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. 20, 1999
Filed:
Jul. 21, 1997
Yoshiaki Irie, Yokohama, JP;
Keisuke Aoyama, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A line of sight detection device detects a user's line of sight by illuminating an eyeball of a user, receiving light from the eyeball of the user, detecting a wink of the user, detecting a line of sight of the user based on a light receiving state of a light receiving means, changing at least one of an illuminating condition of an illuminating means and a light receiving condition of the light receiving means, and repeating a line of sight detecting operation based on the light receiving state of the light receiving means during the line of sight detecting operation, the line of sight detecting operation being repeated without changing the illuminating condition of the illuminating means and the light receiving condition of the light receiving means when a wink detection means detects a wink of the user during the line of sight detecting operation.