Capacitive sensing using a segmented common voltage electrode of a display
US8643624B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2010 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Aug 24, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An integrated display and touch sensor device comprises a plurality of display pixels and a processing system communicatively coupled with a plurality of common voltage electrode segments and with a plurality of receiver sensor electrodes. The plurality of display pixels is configured for displaying information on the display. The processing system is configured for driving a voltage transition onto a common voltage electrode segment of the plurality of common voltage electrode segments. The voltage transition provides a common voltage for refreshing at least one display pixel of the plurality of display pixels, and generates a first electrical signal on at least one receiver sensor electrode of the plurality of receiver sensor electrodes. The processing system is also configured for acquiring a first measurement of a capacitive coupling between the driven common voltage electrode segment and the at least one receiver sensor electrode by measuring the first electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.