US 2015/0091845 A1 · CAPACITANCE SENSING DEVICE

Abstract

A capacitance sensing device includes a panel unit including first electrodes arranged in columns extending in a first direction, and second electrodes arranged in rows extending in a second direction intersecting the first direction; a driving circuit unit applying driving signals to the first electrodes arranged in the columns, wherein levels of driving signals applied to first electrodes in a part of the columns are different from levels of driving signals applied to first electrodes in the other columns; a sensing circuit unit sensing a change in capacitance from the second electrodes arranged in the rows; a variable gain controller adjusting levels of signals output from the sensing circuit unit to be same; an analog-to-digital converter (ADC) converting analog signals output from the variable gain controller into digital signals; and an operation unit detecting a touch made by a user based on an output from the ADC.

Claims10

Dependent claims

A capacitance sensing device, comprising:

a panel unit including first electrodes arranged in a plurality of columns extending in a first direction, and second electrodes arranged in a plurality of rows extending in a second direction intersecting the first direction;
a driving circuit unit applying a plurality of driving signals to the first electrodes arranged in the plurality of columns, wherein levels of driving signals applied to first electrodes in a part of the columns are different from levels of driving signals applied to first electrodes in the other columns;
a sensing circuit unit sensing a change in capacitance from the second electrodes arranged in the plurality of rows;
a variable gain controller adjusting levels of signals output from the sensing circuit unit to be the same;
an analog-to-digital converter (ADC) converting analog signals output from the variable gain controller into digital signals;
and
an operation unit detecting a touch made by a user based on an output from the ADC.

4 more elements

Dependencies are inferred from the claim text.

Capacitance sensing device

Life of this patent

Capacitance sensing device

Life of this patent

Abstract

Claims10