Field-coupled pointing device

Details Field-coupled pointing device Field-coupled pointing device

1982-12-13

1986-01-14

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

178 18, 178 19, G09G 300

Patent

active

045648352

ABSTRACT:
A pointing device comprises a mouse tablet having a regular repetitive pattern of field sensitive pixels on the surface thereof, and a mouse including coupling elements movable across the mouse tablet, wherein the coupling elements establish position-dependent field coupling with the pixels. Analysis of the coupling yields mouse motion and direction of motion. In one embodiment, the pixels are deployed in rows and columns and a pair of coupling elements are provided for sensing motion and direction of motion in each axis. The coupling elements are elongated to be non-responsive in the axis of non-interest, and are spaced apart to provide phase-shifted output from which direction of motion can be determined. In another embodiment, ferrous pixel strips are provided in one axis and non-ferrous pixel strips are provided in the other axis, with the coupling elements for the respective axis being adapted to field couple with the pixels of interest. The coupling elements are generally coils connected in oscillator circuits but some are capacitors. The mouse motion and direction of motion can be expressed in a "gray" code derived from the phase-shifted outputs or can be based on analysis of the outputs with switching between the phase-shifted output signals at ambiguity points.

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patent: 4364035 (1982-12-01), Kirsch
patent: 4390873 (1983-06-01), Kirsch
patent: 4418242 (1983-11-01), Kouno
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