Sarah M Derichs

US Patent:

20230028217, Jan 26, 2023

Filed:

Sep 23, 2022

Appl. No.:

17/934659

Inventors:

- Wilmington DE, US
Michael Shawn Gray - Elgin TX, US
Daniel Keith Van Ostrand - Leander TX, US
Hans Howard Eilers - Leander TX, US
Kevin Joseph Derichs - Buda TX, US
Sarah Marie Derichs - Buda TX, US
Patrick Troy Gray - Cedar Park TX, US
Phuong Huynh - Fairfax VA, US

Assignee:

SigmaSense, LLC. - Wilmington DE

International Classification:

G06F 3/041
G06F 3/044

Abstract:

A capacitive touch screen display operates by: receiving a plurality of sensed signals indicating variations in mutual capacitance associated with a plurality of cross points formed by a plurality of electrodes; generating capacitance image data associated with the plurality of cross points that includes positive capacitance variation data corresponding to positive variations of the capacitance image data from a nominal value and negative capacitance variation data corresponding to negative variations of the capacitance image data from the nominal value; determining, based on the positive capacitance variation data and the negative capacitance variation data, an upper threshold and a lower threshold; generating compensated capacitance image data, based on the upper threshold and the lower threshold, to compensate for noise in the capacitance image data; and processing the compensated capacitance image data to determine a proximal condition of the touch screen display.