Patent · US Expired

Method for capacitive image acquisition

US6365888B2 · kind B2 · utility

4Cited by

2References

3Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Paul-Werner von Basse · Wolfratshausen, DE
Josef Willer · Riemerling, DE
Thomas Scheiter · Munich, DE
Stephan Marksteiner · Putzbrunn, DE

Key dates

Filing date	Feb 13, 2001
Grant date	Apr 2, 2002
Priority date	—
Expiry date	Feb 13, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG06V40/1306
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A grid-shaped array of conductor areas is used for capacitive image acquisition. Shielding conductors are disposed in each case between the conductors that are provided for measurement. During a plurality of charging and discharging cycles, the potential is always carried along on the conductors belonging to a respective pixel in order to prevent displacement currents between the shielding capacitors. By way of example, a compensation line with a feedback operational amplifier can be used for identically altering the electrical potentials on the conductors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.