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. 14, 2006
Filed:
Dec. 29, 2004
Tadashi Osaka, Kashiwa, JP;
Takashi Yoshida, Minori, JP;
Kazushi Yoshida, Chiyoda, JP;
Ryoko Ichinose, Tsukuba, JP;
Tadashi Osaka, Kashiwa, JP;
Takashi Yoshida, Minori, JP;
Kazushi Yoshida, Chiyoda, JP;
Ryoko Ichinose, Tsukuba, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An approach position input device includes a plurality of antennas arranged in the form of a lattice. An oscillator applies a high-frequency ac voltage to the antennas. A signal processing circuit processes signals from the antennas. A change-over switch including switching elements sequentially changes over a connection between the antennas and the signal processing circuit. CPU sends a selection signal to the change-over switch for antenna selection. CPU calculates an approach position of a human body according to signals from the signal processing circuit. CPU instructs the change-over switch to apply the ac voltage from the oscillator only to the antenna selected according to the selection signal.