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:
Jan. 25, 2005
Filed:
Aug. 09, 2000
Masahide Hasegawa, Yokohama, JP;
Kiwamu Kobayashi, Yokohama, JP;
Masaaki Kanashiki, Yokohama, JP;
Atsushi Tanaka, Yamato, JP;
Yuichiro Yoshimura, Kamakura, JP;
Katsuyuki Kobayashi, Yokohama, JP;
Masahide Hasegawa, Yokohama, JP;
Kiwamu Kobayashi, Yokohama, JP;
Masaaki Kanashiki, Yokohama, JP;
Atsushi Tanaka, Yamato, JP;
Yuichiro Yoshimura, Kamakura, JP;
Katsuyuki Kobayashi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A device has a projection type image display unit which has a projection lens and generates a coordinate input screen, and linear sensors for sensing an image of a beam spot, and computes a coordinate value corresponding to the beam spot on the basis of information obtained by the projection type image display unit and the output signals from the linear sensors. This beam spot is generated by irradiating the predetermined position on the coordinate input screen with light coming from a pointing tool, or corresponds to a light-emitting portion provided to the distal end of the pointing tool located near the coordinate input screen.