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:
Oct. 07, 2014
Filed:
Mar. 27, 2013
Katsuyuki Omura, Tokyo, JP;
Katsuyuki Omura, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A display apparatus includes a pointing device including a light emitting unit and a light receiving unit to detect a position of an object inserted into an optical path between the light emitting unit and a light receiving unit, wherein the pointing device includes an optical intensity store unit configured to store an optical intensity distribution detected by the light receiving unit in a memory unit upon detection of a change in a position or location of a display, and a position calculating unit configured to detect the position of the object by detecting a dark point in the optical intensity distribution caused by the insertion of the object based on a difference between the optical intensity distribution stored in the memory unit and an optical intensity distribution subsequently detected by the light receiving unit.