data entered from a subtractor ( ), and judges whether a gray-scale shadow is in the differential image or not. When a gray-scale shadow appears in the differential image, the data processing device ( ) calculates the maximum width (X ) of the gray-scale shadow in the X direction to compare it with a predetermined threshold value (X ). When the maximum width (X ) is equal to the threshold value (X ) or more, the data processing device ( ) judges that a passerby faces toward an automatic door ( ), and outputs a driving control signal (C) for opening the automatic door ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile