Verfahren und Vorrichtung zur Anzeigerauschunterdrückung in einem Berührungserfassungssystem

Details

Veröffentlichungs-Nr.

EP4498212

Aktenzeichen

EP23306277

Anmeldetag

24. Juli 2023

Veröffentlichung

18. Februar 2026

Erteilung

18. Februar 2026

Rechtsraum

EP

IPC

G06F3/041

Abstract

A method for display noise canceling in a touch sensing system includes measuring a first feedback voltage of a feedback node resistively coupled to a line voltage of a capacitive touch panel, the line voltage formed by a continuous wave output of an amplifier responsive to a reference voltage difference between the first feedback voltage and a reference voltage. A second feedback voltage is clamped to a first upper voltage threshold in response to a first voltage difference between the first feedback voltage and the reference voltage being greater than the first upper voltage threshold. The second feedback voltage is clamped to a first lower voltage threshold in response to the first voltage difference being less than the first lower voltage threshold.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete