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. 10, 2023
Filed:
Aug. 11, 2021
Cambridge Touch Technologies Ltd., Cambridge, GB;
Michael Astley, Cambridge, GB;
Babak Bastani, Palo Alto, CA (US);
Riccardo Micci, Cambridge, GB;
Arokia Nathan, Cambridge, GB;
Paul Routley, Cambridge, GB;
Xiang Cheng, Cambridge, GB;
Jiahao Li, Cambridge, GB;
Cambridge Touch Technologies Ltd., Cambridge, GB;
Abstract
An apparatus () for processing signals from a touch panel () is described. The touch panel () includes a layer of piezoelectric material () disposed between a number of sensing electrodes () and at least one common electrode (). The apparatus () includes a capacitive touch controller () for connection to the sensing electrodes (). The apparatus () also includes a switch network () including a number of inputs for connection to some or all of the sensing electrodes (), and an output connected to system ground or a common mode voltage (V). The apparatus () also includes a second circuit () for connection to the at least one common electrode () and configured to generate, based on signals received from the at least one common electrode, a second pressure signal () indicative of a total pressure applied to the touch panel (). The apparatus () also includes a controller () configured to control the switch network () to couple any connected sensing electrodes () to system ground or the common mode voltage (V) during a pressure measurement period, and to determine an estimate of the total pressure based on the second pressure signal during the pressure measurement period.