Touch controller, operating method of the same, and touch sensing device including touch controller
US11960680B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2022 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Nov 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04166
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch controller includes a noise detection circuit that respectively provides a first reference voltage and a second reference voltage for detecting display noise to a first electrode and a second electrode arranged on lines except a line on which touch sensing is performed, among sensing electrodes, the second reference voltage being different from the first reference voltage, a driving signal generation circuit that receive a first noise voltage and a second noise voltage generated based on the first reference voltage and the second reference voltage and alternately selects the first noise voltage and the second noise voltage as a driving signal, and a receiving circuit that receives the driving signal, a touch sensing signal generated based on the driving signal from a third electrode arranged on the line on which touch sensing is performed, among the sensing electrodes, and generates a sensing voltage based on the touch sensing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.