公开(公告)号：US20170123486A1

公开(公告)日：2017-05-04

申请号：US15341794

申请日：2016-11-02

Applicant: CIRQUE CORPORATION

Inventor： David Willis ,  Paul Vincent ,  Brent Quist ,  Wayne Liu ,  Eric Gibson

IPC: G06F1/32 ,  G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F1/3262 ,  G06F3/044

Abstract: A system and method for reducing the power required for a capacitive sensing measurement and for simplifying a sample capacitor signal offset while reducing charge injection during synchronous rectification by enabling the touch sensor to begin a measurement cycle at an arbitrary voltage rather than forcing the touch sensor to have a precise known voltage.

公开(公告)号：US20170123578A1

公开(公告)日：2017-05-04

申请号：US15339092

申请日：2016-10-31

Applicant: CIRQUE CORPORATION

Inventor： Jared G. Bytheway ,  Keith L. Paulsen ,  Brent Quist ,  Paul Vincent

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416 ,  G06F3/0418

Abstract: A system and method for injecting a signal on a sense electrode in order to increase the security of the touch sensor if signals are capable of being intercepted by a probe, the injected signals being capable of creating a signal on the sense electrode that replicates the signal of an actual finger, creating a signal on a sense electrode that is equal to but opposite of an actual finger in order to cancel out the signal from the actual finger and therefore hide its presence, and create a pseudo random signal on sense electrodes so that it is difficult to correlate measurable signals on sense electrodes to actual finger position.

公开(公告)号：US10175837B2

公开(公告)日：2019-01-08

申请号：US15339092

申请日：2016-10-31

Applicant: CIRQUE CORPORATION

Inventor： Jared G. Bytheway ,  Keith L. Paulsen ,  Brent Quist ,  Paul Vincent

IPC: G06F3/041 ,  G06F3/044

Abstract: A system and method for injecting a signal on a sense electrode in order to increase the security of the touch sensor if signals are capable of being intercepted by a probe, the injected signals being capable of creating a signal on the sense electrode that replicates the signal of an actual finger, creating a signal on a sense electrode that is equal to but opposite of an actual finger in order to cancel out the signal from the actual finger and therefore hide its presence, and create a pseudo random signal on sense electrodes so that it is difficult to correlate measurable signals on sense electrodes to actual finger position.