Apparatus for detecting X and Y coordinates of input points
First Claim
1. In an apparatus for detecting X and Y coordinates of input points comprising an input surface including a first parallel electrode group and a second, flexible parallel electrode group opposing and intersecting the first parallel electrode group, a first resistor being in electrical contact with electrode conductors of the first parallel electrode group at one end thereof, a second resistor being in electrical contact with electrode conductors of the second parallel electrde group at one end thereof, and electrical detection means for detecting the input position on the input surface by using electrical signals generated from the first and second resistors, the improvement which comprises a pressure conductive rubber sheet interposed between the first and second parallel electrode groups, said sheet being rendered conductive upon application of pressure to the input surface, and means provided in said electrical detection means for detecting currents flowing through said first and said second resistors,whereby said X and Y coordinates of input points are detected by measuring said currents flowing through said first and second resistors.
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Accused Products
Abstract
The input surface of the apparatus for detecting X and Y coordinates of the input points comprises a first parallel electrode group, a second flexible parallel electrode group opposing and intersecting the first parallel electrode group. A pressure conductive rubber sheet which becomes conductive when the pressure is applied to the input surface is interposed between the two electrode groups. First and second resistors are provided which are in electrical contact with terminal ends of the two electrode groups. Electric signals from the first and second resistors are used to detect X and Y coordinates of input points on the input surface.
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Citations
10 Claims
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1. In an apparatus for detecting X and Y coordinates of input points comprising an input surface including a first parallel electrode group and a second, flexible parallel electrode group opposing and intersecting the first parallel electrode group, a first resistor being in electrical contact with electrode conductors of the first parallel electrode group at one end thereof, a second resistor being in electrical contact with electrode conductors of the second parallel electrde group at one end thereof, and electrical detection means for detecting the input position on the input surface by using electrical signals generated from the first and second resistors, the improvement which comprises a pressure conductive rubber sheet interposed between the first and second parallel electrode groups, said sheet being rendered conductive upon application of pressure to the input surface, and means provided in said electrical detection means for detecting currents flowing through said first and said second resistors,
whereby said X and Y coordinates of input points are detected by measuring said currents flowing through said first and second resistors.
Specification