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:
Nov. 07, 1995
Filed:
Feb. 16, 1994
Applicant:
Inventors:
Atsushi Nishino, Neyagawa, JP;
Akihiko Yoshida, Hirakata, JP;
Teruo Namba, Tokyo, JP;
Masaaki Aoki, Tokyo, JP;
Atsushi Naito, Tokyo, JP;
Assignees:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
341 33 ; 200600 ; 324686 ;
Abstract
A touch sensor has an LC oscillator circuit 1, 2, 3, and 4, a rectification circuit 10 which rectifies outputs of the oscillator circuit 1, 2, 3, and 4, a voltage detection circuit 12, 13, 14, and 15 which detects the rectified voltage, and a sensor plate 8 connected to the input section of the rectification circuit, and detecting contact of a finger with the sensor plate 8 by enabling the voltage detection circuit 12, 13, 14, and 15 to detects a drop of equivalent impedance due to a finger touching the sensor plate 8 as a change of voltage.