Touch detection on an ungrounded pen enabled device
US10678348B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2018 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | May 8, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for touch detection on an ungrounded pen enabled device includes sampling output in a frequency range of a signal emitted from a stylus over a stylus sampling window, detecting touch input from a finger or hand based on detecting a gain between a touch threshold and a stylus threshold, wherein the touch threshold is below the stylus threshold over at least two consecutive columns and two consecutive rows of the sensor and reporting coordinates of the touch input based on detecting the touch input. Stylus input is detected based on detecting a gain above a stylus threshold in at least one column and one row of the sensor and coordinates of the stylus are reported based on stylus input being detected. Sampling is performed simultaneously from both columns and rows of a grid based capacitive sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.