Coordinate input apparatus, control method therefor, and computer-readable memory
First Claim
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1. A coordinate input apparatus which detects three-dimensional position coordinates of an indicating tool, comprising:
- detection means for detecting a three-dimensional coordinate value of the indicating tool which is defined in first, second, and third dimensions;
comparing means for comparing a coordinate value in the first dimension of the three-dimensional coordinate value with a predetermined value;
storage means for storing a first coordinate value detected by said detection means at a first time point in an any period; and
control means for controlling outputting of a difference between the first coordinate value and a second coordinate value detected by said detection means after the first time point.
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Abstract
A signal waveform detection circuit detects the three-dimensional coordinate value of an indicating tool which is defined in the first, second, and third dimensions. An arithmetic control circuit compares the coordinate value in the first dimension of the three-dimensional coordinate value with a predetermined value, and controls outputting of the coordinate values in the second and third dimensions on the basis of the comparison result.
66 Citations
13 Claims
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1. A coordinate input apparatus which detects three-dimensional position coordinates of an indicating tool, comprising:
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detection means for detecting a three-dimensional coordinate value of the indicating tool which is defined in first, second, and third dimensions;
comparing means for comparing a coordinate value in the first dimension of the three-dimensional coordinate value with a predetermined value;
storage means for storing a first coordinate value detected by said detection means at a first time point in an any period; and
control means for controlling outputting of a difference between the first coordinate value and a second coordinate value detected by said detection means after the first time point. - View Dependent Claims (2, 3, 4, 5, 12)
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6. A control method for a coordinate input apparatus which detects three-dimensional position coordinates of an indicating tool, comprising:
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a detection step of detecting a three-dimensional coordinate value of the indicating tool which is defined in first, second, and third dimensions;
a comparing step of comparing a coordinate value in the first dimension of the three-dimensional coordinate value with a predetermined value;
a storage step for storing a first coordinate value detected in the detection step at a first time point in an any period; and
a control step for controlling outputting of a difference between the first coordinate value and a second coordinate value detected in the detection step after the first time point. - View Dependent Claims (7, 8, 9, 10, 13)
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11. A computer-readable memory storing a program code for controlling a coordinate input apparatus which detects three-dimensional position coordinates of an indicating tool, wherein the program code comprises:
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a program code for a detection step of detecting a three-dimensional coordinate value of the indicating tool which is defined in first, second, and third dimensions;
a program code for a comparing step of comparing a coordinate value in the first dimension of the three-dimensional coordinate value with a predetermined value;
a program code for a storage step for storing a first coordinate value detected in the detection step at a first time point in an any period; and
a program code for a control step for controlling outputting of the first coordinate value and a difference between a second coordinate value detected in the detection step after the first time point.
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Specification