Phosphor protection for X-Y loops

Details Phosphor protection for X-Y loops Phosphor protection for X-Y loops

1975-10-22

1977-06-28

Smith, Jerry

Registers

Transfer mechanism

Traveling pawl

235198, 315379, 3401462, 340324A, G06G 728, G06F 314

Patent

active

040327604

ABSTRACT:
An improved X-Y or vector type cathode ray tube circuit includes means to sense the imminence of and to inhibit excessive concentrations of electron beam current during the plotting of X-Y loops, which concentrations produce spots or points on the cathode ray tube screen that are essentially repetitive and convey no useful information to the observer, and if allowed to persist, tend to burn the phosphor coating of said screen.

REFERENCES:
patent: 3509542 (1970-04-01), Ehrman
patent: 3643124 (1972-02-01), Aiani et al.
patent: 3665410 (1972-05-01), Holland
patent: 3700955 (1972-10-01), Lowe
patent: 3775760 (1973-11-01), Strathman
patent: 3878984 (1975-04-01), Sotiropoulos et al.
patent: 3889244 (1975-06-01), Sinobad
patent: 3924078 (1975-12-01), Bussey

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