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:
Sep. 04, 2007
Filed:
Jul. 15, 2003
G. Samuel Hurst, Knoxville, TN (US);
R. H. Ritchie, Oak Ridge, TN (US);
Robert J. Warmack, Knoxville, TN (US);
Donald W. Bouldin, Brentwood, TN (US);
Joel C. Kent, Fremont, CA (US);
G. Samuel Hurst, Knoxville, TN (US);
R. H. Ritchie, Oak Ridge, TN (US);
Robert J. Warmack, Knoxville, TN (US);
Donald W. Bouldin, Brentwood, TN (US);
Joel C. Kent, Fremont, CA (US);
Tyco Electronics Corporation, Middletown, PA (US);
Abstract
A touch sensors with improved topological equivalence between an equipotential space and a Cartesian space to which the equipotential space will be mapped. The touch sensor comprises a substrate with a touch region, and a set of electrodes that are electrically coupled to the touch region. The touch sensor further comprises a plurality of resistive band segments that frames the touch region. The electrodes are located between the resistive band segments. Each resistive band segment has a resistivity that is intermediate between the resistivity of the electrodes and the resistivity of the touch region, thereby providing a transition between the low resistivity electrodes and the high resistivity touch region, and improving the topological equivalence within the corners of the touch region. At least one of the band segments has a non-uniform linear resistance to provide further improvement to the topological equivalence.