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:
May. 05, 2009
Filed:
Dec. 08, 2004
Satoshi Sakurai, Shinagawa, JP;
Nobuo Yatsu, Shinagawa, JP;
Keita Harada, Shinagawa, JP;
Fujitsu Component Limited, Tokyo, JP;
Abstract
An input device includes an input pen that is capable of detecting an amount of a pen pressure applied to a pen tip. The input pen has a resistance film that alters a resistance vale thereof according to a touch area, a spring that alters the touch area between the spring and the resistance film, a pen pressure detecting circuit that detects the amount of the pen pressure applied to the pen tip based on the touch area, and an infrared output circuit that outputs the amount of the pen pressure to a receiver with the use of infrared rays. The spiral-shaped spring is configured so that a diameter may become smaller as further from the pen tip. It is thus possible to detect the amount of the pen pressure applied to the pen tip based on the touch area that varies according to a movement of the pen tip, and thereby possible to express different line widths in drawing according to the amount of the pen pressure applied to the pen tip.