INPUT DEVICE
First Claim
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1. An input device comprising:
- a plurality of X scan electrodes extending in a Y direction to be arranged with intervals in an X direction perpendicular to the Y direction;
a plurality of Y scan electrodes extending in the X direction to be arranged with intervals in the Y direction and insulated from the X scan electrodes;
detection electrodes forming electrostatic capacitance with the X scan electrodes and the Y scan electrodes;
an X driver supplying a pulsed driving signal to the X scan electrodes;
a Y driver supplying a pulsed driving signal to the Y scan electrodes; and
a detection unit detecting scan electrodes to be approached by a control object from detection signals to be obtained from the detection electrodes and the timing at which the driving signals are supplied to the X scan electrodes and the Y scan electrodes,wherein the driving signal that is supplied from the X driver to the X scan electrodes and the driving signal that is supplied from the Y driver to the Y scan electrodes are opposite in the timing of rising and falling of the pulses, and at the same scan time, one X scan electrode and one Y scan electrode are selected simultaneously and the driving signals are supplied to the selected X and Y scan electrodes, andwherein a predetermined number of repetitions of scan time be one cycle, and, in a first cycle, the same Y scan electrode is selected in all of the scan time and different X scan electrodes are selected at the respective scan time, and in a second cycle, a Y scan electrode different from the Y scan electrode in the first cycle is selected in all of the scan time and different X scan electrodes are selected at the respective scan time, andthe cycles where different Y scan electrodes are selected are repeated a predetermined number of times.
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Abstract
An input device includes a plurality of X scan electrodes, a plurality of Y scan electrodes, and common detection electrode forming capacitance with the X scan electrodes and the Y scan electrodes. In the cycles, a second driving signal is supplied to the same Y scan electrode, and in each of the cycles, a first driving signal is sequentially supplied to the X scan electrodes. Two positions touched by fingers are detected from detection current to be obtained by the detection electrodes.
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Citations
6 Claims
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1. An input device comprising:
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a plurality of X scan electrodes extending in a Y direction to be arranged with intervals in an X direction perpendicular to the Y direction; a plurality of Y scan electrodes extending in the X direction to be arranged with intervals in the Y direction and insulated from the X scan electrodes; detection electrodes forming electrostatic capacitance with the X scan electrodes and the Y scan electrodes; an X driver supplying a pulsed driving signal to the X scan electrodes; a Y driver supplying a pulsed driving signal to the Y scan electrodes; and a detection unit detecting scan electrodes to be approached by a control object from detection signals to be obtained from the detection electrodes and the timing at which the driving signals are supplied to the X scan electrodes and the Y scan electrodes, wherein the driving signal that is supplied from the X driver to the X scan electrodes and the driving signal that is supplied from the Y driver to the Y scan electrodes are opposite in the timing of rising and falling of the pulses, and at the same scan time, one X scan electrode and one Y scan electrode are selected simultaneously and the driving signals are supplied to the selected X and Y scan electrodes, and wherein a predetermined number of repetitions of scan time be one cycle, and, in a first cycle, the same Y scan electrode is selected in all of the scan time and different X scan electrodes are selected at the respective scan time, and in a second cycle, a Y scan electrode different from the Y scan electrode in the first cycle is selected in all of the scan time and different X scan electrodes are selected at the respective scan time, and the cycles where different Y scan electrodes are selected are repeated a predetermined number of times. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification