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. 17, 2021
Filed:
Mar. 26, 2020
Seiko Epson Corporation, Tokyo, JP;
Makoto Otani, Matsumoto, JP;
Akira Ikeda, Chino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A position detection method of detecting a position of a pointing element with respect to an operation surface includes: obtaining a first taken image by imaging the pointing element with the operation surface as a background using a monocular camera while performing illumination with a first illumination section without performing the illumination with a second illumination section at a position different from a position of the first illumination section; obtaining a second taken image by imaging the pointing element with the operation surface as the background using the camera while performing the illumination with the second illumination section without performing the illumination with the first illumination section; extracting pointing element and shadow areas from the first taken image and the second taken image; detecting a position of the pointing element with respect to the operation surface using a relationship between the pointing element area and the shadow area.