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:
Jun. 11, 2002
Filed:
Jun. 21, 1999
Applicant:
Inventors:
Philippe Coni, Saint Jean d'Illac, FR;
Pierre Fagard, Elancourt, FR;
Assignee:
Sextant Avionique, Velizy Villacoublay, FR;
Primary Examiner:
Int. Cl.
CPC ...
H03K 1/794 ; H03M 1/100 ;
U.S. Cl.
CPC ...
H03K 1/794 ; H03M 1/100 ;
Abstract
A process for detecting the point of touching of a tactile surface. A high frequency signal is sequentially supplied to four corners of a plate having a capacitive surface. This is accomplished by supplying one diagonal with the others being idle. The output voltages are measured at the four corners for all the various possible positions of touching. Relations between voltages are established from these measurements obtained for each diagonal. During touching, the relations obtained are compared with those stored in order to locate the point of touching.