Coordinate input device
First Claim
1. A coordinate input device comprising:
- a contact type coordinate detecting section provided with a first substrate having a plurality of X electrodes arranged in parallel in a X-axis direction and a second substrate having a plurality of Y electrodes arranged in parallel in a Y-axis direction, said first and second substrates being disposed in proximity to each other, said X electrodes and said Y electrodes being rendered conductive at a plurality of locations through a pushing operation of an operating means;
a scanning section for providing in sequence a scanning signal to said X electrodes;
a position detecting section for outputting said scanning signal as a detecting signal of the Y electrodes when said X electrodes are scanned; and
an arithmetic section for calculating a central position of said X electrodes and a central position of said Y electrodes on the basis of said scanning signal and said detecting signal, wherein said central position of said X electrode is calculated by the equation {(Xmax-Xmin)/2}+Xmin, said Xmax being a maximum conductive X electrode and Xmin being a minimum conductive X electrode selected from said plurality of conductive locations, and said central position of said Y electrode is calculated by the equation {(Ymax-Ymin/2}+Ymin, said Ymax being a maximum conductive Y electrode and Ymin being a minimum conductive Y electrode selected from said plurality of conductive locations, said central position of said X electrode and said central position of said Y electrode being outputted as new position detecting data coordinate and being temporarily stored in an internal memory further wherein said arithmetic section compares said new position detecting coordinate with a preceding position detecting data coordinate stored in said internal memory to determine any shift in said plurality of conductive locations, any said shift being outputted as a moving direction and a moving speed.
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Accused Products
Abstract
A coordinate input device of a low manufacturing cost is to be provided using a position detector and an arithmetic unit of simple configurations. The coordinate input device comprises a contact type coordinate detecting section provided with a first substrate having a plurality of X electrodes arranged in parallel in X-axis direction and a second substrate having a plurality of X electrodes arranged in parallel in X-axis direction, the first and second substrates being disposed in proximity to each other, and some of the X and Y electrodes being rendered conductive by a pushing operating of an operating means, a scanning section which provides scanning signals successively to the X electrodes, a position detecting section which outputs detection signals from the Y electrodes during scanning of the X electrodes, and an arithmetic section which calculates X and Y coordinate positions on the basis of both scanning signals and detection signals. The X and Y coordinate positions calculated by the arithmetic section correspond to central coordinate positions operated by the operating means and detected from the differences between conducted maximum X, Y coordinate positions and minimum X, Y coordinate positions.
17 Citations
3 Claims
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1. A coordinate input device comprising:
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a contact type coordinate detecting section provided with a first substrate having a plurality of X electrodes arranged in parallel in a X-axis direction and a second substrate having a plurality of Y electrodes arranged in parallel in a Y-axis direction, said first and second substrates being disposed in proximity to each other, said X electrodes and said Y electrodes being rendered conductive at a plurality of locations through a pushing operation of an operating means; a scanning section for providing in sequence a scanning signal to said X electrodes; a position detecting section for outputting said scanning signal as a detecting signal of the Y electrodes when said X electrodes are scanned; and an arithmetic section for calculating a central position of said X electrodes and a central position of said Y electrodes on the basis of said scanning signal and said detecting signal, wherein said central position of said X electrode is calculated by the equation {(Xmax-Xmin)/2}+Xmin, said Xmax being a maximum conductive X electrode and Xmin being a minimum conductive X electrode selected from said plurality of conductive locations, and said central position of said Y electrode is calculated by the equation {(Ymax-Ymin/2}+Ymin, said Ymax being a maximum conductive Y electrode and Ymin being a minimum conductive Y electrode selected from said plurality of conductive locations, said central position of said X electrode and said central position of said Y electrode being outputted as new position detecting data coordinate and being temporarily stored in an internal memory further wherein said arithmetic section compares said new position detecting coordinate with a preceding position detecting data coordinate stored in said internal memory to determine any shift in said plurality of conductive locations, any said shift being outputted as a moving direction and a moving speed. - View Dependent Claims (2, 3)
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Specification