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:
Oct. 07, 2014
Filed:
Jan. 07, 2011
Paul Nickson, Newtown, GB;
Arshad Suhail Farooqui, Westberkshire, GB;
Lee Coleman, Kintbury, GB;
Muhammad Umair, Santa Clara, CA (US);
Roberto Alini, Dublin, CA (US);
Paul Nickson, Newtown, GB;
Arshad Suhail Farooqui, Westberkshire, GB;
Lee Coleman, Kintbury, GB;
Muhammad Umair, Santa Clara, CA (US);
Roberto Alini, Dublin, CA (US);
Maxim Integrated Products, Inc., San Jose, CA (US);
Abstract
Transducers formed as part of a touchscreen system emulate the motion of a pushbutton or other mechanical elements. A touchscreen system positions a transducer adjacent to an icon displayed on the touchscreen surface. When a user touches the icon, the transducer senses the touch and is then deformed in a pattern that emulates a mechanical motion, giving the user the sensation of touching a mechanical button. An excitation signal applied to the transducer is compared to a target excitation signal that, when applied to the transducer, causes the transducer to emulate the desired motion. When any differences between the two signals are detected, the excitation signal is adjusted so that the motion is corrected. The target excitation signal, or time and voltage segments defining it, are stored in memory and retrieved for comparison. The excitation signal is also selected to reduce any acoustic artifacts that can cause the transducer to generate audible clicks.