Functional curve displaying process and apparatus

Details Functional curve displaying process and apparatus Functional curve displaying process and apparatus

1978-07-27

1980-09-09

Gruber, Felix D.

Boots, shoes, and leggings

324 88, 340805, 358 10, 358139, 364855, H04N 962, H07N 718, G06K 1520

Patent

active

042221064

ABSTRACT:
A process and two embodiments of an apparatus are disclosed for displaying, on the screen of a conventional home television receiver, curves illustrating analog signal potential functions of the form U(x,y). The process generally requires generating first and second saw-tooth signals synchronized with the vertical and horizontal sync. signals of the picture raster of the home television receiver. At least part of each of the signal potentials U.sub.y and U.sub.x are then compared with the first and second saw-tooth signals to generate first and second impulse signals respectively when equal potential conditions are observed. The first impulse signal is then differentiated with respect to time to form a gate impulse signal of adjustable width for controlling the processing of signal potential U.sub.x. The second impulse signal is differentiated with respect to time to form a brightness control signal for output to the home television receiver.

REFERENCES:
patent: Re28507 (1975-08-01), Rush
patent: 3122607 (1964-02-01), Balding
patent: 3145378 (1964-08-01), Lyons, Jr.
patent: 3164822 (1965-01-01), Uphoff
patent: 3649819 (1972-03-01), Waller
patent: 3739347 (1973-06-01), Forsberg
patent: 3906197 (1975-09-01), Grover
patent: 3984827 (1976-10-01), Hickin et al.
patent: 4068310 (1978-01-01), Friauf

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