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:
Dec. 29, 2009
Filed:
Feb. 13, 2007
Applicant:
Shoji Yamada, Konan, JP;
Inventor:
Shoji Yamada, Konan, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B 3/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A technique is disclosed of tracking a position of a pupil of a viewer's eyeball, by directing light toward the eyeball and using a portion of the light reflected from the eyeball. In the technique, the detection is performed of the intensity of a reflected light beam which is a portion of a light beam entering the eyeball which is reflected therefrom. An intensity signal indicative of the intensity of the reflected light beam is produced. The pupil position is tracked based on intensity changes of the reflected light beam represented by the intensity signal.