Touch-screen interface circuit
US9652106B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2009 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Sep 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch-screen interface circuit configured to operate in at least three modes comprises a first resistive x-plate having at least a first x-terminal connected in the first mode to a voltage supply and a second x-terminal connected in first mode to circuit ground; a voltage regulator circuit comprising a floating reference voltage source connected in first mode to the second x-terminal, and to a first input of a touch-screen reference buffer circuit having a second input connected in first mode to the first x-terminal; the voltage regulator circuit arranged to control in first mode a connection between the voltage supply and the first x-terminal; and a second resistive y-plate having at least a first y-terminal and being arranged to apply a wiper contact to the first x-plate, the wiper contact having an x-position, y-position and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.