TOUCH-TYPE INPUT DEVICE
First Claim
1. A touch-type input device comprising:
- a plurality of sensor electrodes arranged in a first coordinate axis direction, each of which is configured such that its electrostatic capacitance changes according to the circumstances of how a user touches the sensor electrodes;
a capacitance detection circuit configured to measure the electrostatic capacitances of the plurality of sensor electrodes, and to generate a first data array containing capacitance value data which represents the electrostatic capacitances thus measured;
a peak detection unit configured to scan the first data array, to identify the sensor electrode which exhibits the largest capacitance value, and to generate first peak data which represents the sensor electrode thus identified; and
a computation processing unit configured to reduce the value of the capacitance data of each sensor electrode arranged in a range within the capacitance data contained in the first data array so as to generate a second data array, with the range having been selected using the sensor electrode indicated by the first peak data as a reference,wherein the peak detection unit scans the second data array, identifies the sensor electrode which exhibits the largest capacitance value, and generates second peak data which represents the sensor electrode thus identified.
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Accused Products
Abstract
In a touch-type input device, multiple sensor electrodes are arranged in a first coordinate axis direction. A capacitance detection circuit measures the electrostatic capacitances of the multiple sensor electrodes, and generates a first data array containing the capacitance value data which represents the electrostatic capacitances thus measured. A peak detection unit scans the first data array, identifies the sensor electrode which exhibits the largest capacitance, and generates first peak data which indicates the sensor electrode thus identified. Using the sensor electrode indicated by the first peak data as a reference, a computation processing unit reduces the value of the capacitance data of each sensor electrode arranged in a range within the capacitance value data contained in the first data array so as to generate a second data array, with the range having been selected using the sensor electrode indicated by the first peak data as a reference. A peak detection unit scans the second data array so as to generate second peak data.
45 Citations
18 Claims
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1. A touch-type input device comprising:
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a plurality of sensor electrodes arranged in a first coordinate axis direction, each of which is configured such that its electrostatic capacitance changes according to the circumstances of how a user touches the sensor electrodes; a capacitance detection circuit configured to measure the electrostatic capacitances of the plurality of sensor electrodes, and to generate a first data array containing capacitance value data which represents the electrostatic capacitances thus measured; a peak detection unit configured to scan the first data array, to identify the sensor electrode which exhibits the largest capacitance value, and to generate first peak data which represents the sensor electrode thus identified; and a computation processing unit configured to reduce the value of the capacitance data of each sensor electrode arranged in a range within the capacitance data contained in the first data array so as to generate a second data array, with the range having been selected using the sensor electrode indicated by the first peak data as a reference, wherein the peak detection unit scans the second data array, identifies the sensor electrode which exhibits the largest capacitance value, and generates second peak data which represents the sensor electrode thus identified. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control method for a touch-type input device having a plurality of sensor electrodes arranged in a first coordinate axis direction, the electrostatic capacitance of each of which is configured to change according to the circumstances of how a user touches the sensor electrodes, comprising:
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measuring the electrostatic capacitances of the plurality of sensor electrodes so as to generate a first data array containing capacitance value data which represents the electrostatic capacitances thus measured; scanning the first data array so as to identify the sensor electrode which exhibits the largest capacitance value; reducing the value of the capacitance data of each sensor electrode arranged in a range within the capacitance data contained in the first data array so as to generate a second data array, with the range having been selected using the sensor electrode indicated by the first peak data as a reference; and scanning the second data array so as to identify the sensor electrode which exhibits the largest capacitance value. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A touch-type input device provided at such a position that it is overlaid on a circuit which functions as a source of noise, and having a structure in which a substrate, sensor electrodes, and a cover which covers the sensor electrodes are layered in this order,
wherein the cover has a higher dielectric constant than that of the substrate.
Specification