BASELINING TECHNIQUES IN FORCE-BASED TOUCH PANEL SYSTEMS
Application 2511/CHENP/2004 published 2007-07-20, filed 2004-11-08
In connection with establishing a touch location on a touch screen, a number of reference levels are developed. One or more of the reference levels may be used to determine a differential change in the touch signal between a zero touch force condition and a touch event. In one approach, one or more reference levels are selected to compensate for various conditions affecting the touch screen at the time a touch is applied. Using one or more reference levels to compensate for conditions affecting the touch signal at the time touch location information is obtained can provide improved accuracy in determining touch location.
Applicant
1)3M INNOVATIVE PROPERTIES COMPANY
:3M CENTER, P O BOX 33427, SAINT PAUL, MN 55133-3427, USA U.S.A.
Inventor
1)ROBERT, JERRY, B
International Info
Classification: G06K 11/16
Publication Number: WO 03/096267 A1
Application Date: 2003-03-24
Priority Information
10/142,118 U.S.A. 2002-05-08