Touch screen device
US8373671B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Oct 4, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04166
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Touch positions can be detected with a high accuracy. A receiver receives a charge-discharge current signal of a receiving electrode in response to a drive (pulse) signal applied to a transmission electrode, and outputs a level signal of each electrode intersection. The receiver includes an IV converter that converts the charge-discharge current signal to a voltage signal. A conversion characteristic of the IV converter is set such that phases of amplitude of the voltage signal corresponding to a leading edge and a trailing edge of a pulse wave of the drive signal substantially match each other, and phases of amplitude of the voltage signal corresponding to the trailing edge of the pulse wave and a leading edge of a succeeding pulse wave substantially match each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.