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:
Dec. 29, 1998
Filed:
Nov. 06, 1996
Applicant:
Inventors:
Josef C Frisch, Belmont, CA (US);
Gregory E Leyh, Brisbane, CA (US);
John C Platt, Fremont, CA (US);
Timothy P Allen, Los Gatos, CA (US);
Richard R Schediwy, Union City, CA (US);
Federico Faggin, Los Altos Hills, CA (US);
Assignee:
Synaptics, Incorporated, San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
345173 ; 345174 ; 178 1803 ; 178 1806 ;
Abstract
A force sensing touchpad comprises a substantially rigid touch surface; a substantially rigid frame; a plurality of spring structures formed integrally with the touch surface and mechanically connected to the reference frame; and a circuit for deriving force information from capacitances proportional to the distances between predetermined portions of the touch surface and portions of the frame in response to a force applied to the touch surfaces.
Published as: