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. 06, 1998
Filed:
Dec. 15, 1995
Masanori Ogino, Yokohama, JP;
Keiichiro Tanaka, Yokohama, JP;
Tetsuo Iwamoto, Tokorozawa, JP;
Kousyu Ichikawa, Yokohama, JP;
Hideyuki Fuma, Fujisawq, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A large screen display comprising an image signal source such as a computer, an original image generator, a light-transmission screen, an on-screen pointing-position detecting means, and a light-pen built in an infra-red-ray emitting modulating means, wherein infra-red rays which are modulated by pressing force generated when the light-pen is pressed against the screen by an operator are emitted and the infrared rays are detected and amplified by an infrared-ray detector and demodulated by a demodulating means and then inputted to the image signal source, so that the tone and thickness of each stroke of a figure to be drawn and displayed can be displayed.