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:
Jan. 12, 2016
Filed:
May. 17, 2012
James Robert Karamath, Morelos, MX;
Christopher James Brown, Oxford, GB;
Sergio Garcia Castillo, Oxford, GB;
Harry Garth Walton, Oxford, GB;
James Robert Karamath, Morelos, MX;
Christopher James Brown, Oxford, GB;
Sergio Garcia Castillo, Oxford, GB;
Harry Garth Walton, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A tactile feedback actuator includes a first electrode and a second electrode separated by a gap, and a surface layer above the first and second electrodes. The first electrode receives a first stimulus voltage at a first frequency and the second electrode receives a second stimulus voltage at a second frequency, and the first and second electrodes superimpose the first and second stimulus voltages to generate a total voltage that has a beat frequency less than a perception threshold frequency. An object in contact with a portion of the surface layer is caused to vibrate at the beat frequency. The first electrode and the second electrode may constitute an electrode array including a plurality of column electrode segments, and a plurality of row electrode segments. An object in contact with a portion of the surface layer above one or more electrode segments is caused to vibrate at the beat frequency.