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:
Sep. 03, 1991
Filed:
Dec. 06, 1988
Per K Hansen, Burlington, VT (US);
Selectech, Ltd., South Burlington, VT (US);
Abstract
The present invention relates to an optical pointing device which preferably uses infrared light as a source and a camera as a detector. Movements of the camera with respect to the light source which remains fixed are sensed in the detector portion of the camera to determine the direction in which the camera is pointing with respect to, for example, a display screen adjacent the light source. The electronics included in the present invention are designed to act, responsive to sensing of the position of the camera with respect to the light source to cause corresponding movements of a cursor on the display screen. Other modes of operation of the present invention are also disclosed.