Patent · US Active

Compensation method for an induced amount in a touch sensor and touch panel thereof

US10534476B2 · kind B2 · utility

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18Claims

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Assignee

PIXART IMAGING INC. · TW

Inventors

Sung-Han Wu · Baoshan, TW
Ming-Hung Tsai · Taipei, TW
Che-Chia Hsu · Jinshanmian, TW

Key dates

Filing date	Sep 28, 2017
Grant date	Jan 14, 2020
Priority date	—
Expiry date	Apr 20, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG06F2203/04111
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A compensation method for an induced amount in a touch sensor and a touch panel thereof are provided. The compensation method uses a fake finger circuit to simulate the situations when a user touches the sensing nodes of the touch sensor with a finger, and obtains the gain coefficient of each of the sensing nodes, which are used to compensate for the induced capacitance generated by the sensing nodes as a result of being touched by an external object. In this way, the extra effects caused by the difference in basic capacitance can be eliminated by the gain coefficient.

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