Method and apparatus for determining control parameters of cancellation branch, and touch control detection apparatus
US10852888B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2019 |
| Grant date | Dec 1, 2020 |
| Priority date | — |
| Expiry date | May 24, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/044
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for determining a control parameter of a cancellation branch, and a touch control detection apparatus are provided. The method includes: inputting a first constant signal to the cancellation branch, and inputting a first excitation signal to a self-capacitance detection branch, and performs differential processing for an output signal to obtain a first output signal; determining, based on the first output signal, a sum of phase delays; inputting a second constant signal to the self-capacitance detection branch, and inputting a second excitation signal to the cancellation branch, and performs differential processing for the output signal to obtain a second output signal; determining, based on the second output signal, a phase delay; and determining the control parameter of the cancellation branch based on the sum of phase delays and the phase delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.