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:
Aug. 04, 2015
Filed:
Sep. 20, 2010
Daisuke Nakanishi, Matsumoto, JP;
Daisuke Nakanishi, Matsumoto, JP;
Seiko Epson Corporation, , JP;
Abstract
A position detecting function-added projection display apparatus that optically detects a position of a target object positioned in a forward space in which an image is projected from an image projecting device, includes: a position detecting light source unit that forms a distribution of intensities of position detecting light in the forward space by emitting the position detecting light into the forward space; a plurality of photodetectors that are disposed in the image projecting device and have ranges of incident angles in directions of angles different from each other when the forward space is viewed from the image projecting device; and a position detecting unit that detects the position of the target object based on results of detection of the position detecting light reflected by the target object by using the photodetectors.