Three-dimensional data acquisition on a two-dimensional input de

Details Three-dimensional data acquisition on a two-dimensional input de Three-dimensional data acquisition on a two-dimensional input de

1991-12-19

1993-11-16

Yusko, Donald J.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 20, 178 18, G08C 2100

Patent

active

052627780

ABSTRACT:
A method and apparatus for providing signals indicative of X, Y, and Z parameter values onto a computer controlled display system having a computer and a display. A user activated input device is provided for sensing an input signal with an X value, a Y value and a Z value in the display system. The input device includes (i) a first electrically conductive sheet having a first terminal and a second terminal, (ii) a second electrically conductive sheet having a third terminal and a fourth terminal, and (iii) a separator separating the first conductive sheet and the second conductive sheet. The input signal is provided by applying a pressure at a location on the first conductive sheet of the input device. The first sheet contacts the second sheet at the location. The location on the first conductive sheet corresponds to the X position and the Y position of the input signal to the display system. The pressure at the location corresponds to the Z value of the input signal to the display system. A predetermined current (I) is applied at the first terminal of the first sheet and a ground at the third terminal of the second sheet. The X position, the Y position, and the Z values are measured by measuring a first voltage (V.sub.1) at the first terminal of the first sheet, a second voltage (V.sub.2) at the second terminal of the first sheet, and a third voltage (V.sub.3) at the fourth terminal of the second sheet, wherein the X, Y, and Z values can be obtained from the following equations: ##EQU1##

REFERENCES:
patent: 4687885 (1987-08-01), Talmage, Jr. et al.
patent: 4897511 (1990-01-01), Itaya et al.
patent: 4983786 (1991-01-01), Stevens et al.
Herot et al; "One Point Touch Input of Vector Information For Computer Displays"; Computer Graphics; vol. 12, No. 3; Aug. 1978; pp. 275-281.

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