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:
Mar. 16, 1993
Filed:
Aug. 26, 1991
Hiroshi Katayama, Higashihiroshima, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An optical type position detecting device comprising a light source, and a light-receiving element for detecting a light beam emitted by the light source, a region on the light-receiving element whereon the light beam is incident having parallel boundaries, the boundaries extending in directions substantially corresponding to directions of relative displacement of the region and the light-receiving element, the relative displacement accompanying a displacement of a body. The relative displacement can be detected by detecting a change in area of the region using the light-receiving element. A magnitude of displacement of the body is proportional to a change in output of the light-receiving element since, irrespective of where the displacement of the body begins from, a contstant width of the region is maintained along a direction perpendicular with respect to the direction of the relative displacement. In other words, the displacement of the body can be accurately detected since linearity is achieved between the two.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile