Data-entry system
First Claim
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1. A data-entry system comprising:
- A. a two-axis analog entry device that senses successive locations thereon of a location indicator and generates location signals representing the location in terms of a pair of axis coordinates whereby one may enter on said entry device a graphic representation of a function by positioning the location indicator at successive locations thereon;
B. a two-axis display device operable to display thereon an independent-variable scale and a function scale and to indicate the values of a function of an independent variable for a series of values of the independent variable by generating thereon a graphical representation of the function that represents the values of the independent variable by distance from one axis in accordance with said independent-variable scale and represents the values of the function by distance from the other axis in accordance with said function scale; and
C. control means for operating said display device to display said function and independent-variable scales, for receiving said location signals from said analog entry device, and for responding to the location signals by operating said display device to display said graphical representation and by storing a series of values of the function represented by said graphical representation.
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Abstract
A processor (18) receives signals from an electronic tablet (10) that represent the positions of a stylus (12) on the tablet surface. The processor operates a cathode-ray tube (20) to display the locations represented by the tablet signals and present scales for interpreting the display as values of a function. It also stores the quantitative data represented by the display in accordance with the scales. A user can therefore enter quantitative data in an analog manner, which is more natural in many instances.
30 Citations
10 Claims
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1. A data-entry system comprising:
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A. a two-axis analog entry device that senses successive locations thereon of a location indicator and generates location signals representing the location in terms of a pair of axis coordinates whereby one may enter on said entry device a graphic representation of a function by positioning the location indicator at successive locations thereon; B. a two-axis display device operable to display thereon an independent-variable scale and a function scale and to indicate the values of a function of an independent variable for a series of values of the independent variable by generating thereon a graphical representation of the function that represents the values of the independent variable by distance from one axis in accordance with said independent-variable scale and represents the values of the function by distance from the other axis in accordance with said function scale; and C. control means for operating said display device to display said function and independent-variable scales, for receiving said location signals from said analog entry device, and for responding to the location signals by operating said display device to display said graphical representation and by storing a series of values of the function represented by said graphical representation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification