Touch screen controller, touch sensing device, and touch sensing method
US10156935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2016 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Jul 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04101
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch screen controller is provided. The touch screen controller includes: an offset cancellation circuit configured to cancel offset capacitance of a touch screen panel including a first channel and a second channel crossing the first channel, the offset cancellation circuit connected to the touch screen panel through a sensing node; a charge amplifier configured to generate a sensing voltage from a sensing signal output from the touch screen panel, the charge amplifier including an amplifier having a first input terminal connected to the sensing node and a second input terminal to which an input voltage is applied; and a channel driver configured to provide a driving voltage, which is equal to or greater than the input voltage, to the second channel in a self capacitance sensing mode for the first channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.