TOUCH PANEL
First Claim
1. A capacitive touch panel, comprising:
- a plurality of scanning electrodes arranged in a first direction;
a plurality of detecting electrodes arranged in a second direction crossing the first direction;
a scanning circuit portion for dividing one detection period, in which a drive voltage is input to one scanning electrode of the plurality of scanning electrodes, into n sub detection periods, where n≧
2, and inputting the drive voltage sequentially to the one scanning electrode in the sub detection periods 1 to n;
a capacitance detection circuit portion which detects a capacitance detection signal of each detecting electrode in a group of groups 1 to n, into which are divided the plurality of detecting electrodes so that at least one same detecting electrode is included in adjacent groups in the groups 1 to n, at the corresponding sub detection periods in the sub detection periods 1 to n; and
a control circuit portion for calculating a capacitance detection signal change amount from the capacitance detection signal detected by the capacitance detection circuit portion, and calculating coordinates of a touch position based on the calculated capacitance detection signal change amount,wherein the control circuit portion determines, in consecutive sub detection periods, the capacitance detection signal change amount of the each detecting electrode in two groups from which the capacitance detection signals are detected in the consecutive sub detection periods, based on the capacitance detection signals consecutively detected from the at least one same detecting electrode.
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Accused Products
Abstract
A capacitive touch panel includes a scanning circuit portion for inputting a drive voltage to each scanning electrode sequentially in 1st to n-th sub detection periods, a capacitance detection circuit portion for detecting a capacitance detection signal of the each detecting electrode in the 1st to n-th groups, and a control circuit portion for calculating a capacitance detection signal change amount from the capacitance detection signals of a plurality of the detecting electrodes detected by the capacitance detection circuit portion, and calculating coordinates of a touch position based on the capacitance detection signal change amounts. The control circuit portion determines, in consecutive sub detection periods, the capacitance detection signal change amount of the each detecting electrode in two groups from which the capacitance detection signals are detected in the consecutive sub detection periods, based on the capacitance detection signals consecutively detected from at least one same detecting electrode.
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Citations
13 Claims
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1. A capacitive touch panel, comprising:
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a plurality of scanning electrodes arranged in a first direction; a plurality of detecting electrodes arranged in a second direction crossing the first direction; a scanning circuit portion for dividing one detection period, in which a drive voltage is input to one scanning electrode of the plurality of scanning electrodes, into n sub detection periods, where n≧
2, and inputting the drive voltage sequentially to the one scanning electrode in the sub detection periods 1 to n;a capacitance detection circuit portion which detects a capacitance detection signal of each detecting electrode in a group of groups 1 to n, into which are divided the plurality of detecting electrodes so that at least one same detecting electrode is included in adjacent groups in the groups 1 to n, at the corresponding sub detection periods in the sub detection periods 1 to n; and a control circuit portion for calculating a capacitance detection signal change amount from the capacitance detection signal detected by the capacitance detection circuit portion, and calculating coordinates of a touch position based on the calculated capacitance detection signal change amount, wherein the control circuit portion determines, in consecutive sub detection periods, the capacitance detection signal change amount of the each detecting electrode in two groups from which the capacitance detection signals are detected in the consecutive sub detection periods, based on the capacitance detection signals consecutively detected from the at least one same detecting electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification