Reducing floating ground effects in pixelated self-capacitance touch screens
US10289251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2014 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Jun 27, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96031
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch controller is disclosed. In some examples, the touch controller can include sense circuitry configured to be coupled to a first touch pixel and a second touch pixel on a touch sensor panel. In some examples, the sense circuitry can be configured to drive and sense the first touch pixel during a first time period while coupling the second touch pixel to a reference voltage. In some examples, the sense circuitry can be configured to drive and sense the second touch pixel during a second time period while coupling the first touch pixel to the reference voltage. In some examples, the reference voltage can be a system ground of the touch controller. In some examples, the sense circuitry can be configured to drive and sense pluralities of touch pixels in a similar manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.