Enhanced mutual capacitance touch screen display with noise compensation and methods for use therewith
US11269455B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2021 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Jan 28, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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; identifying noise in the capacitance image data based on the positive capacitance variation data and the negative capacitance variation data; determining, based on the noise, an upper threshold and a lower threshold; generating compensated capacitance image data, based on the upper threshold and the lower threshold, to compensate for the noise in the capacitance image data; and processing the compensated capacitance image data to determine a proximal condition of the touch screen display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.