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. 11, 2003
Filed:
Jan. 20, 2000
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/00 ; G09G 5/08 ;
U.S. Cl.
CPC ...
G09G 5/00 ; G09G 5/08 ;
Abstract
A coordinates input device comprises, two optical units which emit a light flux onto a panel and also receive the light flux. The coordinates input device then calculates the coordinates of an obstacle in the light flux on the panel based on the result of light flux detection in the optical units and the dimensions of the panel. The coordinates input device further comprises a sound-wave generator and a sound-wave detector for measuring the dimensions, used in the calculation of the coordinates, of the panel.