TOUCH SCREEN SYSTEM AND METHOD OF DRIVING THE SAME
First Claim
1. A touch screen system comprising:
- a touch screen panel comprising a plurality of first lines, a plurality of second lines crossing the first lines, and a plurality of sensing cells formed at crossing regions of the first lines and the second lines;
a driving circuit for sequentially applying a driving signal to the first lines;
a first sensing circuit for receiving capacitance change information sensed by the first lines, and generating a first sensing signal corresponding to the capacitance change information;
a selecting unit for selectively coupling the first lines to the driving circuit or the first sensing circuit;
a second sensing circuit for receiving the capacitance change information sensed by the sensing cells from the second lines, and generating a second sensing signal corresponding to the capacitance change information; and
a processing unit for receiving a sensing signal from the first sensing circuit and/or the second sensing circuit, and determining a detected touch position.
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Accused Products
Abstract
A touch screen system includes a touch screen panel including first lines, second lines crossing the first lines, a plurality of sensing cells formed at the crossing regions between the first lines and the second lines, a driving circuit for sequentially applying a driving signal to the first lines, a first sensing circuit for receiving capacitance change information sensed by the first lines, and generating a first sensing signal corresponding to the capacitance change information, a selecting unit for selectively coupling the first lines to the driving circuit or the first sensing circuit, a second sensing circuit for receiving the capacitance change information sensed by the sensing cells from the second lines and generating a second sensing signal corresponding to the capacitance change information, and a processing unit for receiving a sensing signal from the first sensing circuit and/or the second sensing circuit and determining a detected touch position.
44 Citations
20 Claims
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1. A touch screen system comprising:
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a touch screen panel comprising a plurality of first lines, a plurality of second lines crossing the first lines, and a plurality of sensing cells formed at crossing regions of the first lines and the second lines; a driving circuit for sequentially applying a driving signal to the first lines; a first sensing circuit for receiving capacitance change information sensed by the first lines, and generating a first sensing signal corresponding to the capacitance change information; a selecting unit for selectively coupling the first lines to the driving circuit or the first sensing circuit; a second sensing circuit for receiving the capacitance change information sensed by the sensing cells from the second lines, and generating a second sensing signal corresponding to the capacitance change information; and a processing unit for receiving a sensing signal from the first sensing circuit and/or the second sensing circuit, and determining a detected touch position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of driving a touch screen system comprising a plurality of first lines, a plurality of second lines crossing the first lines, and a plurality of sensing cells formed at crossing regions of the first lines and the second lines, the method comprising:
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sequentially applying a driving signal provided by a driving circuit to the plurality of first lines; coupling the first lines, excluding a first line to which the driving signal is applied, to a first sensing circuit or a ground power source; outputting first capacitance change information sensed by a sensing cell among the sensing cells to a corresponding one of the second lines coupled to the sensing cell when a finger contacts the sensing cell corresponding to the first line to which the driving signal is applied, and generating a sensing signal corresponding to the first capacitance change information; and outputting second capacitance change information sensed by another one of the first lines and another one of the second lines coupled to another one of the sensing cells when an active stylus contacts or approaches the another sensing cell corresponding to the another first line coupled to the first sensing circuit, and generating another sensing signal corresponding to the second capacitance change information. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification