Interactive overlay driven computer display system

Details Interactive overlay driven computer display system Interactive overlay driven computer display system

1988-05-09

1991-04-23

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

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

340712, G09G 500

Patent

active

050103237

ABSTRACT:
An overlay driven display system incorporating a digitizer tablet and a stylus for providing coordinate signals to a computer which signals are representative of the coordinates of any point on the tablet selected by the position of the stylus on the tablet. The computer is coupled to a display device, such as a CRT, for displaying addressed data, such as graphic information. An overlay, randomly positionable on the digitizer tablet, contains areas relating to the position of tablet coordinate signals that correspond to the addresses of the data stored in the computer. Three triangularly positioned points on the overlay identify a unique triangle which relates the overlay to the unique angular relationship of the computer file. Software is provided for translating the overlay points to the coordinate system of the digitizer tablet and for scaling the points to match the coordinate system of the digitizer tablet such that the file corresponding to the overlay is accessed and areas on the overlay, when selected by the angular relationship of the points on the stylus, are displayed on the CRT. Overlapping of overlays is permitted to allow the simultaneous display of a plurality of files. The system also permits other than three points to be used.

REFERENCES:
patent: 4442317 (1984-04-01), Jandrell
patent: 4710758 (1987-12-01), Mussler et al.
patent: 4716542 (1987-12-01), Peltz et al.

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