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. 07, 2003
Filed:
Nov. 29, 1999
Akio Miyajima, Osaka, JP;
Tamotsu Yamamoto, Hyogo, JP;
Tsutomu Sakuma, Osaka, JP;
Akira Nakanishi, Osaka, JP;
Toyoshi Fukumura, Kyoto, JP;
Matsushita Electrical Industrial Co., Ltd., Osaka, JP;
Abstract
A touch type input device is used for various forms of control. A primary side line is connected to a power source, and a secondary side circuit ground through a power transformer are connected by an impedance element. Flat electrodes to be touched by a finger are formed on one side of an insulating base material, and are connected to a ground current detection circuit through a high resistor and a low pass filter. A control circuit for converting the output of the ground current detection circuit into a control signal for an electronic appliance, and a display unit are provided. Therefore, an input device having plural touch switches disposed on a base material in a free shape and layout can be obtained.